Document:

Exelon Corporation Retirement Program

 Exhibit 10.2 

EXELON CORPORATION RETIREMENT PROGRAM 

As Amended and Restated Effective January 1, 2013 

 EXELON CORPORATION RETIREMENT PROGRAM 

INTRODUCTION 
 The title of
this Plan shall be the “Exelon Corporation Retirement Program.” This Plan is an amendment and restatement of the Commonwealth Edison Company Service Annuity System as in effect on December 30, 2001 and reflects the merger of the
Service Annuity Plan of PECO Energy Company into the Plan effective December 31, 2001, and as previously amended and restated, and subsequent amendments and restatements. This amendment and restatement, except as otherwise provided herein,
shall apply to Employees whose employment is terminated on or after January 1, 2013 and to the surviving spouses and surviving dependent children of such Employees. The rights and benefits of Employees whose employment terminates on or before
December 31, 2012 and of the surviving spouses and surviving dependent children of such Employees shall, except as otherwise provided herein, be determined under the Plan as in effect at the time of such Employees’ termination, including
any provisions of this Plan effective at such time. 
 Subject to the foregoing, individuals who are “Participants” as defined in
the document designated as the Commonwealth Edison Company Service Annuity System and attached hereto as Appendix A shall have their benefit under the Plan determined exclusively by the terms of Appendix A hereto. Individuals who are
“Participants” as defined in the document designated as the Service Annuity Plan of PECO Energy Company and attached hereto as Appendix B shall have their benefit under the Plan determined exclusively by the terms of Appendix B hereto.

  
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 APPENDIX A 

COMMONWEALTH EDISON COMPANY 

SERVICE ANNUITY SYSTEM 

Under the Exelon Corporation Retirement Program 

(Amended and Restated as of January 1, 2013) 

 TABLE OF CONTENTS 
  

							
	 	 	 	  	Page	 
	 ARTICLE 1 ESTABLISHMENT AND PURPOSE
	  	 	1	  
		
	 ARTICLE 2 DEFINITIONS
	  	 	2	  
			
	 Section 2.1.
	 	 Defined Terms
	  	 	2	  
	 Section 2.2.
	 	 Gender and Plurals
	  	 	12	  
	 Section 2.3.
	 	 Definition of “Highly Compensated Employee”
	  	 	12	  
		
	 ARTICLE 3 PARTICIPATION
	  	 	12	  
			
	 Section 3.1.
	 	 Employees Represented by IBEW Local Union 15
	  	 	12	  
	 Section 3.2.
	 	 Management Employees
	  	 	13	  
	 Section 3.3.
	 	 Cessation of Participation
	  	 	15	  
	 Section 3.4.
	 	 Certain Rehired Employees
	  	 	15	  
		
	 ARTICLE 4 CONTRIBUTIONS
	  	 	16	  
			
	 Section 4.1.
	 	 Amount of Contributions
	  	 	16	  
	 Section 4.2.
	 	 Return of Contributions
	  	 	16	  
		
	 ARTICLE 5 SERVICE ANNUITIES
	  	 	17	  
			
	 Section 5.1.
	 	 Description of Service Annuities
	  	 	17	  
	 Section 5.2.
	 	 Normal and Deferred Retirement
	  	 	18	  
	 Section 5.3.
	 	 Early Retirement
	  	 	21	  
	 Section 5.4.
	 	 Disability Retirement at or After Age 45
	  	 	22	  
	 Section 5.5.
	 	 Disability Retirement Before Age 45
	  	 	24	  
	 Section 5.6.
	 	 Federal Benefit Supplemental Payments Prior to Age 65
	  	 	26	  
	 Section 5.7.
	 	 Deferred Vested Termination
	  	 	26	  
	 Section 5.8.
	 	 Special Rules Applicable to the Computation of Service Annuities
	  	 	28	  
	 Section 5.9.
	 	 Post Retirement Adjustments
	  	 	31	  
		
	 ARTICLE 6 SERVICE ANNUITY FORMS
	  	 	35	  
			
	 Section 6.1.
	 	 Basic Service Annuity Form
	  	 	35	  
	 Section 6.2.
	 	 Optional Service Annuity Forms
	  	 	36	  
	 Section 6.3.
	 	 Pre-retirement Surviving Spouse Benefit
	  	 	38	  
	 Section 6.4.
	 	 Pre-retirement Surviving Child Benefits
	  	 	42	  
	 Section 6.5.
	 	 Death Benefits for Spouse or Child of Participant Who Dies During Employment After Age 65
	  	 	43	  
	 Section 6.6.
	 	 Election Procedure
	  	 	43	  
	 Section 6.7.
	 	 Lump Sum Payment
	  	 	48	  
	 Section 6.8.
	 	 Distributions to Dependent Minor and Disabled Children
	  	 	51	  
	 Section 6.9.
	 	 Special Lump Sum Payment Option
	  	 	51	  

  
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	 ARTICLE 7 LIMITATIONS ON BENEFITS
	  	 	55	  
			
	 Section 7.1.
	  	Maximum Annual Benefits	  	 	55	  
	 Section 7.2.
	  	Temporary Restrictions on Benefits in Case of Termination or Curtailment	  	 	58	  
	 Section 7.3.
	  	Benefit Restrictions as a Result of Funding	  	 	59	  
		
	 ARTICLE 8 SERVICE ANNUITY FUND
	  	 	61	  
		
	 ARTICLE 9 SPECIAL RULES RELATING TO PARTICIPATION OF AND DISTRIBUTION TO CERTAIN TERMINATED OR TRANSFERRED
EMPLOYEES
	  	 	63	  
			
	 Section 9.1.
	  	Employment After Commencement of Service Annuity	  	 	63	  
	 Section 9.2.
	  	Social Security Increases	  	 	64	  
	 Section 9.3.
	  	Leased Employees	  	 	64	  
	 Section 9.4.
	  	Suspension of Service Annuities	  	 	65	  
	 Section 9.5.
	  	Reemployment Before Commencement of Service Annuity	  	 	67	  
	 Section 9.6.
	  	Employees whose Representation by IBEW Local Union 15 Changes	  	 	69	  
	 Section 9.7.
	  	Transfer of Employment to or Reemployment in Positions Eligible for Participation in the Plan or the Service Annuity Plan of PECO Energy Company by Certain Individuals Who Were Participants in Such a Plan on December 31,
2000	  	 	70	  
	 Section 9.8.
	  	Change in Employment Status or Transfer to Affiliate	  	 	71	  
	 Section 9.9.
	  	Certain Rehired Employees	  	 	71	  
	 Section 9.10.
	  	Transfer of Employment to or from Facilities formerly Owned by CEG	  	 	72	  
		
	 ARTICLE 10 ADMINISTRATION
	  	 	73	  
			
	 Section 10.1.
	  	The Administrator, the Investment Office and the Corporate Investment Committee	  	 	73	  
	 Section 10.2.
	  	Claims Procedure	  	 	78	  
	 Section 10.3.
	  	Procedures for Domestic Relations Orders	  	 	80	  
	 Section 10.4.
	  	Computation of Benefits	  	 	81	  
	 Section 10.5.
	  	Actuary to Be Employed	  	 	81	  
	 Section 10.6.
	  	Funding Policy	  	 	81	  
	 Section 10.7.
	  	Notices to Participants, Etc.	  	 	82	  
	 Section 10.8.
	  	Notices to Employers or Administrator	  	 	82	  
	 Section 10.9.
	  	Records	  	 	82	  
	 Section 10.10.
	  	Responsibility to Advise Administrator of Current Address	  	 	82	  
	 Section 10.11.
	  	Electronic Media	  	 	83	  
	 Section 10.12.
	  	Correction of Error	  	 	83	  

  
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	 ARTICLE 11 PARTICIPATION BY OTHER EMPLOYERS
	  	 	84	  
			
	 Section 11.1.
	  	Adoption of Plan	  	 	84	  
	 Section 11.2.
	  	Withdrawal from Participation	  	 	84	  
	 Section 11.3.
	  	Company and Administrator Agent for Employers	  	 	84	  
		
	 ARTICLE 12 CONTINUANCE BY A SUCCESSOR
	  	 	85	  
		
	 ARTICLE 13 MISCELLANEOUS
	  	 	86	  
			
	 Section 13.1.
	  	Expenses	  	 	86	  
	 Section 13.2.
	  	Non-Assignability	  	 	86	  
	 Section 13.3.
	  	Employment Non-Contractual	  	 	89	  
	 Section 13.4.
	  	Limitation of Rights	  	 	89	  
	 Section 13.5.
	  	Merger or Consolidation with or Transfer to Another Plan	  	 	89	  
	 Section 13.6.
	  	Medical Examination	  	 	91	  
	 Section 13.7.
	  	Applicable Law	  	 	91	  
	 Section 13.8.
	  	Statute of Limitations for Actions under the Plan	  	 	92	  
	 Section 13.9.
	  	Forum for Legal Actions under the Plan	  	 	92	  
	 Section 13.10.
	  	Legal Fees	  	 	92	  
		
	 ARTICLE 14 TOP-HEAVY PLAN REQUIREMENTS
	  	 	93	  
			
	 Section 14.1.
	  	Top-Heavy Plan Determination	  	 	93	  
	 Section 14.2.
	  	Minimum Benefit for Top-Heavy Years	  	 	95	  
	 Section 14.3.
	  	Top-Heavy Vesting Requirements	  	 	96	  
	 Section 14.4.
	  	Special Rules for Applying Statutory Limitations on Benefits	  	 	97	  
		
	 ARTICLE 15 AMENDMENT AND TERMINATION
	  	 	97	  
			
	 Section 15.1.
	  	Amendment	  	 	97	  
	 Section 15.2.
	  	Establishment of Separate Plan	  	 	98	  
	 Section 15.3.
	  	Termination of the Plan by an Employer	  	 	99	  
	 Section 15.4.
	  	Distribution upon Termination or Partial Termination	  	 	99	  
	 Section 15.5.
	  	Trust to Be Applied Exclusively for Participants and Their Beneficiaries	  	 	100	  

  
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 COMMONWEALTH EDISON COMPANY 

SERVICE ANNUITY SYSTEM 
 ARTICLE 1

 ESTABLISHMENT AND PURPOSE 

The title of this Plan shall be the “Commonwealth Edison Company Service Annuity System”. This Plan is an amendment and restatement
of the Commonwealth Edison Company Service Annuity System as in effect on December 31, 2012 and, except as otherwise provided, shall apply to Employees whose employment is terminated on or after January 1, 2013 and to the surviving Spouses
and surviving dependent children of such Employees. The benefits of Employees whose employment terminates before January 1, 2013 and of the surviving Spouses and surviving dependent children of such Employees shall be determined under the
Commonwealth Edison Company Service Annuity System as in effect at the time of such Employees’ termination, including any provisions of this Plan effective at such time; provided, however, that the provisions of Article 7 (relating to
limitations on benefits), Article 9 (relating to special rules relating to participation of and distribution to certain terminated or transferred employees), Article 10 (relating to administration), Article 13 (relating to miscellaneous provisions)
and Article 15 (relating to amendment and termination of the Plan) shall be effective for all such persons. 
 For purposes of the Plan, the
phrase “a member of IBEW Local Union 15” shall mean an employee whose terms of employment are subject to a collective bargaining agreement between IBEW Local Union 15 and his or her employer. 

 ARTICLE 2 

DEFINITIONS 
 Section 2.1.
Defined Terms. As used herein the following words and phrases shall have the following respective meanings when capitalized unless the context clearly indicates otherwise: 

(1) Administrator. The Company acting through its Vice President, Health & Benefits or such other person
appointed pursuant to Section 10.1. 
 (2) Affiliate. (a) A corporation which is a member of the same
controlled group of corporations (within the meaning of Section 414(b) of the Code) as an Employer, (b) a trade or business (whether or not incorporated) under common control (within the meaning of Section 414(c) of the Code) with an
Employer, (c) an organization (whether or not incorporated) that is a member of an affiliated service group (within the meaning of Section 414(m) of the Code) that includes an Employer, a corporation described in clause (a) of this
subdivision or a trade or business described in clause (b) of this subdivision, or (d) any other entity that is required to be aggregated with an Employer pursuant to Regulations promulgated under Section 414(o) of the Code. 

(3) Annuity Starting Date. The first day on which a Service Annuity is payable to a Participant. 

(4) Basic Compensation. A Participant’s base pay rate per pay period, as determined by the Administrator. For
purposes of the preceding sentence, a Participant’s base pay rate per pay period shall include (i) any amount contributed by the Participant’s Employer on behalf of such Participant for such year to the Participant’s Before-Tax
Contributions Account under the Exelon Corporation Employee Savings Plan, a qualified transportation fringe benefit plan described in section 132(f) of the Code, the Exelon Corporation Benefits Contribution Options or the Exelon Corporation Key
Choices Program and (ii) such other types of compensation or payments as may be determined by the Administrator from time to time or as may be set forth from time to time in Exhibit 1 attached hereto, and shall exclude (i) bonuses (other
than meter readers’ bonuses, other bonuses included in Basic Compensation as described in Exhibit 1 and any payment for ratification of a collective bargaining agreement), (ii) overtime pay, (iii) shift premiums and (iv) such
other types of compensation or payments as may be determined by the Administrator from time to time or as may be set forth from time to time in Exhibit 1 attached hereto. In the case of a Participant who is absent from employment due to either an
authorized leave of absence (including a leave of absence for participation in Military Service) or employment by a union that represents any group of Employees, Basic Compensation shall mean, for the

  
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period during which the Participant is absent due to an authorized leave of absence or employment by such union, the Participant’s base pay rate per pay period in effect immediately
preceding the first day of the Participant’s authorized leave of absence or employment by a union, as the case may be. A Participant whose Termination of Employment occurs on account of a Total and Permanent Disability, but who is not then
eligible for a Service Annuity under Section 5.2 (relating to normal and deferred retirement), Section 5.3 (relating to early retirement), Section 5.4 (relating to disability retirement at or after age 45) or Section 5.5
(relating to disability retirement before age 45) shall not be treated as having any Basic Compensation for periods of Credited Service after such Termination of Employment. A Participant whose Termination of Employment occurs on account of a Total
and Permanent Disability and who is receiving benefits under any Employer’s long term disability plan shall be treated for periods of Credited Service after such Termination of Employment as having Basic Compensation determined under
Section 5.2(c). 
 (5) Beneficiary. A Participant’s Spouse or the Participant’s Dependent Minor Child
or Dependent Disabled Child entitled, in the event of the death of the Participant, to receive a Service Annuity, under Section 6.3 (relating to the pre-retirement surviving spouse benefit), Section 6.4 (relating to the pre-retirement
surviving child benefits) or Section 6.5 (relating to death benefits with respect to certain Participants who die during employment and after age 65). To the extent required by law and where applicable in the Plan, an alternate payee entitled
to receive a Service Annuity under paragraph (b) of Section 13.2 (relating to exception to non-assignability for qualified domestic relations orders) shall also be a Beneficiary. 

(6) CEG. Constellation Energy Group, Inc. and any of its affiliates that was an affiliate immediately before the Effective
Time (as such term is defined in the Merger Agreement). 
 (7) Child. A Participant’s natural child born
prior to the time payment of the Participant’s Service Annuity commences hereunder or a child adopted by a Participant prior to the time payment of the Participant’s Service Annuity commences hereunder. 

(8) Code. The Internal Revenue Code of 1986, as amended. 

(9) Company. Exelon Corporation, a Pennsylvania corporation, or any successor or successors. 

(10) Consumer Price Index. The United States Bureau of Labor Statistics Consumer Price Index (U.S. City Average
1967 = 100). Such term shall also mean such index as it may from time to time be changed or, if it shall be discontinued, the most nearly comparable index, appropriately adjusted to yield results comparable with those which would have been
produced if the index as defined in the preceding sentence had been used, as determined by the Investment Office. 

  
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 (11) Corporate Investment Committee. The Company acting through the
committee consisting of the executives or other persons designated from time to time in the charter of such Committee. 

(12) Credited Service. The period of a Participant’s employment as an Eligible Employee which is used to compute
the Participant’s Service Annuity and eligibility for commencement of payment of such Service Annuity under Article 5 (relating to Service Annuities) and Article 6 (relating to Service Annuity forms). A Participant’s Credited Service
includes (a) the Participant’s Credited Service prior to the Effective Date determined in accordance with the provisions of the Plan as in effect prior to the Effective Date, (b) to the extent not duplicative, for a Participant who
terminated employment prior to January 1, 2003, any additional service for actual employment credited to such Participant prior to the Effective Date in an Employer’s employment records pursuant to Commonwealth Edison Company’s
service bridging policy, and (c) the period beginning on the Effective Date during which the Participant shall have been an Eligible Employee, including, (i) any period during which the Participant is in Military Service, provided that the
Participant returns to the employ of an Employer within the period prescribed by laws relating to the reemployment rights of persons in Military Service, (ii) any period during which the Participant is employed by a union that represents any
group of Employees, (iii) any period for which back pay is awarded to the Participant and pursuant to which award the Participant is required to receive Credited Service under the Plan, (iv) the period following Termination of Employment
on account of a Total and Permanent Disability during which the Participant is receiving benefits under any Employer’s long term disability plan and (v) as and to the extent provided by resolutions of the board of directors of the Company,
(1) any period of employment by Affiliates or other companies, and (2) any period of authorized absence from such employment or from employment as an Eligible Employee. A Participant’s periods of Credited Service before and after a
period of absence from employment that is not included in the Participant’s Credited Service pursuant to the preceding sentences shall be aggregated only if (i) the Participant completes at least one year of Credited Service after such
period of absence and (ii) the number of years of such period of absence from employment is less than five. 
 (13)
Dependent Minor Child. A Child who, as of the time of the Participant’s retirement or death, is under the age of 21 and qualifies as a dependent of the Participant within the meaning of Section 152 of the Code. 

(14) Dependent Disabled Child. A Child who, as of the time of the Participant’s retirement or death, has a
permanent physical or mental disability, as certified by the medical director of the Company or by such other licensed physician designated by the Administrator, that causes such Child to be unable to engage in substantial gainful employment, and is
a dependent of the Participant within the meaning of Section 152 of the Code (determined by disregarding any age limitation contained in Section 152 of the Code). 

  
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 (15) Earnings. The Participant’s earnings during the
Participant’s period of Credited Service on and before December 25, 1994 determined in accordance with the provisions of the Plan as in effect prior to April 1, 1995. 

(16) Effective Date. Except as otherwise specifically provided herein, the Effective Date of this amendment and
restatement of the Plan with respect to the Company and any other entity that was an Employer on December 31, 2012 shall be January 1, 2012 and in the case of any other Employer shall be the date designated by such Employer. 

(17) Eligible Employee. (a) Any Employee who was an Eligible Employee on December 31, 2000, and who is
receiving regular salary or wages from and rendering services to an Employer, or any such individual who is on an authorized leave of absence, and (b) on or after January 1, 2001, any Employee whose first Hour of Service with an Employer
is prior to January 1, 2009 and who (i) is a member of IBEW Local Union 15 who becomes initially employed at a facility that, as of October 19, 2000, was owned by Commonwealth Edison Company, Unicom Corporation or any affiliate of
Unicom Corporation, (ii) elects to participate in this Plan and (iii) is either receiving regular salary or wages from and rendering services to an Employer, or is on an authorized leave of absence; but, in either case excluding
(i) an Employee the terms of whose employment are subject to a collective bargaining agreement that does not provide for participation in this Plan, (ii) an Employee paid on the temporary payroll of an Employer who has never completed at
least 1,000 Hours of Service in any period of twelve consecutive months beginning with the Employee’s date of hire or anniversary thereof, (iii) an Employee who executes a written waiver of his or her right to participate in the Plan;
(iv) an individual who performs services for an Employer, pursuant to an agreement (written or oral) that classifies such individual’s relationship with the Employer as other than an Employee regardless of whether such individual is at any
time determined to be an Employee; (v) on or after the Effective Time, an individual who was employed immediately prior to the Effective Time (as such term is defined in the Merger Agreement) at CEG or a facility owned immediately before the
Effective Time by CEG and (vi) an individual who is newly employed on or after the Effective Time (as such term is defined in the Merger Agreement) at a facility owned immediately before the Effective Time by CEG. Notwithstanding anything
contained in the Plan to the contrary, any Employer may, at the time such Employer elects to participate in this Plan in the manner described in Section 11.1 (relating to adoption of the Plan), designate, with the consent of the Company, a
specified group of Employees who will be Eligible Employees. In the case of Unicom Thermal Technologies Inc. (“Unicom Thermal”), the term “Eligible Employee” shall mean only those persons rendering service to Unicom Thermal who
(i) formerly were employed by the Company, (ii) transferred from the employment of the Company to the employment of Unicom Thermal at the request of the Company, (iii) are 

  
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otherwise described in the definition of Eligible Employee set forth in this subdivision (16) and (iv) completed at least ten years of Credited Service under the Plan at the time of
transfer from the employment of the Company to the employment of Unicom Thermal; provided, however, any such Employee who had at least eight years of Credited Service at the time of such transfer shall continue to be an Eligible Employee in the Plan
until such Employee completes ten years of Credited Service. In the case of any individual who, as of December 31, 2000, was an Employee of Commonwealth Edison Company and who subsequently transfers employment to employment with the Exelon
Power Team, such individual shall remain an Eligible Employee through the second anniversary of the date of such transfer of employment, and shall not thereafter be an Eligible Employee. Notwithstanding the preceding sentence, an individual who, as
of December 31, 2000, was an Employee of Commonwealth Edison Company and who transferred employment to employment with the Exelon Power Team shall be an Eligible Employee as of January 1, 2004, and, without limiting the preceding clause,
an individual who transfers employment from employment with an Employer to employment with the Exelon Power Team during 2003 and who was an Eligible Employee immediately prior to such transfer shall continue to be an Eligible Employee until
December 31, 2003 and each individual who transfers employment from the Exelon Power Team to an Employer during 2003 shall not be an Eligible Employee prior to January 1, 2004. In the case of Exelon Services Inc., the term “Eligible
Employee” shall be limited to those Employees of Exelon Services Inc. who were on the payroll of Unicom Energy Solutions as of April 1, 2001 and are otherwise Eligible Employees. Notwithstanding anything contained herein to the contrary,
an Eligible Employee shall not include an individual who has received a Special Lump Sum Payment or an Immediately Commencing Annuity in accordance with Section 6.9 (relating to Special Lump Sum Payment Option). 

(18) Employee. An individual whose relationship with an Employer is, under common law, that of an employee. 

(19) Employer. The Company and any other Affiliate set forth on Appendix I hereto that, with the consent of the Company,
elects to participate in the Plan in the manner described in Section 11.1 (relating to adoption of the Plan) either with respect to all Employees or a specified group of Employees of such Affiliate and any successor Affiliate that adopts this
Plan pursuant to Article 12 (relating to continuance by a successor). If any entity described in the preceding sentence withdraws from participation in the Plan pursuant to Section 15.3 (relating to termination of the Plan by an Employer), such
entity shall thereupon cease to be an Employer. Appendix I shall be updated from time to time by the Company to reflect any adoption pursuant to Section 11.1, but the failure to so update such Appendix shall not affect the effectiveness of any
such adoption. Such adoptions will be effective whether occurring before, on or after the Effective Date and whether or not reflected in Appendix I. 

  
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 (20) ERISA. The Employee Retirement Income Security Act of 1974, as
amended. 
 (21) Federal Benefit. The annual amount of full old age benefits which would be payable to the Participant
under the Federal Social Security Act at the age at which full old age benefits would be payable to such Participant under such Act. Except as provided in the following sentence, the amount of the Federal Benefit and the age at which full old age
benefits become payable shall be determined as of December 25, 1994 in accordance with the provisions of the Plan as in effect on such date. Notwithstanding the preceding sentence, solely for purposes of Section 5.6 (relating to Federal
Benefit supplemental payments), the amount of Federal Benefit and the age at which full old age benefits become payable shall be determined at the time of a Participant’s Termination of Employment by using the terms of the Federal Social
Security Act as in effect at such time. For purposes of the preceding sentence, the amount of Federal Benefit shall be computed (a) with respect to a member of IBEW Local Union 15 whose Termination of Employment occurs on or after
January 1, 2011, by using the Participant’s compensation subject to tax under the Federal Insurance Contributions Act (other than the Medicare portion), and (b) with respect to any other Participant, by using an estimated wage history
determined by applying a salary scale based on the actual change in the average national wage from year to year as determined by the Social Security Administration, projected backwards, to the Participant’s compensation subject to tax under the
Federal Insurance Contributions Act (other than the Medicare portion) for the calendar year ending immediately prior to the Participant’s Termination of Employment. Notwithstanding the preceding sentence, in no event shall a Participant’s
Federal Benefit be greater than the Federal Benefit determined by using a wage history that assumes the Participant earned no compensation for periods prior to employment with the Company and Affiliates and uses actual compensation paid by the
Company and Affiliates for periods of employment with the Company and Affiliates and, in the case of a Participant who is absent from employment due to employment by a union that represents any group of Employees, uses actual compensation paid by
such union for periods of employment with such union 
 (22) Highest Average Annual Pay. The sum of a
Participant’s average annual Basic Compensation and Incentive Pay (a) with respect to any Participant who, as of the date of the Participant’s Termination of Employment, is not a member of IBEW Local Union 15, during the four
consecutive years (104 biweekly pay periods), and (b) with respect to any Participant who, as of the date of the Participant’s Termination of Employment, is a member of IBEW Local Union 15, during which such average annual Basic
Compensation and Incentive Pay was the highest, or (c) during all years of the Participant’s Credited Service if such Credited Service is less than 104 or 78 biweekly pay periods, as applicable. In determining whether a Participant has 104
or 78 consecutive biweekly pay periods, as applicable, any period of uncompensated absence from employment with an Employer, other than an absence due to participation in Military Service shall be disregarded. In computing “Highest Average
Annual Pay,” the total of 

  
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the Basic Compensation and Incentive Pay for a Participant for the applicable consecutive pay periods shall be multiplied, in the case of 104 pay periods by 0.25068654 and in the case of 78 pay
periods by 0.33424872; provided, that in the case of a Participant whose years of Credited Service include fewer than 104 or 78 pay periods, as applicable, the multiplier shall be a fraction the numerator of which is one and the denominator of which
is the quotient of (a) the number of 14-day periods during each 365-day period (or if less, during the Participant’s Credited Service) and (b) the number of pay periods during the Participant’s years of Credited Service. In
addition, notwithstanding anything herein to the contrary, in computing an Employee’s Highest Average Annual Pay, the aggregate amount of the Employee’s Basic Compensation and Incentive Pay in excess of the following limits shall not be
taken into account: (i) for Plan Years ending before January 1, 1996, $200,000 (as adjusted for increases in the cost of living pursuant to Section 415(d) of the Code for the year in which the computation of Basic Compensation and
Incentive Pay is being made), (ii) for Plan Years beginning on or after January 1, 1996 and before January 1, 2002, $150,000 (adjusted for increases in the cost of living in accordance with Section 401(a)(17) of the Code), and
(iii) for all Plan Years beginning on or after January 1, 2002, $200,000 (adjusted for increases in the cost of living in accordance with Section 401(a)(17) of the Code). For purposes of the preceding sentence, the limit determined
with respect to clause (i) for the last year for which the computation is made shall be applied for such year and all preceding years. For Plan Years beginning before January 1, 1997, the Basic Compensation and Incentive Pay of an Employee
who is a 5% owner of Commonwealth Edison Company or any Affiliate or one of the ten employees of Commonwealth Edison Company and all Affiliates who was paid the greatest compensation (as defined in Section 415 of the Code) for the Plan Year
shall include the Basic Compensation and Incentive Pay of the Employee’s spouse and any lineal descendants of the Employee who have not attained age 19 before the close of the Plan Year. 

(23) Hour of Service. (a) Each hour for which an Employee is paid, or entitled to payment, for the performance of
duties (such hours to be credited to the Employee for the computation period or periods in which the duties are performed); (b) each hour for which an Employee is paid, or entitled to payment, on account of a period of time during which no
duties are performed (irrespective of whether a Termination of Employment has occurred) due to vacation, holiday, illness, incapacity (including disability), layoff, jury duty, military duty or leave of absence (such hours to be credited to the
Employee for the computation period or periods in which the period of time during which no duties are performed occurs); and (c) each hour for which back pay, irrespective of mitigation of damages, is either awarded or agreed to by an Employer
(such hours to be credited to the Employee for the computation period or periods in which the award or agreement pertains rather than the computation period in which the award, agreement or payment is made). Hours of Service shall be computed in
accordance with paragraphs (b) and (c) of Section 2530.200b-2 of the Department of Labor Regulations. 

  
 -8- 

 (24) Incentive Pay. The payments, if any, earned by the Participant with
respect to each year of Credited Service after 1994, regardless of when paid, under the plans set forth in Exhibit 2 attached hereto. Incentive Pay shall also include with respect to each year of Credited Service commencing after December 31,
2002, lump sum merit increases paid during such year of Credited Service. In the case of a Participant who is absent from employment due to employment by a union that represents any group of Employees, Incentive Pay shall mean, for the period during
which the Participant is absent from employment, the payments the Participant would have received under the applicable plan set forth in Exhibit 2 attached hereto, as determined by the union employing such Participant. 

(25) Investment Office. The Company acting through the Exelon Investment Office. 

(26) Merger Agreement. That Agreement and Plan of Merger, dated as of April 28, 2011, by and among Exelon
Corporation, Bolt Acquisition Corporation and Constellation Energy Group, Inc 
 (27) Military Service. The
performance of duty on a voluntary or involuntary basis in a “uniformed service” (as defined below) under competent authority of the United States government and includes active duty, active duty for training, initial active duty for
training, inactive duty training, full-time National Guard duty, and a period for which a person is absent from employment for the purpose of an examination to determine the fitness of the person to perform any such duty. For purposes of the
preceding sentence, the term “uniformed service” means the Armed Forces, the Army National Guard and the Air National Guard when engaged in active duty for training, inactive duty training, or full-time National Guard duty, the
commissioned corps of the Public Health Service, and any other category of persons designated by the President of the United States in time of war or emergency. 

(28) Normal Retirement Age. A Participant’s 65th birthday. 

(29) Participant. An Employee described in Article 3 (relating to participation). An individual shall cease to be a
Participant upon the date the individual is no longer eligible to receive a benefit from this Plan (including, without limitation, upon his or her receipt of a Special Lump Sum Payment as defined in Section 6.9 (relating to Special Lump Sum
Payment Option)) or upon the individual’s Termination of Employment if the individual has not completed at least five years of Vesting Service upon the date of his or her Termination of Employment and is not otherwise eligible to receive a
benefit from this Plan. 
 (30) Plan. The Plan herein set forth, as from time to time amended, which is part of the
Exelon Corporation Retirement Program. 
 (31) Plan Year. The calendar year. 

  
 -9- 

 (32) Regulations. Written promulgations of the Department of Labor
construing Title I of ERISA or the Internal Revenue Service construing the Code. 
 (33) Retiree. A Participant or
Beneficiary receiving a Service Annuity. 
 (34) Service Annuity. The amount payable to a Retiree from the Service
Annuity Fund under the Plan. Except as otherwise indicated by the context, such term includes an annuity payable pursuant to paragraph (b) of Section 6.1 (relating to annuities payable to married Participants), Section 6.2 (relating
to optional Service Annuity forms), Section 6.3 (relating to surviving spouse annuities, Section 5.6 (relating to Federal Benefit supplemental payments), Section 5.7 (relating to deferred vested termination) and Section 6.4
(relating to a surviving Child annuity). Notwithstanding the foregoing, a Participant shall not be entitled to any amount payable from the Service Annuity Fund under the Plan following the Participant’s receipt of a Special Lump Sum Payment
within the meaning of Section 6.9 (relating to Special Lump Sum Payment Option). 
 (35) Service Annuity Fund.
All money and property of every kind held by the Trustee under the Trust Agreement. 
 (36) Spouse. The individual who
is the husband or wife of a Participant as the result of a legal union between one man and one woman, within the meaning of the Defense of Marriage Act, on the Participant’s Pension Starting Date, or if earlier, on the date of the
Participant’s death. While the Spouse is living and, except as otherwise provided in a qualified domestic relations order as described in paragraph (b) of Section 13.2 (relating to exception to nonassignability in the case of a
qualified domestic relations order) or paragraph (c) of Section 6.6 (relating to automatic cancellation of elections), such Spouse shall be treated as the Participant’s Spouse for all purposes of this Service Annuity System without
regard to whether such Spouse remains married to the Participant after the Participant’s Annuity Starting Date. 
 (37)
Termination of Employment. A Participant’s ceasing to be an Employee of any Employer or any Affiliate. A transfer between employment by an Employer and employment by an Affiliate or between employment by Employers or Affiliates shall not
constitute a Termination of Employment. 
 (38) Total and Permanent Disability. A disability which, in the opinion of
the Administrator, renders the Participant unable to perform the principal duties of the Participant’s regular job classification or such other job classification as may be made available to the Participant by an Employer or an Affiliate and
which results from a cause other than one or more of the following, as determined by the Administrator, in its sole discretion: 

(i) excessive or habitual use of drugs, intoxicants, narcotics or alcohol; 

  
 -10- 

 (ii) injury or disease sustained while participating in illegal activities; or

 (iii) injury or disease sustained while employed by another Employer and arising out of such other employment. 

(39) Trust Agreement. The agreement between the Company and the Trustee governing the Service Annuity Fund. 

(40) Trustee. The trustee of the Service Annuity Fund or, if there shall be more than one trustee acting at any time,
all of such trustees collectively. 
 (41) Vesting Service. The period of an Employee’s employment which is used
to determine whether the Employee is entitled to receive a Service Annuity under Article 5 (relating to Service Annuities). An Employee’s Vesting Service includes (a) the Participant’s vesting service prior to the Effective Date
determined in accordance with the provisions of the Plan as in effect prior to the Effective Date, (b) to the extent not duplicative, for an Employee who terminated prior to January 1, 2003, any additional service for actual employment
credited to such Employee prior to the Effective Date in an Employer’s employment records pursuant to Commonwealth Edison Company’s service bridging policy and (c) the aggregate of the periods beginning on or after the Effective Date
during which the Employee is employed by an Employer or an Affiliate, provided that in the case of an Employee who has no vested right to any benefits under this Plan, such Employee’s periods of Vesting Service before and after a period of
absence from employment shall be aggregated only when the Employee’s number of consecutive one-year periods of absence from employment is less than five and the Employee has at least one year of Vesting Service after such period of absence from
employment. For purposes of the preceding sentence, an Employee shall be deemed to be employed by an Employer or an Affiliate during (a) any period of absence from employment by an Employer or an Affiliate which is of less than twelve
months’ duration, (b) the first twelve months of any period of absence from employment for any reason other than the Employee’s quitting, retiring or being discharged, except as provided in clause (f) below, (c) any period
during which the Employee is in Military Service, provided that the Employee returns to the employ of an Employer or an Affiliate within the period prescribed by laws relating to the reemployment rights of persons in Military Service, (d) any
period, whether less than or greater than twelve months, during which the Participant is employed by a union that represents any group of Employees, (e) the period following Termination of Employment on account of a Total and Permanent
Disability during which the Participant is receiving benefits under any Employer’s long term disability plan and (f) as and to the extent provided by resolutions of the board of directors of the Company, any period of authorized absence
from employment as an Eligible Employee. The Administrator may require certification from an Employee, as a condition of granting Vesting Service under this subdivision (39), that the leave was taken for one of the reasons enumerated in the
preceding sentence. Notwithstanding the preceding sentences, in 

  
 -11- 

 
determining an Employee’s period of absence from employment by an Employer or an Affiliate, the following shall be disregarded: the first twenty-four months of any period of absence from
employment by reason of (i) the Employee’s pregnancy, (ii) the birth of the Employee’s child, (iii) the placement of a child with the Employee in connection with the adoption of such child by such Employee or
(iv) caring for such child for a period beginning immediately following such birth or placement. 
 Section 2.2. Gender and
Plurals. Wherever used in this Plan, words in the masculine gender shall include masculine or feminine gender, and, unless the context otherwise requires, words in the singular shall include the plural, and words in the plural shall include the
singular. 
 Section 2.3. Definition of “Highly Compensated Employee”. Wherever applicable for purposes of satisfying
legal requirements applicable to the Plan, the term “highly compensated employee” shall mean any Employee who performs service in the determination year and who (a) is a 5%-owner (as determined under section 416(i)(1)(A)(iii) of the
Code) at any time during the Plan Year or the preceding Plan Year or (b) both (1) is paid compensation in excess of $80,000 (as adjusted for increases in the cost of living in accordance with section 414(q)(1)(B)(ii) of the Code) from an
Employer for the preceding Plan Year, and (2) is in the group of employees consisting of the top 20% of the employees of the Employer and its Affiliates when ranked on the basis of compensation paid during such preceding Plan Year. 

ARTICLE 3 
 PARTICIPATION 

Section 3.1. Employees Represented by IBEW Local Union 15. Each Eligible Employee who is a member of a collective bargaining unit
represented by IBEW Local Union 15 and who was a Participant in the Plan on December 31, 2000 shall continue to be a Participant as of January 1, 2001. Each other Eligible Employee who is a member of IBEW Local Union 15

  
 -12- 

 
shall become a Participant as of the first day that such Eligible employee completes an Hour of Service with an Employer as an Eligible Employee, provided that such Eligible Employee does not
elect, in the time and manner prescribed by the Administrator for such an election, to participate in the Exelon Corporation Pension Plan for Bargaining Unit Employees. Notwithstanding the foregoing, effective January 1, 2009, an Employee who
is a member of a collective bargaining unit represented by IBEW Local Union 15 and whose first Hour of Service with an Employer is on or after January 1, 2009 shall not be an Eligible Employee and shall not be eligible to become a Participant
at any time. 
 Section 3.2. Management Employees. (a) In General. Each Participant who is not a member of a
collective bargaining unit represented by IBEW Local Union 15 and who is, as of January 1, 2002, an Eligible Employee shall be permitted to elect, in the time and manner prescribed by the ‘Committee’, as such term was defined in the
Plan prior to June 1, 2006, to either (i) continue participating in the Plan on and after January 1, 2002 or (ii) cease participating in the Plan as of December 31, 2001 and begin participating in the Exelon Corporation Cash
Balance Pension Plan as of January 1, 2002. Each Eligible Employee who elects to continue participating in the Plan or who is offered and fails to make any such election shall continue to be a Participant as of January 1, 2002. Each
Eligible Employee who elects to participate in the Exelon Corporation Cash Balance Pension Plan in lieu of participation in this Plan shall cease participation in the Plan as of December 31, 2001 and shall not be entitled to any benefit under
the Plan, unless such Participant receives a notification (the “Notice”) from an Employer that his or her employment with the Employers and their Affiliates will be terminated on or before December 31, 2002 and that such Participant
is eligible for severance benefits under the Exelon Corporation Merger Separation Plan for Designated Management Employees or any other 

  
 -13- 

 
severance plan maintained by an Employer or an Affiliate. An Eligible Employee who receives a Notice shall continue to be a Participant in the Plan until his or her Termination of Employment,
notwithstanding such Eligible Employee’s election to participate in the Exelon Corporation Cash Balance Pension Plan. An Eligible Employee (i) who receives a Notice, but whose employment does not terminate on or before December 31,
2002, or (ii) whose employment terminates before December 31, 2002 without the Employee receiving a Notice shall cease participation in the Plan as of December 31, 2001 if such Employee elects, in the time and manner prescribed by the
‘Committee’, as such term was defined in the Plan prior to June 1, 2006, to participate in the Exelon Corporation Cash Balance Pension Plan. 

Effective as of January 1, 2004, each Eligible Employee (i) who is an employee of the Exelon Power Team, (ii) who, as of
December 31, 2000, was an Employee of Commonwealth Edison Company and is, as of January 1, 2004, an Eligible Employee, (iii) who was, at any time prior to January 1, 2004, a Participant and (iv) who did not previously make a
valid election pursuant to the preceding paragraph shall be permitted to elect, in the time and manner prescribed by the ‘Committee’, as such term was defined in the Plan prior to June 1, 2006, to either (A) resume or continue
participation in the Plan as of January 1, 2004 or (B) participate in the Exelon Corporation Cash Balance Pension Plan as of January 1, 2004. Each such Eligible Employee who affirmatively elects to resume or continue participation in
the Plan in lieu of participation in the Exelon Corporation Cash Balance Pension Plan shall resume or continue participation in this Plan as of January 1, 2004. 

  
 -14- 

 (b) Transfer of Benefits and Assets to Cash Balance Pension Plan. If an Eligible Employee
described in paragraph (a) above elects to participate in the Exelon Corporation Cash Balance Pension Plan in lieu of participating in the Plan, the Employee’s Service Annuity, determined as of December 31, 2001, or December 31,
2003, as the case may be, based on the Employee’s Credited Service and Highest Annual Average Pay as of such date but without giving effect to Section 5.6, shall be transferred to the Exelon Corporation Cash Balance Pension Plan and such
Employee shall not accrue any additional benefit under the Plan. An amount of assets that is equal to the present value of the Participant’s Service Annuity described in the preceding sentence, determined using the methods and assumptions
prescribed by Section 4044 of ERISA, shall also be transferred to the Exelon Corporation Cash Balance Pension Plan. Such transfer of benefits and assets related thereto shall occur as soon as administratively practicable after the Eligible
Employee makes the election described in paragraph (a) above. In the event that an Eligible Employee whose Service Annuity and related assets are transferred to the Exelon Corporation Cash Balance Pension Plan receives a Notice and has a
Termination of Employment on or before December 31, 2002, the Service Annuity and related assets that were transferred to the Exelon Corporation Cash Balance Pension Plan shall be transferred back to the Plan and the amount of the pension
benefit accrued by such Employee during 2002 (if any) shall be determined under the terms of this Plan rather than the Exelon Corporation Cash Balance Pension Plan. Such transfer shall occur as soon as administratively practicable. 

Section 3.3. Cessation of Participation. An individual’s participation in the Plan shall cease upon the date the individual
is no longer eligible to receive a benefit from this Plan or upon the individual’s Termination of Employment if the individual has not completed at least five years of Vesting Service upon the date of his or her Termination of Employment and is
not otherwise eligible to receive a benefit from this Plan. 
 Section 3.4. Certain Rehired Employees. Notwithstanding anything
contained herein to the contrary, no Employee who has received a Special Lump Sum Payment or an Immediately Commencing Annuity in accordance with Section 6.9 (relating to Special Lump Sum Payment Option) shall be eligible to become a
Participant pursuant to this Article 3. 

  
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 ARTICLE 4 

CONTRIBUTIONS 
 Section 4.1.
Amount of Contributions. The Employers intend to make contributions to the Service Annuity Fund of amounts which, in the aggregate over a period of time, are sufficient to finance the benefits provided by the Plan. All such contributions
shall be in such amounts and shall be made in such manner and at such time as the Company shall from time to time determine in accordance with the funding policy it establishes and consistent with minimum funding standards under Section 412 of
the Code. the Company may rely on the advice of actuaries in establishing and carrying out a funding policy. Forfeitures arising under the Plan for any reason shall be applied to reduce the cost of the Plan, not to increase the Service Annuities
payable to Participants, Beneficiaries or Retirees. 
 Section 4.2. Return of Contributions. Any contribution made to the
Service Annuity Fund by an Employer by reason of a good faith mistake of fact, or any contribution made to the Service Annuity Fund by an Employer which exceeds the maximum amount for which a deduction is allowable to the Employer for federal income
tax purposes by reason of a good faith mistake in determining the maximum deductible amount, shall upon the request of the Employer be returned by the Trustee to the Employer. The Employer’s request and the return of any such contribution must
be made within one year after such contribution was mistakenly made or after the deduction of such excess portion of such contribution was disallowed, as the case may be. The amount to be returned to the Employer pursuant to this Section 4.2
shall be the excess of (a) the amount contributed over (b) the amount that would have been contributed had there not been a mistake of fact or a mistake in determining the maximum allowable deduction. Earnings attributable to the amount
contributed by mistake shall not be returned to the Employer, but losses attributable thereto shall reduce the amount so returned. 

  
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 ARTICLE 5 

SERVICE ANNUITIES 

Section 5.1. Description of Service Annuities. Each Participant whose Termination of Employment occurs on or after his or her
Normal Retirement Age shall be entitled to a Service Annuity as described in Section 5.2 (relating to normal and deferred retirement). Each Participant whose Termination of Employment occurs prior to the Participant’s 65th birthday but
after the Participant has completed at least ten years of Credited Service and has attained age 50 shall be entitled to a Service Annuity as described in Section 5.3 (relating to early retirement). Each Participant whose Termination of
Employment occurs on or after the Participant’s 45th birthday on account of a Total and Permanent Disability shall be entitled to a Service Annuity as described in Section 5.4 (relating to disability retirement at or after age 45),
provided such Participant has satisfied the conditions set forth in Section 5.4. Each Participant who has completed at least ten years of Credited Service and whose Termination of Employment occurs prior to the Participant’s 45th birthday
on account of Total and Permanent Disability shall be entitled to a Service Annuity as described in Section 5.5 (relating to disability retirement before age 45), provided such Participant has satisfied the conditions set forth in
Section 5.5. Each Participant whose Termination of Employment occurs after the Participant has completed at least five years of Vesting Service but who is not described in any of the preceding sentences shall be entitled to a Service Annuity
described in Section 5.7 (relating to deferred vested termination). 

  
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 Section 5.2. Normal and Deferred Retirement. (a) In General. Each
Participant whose Termination of Employment occurs on or after the Participant’s Normal Retirement Age shall be entitled, subject to Section 6.1 (relating to the basic Service Annuity form of payment), to receive a Service Annuity payable
in semi-monthly payments for the Participant’s lifetime commencing on the Service Annuity payment date immediately following the day the Participant’s status on the Human Resource system of the Company is changed to “inactive.”
The annual amount of such Service Annuity shall equal, subject to Section 5.8 (relating to special rules for computation of Service Annuities), Section 7.1 (relating to maximum annual benefits) and Section 7.2 (relating to temporary
restrictions on benefits in case of termination or curtailment), the sum of the amounts described in subparagraphs (A), (B) and (C) below: 

(A) 1.25% of the Participant’s Earnings, reduced by 25% (less 1% for each year, if any, by which the Participant’s
years of Credited Service as of December 25, 1994 are less than 35, computed to the nearest full year) of the Participant’s Federal Benefit, determined as of December 25, 1994. 

(B) 1.60% (1.62% for Participants who terminate employment on or after October 1, 2008 and were a member of a collective
bargaining unit represented by IBEW Local Union 15 immediately prior to termination of employment) of the Participant’s Highest Average Annual Pay, multiplied by the number of years of the Participant’s Credited Service (not in excess of
40 years). 
 (C) 0.5% of the Participant’s Highest Average Annual Pay, multiplied by the number of years, if any, by
which the Participant’s years of Credited Service (not in excess of 40) exceed the limitation on the number of years of Credited Service taken into account under subparagraph (B) of paragraph (a) of this Section 5.2. 

Notwithstanding the preceding, the annual amount of the Service Annuity for a Participant who has at least 10 years of Credited Service shall
not be less than the applicable amount stated in Table A. 

  
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 (b) Special Rule for Participants Who Attain Age 70- 1⁄2 While Employed. If a Participant remains employed by an Employer or an Affiliate beyond April 1 of the year following the year in which the
Participant attains age 70- 1⁄2, distribution of such Participant’s Service Annuity (i) shall commence, in
the case of a Participant who is a 5-percent owner as defined in Section 416(i) of the Code, or (ii) may commence, upon any other such Employee’s election, in either case, not later than April 1 next following the calendar year
in which the Participant attains age 70- 1⁄2. 

The annual amount of the Participant’s Service Annuity that commences under the preceding paragraph shall be recomputed pursuant to this
Section 5.1 (relating to normal and deferred retirement) as of each succeeding April 1 to reflect any increase in the Participant’s Credited Service and Highest Average Annual Pay attributable to the Participant’s employment
since the preceding April 1. 
 Notwithstanding anything in the Plan to the contrary, the form and timing of all distributions under
the Plan to any Participant shall be in accordance with Section 401(a)(9) of the Code and regulations issued thereunder, including the incidental death benefit requirements of Section 401(a)(9)(G) of the Code and Treasury Regulation
§1.401(a)(9)-2 through Treasury Regulation §1.401(a)(9)-9. 
 (c) Basic Compensation
for Participant with Total and Permanent Disability. In the case of a Participant whose Termination of Employment is on account of a Total and Permanent Disability and who is entitled to a Service Annuity under either paragraph (b) of
Section 5.4 (relating to disability retirement at or after age 45 for management Employees ) or paragraph (b) of Section 5.5 (relating to disability retirement before age 45 for management Employees), Basic Compensation shall mean,
for the period following the Participant’s 

  
 -19- 

 
Termination of Employment and during which the Participant is receiving benefits under any Employer’s long term disability plan, the Participant’s base pay rate per pay period in effect
immediately preceding the first day of the Participant’s absence due to such Total and Permanent Disability increased each October 1 following the Participant’s Termination of Employment at a rate equal to the cost of living
adjustment described in the following sentence. For purposes of the preceding sentence, the cost of living adjustment shall equal, for each October 1, the percentage by which the Consumer Price Index for the July immediately preceding such
October 1 exceeds the Consumer Price Index for the July immediately preceding the twelve month period beginning October 1 in which the Participant’s Termination of Employment occurred; provided, however, that: 

(i) If, as of such October 1, there shall be no such excess, the adjustment percentage shall be deemed to be zero for the
twelve-month period beginning on such October 1. 
 (ii) There shall be no negative adjustment percentage. 

(iii) The aggregate adjustment percentage for any twelve-month period beginning October 1 shall never be lower than the
aggregate adjustment percentage for the preceding such period. 
 (iv) If the percentage increase in the Consumer Price Index
computed for the twelve-month period beginning on October 1 does not exceed the aggregate adjustment percentage for the preceding twelve-month period by at least three percentage points, the aggregate adjustment percentage for the preceding
twelve-month period shall continue in effect during such twelve-month period beginning on October 1. 
 (v) The
aggregate adjustment percentage for any twelve-month period beginning on October 1 shall not be more than seven percentage points greater than that for the preceding twelve-month period. If the aggregate adjustment percentage for any
twelve-month period beginning on October 1 exceeds by more than seven percentage points the aggregate adjustment percentage for the preceding twelve-month period, the excess shall be carried over to succeeding twelve-month periods until such
excess is reduced to zero. 

  
 -20- 

 (vi) The adjustment percentage for the twelve-month period beginning with the
October 1 next following the date the Participant’s Termination of Employment occurs shall be the adjustment percentage determined in accordance with the preceding provisions of this Section 5.2(c) multiplied by a fraction the
numerator of which shall be the number of full calendar months between such date and such October 1 and the denominator of which shall be twelve. 

The adjustment described in this Section 5.2(c) shall continue to be made unless and until the Participant ceases to be eligible to receive benefits
under any Employer’s long term disability plan. Notwithstanding the preceding sentence, if a Participant returns to employment with any Employer and ceases to be eligible to receive benefits under any Employer’s long term disability plan
but again becomes eligible to receive such benefits as a continuation of the same Total and Permanent Disability, as determined under the provisions, or interpretations, of the Employer’s long term disability plan, the adjustments described in
this Section 5.2(c) shall continue to be made as though the Participant had never ceased to be eligible for such benefits, provided that an adjustment shall be made for any earnings received by the Participant while the Participant was employed
by any Employer. 
 Section 5.3. Early Retirement. Each Participant whose Termination of Employment occurs prior to the
Participant’s 65th birthday but after the Participant has completed at least ten years of Credited Service and has attained age 50 shall be entitled to elect, subject to Section 6.1
(relating to the basic Service Annuity form of payment), to receive an early retirement Service Annuity payable in semi-monthly payments for the Participant’s lifetime commencing no earlier than the Service Annuity payment date immediately
following the day the Participant’s status on the Human Resource system of the Company is changed to “inactive” and no later than the Service Annuity payment date coinciding with or immediately following the date the Participant
attains age 65. The annual amount of such early retirement Service Annuity shall, subject to Section 5.8 (relating to special rules for computation of Service Annuities), Section 7.1 (relating to maximum annual benefits) and
Section 7.2 (relating to temporary 

  
 -21- 

 
restrictions on benefits in the case of termination or curtailment) be the amount computed pursuant to Section 5.2 (relating to normal and deferred retirement) multiplied by the applicable
factor (determined with reference to the Participant’s attained age at the time benefits commence to be paid) from (a) with respect to any Participant who is not a member of IBEW Local Union 15, Table B, and (b) with respect to any
Participant who is a member of IBEW Local Union 15, Table B-1. 
 Section 5.4. Disability Retirement at or After Age 45.
(a) Rules Applicable to Union Employees. Each Eligible Participant (as defined in the following paragraph) whose Termination of Employment occurs on or after the Eligible Participant’s 45th birthday on account of a Total and
Permanent Disability and who is not then eligible for a Service Annuity under Section 5.2 (relating to normal and deferred retirement) or Section 5.3 (relating to early retirement) shall be entitled to elect, subject to Section 6.1
(relating to the basic Service Annuity form of payment), without regard to the number of the Eligible Participant’s years of Credited Service, to receive a disability Service Annuity payable in semi-monthly payments for the Eligible
Participant’s lifetime commencing no earlier than the Service Annuity payment date immediately following the day the Eligible Participant’s status on the Human Resource system of the Company is changed to “inactive” and no later
than the Service Annuity payment date coinciding with or immediately following the date the Eligible Participant attains age 65. The annual amount of such disability Service Annuity shall, subject to Section 5.8 (relating to special rules for
computation of Service Annuities), Section 7.1 (relating to maximum annual benefits) and Section 7.2 (relating to temporary restrictions on benefits in case of termination or curtailment), be the amount computed pursuant to
Section 5.3 (relating to early retirement), except that if the Eligible Participant’s employment terminated on account of a Total and Permanent Disability prior to the Eligible Participant’s 55th birthday, the Eligible Participant
shall be treated as though he or she attained age 55 for purposes of determining the applicable factor from Table B. 

  
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 For purposes of this Section 5.4, an “Eligible Participant” shall mean a
Participant who, at the time the Participant’s employment terminates, is a member of Local Union 15, International Brotherhood of Electrical Workers. 

(b) Rules Applicable to Management Employees. Each Participant who is a management Employee, whose Termination of Employment occurs on
or after the Participant’s 45th birthday on account of a Total and Permanent Disability and who is not then eligible for a Service Annuity under Section 5.2 (relating to normal and deferred retirement) or Section 5.3 (relating to
early retirement) shall be entitled to elect, subject to Section 6.1 (relating to the basic Service Annuity form of payment), without regard to the number of the Participant’s years of Credited Service, to receive a disability Service
Annuity payable in semi-monthly payments for the Participant’s lifetime commencing no earlier than the Service Annuity payment date immediately following the day the Participant’s status on the Human Resource system of the Company is
changed to “inactive”, provided that such Participant (i) shall have qualified for and received long-term disability benefits under the Exelon Corporation Disability Benefit Plan for Management Employees (the “LTD Plan”),
(ii) shall be eligible to receive Social Security benefits on account of such disability and (iii) shall no longer be eligible to receive benefits under the LTD Plan because such benefits have been exhausted. In no event shall the
semi-monthly payments described in the preceding sentence commence later than the later of (a) the Service Annuity payment date coinciding with or immediately following the date the Participant attains age 65 and (b) the date the
Participant ceases to be eligible to receive benefits under the 

  
 -23- 

 
LTD Plan because such benefits have been exhausted. The annual amount of such disability Service Annuity shall, subject to Section 5.8 (relating to special rules for computation of Service
Annuities), Section 7.1 (relating to maximum annual benefits) and Section 7.2 (relating to temporary restrictions on benefits in case of termination or curtailment), be the amount computed pursuant to Section 5.3 (relating to early
retirement), except that if the Participant’s employment terminated on account of a Total and Permanent Disability prior to the Participant’s 55th birthday, the Participant shall be treated as though he or she attained age 55 for purposes
of determining the applicable factor from Table B. 
 Section 5.5. Disability Retirement Before Age 45. (a) Rules
Applicable to Union Employees. Each Eligible Participant (as defined in the following paragraph) who has completed at least 10 years of Credited Service and whose Termination of Employment occurs prior to the Eligible Participant’s 45th
birthday on account of a Total and Permanent Disability shall be entitled to elect, subject to Section 6.1 (relating to the basic Service Annuity form of payment), to receive a reduced disability Service Annuity payable in semi-monthly payments
for the Eligible Participant’s lifetime commencing no earlier than the Service Annuity payment date immediately following the day the Eligible Participant’s status on the Human Resource system of the Company is changed to
“inactive” and no later than the Service Annuity payment date coinciding with or immediately following the date the Eligible Participant attains age 65. The annual amount of such reduced disability Service Annuity shall, subject to
Section 5.8 (relating to special rules for computation of Service Annuities), Section 7.1 (relating to maximum annual benefits) and Section 7.2 (relating to temporary restrictions on benefits in case of termination or curtailment), be
the sum of (a) the amount computed pursuant to Section 5.4 (relating to disability retirement at or after age 45) plus (b) the excess, if any, of (i) 25% of the Eligible 

  
 -24- 

 
Participant’s Highest Average Annual Pay over (ii) the sum of the annual amount computed under Section 5.4 (relating to disability retirement at or after age 45) plus the aggregate
annual amount of the Federal Benefit supplemental payments payable to such Eligible Participant pursuant to Section 5.6 (relating to the Federal Benefit supplemental payments). 

For purposes of this Section 5.5, an “Eligible Participant” shall mean a Participant who, at the time the Participant’s
employment terminates, is a member of Local Union 15, International Brotherhood of Electrical Workers. 
 (b) Rules Applicable to
Management Employees. Each Participant who is a management Employee, who has completed at least 10 years of Credited Service and whose Termination of Employment occurs prior to the Participant’s 45th birthday on account of a Total and
Permanent Disability shall be entitled to elect, subject to Section 6.1 (relating to the basic Service Annuity form of payment), to receive a reduced disability Service Annuity payable in semi-monthly payments for the Participant’s
lifetime commencing no earlier than the Service Annuity payment date immediately following the day the Participant’s status on the Human Resource system of the Company is changed to “inactive” and no later than the Service Annuity
payment date coinciding with or immediately following the date the Participant attains age 65 provided, that such Participant (i) shall have qualified for and received long-term disability benefits under the LTD Plan, (ii) shall be
eligible to receive Social Security benefits on account of such disability and (iii) shall no longer be eligible to receive benefits under the LTD Plan because such benefits have been exhausted. The annual amount of such reduced disability
Service Annuity shall, subject to Section 5.8 (relating to special rules for computation of Service Annuities), Section 7.1 (relating to maximum annual benefits) and Section 7.2 (relating to temporary restrictions on benefits in case
of termination or curtailment), be the sum of (a) the 

  
 -25- 

 
amount computed pursuant to Section 5.4 (relating to disability retirement at or after age 45) plus (b) the excess, if any, of (i) 25% of the Participant’s Highest Average
Annual Pay over (ii) the sum of the annual amount computed under Section 5.4 (relating to disability retirement at or after age 45) plus the aggregate annual amount of the Federal Benefit supplemental payments payable to such Participant
pursuant to Section 5.6 (relating to the Federal Benefit supplemental payments). 
 Section 5.6. Federal Benefit Supplemental
Payments Prior to Age 65. Each Participant whose Service Annuity is computed pursuant to Section 5.3 (relating to early retirement), Section 5.4 (relating to disability retirement at or after age 45) or Section 5.5 (relating to
disability retirement before age 45) and which commences prior to the Participant’s attainment of age 65 shall receive supplemental monthly payments each in an amount equal to 80% of the amount of the Participant’s monthly Federal Benefit
and, except in the case of a Participant whose Service Annuity is computed under Section 5.5 (relating to disability retirement before age 45), shall have his or her Service Annuity reduced by an amount equal to the product of (a) the
aggregate annual amount of such supplemental monthly payments multiplied by (b) the applicable factor (determined with reference to the Participant’s attained age at the time benefits commence to be paid) from (i) with respect to any
Participant who is not a member of IBEW Local Union 15, Table B-2, and (ii) with respect to any Participant who is a member of IBEW Local Union 15, Table B-3. 

Section 5.7. Deferred Vested Termination. Each Participant whose Termination of Employment occurs after the Participant has
completed at least five years of Vesting Service and who is not then eligible for a Service Annuity under Section 5.2 (relating to normal and deferred retirement), Section 5.3 (relating to early retirement), Section 5.4 (relating to
disability 

  
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retirement at or after age 45) or Section 5.5 (relating to disability retirement before age 45) shall be entitled, subject to Section 6.1 (relating to the basic Service Annuity form of
payment), to receive a deferred Service Annuity payable in semi-monthly payments for the Participant’s lifetime commencing as soon as practicable after the date elected, in the manner prescribed by the Administrator, by the Participant but not
earlier than the later of (i) the day the Participant’s status on the Human Resource system of the Company is changed to “inactive” and (ii) the Participant’s 60th birthday or, in the case of a Participant who completed
at least ten years of Credited Service, the Participant’s 50th birthday. The annual amount of such deferred Service Annuity shall, subject to Section 5.8 (relating to special rules for computation of Service Annuities), Section 7.1
(relating to maximum annual benefits) and Section 7.2 (relating to temporary restrictions on benefits in case of termination or curtailment), be the amount computed under Section 5.2 (relating to normal and deferred retirement) multiplied
by the applicable factor from Table F to reflect the Participant’s age, if less than 65, at the date upon which payment of the Participant’s deferred Service Annuity commences. In no event shall a Participant’s election hereunder to
begin receiving payment of his or her Service Annuity permit such payments to begin later than April 1 of the calendar year following the calendar year in which the Participant attains age 70- 1⁄2. Notwithstanding anything herein to the contrary, if a Participant entitled to a deferred Service Annuity under this Section 5.7 fails to make an election
to begin receiving his or her deferred Service Annuity, payment of the Participant’s Service Annuity shall commence no later than 60 days following the Plan Year in which the Participant attains age 65. 

  
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 Each Participant whose employment is terminated before the Participant completes at least five
years of Vesting Service and who is not then eligible for a Service Annuity under Section 5.2 (relating to normal and deferred retirement), Section 5.3 (relating to early retirement), Section 5.4 (relating to disability retirement at
or after age 45) or Section 5.5 (relating to disability retirement before age 45) shall be entitled to no benefits whatsoever under this Plan. Such a Participant’s vested interest in his or her benefit under the Plan shall have a value of
zero and such Participant shall be deemed to receive immediately upon the Participant’s Termination of Employment a lump sum distribution of such vested interest and concurrent therewith the Participant shall forfeit his or her accrued benefit
under the Plan. 
 Section 5.8. Special Rules Applicable to the Computation of Service Annuities. (a) Minimum Normal,
Early Retirement and Deferred Vested Termination Benefits. The Service Annuity to which a Participant is entitled under Section 5.2 (relating to normal or deferred retirement) or Section 5.3 (relating to early retirement) shall in no
event be less than the hypothetical Service Annuity which the Participant would have been entitled to receive had the Participant retired under Section 5.3 (relating to early retirement) at any time prior to the Participant’s actual date
of retirement and elected to have such hypothetical Service Annuity commence on the Participant’s hypothetical early retirement date; provided, however, that any difference between such Service Annuities which is attributable to
an increase in the amount of the Participant’s Federal Benefit due to changes in the Federal Social Security Act between such hypothetical early retirement date and the Participant’s date of retirement shall be disregarded. 

(b) Termination of Employment During Authorized Absence. In computing the annual amount of the Service Annuity pursuant to
Section 5.2 (relating to normal and deferred retirement), Section 5.3 (relating to early retirement), Section 5.4 (relating to disability retirement at or after age 45) or Section 5.5 (relating to deferred vested termination) for
a Participant whose Termination of Employment occurs during an authorized absence from employment which is included in the Participant’s years of Credited Service pursuant to 

  
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subdivision (12) of Section 2.1 (relating to the definition of Credited Service), such Participant shall be considered to have terminated employment on the earliest of (i) the date
the authorized absence ends, (ii) the date that is twelve months after the day the authorized absence began and (iii) the date of the Participant’s Termination of Service. 

(c) Service Annuities Based on Compensation In Excess of the Section 401(a)(17) Limits. In the case of a Participant whose Service
Annuity was computed under this Article 5 as of the last day of any Plan Year (the “grandfather date”) prior to the January 1, 1989 effective date of Section 401(a)(17) of the Code, which sets forth a compensation limit, or prior
to the January 1, 1996 effective date of the reduction in the compensation limit set forth in Section 401(a)(17) of the Code (the applicable limit being referred to as the “new compensation limit”), based on Earnings or the
aggregate amount of Base Pay and Incentive Pay in excess of the new compensation limit, such Participant’s Service Annuity under this Article 5 (relating to Service Annuities) for periods after the applicable grandfather date shall be the
greater of: 
 (i) the sum of (a) the Participant’s Service Annuity determined as of such grandfather date, plus
(b) the Participant’s Service Annuity determined after such date by applying the new compensation limit and based only on the Participant’s years of Credited Service after such date; and 

(ii) the Service Annuity determined after the grandfather date by applying the new compensation limit and based on all of the
Participant’s years of Credited Service. 
 (d) Participants Formerly Employed at the Company’s Fossil-Fired Generation
Facilities. 
 (i) Participants entitled to a Service Annuity Under Section 5.7. Notwithstanding anything
contained in the Plan to the contrary, a “Terminated Participant” (as defined below) who, but for this subparagraph (i) of Section 5.8(d), would have his or her Service Annuity computed under Section 5.7 (relating to
Deferred Vested Termination), shall have his or her Service Annuity computed under (a) Section 5.2 (relating to normal and deferred retirement) if the Participant is at least age 65 on the date his or her Service Annuity payments commence
or (b) Section 5.3 (relating to early retirement) if the Participant is at 

  
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least age 50, but not yet age 65, on the date his or her Service Annuity payments commence, in either case, treating the Participant (solely for purposes of Section 5.2 or 5.3, as the case
may be, but not for any other purpose) as though his or her Termination of Employment occurred on the day immediately preceding the date that such Participant’s Service Annuity payments commence; provided, however, that such Participant’s
Service Annuity shall be computed taking into account his Highest Average Annual Pay and Credited Service determined as of the date of his actual Termination of Employment. For purposes of the preceding sentence, a “Terminated Participant”
shall mean a Participant whose Termination of Employment with the Company occurs as a result of the sale of any of the assets sold as part of a divestiture process commencing in 1998 of the Company’s fossil-fired generation facilities to one or
more purchasers, provided that, on the “Determination Date” (defined in subparagraph (iii) below), (a) the sum of such Participant’s years of age and years of Credited Service, including as Credited Service any period
between the Participant’s actual Termination of Employment date and the “Determination Date” (defined in subparagraph (iii) below) equals or exceeds 60 and (b) such Participant is not then eligible for a Service Annuity
under Section 5.2 (relating to normal and deferred retirement) or Section 5.3 (relating to early retirement). 

(ii) “Determination Date” Used to Determine Eligibility for a Service Annuity Under Section 5.3. Further
notwithstanding anything contained herein to the contrary, for purposes of determining whether an “Eligible Participant” (as defined below) is entitled to a Service Annuity under Section 5.3 (relating to early retirement), such
Eligible Participant shall be treated (solely for purposes of Section 5.3) as though his or her Termination of Employment occurred on the “Determination Date” (defined in subparagraph (iii) below). For purposes of the preceding
sentence, an “Eligible Participant” shall mean a Participant whose Termination of Employment occurs as a result of the sale of any of the assets sold as part of a divestiture process commencing in 1998 of the Company’s fossil-fired
generation facilities to one or more purchasers, provided that, on the “Determination Date” (defined in subparagraph (iii) below), such Participant (a) has attained at least age 50 and (b) has at least ten years of Credited
Service, including as Credited Service any period between the Participant’s actual Termination of Employment date and the “Determination Date” (defined in subparagraph (iii) below). 

(iii) Definition of Determination Date. For purposes of this Section 5.8(d), the “Determination Date”
shall mean the later of the date on which the transfer of ownership of all FGG assets offered as part of a sale process commencing in 1998 has been completed or the date any remaining FGG assets have been removed by the Company from such sale
process. 
 (iv) As required under Section 5.5(b)(i) of that certain Asset Sale Agreement By and Between Commonwealth
Edison Company and Edison Mission Energy as to Fossil Fuel Generating Assets dated as of March 22, 1999, (A) the benefits payable under the Plan to any Participant who becomes employed 

  
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by Edison Mission Energy or any subsidiary thereof on the date the transactions contemplated by that Agreement are consummated (a “Transferred Participant”) shall be fully vested and
nonforfeitable, effective as of the Determination Date (as defined in subparagraph (iii), above), and (B) no Transferred Participant shall accrue additional benefits under the Plan after the Determination Date, or, if later, the date of such
Transferred Participant’s Termination of Employment. 
 (e) Rehired Participants. Notwithstanding anything contained herein to
the contrary, if a Participant terminates employment and is reemployed as an Employee under circumstances that satisfy the applicable conditions for continuation of payment of retirement benefits set forth in the Company’s policy regarding the
rehiring of retirees, including that the Participant waives participation in, or additional benefits and accruals under the Plan, such Participant’s Service Annuity shall be computed by excluding all service completed, and compensation earned,
during such period of reemployment. 
 (f) Participant’s Death During Qualified Military Service. Effective January 1,
2007, in the case of a Participant who dies while performing Military Service, the Beneficiaries of such Participant shall be entitled to any additional benefits, if any (other than benefit accruals relating to the period of Military Service),
provided under the Plan had the Participant resumed employment with an Employer and then terminated such employment on account of such Participant’s death. 

Section 5.9. Post Retirement Adjustments. The annual Service Annuity payable pursuant to this Article 5 (relating to Service
Annuities) and Article 6 (relating to Service Annuity forms) that commences by reason of (a) the Termination of Employment of a Participant after the Effective Date under circumstances that entitle the Participant to a Service Annuity under
Section 5.2 (relating to normal and deferred retirement), Section 5.3 (relating to early retirement), Section 5.4 (relating to disability retirement at or after age 45), Section 5.5 (relating to disability retirement before age
45) or Section 5.7 (relating to deferred vested terminations), or 

  
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(b) the Termination of Employment of the Participant after the Effective Date by reason of the Participant’s death shall, subject to the limitations set forth in this Section 5.9,
be adjusted each October 1 for the twelve-month period then beginning by adding a post-retirement cost of living adjustment computed by applying an adjustment percentage to the appropriate base specified in this Section 5.9. 

(a) The adjustment percentage shall equal, for each October 1, the percentage by which the Consumer Price Index for the July immediately
preceding such October 1 exceeds the Consumer Price Index for the July immediately preceding the twelve-month period beginning October 1 in which the Participant terminated employment under circumstances described in the first sentence of
this Section 5.9 or payment of a Service Annuity commenced; provided, however, that: 
 (i) If, as of such
October 1, there shall be no such excess, the adjustment percentage shall be deemed to be zero for the twelve-month period beginning on such October 1. 

(ii) There shall be no negative adjustment percentage. 

(iii) The aggregate adjustment percentage for any twelve-month period beginning October 1 shall never be lower than the
aggregate adjustment percentage for the preceding such period. 
 (iv) If the percentage increase in the Consumer Price Index
computed for the twelve-month period beginning on October 1 does not exceed the aggregate adjustment percentage for the preceding twelve-month period by at least three percentage points, the aggregate adjustment percentage for the preceding
twelve-month period shall continue in effect during such twelve-month period beginning on October 1. 
 (v) The
aggregate adjustment percentage for any twelve-month period beginning on October 1 shall not be more than seven percentage points greater than that for the preceding twelve-month period. If the aggregate adjustment percentage for any
twelve-month period beginning on October 1 exceeds by more than seven percentage points the aggregate adjustment percentage for the preceding twelve-month period, the excess shall be carried over to succeeding twelve-month periods until such
excess is reduced to zero. 

  
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 (vi) The adjustment percentage for the twelve-month period beginning with the
October 1 next following the date the Participant’s Service Annuity commences shall be the adjustment percentage determined in accordance with the preceding provisions of this Section 5.9 multiplied by a fraction the numerator of
which shall be the number of full calendar months between such date and such October 1 and the denominator of which shall be twelve. 

(b) To determine the amount of the monthly cost of living adjustment made after the Effective Date with respect to any employee who, on the
date of his or her Termination of Employment is a member of IBEW Local Union 15, in the case of a Service Annuity payable to a Participant pursuant to this Article 5 (relating to Service Annuities) or Article 6 (relating to Service Annuity forms),
the adjustment percentage shall be applied to the first $500 per month (effective December 1, 2000 for each Participant who is a member of IBEW Local Union 15, $1,000 per month) of his or her Service Annuity, computed pursuant to this Article 5
(relating to Service Annuities), subject to a maximum monthly adjustment of $1,000 or, if the monthly amount of such Service Annuity is less than $1,000 per month, subject to a maximum monthly adjustment equal to the monthly Service Annuity payment.
To determine the amount of the adjustment made after the Effective Date in the case of a marital annuity under paragraph (b) of Section 6.1 or under Section 6.2 or surviving spouse annuity payable pursuant to Section 6.3 to the
surviving Spouse of a deceased Participant, a family annuity payable pursuant to Section 6.2 to a surviving Dependent Minor Child or Children of a deceased Participant or a surviving dependent’s annuity payable pursuant to Section 6.4
to a surviving Dependent Disabled Child or Children of a deceased Participant, the adjustment percentage shall be applied to the first $250 per month of such annuity or benefit, subject to a maximum monthly adjustment of $350 ($500 in the case of a
marital annuity under paragraph (b) of Section 6.1 or under Section 6.2) or, if the monthly amount of such annuity or benefit is less than $350 ($500 in the case of marital annuity under paragraph (b) of Section 6.1 or under
Section 6.2), subject to a maximum monthly 

  
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adjustment equal to the monthly Service Annuity payment. Cost of living adjustments with respect to Service Annuities not described in the first sentence of this Section 5.9(a) shall be
determined under the terms of the Plan as in effect at the time the adjustment was made. Notwithstanding anything herein to the contrary, the cost of living adjustments provided under this Section 5.9(a) may be the subject of bargaining between
Commonwealth Edison Company and IBEW Local Union 15 beginning no earlier than the date negotiations commence regarding the successor agreement to the first collective bargaining agreement between the parties that expires on or after January 1,
2006. 
 (c) To determine the amount of the monthly cost of living adjustment made after the Effective Date with respect to any employee who
is not described in paragraph (b), above, to in the case of a Service Annuity payable to a Participant pursuant to this Article 5 (relating to Service Annuities) or Article 6 (relating to Service Annuity forms), the adjustment percentage shall be
applied to the first $500 per month of his or her Service Annuity, computed pursuant to this Article 5 (relating to Service Annuities), subject to a maximum monthly adjustment of $500 or, if the monthly amount of such Service Annuity is less than
$500 per month, subject to a maximum monthly adjustment equal to the monthly Service Annuity payment. To determine the amount of the adjustment made after the Effective Date in the case of a marital annuity under paragraph (b) of
Section 6.1 or under Section 6.2 or surviving spouse annuity payable pursuant to Section 6.3 to the surviving Spouse of a deceased Participant, a family annuity payable pursuant to Section 6.2 to a surviving Dependent Minor Child
or Children of a deceased Participant or a surviving dependent’s annuity payable pursuant to Section 6.4 to a surviving Dependent Disabled Child or Children of a deceased Participant, the adjustment percentage shall be applied to the first
$250 per month of such annuity or benefit, subject to a maximum monthly 

  
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adjustment of $175 ($250 in the case of a marital annuity under paragraph (b) of Section 6.1 or under Section 6.2) or, if the monthly amount of such annuity or benefit is less than
$175 ($250 in the case of marital annuity under paragraph (b) of Section 6.1 or under Section 6.2), subject to a maximum monthly adjustment equal to the monthly Service Annuity payment. Cost of living adjustments with respect to
Service Annuities not described in the first sentence of this Section 5.9(a) shall be determined under the terms of the Plan as in effect at the time the adjustment was made. 

ARTICLE 6 
 SERVICE ANNUITY FORMS

 Section 6.1. Basic Service Annuity Form. (a) Unmarried Participants. A Participant who on his or her Annuity
Starting Date is not married shall receive a Service Annuity payable in semi-monthly payments for the Participant’s lifetime unless the Participant is eligible for and elects an optional form of Service Annuity under Section 6.2 (relating
to optional Service Annuity forms) at the time and in the manner prescribed by paragraph (b) of Section 6.6 (relating to election of optional form of Service Annuity). 

(b) Married Participants. A Participant who is married on his or her Annuity Starting Date and does not elect an optional form of
Service Annuity under Section 6.2 (relating to optional Service Annuity forms) at the time and in the manner prescribed in paragraph (b) of Section 6.6 (relating to election of optional form of Service Annuity) shall receive in lieu
of a Service Annuity payable in semi-monthly payments for the Participant’s lifetime an annual marital annuity payable in semi-monthly payments for the Participant’s lifetime equal to the Participant’s annual Service Annuity computed
pursuant to Article 5 (relating to Service Annuities) reduced by the product of (1) 50% of the annual amount of Service Annuity the 

  
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Participant would have received under Article 5 (relating to Service Annuities) multiplied by (2) 40% of the applicable factor set forth in Table D. Thereafter, if the Participant’s
Spouse shall survive the Participant, such Spouse shall receive during the remainder of the Spouse’s lifetime an annual Service Annuity payable in semi-monthly payments equal to 50% of the annual amount of Service Annuity the Participant would
have received under Article 5 (relating to Service Annuities) if the Participant’s Service Annuity were payable in semi-monthly payments for the Participant’s lifetime. 

Section 6.2. Optional Service Annuity Forms. Upon written request to the Administrator made at the time and in the manner
prescribed in paragraph (b) of Section 6.6 (relating to election of optional form of Service Annuity), a Participant may elect to receive, in lieu of the basic Service Annuity form described in Section 6.1, a Service Annuity in one of
the following optional forms, provided that the Participant is eligible therefor: 
 Service Annuity Payable for the Life
of the Participant: A Participant who is married on the Participant’s Annuity Starting Date may elect, with spousal consent, to receive, in lieu of the marital annuity described in paragraph (b) of Section 6.1 (relating to
annuities payable to married Participants), a Service Annuity payable in semi-monthly payments for the Participant’s lifetime. 

Optional Marital Annuity: A Participant who is married on the Participant’s Annuity Starting Date may elect to
receive a marital annuity described in paragraph (b) of Section 6.1 (relating to annuities payable to married Participants) with a Service Annuity payable to the Participant’s Spouse, if the Participant predeceases such Spouse, of a
percentage less than 50 of the Service Annuity the Participant would have received under Article 5 (relating to Service Annuities) if the Participant’s Service Annuity were payable in semi-monthly payments for the Participant’s lifetime. A
marital annuity described in this Section 6.2 shall be payable at the same time and in the same manner as described in paragraph (b) of Section 6.1 (relating to annuities payable to married Participants) and shall be computed in the
same manner as described in paragraph (b) of Section 6.1 (relating to annuities payable to married Participants), except that the lesser percentage of Service Annuity designated by the Participant shall be used. 

  
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 75% Marital Annuity: A Participant who is married on the
Participant’s Annuity Starting Date may elect to receive a 75% marital annuity with a Service Annuity payable to the Participant’s Spouse, if the Participant predeceases such Spouse, of a percentage equal to 75 of the Service Annuity the
Participant would have received under Article 5 (relating to Service Annuities) if the Participant’s Service Annuity were payable in semi-monthly payments for the Participant’s lifetime. A 75% marital annuity described in this
Section 6.2 shall be payable at the same time and in the same manner as described in paragraph (b) of Section 6.1 (relating to annuities payable to married Participants) and shall be the actuarial equivalent of the Service Annuity the
Participant would have received under Article 5 (relating to Service Annuities), determined by using the annual interest rate specified under section 417(e) of the Code for the November preceding the calendar year in which such distribution is made
or commences, and the mortality table prescribed for purposes of section 417(e)(3)(A)(ii)(I) of the Code. 
 Family
Annuity: A Participant who is not married on the Participant’s Annuity Starting Date and who, as of such date, has a Dependent Minor Child or Dependent Minor Children may elect to receive a family annuity payable in semi-monthly payments
for the Participant’s lifetime and, thereafter, payable in semi-monthly payments in equal shares to each of the Participant’s Dependent Minor Children who have not yet attained age 21. The annual amount of the family annuity payable to the
Participant shall be the Participant’s annual Service Annuity computed pursuant to Article 5 (relating to Service Annuities), reduced by the product of (1) the annual amount of the family annuity designated by the Participant for the
Participant’s surviving Dependent Minor Child or Children which amount shall be a percentage, not to exceed 50, of the annual amount of the Participant’s Service Annuity computed pursuant to Article 5 (relating to Service Annuities)
multiplied by (2) the applicable factor set forth in Table E. The annual amount of the family annuity payable after the Participant’s death to the Participant’s Dependent Minor Child or Children who have not yet attained age 21 shall
equal the percentage designated by the Participant, not to exceed 50, of the annual amount of the Participant’s Service Annuity computed pursuant to Article 5 (relating to Service Annuities). 

Surviving Dependent’s Annuity: A Participant who is not married on the Participant’s Annuity Starting Date and
who, as of such date, has a Dependent Disabled Child or Dependent Disabled Children may elect to receive a surviving dependent’s annuity payable in semi-monthly payments for the Participant’s lifetime and, thereafter, payable in
semi-monthly payments in equal shares to each of the Participant’s Dependent Disabled Children who remain disabled. The annual amount of the surviving dependent’s annuity payable to the Participant shall be the Participant’s annual
Service Annuity computed pursuant to Article 5 (relating to Service Annuities) reduced by the product of (1) the annual amount of the surviving dependent’s annuity designated by the Participant for the Participant’s Dependent Disabled
Child or Children, which amount shall be a percentage, not to exceed 50, of the annual amount of the Participant’s Service Annuity computed pursuant to Article 5 multiplied by (2) 50% of the applicable

  
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factor set forth in Table D, such factor to be determined based on the age of the other parent of such Child or Children, at the Participant’s Annuity Starting Date or the age such other
parent would have attained had such other parent survived or if, in either case, the age of such other parent cannot be determined, the age of the Participant. The annual amount of the surviving dependent’s annuity payable after the
Participant’s death to the Participant’s Dependent Disabled Child or Children who remain disabled shall equal the percentage designated by the Participant, not to exceed 50, of the annual amount of the Participant’s Service Annuity
computed pursuant to Article 5 (relating to Service Annuities). 
 Section 6.3. Pre-retirement Surviving Spouse Benefit.
(a) Death Occurring During Employment after Completion of Ten Years of Credited Service. Except as provided in Section 6.5 (relating to death benefits with respect to certain Participants who die during employment and after age 65),
if the Termination of Employment of a Participant who completed at least ten years of Credited Service shall occur by reason of the Participant’s death, the Participant’s Spouse, if the Participant is married on the date of the
Participant’s death, shall receive a surviving spouse annuity payable in semi-monthly payments for the surviving Spouse’s lifetime commencing on the Service Annuity payment date immediately following the later of the Participant’s
death and the date the Participant would have attained age 65 or, in the event that the Participant dies prior to attainment of age 65, such earlier Service Annuity payment date elected by the surviving Spouse in writing in the manner specified by
the Administrator. The annual amount of such surviving spouse annuity shall be 50% of the annual amount of the Service Annuity, computed pursuant to Section 5.2 (relating to normal and deferred retirement), that would have been payable to such
Participant (i) had the Participant terminated employment the day before the Participant’s death; or (ii) in the case of a Participant who dies before attaining age 55, had the Participant’s Service Annuity commenced on the date
the Participant would have attained age 55, in either case, reduced by 2% for each year (computed to the nearest full year), if any, by which the age of such Participant exceeds that of the Participant’s surviving Spouse. Notwithstanding the
preceding sentence, in no event shall the annual amount of the surviving 

  
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spouse annuity computed pursuant to this paragraph (a) of Section 6.3 be less than 50% of the annual amount of the marital annuity, computed pursuant to paragraph (b) of
Section 6.1 (relating to annuities payable to married Participants), that would have been payable to such Participant (i) had payment of the Participant’s marital annuity commenced the day before the Participant’s death or
(ii) in the case of a Participant who dies before attaining age 55, had payment of such marital annuity commenced at age 55 reduced by 1/2% for each month (but not to exceed 120 months) that the Participant’s death precedes the date the
Participant would have attained age 55 had the Participant survived, 1/6% for each month (but not to exceed 120 months) that the Participant’s death precedes the date that the Participant would have attained age 45 had the Participant survived,
and 1/12% for each month the Participant’s death precedes the date that the Participant would have attained age 35 had the Participant survived. 

(b) Death Occurring After Termination of Employment and Completion of Ten Years of Credited Service. If a Participant who completed at
least ten Years of Credited Service and who is entitled to a deferred Service Annuity under Section 5.7 (relating to deferred vested termination) shall die before the Participant’s Annuity Starting Date, the Participant’s Spouse, if
the Participant is married on the date of the Participant’s death, shall be entitled to receive a surviving spouse annuity payable in semi-monthly payments for the surviving Spouse’s lifetime commencing on or about the first Service
Annuity payment date immediately following the later of the date of the Participant’s death and the date the Participant would have attained age 65. Notwithstanding the preceding sentence, in the case of a Participant described in the preceding
sentence who dies prior to attaining age 65, such Participant’s surviving Spouse may elect, in writing in the manner specified by the Administrator, to receive payment of the surviving spouse annuity on any Service Annuity payment date
following the later of the date of the Participant’s 

  
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death and the date the Participant would have attained age 50, but in no event later than the first Service Annuity payment date immediately following the date the Participant would have attained
age 65. The annual amount of the surviving spouse annuity shall be 50% of the annual Service Annuity computed pursuant to Section 5.7 (relating to deferred vested termination), that would have been payable to such Participant (i) had
payment of such deferred Service Annuity commenced the day before the Participant’s death, or (ii) in the case of a Participant who dies before attaining age 50, had payment of the Participant’s deferred Service Annuity commenced at
age 50, in either case, reduced by 2% for each year (computed to the nearest full year), if any, by which the age of such Participant exceeds the age of the Participant’s surviving Spouse. Notwithstanding the preceding sentence, in no event
shall the annual amount of the surviving spouse annuity computed pursuant to this paragraph (b) of Section 6.3 be less than 50% of the annual amount of the marital annuity, computed pursuant to paragraph (b) of Section 6.1
(relating to annuities payable to married Participants), that would have been payable to such Participant (i) had payment of the Participant’s marital annuity commenced the day before the Participant’s death or (ii) in the case
of a Participant who dies before attaining age 50, had payment of such a marital annuity commenced at age 50. 
 (c) Death Occurring
after Completion of at Least Five Years of Vesting Service but Less than Ten Years of Credited Service. Except as provided in Section 6.5 (relating to death benefits with respect to certain Participants who die during employment and after
age 65), if a Participant who has at least five years of Vesting Service but less than ten years of Credited Service shall die prior to the Participant’s Annuity Starting Date, the Participant’s Spouse, if the Participant is married on the
date of the Participant’s death, shall be entitled to receive a surviving spouse annuity payable in semi-monthly payments for the surviving Spouse’s lifetime 

  
 -40- 

 
commencing on or about the first Service Annuity payment date immediately following the later of the date of the Participant’s death and the date the Participant would have attained age 65.
Notwithstanding the preceding sentence, the surviving Spouse of a Participant who is described in the preceding sentence and who dies before the Participant’s 65th birthday may elect, in writing in the manner specified by the Administrator, to
receive payment of the surviving spouse annuity on any Service Annuity payment date following the later of the date of the Participant’s death and the date the Participant would have attained age 60, but in no event later than the first Service
Annuity payment date immediately following the date the Participant would have attained age 65. The annual amount of the surviving spouse annuity shall be 50% of the annual Service Annuity computed pursuant to Section 5.7 (relating to deferred
vested termination) that would have been payable to such Participant had payment of such deferred Service Annuity commenced at age 65, in either case, reduced by 2% for each year (computed to the nearest full year), if any, by which the age of such
Participant exceeds the age of the Participant’s surviving Spouse. Notwithstanding the preceding sentence, in no event shall the annual amount of the surviving spouse annuity computed pursuant to this paragraph (c) of Section 6.3 be
less than 50% of the annual amount of the marital annuity, computed pursuant to paragraph (b) of Section 6.1 (relating to annuities payable to married Participants) that would have been payable to such Participant had payment of such
marital annuity commenced at age 65. 
 Except as provided in Section 6.4 (relating to pre-retirement surviving Child benefits) or
Section 6.5 (relating to death benefits with respect to certain Participants who die during employment and after age 65), no Service Annuity or other benefit shall be payable under this Plan with respect to a Participant who dies prior to the
Participant’s Annuity Starting Date and who on the date of the Participant’s death has no surviving Spouse. In addition, except as 

  
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provided in Section 6.5 (relating to death benefits with respect to certain Participants who die during employment and after age 65), no Service Annuity or other benefit shall be payable
under this Plan with respect to a Participant who dies prior to completion of at least five years of Vesting Service. 
 Section 6.4.
Pre-retirement Surviving Child Benefits. In the event of the death of any Participant who (i) has at least ten years of Credited Service and (ii) has on file with the Plan Administrator either a family annuity or a surviving
dependent’s annuity or, for Plan Years beginning on and after January 1, 2007, meets the eligibility conditions to elect a family annuity or surviving dependent’s annuity, then, except as provided in Section 6.5 (relating to
death benefits with respect to certain Participants who die during employment and after age 65), such Participant’s surviving Dependent Minor Children or Dependent Disabled Children, as the case may be, shall receive a surviving child annuity
payable in semi-monthly payments commencing on the Service Annuity payment date immediately following the Participant’s death and ending with the Service Annuity payment for the period next preceding the date on which (i) in the case of a
family annuity, all of the Participant’s Children have attained age 21 and (ii) in the case of a surviving dependent’s annuity, all of the Participant’s Children cease to be Dependent Disabled Children. The annual amount of such
surviving child annuity shall be the annual annuity the Participant’s Child or Children would have received (i) had the Participant terminated employment on the date of the Participant’s death under circumstances entitling the
Participant to a Service Annuity under Section 5.2 (relating to Normal and Deferred Retirement) or Section 5.3 (relating to Early 

  
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Retirement) and died subsequently, or (ii) in the case of a Participant who dies before attaining age 55, had the Participant terminated employment at age 55 under circumstances entitling
the Participant to a Service Annuity under Section 5.3 (relating to Early Retirement) and died subsequently, in either case, reduced by 2% for each year (computed to the nearest full year), if any, by which the age of such Participant exceeds
the age of the other parent of such Child or Children at the Participant’s death or the age such other parent would have attained on such date had such other parent survived or if, in either case, the age of such other parent cannot be
determined, the age shall be deemed to be the same as the Participant. 
 Section 6.5. Death Benefits for Spouse or Child of
Participant Who Dies During Employment After Age 65. Notwithstanding any provision of this Plan to the contrary, in the event of the death of any Participant who (a) has attained age 65 and (b) on the date of his or her death the
Participant is married or has on file with the Plan Administrator an election for a family annuity or a surviving dependent’s annuity or, for Plan Years beginning on and after January 1, 2007, meets the eligibility conditions to elect a
family annuity or surviving dependent’s annuity, the Participant’s surviving Spouse, Dependent Minor Children or Dependent Disabled Children, as the case may be, shall receive the annuities they would have received had the Participant
terminated employment on the date of the Participant’s death under circumstances entitling the Participant to a Service Annuity under Section 5.2 (relating to Normal and Deferred Retirement) and died subsequently, or, in the case of a
surviving Spouse, a surviving spouse annuity computed pursuant to the applicable paragraph of Section 6.3 (relating to pre-retirement surviving spouse benefits), if greater. 

Section 6.6. Election Procedure. (a) Notice of Availability of Elections. No less than 30 days and no more than 90
days before the Participant’s Annuity Starting Date, the Administrator shall give the Participant by mail or personal delivery written notice in nontechnical language that, if the Participant is eligible, the Participant may elect an optional
form of Service Annuity set forth in Section 6.2 (relating to optional Service Annuity forms). 

  
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Notwithstanding the preceding sentence, the Administrator may deliver such notice to the Participant less than 30 days before the Participant’s Annuity Starting Date, provided that
(i) the Participant and the Participant’s spouse (if any) waive any requirement that such notice be provided no less than 30 days before the Participant’s Annuity Starting Date and (ii) payment of the Participant’s Service
Annuity commences more than 7 days after such notice is received by the Participant. The notice referred to herein shall mean a notice written in nontechnical language that includes a general description of the benefit forms provided under the Plan,
including the terms and conditions of the basic benefit forms provided under the Plan and the circumstances under which such forms will be provided unless the Participant elects otherwise, with applicable spousal consent, a description of the
eligibility conditions for and any material features of the optional forms of benefit, general information on the relative financial effect upon a Participant’s benefit if he elects an optional form of benefit or revokes any prior election, and
a description of the relative value of the optional forms of benefit as compared to a marital annuity. In no event shall payment of a Participant’s monthly benefits commence before the notice is made available to the Participant and he has had
an opportunity to make the election described in Section 6.1(b). Notwithstanding the foregoing, the notice described in the previous paragraph may be provided to the Participant subsequent to the Participant’s Annuity Starting Date, if the
Participant so elects, provided that the following conditions are satisfied: 
 (i) the date the on which the first payment
to be received by the Participant is made (the “initial payment date”) shall be no earlier than thirty (30) days following the date that the notice is furnished to the Participant, except that the initial payment date may be as early
as the seventh day after such notice is provided if (i) such notice clearly indicates that the Participant has a right to a period of thirty (30) days after receiving the notice to consider to waive the basic forms of distribution provided
under the Plan and to elect (with spousal consent) an optional form of benefit, (ii) the Participant affirmatively elects a form of distribution with the consent of his or her spouse (if required) to commence as of the initial payment date, and
(iii) the Participant is permitted to revoke such election until the initial payment date; 

  
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 (ii) the notice shall be provided to the Participant no more than ninety
(90) days before the initial payment date, however, the Plan will not fail to satisfy the ninety (90)- day requirement if the delay in providing the distribution is due solely to an administrative delay; 

(iii) the Participant is not permitted to elect an Annuity Starting Date that precedes the date upon which the Participant
could have otherwise started receiving benefits under the terms of the Plan as in effect on the Annuity Starting Date; 

(iv) to the extent that a Participant has not received any payments for the period from the Annuity Starting Date to the
initial payment date, the Participant shall receive a one-time payment to reflect any such missed payments (a “make-up payment”). Such make-up payment shall be adjusted for interest from the period beginning on the Annuity Starting Date
and ending on the initial payment date, which shall be calculated with respect to such payments that would have been received prior to the initial payment date. The interest rate used to compute the adjustment described in the preceding sentence
shall equal the 30 Year Treasury rate for December of the preceding Plan Year. Notwithstanding the foregoing, with respect to any Annuity Starting Date on or after January 1, 2008, the interest rate used to compute the adjustment described in
the sentence above shall be the interest rate as specified or prescribed by the Commissioner of the Internal Revenue Service for purposes of Section 417(e)(3) of the Code, in revenue rulings, notices or other guidance for November of the
preceding Plan Year. For purposes of Section 7.1 of the Plan, the limitations set forth therein shall comply with the adjustments required thereto pursuant to Treasury Regulation 1.417(e)-1 with respect to any Annuity Starting Date described in
this paragraph which is a “retroactive annuity starting date” as defined for purposes of such Regulation; and 

(v) if a Participant who is married elects to commence the Participant’s benefit as of the initial payment date pursuant
to this paragraph, then the Participant’s spouse (including an alternate payee who is treated as the Participant’s spouse under a qualified domestic relations order), determined as of the initial payment date, must consent to such election
if the survivor benefits payable as of the Annuity Starting Date are less than the survivor benefits payable under the benefit described in Section 6.2(b) of the Plan as of the initial payment date. 

(b) Election of Optional Form of Service Annuity. Subject to the terms of, and except as otherwise provided by, this paragraph, a
Participant may, at any time during the 90-day period ending on the Participant’s Annuity Starting Date, elect, change or revoke (i) any form of 

  
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Service Annuity provided under this Plan and (ii) the percentage of the Participant’s Service Annuity to be paid to a Spouse under a marital annuity, to a Dependent Minor Child under a
family annuity or to a Dependent Disabled Child under a surviving dependent’s annuity. Notwithstanding the preceding sentence, if the written notice described in paragraph (a) of this Section 6.6 is delivered to the Participant within
30 days of, or after, the Participant’s Annuity Starting Date, the Participant may make an election, change or revocation as described in the preceding sentence at any time within 30 days after the date the written notice described in paragraph
(a) of this Section 6.6 is delivered to the Participant. The Participant and the Participant’s Spouse, if any, may waive the 30 day period described in the preceding sentence and begin receiving payment of the Participant’s
Service Annuity prior to the expiration of such 30-day period, provided that distribution of the Participant’s Service Annuity commences more than 7 days after the notice described in paragraph (a) of this Section 6.6 is delivered to
the Participant. An election, change or revocation described in this paragraph (b) shall be made by delivering a written notice describing the election, change or revocation to the Administrator. Notwithstanding the foregoing, if the
Participant is married on the Participant’s Annuity Starting Date, the Participant’s election to receive an optional form of Service Annuity under Section 6.2 (relating to optional Service Annuity forms) in lieu of the marital annuity
described in paragraph (b) of Section 6.1 (relating to annuities payable to married Participants) shall not be effective unless (i) it shall have been consented to at the time of such election in writing by the Participant’s
Spouse and such consent acknowledges the effect of such election and is witnessed by either a Plan representative or a notary public, or (ii) it is established to the satisfaction of a Plan representative that such consent cannot be obtained
because the Participant’s Spouse cannot be located or because of such other circumstances as may be prescribed in Regulations. An 

  
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election of an optional Service Annuity form shall be deemed a rejection of the basic Service Annuity form provided in Section 6.1 (relating to the basic Service Annuity form of payment).
The consent of a Spouse required by this paragraph shall not be necessary for a distribution required by a qualified domestic relations order described in paragraph (b) of Section 13.2. 

(c) Automatic Cancellation of Elections. If a Participant’s Service Annuity is payable in the form of a marital annuity and if,
prior to the Participant’s Annuity Starting Date, the Participant’s spouse dies or the Participant and such spouse divorce, the Participant’s election or deemed election to receive a marital annuity shall, upon the Participant’s
notice to the Administrator of such death or divorce, be automatically cancelled, unless, subsequent to such spouse’s death or the Participant’s divorce and prior to the Participant’s Annuity Starting Date, the Participant remarries
and notice of such new marriage is timely received by the Administrator. 
 If a Participant’s Service Annuity is payable in the form
of a marital annuity and if, after the Participant’s Annuity Starting Date, the Participant’s Spouse predeceases the Participant or the Participant’s Spouse, pursuant to a duly entered divorce decree, specifically relinquishes all
rights to receive any Service Annuity in the event of the Participant’s death, the Participant’s Service Annuity shall be recomputed prospectively as if the Participant were not married on the Annuity Starting Date. Any marriage by the
Participant after the Participant’s Annuity Starting Date shall not affect the payment of the Participant’s Service Annuity or require any payment to the Participant’s new spouse. 

If a Participant has elected to receive a family annuity and, either before or after payment of such annuity commences, all of the
Participant’s previously Dependent Minor Children have predeceased the Participant or have ceased to be dependent, within the meaning of Section 152 of the Code, the Participant’s election to receive a family annuity shall, upon the
Participant’s notice to the Administrator of such death or cessation of being a dependent, be automatically cancelled. 

  
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 If a Participant has elected to receive a surviving dependent’s annuity and either before or
after payment of such annuity commences, all of the Participant’s previously Dependent Disabled Children have predeceased the Participant or have ceased to be Dependent Disabled Children, as certified by the medical director of the Company or
by such other licensed physician designated by the Company, the Participant’s election to receive a surviving dependent’s annuity shall, upon the Participant’s notice to the Administrator of such death or cessation of being a
Dependent Disabled Child, be automatically cancelled. 
 A Participant whose election has been automatically cancelled pursuant to this
paragraph (c) shall be entitled to receive the Service Annuity described in Section 6.1 (relating to the basic Service Annuity form of payment) or, in the case of an election that is automatically cancelled prior to the Participant’s
Annuity Starting Date and subject to Section 6.1 (relating to the basic Service Annuity form of payment), such other form of Service Annuity described in Section 6.2 (relating to optional Service Annuity forms) for which the Participant is
eligible and elects in accordance with this Section 6.6. 
 Section 6.7. Lump Sum Payment. Notwithstanding anything herein
to the contrary, if the monthly amount of any Service Annuity shall initially be or at any time become $10 or less, the Participant, Beneficiary or Retiree may, in lieu of such annuity, elect to receive, and within 30 days after such election there
shall be paid to such Participant, Beneficiary or Retiree, an amount equal to the lump sum equivalent of such annuity calculated on the basis of the “applicable interest rate” as defined in Section 417 of the Code and the Regulations

  
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promulgated thereunder and the applicable mortality table. Notwithstanding the foregoing, for purposes of computing single sum payments on or after January 1, 2008, (i) the interest
rate used shall be the interest rate as defined in Section 417(e)(3)(C) of the Code for the second month preceding the calendar year in which such distribution is made or commences and (ii) the mortality table shall be the mortality table
specified by the Commissioner of the Internal Revenue Service for purposes of Section 417(e)(3) 
 of the Code as in effect on the first day of the Plan
Year in which the Annuity Starting Date occurs. Notwithstanding the foregoing, for purposes of computing single sum payments on or after December 1, 2012, other than under Section 6.9 (relating to Special Lump Sum Payment Option),
(i) the interest rate used shall be the interest rate as defined in Section 417(e)(3)(C) of the Code for the fifth month (or, if more favorable to the recipient of a single sum payment between December 1, 2012 and December 1,
2013), the second month) preceding the calendar year in which such distribution is made or commences and (ii) the mortality table shall be the mortality table specified by the Commissioner of the Internal Revenue Service for purposes of
Section 417(e)(3) of the Code as in effect on the first day of the Plan Year in which the Annuity Starting Date occurs. 
 In the case
of a distribution pursuant to this Section 6.7 that is an “eligible rollover distribution” within the meaning of Section 402 of the Code and that is at least $200, an eligible distributee (as defined below) may elect that all or
any portion of such distribution shall be directly transferred as a rollover contribution from the Service Annuity Fund to (i) an individual retirement account described in Section 408(a) of the Code, (ii) an individual retirement
annuity described in Section 408(b) of the Code, (iii) an annuity plan described in Section 403(a) of the Code, (iv) an annuity contract described in Section 403(b) of the Code, (v) a retirement plan qualified under
Section 401(a) of the Code, (vi) an eligible plan under Section 457(b) of the Code which is maintained by an eligible employer described in Section 457(e)(1)(A) 

  
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of the Code (the terms of which permit the acceptance of rollover contributions) or (vii) effective January 1, 2008, a Roth IRA described in Section 408A of the Code; provided,
however, that (x) with respect to a plan described in clause (vii), for transfers occurring before January 1, 2010, the Participant (or surviving Spouse of a Participant or a former Spouse who is an alternate payee under a qualified
domestic relations order as defined in Section 414(p) of the Code) meets the requirements of Section 408A(c)(3)(B) of the Code and (y) with respect to a distribution (or portion of a distribution) to a person who is not the
Participant or the surviving Spouse of the Participant, “eligible retirement plan” shall mean only a plan described in clause (i) or (ii) or effective January 1, 2010, clause (vii), that, in either case, is established for
the purpose of receiving such distribution on behalf of such person. For purposes of the preceding sentence, the term “Spouse” shall include the Participant’s surviving Spouse and the Participant’s Spouse or former Spouse who is
the alternate payee under a qualified domestic relations order. In addition, in the case of a distribution that occurs on or after January 1, 2008, a Beneficiary who is not the Spouse of the Participant may elect that all or any portion of such
distribution shall be directly transferred as a rollover contribution from this Plan to (i) an individual retirement account described in section 408(a) of the Code or (ii) an individual retirement annuity described in section 408(b) of
the Code that, in either case, is established for the purpose of receiving such distribution on behalf of the Beneficiary. Notwithstanding the foregoing, an eligible distributee shall not be entitled to elect to have less than the total amount of
such distribution transferred as a rollover contribution unless the amount to be transferred equals at least $500. At least 30 days but no more than 90 days prior to the date on which the eligible distributee is entitled to receive a distribution
described in this Section 6.7, a written 

  
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explanation shall be provided to the eligible distributee of the availability of the direct rollover option, the rules that require income tax withholding on distributions, the rules under which
the eligible distributee may roll over the distribution within 60 days of receipt and, if applicable, other special tax rules that may apply to the distribution. 

For purposes of this Section 6.7, “eligible distributee” shall include the Participant, his Spouse or his alternate payee under
a qualified domestic relations order within the meaning of Section 414(p) of the Code and, effective January 1, 2008, the Participant’s Beneficiary who is not the Participant’s Spouse. 

Section 6.8. Distributions to Dependent Minor and Disabled Children. Any distribution under this Plan to a Dependent Minor Child
or Dependent Disabled Child, or payment to any person for the account of a Dependent Minor Child or Dependent Disabled Child, as the case may be, shall discharge all obligations in respect of such payment, and none of the Company, the Trustee, the
Administrator, the Investment Office or the Corporate Investment Committee, shall have any duty to see to the application by any third party of any distribution made to or for the benefit of such Dependent Minor Child or Dependent Disabled Child.

 Section 6.9. Special Lump Sum Payment Option. (a) Eligibility. A Participant (but not his or her Beneficiary) may
elect to receive, during the election period described in paragraph (b) of this Section 6.9, his or her deferred Service Annuity (“Deferred Service Annuity”) under Section 5.7 (relating to deferred vested termination) in the
form of a lump sum payment (“Special Lump Sum Payment”) or, an “Immediately Commencing Annuity” (as defined below); provided, however, that: 

(i) the Participant has a Termination of Employment on or prior to June 30, 2012 and does not die and is not rehired
during the period beginning July 1, 2012 and ending on the date payment is made or commences in accordance with this Section 6.9; 

  
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 (ii) such Termination of Employment is not on account of the Participant’s
disability, following which the Participant is receiving long-term disability payments under any long-term disability program of an Employer, including on June 30, 2012; 

(iii) the Participant’s Deferred Service Annuity is not subject to a qualified domestic relations order as defined in
Section 414(p) of the Code; 
 (iv) the Participant is not immediately, as of his or her Termination of Employment,
eligible for early retirement benefits in accordance with Section 5.3 (relating to early retirement); 
 (v) the
Participant is not on a leave of absence or layoff from an Employer on June 30, 2012; 
 (vi) the Participant is not 70  1⁄2 years of age or older as of October 1, 2012; and 

(vii) the Participant can be located, after a diligent search, as necessary, by the Plan Administrator before July 1,
2012. 
 For each such Participant described in this paragraph (a) of Section 6.9, the term “Immediately Commencing Annuity” shall mean,
as applicable, either: 
 (i) with respect to a Participant eligible to commence receipt of his or her Deferred Service
Annuity as of December 1, 2012, in accordance with the requirements of Section 5.7 (relating to deferred vested termination), any applicable optional form of annuity described in Sections 6.1 (relating to basic service annuity forms) or
6.2 (relating to optional service annuity forms); or 
 (ii) with respect to any other Participant, a “Service
Annuity Payable for the Life of the Participant,” an “Optional Marital Annuity” or a “75% Martial Annuity,” each as described in the first paragraph of Section 6.2 (relating to optional service annuity forms). 

(b) Election and Election Period. To receive the distribution of benefits described in paragraph (a) of this Section 6.9, an
eligible Participant must voluntarily elect to receive a distribution pursuant to this Section 6.9 by completing an election form and spousal waiver, if required, provided by the Administrator, and submitting such forms to the Administrator
after October 1, 2012 and before the following dates, as applicable, 
 (i) November 15, 2012, with respect to a
Participant whose Termination of Employment occurs on or after April 1, 1995 and who elects a Special Lump Sum Payment; 

  
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 (ii) November 30, 2012, with respect to a Participants whose Termination of
Employment occurs before April 1, 1995 and who elects a Special Lump Sum Payment; and 
 (iii) December 15, 2012,
with respect to a Participant who elects an Immediately Commencing Annuity, 
 or such other period during 2012 determined by the Administrator. 

The Administrator shall provide each eligible Participant, not less than 30 days and not more than 180 days before the Annuity Starting Date, an application
form including a general description of the material features, as well as an explanation of the relative values and financial effect, of the optional forms of benefit available under this Section 6.9, in a manner that satisfies the notice
requirements of Section 417(a)(3) of the Code and the Regulations thereunder. The form shall indicate the Participant’s right to waive a survivor annuity, his surviving Spouse’s right to consent to such waiver or refuse such consent,
and the right to revoke any waiver, within the 180 day period preceding the Annuity Starting Date, and shall include a description of the right of the Participant, if any, to defer receipt of a distribution and the consequences of failure to defer
such receipt, in accordance with Treasury guidance under Section 411(a)(11) of the Code. 
 (c) Amount of Payment. The Special
Lump Sum Payment shall equal the actuarial equivalent of the Participant’s nonforfeitable Deferred Service Annuity, based on the following factors: 

(i) the applicable interest rate described in Section 417(e)(3) of the Code for August of 2011; 

(ii) an assumed commencement date of the later of (A) age 62, with respect to a Participant whose Termination of
Employment occurs on or after April 1, 1995, or 65, with respect to a Participant whose Termination of Employment occurs before April 1, 1995, and (B) the Participant’s age as of December 1, 2012; 

  
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 (iii) the applicable mortality table, as defined in Section 417 of the Code
and the Regulations promulgated thereunder; and 
 (iv) an assumed cost of living adjustment of 2.5% for purposes of
Section 5.9 (relating to post retirement adjustments). 
 The Immediately Commencing Annuity shall be calculated: 

(i) in accordance with the applicable terms of the Plan, for a Participant who is eligible to immediately commence benefits
under the terms of the Plan as of the payment date set forth in paragraph (d) of this Section 6.9; and 
 (ii) as
the actuarial equivalent of the Special Lump Sum Payment, for each other Participant. 
 (d) Payment of Benefit. If an eligible
Participant elects the distribution of his or her Deferred Service Annuity in accordance with this Section 6.9, payment shall be made, or commence to be made, on or before December 1, 2012, or as soon as administratively practicable
thereafter. 
 (e) Death and Rehire. If an eligible Participant elects the distribution of his or her Deferred Service Annuity in
accordance with this Section 6.9 and subsequently dies or is rehired as an Employee before distributions commence, his or her election shall be null and void and the Participant’s benefit shall be paid pursuant to the Plan without regard
to this Section 6.9. Notwithstanding anything contained herein to the contrary, upon distribution of a Special Lump Sum Payment or an Immediately Commencing Annuity made to an individual in accordance with this Section 6.9, in the event of
the individual’s rehire with an Employer following the date such distribution is made, the individual shall not be eligible to participate in the Plan during such period of rehire and may be eligible to participate in the Exelon Corporation
Cash Balance Pension Plan or the Exelon Corporation Pension Plan for Bargaining Unit Employees (or such other plan that applies to employees of an Employer hired on or after December 1, 2012), as applicable, in accordance with their terms and
conditions. 

  
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 ARTICLE 7 

LIMITATIONS ON BENEFITS 

Section 7.1. Maximum Annual Benefits. Notwithstanding any other provision of the Plan to the contrary, the amount of the
Participant’s annual benefit (as defined below) accrued, distributed or payable at any time under the Plan shall be limited to an amount such that such annual benefit and the aggregate annual benefit of the Participant under all other defined
benefit plans maintained by the Employer or any other Affiliate does not exceed the lesser of: 
 (i) $160,000 (as increased
to reflect the cost of living adjustments provided under Section 415(d) of the Code), multiplied by a fraction (not exceeding 1 and not less than 1/10th), the numerator of which is the Participant’s years of participation (within the
meaning of Section 1.415(b)-1(g)(1)(ii) of the Regulations) and the denominator of which is 10; or 
 (ii) an amount
equal to 100% of the Participant’s average compensation for the 3 consecutive calendar years in which his or her compensation was the highest (as determined in accordance with Section 1.415(b)-1(a)(5) of the Regulations) and which are
included in his or her years of service (within the meaning of Section 1.415(b)-1(g)(2)(ii) of the Regulations) with the Employers multiplied by a fraction (not exceeding 1 and not less than 1/10th), the numerator of which is the
Participant’s years of service with the Employers and the denominator of which is 10. 
 The dollar amount set forth in clause
(i) of the preceding paragraph shall be actuarially reduced in accordance with Section 1.415(b)-1(d) of the Regulations if the Participant’s Pension Starting Date occurs prior to the Participant’s attainment of age 62. If the
Participant’s Pension Starting Date occurs after the Participant’s attainment of age 65, such dollar amount shall be actuarially increased in accordance with Section 1.415(b)-1(e) of the Regulations. 

  
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 A Participant’s “annual benefit” shall mean the Participant’s accrued benefit
payable annually in the form of a straight life annuity, as determined in, and accordance with, Section 1.415(b)-1(b) of the Regulations. If the annual benefit is payable in a form other than a single life annuity, the annual benefit shall be
adjusted to the actuarial equivalent of a single life annuity using the assumptions of the following sentences; provided, however, that no adjustment shall be required for survivor benefits payable to a surviving spouse under a
qualified joint and survivor annuity (as described in Section 6.1(b)) to the extent such benefits would not be payable if the Participant’s annual benefit were paid in another form. 

Effective for Plan Years beginning January 1, 2004 and January 1, 2005, for any form of benefit subject to Section 417(e)(3) of
the Code, a Participant’s annual benefit shall be the greater of (i) the amount computed using the annual interest rate specified under section 417(e) of the Code for the November preceding the calendar year in which such distribution is
made or commences, and the mortality table prescribed for purposes of section 417(e)(3)(A)(ii)(I) of the Code (the “Actuarial Equivalent”) and (ii) the amount computed using an interest rate assumption of 5.5% and the applicable
mortality table under Section 1.417(e)-1(d)(2) of the Regulations (the “Applicable Mortality Table”). Effective for Plan Years beginning on or after January 1, 2006, for any form of benefit subject to Section 417(e)(3) of
the Code, a Participant’s annual benefit shall be the greatest of (i) the amount computed using the Actuarial Equivalent under the Plan, (ii) the amount computed using an interest rate assumption of 5.5% and the Applicable Mortality
Table and (iii) the amount computed using the applicable interest rate under Section 1.417(e)-1(d)(3) of the Regulations and the Applicable Mortality 

  
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Table, divided by 1.05. Effective for Plan Years beginning on or after January 1, 2006, for any form of benefit not subject to Section 417(e)(3) of the Code, a Participant’s annual
benefit shall be determined in accordance with Section 1.415(b)-1(c) of the Regulations. An individual’s “annual benefit” under any other defined benefit plan maintained by the Employer and Affiliate shall be as determined
pursuant to the provisions of Section 415 of the Code and the Regulations issued thereunder the terms of such plan. 
 Notwithstanding
the foregoing provisions of this Section, the limitation provided by this Section shall not apply to a Participant who has not at any time participated in a defined contribution plan maintained by any Employer and whose annual benefit under the Plan
does not exceed $10,000 multiplied by a fraction (not exceeding 1 and not less than 1/10th) the numerator of which is the Participant’s years of years of service (within the meaning of Section 1.415(b)-1(g)(2)(ii) of the Regulations) and
the denominator of which is 10. 
 For purposes of this Section, the term “compensation” shall have the meaning set forth in
Section 415(c)(3) of the Code and the applicable Regulations, the term “defined contribution plan” shall have the meaning set forth in Section 1.415(c)-1(a)(2) of the Regulations, the term “defined benefit plan” shall
have the meaning set forth in Section 1.415(b)-1(a)(2) of the Regulations and the term “Employer” shall include the Employers and all corporations and entities required to be aggregated with any of the Employers pursuant to
Section 414(b) and (c) of the Code as modified by Section 415(h) of the Code. Section 415 of the Code and the Regulations thereunder are hereby incorporated by reference. 

  
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 Section 7.2. Temporary Restrictions on Benefits in Case of Termination or
Curtailment. This Section 7.2 sets forth restrictions required by the Internal Revenue Service on the Service Annuity payable for a Plan Year to a highly compensated employee or highly compensated former employee, as described in
Section 414(q) of the Code and Regulations who is among the twenty-five highest paid nonexcludable employees in the service of the Employers for the Plan Year. The restrictions set forth in this Section 7.2 shall not become applicable if:

 (1) after payment to such highly compensated employee of any Service Annuity, the value of Plan assets equals or exceeds
110 percent of the value of current liabilities (as defined in Section 412(l)(7) of the Code), 
 (2) the value of the
Service Annuity paid to such highly compensated employee is less than one percent of the value of current liabilities of the Plan, or 

(3) the value of the Service Annuity payable to or on behalf of such highly compensated employee does not exceed the amount
described in Section 411(a)(11)(A) of the Code. 
 If the Service Annuity payable to a Participant is subject to the restrictions set
forth in this Section 7.2, the Service Annuity provided from the Plan shall not exceed the payments that would be made on behalf of such Participant under a single life annuity that is the actuarial equivalent of the sum of the
Participant’s Service Annuity and the Participant’s other benefits under the Plan. 
 The foregoing conditions do not restrict the
full payment of any death or survivor’s benefits on behalf of a Participant who dies while the Plan is in full effect and its full current costs have been met. 

Any amounts that become due but because of the limitations of this Section 7.2, if applicable, cannot be made available to or for the
Participant (either currently or later) shall be applied to reduce subsequent contributions of the Employers; but if the Employers have ceased contributions to the Plan, such amounts shall be applied for the benefit of Participants not affected by
this Section 7.2 in an equitable and nondiscriminatory manner. 

  
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 This Section 7.2 is inserted solely for the purpose of complying with the requirements of
the Internal Revenue Service and shall not be applied except to the extent necessary to comply with such requirements. 
 Section 7.3
Benefit Restrictions as a Result of Funding. (a) Notwithstanding any provision of the Plan to the contrary, the following benefit restrictions shall apply if the Plan’s “Adjusted Funding Target Attainment Percentage” (the
“AFTAP”), as defined in Section 436(j) of the Code, is at or below the following levels. 
 (i) If the
Plan’s AFTAP is 60% or greater but less than 80% for a Plan Year, the Plan shall not pay any prohibited payment (as defined in subsection 7.3(a)(iv) below) after the valuation date for the Plan Year to the extent the amount of the payment
exceeds the lesser of (x) 50% of the amount of the payment which could be made without regard to the restrictions under this subsection 7.3 and (y) the present value (determined pursuant to guidance prescribed by the Pension Benefit
Guaranty Corporation, using the interest and mortality assumptions under Section 417(e) of the Code) of the maximum guarantee with respect to the Participant under Section 4022 of ERISA. Notwithstanding the preceding sentence, only one
such prohibited payment may be made with respect to any Participant during any period of consecutive Plan Years to which the limitations under either clause (x) or (y) of the preceding sentence apply. For purposes of this subsection
7.3(a)(i), a Participant, his Beneficiary and any alternate payee (as defined in Section 414(p)(8) of the Code) shall be deemed a single “Participant.” 

(ii) If the Plan’s AFTAP is less than 60% for a Plan Year, the Plan shall not pay any prohibited payment after the
valuation date for the Plan Year. 
 (iii) During any period in which the Company is a debtor in a case under Title 11,
United States Code (or similar federal or state law), the Plan shall not make any prohibited payment. The preceding sentence shall not apply on or after the date on which the Plan’s enrolled actuary certifies that the AFTAP is not less than
100%. 
 (iv) For purposes of this subsection 7.3(a), the term “prohibited payment” means (x) any payment, in
excess of the monthly amount paid under a single life annuity (plus any supplements described in Section 6.2), to a Participant or Beneficiary whose annuity starting date (as defined in Section 417(f)(2) of the Code and any regulations
promulgated thereunder) occurs during any period a limitation under subsection 7.3(a)(ii) or (iii) is in effect, (y) any payment for the purchase of an irrevocable commitment from an insurer to pay benefits or (z) any other payment
specified by the Secretary of the Treasury by regulations. 

  
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 (b) In any Plan Year in which the Plan’s AFTAP for such Plan Year is less than 60%, benefit
accruals under the Plan shall cease as of the valuation date for the Plan Year. This restriction shall cease to apply with respect to any Plan Year, effective as of the first day of the Plan Year, upon payment by the Company or the Employers of a
contribution (in addition to any minimum required contribution under Section 430 of the Code) equal to the amount sufficient to result in an AFTAP of 60%. 

(c) No amendment which has the effect of increasing Plan liabilities by reason of increases in benefits, establishment of new benefits,
changing the rate of benefit accruals or the rate at which benefits become nonforfeitable shall take effect during any Plan Year if the Plan’s AFTAP for such Plan Year is less than 80% or would be less than 80% after taking into account such
amendment; provided, however, that the preceding restriction shall not apply to an amendment which provides for an increase in benefits under a formula which is not based on a Participant’s compensation if the rate of such increase is not in
excess of the contemporaneous rate of increase in average wages of Participants covered by the amendment; and provided, further, that such restriction shall cease to apply with respect to any Plan Year, effective as of the first day of the Plan Year
(or if later, the effective date of the amendment), upon payment by the Company or the Employers of a contribution as described in Section 436(c)(2) of the Code. 

(d) The Plan shall not provide an unpredictable contingent event benefit payable with respect to any event occurring during any Plan Year if
the AFTAP for such Plan Year is less than 60% or would be less than 60% after taking into account such occurrence; provided, however, such restriction shall cease to apply with respect to any Plan Year, effective as of the first day of the Plan
Year, upon payment by the Company or the Employers of a 

  
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contribution as described in Section 436(b)(2) of the Code. For purposes of this subsection 7.3(d), the term “unpredictable contingent event benefit” means any benefit payable
solely by reason of a plant shutdown (or similar event, as determined by the Secretary of the Treasury), or any event other than the attainment of any age, performance of any service, receipt or derivation of any compensation, or occurrence of death
or disability. 
 (e) To avoid benefit restrictions, the Company may take any action permitted by Section 436 of the Code and the
regulations promulgated thereunder. 
 (f) The provisions of this subsection 7.3 are intended to comply with Section 436 of the Code
and any regulations promulgated thereunder, and shall be construed to comply therewith. 
 ARTICLE 8 

SERVICE ANNUITY FUND 
 The Service
Annuity Fund is the Service Annuity Fund created by the Company for the payment of Service Annuities. All contributions under this Plan shall be paid to the Trustee. The Trustee shall hold all monies and other property received by it and shall
invest and reinvest the same, together with the income therefrom, on behalf of the Participants collectively in accordance with the directions of the Investment Office. The Investment Office shall be a “named fiduciary” under the Plan for
purposes of ERISA and, as such, may, in its discretion, delegate to one or more investment managers, as defined in ERISA, the authority to hold, manage, acquire and dispose of all or any part of the Service Annuity Fund. Any investment manager
appointed by the Investment Office pursuant to this Article 8 which is a bank or trust company supervised by a State or Federal agency is authorized and empowered to invest and reinvest all or any part of the Service Annuity Fund allocated to it for
investment in any 

  
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common, collective or commingled trust qualified under the provisions of Section 401(a) and exempt from tax under Section 501(a) of the Code which is maintained by such investment
manager (“common trust”). During such period of time as all or any portion of the Service Annuity Fund shall be invested in a common trust, the trust document governing such common trust shall govern any investment therein and such trust
document shall be a part hereof. Investment of the common trust in deposits of the trustee of the common trust is hereby expressly authorized. 

In addition, the Investment Office is authorized and empowered to direct the Trustee as to the investment and reinvestment all or any part of
the Service Annuity Fund in the Commonwealth Edison Pooled Fund (the “Pooled Fund”). During such period of time as all or any portion of the Service Annuity Fund is invested in the Pooled Fund, the trust document governing the Pooled Fund
shall govern any investment therein and such trust document shall be a part hereof. On and after November 1, 2010, the Service Annuity Fund shall be invested in the Exelon Corporation Pension Master Retirement Trust (the “Master
Trust”), which is an amendment and restatement of the Pooled Fund, and the Master Trust document shall govern any investment therein. The Investment Office may delegate to one or more investment managers, as defined in ERISA, the authority to
hold, manage, acquire and dispose of all or any part of the Service Annuity Fund invested in the Pooled Fund or, on and after November 1, 2010, in the Master Trust. 

The Trustee shall make distributions from the Service Annuity Fund at such time or times to such person or persons and in such amounts as the
Administrator shall direct in accordance with this Plan. 

  
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 ARTICLE 9 

SPECIAL RULES RELATING TO PARTICIPATION OF AND DISTRIBUTION TO 

CERTAIN TERMINATED OR TRANSFERRED EMPLOYEES 

Section 9.1. Employment After Commencement of Service Annuity. A retired Employee or former Employee, other than an Employee
described in either of the following paragraphs, receiving, or eligible to begin receiving, a Service Annuity may be employed in any business, including that of an Employer or an Affiliate, without in any way affecting the payment to him or her of
his or her Service Annuity, provided however, that if he or she is employed by an Employer or an Affiliate, such employment satisfies the applicable conditions for continuation of payment of retirement benefits as set forth in the Company’s
policy regarding the rehiring of retirees. 
 A retired bargaining unit Employee or former bargaining unit Employee, if such bargaining unit
Employee was a member of Local Union 15 (or a predecessor union), International Brotherhood of Electrical Workers, receiving a Service Annuity may be employed in any business, other than that of the Company, without in any way affecting the payment
to him or her of his or her Service Annuity. Such retired bargaining unit Employee, or former bargaining unit Employee, receiving a Service Annuity may be employed in the temporary service of an Employer or an Affiliate, but, except as otherwise
provided in paragraph (b) of Section 5.2, during the term of such employment, he or she shall not receive any Service Annuity payments unless such employment is for less than 40 Hours of Service per calendar month. Upon the conclusion of
such temporary service employment, Service Annuity payments shall again be made to him or her, as described in Section 9.4 (relating to suspension of Service Annuities). 

  
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 Notwithstanding anything contained herein to the contrary, a retired Employee or former Employee
who becomes re-employed by an Employer or an Affiliate after his or her Service Annuity payments have commenced shall not, under any circumstances, have the right to elect to participate in the Exelon Corporation Cash Balance Pension Plan or the
Exelon Corporation Pension Plan for Bargaining Unit Employees or any plan sponsored by CEG. In addition, a retired Employee or former Employee who becomes re-employed by an Employer after payments have begun to be paid to him or her under the Exelon
Corporation Cash Balance Pension Plan or the Exelon Corporation Pension Plan for Bargaining Unit Employees or any plan sponsored by CEG shall not, under any circumstances, have the right to elect to participate in this Plan. 

Section 9.2. Social Security Increases. The Service Annuity of a Retiree or a Participant who has terminated employment under
circumstances that entitle the Participant to a deferred Service Annuity under Section 5.7 (relating to deferred vested termination) shall not be recomputed to reflect any change in the benefit levels payable under Title II of the Federal
Social Security Act or any change in the wage base under such Title II if such change takes place after the earlier of the date payment of such Service Annuity commences or the date of such termination, as the case may be. 

Section 9.3. Leased Employees. A leased employee (within the meaning of section 414(n)(2) of the Code) shall not be eligible to
participate in the Plan. If a person who performed services as a leased employee (as defined below) of any Employer or Affiliate becomes an Employee, or if an Employee becomes such a leased employee, then any period during which such services were
so performed shall be taken into account solely for the purposes of determining whether and when such person is eligible to participate in this Plan under 

  
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Article 3 (relating to participation), measuring such person’s years of Vesting Service and determining when such person has terminated his or her employment for purposes of
Article 5 (relating to Service Annuities) and Article 6 (relating to Service Annuity forms) to the same extent it would have been had such service been as an Employee. In addition, any contributions or benefits provided under another plan to
such leased employee by his or her leasing organization shall be treated as provided under this Plan and shall be taken into account under Section 7.1 to the extent required under Section 1.415(a)-1(f)(3) of the Regulations. This
Section 9.3 shall not apply to any period of service during which such a leased employee was covered by a plan described in Section 414(n)(5) of the Code and during which the total number of leased employees did not constitute more than
20% of the Employer’s non-highly compensated work force within the meaning of Section 414(n)(1)(C)(ii) of the Code. For purposes of this Plan, a “leased employee” shall mean any person who is not an employee of an Employer and
who pursuant to an agreement between an Employer or Affiliate has performed services for an Employer or an Affiliate on a substantially full-time basis for a period of at least one year, which services were performed under the primary direction or
control of an Employer or an Affiliate. 
 Section 9.4. Suspension of Service Annuities. (a) Notwithstanding anything
contained in the Plan to the contrary and except as provided in paragraph (b) of Section 5.2 (relating to special rule for Participants who attain age 70-1/2 while employed), a Participant who remains an Employee after the
Participant’s Normal Retirement Age without having any Termination of Employment that results in the Participant beginning to receive his or her Service Annuity shall not be entitled to receive any Service Annuity for any calendar month of
employment by an Employer or an Affiliate during which the Participant completes at least 40 Hours 

  
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of Service. If the Service Annuity payments of a Participant described in the preceding sentence or a Participant described in either of the second or third paragraph of Section 9.1
(relating to employment after commencement of Service Annuity System) are suspended, then such payments shall resume at the earlier of (i) such Participant’s actual retirement, or (ii) such Participant’s ceasing to work 40 Hours
of Service or more per calendar month. A Participant’s Service Annuity payments which have been suspended pursuant to this Section 9.4 or Section 9.1 (relating to employment after commencement of Service Annuity System) shall be
resumed not later than the third calendar month after the calendar month in which the Participant ceases to be employed as described in the preceding sentence. The initial payment upon resumption of the Service Annuity payments shall include any
amounts withheld during the period between the cessation of the period during which his or her Service Annuity was suspended and the resumption of payments, but shall not be actuarially adjusted for such delay in resumption of his or Service Annuity
nor shall any Service Annuity payment be made with respect to any month during which his or her Service Annuity was suspended pursuant to this Section 9.4 or Section 9.1 (relating to employment after commencement of Service Annuity
System). 
 (b) No Service Annuity shall be suspended under this Section 9.4 or Section 9.1 (relating to employment after
commencement of Service Annuity System) unless the Participant is notified by personal delivery or first class mail during the first calendar month or payroll period in which the Service Annuity is being suspended. Such notice will contain such
information as may from time to time be required by Section 2530.203-3(b)(4) of the regulations of the Department of Labor or any amendment thereto. 

  
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 (c) If a Participant erroneously receives Service Annuity payments for a month during which such
payments should have been suspended pursuant to this Section 9.4 or Section 9.1 (relating to employment after commencement of Service Annuity System), then the Administrator may deduct from future Service Annuity payments such erroneously
received payments. However, no such deduction may exceed in any one month 25 percent of that month’s payment to which the Participant or the Participant’s Beneficiary, as the case may be, would have been entitled. 

Section 9.5. Reemployment Before Commencement of Service Annuity. (a) Employees Represented by IBEW Local Union 15.
The following rules shall apply to an Eligible Employee who is a member of a collective bargaining unit represented by IBEW Local Union 15 who incurs a Termination of Employment and who is rehired by an Employer prior to commencing his or her
Service Annuity or any benefits under the Exelon Corporation Pension Plan for Bargaining Unit Employees: 
 (i) Rehire
Date Before Absence of 5 Years. If an Employee terminates employment and is later rehired by an Employer before having an absence from employment with the Employers and their Affiliates of five years and, on the date of such Employee’s
rehire, the Employee is a member of a collective bargaining unit represented by IBEW Local Union 15, then either: (1) if such Employee was a Participant on the date his or her employment terminated, such Employee shall become a Participant in
the Plan as of his or her rehire date or (2) if such Employee was not a Participant on the date his or her employment terminated, such Employee shall not be an Eligible Employee and shall not become a Participant. 

(ii) Rehire Date After Absence of at Least 5 Years. If an Eligible Employee terminates employment, regardless of whether
such Eligible Employee was a Participant on the date that his or her employment terminated, and is later rehired by an Employer after having an absence from employment with the Employers and their Affiliates of at least five years and, on the date
of such Employee’s rehire, the Employee is a member of a collective bargaining unit represented by IBEW Local Union 15, such Eligible Employee shall (A) if he or she was a Participant with a vested Service Annuity as of his or her
termination date, become a Participant as of his or her rehire date, (B) if he or she was not a Participant as of his or her termination date and was a participant entitled to a vested benefit under the Exelon Corporation Pension Plan for
Bargaining Unit Employees as of his or her termination date, he or she shall not be an Eligible Employee and shall not become a Participant, or (C) if he or she was neither a 

  
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Participant with a vested Service Annuity nor a participant entitled to a vested benefit under the Exelon Corporation Pension Plan for Bargaining Unit Employees as of his or her termination date,
then, (1) if he or she is rehired prior to January 1, 2009, be permitted to elect, in accordance with procedures established by the Administrator or, for periods prior to June 1, 2006, the ‘Committee’, as such term was
defined in the Plan prior to such date, to participate in the Plan or the Exelon Corporation Pension Plan for Bargaining Unit Employees as of his or her rehire date, or (2) if he or she is rehired on or after January 1, 2009, he or she
shall not be an Eligible Employee and shall not become a Participant. 
 (b) Management Employees. The following rules shall apply to
an Eligible Employee who is not a member of a collective bargaining unit represented by IBEW Local Union 15 and who is rehired by an Employer after a Termination of Employment and prior to commencing his or her Service Annuity or any benefits under
the Exelon Corporation Cash Balance Pension Plan, as applicable: 
 (i) Rehire Date Before Absence of 5 Years. If an
Employee terminates employment and is later rehired by an Employer before having an absence from employment with the Employers and their Affiliates of five years and, on the date of his or her rehire, such Employee is not a member of a collective
bargaining unit represented by IBEW Local Union 15, then either: (1) if such Employee was a Participant on the date his or her employment terminated, such Employee shall be Participant in the Plan as of his or her rehire date if he or she is
then an Eligible Employee or (2) if such Employee was not a Participant on the date his or her employment terminated, such Employee shall not be an Eligible Employee and shall not become a Participant. Notwithstanding clause (1) of the
preceding sentence, if an Eligible Employee described in the preceding sentence was not at any time permitted to make the election described in Section 3.2(a) or was permitted to make such election and elected to participate in the Exelon
Corporation Cash Balance Pension Plan but such election was not given effect as a result of such Employee’s Termination of Employment, such Eligible Employee shall be permitted to elect, in the time and manner prescribed by the Administrator
or, for periods prior to June 1, 2006, the ‘Committee’, as such term was defined in the Plan prior to such date, to either (1) participate in the Plan as of his or her rehire date or (2) participate in the Exelon Corporation
Cash Balance Pension Plan at the time prescribed therein and have his or her Service Annuity and related assets transferred to such plan in the manner described in Section 3.2(b). 

  
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 (ii) Rehire Date After Absence of at Least 5 Years. If an Employee
terminates employment with the Employers and their Affiliates and the Employee was not a Participant or was a Participant who did not have a vested Service Annuity as of the date his or her employment terminated, and such Employee is rehired by an
Employer after having an absence from employment with the Employers and their Affiliates of at least five years and, on the date of his or her rehire, such Employee is not a member of a collective bargaining unit represented by IBEW Local Union 15,
such Employee shall not be an Eligible Employee and shall not become a Participant upon such rehire. If a Participant with a vested Service Annuity terminates employment with the Employers and their Affiliates and the Participant is rehired after
having an absence from employment with the Employers and their Affiliates of at least five years, such Participant shall remain a Participant upon his or her rehire. Notwithstanding the preceding sentence if a Participant described in the preceding
sentence was not at any time permitted to make the election described in Section 3.2(a) or was permitted to make such election and elected to participate in the Exelon Corporation Cash Balance Pension Plan but such election was not given effect
as a result of such Employee’s Termination of Employment, such Eligible Employee shall be permitted to elect, in the time and manner prescribed by the Administrator or, for periods prior to June 1, 2006, the ‘Committee’, as such
term was defined in the Plan prior to such date, to either (1) participate in the Plan as of his or her rehire date or (2) participate in the Exelon Corporation Cash Balance Pension Plan at the time prescribed therein and have his or her
Service Annuity and related assets transferred to such plan in the manner described in Section 3.2(b). 
 Section 9.6.
Employees whose Representation by IBEW Local Union 15 Changes. Except as provided in the last paragraph of Section 9.1 (relating to employment after commencement of Service Annuity) if an Employee who, on the day he or she first performed
an Hour of Service with an Employer, was not a member of a collective bargaining unit represented by IBEW Local Union 15 and was not an Eligible Employee later becomes an Eligible Employee as a result of becoming a member of a collective bargaining
unit represented by IBEW Local Union 15 and being employed at a facility that, as of October 19, 2000, was owned by Commonwealth Edison Company, Unicom Corporation or any affiliate of Unicom Corporation, such Employee shall become a Participant
as of the date he or she first becomes a member of a collective bargaining unit represented by IBEW Local Union 15, provided that such Employee becomes a member of a collective bargaining unit represented by IBEW Local Union 15 prior to
January 1, 2009 and does not elect, in the time and manner prescribed by the Administrator or, for periods prior to June 1, 2006, the ‘Committee’, as such term was defined in the Plan prior to

  
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such date for such an election, to participate in the Exelon Corporation Pension Plan for Bargaining Unit Employees. Except as provided in the last paragraph of Section 9.1 (relating to
employment after commencement of Service Annuity) if an Employee who was a member of a collective bargaining unit represented by IBEW Local Union 15 and who first became employed by an Employer prior to January 1, 2001 later ceases to be a
member of a collective bargaining unit represented by IBEW Local Union 15, such Employee shall be permitted to elect, in the time and manner prescribed by the Administrator or, for periods prior to June 1, 2006, the ‘Committee’, as
such term was defined in the Plan prior to such date, to either (a) continue to participate in the Plan as of the date he or she ceases to be a member of a collective bargaining unit represented by IBEW Local Union 15 or (b) participate in
the Exelon Corporation Cash Balance Pension Plan at the time prescribed therein and have his or her Service Annuity and related assets transferred to such plan in the manner described in Section 3.2(b). 

Section 9.7. Transfer of Employment to or Reemployment in Positions Eligible for Participation in the Plan or the Service Annuity Plan
of PECO Energy Company by Certain Individuals Who Were Participants in Such a Plan on December 31, 2000. If a Participant who was a Participant on December 31, 2000 transfers employment to or is reemployed by an Employer or an
Affiliate in a job classification with respect to which similarly situated employees of such Employer or Affiliate are not eligible to participate in the Plan but are instead eligible to participate in the Service Annuity Plan of PECO Energy Company
(or would be so eligible but for their election to participate in the Exelon Corporation Cash Balance Pension Plan), then such individual shall upon such transfer or reemployment remain a Participant in the Plan and shall not participate in the
Service Annuity Plan of PECO Energy Company. If a participant in the Service Annuity Plan of PECO Energy Company who was a participant in such 

  
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plan on December 31, 2000 transfers employment to or is reemployed by an Employer or an Affiliate in a management job classification with respect to which similarly situated employees of
such Employer or Affiliate are not eligible to participate in such plan but are instead eligible to participate in the Plan (or would be so eligible but for their election to participate in the Exelon Corporation Cash Balance Pension Plan), then
such individual shall upon such transfer or reemployment remain a participant in the Service Annuity Plan of PECO Energy Company and shall not participate in the Plan. 

Section 9.8. Change in Employment Status or Transfer to Affiliate. Except as otherwise provided in Sections 9.9, 9.10 and
elsewhere in the Plan, if an Employee who was a Participant transfers employment to or is reemployed by an Employer or an Affiliate in a job classification with respect to which similarly situated employees of such Employer or Affiliate are not
eligible to participate in the Plan but are instead either eligible to participate in another plan maintained by such Employer or Affiliate or are not eligible to participate in any plan, then such individual shall upon such transfer or reemployment
participate in the plan, if any, determined pursuant to rules established by the Company, which rules may be set forth in a Supplement hereto. 

Section 9.9. Certain Rehired Employees. Notwithstanding anything contained herein to the contrary, an Employee who is reemployed
by an Employer after December 1, 2012 and has received a Special Lump Sum Payment or an Immediately Commencing Annuity in accordance with Section 6.9 (relating to Special Lump Sum Payment Option) shall not be eligible to become a
Participant pursuant to Article 3. 

  
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 Section 9.10. Transfer of Employment to or from Facilities formerly Owned by CEG. Effective
as of the Effective time (as such term is defined in the Merger Agreement), if a Participant who was a Participant on or prior to the Effective Time transfers employment to or is reemployed by an Employer or an Affiliate in a job classification with
respect to which similarly situated employees of such Employer or Affiliate are not eligible to participate in the Plan but are instead eligible to participate in a Company Benefit Plan (as such term is defined in the Merger Agreement) that is
intended to be a defined benefit pension plan qualified under Section 401(a) of the Code (each such plan, a “CEG Pension Plan”) , then such individual shall upon such transfer or reemployment remain a Participant in the Plan and shall
not participate in the CEG Pension Plan. If a participant in the CEG Pension Plan who was a participant in such plan on or prior to the Effective Time transfers employment to or is reemployed by an Employer or an Affiliate in a job classification
with respect to which similarly situated employees of such Employer or Affiliate are not eligible to participate in such plan but are instead eligible to participate in the Plan, then such individual shall upon such transfer or reemployment remain a
participant in the CEG Pension Plan and shall not participate in the Plan. 

  
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 ARTICLE 10 

ADMINISTRATION 

Section 10.1. The Administrator, the Investment Office and the Corporate Investment Committee. (a) The Administrator.
The Company, acting through its Vice President, Health & Benefits, or such other person or committee appointed by the Chief Human Resources Officer from time to time (such vice president or other person or committee, the
“Administrator”), shall be the “administrator” of the Plan, within the meaning of such term as used in ERISA. In addition, the Administrator shall be 

the “named fiduciary” of the Plan, within the meaning of such term as used in ERISA, solely with respect to administrative matters involving the Plan
and not with respect to any investment of the Plan’s assets. The Administrator shall have the following duties, responsibilities and rights: 

(i) The Administrator shall have the duty and discretionary authority to interpret and construe this Plan in regard to all
questions of eligibility, the status and rights of Participants, Retirees, Beneficiaries and other persons under this Plan, and the manner, time, and amount of payment of any distributions under this Plan. The determination of the Administrator with
respect to an Employee’s years of Credited Service, the amount of the Employee’s Earnings, Highest Average Annual Pay, Federal Benefit and any other matter affecting payments under the Plan shall be final and binding. Benefits under the
Plan shall be paid to a Participant or Beneficiary only if the Administrator, in his or her discretion, determines that such person is entitled to benefits. 

(ii) Each Employer shall, from time to time, upon request of the Administrator, furnish to the Administrator such data and
information as the Administrator shall require in the performance of his or her duties. 
 (iii) The Administrator shall
direct the Trustee to make payments of amounts to be distributed from the Trust under Article 6 (relating to Service Annuity forms). In addition, it shall be the duty of the Administrator to certify to the Trustee the names and addresses of all
Retirees, the amounts of all Service Annuities, the dates of death of Retirees and all proceedings and acts of the Administrator necessary or desirable for the Trustee to be fully informed as to the Service Annuities to be paid out of the Service
Annuity Fund. 
 (iv) The Administrator shall have all powers and responsibilities necessary to administer the Plan, except
those powers that are specifically vested in the Investment Office, the Corporate Investment Committee or the Trustee. 
 (v)
The Administrator may require a Participant or Beneficiary to complete and file certain applications or forms approved by the Administrator and to furnish such information requested by the Administrator. The Administrator and the Plan may rely upon
all such information so furnished to the Administrator. 
 (vi) The Administrator shall be the Plan’s agent for service
of legal process and forward all necessary communications to the Trustee. 

  
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 (b) Removal of Administrator. The Chief Human Resources Officer shall have the right at
any time, with or without cause, to remove the Administrator (including any member of a committee that constitutes the Administrator). The Administrator may resign and the resignation shall be effective upon delivery of the written resignation to
the Chief Human Resources Officer or upon the Administrator’s termination of employment with the Employers. Upon the resignation, removal or failure or inability for any reason of the Administrator to act hereunder, the Chief Human Resources
Officer shall appoint a successor. Any successor Administrator shall have all the rights, privileges and duties of the predecessor, but shall not be held accountable for the acts of the predecessor. None of the Company, any officer, employee or
member of the board of directors of the Company who is not the Chief Human Resources Officer, nor any other person shall have any responsibility regarding the retention or removal of the Administrator. 

(c) The Investment Office. The Investment Office shall be the “named fiduciary” of the Plan, within the meaning of such term
as used in ERISA, solely with respect to matters involving the investment of assets of the Plan and, any contrary provision of the Plan notwithstanding, in all events subject to the limitations contained in Sections 404(a)(2) of ERISA and the terms
of the Plan and all other applicable limitations. In addition to the duties, responsibilities and rights of the Investment Office set forth in Article 8, the Investment Office shall have the following duties, responsibilities and rights: 

(i) The Investment Office shall be the “named fiduciary” for purposes of directing the Trustee as to the investment
of amounts held in the Trust Fund and for purposes of appointing one or more investment managers as described in ERISA. 

(ii) The Investment Office shall submit to the Corporate Investment Committee annual manager review results and such other
reports and documents as may be necessary for the Corporate Investment Committee to monitor the activities and performance of the Investment Office. 

(iii) Each Employer shall, from time to time, upon request of the Investment Office, furnish to the Investment Office such data
and information as the Investment Office shall require in the performance of its duties. 

  
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 (d) The Corporate Investment Committee. The Company acting through the Corporate
Investment Committee shall be responsible for overall monitoring of the performance of the Investment Office. The Corporate Investment Committee shall have the following duties, responsibilities and rights: 

(i) The Corporate Investment Committee shall monitor the activities and performance of the Investment Office and shall review
annual manager review results and any other reports and documents submitted by the Investment Office. 
 (ii) The Corporate
Investment Committee shall have authority to approve asset allocation recommendations of the Investment Office, and approve the retention or firing of any investment consultant (but not any investment manager), custodian or trustee, as recommended
by the Investment Office. 
 (iii) The Corporate Investment Committee and the Company’s Chief Investment Officer shall
have the right at any time, with or without cause, to remove one or more employees of the Exelon Investment Office or to appoint another person or committee to act as Investment Office. Any successor Investment Office employee shall have all the
rights, privileges and duties of the predecessor, but shall not be held accountable for the acts of the predecessor. 
 The power and authority of the
Corporate Investment Committee with respect to the Plan shall be limited solely to the monitoring and removal of the employees of the Investment Office and approval of the recommendations specified in clause (ii) above. The Corporate Investment
Committee shall have no responsibility for making investment decisions, appointing or firing investment managers or for any other duties or responsibilities with respect to the Plan, other than those specifically listed herein. 

(e) Status of Administrator, the Investment Office and the Corporate Investment Committee. The Administrator, any person acting as, or
on behalf of, the Investment Office, and any member of the Corporate Investment Committee may, but need not, be an Employee, trustee or officer of an Employer and such status shall not disqualify such person from taking any action

  
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hereunder or render such person accountable for any distribution or other material advantage received by him or her under this Plan, provided that no Administrator, person acting as, or on behalf
of, the Investment Office, or any member of the Corporate Investment Committee who is a Participant shall take part in any action of the Administrator or the Investment Office on any matter involving solely his or her rights under this Plan. 

(f) Notice to Trustee of Members. The Trustee shall be notified as to the names of the Administrator and the person or persons
authorized to act on behalf of the Investment Office. 
 (g) Allocation of Responsibilities. Each of the Administrator, the
Investment Office and the Corporate Investment Committee may allocate their respective responsibilities and may designate any person, persons, partnership or corporation to carry out any of such responsibilities with respect to the Plan. Any such
allocation or designation shall be reduced to writing and such writing shall be kept with the records of the Plan. 
 (h) General
Governance. The Corporate Investment Committee shall elect one of its members as chairman and appoint a secretary, who may or may not be a member of such Committee. All decisions of the Corporate Investment Committee shall be made by the
majority, including actions taken by written consent. The Administrator, the Investment Office and the Corporate Investment Committee may adopt such rules and procedures as it deems desirable for the conduct of its affairs, provided that any such
rules and procedures shall be consistent with the provisions of the Plan. 

  
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 (i) Indemnification. The Employers hereby jointly and severally indemnify the
Administrator, the persons employed in the Exelon Investment Office, the members of the Corporate Investment Committee, the Chief Human Resources Officer, and the directors, officers and employees of the Employers and each of them, from the effects
and consequences of their acts, omissions and conduct in their official capacity with respect to the Plan (including but not limited to judgments, attorney fees and costs with respect to any and all related claims, subject to the Company’s
notice of and right to direct any litigation, select any counsel or advisor, and approve any settlement), except to the extent that such effects and consequences result from their own willful misconduct. The foregoing indemnification shall be in
addition to (and secondary to) such other rights such persons may enjoy as a matter of law or by reason of insurance coverage of any kind. 

(j) No Compensation. None of the Administrator, any person employed in the Exelon Investment Office nor any member of the Corporate
Investment Committee may receive any compensation or fee from the Plan for services as the Administrator, Investment Office or a member of the Corporate Investment Committee; provided, however that nothing contained herein shall preclude the Plan
from reimbursing the Company or any Affiliate for compensation paid to any such person if such compensation constitutes “direct expenses” for purposes of ERISA. The Employers shall reimburse the Administrator, the persons employed in the
Exelon Investment Office and the members of the Corporate Investment Committee for any reasonable expenditures incurred in the discharge of their duties hereunder. 

(k) Employ of Counsel and Agents. The Administrator, the Investment Office and the Corporate Investment Committee may employ such
counsel (who may be counsel for an Employer) and agents and may arrange for such clerical and other services as each may require in carrying out its respective duties under the Plan. 

  
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 Section 10.2. Claims Procedure. Any Participant or distributee who believes he or she
is entitled to benefits in an amount greater than those which he or she is receiving or has received may file a claim with the Administrator. Such a claim shall be in writing and state the nature of the claim, the facts supporting the claim, the
amount claimed, and the address of the claimant. The Administrator shall review the claim and, unless special circumstances require an extension of time, within 90 days after receipt of the claim, give notice to the claimant, either in writing by
registered or certified mail or in an electronic notification, of the Administrator’s decision with respect to the claim. Any electronic notice delivered to the claimant shall comply with the standards imposed by applicable Regulations. If the
Administrator determines that special circumstances require an extension of time for processing the claim, the claimant shall be so advised in writing within the initial 90-day period and in no event shall such an extension exceed 90 days. The
extension notice shall indicate the special circumstances requiring an extension of time and the date by which the Administrator expects to render the benefit determination. The notice of the decision of the Administrator with respect to the claim
shall be written in a manner calculated to be understood by the claimant and, if the claim is wholly or partially denied, the Administrator shall notify the claimant of the adverse benefit determination and shall set forth the specific reasons for
the adverse determination, the references to the specific Plan provisions on which the determination is based, a description of any additional material or information necessary for the claimant to perfect the claim, an explanation of why such
material or information is necessary, and a description of the claim review procedure under the Plan and the time limits applicable to such procedures, including a statement of the claimant’s right (subject to the limitations described in
Section 13.8 and 13.9) to bring a civil action under Section 502 of ERISA following an adverse benefit determination on review. The Administrator shall also advise the claimant that the claimant or the claimant’s duly authorized
representative may request a review by the Chief Human Resources Officer (or such other officer 

  
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designated from time to time by the Chief Human Resources Officer) of the adverse benefit determination by filing with such officer, within 60 days after receipt of a notification of an adverse
benefit determination, a written request for such review. The claimant shall be informed that, within the same 60-day period, he or she (a) may be provided, upon request and free of charge, reasonable access to, and copies of, all documents,
records and other information relevant to the claimant’s claim for benefits and (b) may submit to the officer written comments, documents, records and other information relating to the claim for benefits. If a request is so filed, review
of the adverse benefit determination shall be made by the officer within, unless special circumstances require an extension of time, 60 days after receipt of such request, and the claimant shall be given written notice of the officer’s final
decision. If the officer determines that special circumstances require an extension of time for processing the claim, the claimant shall be so advised in writing within the initial 60-day period and in no event shall such an extension exceed 60
days. The extension notice shall indicate the special circumstances requiring an extension of time and the date by which the officer expects to render the determination on review. The review of the officer shall take into account all comments,
documents, records and other information submitted by the claimant relating to the claim, without regard to whether such information was submitted or considered in the initial benefit determination. The notice of the final decision shall include
specific reasons for the determination and references to the specific Plan provisions on which the determination is based and shall be written in a manner calculated to be understood by the claimant. 

  
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 Section 10.3. Procedures for Domestic Relations Orders. If the Administrator shall
receive any judgment, decree or order (including approval of a property settlement agreement) pursuant to State domestic relations or community property law relating to the provision of child support, alimony or marital property rights of a spouse,
former spouse, child or other dependent of a Participant and purporting to provide for the payment of all or a portion of the Participant’s Service Annuity to or on behalf of one or more of such persons (such judgment, decree or order being
hereinafter called a “domestic relations order”), the Administrator shall promptly notify the Participant and each other payee specified in such domestic relations order of its receipt and of the following procedures. After receipt of a
domestic relations order, the Administrator shall determine whether such order constitutes a “qualified domestic relations order” as defined in paragraph (b) of Section 13.2, and shall notify the Participant and each payee named
in such order in writing of the Administrator’s determination within a reasonable time after receipt of such order. Such notice shall be written in a manner calculated to be understood by the parties and shall contain an explanation of the
review procedure under this Plan. If the Administrator determines that the order is not a “qualified domestic relations order,” such notice also shall set forth specific reasons for the Administrator’s determination. The Administrator
shall advise each party that each party or a duly authorized representative of such party may request a review by the Chief Human Resources Officer (or such other officer designated from time to time by the Chief Human Resources Officer) of the
Administrator’s determination by filing with such officer within 60 days of receipt of the Administrator’s determination a written request for such review. The Administrator shall give every party affected by any such request for review
notice of such request. Each party also shall be informed that he or she may have reasonable access to pertinent documents and submit comments in writing to the officer in connection with such request for review. Within 60 days after a request for
review, each party shall be given written notice of the officer’s final determination, which notice shall be written in a manner calculated to be understood by the parties and shall include specific reasons for such final determination. 

  
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 Section 10.4. Computation of Benefits. The benefit formula, factors contained in any
Tables or Schedules and the Federal Benefit taken into account in determining the amount of a Participant’s Service Annuity (including the amount paid under the applicable form of payment of such Service Annuity) or the amount of any surviving
spouse or surviving child annuity payable with respect to any Participant shall be the formula, factors and/or Federal Benefit, as applicable, in effect on the date of the Participant’s Termination of Employment. 

Section 10.5. Actuary to Be Employed. The Company or the Investment Office shall engage an actuary to do such technical and
advisory work as the Company or the Investment Office may request, including analyses of the experience of this Plan from time to time, the preparation of actuarial tables for the making of computations thereunder, and the submission to the Company
or the Investment Office of an annual actuarial report, which report shall contain information showing the financial condition of this Plan, a statement of the contributions to be made by the Employers for the ensuing year, and such other
information as may be requested by the Company or the Investment Office. 
 Section 10.6. Funding Policy. The Company shall
establish a funding policy and method consistent with the objectives of this Plan and the requirements of Title I of ERISA and shall communicate such policy and method, and any changes in such policy and method, to the Investment Office. 

  
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 Section 10.7. Notices to Participants, Etc. All notices, reports and statements
given, made, delivered or transmitted to a Participant or any other person entitled to or claiming benefits under this Plan shall be deemed to have been duly given, made or transmitted when mailed by first class mail with postage prepaid and
addressed to the Participant or such other person at the address last appearing on the records of the Administrator. 

Section 10.8. Notices to Employers or Administrator. Written directions, notices and other communications from Participants or any
other person entitled to or claiming benefits under this Plan to the Employers or Administrator shall be deemed to have been duly given, made or transmitted either when delivered to such location as shall be specified upon the forms prescribed by
the Administrator for the giving of such directions, notices and other communications or when mailed by first class mail with postage prepaid and addressed to the addressee at the address specified upon such forms. 

Section 10.9. Records. Each of the Administrator, the Investment Office and the Corporate Investment Committee shall keep a record
of all of their respective proceedings, if any, and shall keep or cause to be kept all books of account records and other data as may be necessary or advisable in their respective judgment for the administration of the Plan, the administration of
the investments of the Plan or the monitoring of the investment activities of the Plan, as applicable. 
 Section 10.10.
Responsibility to Advise Administrator of Current Address. Each person entitled to receive a payment under this Plan shall file with the Administrator in writing such person’s complete mailing address and each change therein. A check or
communication mailed to any person at such person’s address on file with the Administrator shall be deemed to have been received by such person for all purposes of this Plan. Although neither the Administrator nor the Trustee shall be obliged
to search for or ascertain the location of any 

  
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person, the Administrator shall make reasonable efforts to locate any missing Participant or Beneficiary entitled to benefits hereunder. If the Administrator is in doubt as to whether payments
are being received by the person entitled thereto, it shall, by registered mail addressed to the person concerned at his or her last address known to the Administrator, notify such person that all future payments will be withheld until such person
submits to the Administrator evidence of his or her continued life and proper mailing address. 
 Section 10.11. Electronic
Media. Notwithstanding any provision of the Plan to the contrary and for all purposes of the Plan, to the extent permitted by the Administrator and any applicable law or Regulation, the use of electronic technologies shall be deemed to satisfy
any written notice, consent, delivery, signature, disclosure or recordkeeping requirement under the Plan, the Code or ERISA to the extent permitted by or consistent with applicable law and Regulations. Any transmittal by electronic technology shall
be deemed delivered when successfully sent to the recipient, or such other time specified by the Administrator. 
 Section 10.12.
Correction of Error. If it comes to the attention of the Administrator that an error has been made in the amount of benefits payable, or paid, to any Participant or Beneficiary under the Plan, the Administrator shall be permitted to correct such
error by whatever means that the Administrator, in its sole discretion determines, including by offsetting future benefits payable to the Participant or Beneficiary or requiring repayment of benefits to the Plan, except that no adjustment need be
made with respect to any Participant or Beneficiary whose benefit has been distributed in full prior to the discovery of such error. 

  
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 ARTICLE 11 

PARTICIPATION BY OTHER EMPLOYERS 

Section 11.1. Adoption of Plan. With the consent of the Company, any entity may become a participating Employer under this Plan
with respect to all or a designated group of its employees by taking such action as shall be necessary or desirable to adopt this Plan and executing and delivering such instruments as may be necessary or desirable to put this Plan into effect with
respect to such entity. 
 Section 11.2. Withdrawal from Participation. Any Employer shall terminate its participation in the
Plan at any time, under such circumstances as the Company may provide, by delivering to the Company a duly certified copy of a resolution of its board of directors (or other governing body) to that effect, or by ceasing to be a member of the same
controlled group as the Company (within the meaning of section 1563(a) if the Code). 
 Section 11.3. Company and Administrator
Agent for Employers. Each corporation which shall become a participating Employer pursuant to Section 11.1 (relating to adoption of the Plan) or Article 12 (relating to continuance by a successor) by so doing shall be deemed to have
appointed the Company and the Administrator its agent to exercise on its behalf all of the powers and authorities hereby conferred upon the Company and the Administrator by the terms of this Plan, including, but not by way of limitation, the power
to amend and terminate this Plan. The authority of the Company and the Administrator to act as such agent shall continue unless and until the portion of the Service Annuity Fund held for the benefit of Employees of the particular Employer and their
Beneficiaries is set aside in a separate trust as provided in Section 15.2 (relating to establishment of separate plan). 

  
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 ARTICLE 12 

CONTINUANCE BY A SUCCESSOR 
 In
the event that any Employer shall be reorganized by way of merger, consolidation, transfer of assets or otherwise, so that a corporation, partnership or person other than an Employer shall succeed to all or substantially all of such Employer’s
business, such successor may be substituted for such Employer under this Plan by adopting this Plan and, if necessary, becoming a party to the Service Annuity Fund. Contributions by such Employer shall be automatically suspended from the effective
date of any such reorganization until the date upon which the substitution of such successor corporation for the Employer under this Plan becomes effective. If, within 90 days following the effective date of any such reorganization, such successor
shall not have elected to become a party to this Plan, or if such successor shall adopt a plan of complete liquidation other than in connection with a reorganization, this Plan shall be automatically terminated with respect to employees of such
Employer as of the close of business on the 90th day following the effective date of such reorganization or as of the close of business on the date of adoption of such plan of complete liquidation, as the case may be, and the Administrator shall
direct the Trustee to distribute the portion of the Service Annuity Fund applicable to such Employer in the manner provided in Section 15.2 (relating to establishment of separate plan). 

  
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 ARTICLE 13 

MISCELLANEOUS 
 Section 13.1.
Expenses. The expenses of the Trustee in the administration of the Service Annuity Fund, including compensation, if any, to the Trustee for its services, shall be paid by the Company or the Employers. All costs and expenses incurred in the
operation of the Service Annuity Fund, to the extent not described in the preceding sentence, and all costs and expenses incurred in the operation of the Plan, the Service Annuity Fund, the Pooled Fund or the Master Trust, as applicable, including,
but not limited to, “direct expenses” incurred in administering the Plan, the Service Annuity Fund, the Pooled Fund and the Master Trust (including compensation paid to any employee of an Employer or an Affiliate who is engaged in the
administration of the Plan, the Service Annuity Fund, the Pooled Fund or the Master Trust), the expenses of the Administrator, the Investment Office and the Corporate Investment Committee, the fees of counsel and any agents for the Trustee, the
Administrator, the Investment Office or the Corporate Investment Committee, and the fees of investment managers that manage assets of the Pooled Fund or the Master Trust, as applicable, shall be paid by the Trustee from the Service Annuity Fund or
the Pooled Fund or the Master Trust, as applicable, in such proportion as the Investment Office, in its sole discretion, shall determine, to the extent such expenses are not paid by the Employers and to the extent permitted under ERISA, Regulations
and other applicable laws. Any such expenses that are borne by the Employers shall be paid out of their own funds in such proportions as the Administrator shall determine. In the event that the Company or any other Employer advances money on behalf
of the Service Annuity Fund for the payment of any expenses incurred in the operation of the Plan, the Trustee shall reimburse the Company or such other Employer from the Service Annuity Fund for any amount so advanced, without interest or fees.

 Section 13.2. Non-Assignability. (a) It is a condition of this Plan, and all rights of each Participant, Beneficiary and
Retiree shall be subject thereto, that no right or interest of any Participant, Beneficiary or Retiree in this Plan shall be assignable or transferable in whole or in part, either directly or by operation of law or otherwise, including, but not by
way of 

  
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limitation, execution, levy, garnishment, attachment, pledge or bankruptcy, but excluding devolution by death or mental incompetency, and no right or interest of any Participant, Beneficiary or
Retiree in this Plan shall be liable for, or subject to, any obligation or liability of such Participant, Beneficiary or Retiree, including claims for alimony or the support of any spouse or child, except as provided in paragraph (b) of this
Section 13.2 (relating to exception for qualified domestic relations orders). 
 (b) Exception for Qualified Domestic Relations
Orders. Notwithstanding any provision of this Plan to the contrary, if a Participant’s Service Annuity under this Plan, or any portion thereof, shall be the subject of one or more qualified domestic relations orders, as defined below, such
Service Annuity or portion thereof shall be paid to the person at the time and in the manner specified in any such order. For purposes of this paragraph (b), “qualified domestic relations order” shall mean any “domestic relations
order” as defined in Section 10.3 (relating to procedures for domestic relations orders) which creates (or recognizes the existence of) or assigns to a person other than the Participant (an “alternate payee”) rights to all or a
portion of the Participant’s Service Annuity under this Plan, and: 
 (A) clearly specifies 

(i) the name and last known mailing address (if any) of the Participant and each alternate payee covered by such order, 

(ii) the amount or percentage of the Participant’s Service Annuity to be paid by this Plan to each such alternate payee,
or the manner in which such amount or percentage is to be determined, 
 (iii) the number of payments to, or period of time
for which, such order applies, and 
 (iv) each plan to which such order applies; 

  
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 (B) does not require 

(i) this Plan to provide any type or form of benefit or any option not otherwise provided under this Plan at the time such
order is issued, 
 (ii) this Plan to provide increased benefits (determined on the basis of actuarial equivalence), or 

(iii) the payment of benefits to an alternate payee which at the time such order is issued already are required to be paid to a
different alternate payee under a prior qualified domestic relations order; and 
 (C) does not require the payment of
benefits to any alternate payee before the first to occur of (i) the earliest date as of which payment of the Participant’s Service Annuity could commence after his or her Termination of Employment, and (ii) the Participant’s
attainment of age 50, 
 all as determined by the Company pursuant to the procedures contained in Section 10.3 (relating to procedures for domestic
relations orders). Any amounts subject to a domestic relations order prior to determination of its status as a qualified domestic relations order which but for such order would be paid to the Participant shall be segregated in a separate account or
an escrow account pending such determination. If, within a reasonable time after receipt of written evidence of such order by the Company, it is determined that a domestic relations order constitutes a qualified domestic relations order, the amount
so segregated (plus any interest thereon) shall be paid to the alternate payee in accordance with the terms of the order. If, within a reasonable time after receipt of a domestic relations order by the Company, it is determined that a domestic
relations order does not constitute a qualified domestic relations order, then the amount so segregated (plus any interest thereon) shall, as soon as practicable, be paid to the Participant. Any subsequent determination that such order constitutes a
qualified domestic relations order shall apply only to payments made on or after the date of such subsequent determination. 

  
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 Section 13.3. Employment Non-Contractual. Neither this Plan nor any action taken by
the Administrator or the Investment Office confers any right upon any Employee to continue in employment with any Employer. 

Section 13.4. Limitation of Rights. No Participant, Beneficiary or Retiree shall have any right, title, interest or claim in or to
any part of the Service Annuity Fund at any time, but shall have the right only to distributions from the Service Annuity Fund on the terms and conditions herein provided. Neither this Plan nor any action taken by the Administrator or the Investment
Office shall obligate any Employer to make contributions to the Service Annuity Fund in excess of the contributions authorized by the board of directors of the Company or create any liability on an Employer for the payment of Service Annuities under
this Plan. 
 Section 13.5. Merger or Consolidation with or Transfer to Another Plan. A merger or consolidation with, or
transfer of assets or liabilities to, any other Plan shall not be effected unless the terms of such merger, consolidation or transfer are such that each Participant, Beneficiary, Retiree or other person entitled to receive benefits from this Plan
would, if this Plan were to terminate immediately after the merger, consolidation or transfer, receive a benefit equal to or greater than the benefit such person would be entitled to receive if this Plan were to terminate immediately before the
merger, consolidation, or transfer. 
 If an Employee or a group of Employees ceases to be an Employee or Employees of an Employer and
becomes an employee or employees of an Affiliate that is not an Employer but that maintains its own pension plan, there shall be transferred from the Service Annuity Fund to the trust fund for the pension plan of such Affiliate assets in an amount
equal to the proportion of the amount of the total assets of the Service Annuity Fund, after deducting therefrom the 

  
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amount actuarially determined to be necessary for the payment in full of Service Annuities theretofore granted to all Retirees and Participants, which the actuarial reserve allocable to such
Employee or such group of Employees, as the case may be, bears to the actuarial reserve allocable to all Employees. If, however, any such group of Employees shall include all of the Employees of all Employers, all of the assets of the Service
Annuity Fund shall be so transferred. 
 If and when a separate pension plan and trust fund is created by the Company for supervisory,
administrative and management Employees, there shall be transferred from the Service Annuity Fund to such separate trust fund assets in an amount equal to the sum of (a) that proportion of the amount of the total assets of the Service Annuity
Fund, after deducting therefrom the amount actuarially determined to be necessary for the payment in full of Service Annuities theretofore granted to all Retirees and Participants, which the actuarial reserve allocable to such supervisory,
administrative and management Employees bears to the actuarial reserve allocable to all Employees, and (b) the amount of assets actuarially determined to be necessary for the payment in full of Service Annuities theretofore granted to Retirees
who were supervisory, administrative or management Employees at the time of the granting of such Service Annuities. If and when an Employee shall thereafter be transferred to or from the management payroll, there shall be transferred from the
Service Annuity Fund to such separate trust fund or from such separate trust fund to the Service Annuity Fund, as the case may be, assets in an amount determined in the same manner as described in the preceding sentence (and the Employee’s
Service Annuity or benefits in the nature of a service annuity shall subsequently be paid out of the Service Annuity Fund or such separate trust fund, as the case may be). 

  
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 If and when an employee or a group of employees of an Affiliate that is not an Employer shall
cease to be an employee or employees of such Affiliate and shall become an Employee or Employees of an Employer, the Trustee under the Service Annuity Fund shall accept, upon transfer from the trust fund of the pension plan of such Affiliate, assets
in an amount equivalent to that proportion of the amount of the total assets of such trust fund, after deducting therefrom the amount actuarially determined to be necessary for the payment in full of benefits theretofore granted, which the actuarial
reserve allocable to such Employee or such groups of Employees, as the case may be, bears to the actuarial reserve allocable to all employees. If, however, any such group of Employees shall include all of the employees of such Affiliate, all of the
assets of such trust fund shall be so accepted. 
 In the case of each transfer of assets made or accepted pursuant to the provisions of
this Section 13.5, the amount of the total assets and (if less than all assets are to be transferred) the proportion thereof to be transferred shall be determined as of a date not earlier than December 31 of the preceding calendar year.

 All assets accepted, upon transfer, by the Trustee under the Service Annuity Fund, pursuant to the provisions of this Section 13.5,
shall be held and applied in accordance with the provisions of the Trust Agreement relating to the Service Annuity Fund. 

Section 13.6. Medical Examination. A Participant or Beneficiary for whom a determination or verification of physical or medical
condition is in the opinion of the Administrator relevant to the application of this Plan shall, if and when reasonably requested by the Administrator, submit to medical examination by a physician appointed by the Administrator. 

Section 13.7. Applicable Law. Except to the extent preempted by applicable federal law or otherwise provided under the terms of
the Plan, the Plan and all rights hereunder shall be governed by and construed in accordance with the laws of the State of Illinois. 

  
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 Section 13.8. Statute of Limitations for Actions under the Plan. Except for actions
to which the statute of limitations prescribed by Section 413 of ERISA applies, (a) no legal or equitable action relating to a claim for benefits under Section 502 of ERISA may be commenced later than one year after the claimant
receives a final decision from the Chief Human Resources Officer (or such other officer designated from time to time by the Chief Human Resources Officer) in response to the claimant’s request for review of the adverse benefit determination and
(b) no other legal or equitable action involving the Plan may be commenced later than two years from the time the person bringing an action knew, or had reason to know, of the circumstances giving rise to the action. This provision shall not be
interpreted to extend any otherwise applicable statute of limitations, nor to bar the Plan or its fiduciaries from recovering overpayments of benefits or other amounts incorrectly paid to any person under the Plan at any time or bringing any legal
or equitable action against any party. 
 Section 13.9. Forum for Legal Actions under the Plan. Any legal action involving the
Plan that is brought by any Participant, any Beneficiary or any other person shall be litigated in the federal courts located in the Northern District of Illinois or the Eastern District of Pennsylvania, whichever is most convenient, and no other
federal or state court. 
 Section 13.10. Legal Fees. Any award of legal fees in connection with an action involving the Plan
shall be calculated pursuant to a method that results in the lowest amount of fees being paid, which amount shall be no more than the amount that is reasonable. In no event shall legal fees be awarded for work related to (a) administrative
proceedings under the Plan, (b) unsuccessful claims brought by a Participant, Beneficiary or any other person, or (c) actions that are not brought under ERISA. In calculating any award of legal fees, there shall be no enhancement for the
risk of contingency, nonpayment or any other risk nor shall there be applied 

  
 -92- 

 
a contingency multiplier or any other multiplier. In any action brought by a Participant, Beneficiary or any other person against the Plan, the Administrator, the Investment Office, the Corporate
Investment Committee, any Plan fiduciary, the Chief Human Resources Officer, any Plan administrator, the Company, its affiliates or their respective officers, directors, employees, or agents (the “Plan Parties”), legal fees of the Plan
Parties in connection with such action shall be paid by the Participant, Beneficiary or other person bringing the action, unless the court specifically finds that there was a reasonable basis for the action. 

ARTICLE 14 
 TOP-HEAVY PLAN
REQUIREMENTS 
 Section 14.1. Top-Heavy Plan Determination. If, as of the determination date (as hereinafter defined) for any
Plan Year, the aggregate present value of (a) the accrued Service Annuities under this Plan and the accrued benefits under all other defined benefit plans in the aggregation group (as defined below) and (b) the aggregate account balances
under all defined contribution plans in such aggregation group, in each case with respect to all participants in such plans who are key employees (as defined in Section 416(i) of the Code) for such Plan Year, exceeds 60% of the aggregate of the
present value of the Service Annuities, accrued benefits and account balances of all participants in such plans as of the determination date, then this Plan shall be a top-heavy plan for such Plan Year, and the requirements of Section 14.2
(relating to minimum benefit for top-heavy years), Section 14.3 (relating to top-heavy vesting requirements) and Section 14.4 (relating to special rules for applying statutory limitations on benefits) shall be applicable for such Plan Year
as of the first day thereof. An employee’s compensation, as defined in Section 1.415(c)-2 of the Regulations, from the Company and its Affiliates for a Plan Year shall be used, where applicable, in determining whether such employee is a
key employee. 

  
 -93- 

 For purposes of the first sentence of the preceding paragraph, for any Plan Year, the Service
Annuity accrued in respect of any Employee shall be the amount calculated as of the determination date, and the present value of such amount shall be based on the actuarial assumptions used in the actuarial valuation as of such determination date.
The calculation of the present value of the Service Annuity accrued in respect of any Employee shall be subject to adjustments required under Section 416 of the Code. 

If this Plan shall be a top-heavy plan for any Plan Year and not be a top-heavy plan for any subsequent Plan Year, the requirements of this
Article shall not be applicable for such subsequent Plan Year except to the extent provided in Section 14.3 (relating to top-heavy vesting requirements). 

For purposes of this Article, (a) the aggregation group shall consist of (i) if a key employee was a Participant in this Plan during
the Plan Year containing the determination date (defined below) or any of the four preceding Plan Years, then this Plan and each other plan of an Employer which is qualified under Section 401(a) of the Code and in which a key employee is a
participant during any of such Plan Years, (ii) this Plan and each other plan which enables this Plan to meet the requirements of Section 401(a)(4) or 410(b) of the Code during the Plan Year containing the determination date (defined
below) or any of the four preceding Plan Years, and (iii) this Plan and each other plan of an Employer which it shall so designate and which together with this Plan shall satisfy the requirements of Sections 401(a)(4) and 410 of the Code;
(b) the determination date for all plans in the aggregation group shall be the last day of the preceding plan year; and (c) the valuation date applicable to a determination date shall be (i) in the case of a defined benefit plan, the
date as of which the most recent actuarial valuation for the plan year including the determination date is prepared, and (ii) in the case of a defined contribution plan, 

  
 -94- 

 
the date as of which account balances are determined which is coincident with or immediately precedes the determination date, except that if any such plan specifies a different determination or
valuation date, such different date shall be used with respect to such plan. For the purpose of determining the Service Annuity, accrued benefit or account balance of a participant, any person who received a distribution from a plan in the
aggregation group during the one-year period ending on the last day of the preceding plan year shall be treated as a participant in such plan, and any such distribution shall be included in such participant’s Service Annuity, accrued benefit or
account balance as the case may be, except that in the case of any distribution made for a reason other than severance from employment, death or disability, this sentence shall be applied by substituting “five-year period” for the
“one-year period” stated herein. 
 Section 14.2. Minimum Benefit for Top-Heavy Years. (a) Subject to paragraph
(b) of this Section 14.2 and the applicable reductions set forth in Article 5 (relating to Service Annuities) and Article 6 (relating to Service Annuity forms), the annual amount of Service Annuity on a single life basis to which an
eligible employee (other than an eligible employee who is a key employee as defined in Section 416(i) of the Code) is entitled at age 65 under Section 5.2 (relating to normal and deferred retirement), Section 5.3 (relating to early
retirement), Section 5.4 (relating to disability retirement at or after age 45), Section 5.5 (relating to disability retirement before age 45) or Section 5.7 (relating to deferred vested termination) shall in no event be less than
(i) the product of (A) 2% of such eligible employee’s average compensation, as described in Section 416(c) of the Code, from the Company and its Affiliates during such eligible employee’s five highest-paid consecutive
calendar years of service beginning after January 1, 1983 and while the Plan is top-heavy, multiplied by (B) the number of such eligible employee’s years of Credited Service (but not in excess of ten) ending after

  
 -95- 

 
December 31, 1983 while the Plan is top-heavy less (ii) the annual actuarial equivalent of the eligible employee’s vested portion of such eligible employee’s account balances
attributable to employer contributions and forfeitures, and earnings and losses thereon (including prior distributions thereof) and accrued benefits to which such eligible employee is entitled on Termination of Employment under all other qualified
plans maintained by the Company or its Affiliates. 
 For purposes of this Article 14 (relating to top-heavy plan requirements),
“eligible employee” shall mean any employee other than an employee who is included in a unit of employees covered by a collective bargaining agreement between employee representatives and an Employer, if there is evidence that retirement
benefits have been the subject of good faith bargaining between such employee representatives and such Employer. 
 (b) The provisions of
paragraph (a) shall not apply with respect to an eligible employee if, for each year in which this Plan is top-heavy, (i) the eligible employee’s Employer also maintains a defined contribution plan which is included in the aggregation
group for such year, and (ii) contributions made on behalf of each eligible employee other than key employees and forfeitures allocated to such eligible employee during such Plan Year are at least 5% of such eligible employee’s
compensation. 
 Section 14.3. Top-Heavy Vesting Requirements. Not-withstanding any provision of this Plan to the contrary, if
an eligible employee’s Termination of Employment occurs during a Plan Year in which this Plan is top-heavy and after the eligible employee has completed at least two years of Vesting Service but before the eligible employee has completed five
years of Vesting Service, or after this Plan has been top-heavy and during the time this Plan was top-heavy such eligible employee has completed three years of Vesting Service, then such eligible 

  
 -96- 

 
employee shall be entitled, subject to Article 6 (relating to Service Annuity forms) and Article 7 (relating to limitation on benefits), to receive, determined in accordance with the
following table, the vested percentage of the eligible employee’s Service Annuity computed pursuant to Section 5.7 (relating to deferred vested termination): 
  

					
	 Years of Vesting Service
	  	Vested Percentage	 
	 2 but less than 3
	  	 	20	% 
	 3 but less than 4
	  	 	40	% 
	 4 but less than 5
	  	 	60	% 
	 5 or more
	  	 	100	% 

 Section 14.4. Special Rules for Applying Statutory Limitations on Benefits. In any Plan Year for
which this Plan is top-heavy, clauses (C)(I) and (D)(I) of the first paragraph of Section 7.1 (relating to maximum annual benefits) shall be applied by substituting “100%” for “125%” appearing therein unless, for such Plan
Year (i) the percentage of Service Annuities accrued by Participants who are key employees does not exceed 90% of the Service Annuities accrued by all Participants, and (ii) the minimum accrued benefit of each Participant under all defined
benefit plans in the aggregation group is at least 3% of such Participant’s average compensation multiplied by each year of such Participant’s Credited Service after 1983, not in excess of 10, while such plans are top-heavy. 

ARTICLE 15 
 AMENDMENT AND
TERMINATION 
 Section 15.1. Amendment. The board of directors of the Company (or a committee thereof) may at any time and from
time to time amend or modify this Plan in any manner deemed by the board of directors of the Company to be necessary or desirable, provided, however, that in the case of any amendment or modification that would not result in an aggregate

  
 -97- 

 
annual cost to the Company of more than $50,000,000, the Plan may be amended or modified by action of the Chief Human Resources Officer (with the consent of the Chief Executive Officer in the
case of a discretionary amendment or modification expected to result in an increase in annual expense or liability account balance exceeding $250,000) or another executive officer holding title of equivalent or greater responsibility and, provided,
further, that no amendment shall be made that affects Employees who are represented by IBEW Local Union 15 that is not consistent with that portion of the Company’s collective bargaining agreements with IBEW Local Union 15 concerning the Plan.
Any such amendment or modification shall become effective on such date as the board of directors of the Company shall determine and may apply to Participants in this Plan at the time thereof as well as to future Participants, provided, however, that
no such amendment or modification which reduces the basis for the computation of Service Annuities shall be retroactive as to service prior to the date of such amendment or modification. 

In addition, the Administrator may amend or modify subdivision (4) of Section 2.1 (relating to the definition of Basic Compensation)
and subdivision (24) of Section 2.1 (relating to the definition of Incentive Pay) by changing such subdivisions as described therein. 

Section 15.2. Establishment of Separate Plan. If an Employer shall withdraw from this Plan under Section 11.2 (relating to
withdrawal from participation), the Investment Office shall determine the portion of the Service Annuity Fund held by the Trustee which is applicable to the Participants and Retirees of such Employer and direct the Trustee to segregate such portion
in a separate trust. Such separate trust shall thereafter be held and administered as a part of the separate plan of such Employer. 

  
 -98- 

 Section 15.3. Termination of the Plan by an Employer. The Company may at any time, by
resolution adopted by its board of directors, terminate this Plan in its entirety. In addition, any Employer may at any time terminate its participation in this Plan by resolution adopted by its board of directors to that effect. If the Internal
Revenue Service shall refuse to issue an initial favorable determination letter that this Plan and the Service Annuity Fund as adopted by the Company meets the requirements of Section 401(a) of the Code and that the Service Annuity Fund is
exempt from tax under Section 501(a) of the Code, any Employer may terminate its participation in this Plan and direct the Trustee to pay and deliver to that Employer the portion of the Service Annuity Fund applicable to its contributions. 

Section 15.4. Distribution upon Termination or Partial Termination. Upon termination or partial termination of this Plan, the
Service Annuities accrued as of the date of termination or partial termination, as the case may be, of all affected Participants shall be fully vested. After providing for any expenses of the termination of this Plan, or, in the event of the partial
termination of this Plan, any expenses of such partial termination which are to be borne by the portion of the Service Annuity Fund applicable to those Employees affected by the partial termination, the remainder of such portion of the Service
Annuity Fund (the “asset value”) shall be allocated pursuant to the priority categories set forth in Section 4044 of ERISA and PBGC Regulations. In the event that after the termination of this Plan there is any asset value remaining
after such allocation, the assets representing such asset value shall be paid over and applied for the benefit of the Employees of the Employers. The portion of the asset value allocated to provide Service Annuities to any person or group of persons
may be applied for the benefit of such person or persons by the distribution of cash, continuance of the Service Annuity Fund, establishment of a new trust fund, purchase of annuities from an insurance company, or otherwise, as determined by the
Company in its sole discretion. Notwithstanding the preceding sentences, if the Plan is terminated, the Service Annuity of each highly compensated employee as defined in Section 414(q) of the Code (and any former highly compensated employee) is
limited to a Service Annuity that is nondiscriminatory under Section 401(a)(4) of the Code. 

  
 -99- 

 Section 15.5. Trust to Be Applied Exclusively for Participants and Their
Beneficiaries. Subject only to the provisions of Section 4.2 (relating to return of contributions), Section 15.3 (relating to termination of the Plan by an Employer), Section 15.4 (relating to distribution upon termination or
partial termination of the Plan) and any other provision of this Plan to the contrary notwithstanding, it shall be impossible for any part of the Service Annuity Fund to be used for or diverted to any purpose not for the exclusive benefit of
Participants and their Beneficiaries either by operation or termination of this Plan, power of amendment or other means. 

  
 -100- 

 IN WITNESS WHEREOF, Exelon Corporation has caused this instrument to be executed by its duly
authorized officer on this              day of December, 2012. 
  

			
	EXELON CORPORATION
		
	 By
	 	 
		 	Chief Human Resources Officer

  
 -101- 

 Exhibit 1 

Items Included as Basic Compensation 

Effective on and after April 1, 1995, the payments to Participants which shall be included in “Basic Compensation” for purposes
of subdivision (4) of Section 2.1 of the Plan shall be as follows: 
  

	 	1.	Regular earnings, 

  

	 	2.	Nuclear license bonuses, and 

  

	 	3.	Meter reader bonuses. 

  

	 	4.	Payroll deductions for any commuter benefit offered to management employees pursuant to Section 132(f)(4) of the Code. 

In addition, to the extent they relate to but are not a part of regular earnings for a given period which otherwise have been used in
calculating Basic Compensation, the following items shall be included in the determination of “Basic Compensation” for purposes of subdivision (4) of Section 2.1 of the Plan: 

 

	 	1.	Payments for disability absences, 

  

	 	2.	Back pay included that is not subject to FICA and any other back pay which is awarded to the Participant and pursuant to which award the Participant is required to have such back pay included as Basic Compensation under
the Plan, 

  

	 	3.	Paid and unpaid absences, 

  

	 	4.	Permissible rest period payments, 

  

	 	5.	Credit for service by union officials on union business, 

  

	 	6.	Payments allowed for military duty and 

  

	 	7.	Credits allowed upon return from a military leave of absence. 

 Exhibit 2 

Plans Included for Incentive Pay 

Payments under the following plans shall be considered in determining a Participant’s Incentive Pay, as defined in subdivision
(24) of Section 2.1 of the Plan: 
  

	 	1.	the Unicom Corporation 1995 Variable Compensation Award for Management Employees Under the Unicom Corporation Long-Term Incentive Plan, 

 

	 	2.	any annual incentive award provided under the Unicom Corporation Long Term Incentive Plan or any other successor or other plan that provides annual incentive awards to Participants; provided, however that awards payable
under any such plans with respect to any period beginning on or after January 1, 2001 to a Participant who is a member of IBEW Local Union 15 shall not be Incentive Pay for Plan purposes, 

 

	 	3.	the Commonwealth Edison Pension Fund Management Incentive Pay Plan (effective January 1, 1993), 

  

	 	4.	the Pension Fund Management Deferred Incentive Pay Plan (effective January 1, 1994), 

  

	 	5.	the Commonwealth Edison Company Bulk Power Marketing Incentive Plan (effective April 1, 1994), 

  

	 	6.	any variable pay plan negotiated by the Company with respect to its union Employees, and 

  

	 	7.	Quarterly Incentive Awards paid to a management Employee pursuant to the Exelon Corporation Quarterly Incentive Award. 

 Supplement 1 

Early Retirement Window for Certain Employees 

This Supplement 1 sets forth the early retirement benefits available to each “Eligible Participant” (as defined below) who is at
least age 50 and has completed at least 5 years of Credited Service (after taking into account the grant of any “Service Equivalent” under Section II below) and who submits a signed election and waiver and release of claims to the Company
no earlier than the date of the Eligible Participant’s “Termination Date” (as defined below), or, if later, 45 days after the Participant receives a summary of the benefits provided hereunder, on forms prescribed by the Company,
electing one of the Options set forth below and waiving all employment-related claims against the Employers. 
  

	I.	Definitions. As used in this Supplement 1, the following words and phrases shall have the following respective meanings when capitalized unless the context clearly indicates otherwise: 

 

	 	A.	Cause. Willful commission of acts or omissions which have, have had, or are likely to have, a material adverse effect on the business, operations, financial condition or reputation of an Employer; or conviction
(including a plea of guilty or nolo contendere) of a felony or any crime of fraud, theft, dishonesty or moral turpitude. 

  

	 	B.	Eligible Participant. A Participant (i) whose employment with the Employers is terminated other than for Cause as a result of either (A) his or her Employer’s restructuring related to the merger or
pending merger of Unicom Corporation and PECO Energy or (B) the Participant’s rejection of an offer of a Significant Transfer, (ii) who is notified that his or her Termination Date shall occur on or before December 31, 2002 and
is eligible for the normal retirement benefits or early retirement benefits set forth in this Supplement 1, (iii) who continues employment with the Employers until the Termination Date set forth in the Participant’s notification of
eligibility (or until such earlier date permitted by the Employers) and who does not accept before such Termination Date (or, if later, the date the Eligible Employee’s waiver of claims becomes effective) another position with any Employer,
Exelon Corporation or any of their respective affiliates and (iv) who maintains an acceptable level of performance during the period ending on his or her Termination Date. 

 

	 	C.	Service Equivalent. An amount equal to 12 months plus, if applicable, one additional week for each year of an Eligible Participant’s Credited Service in excess of 10; provided, however, that only that
portion of the Service Equivalent necessary to satisfy the eligibility requirements for an early retirement Service Annuity (granted under Section 5.3 or under the pension enhancement described in Section III B.2.b.) shall be taken into account
for purposes of determining the amount of an Eligible Participant’s early retirement Service Annuity. 

	 	D.	Significant Transfer. An offer of a position with Exelon Corporation or a transfer (between or within business units) that, in either case, results in one or more of the following; 

 

	 	1.	an increase in the Participant’s one-way commuting distance of more than 50 miles; 

  

	 	2.	a substantial change in the Participant’s major position responsibilities and duties (as determined by the head of the Participant’s business unit); 

 

	 	3.	a salary band for the Participant that is lower than the salary band for the Participant’s previous position; or 

  

	 	4.	a reduction in the Participant’s annual base salary or hourly compensation rate, as applicable. 

  

	 	E.	Termination Date. The date on which an Eligible Participant’s Termination of Employment occurs. 

  

	 	F.	Week of Base Salary. In the case of an Eligible Participant who is a full-time Employee, a “Week of Base Salary” shall be determined by dividing (i) the Participant’s annual base salary in
effect on the his or her Termination Date, excluding any additives, premiums or other adjustments, by (ii) 52. In the case of an Eligible Participant who is a part-time Employee, a “Week of Base Salary” shall equal the product of
(i) his or hourly compensation rate in effect on his or her Termination Date multiplied by (ii) the number of hours each week that such Participant is regularly scheduled to work with an Employer. 

 

	II.	Grant of Service Equivalent. An Eligible Participant shall be granted a Service Equivalent only if, after addition of the Service Equivalent, the Participant would become eligible for an early retirement Service
Annuity under Section 5.3 or would be deemed to be age 50 with at least 5 years of Credited Service. The Service Equivalent shall not be granted to a Participant if such Participant, as of his or her Termination Date, is eligible, without the
addition of the Service Equivalent, for an early retirement Service Annuity under Section 5.3 or, as of his or her Termination Date, he or she has attained age 50 and has at least 5 years of Credited Service, unless in the latter case, the
grant of the Service Equivalent would qualify the Eligible Participant for an early retirement Service Annuity under Section 5.3 pursuant to Section IIIb hereof. 

 

	III.	Benefits. 

  

	 	A.	 Eligible Participants who are Age 50 with at Least 10 Years of Credited Service. Notwithstanding anything contained in the Plan to the
contrary, if an Eligible Participant, after taking into account the Service Equivalent granted to such Eligible Participant under Section II hereof, is at least age 50 on his or her Termination Date and has at least 10 years of Credit Service as of
such date or would be deemed to be age 50 with at least 10 years of Credited Service as of such date, such Eligible Participant shall be entitled to an early retirement Service Annuity under Section 5.3. Payment of the Eligible
Participant’s early retirement Service 

	 	
Annuity under Section 5.3 shall commence at the time elected by the Eligible Participant, provided that the Eligible Participant has had a Termination of Employment and has attained at least
age 50 (determined, for this purpose, by disregarding any Service Equivalent granted to the Eligible Participant). Payment shall be made in any form provided under the Plan. 

 

	 	B.	Eligible Participants who are Age 50 with at Least 5, but Less than 10, Years of Credited Service. Notwithstanding anything contained in the Plan to the contrary, if an Eligible Participant, after taking into
account the Service Equivalent granted to such Eligible Participant under Section II hereof, is at least age 50 on his or her Termination Date and has completed at least 5 but less than 10 years of Credited Service as of such date or would be deemed
to be age 50 with at least 5 but less than 10 years of Credited Service as of such date, such Eligible Participant shall be entitled to elect one of the following normal or early retirement benefit under the Plan: 

 

	 	1.	Option 1—Unreduced Additional Benefit. An additional benefit equal to 52 weeks of Base Salary. An Eligible Participant may elect to receive the additional benefit in the form of a lump sum distribution
(which shall be paid in the same manner and subject to the terms provided under Section 6.7) or in any other form provide under the Plan. An Eligible Participant who elects this Option 1 shall not be eligible for an early retirement Service
Annuity under Section 5.3. 

  

	 	2.	Option 2 – Reduced Additional Benefit and Pension Enhancement. An Eligible Participant who elects Option 2 shall be entitled to the following two benefits: 

 

	 	a.	Reduced Additional Benefit. An additional benefit equal to 26 Weeks of Base Salary. An Eligible Participant may elect to receive the additional benefit in the form of a lump sum distribution (which shall be paid
in the same manner and subject to the terms provided under Section 6.7) or in any other form provided under the Plan. 

  

	 	b.	 Pension Enhancement. In lieu of a deferred Service Annuity under Section 5.7, a normal retirement Service Annuity under Section 5.2
or an early retirement Service Annuity under Section 5.3, using the Eligible Participant’s age and years of Credited Service (including any Service Equivalent granted to the Eligible Participant under Section II hereof) as of his or her
Termination Date (or, if later, the date that the Eligible Participant begins receiving his or her normal retirement Service Annuity under Section 5.2 or early retirement Service Annuity under Section 5.3). Payment of the Eligible
Participant’s normal retirement or early retirement Service Annuity shall commence at the time elected by the Eligible Participant, 

	 	
provided that the Eligible Participant has had a Termination of Employment and has attained at least age 50 or age 65, as applicable (determined, for this purpose, by disregarding an Service
Equivalent granted to the Eligible Participant). Payment shall be made in any form provided under the Plan. 

  

	 	C.	Eligible Participants who are not Age 50 or who do not have at Least 5 Years of Credited Service. An Eligible Participant who, (after the addition of any Service Equivalent) as of his or her Termination Date, is
not age 50 or does not have at least 5 years of Credited Service shall not be entitled to any benefits under this Supplement 1. 

  

	 	D.	Adjustments to Comply with Nondiscrimination Rules. If payment of the benefits described in this Supplement 1 to any Eligible Participant who is a “highly compensated employee,” as defined in section
414(q) of the Code would cause the Plan to fail any nondiscrimination requirements of section 401(a) of the Code, the benefits otherwise payable under this Supplement 1 shall be restricted in any manner determined by the Administrator so as to
permit the Plan to satisfy such nondiscrimination requirements. 

 Exhibit A 

Table B 
 Early
Retirement Service Factors 
 Applicable Monthly Payments to Age 65 

The following factors shall be applied (a) to determine the reductions applicable to the early retirement Service Annuity of any Participant who is
not a member of IBEW Local Union 15, and whose Termination of Employment occurs on or after April 1, 1995, and (b) to determine the reductions applicable to the early retirement Service Annuity of any Participant who is a member of IBEW
Local Union 15 and whose Termination of Employment occurred after April 1, 1995 and before October 1, 1999: 
  

																																																	
	AGE	 	0	 	 	1	 	 	2	 	 	3	 	 	4	 	 	5	 	 	6	 	 	7	 	 	8	 	 	9	 	 	10	 	 	11	 
	50	 	 	.7200	  	 	 	.7225	  	 	 	.7250	  	 	 	.7275	  	 	 	.7300	  	 	 	.7325	  	 	 	.7350	  	 	 	.7375	  	 	 	.7400	  	 	 	.7425	  	 	 	.7450	  	 	 	.7475	  
	51	 	 	.7500	  	 	 	.7525	  	 	 	.7550	  	 	 	.7575	  	 	 	.7600	  	 	 	.7625	  	 	 	.7650	  	 	 	.7675	  	 	 	.7700	  	 	 	.7725	  	 	 	.7750	  	 	 	.7775	  
	52	 	 	.7800	  	 	 	.7825	  	 	 	.7850	  	 	 	.7875	  	 	 	.7900	  	 	 	.7925	  	 	 	.7950	  	 	 	.7975	  	 	 	.8000	  	 	 	.8025	  	 	 	.8050	  	 	 	.8075	  
	53	 	 	.8100	  	 	 	.8125	  	 	 	.8150	  	 	 	.8175	  	 	 	.8200	  	 	 	.8225	  	 	 	.8250	  	 	 	.8275	  	 	 	.8300	  	 	 	.8325	  	 	 	.8350	  	 	 	.8375	  
	54	 	 	.8400	  	 	 	.8425	  	 	 	.8450	  	 	 	.8475	  	 	 	.8500	  	 	 	.8525	  	 	 	.8550	  	 	 	.8575	  	 	 	.8600	  	 	 	.8625	  	 	 	.8650	  	 	 	.8675	  
	55	 	 	.8700	  	 	 	.8725	  	 	 	.8750	  	 	 	.8775	  	 	 	.8800	  	 	 	.8825	  	 	 	.8850	  	 	 	.8875	  	 	 	.8900	  	 	 	.8925	  	 	 	.8950	  	 	 	.8975	  
	56	 	 	.9000	  	 	 	.9025	  	 	 	.9050	  	 	 	.9075	  	 	 	.9100	  	 	 	.9125	  	 	 	.9150	  	 	 	.9175	  	 	 	.9200	  	 	 	.9225	  	 	 	.9250	  	 	 	.9275	  
	57	 	 	.9300	  	 	 	.9325	  	 	 	.9350	  	 	 	.9375	  	 	 	.9400	  	 	 	.9425	  	 	 	.9450	  	 	 	.9475	  	 	 	.9500	  	 	 	.9525	  	 	 	.9550	  	 	 	.9575	  
	58	 	 	.9600	  	 	 	.9617	  	 	 	.9633	  	 	 	.9650	  	 	 	.9667	  	 	 	.9683	  	 	 	.9700	  	 	 	.9717	  	 	 	.9733	  	 	 	.9750	  	 	 	.9767	  	 	 	.9783	  
	59	 	 	.9800	  	 	 	.9817	  	 	 	.9833	  	 	 	.9850	  	 	 	.9867	  	 	 	.9883	  	 	 	.9900	  	 	 	.9917	  	 	 	.9933	  	 	 	.9950	  	 	 	.9967	  	 	 	.9983	  
	60	 	 	1.0000	  	 				 				 				 				 				 				 				 				 				 				 			

 Exhibit B 

Table B1 
 Early
Retirement Service Factors 
 Applicable Monthly Payments to Age 65 

The following factors shall be applied to determine the reductions applicable to the early retirement Service Annuity of any Participant who is a member of
IBEW Local Union 15 whose Termination of Employment occurs on or after October 1, 1999: 
  

																																																	
	AGE	 	0	 	 	1	 	 	2	 	 	3	 	 	4	 	 	5	 	 	6	 	 	7	 	 	8	 	 	9	 	 	10	 	 	11	 
	50	 	 	.7900	  	 	 	.7925	  	 	 	.7950	  	 	 	.7975	  	 	 	.8000	  	 	 	.8025	  	 	 	.8050	  	 	 	.8075	  	 	 	.8100	  	 	 	.8125	  	 	 	.8150	  	 	 	.8175	  
	51	 	 	.8200	  	 	 	.8225	  	 	 	.8250	  	 	 	.8275	  	 	 	.8300	  	 	 	.8325	  	 	 	.8350	  	 	 	.8375	  	 	 	.8400	  	 	 	.8425	  	 	 	.8450	  	 	 	.8475	  
	52	 	 	.8500	  	 	 	.8525	  	 	 	.8550	  	 	 	.8575	  	 	 	.8600	  	 	 	.8625	  	 	 	.8650	  	 	 	.8675	  	 	 	.8700	  	 	 	.8725	  	 	 	.8750	  	 	 	.8775	  
	53	 	 	.8800	  	 	 	.8825	  	 	 	.8850	  	 	 	.8875	  	 	 	.8900	  	 	 	.8925	  	 	 	.8950	  	 	 	.8975	  	 	 	.9000	  	 	 	.9025	  	 	 	.9050	  	 	 	.9075	  
	54	 	 	.9100	  	 	 	.9125	  	 	 	.9150	  	 	 	.9175	  	 	 	.9200	  	 	 	.9225	  	 	 	.9250	  	 	 	.9275	  	 	 	.9300	  	 	 	.9325	  	 	 	.9350	  	 	 	.9375	  
	55	 	 	.9400	  	 	 	.9425	  	 	 	.9450	  	 	 	.9475	  	 	 	.9500	  	 	 	.9525	  	 	 	.9550	  	 	 	.9575	  	 	 	.9600	  	 	 	.9625	  	 	 	.9650	  	 	 	.9675	  
	56	 	 	.9700	  	 	 	.9725	  	 	 	.9750	  	 	 	.9775	  	 	 	.9800	  	 	 	.9825	  	 	 	.9850	  	 	 	.9875	  	 	 	.9900	  	 	 	.9925	  	 	 	.9950	  	 	 	.9975	  
	57	 	 	1.0000	  	 				 				 				 				 				 				 				 				 				 				 			

 Exhibit C 

Table B2 
 Early
Retirement Supplemental Factors 
 Applicable Monthly Payments to Age 65 

The following factors shall be applied (a) to determine supplemental monthly payments to age 65 for any Participant who is not a member of IBEW Local
Union 15 and whose Termination of Employment occurs on or after April 1, 1995, and (b) to determine the supplemental monthly payments to age 65 for any participant who is a member of IBEW Local Union 15 whose Termination of Employment
occurred after April 1, 1995 and before October 1, 1999: 
  

																																																	
	AGE	 	0	 	 	1	 	 	2	 	 	3	 	 	4	 	 	5	 	 	6	 	 	7	 	 	8	 	 	9	 	 	10	 	 	11	 
	50	 	 	.4200	  	 	 	.4175	  	 	 	.4150	  	 	 	.4125	  	 	 	.4100	  	 	 	.4075	  	 	 	.4050	  	 	 	.4025	  	 	 	.4000	  	 	 	.3975	  	 	 	.3950	  	 	 	.3925	  
	51	 	 	.3900	  	 	 	.3875	  	 	 	.3850	  	 	 	.3825	  	 	 	.3800	  	 	 	.3775	  	 	 	.3750	  	 	 	.3725	  	 	 	.3700	  	 	 	.3675	  	 	 	.3650	  	 	 	.3625	  
	52	 	 	.3600	  	 	 	.3575	  	 	 	.3550	  	 	 	.3525	  	 	 	.3500	  	 	 	.3475	  	 	 	.3450	  	 	 	.3425	  	 	 	.3400	  	 	 	.3375	  	 	 	.3350	  	 	 	.3325	  
	53	 	 	.3300	  	 	 	.3275	  	 	 	.3260	  	 	 	.3225	  	 	 	.3200	  	 	 	.3175	  	 	 	.3150	  	 	 	.3125	  	 	 	.3100	  	 	 	.3075	  	 	 	.3050	  	 	 	.3025	  
	54	 	 	.3000	  	 	 	.2975	  	 	 	.2950	  	 	 	.2925	  	 	 	.2900	  	 	 	.2875	  	 	 	.2850	  	 	 	.2825	  	 	 	.2800	  	 	 	.2775	  	 	 	.2760	  	 	 	.2725	  
	55	 	 	.2700	  	 	 	.2675	  	 	 	.2650	  	 	 	.2625	  	 	 	.2600	  	 	 	.2575	  	 	 	.2550	  	 	 	.2525	  	 	 	.2500	  	 	 	.2475	  	 	 	.2450	  	 	 	.2425	  
	56	 	 	.2400	  	 	 	.2375	  	 	 	.2350	  	 	 	.2325	  	 	 	.2300	  	 	 	.2275	  	 	 	.2250	  	 	 	.2225	  	 	 	.2200	  	 	 	.2175	  	 	 	.2150	  	 	 	.2125	  
	57	 	 	.2100	  	 	 	.2075	  	 	 	.2050	  	 	 	.2025	  	 	 	.2000	  	 	 	.1975	  	 	 	.1950	  	 	 	.1925	  	 	 	.1900	  	 	 	.1875	  	 	 	.1850	  	 	 	.1825	  
	58	 	 	.1800	  	 	 	.1775	  	 	 	.1750	  	 	 	.1725	  	 	 	.1700	  	 	 	.1675	  	 	 	.1650	  	 	 	.1625	  	 	 	.1600	  	 	 	.1575	  	 	 	.1550	  	 	 	.1525	  
	59	 	 	.1500	  	 	 	.1479	  	 	 	.1458	  	 	 	.1438	  	 	 	.1417	  	 	 	.1396	  	 	 	.1375	  	 	 	.1354	  	 	 	.1333	  	 	 	.1313	  	 	 	.1292	  	 	 	.1271	  
	60	 	 	.1250	  	 	 	.1229	  	 	 	.1208	  	 	 	.1188	  	 	 	.1167	  	 	 	.1146	  	 	 	.1125	  	 	 	.1104	  	 	 	.1083	  	 	 	.1063	  	 	 	.1042	  	 	 	.1021	  
	61	 	 	.1000	  	 	 	.0979	  	 	 	.0958	  	 	 	.0938	  	 	 	.0917	  	 	 	.0896	  	 	 	.0875	  	 	 	.0854	  	 	 	.0833	  	 	 	.0813	  	 	 	.0792	  	 	 	.0771	  
	62	 	 	.0750	  	 	 	.0729	  	 	 	.0708	  	 	 	.0688	  	 	 	.0667	  	 	 	.0646	  	 	 	.0625	  	 	 	.0604	  	 	 	.0583	  	 	 	.0563	  	 	 	.0542	  	 	 	.0521	  
	63	 	 	.0500	  	 	 	.0479	  	 	 	.0458	  	 	 	.0438	  	 	 	.0417	  	 	 	.0396	  	 	 	.0375	  	 	 	.0354	  	 	 	.0333	  	 	 	.0313	  	 	 	.0292	  	 	 	.0271	  
	64	 	 	.0250	  	 	 	.0229	  	 	 	.0208	  	 	 	.0188	  	 	 	.0167	  	 	 	.0146	  	 	 	.0125	  	 	 	.0104	  	 	 	.0083	  	 	 	.0063	  	 	 	.0042	  	 	 	.0021	  

 Exhibit D 

Table B3 
 Early
Retirement Supplemental Factors 
 Applicable Monthly Payments to Age 65 

The following factors shall be applied to determine the supplemental monthly payments to age 65 for any Participant who is a member of IBEW Local Union 15
whose Termination of Employment occurs on or after October 1, 1999: 
  

																																																	
	AGE	 	0	 	 	1	 	 	2	 	 	3	 	 	4	 	 	5	 	 	6	 	 	7	 	 	8	 	 	9	 	 	10	 	 	11	 
	50	 	 	.4100	  	 	 	.4075	  	 	 	.4050	  	 	 	.4025	  	 	 	.4000	  	 	 	.3975	  	 	 	.3950	  	 	 	.3925	  	 	 	.3900	  	 	 	.3875	  	 	 	.3850	  	 	 	.3825	  
	51	 	 	.3800	  	 	 	.3775	  	 	 	.3750	  	 	 	.3725	  	 	 	.3700	  	 	 	.3675	  	 	 	.3650	  	 	 	.3625	  	 	 	.3600	  	 	 	.3575	  	 	 	.3550	  	 	 	.3525	  
	52	 	 	.3500	  	 	 	.3475	  	 	 	.3450	  	 	 	.3425	  	 	 	.3400	  	 	 	.3375	  	 	 	.3350	  	 	 	.3325	  	 	 	.3300	  	 	 	.3275	  	 	 	.3250	  	 	 	.3225	  
	53	 	 	.3200	  	 	 	.3175	  	 	 	.3150	  	 	 	.3125	  	 	 	.3100	  	 	 	.3075	  	 	 	.3050	  	 	 	.3025	  	 	 	.3000	  	 	 	.2975	  	 	 	.2950	  	 	 	.2925	  
	54	 	 	.2900	  	 	 	.2875	  	 	 	.2850	  	 	 	.2825	  	 	 	.2800	  	 	 	.2775	  	 	 	.2750	  	 	 	.2725	  	 	 	.2700	  	 	 	.2675	  	 	 	.2650	  	 	 	.2625	  
	55	 	 	.2600	  	 	 	.2575	  	 	 	.2550	  	 	 	.2525	  	 	 	.2500	  	 	 	.2475	  	 	 	.2450	  	 	 	.2425	  	 	 	.2400	  	 	 	.2375	  	 	 	.2350	  	 	 	.2325	  
	56	 	 	.2300	  	 	 	.2275	  	 	 	.2250	  	 	 	.2225	  	 	 	.2200	  	 	 	.2175	  	 	 	.2150	  	 	 	.2125	  	 	 	.2100	  	 	 	.2075	  	 	 	.2050	  	 	 	.2025	  
	57	 	 	.2000	  	 	 	.1979	  	 	 	.1958	  	 	 	.1938	  	 	 	.1917	  	 	 	.1896	  	 	 	.1875	  	 	 	.1854	  	 	 	.1833	  	 	 	.1803	  	 	 	.1782	  	 	 	.1761	  
	58	 	 	.1750	  	 	 	.1729	  	 	 	.1708	  	 	 	.1688	  	 	 	.1667	  	 	 	.1646	  	 	 	.1625	  	 	 	.1604	  	 	 	.1583	  	 	 	.1563	  	 	 	.1542	  	 	 	.1521	  
	59	 	 	.1500	  	 	 	.1479	  	 	 	.1458	  	 	 	.1438	  	 	 	.1417	  	 	 	.1396	  	 	 	.1375	  	 	 	.1354	  	 	 	.1333	  	 	 	.1313	  	 	 	.1292	  	 	 	.1271	  
	60	 	 	.1250	  	 	 	.1229	  	 	 	.1208	  	 	 	.1188	  	 	 	.1167	  	 	 	.1146	  	 	 	.1125	  	 	 	.1104	  	 	 	.1083	  	 	 	.1063	  	 	 	.1042	  	 	 	.1021	  
	61	 	 	.1000	  	 	 	.0979	  	 	 	.0958	  	 	 	.0938	  	 	 	.0917	  	 	 	.0896	  	 	 	.0875	  	 	 	.0854	  	 	 	.0833	  	 	 	.0813	  	 	 	.0792	  	 	 	.0771	  
	62	 	 	.0750	  	 	 	.0729	  	 	 	.0708	  	 	 	.0688	  	 	 	.0667	  	 	 	.0646	  	 	 	.0625	  	 	 	.0604	  	 	 	.0583	  	 	 	.0563	  	 	 	.0542	  	 	 	.0521	  
	63	 	 	.0500	  	 	 	.0479	  	 	 	.0458	  	 	 	.0438	  	 	 	.0417	  	 	 	.0396	  	 	 	.0375	  	 	 	.0354	  	 	 	.0333	  	 	 	.0313	  	 	 	.0292	  	 	 	.0271	  
	64	 	 	.0250	  	 	 	.0229	  	 	 	.0208	  	 	 	.0188	  	 	 	.0167	  	 	 	.0146	  	 	 	.0125	  	 	 	.0104	  	 	 	.0083	  	 	 	.0063	  	 	 	.0042	  	 	 	.0021	  

 APPENDIX B 

SERVICE ANNUITY PLAN 
 OF

 PECO ENERGY COMPANY 

Under the Exelon Corporation Retirement Program 

Amended and Restated Effective January 1, 2013 

 TABLE OF CONTENTS 

 

					
	 	  	Page	 
		
	 ARTICLE I DEFINITIONS
	  	 	1	  
		
	 ARTICLE II PARTICIPATION
	  	 	11	  
		
	 ARTICLE III ACCRUAL OF BENEFITS
	  	 	16	  
		
	 3.1        Accrued Benefit
	  	 	16	  
	 3.2        Minimum Accrued Benefit
	  	 	17	  
	 3.3        Application of Section 401(a)(17) Compensation Limit
	  	 	18	  
	 3.4        Transferred Employees
	  	 	19	  
	 3.5        Rehired Employees
	  	 	19	  
		
	 ARTICLE IV. BENEFITS
	  	 	19	  
		
	 4.1        Normal Retirement
	  	 	19	  
	 4.2        Postponed Retirement
	  	 	19	  
	 4.3        Early Retirement
	  	 	20	  
	 4.4        Deferred Annuity
	  	 	21	  
	 4.5        Disabled Eligible Employees
	  	 	22	  
	 4.6        Maximum Annuity
	  	 	22	  
	 4.7        Benefit Commencement Date
	  	 	24	  
	 4.8        Post-Retirement Adjustment
	  	 	24	  
	 4.9        Special Early Retirement Benefit
	  	 	25	  
	 4.10      Minimum Annuity
	  	 	26	  
	 4.11      Suspension of Benefits
	  	 	26	  
	 4.12      Benefit Restrictions as a Result of Funding
	  	 	27	  
	 4.13      Participant’s Death During Qualified Military Service
	  	 	29	  
		
	 ARTICLE IVA. SPECIAL LIMITED DURATION EARLY RETIREMENT BENEFIT
	  	 	29	  
		
	 4A.1     Eligibility
	  	 	29	  
	 4A.2     Special Early Retirement Election
	  	 	30	  
	 4A.3     Benefits
	  	 	30	  
	 4A.4     Special Rules
	  	 	32	  
		
	 ARTICLE IVB. NUCLEAR VOLUNTARY RETIREMENT INCENTIVE PLAN
	  	 	33	  
		
	 4B.1     Eligibility
	  	 	33	  
	 4B.2     Voluntary Early Retirement Election
	  	 	33	  
	 4B.3     Benefits
	  	 	33	  
	 4B.4     Special Rules
	  	 	35	  

  
 -i- 

 TABLE OF CONTENTS 

(continued) 
  

					
	 	  	Page	 
		
	 ARTICLE IVC. VOLUNTARY RETIREMENT INCENTIVE PROGRAM
	  	 	35	  
		
	 4C.1     Eligibility
	  	 	35	  
	 4C.2     Voluntary Early Retirement Election
	  	 	36	  
	 4C.3     Benefits
	  	 	38	  
	 4C.4     Special Rules
	  	 	39	  
		
	 ARTICLE IVD. 1998 WORKFORCE REDUCTION PROGRAM
	  	 	39	  
		
	 4D.1     Purpose
	  	 	39	  
	 4D.2     Definitions
	  	 	39	  
	 4D.3     Elections of the Retirement and Separation Benefits
	  	 	43	  
	 4D.4     Computation of Retirement Benefits Under the Program
	  	 	43	  
	 4D.5     Computation, Payment and Form of Separation Benefits Under the Program
	  	 	43	  
		
	 ARTICLE IVE. MERGER SEPARATION PROGRAM
	  	 	45	  
		
	 4E.1     Purpose
	  	 	45	  
	 4E.2     Definitions
	  	 	45	  
	 4E.3     Elections of the Retirement and Separation Benefits
	  	 	49	  
	 4E.4     Computation of Retirement Benefits Under the Program
	  	 	49	  
	 4E.5     Computation of Separation Benefits Under the Program
	  	 	50	  
	 4E.6     Payment and Form of Annuities Under the Program
	  	 	50	  
		
	 ARTICLE V. FORM OF PENSIONS
	  	 	52	  
		
	 5.1        Unmarried Participants
	  	 	52	  
	 5.2        Married Participants
	  	 	52	  
	 5.3        Contingent Annuity Option
	  	 	52	  
	 5.4        Death Benefits for Other Vested Participants
	  	 	55	  
	 5.5        Notice to Participants
	  	 	57	  
	 5.6        Cash-Outs
	  	 	59	  
	 5.7        Spousal Consent.
	  	 	59	  
	 5.8        Minimum Distribution Requirements
	  	 	60	  

  
 -ii- 

 TABLE OF CONTENTS 

(continued) 
  

					
	 	  	Page	 
		
	 5.9        Application for Benefits
	  	 	60	  
	 5.10      Direct Rollovers
	  	 	60	  
	 5.11      Special Lump Sum Payment Option
	  	 	61	  
		
	 ARTICLE VI. BREAKS IN SERVICE
	  	 	64	  
		
	 ARTICLE VII. CONTRIBUTIONS
	  	 	65	  
		
	 7.1        Contributions by the Company
	  	 	65	  
	 7.2        Source of Benefits
	  	 	66	  
		
	 ARTICLE VIII. ADMINISTRATION
	  	 	66	  
		
	 8.1        The Administrator
	  	 	66	  
	 8.2        The Investment Office
	  	 	67	  
	 8.3        The Corporate Investment Committee
	  	 	67	  
	 8.4        Status of Administrator, the Investment Office and the Corporate Investment
Committee
	  	 	68	  
	 8.5        Notice to Trustee of Members
	  	 	68	  
	 8.6        Allocation of Responsibilities
	  	 	68	  
	 8.7        General Governance
	  	 	68	  
	 8.8        Indemnification
	  	 	69	  
	 8.9        No Compensation
	  	 	69	  
	 8.10      Employ of Counsel and Agents
	  	 	69	  
	 8.11      Claims Procedures
	  	 	69	  
	 8.12      Actuary to Be Employed
	  	 	70	  
	 8.13      Funding Policy
	  	 	70	  
	 8.14      Notices to Participants, Etc.
	  	 	70	  
	 8.15      Notices to Employers or Administrator
	  	 	70	  
	 8.16      Records
	  	 	71	  
	 8.17      Responsibility to Advise Administrator of Current Address
	  	 	71	  
	 8.18      Electronic Media
	  	 	71	  
	 8.19      Correction of Error
	  	 	71	  
	 8.20      Applicable Law
	  	 	71	  
	 8.21      Statute of Limitations for Actions under the Plan
	  	 	71	  
	 8.22      Forum for Legal Actions under the Plan
	  	 	72	  
	 8.23      Legal Fees
	  	 	72	  

  
 -iii- 

 TABLE OF CONTENTS 

(continued) 
  

					
	 	  	Page	 
		
	 ARTICLE IX. AMENDMENT AND TERMINATION
	  	 	72	  
		
	 9.1        Amendment
	  	 	72	  
	 9.2        Termination
	  	 	73	  
	 9.3        Limitation on Benefits
	  	 	73	  
		
	 ARTICLE X. MISCELLANEOUS
	  	 	74	  
		
	 10.1      Forfeitures
	  	 	74	  
	 10.2      Mergers, Etc.
	  	 	74	  
	 10.3      Nonalienation of Benefits
	  	 	74	  
	 10.4      Effect on Employment
	  	 	74	  
	 10.5      Facility of Payment
	  	 	74	  
	 10.6      Lost Payees
	  	 	74	  
	 10.7      Effective Date
	  	 	75	  
	 10.8      Expenses
	  	 	75	  
		
	 ARTICLE XI. TOP-HEAVY PROVISIONS
	  	 	75	  
		
	 11.1      Definitions
	  	 	75	  
	 11.2      Top-Heavy Operating Rules
	  	 	77	  
		
	 ARTICLE XII. POST RETIREMENT HEALTH BENEFITS
	  	 	78	  
		
	 12.1      Eligibility
	  	 	78	  
	 12.2      Benefits Provided
	  	 	78	  
	 12.3      Establishment of Accounts
	  	 	79	  
	 12.4      Funding
	  	 	79	  

  
 -iv- 

 SERVICE ANNUITY PLAN 

OF 
 PECO ENERGY COMPANY 

As Amended and Restated Effective January 1, 2013 

The name of the plan set forth herein shall be the “Service Annuity Plan of PECO Energy Company” (the “Plan”). This Plan is an amendment
and restatement of the Service Annuity Plan of PECO Energy Company as in effect on December 31, 2012 and, except as otherwise provided, shall apply to Employees whose employment is terminated on or after January 1, 2013 and to the
beneficiaries of such Employees. The rights and benefits of Employees whose employment terminates before January 1, 2013 and of the beneficiaries of such Employees shall be determined under the Service Annuity Plan of PECO Energy Company as in
effect at the time of such Employees’ termination, including any provisions of this Plan effective at such time; provided, however, that certain provisions of Articles 4 and 9 (relating to limitations on benefits), certain provisions of Article
2 (relating to special participation and distribution rules relating to recommencement of employment and employment by related entities), Article 8 (relating to administration), Article 9 (relating to amendment and termination of the Plan) and
Article 10 (relating to miscellaneous provisions) shall be effective for all such persons. 
 ARTICLE I Definitions. 

Whenever used in this Plan: 
 1.1
“Accrued Benefit” means the amount of pension payable in the form of a Single Life Annuity commencing on a Participant’s Normal Retirement Date (or, immediately, if the Participant has passed his Normal Retirement Date) accrued by a
Participant under Article III as of the date of reference. Accrued Benefits shall only be payable in accordance with Articles IV and V. 

1.2 “Active Participant” means a Participant who is an Eligible Employee. 

1.3 “Actuarial Equivalent” means a benefit of equal actuarial value under the assumptions set forth in Appendix A. 

1.4 “Administrator” means the Company acting through its Vice President, Health & Benefits or such other person appointed
pursuant to Section 8.1. 
 1.5 “Affiliate” means, as of any time of reference: (a) any corporation included with the
Company in a controlled group of corporations within the meaning of Section 414(b) of the Code, (b) any trade or business (whether or not incorporated) which is under common control with the Company within the meaning of
Section 414(c) of the Code, (c) any member of any affiliated service group of which the Company is a member within the meaning of Section 414(m) of the Code, and (d) any other entity required to be aggregated with the Company
pursuant to regulations under Section 414(o) of the Code; provided, however, that for purposes of Section 4.6, when applying Sections 414(b) and (c) of the Code, the phrase “more than 50%” shall be substituted for the phrase
“at least 80%” each place it appears in Section 1563(a)(1) of the Code. 

 1.6 “Age” means age on last birthday, except that an individual attains age 70-1/2 on
the corresponding date in the sixth calendar month following the month in which his seventieth birthday occurs (or the last day of such sixth month if there is no such corresponding date therein). Notwithstanding the preceding sentence, solely for
purposes of determining whether a Participant is eligible to elect the Contingent Annuity Option under Section 5.3, “Age” means the Participant’s age on his nearest birthday, rounding his actual age up or down as appropriate.

 1.7 “Benefit Accrual Computation Period” means the portion of a calendar year that begins on the latest of
(a) January 1, (b) the date on which an Employee becomes an Eligible Employee or (c) the date an Active Participant resumes work after receiving benefits under the Company’s Disabilitant Plan (or June 1, 1992, for an
Active Participant who is receiving benefits under the Company’s Disabilitant Plan on June 1, 1992) and ends on the earliest of (1) December 31, (2) the date an Employee ceases to be an Eligible Employee, (3) the date
an Active Participant commences receiving benefits under the Company’s Disabilitant Plan (except with respect to Participants described in the proviso to the penultimate sentence of Section 1.9(b)), (4) an Employee’s Normal
Retirement Date (in the case of an Employee who does not complete an Hour of Service on or after January 1, 1988), or (5) the date of an Employee’s death. 

1.8 “Benefit Commencement Date” means, for any Participant, the date as of which his first periodic benefit payment or single sum
payment is due. “Benefit Commencement Date” also means, with respect to a surviving Spouse or other beneficiary, the date on which the survivor’s benefit under Section 5.3 or 5.4 commences to the surviving Spouse or other
beneficiary. 
 1.9 “Benefit Year” means a credit awarded as follows, subject to Article VI: 

(a) Each Employee as of December 31, 1975 shall be credited with a number of Benefit Years equal to his years of service
under the Plan as of that date; 
 (b) Each Active Participant shall be credited with one Benefit Year for each 12 month
Benefit Accrual Computation Period after December 31, 1975 during which he completes 1,000 or more Hours of Service and 1/12th of a Benefit Year for each month or part of a month of a Benefit Accrual Computation Period of less than 12 months
during which his Hours of Service equal or exceed 83 1/3 times the number of full months in the period. Benefit Years are not credited with respect to any period during which an Active Participant is receiving benefits under the Company’s
Disabilitant Plan; provided, however, that Benefit Years shall be credited to an Active Participant who is receiving benefits under the Company’s Disabilitant Plan on June 1, 1992, with respect to any period after May 31, 1992 for
which such benefits are received. Effective January 1, 2002, Benefit Years are credited with respect to any period following an Active Participant’s Separation from Service or absence on account of a disability for illness or accident
during which the Participant is eligible for and receiving benefits under any long-term disability benefit plan sponsored by the Company. 

  
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 (c) A Power Team Employee shall not receive credit for any Benefit Year that
accrues while he is a Power Team Employee. Notwithstanding the foregoing, for the purposes of Section 5.3 only, a Power Team Employee shall be deemed to receive credit for Benefit Years to the extent such Power Team Employee otherwise would
have earned such credit but for the provisions of this Section 1.9(c). 
 (d) An EIS Senior Management Employee shall
not receive credit for any Benefit Year, or portion of a Benefit Year, that accrues after October 31, 1999, or the date on which such Participant becomes an EIS Senior Management Employee, if later, and the Benefit Accrual Computation Period
for such Participant that would otherwise include such date shall end on such date. Notwithstanding the foregoing, for the purposes of Section 5.3 only, an EIS Senior Management Employee shall be deemed to receive credit for Benefit Years to
the extent such EIS Senior Management Employee otherwise would have earned such credit but for the provisions of this Section 1.9(d). 

(e) Notwithstanding the foregoing, for purposes of calculating a Participant’s Benefit Years, each period of Qualified
Military Service served by a Participant is, upon reemployment by the Company or an Affiliate within the time during which the Participant’s right to reemployment is protected by applicable law, deemed to constitute service with the Company for
such purposes. 
 1.10 “CEG” means Constellation Energy Group, Inc. and any of its affiliates that was an affiliate immediately
before the Effective Time (as such term is defined in the CEG Merger Agreement.) 
 1.11 “CEG Merger Agreement” means that
Agreement and Plan of Merger, dated as of April 28, 2011, by and among Exelon Corporation, Bolt Acquisition Corporation and Constellation Energy Group, Inc. 

1.12 “Code” means the Internal Revenue Code of 1986, as amended, or any superseding provision of law. 

1.13 “Company” means, (i) prior to the Merger Date, PECO Energy Company, a Pennsylvania corporation (known prior to
January 1, 1994 as the “Philadelphia Electric Company”), and any Affiliate of PECO Energy Company which adopts this Plan, and (ii) on and after the Merger Date, Exelon Corporation, PECO Energy Company, and any Affiliate of Exelon
Corporation set forth on Appendix I which adopts this Plan either with respect to all Employees or a particular group of Employees of such Affiliate. Appendix I shall be updated from time to time by the Company to reflect any such adoption, but the
failure to so update such Appendix shall not affect the effectiveness of any such adoption. Such adoptions will be effective whether occurring before, on or after the Effective Date and whether or not reflected in Appendix I. 

  
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 1.14 “Compensation” means: 

(a) for service prior to January 1, 1939 – normal full-time wages or salary at the established payroll rates; 

(b) for service subsequent to December 31, 1938 wages, salary, and any other remuneration actually paid or credited to the
Employee in recompense for his services as an Employee, including such amounts contributed at the direction of the Employee to the PECO Energy Company Employee Savings Plan, the Exelon Corporation Employee Savings Plan, the PECO Energy Company
Employees’ Section 125 Plan, the Exelon Corporation Benefits Contributions Options, the Exelon Corporation Flexible Benefits Program or, effective January 1, 2002, amounts contributed on a pre-tax basis to a qualified transportation
fringe benefit plan under Code Section 132(f)(4); 
 (c) effective for plan years beginning on or after
December 12, 1994, for purposes of subsection (b) above, a Participant’s Compensation shall include the Compensation that the Participant would have received during a period of Qualified Military Service (or, if the amount of such
Compensation is not reasonably certain, the Participant’s average earnings from the Company or an Affiliate for the twelve-month period immediately preceding the Participant’s period of Qualified Military Service); provided, however, that
the Participant returns to work within the period during which his right to reemployment is protected by law. 
 The remuneration of an Employee who is
absent for the purposes described in one of Sections 1.22(a) through 1.22(e) shall be deemed to continue at his base rate in effect immediately prior to the start of his absence; provided, however, that no Compensation shall be imputed under this
sentence for any period prior to June 1, 1992 during which the Employee is receiving benefits under the Company’s Disabilitant Plan. Effective January 1, 1990, Compensation shall not include any lump sum payment of an Employee’s
vacation pay or sick pay, nor any severance payment made by the Company or an Affiliate or pursuant to any plan maintained by the Company or an Affiliate. Compensation shall include annual incentive award payments under the Exelon Corporation Annual
Incentive Award Program and quarterly incentive payments under the Exelon Corporation Quarterly Incentive Award Program payable with respect to years beginning on or after January 1, 2002. 

Notwithstanding the foregoing, (i) Compensation for a Power Team Employee shall not include any Compensation earned while such Employee is a Power Team
Employee; (ii) for an individual who retires after December 31, 1993 and prior to January 1, 1996, “Compensation” shall include all accrued vacation, accrued sick pay and severance payments for purposes of
Section 3.1(a)(2) and 4C.3(a)(1)(A)(II); and (iii) Compensation for an EIS Senior Management Employee shall not include any Compensation earned after October 31, 1999 or the date on which such Participant becomes an EIS Senior
Management Employee, if later. 
 1.15 “Corporate Investment Committee” means the Company acting through the Committee consisting
of the executives or other persons designated from time to time in the charter of such Committee. 

  
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 1.16 “Covered Compensation” means, as of any date of reference, the average of the
taxable wage base in effect under the Social Security Act, as amended, in each of the thirty-five (35) consecutive years ending with the year prior to such Plan Year; provided however, that (i) for any Participant who has attained Age 65,
“Covered Compensation” will at all times thereafter be “Covered Compensation” for the Plan Year in which the Participant attained Age 65, (ii) for any Participant who retires after December 31, 1993 and on or before
January 1, 1995, Covered Compensation will be determined as of the year-end 1993, and (iii) for any Participant who retires after December 31, 1994 and on or before January 1, 1996, Covered Compensation will be determined as of
year-end 1994. 
 1.12A “EIS” means Exelon Infrastructure Services, Inc. 

1.12B “EIS Senior Management Employee” means an Employee of PECO Energy Company who is assigned to perform services for EIS on a
full-time basis in a position that is eligible to participate in the EIS Long Term Incentive Plan. 
 1.17 “Eligibility Computation
Period” means, with respect to any Employee, the twelve-month period beginning on his Employment Date and all calendar years beginning after his Employment Date. 

1.18 “Eligibility Year” means a credit awarded as follows, subject to Article VI: 

(a) Each Employee as of December 31, 1975, shall be credited with a number of Eligibility Years equal to the greater of:

 (1) one Eligibility Year for each full year of the Employee’s service as of that date under the Plan as then in
effect; or 
 (2) one Eligibility Year for each Eligibility Computation Period beginning before January 1, 1976, in
which the Employee completed at least 1,000 Hours of Service, disregarding any Eligibility Computation Period that would have been disregarded under Article VI if it had applied at the time in question. 

(b) Each Employee shall be credited with one Eligibility Year for each Eligibility Computation Period beginning after
December 31, 1975, in which he completes 1,000 or more Hours of Service. 
 1.19 “Eligible Employee” means an Employee
employed by the Company or on leave during a period of Qualified Military Service and, for the time period beginning on the Merger Date, who (a) was an Eligible Employee prior to the Merger Date or (b) first becomes an Employee on or after
the Merger Date and is employed initially at a facility owned immediately before the Merger Date by PECO Energy Company or an Affiliate that was an Affiliate of PECO Energy Company immediately before the Merger Date. 

Notwithstanding the foregoing, an Eligible Employee shall not include (i) an Employee who is employed by a joint venture in which the Company is a joint
venturer, (ii) an Employee whose wages are subject to collective bargaining except to the extent a collective bargaining agreement 

  
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relating to him so provides, (iii) a probationary Employee, (iv) an Employee who is an Employee solely by reason of being a leased employee within the meaning of Section 414(n) or
414(o) of the Code, (v) an Employee who executes a written waiver of his right to participate in the Plan (vi) an individual who is an independent contractor or any other person who is not treated by the Company or an Affiliate as an
Employee for the purposes of withholding federal employment taxes, regardless of any contrary governmental or judicial determination relating to such employment status or tax withholding, (vii) on or after the Effective Time, an individual who
was employed immediately prior to the Effective Time (as such term is defined in the CEG Merger Agreement) at CEG or a facility owned immediately before the Effective Time by CEG or (viii) an individual who is newly employed on or after the
Effective Time (as such term is defined in the CEG Merger Agreement) at a facility owned immediately before the Effective Time by CEG. 
 Notwithstanding
the foregoing, an Eligible Employee shall not include any Power Team Employee while he is a Power Team Employee, or any Employee of the Exelon Generation Company, LLC Power Team division who is a participant in the Commonwealth Edison Company
Service Annuity System. 
 Notwithstanding the foregoing, effective October 31, 1999, an Eligible Employee shall not include any EIS Senior Management
Employee. EIS Senior Management Employees hired on or after October 1, 1999 shall not be eligible to participate in the Plan. 
 Notwithstanding
anything herein to the contrary, subject to the provisions relating to rehired employees in Section 2.10, no Employee who was not a Participant before January 1, 2001 shall be eligible to participate in the Plan after December 31,
2000. 
 An Eligible Employee who transfers employment to the Exelon Generation Company, LLC Power Team division during 2003 shall remain an Eligible
Employee until December 31, 2003. An individual who has a benefit under this Plan and who transfers employment from the Exelon Generation, LLC Power Team division to a participating employer in this Plan shall not be an Eligible Employee prior
to January 1, 2004. 
 Notwithstanding anything contained herein to the contrary, an Eligible Employee shall not include an individual who has received
a Special Lump Sum Payment or an Immediately Commencing Annuity in accordance with Section 5.11. 
 1.20 “Employee” means a
person who is employed by the Company or an Affiliate or is absent under circumstances included in his Employment. An individual shall be deemed to be actively employed by the Company or an Affiliate if such individual is employed directly by the
Company or an Affiliate or is a leased employee within the meaning of Section 414(n) or 414(o) of the Code with respect to whose services the Company or Affiliate is the recipient and to whom Section 414(n)(5) of the Code does not apply.
An individual who receives a back pay award from the Company or an Affiliate shall be deemed to be an Employee for the period for which back pay is awarded. An Employee shall cease to be such on his retirement, resignation, discharge, or death.
Notwithstanding the foregoing, the term “Employee” shall not include independent contractors or any other persons who are not treated by the Employer as employees for purposes of withholding federal employment taxes, regardless of any
contrary governmental or judicial determination relating to such employment status or tax withholding. 

  
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 1.21 “Employer” means the Company. 

1.22 “Employment” means active employment by the Company or an Affiliate. In addition, any of the following types of absence shall
be counted as Employment (on the same work schedule under which the Employee was employed by the Company or Affiliate immediately prior to the absence) if it immediately follows a period of active employment with the Company or an Affiliate: 

(a) absence due to a period of Qualified Military Service, if the Employee resumes work with the Company or an Affiliate,
following discharge, within the time specified by then applicable laws. 
 (b) absence resulting from disability on account
of illness or accident during which the Employee is eligible for and receives disability benefits under a disability benefit plan sponsored by the Company or an Affiliate. 

(c) absence which the Company or an Affiliate certifies was for good cause. 

(d) leave of absence granted by the Company or an Affiliate. 

(e) lay-off, if the Employee returns to work within such period as may be specified in the rules of the Company or Affiliate in
effect at the time of reference. 
 (f) absence during which regular remuneration is paid. 

1.23 “Employment Date” means the day on which an Employee completes his first Hour of Service. 

1.24 “Fund” means the assets accumulated for purposes of the Plan. 

1.25 “Highly Compensated Employee” means, effective January 1, 2006, an Employee who performs services for the Company or an
Affiliate during the current Plan Year who was: 
 (a) an Employee who was, at any time during the current Plan Year or in
the immediately preceding Plan Year, a 5% owner, as defined in Section 416(i)(1) of the Code; or 
 (b) an Employee who,
during the immediately preceding Plan Year, both (1) received compensation (as defined in Section 415(c)(3) of the Code plus, for Plan Years beginning after December 31, 2000, amounts excluded from income under Section 132(f)(4)
of the Code) from the Company or an Affiliate in excess of $80,000, as adjusted by the Secretary of the Treasury in accordance with Section 415(d) of the Code, and (2) was in the group of employees consisting of the top 20% of the
employees of the Company and its Affiliates when ranked on the basis of compensation paid during the preceding Plan Year. 

  
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 1.26 “Hour of Service” means, for each Employee, a credit used to measure his service
for various purposes under the Plan. Hours of Service are credited as follows: 
 (a) Each hour which is not included in a
period described in Paragraph (b), below, but for which the Employee is directly or indirectly paid or entitled to payment by the Company or an Affiliate, for the performance of duties or otherwise, including back pay, without regard to mitigation
of damages, shall count as one Hour of Service. Notwithstanding the preceding sentence, no Hours of Service shall be credited under this Paragraph (a) to the extent such credit will cause the Employee to be credited with more than 501 Hours of
Service (including Hours of Service credited under Paragraph (b)) with respect to any single continuous period during which the Employee performs no duties; provided, however, that this limit shall not apply in the case of an award of back pay to
the extent the award so specifies. 
 (b) Each week of absence for Qualified Military Service from which the Employee returns
to the Company or an Affiliate with legally protected reemployment rights shall count as a number of Hours of Service determined under subsection (e) if the Employee was employed in a position designated as full-time immediately before the
period of Qualified Military Service or, if subsection (e) does not apply, a number of Hours of Service equal to the number of hours of work in the Employee’s customary week of work at the time the absence began. 

(c) Hours of Service for the performance of duties shall be credited to the Employee for the computation period or periods in
which the services are performed. Hours of Service for non-performance of duties shall be credited to the Employee for the computation period or computation periods in which the non-performance of duties occurs. Hours of Service for back pay shall
be credited to the Employee for the computation period or computation periods to which the award or agreement pertains rather than the computation period or periods in which it was made. 

(d) Solely for purposes of determining whether a One-Year Break in Service (as defined in Article VI) has occurred in an
Eligibility Computation Period or a Vesting Computation Period, an Employee who is absent from work for Maternity/Paternity Leave shall receive credit for the Hours of Service which would otherwise have been credited to such Employee but for such
absence, or in any case in which such Hours of Service cannot be determined, eight Hours of Service per day of such absence. An Employee shall be credited with Hours of Service under this Paragraph (d) in the computation period in which the
absence begins if necessary to prevent a Break in Service in that period, or, in all other cases, in the following computation period. 

(e) An Employee who is employed by the Company or an Affiliate shall be credited with forty-five (45) Hours of Service for
each week during which he is otherwise entitled to be credited with at least one Hour of Service. Paragraphs (a)-(c) notwithstanding, Hours of Service shall be credited at least as liberally as required by Department of Labor Regulation
§2530.200b-2(b) and (c). 

  
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 (f) In the case of an Employee who is such solely by reason of service as a
leased employee (within the meaning of Section 414(n) or 414(o) of the Code), Hours of Service shall be credited as if such Employee were employed and paid with respect to such service (or with respect to any related absences or entitlement) by
the Company or the Affiliate that is the recipient thereof. 
 1.27 “Investment Office” means the Company acting through the
Exelon Investment Office. 
 1.28 “Maternity/Paternity Leave” means, for any Employee, an absence: 

(a) by reason of the Employee’s pregnancy; 

(b) by reason of the birth of the child of the Employee; 

(c) by reason of placement of the child with the Employee in connection with the adoption of such child by the Employee; or

 (d) for purposes of caring for such child for a period immediately following such birth or placement. 

1.22A “Merger Date” means the effective date of the merger of Unicom Corporation with and into Exelon Corporation. 

1.29 “Normal Retirement Date” means, for each Employee, the first day of the calendar month coincident with or next following the
date he attains Age 65, except that the Normal Retirement Date of an Employee who becomes an Active Participant in the Plan after attaining Age 60 shall be the first day of the calendar month coincident with or next following the fifth anniversary
of the date on which the Employee became an Active Participant. 
 1.30 “Participant” means (a) an Eligible Employee who has
become an Active Participant under Article II, and (b) a former Active Participant whose Accrued Benefit and Benefit Years have not been canceled under Section 6.2 or have been restored under Section 6.5. An individual shall cease to
be a Participant upon the date the individual is no longer eligible to receive a benefit from this Plan (including, without limitation, upon his or her receipt of a Special Lump Sum Payment as defined in Section 5.11). 

1.31 “Plan” means the Service Annuity Plan set forth herein, provided that, on and after January 1, 1994, the Plan shall be
known as the “Service Annuity Plan of PECO Energy Company” and on and after January 1, 2003, the Plan shall be known as the “Service Annuity Plan of PECO Energy Company under the Exelon Corporation Retirement Program.” 

1.32 “Plan Year” means a calendar year after 1975. The Plan Year shall be the limitation year for purposes of computing limitations
on contributions, benefits and allocations. 

  
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 1.26A “Power Team Employee” means an Employee who is employed by the Exelon Generation
Company, LLC Power Team division or its successor, and (i) who was not eligible to participate in the Plan before January 1, 2001, or (ii) who was eligible to participate in the Plan before January 1, 2001 but is eligible to
participate in the performance share award program for Power Team employees under the Exelon Corporation Long Term Incentive Plan or any predecessor or successor incentive compensation program applicable to employees of the Power Team division. An
Employee who is described in clause (ii) of the preceding sentence will be a Power Team Employee only during the period in which he satisfies clause (ii). 

1.33 “Qualified Joint and Survivor Annuity” means the form of pension benefit described in this Section. Under a Qualified Joint and
Survivor Annuity payments begin on the date provided in Article IV and continue until the first day of the month following the month in which the Participant’s death occurs. On the first day of the second month following the month of the
Participant’s death, payments in an amount equal to 50% of the amount payable to the Participant begin to his surviving Spouse, but only if the Spouse was married to the Participant on the Participant’s Benefit Commencement Date. Such
payments to the Spouse shall end on the first day of the month following the month in which the Spouse’s death occurs. The anticipated payments under a Qualified Joint and Survivor Annuity shall be the Actuarial Equivalent of a pension in the
form of a Single Life Annuity in the amount set forth in Article IV. 
 1.27A “Qualified Military Service” means any service in
the uniformed services (as defined in chapter 43 of title 38, United States Code) where the Participant’s right to reemployment is protected by law. 

1.34 “Required Beginning Date” means April 1 of the calendar year following the later of (a) the calendar year in which
the Participant attains Age 70-1/2; or (b) in the case of a Participant who is not a 5% owner (within the meaning of Section 416(i) of the Code), the calendar year in which the Participant’s Separation from Service occurs.
Notwithstanding the foregoing, a Participant who is not a 5% owner (as defined above), reached age 70-1/2 in 1999 or 2000, and has not incurred a Separation from Service may elect April 1, 2000 or April 1, 2001, respectively, as his
Required Beginning Date. 
 1.35 “Separation from Service” means the termination of an Employee’s status as an Employee or
any absence of an Employee in Employment which is not described in Section 1.22. 
 1.36 “Single Life Annuity” means a form
of pension benefit under which payments begin on the date provided in Article IV and end on the first day of the month following the month in which the Participant’s death occurs. 

1.37 “Social Security Retirement Age” means (a) for any individual born before January 1, 1938, Age 65, (b) for any
individual born after December 31, 1937, but before January 1, 1955, Age 66, or (c) for any individual born after December 31, 1954, Age 67. 

1.38 “Spouse” means the individual who is a husband or wife of a Participant as the result of a legal union between one man and one
woman, within the meaning of the Defense of Marriage Act. 

  
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 1.39 “TXU Participant” means a Participant who participated in the TXU Pension Plan
immediately prior to the closing date of the acquisition of TXU by the company and whose benefit under the TXU Pension Plan was determined using the final average pay formula (and not the cash balance plan formula). 

1.40 “Vesting Computation Period” means a calendar year. 

1.41 “Vesting Year” means a credit awarded as follows, subject to Article VI: 

(a) Each Employee as of December 31, 1975, shall be credited with a number of Vesting Years equal to his years of service
(with fractions rounded to the next full year) under the Plan as in effect on that date. 
 (b) Each Employee shall be
credited with one Vesting Year for each Vesting Computation Period after 1975 in which he completes 1,000 or more Hours of Service. 

(c) If an Employee is credited with an Eligibility Year for an Eligibility Computation Period that overlaps two Vesting
Computation Periods, but he is not credited with a Vesting Year for either of those Vesting Computation Periods, the Employee shall be credited with one Vesting Year. An Employee may have only one Vesting Year to his credit under this Paragraph at
any time. 
 (d) An Employee shall be deemed to have completed a Vesting Year when he completes his one-thousandth Hour of
Service in the relevant Vesting Computation Period. 
 1.42 The masculine gender shall include the feminine. 

ARTICLE II Participation. 
 2.1 Each Eligible
Employee who is covered by the Plan as of December 31, 1975 shall be an Active Participant as of January 1, 1976. 
 2.2 Each
other Eligible Employee shall become an Active Participant on the later of January 1, 1976 or January 1 of the first Eligibility Computation Period in which he completes 1,000 Hours of Service. 

2.3 If a former Eligible Employee is not an Eligible Employee on the date on which he would otherwise become an Active Participant under
Section 2.2, he shall not then become an Active Participant but shall become an Active Participant on the first day thereafter on which he is an Eligible Employee, provided that if he has a Separation from Service before becoming an Active
Participant, Section 6.4 shall apply. 
 2.4 Participation Freeze for Power Team Employees. Notwithstanding the foregoing, all
participation in the Plan by Power Team Employees shall be frozen as of the date the Employee becomes a Power Team Employee. 

  
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 2.5 Participation Freeze for EIS Senior Management Employees. Notwithstanding the foregoing, all
participation in the Plan by EIS Senior Management Employees shall be frozen as of October 31, 1999, or the date such Participant becomes an EIS Senior Management Employee, if later, and no Employee who is an EIS Senior Management Employee
shall be eligible to become a Participant in the Plan after October 31, 1999. 
 2.6 Participation Freeze for all Employees after
December 31, 2000. Notwithstanding anything herein to the contrary, but subject to the provisions of Section 2.10 or 2.11, no Employee who is not a Participant on December 31, 2000 shall be eligible to participate in the Plan after
December 31, 2000. 
 2.7 Transfer of Employment to or Reemployment in Positions Eligible for Participation in the Plan or the
Commonwealth Edison Company Service Annuity System by Certain Individuals Who Were Participants in Such a Plan on December 31, 2000. If a Participant who was a Participant on December 31, 2000 transfers employment to or is reemployed by
the Company or an Affiliate in a job classification with respect to which similarly situated employees of the Company or Affiliate are not eligible to participate in the Plan but are instead eligible to participate in the Commonwealth Edison Company
Service Annuity System (or would be so eligible but for their election to participate in the Exelon Corporation Cash Balance Pension Plan), then such individual shall upon such transfer or reemployment remain a Participant in the Plan and shall not
participate in the Commonwealth Edison Company Service Annuity System. If a participant in the Commonwealth Edison Company Service Annuity System who was a participant in such plan on December 31, 2000 transfers employment to or is reemployed
by the Company or an Affiliate in a management job classification with respect to which similarly situated employees of the Company or Affiliate are eligible to participate in the Plan (or would be so eligible but for their election to participate
in the Exelon Corporation Cash Balance Pension Plan), then such individual shall upon such transfer or reemployment remain a participant in the Commonwealth Edison Company Service Annuity System and shall not participate in the Plan. 

2.8 Pension Choice Election. 

(a) In General. Each Participant who is, as of January 1, 2002, an Eligible Employee shall be permitted to elect, in the
time and manner prescribed by the Administrator, to either (i) continue participating in the Plan on and after January 1, 2002 or (ii) cease participating in the Plan as of December 31, 2001 and begin participating in the Exelon
Corporation Cash Balance Pension Plan as of January 1, 2002. Each Eligible Employee who elects to continue participating in the Plan or who is offered and fails to make any such election shall continue to be a Participant as of January 1,
2002. Each Eligible Employee who elects to participate in the Exelon Corporation Cash Balance Pension Plan in lieu of participation in this Plan shall cease participation in the Plan as of December 31, 2001 and shall not be entitled to any
benefit under the Plan, unless such Participant receives a notification (the “Notice”) from the Company that his employment with the Company and the Affiliates will be terminated on or before December 31, 2002 and that such
Participant is eligible for benefits under Article IVE of the Plan or any severance plan maintained by the Company or an Affiliate. An Eligible Employee who receives a Notice shall continue to be a Participant in the Plan until his Separation from

  
 12 

 
Service, notwithstanding such Eligible Employee’s election to participate in the Exelon Corporation Cash Balance Pension Plan. An Eligible Employee (i) who receives a Notice, but whose
employment does not terminate on or before December 31, 2002, or (ii) whose employment terminates before December 31, 2002 without the Employee receiving a Notice, shall cease participation in the Plan as of December 31, 2001 if
such Employee elects, in the time and manner prescribed by the Administrator, to participate in the Exelon Corporation Cash Balance Pension Plan. 

Effective as of January 1, 2004, each Eligible Employee who (i) was eligible to participate in the Plan as of
December 31, 2000, (ii) ceases to be a Power Team Employee as of January 1, 2004 because such Eligible Employee is no longer eligible to participate in the performance share award program for Power Team employees under the Exelon
Corporation Long Term Incentive Plan and (iii) did not previously make a valid election pursuant to the preceding paragraph shall be permitted to elect, in the time and manner prescribed by the Committee, to either (i) participate in the
Exelon Corporation Cash Balance Pension Plan in lieu of this Plan as of January 1, 2004 or (ii) continue or resume participation in the Plan as of January 1, 2004. Each such Eligible Employee who affirmatively elects to continue or
resume participation in this Plan in lieu of participation in the Exelon Corporation Cash Balance Pension Plan shall continue or resume participation in this Plan as of January 1, 2004. 

(b) Transfer of Benefits and Assets to Cash Balance Pension Plan. If an Eligible Employee described in paragraph (a) above
elects to participate in the Exelon Corporation Cash Balance Pension Plan in lieu of participating in the Plan, the Employee’s pension, determined as of December 31, 2001, or December 31, 2003, as the case may be, based on the
Employee’s Benefit Years, Compensation and average annual base salary as of such date, shall be transferred to the Exelon Corporation Cash Balance Pension Plan, and such Employee shall not accrue any additional benefit under the Plan. An amount
of assets that is equal to the present value of the Participant’s pension described in the preceding sentence, determined using the methods and assumptions prescribed by Section 4044 of ERISA, shall also be transferred to the Exelon
Corporation Cash Balance Pension Plan. Such transfer of benefits and assets related thereto shall occur as soon as administratively practicable after the Eligible Employee makes the election described in paragraph (a) above. In the event that
an Eligible Employee whose pension and related assets are transferred to the Exelon Corporation Cash Balance Pension Plan receives a Notice and has a Separation from Service on or before December 31, 2002, the pension and related assets that
were transferred to the Exelon Corporation Cash Balance Pension Plan shall be transferred back to the Plan and the amount of the pension benefit accrued by such Employee during 2002 (if any) shall be determined under the terms of this Plan rather
than the Exelon Corporation Cash Balance Pension Plan. Such transfer shall occur as soon as administratively practicable. 
 2.9 Cessation
of Participation. An individual’s participation in the Plan shall cease upon the first to occur of (i) the date the individual is no longer eligible to receive a benefit from this Plan or (ii) the individual’s Separation from
Service if the individual has not completed at least five Vesting Years upon the date of his Separation from Service. 

  
 13 

 2.10 Rehire of Employees. The following rules shall apply to an Eligible Employee who is rehired
by the Company after a Separation from Service and prior to commencing his pension or any benefits under the Exelon Corporation Cash Balance Pension Plan, as applicable: 

(a) Rehire Date Before Absence of 5 Consecutive One-Year Breaks in Service. If an Employee terminates employment and is later
rehired by the Company before having an absence from employment with the Company and the Affiliates of five consecutive One-Year Breaks in Service, then either: (1) if such Employee was a Participant on the date his employment terminated, such
Employee shall be a Participant in the Plan as of his rehire date if he is then an Eligible Employee, or (2) if such Employee was not a Participant on the date his employment terminated, such Employee shall not be an Eligible Employee and shall
not become a Participant. Notwithstanding clause (1) of the preceding sentence, if an Eligible Employee described in the preceding sentence was not at any time permitted to make the election described in Section 2.8(a) or was permitted to
make such election and elected to participate in the Exelon Corporation Cash Balance Pension Plan but such election was not given effect as a result of such Employee’s Separation from Service, such Eligible Employee shall be permitted to elect,
in the time and manner prescribed by the Administrator, to either (1) participate in the Plan as of his rehire date or (2) participate in the Exelon Corporation Cash Balance Pension Plan at the time prescribed therein and have his pension
and related assets transferred to such plan in the manner described in Section 2.8(b). 
 (b) Rehire Date After Absence
of at Least 5 Consecutive One-Year Breaks in Service. If an Employee terminates employment with the Company and the Affiliates and the Employee was not a Participant or was a Participant who did not have a vested pension as of the date his
employment terminated, and such Employee is rehired by the Company after having an absence from employment with the Company and the Affiliates of at least five consecutive One-Year Breaks in Service, such Employee shall not be an Eligible Employee
and shall not become a Participant upon such rehire. If a Participant with a vested pension terminates employment with the Company and the Affiliates and the Participant is rehired after having an absence from employment with the Company and the
Affiliates of at least five consecutive One-Year Breaks in Service, such Participant shall remain a Participant upon his rehire. Notwithstanding the preceding sentence if a Participant described in the preceding sentence was not at any time
permitted to make the election described in Section 2.8(a), or was permitted to make such election and elected to participate in the Exelon Corporation Cash Balance Pension Plan but such election was not given effect as a result of such
Employee’s Separation from Service, such Eligible Employee shall be permitted to elect, in the time and manner prescribed by the Administrator, to either (1) participate in the Plan as of his rehire date or (2) participate in the
Exelon Corporation Cash Balance Pension Plan at the time prescribed therein and have his pension and related assets transferred to such plan in the manner described in Section 2.8(b). 

  
 14 

 (c) Circumstances Permitting Commencement of Pension. Notwithstanding anything
contained herein to the contrary, if a Participant terminates employment and is reemployed as an Employee under circumstances that satisfy the applicable conditions for continuation of payment of retirement benefits set forth in the Company’s
policy regarding the rehiring or retirees, such Participant may elect to commence his pension during such period of reemployment if he is otherwise eligible to commence such pension. 

(d) Rehire After Receipt of Benefit Under Section 5.11. Notwithstanding anything contained herein to the contrary, an
Employee who is reemployed by an Employer after December 1, 2012 and has received a Special Lump Sum Payment or an Immediately Commencing Annuity in accordance with Section 5.11 shall not be eligible to become a Participant pursuant to
this Article 2. 
 2.11 Change in Employment Status or Transfer to Affiliate. Except as otherwise provided herein, if an Employee who was a
Participant transfers employment to or is reemployed by an Employer or an Affiliate in a job classification with respect to which similarly situated employees of such Employer or Affiliate are not eligible to participate in the Plan but are instead
either eligible to participate in another plan maintained by such Employer or Affiliate or are not eligible to participate in any plan, then such individual shall upon such transfer or reemployment participate in the plan, if any, determined
pursuant to rules established by the Company, which rules may be set forth in a Supplement hereto. 
 2.12 Certain Rehired Employees.
Notwithstanding anything contained herein to the contrary, no Employee who has received a Special Lump Sum Payment or an Immediately Commencing Annuity in accordance with Section 5.11 shall be eligible to become a Participant pursuant to this
Article 2. 
 2.13 Transfer of Employment to or from Facilities formerly Owned by CEG. Effective as of the Effective Time (as such term is
defined in the CEG Merger Agreement), if a Participant who was a Participant on or prior to the Effective Time transfers employment to or is reemployed by an Employer or an Affiliate in a job classification with respect to which similarly situated
employees of such Employer or Affiliate are not eligible to participate in the Plan but are instead eligible to participate in a Company Benefit Plan (as such term is defined in the Merger Agreement) that is intended to be a defined benefit pension
plan qualified under Section 401(a) of the Code (each such plan, a “CEG Pension Plan”) , then such individual shall upon such transfer or reemployment remain a Participant in the Plan and shall not participate in the CEG Pension Plan.
If a participant in the CEG Pension Plan who was a participant in such plan on or prior to the Effective Time transfers employment to or is reemployed by an Employer or an Affiliate in a job classification with respect to which similarly situated
employees of such Employer or Affiliate are not eligible to participate in such plan but are instead eligible to participate in the Plan, then such individual shall upon such transfer or reemployment remain a participant in the CEG Pension Plan and
shall not participate in the Plan. 

  
 15 

 ARTICLE III Accrual of Benefits. 

3.1 Accrued Benefit. Except as otherwise provided in this Article or in Article VI, each Participant shall have an Accrued Benefit equal to
one-twelfth of the greater of: 
 (a) The sum of (1) 2% of his average annual Compensation during the period of his
service, if any, between January 1, 1930 and December 31, 1938, inclusive, multiplied by his Benefit Years before January 1, 1939, and (2) 2% of his aggregate Compensation for employment as an Eligible Employee after
December 31, 1938, or 
 (b) The sum of (1) a percentage of his average annual base salary plus, after
December 31, 2001, amounts earned (whether paid in the current or subsequent period) under the Exelon Corporation Annual Incentive Award Program for Management Employees, and the Exelon Corporation Quarterly Incentive Award Program (but
excluding amounts earned under any other business or group incentive or bonus programs) during his 60 consecutive months of employment with the Company that yield the highest twelve month average equal to 5% plus 1.2% for each of his first forty
Benefit Years, and (2) 0.35% of such highest average in excess of Covered Compensation as of the date of reference, multiplied by his Benefit Years (up to a maximum of 14%). (For the purposes of this Paragraph (b), (A) employment during
the most recent 5 years shall include absences which are included in Employment, except an absence prior to June 1, 1992 during which an Employee receives benefits under the Company’s Disabilitant Plan, and the average annual base salary
of an Employee on an included absence shall be calculated as if his base salary continued during any period of such absence for which he did not receive compensation, such salary to be that in effect when such period began, adjusted for increases
applicable to his job classification which occur prior to the end of such period, (B) with respect to a Participant who is employed by the Company for less than 60-consecutive months, the Participant’s average annual base salary shall be
determined by averaging the Participant’s annual base salary for each calendar year in which the Participant was at any time an Employee, determined as if the Participant had remained an Employee for the entire year, provided, that, if there
are more than 5 such calendar years, the 5 years which result in the highest average will be used, (C) for purposes of determining consecutive months of employment, months in which the Participant performs no services, other than months for
which salary is imputed under (A) above, shall be disregarded, (D) annual base salary shall be determined prior to reduction by amounts contributed at the direction of the Employee to the PECO Energy Company Employee Savings Plan, the
Exelon Corporation Employee Savings Plan, the PECO Energy Company Employees’ Section 125 Plan, the Exelon Corporation Benefits Contributions Options, the Exelon Corporation Flexible Benefits Program, or for Plan Years beginning after
December 31, 2001, amounts contributed to a qualified transportation fringe benefit plan under Section 132(f)(4) of the Code, (E) effective January 1, 1990, a Participant’s annual base salary shall not include any lump sum
payment of his accrued vacation pay or sick pay, nor any severance payment made by the Company or an Affiliate or pursuant to any plan maintained by the Company or any Affiliate), (F) effective January 1, 1996 for purposes of calculating
average annual base salary, any raise received during the month shall be deemed to have been received on the first of such month and (G) amounts earned under the Exelon Corporation Annual Incentive Award Program for Management Employees and the
Exelon Corporation Quarterly Incentive Award Program shall be credited for the period such amounts are earned, regardless of when such amounts are actually paid). 

  
 16 

 A Participant’s Accrued Benefit, however, shall not be less than the largest early retirement benefit that
he could at any time elect to receive under the Plan. For purposes of the preceding sentence, the early retirement benefit that a Participant may elect to receive at any time of reference is the monthly annuity which, assuming he had a Separation
from Service on the date of reference, would be payable to him in the form of a Single Life Annuity beginning as of the later of the day ten years prior to his Normal Retirement Date or the first day of the month following the date of reference.

 Notwithstanding the foregoing, the Accrued Benefit of a Power Team Employee shall be frozen as of the date the Employee becomes a Power Team Employee and
no Power Team Employee shall earn any additional Accrued Benefit under the Plan while the Employee is a Power Team Employee. The calculation of the benefit of a Power Team Employee under subsection (a) and (b) shall be made without regard
to any Compensation, annual base salary or earnings attributable to any period while the Employee is a Power Team Employee. 
 Notwithstanding the
foregoing, an EIS Senior Management Employee’s Accrued Benefit shall be frozen as of October 31, 1999, or the date such Participant becomes an EIS Senior Management Employee, if later, and no EIS Senior Management Employee shall earn any
additional Accrued Benefit under the Plan after such date. The calculation of an EIS Senior Management Employee’s benefit under subsection (a) and (b) shall be made without regard to any Compensation, annual base salary or earnings
attributable to any period after October 31, 1999, or the date such Participant becomes an EIS Senior Management Employee, if later. 
 Notwithstanding
the foregoing provisions of this Section 3.1, the Accrued Benefit for a TXU Participant shall be equal to the greater of (1) such Participant’s accrued benefit under the TXU Pension Plan immediately prior to the closing date of the
acquisition of TXU by the Company, and (2) such Participant’s Accrued Benefit determined under subsection (b) above, calculated by including compensation earned by the Participant while he was employed by TXU to the extent such
compensation would have been included under subsection (b) if TXU had been part of the Company during the relevant time period and by including the years of service that were credited to the Participant under the TXU Pension Plan immediately
prior to the closing date of the acquisition of TXU by the Company. 
 3.2 Minimum Accrued Benefit. Except as provided in Section 6.5:

 (a) as a result of the imposition of the $200,000 cap on compensation under Section 401(a)(17) of the Code effective
January 1, 1989 pursuant to Section 3.3, the Accrued Benefit of a Section 401(a)(17) Employee determined as of any date on or after January 1, 1989 and prior to January 1, 1994 shall not be less than the sum of: 

(1) his Accrued Benefit determined as of December 31, 1988 under the provisions of the Plan as in effect through
December 31, 1988; plus 
 (2) the Participant’s Accrued Benefit determined under Section 3.1 based on the
Participant’s Benefit Years earned on and after January 1, 1989 and before January 1, 1994; 

  
 17 

 (b) as a result of the reduction of the $200,000 cap on compensation under
Section 401(a)(17) of the Code to $150,000 effective January 1, 1994 pursuant to Section 3.3, the Accrued Benefit of a Section 401(a)(17) Employee determined as of any date on or after January 1, 1994 shall not be less than
the sum of: 
 (3) his Accrued Benefit under Section 3.1 as of December 31, 1993 or, to the extent applicable, his
Accrued Benefit under Section 3.2(a) as of December 31, 1993, if greater, determined in each case under the provisions of the Plan as in effect through December 31, 1993; provided, however, that, notwithstanding any provision of the
Plan to the contrary, base salary for any determination period (as defined in Section 3.3) that is taken into account in determining an Employee’s average annual base salary as of December 31, 1993 shall be subject to the
Section 401(a)(17) Compensation Limit (as defined in Section 3.3) in effect for 1993; plus 
 (4) the
Participant’s Accrued Benefit determined under Section 3.1 based on the Participant’s Benefit Years earned on and after January 1, 1994. 

For purposes of Section 3.2(a), a ‘Section 401(a)(17) Employee’ means an Eligible Employee who completes an Hour of Service on
or after January 1, 1989 and whose Accrued Benefit as of a date on or after January 1, 1989 and prior to January 1, 1994 is based on annual Compensation or base salary for a determination period (as defined in Section 3.3)
beginning prior to January 1, 1989 that exceeds $200,000. For purposes of Section 3.2(b), a ‘Section 401(a)(17) Employee’ means an Eligible Employee who completes an Hour of Service on or after January 1, 1994 and whose
Accrued Benefit as of a date on or after January 1, 1994 is based on annual Compensation or base salary for a determination period (as defined in Section 3.3) beginning prior to January 1, 1994 that exceeds $150,000. 

3.3 Application of Section 401(a)(17) Compensation Limit. Annual Compensation taken into account for purposes of Section 3.1(a) (and
Articles IVA, IVB and IVC) and annual base salary taken into account for purposes of Section 3.1(b) (and Articles IVA, IVB and IVC) shall not exceed $200,000 ($150,000, effective January 1, 1994), or such other amount as may be applicable
under Code Section 401(a)(17) (the ‘Section 401(a)(17) Compensation Limit’). Except as provided below, the Section 401(a)(17) Compensation Limit in effect for a calendar year applies to any period, not exceeding 12 months, over
which Compensation or base salary is determined (‘determination period’) and which begins in such calendar year. Annual base salary for any determination period beginning prior to 1989 that is taken into account in determining an
Employee’s average annual base salary for purposes of determining the Employee’s Accrued Benefit as of a date on or after January 1, 1989 but prior to January 1, 1994 shall be subject to the Section 401(a)(17) Compensation
Limit in effect for 1989. Annual base salary for any determination period beginning prior to 1994 that is taken into account in determining an Employee’s average annual base salary for purposes of determining the Employee’s Accrued Benefit
as of a date on or after January 1, 1994 shall be subject to the Section 401(a)(17) Compensation Limit in effect for 1994. 

  
 18 

 If a determination period consists of fewer than 12 months, the Section 401(a)(17)
Compensation Limit will be multiplied by a fraction, the numerator of which is the number of months in the determination period, and the denominator of which is 12. For Plan Years beginning before January 1, 1997, the family aggregation rules
of Sections 401(a)(17)(A) of the Code, as in effect on December 31, 1996, shall apply. 
 3.4 Transferred Employees. The Accrued
Benefit of a Participant who has ceased to be an Eligible Employee but who is still an Employee shall be calculated on the basis of his Compensation, average annual base salary, Benefit Years, and the formula in effect under this Article III as of
the last date on which he is an Eligible Employee. 
 3.5 Rehired Employees. A Participant who is reemployed as an Employee and who
continues, or commences, his pension payments during the period of his reemployment shall, as required to continue pension payments in accordance with the Company’s policy regarding the rehiring of retirees, waive participation in, or
additional benefits and accruals under the Plan and accordingly, shall not be entitled to accrue any additional benefits under the Plan during his period of reemployment. 

ARTICLE IV. Benefits. 
 4.1 Normal Retirement. If
an Active Participant has not already become vested pursuant to Section 4.4, he shall become fully vested in his Accrued Benefit when he attains Age 65, or, if later, upon the fifth anniversary of the date upon which he first became an Active
Participant and may retire on his Normal Retirement Date. Upon retiring, the Participant shall be entitled to a monthly annuity that begins as of the first day of the month following the month in which his Normal Retirement Date occurs and is equal
to his Accrued Benefit. 
 4.2 Postponed Retirement. 

(a) An employee may continue in service after his Normal Retirement Date. Except as provided in Section 4.11, an Active
Participant who continues in service after his Normal Retirement Date shall receive an annuity commencing as of the first day of the month following actual retirement, or as of his Required Beginning Date, if earlier. Such annuity shall be based
upon service, Compensation, average annual base salary and Covered Compensation measured as of the date he retires or his Required Beginning Date, whichever applies, and the benefit formula under Section 3.1 in effect as of such date. Effective
as of January 1, 2000, the annuity for an Employee whose Retirement Beginning Date is April 1 of the calendar year following the year in which he incurs a Separation from Service shall include an Actuarial Equivalent adjustment to reflect
commencement of payments after April 1 following the calendar year in which he attained age 70 1⁄2. The Actuarial Equivalent adjustment described in the
preceding sentence shall be made to Participant’s Accrued Benefit as of each December 31 following his Required Beginning Date and preceding his Separation from Service, with the last such adjustment made as of his Separation from Service,
and for each such year or portion of a year, shall reduce (but not below zero) any increase in the Participant’s Accrued Benefit for the year or portion of a year attributable to Benefit Years, Compensation, annual base salary, or changes in
Covered Compensation for that year or portion of a year. 

  
 19 

 (b) Notwithstanding Paragraph (a), effective January 1, 1994, an executive
shall continue as an Employee after his Normal Retirement Date only with the consent of the Company or an Affiliate. For purposes of this Paragraph (b), an “executive” means a Participant who: 

(1) Is (A) bona fide executive as defined in Title 29 Code of Federal Regulations §§541.1 and 1625.12 or
(B) employed in a high policy making position in the Company or an Affiliate within the meaning of Title 29 Code of Federal Regulations §1625.12; 

(2) Has attained Age 65; 

(3) Has been in a position described in Paragraph (1) for the two-year period immediately prior to his retirement; and

 (4) Is entitled to an immediate vested annual retirement pension, commencing at Age 65 (or retirement, if later), from all
employee pension, profit sharing, savings and deferred compensation plans sponsored by the Company and all Affiliates which equals, in the aggregate, at least $44,000 (or such other amount as may be prescribed pursuant to Title 29 Code of Federal
Regulations §541.1 from time to time). In calculating the annual retirement pension, (A) all benefits shall be adjusted in accordance with regulations prescribed by the Equal Employment Opportunity Commission so that the benefit is the
equivalent of a Single Life Annuity (with no ancillary benefits) under a plan to which employees do not contribute and under which no rollover contributions have been made and (B) there shall be excluded from the calculation of the retirement
pension amounts attributable to Social Security, employee contributions, contributions of prior employers, rollover contributions, and contributions described in Code §402(e)(3). 

(a) If a Participant’s Benefit Commencement Date precedes his actual retirement, the pension payable to the Participant
shall be determined as of the December 31 preceding his Benefit Commencement Date and adjusted as of January 1 in each calendar year following his Benefit Commencement Date, with the final adjustment to be made as of the date of his actual
retirement. Such annual adjustment shall include any increase (but not any decrease) in the Participant’s Accrued Benefit, determined in accordance with Article III, as a result of additional Benefit Years and Compensation and changes to
average annual base salary, since the Participant’s Benefit Commencement Date or the last such annual adjustment, whichever applies. 

4.3 Early Retirement. 

(a) Effective August 1, 2000, an Active Participant who terminates after he has attained Age 50 and has to his credit at
least 10 Vesting Years may retire and shall upon so retiring be entitled to a monthly annuity that begins, at his election, as of the first day of the month following his retirement or as of the first day of any subsequent

  
 20 

 
month, but not after the first month following his Normal Retirement Date. Such election may be made no earlier than 90 days prior to the Benefit Commencement Date elected by the Participant and
in no event earlier than the date on which the Participant receives the notice described in Section 5.5(a). The amount of the annuity under this Subsection 4.3(a) shall be equal to the Participant’s Accrued Benefit determined as of his
Benefit Commencement Date reduced as follows: 
  

					
	 Attained Age at Benefit
 Commencement
Date
	  	Reduction
Factor	 
	 64–60
	  	 	1.00	  
	 59
	  	 	0.98	  
	 58
	  	 	0.96	  
	 57
	  	 	0.93	  
	 56
	  	 	0.90	  
	 55
	  	 	0.87	  
	 54
	  	 	0.84	  
	 53
	  	 	0.81	  
	 52
	  	 	0.78	  
	 51
	  	 	0.75	  
	 50
	  	 	0.72	  

 Notwithstanding the foregoing provisions of this subsection (a), effective January 1, 2002, there shall be
no reduction to the Accrued Benefit of an Active Participant who is an hourly, nonexempt Eligible Employee and who has attained age 59 at the time of his Benefit Commencement Date. 

(b) Notwithstanding any other provision of the Plan to the contrary, a Participant who has ceased to be an Active Participant
because he is an EIS Senior Management Employee, or because he has ceased to be an Employee of the Company and has thereupon become an Employee of EIS, shall continue to be treated as an Active Participant for purposes of this Section 4.3 and,
effective January 1, 2002, Section 5.3, but not for any other provision of the Plan, so long as (i) he continuously remains an Employee of EIS or a wholly owned subsidiary of EIS and (ii) EIS continuously remains an Affiliate.

 (c) Notwithstanding any other provision of the Plan to the contrary, a Participant who has ceased to be an Eligible
Employee and Active Participant because he is a Power Team Employee, shall continue to be treated as an Active Participant for purposes of this Section 4.3 and, effective December 31, 1996, Section 5.3, but not for any other provision
of the Plan, so long as he continuously remains a Power Team Employee. 
 4.4 Deferred Annuity. Effective as of August 1, 2000, any
Participant who has a Separation from Service prior to satisfying the requirements for retirement under Sections 4.1-4.3 but at a time when he has to his credit at least five Vesting Years shall upon his Separation from Service be entitled to
receive a monthly annuity that begins as of the first day of the month 

  
 21 

 
following his Normal Retirement Date and is equal to his Accrued Benefit determined as of his Separation from Service. Alternatively, a Participant described in the preceding sentence may, at his
election, receive a monthly annuity that begins as of the first day of the month following his fiftieth birthday or, at his option, on the first day of any month thereafter but not after the first month following his Normal Retirement Date that is
equal to the Actuarial Equivalent of the Participant’s Accrued Benefit determined as of his Separation from Service. Any election of a Benefit Commencement Date prior to Normal Retirement Date made under this Section may be made no earlier than
90 days prior to the Benefit Commencement Date elected by the Participant and in no event earlier than the date on which the Participant receives the notice described in Section 5.5(a). 

4.5 Disabled Eligible Employees. A Participant who has become disabled within the meaning of the Company’s Disabilitant benefit plans
while an Eligible Employee shall continue to be credited with Benefit Years and Vesting Years during his period of Disabilitant to the extent set forth in Sections 1.7 (relating to Benefit Accrual Computation Period), 1.9 (relating to Benefit Year),
1.22 (relating to Employment) and 1.40 (relating to Vesting Service). If a disabled Participant has met the requirements to receive a pension under any Section of this Article IV (determined as if his Separation from Service had occurred on the date
of reference), such Participant may elect as his Benefit Commencement Date any date as may be provided under the applicable Section. If a disabled Participant continues to be credited with Benefit Years after his Benefit Commencement Date, the
amount of annuity payable to the Participant shall be determined as of his Benefit Commencement Date and shall be adjusted annually as of January 1 in each calendar year following his Benefit Commencement Date, up to and including the
January 1 next following the date the disabled Participant ceases to be credited with Benefit Years. Such annual adjustment shall include any increase (but not any decrease) in the Participant’s Accrued Benefit, determined in accordance
with Article III, as a result of additional Benefit Years and Compensation and changes to average annual base salary, since the Participant’s Benefit Commencement Date or the last such annual adjustment, whichever applies. In addition, such
annual adjustment shall be reduced (but not below zero) by the Actuarial Equivalent of any benefit paid to the Participant since his Benefit Commencement Date during any period (a) prior to Normal Retirement Date or (b) after Normal
Retirement Date that would have constituted “Section 202(a)(3)(B) Service” under Title 29 Code of Federal Regulations §2530.203-3(c)(1), to the extent not previously taken into account under this Section; provided, however, that the
amount, if any, of the benefits paid to the Participant which exceeds the amount the Participant would have received if distribution had been made in the normal form of benefits described in Section 5.1 or 5.2(a), whichever applies to the
Participant, shall be disregarded in determining the Actuarial Equivalent of such benefits for purposes of the reduction described in this sentence. 

4.6 Maximum Annuity. Notwithstanding any other provision of the Plan to the contrary, the amount of the Participant’s annual benefit (as
defined below) accrued, distributed or payable at any time under the Plan shall be limited to an amount such that such annual benefit and the aggregate annual benefit of the Participant under all other defined benefit plans maintained by the
Employer or any other Affiliate does not exceed the lesser of: 
 (i) $160,000 (as increased to reflect the cost of living
adjustments provided under Section 415(d) of the Code), multiplied by a fraction (not exceeding 1 and not less than 1/10th), the numerator of which is the Participant’s years of participation (within the meaning of Treas. Reg. §
1.415(b)-1(g)(1)(ii)) and the denominator of which is 10; or. 

  
 22 

 (ii) an amount equal to 100% of the Participant’s average compensation for
the 3 consecutive calendar years in which his compensation was the highest (as determined in accordance with Treas. Reg. § 1.415(b)-1(a)(5)) and which are included in his years of service (within the meaning of Treas. Reg. §
1.415(b)-1(g)(2)(ii)) with the Employers multiplied by a fraction (not exceeding 1 and not less than 1/10th), the numerator of which is the Participant’s years of service with the Employers and the denominator of which is 10. 

The dollar amount set forth in clause (i) of the preceding paragraph shall be actuarially reduced in accordance with Treas. Reg. §
1.415(b)-1(d) if pension benefits commence prior to the Participant’s attainment of age 62. If a Participant’s pension benefit payments commence after the Participant’s attainment of age 65, such dollar amount shall be actuarially
increased in accordance with Treas. Reg. § 1.415(b)-1(e). 
 A Participant’s “annual benefit” shall mean the
Participant’s accrued benefit payable annually in the form of a straight life annuity, as determined in, and accordance with, Treas. Reg. § 1.415(b)-1(b). If the annual benefit is payable in a form other than a single life annuity, the
annual benefit shall be adjusted to the Actuarial Equivalent of a single life annuity using the assumptions of the following sentences; provided, however, that no adjustment shall be required for survivor benefits payable to a
surviving Spouse under a Qualified Joint and Survivor Annuity (as described in Section 5.2) to the extent such benefits would not be payable if the Participant’s annual benefit were paid in another form. 

Effective for Plan Years beginning January 1, 2004 and January 1, 2005, for any form of benefit subject to Section 417(e)(3) of
the Code, a Participant’s annual benefit shall be the greater of (i) the amount computed using the interest rate and mortality table used to determine actuarial equivalence under the Plan and (ii) the amount computed using an interest
rate assumption of 5.5% and the applicable mortality table under Treas. Reg. § 1.417(e)-1(d)(2) (the “Applicable Mortality Table”). Effective for Plan Years beginning on or after January 1, 2006, for any form of benefit subject
to Section 417(e)(3) of the Code, a Participant’s annual benefit shall be the greatest of (i) the amount computed using the interest rate and mortality table used to determine actuarial equivalence under the Plan, (ii) the amount
computed using an interest rate assumption of 5.5% and the Applicable Mortality Table and (iii) the amount computed using the applicable interest rate under Treas. Reg. § 1.417(e)-1(d)(3) and the Applicable Mortality Table, divided by
1.05. Effective for Plan Years beginning on or after January 1, 2006, for any form of benefit not subject to Section 417(e)(3) of the Code, a Participant’s annual benefit shall be determined in accordance with Treas. Reg. §
1.415(b)-1(c). An individual’s “annual benefit” under any other defined benefit plan maintained by the Employer and Affiliate shall be as determined pursuant to the provisions of Section 415 of the Code and the regulations issued
thereunder the terms of such plan. 

  
 23 

 Notwithstanding the foregoing provisions of this Section, the limitation provided by this Section
shall not apply to a Participant who has not at any time participated in a defined contribution plan maintained by any Employer and whose annual benefit under the Plan does not exceed $10,000 multiplied by a fraction (not exceeding 1 and not less
than 1/10th) the numerator of which is the Participant’s years of service (within the meaning of Treas. Reg. § 1.415(b)-1(g)(2)(ii)) and the denominator of which is 10. 

For purposes of this Section, the term “compensation” shall have the meaning set forth in Section 415(c)(3) of the Code and the
applicable Regulations, the term “defined contribution plan” shall have the meaning set forth in Treas. Reg. § 1.415(c)-1(a)(2), the term “defined benefit plan” shall have the meaning set forth in Treas. Reg. §
1.415(b)-1(a)(2) and the term “Employer” shall include the Employers and all corporations and entities required to be aggregated with any of the Employers pursuant to Section 414(b) and (c) of the Code as modified by
Section 415(h) of the Code. Section 415 of the Code and the Regulations thereunder are hereby incorporated by reference. 
 4.7
Benefit Commencement Date. Unless the Participant elects otherwise, the pension to which he is entitled under this Article IV or Articles IVA or IVB shall begin within sixty days of the close of the Plan Year in which falls the later of his Normal
Retirement Date or his Separation from Service. The failure of the Participant to apply for his benefit pursuant to Section 5.9 by the date prescribed in the preceding sentence shall be deemed an election to defer payment to a later date.
Notwithstanding the above, payment of such pension shall begin no later than a Participant’s Required Beginning Date, or the first day of the month following the date the Participant first becomes entitled to such pension, if later. 

4.8 Post-Retirement Adjustment. 

(a) Commencing with installments due September 1, 1978, benefit payments to Participants who retired under Sections 4.1,
4.2 or 4.3, or corresponding prior Sections, prior to January 1, 1978 and their Contingent Annuity Option beneficiaries are increased by 2% for each calendar year of retirement to a maximum of 4%. 

(b) Commencing with installments due September 1, 1980, benefit payments to Participants who retired under the foregoing
provisions of the Plan prior to January 1, 1980 and their Contingent Annuity Option beneficiaries are increased by 3% for each calendar year of retirement to a maximum of 6%. 

(c) Commencing with installments due September 1, 1982, benefit payments to Participants who retired under the foregoing
provisions of the Plan prior to January 1, 1982 and their Contingent Annuity Option beneficiaries are increased by 3% for each calendar year of retirement to a maximum of 6%. 

(d) Commencing with installments due September 1, 1984, benefit payments to Participants who retired under the foregoing
provisions of the Plan prior to January 1, 1984, and their Contingent Annuity Option beneficiaries are increased by 2% for each calendar year of retirement to a maximum of 4%. 

  
 24 

 (e) Commencing with installments due September 1, 1986, benefit payments to
Participants who retired under the foregoing provisions of the Plan prior to January 1, 1986, and their Contingent Annuity Option beneficiaries are increased by 2% for each calendar year of retirement to a maximum of 4%. 

(f) Commencing with installments due February 1, 1991, benefit payments to: 

(1) Participants who retired under Section 4.1, 4.2 or 4.3 of the Plan (or corresponding prior Sections) prior to
January 1, 1990; 
 (2) Contingent Annuity Option beneficiaries of deceased Participants who died or retired under the
foregoing provisions prior to January 1, 1990; 
 (3) Qualified Joint and Survivor Annuity beneficiaries of deceased
Participants who retired under the foregoing provisions prior to January 1, 1990; and 
 (4) surviving Spouses receiving
benefits under Section 5.4 due to the death of a Participant while an Active Participant prior to January 1, 1990, are increased by a factor of 3/4 of 1% multiplied by the difference obtained by subtracting the Participant’s year of
retirement or death, as appropriate, from 1990. A Participant or beneficiary described in this Paragraph (f) may irrevocably elect to waive this increase in benefit payments by written notice to the Company made no later than 60 days after the
Participant or beneficiary is first notified of the increase by the Company. 
 (g) Commencing with installments due
February 1, 1997, benefit payments to Participants who retired under the foregoing provisions of the Plan prior to January 1, 1994, and Contingent Annuity Option beneficiaries of deceased Participants who died or retired under the
foregoing provisions of the Plan prior to January 1, 1994, are increased by fifty dollars ($50) per month. 
 (h)
Commencing with installments due January 1, 2000, benefit payments to Participants who retired under the foregoing provisions of the Plan prior to January 1, 1994, and Contingent Annuity Option beneficiaries of deceased Participants who
died or retired under the foregoing provisions of the Plan prior to January 1, 1994, are increased by fifty dollars ($50) per month. 

4.9 Special Early Retirement Benefit. The annuity (and any Contingent Annuity Option benefit) of a Participant who retires under the early
retirement provisions of Section 4.3 between February 1, 1978 and June 1, 1978, inclusive, shall be computed without the 4% per year reduction described in the last sentence of Section 4.3. In addition, the monthly benefit
paid to such a Participant (but not the benefit to any Contingent Annuity Option beneficiary) shall be supplemented by a monthly payment equal to the Social Security old age insurance benefit to which the Participant would be entitled at Age 65
based on earnings received as an Employee of the Company, assuming he has no wages for Social Security purposes after his retirement and there is no change in the Social Security law or rates subsequent to his retirement. The supplemental benefit
described in the preceding sentence shall end with the payment on the first day of the month preceding the month in which the Participant first receives (or could have 

  
 25 

 
received if he had applied) Social Security old age insurance benefits unreduced on account of age, or with the payment last preceding the Participant’s death, if earlier. The special
benefits described in this Section shall also be paid with respect to a Participant who elects early retirement during the period February 1, 1978 through June 1, 1978, inclusive, but whose actual retirement is postponed at the request of
the Company in order to provide for personnel replacement and training. 
 4.10 Minimum Annuity. The annuity of a Participant who retires or
has retired under Sections 4.1, 4.2 or 4.3, or corresponding prior Sections regardless of the form of his benefit under Article V, and who is not at any time a Highly Compensated Employee, shall not be less than $150 per month. 

4.11 Suspension of Benefits. With respect to any Participant whose employment by the Company or an Affiliate continues past his Normal
Retirement Date, or who is receiving benefits under the Plan and again becomes an Employee, the following rules shall apply: 

(a) If the reemployed Participant has not reached his Normal Retirement Date, his pension shall be suspended and recomputed
under the Plan upon his subsequent Separation from Service. 
 (b) If the Participant has reached his Normal Retirement Date,
for each calendar month or for each four or five week payroll period ending in a calendar month during which the Participant either completes forty or more Hours of Service (counting each day of Employment as five Hours of Service), or receives
payment for any such Hours of Service performed on each of eight or more days or separate work shifts in such month or payroll period, (referred to herein as “Suspension Service”) no pension payment shall be made, and no adjustment to the
Participant’s pension shall be made on account of such non-payment. No payment shall be withheld pursuant to this Paragraph (b) until the Employee is notified by personal delivery or first class mail during the first calendar month or
payroll period in which payments are suspended that his benefits are suspended. Such notification shall contain a description of the specific reasons why benefit payments are being suspended, a general description of the Plan provisions relating to
the suspension of payments and a copy of such provisions (or a reference to the relevant pages of the summary plan description providing such information), and a statement to the effect that applicable Department of Labor Regulations may be found in
Section 2530.203-3 of the Code of Federal Regulations. In addition, the suspension notification shall inform the Employee of the Plan’s procedure for affording a review of the suspension of benefits. 

(c) The pension of a reemployed Participant whose benefits were suspended under this Section 4.11 shall begin again no
later than the earlier of (1) the first day of the third month following the month in which the Participant first fails to satisfy the service requirements described in Paragraph (b) or has a Separation from Service or (2) his
Required Beginning Date. The resumed pension shall be recalculated to reflect Compensation, average annual base salary and Benefit Years earned under the Plan as in effect during such period of reemployment and shall be reduced by the

  
 26 

 
Actuarial Equivalent of any payment received by the Employee under the Plan prior to his Normal Retirement Date; provided, however, that in no event shall the Participant’s monthly pension
payable in the form of a single life annuity when reemployment ends be less than the monthly pension that was payable to the Participant in the form of a single life annuity prior to his period of reemployment. The full amount of the resumed pension
shall be paid in the form determined pursuant to Article V at the time payments are resumed, without regard to the form of payment in effect for the Participant prior to his reemployment. The pension of any Participant whose employment continued
past his Normal Retirement Date (and whose benefits are not suspended because of employment as described in Paragraph (b)) shall be paid pursuant to Section 4.2. 

(d) Notwithstanding the foregoing provisions of this Section 4.11, a Participant who received a pension while the
Participant worked for Linden Chapel Corporation (formerly known as VSI Group, Inc., a Maryland corporation) before the assets of Linden Chapel Corporation (formerly known as VSI Group, Inc., a Maryland corporation) were acquired by EIS or its
Affiliate, shall not have his pension suspended under this Section 4.11 solely as a result of the acquisition of the assets of Linden Chapel Corporation (formerly known as VSI Group, Inc., a Maryland corporation) by EIS or its Affiliate, so
long as the Participant remains continuously employed thereafter by the Company or an Affiliate. Notwithstanding the foregoing provisions of this Section 4.11, this Section 4.11 shall not apply to a Participant who is reemployed by an
Affiliated Company that does not maintain a defined benefit pension plan. 
 (e) Notwithstanding the foregoing provisions of
this Section 4.11, a reemployed Participant who is employed under circumstances that satisfy the applicable conditions for continuation of payment of retirement benefits set forth in the Company’s policy regarding the rehiring of retirees
shall not have his pension suspended under this Section 4.11 nor shall such reemployed Participant be prohibited from commencing his pension if he is otherwise eligible to commence such pension. 

4.12. Benefit Restrictions as a Result of Funding. (a) Notwithstanding any provision of the Plan to the contrary, the following benefit
restrictions shall apply if the Plan’s “Adjusted Funding Target Attainment Percentage” (the “AFTAP”), as defined in Section 436(j) of the Code, is at or below the following levels. 

(i) If the Plan’s AFTAP is 60% or greater but less than 80% for a Plan Year, the Plan shall not pay any prohibited payment
(as defined in Section 4.12(a)(iv)) after the valuation date for the Plan Year to the extent the amount of the payment exceeds the lesser of (x) 50% of the amount of the payment which could be made without regard to the restrictions under
this subsection 4.13 and (y) the present value (determined pursuant to guidance prescribed by the Pension Benefit Guaranty Corporation, using the interest and mortality assumptions under Section 417(e) of the Code) of the maximum guarantee
with respect to the Participant under Section 4022 of ERISA. Notwithstanding the preceding sentence, only one such prohibited payment may be made with respect to any Participant during any period of consecutive Plan Years to which the
limitations under either clause (x) or (y) of the preceding sentence apply. For purposes of this Section 4.12(a)(i), a Participant, his beneficiary and any alternate payee (as defined in Section 414(p)(8) of the Code) shall be
deemed a single “Participant.” 

  
 27 

 (ii) If the Plan’s AFTAP is less than 60% for a Plan Year, the Plan shall
not pay any prohibited payment after the valuation date for the Plan Year. 
 (iii) During any period in which the Company is
a debtor in a case under Title 11, United States Code (or similar federal or state law), the Plan shall not make any prohibited payment. The preceding sentence shall not apply on or after the date on which the Plan’s enrolled actuary certifies
that the AFTAP is not less than 100%. 
 (iv) For purposes of this Section 4.12(a), the term “prohibited
payment” means (x) any payment, in excess of the monthly amount paid under a single life annuity (plus any social security supplements described in the last sentence of Section 411(a)(9) of the Code) to a Participant or beneficiary
whose annuity starting date (as defined in Section 417(f)(2) of the Code and any regulations promulgated thereunder) occurs during any period a limitation under Section 4.12(a)(ii) or (iii) is in effect, (y) any payment for the
purchase of an irrevocable commitment from an insurer to pay benefits or (z) any other payment specified by the Secretary of the Treasury by regulations. 

(b) In any Plan Year in which the Plan’s AFTAP for such Plan Year is less than 60%, benefit accruals under the Plan shall
cease as of the valuation date for the Plan Year. This restriction shall cease to apply with respect to any Plan Year, effective as of the first day of the Plan Year, upon payment by the Company of a contribution (in addition to any minimum required
contribution under Section 430 of the Code) equal to the amount sufficient to result in an AFTAP of 60%. 
 (c) No
amendment which has the effect of increasing Plan liabilities by reason of increases in benefits, establishment of new benefits, changing the rate of benefit accruals or the rate at which benefits become nonforfeitable shall take effect during any
Plan Year if the Plan’s AFTAP for such Plan Year is less than 80% or would be less than 80% after taking into account such amendment; provided, however, that the preceding restriction shall not apply to an amendment which provides for an
increase in benefits under a formula which is not based on a Participant’s compensation if the rate of such increase is not in excess of the contemporaneous rate of increase in average wages of Participants covered by the amendment; and
provided, further, that such restriction shall cease to apply with respect to any Plan Year, effective as of the first day of the Plan Year (or if later, the effective date of the amendment), upon payment by the Company of a contribution as
described in Section 436(c)(2) of the Code. 

  
 28 

 (d) The Plan shall not provide an unpredictable contingent event benefit payable
with respect to any event occurring during any Plan Year if the AFTAP for such Plan Year is less than 60% or would be less than 60% after taking into account such occurrence; provided, however, such restriction shall cease to apply with respect to
any Plan Year, effective as of the first day of the Plan Year, upon payment by the Company of a contribution as described in Section 436(b)(2) of the Code. For purposes of this Section 4.12(d), the term “unpredictable contingent event
benefit” means any benefit payable solely by reason of a plant shutdown (or similar event, as determined by the Secretary of the Treasury), or any event other than the attainment of any age, performance of any service, receipt or derivation of
any compensation, or occurrence of death or disability. 
 (e) To avoid benefit restrictions, the Company may take any action
permitted by Section 436 of the Code and the regulations promulgated thereunder. 
 (f) The provisions of this
Section 4.12 are intended to comply with Section 436 of the Code and any regulations promulgated thereunder, and shall be construed to comply therewith. 

4.13. Participant’s Death During Qualified Military Service. Effective January 1, 2007, in the case of a Participant who dies while
performing Qualified Military Service, the Beneficiaries of such Participant shall be entitled to any additional benefits, if any (other than benefit accruals relating to the period of Qualified Military Service), provided under the Plan had the
Participant resumed employment with an Employer and then terminated such employment on account of such Participant’s death. 
 ARTICLE IVA. Special
Limited Duration Early Retirement Benefit. 
 4A.1 Eligibility. 

(a) The special limited duration early retirement benefit described in Section 4A.3 shall be available to any Active
Participant who: 
 (1) as of December 31, 1990, has attained Age 50 and has to his credit at least five Benefit Years;
and 
 (2) makes a Special Early Retirement Election in accordance with the provisions of Section 4A.2 and does not
withdraw such Election on or before September 15, 1990 as provided in Section 4A.2(b). 
 (b) The Accrued Benefit
of an Active Participant who satisfies the requirements of Paragraph (a)(1) above and who dies after July 14, 1990, but before September 16, 1990, shall be calculated under Section 4A.3 as of the date of his death for purposes of
determining any death benefit payable on behalf of the Participant pursuant to Section 5.3 or 5.4, notwithstanding his failure to satisfy the requirement of Paragraph (a)(2) above. 

  
 29 

 4A.2 Special Early Retirement Election. 

(a) for the purposes of this Article, a “Special Early Retirement Election” is a written election that: 

(1) is submitted to the Plan Administrator on or after July 15, 1990 and on or before September 15, 1990; and 

(2) that indicates the Active Participant’s intent to retire from employment with the Company: 

(A) if the Active Participant elects to participate in the Company’s Service Completion Plan, on his “Service
Completion Date” (as defined in Section 4A.4(c)(2) below); or 
 (B) if the Active Participant does not elect to
participate in the Company’s Service Completion Plan, on August 1, 1990, September 1, 1990, or October 1, 1990; 

provided, however, that the election described in Section 4A.2(a)(2)(A) shall not be available to an Active Participant described in
Section 4A.4(c)(1)(B). 
 (b) An Active Participant’s Special Early Retirement Election shall become irrevocable as
of September 15, 1990 if it has not been withdrawn by the Active Participant on or before such date. 
 4A.3 Benefits. Notwithstanding
anything to the contrary contained in the Plan, each Active Participant who satisfies the requirements of Section 4A.1 shall be entitled to retire on the following terms: 

(a) (1) Notwithstanding the provisions of Section 3.1, each Active Participant who satisfies the requirements of
Section 4A.1 shall have an Accrued Benefit equal to one-twelfth of the greater of: 
 (A) the sum of (i) 2% of his
average annual Compensation during the period of his service, if any, between January 1, 1930 and December 31, 1938, inclusive, multiplied by his Benefit Years before January 1, 1939, and (ii) 2% of his aggregate Compensation for
employment after December 31, 1938, or 
 (B) the sum of (i) a percentage of his average annual base salary during
his 60 consecutive months of employment with the Company that yield the highest twelve month average equal to 5%, plus 1.2% multiplied by the sum of five plus his number of Benefit Years determined as of his Separation from Service (to a maximum of
45), and (ii) 0.35% of such highest average annual base salary in excess of Covered Compensation as of the date of reference, multiplied by his Benefit Years (up to a maximum of 14%); 

  
 30 

 (2) Notwithstanding the above, the Accrued Benefit of an Active Participant who
satisfies the requirements of Section 4A.1 shall not exceed the maximum amount permissible under Sections 401(l) and 415 of the Code when such limitations are applied as follows: 

(A) The limitations of Sections 401(l) and 415 shall be applied in the following order of priority: (I) prior to
August 3, 1992, the ten-year phase-in limitation applicable to changes in the benefit structure under Section 415(b)(1)(5)(D) of the Code; (II) the limitations on the maximum excess allowance applicable when unreduced benefits are payable
prior to social security retirement age as described under Section 401(l)(5)(F)(i) of the Code; and (III) the limitation described in Section 415(b)(1) of the Code; 

(B) The ten-year phase-in limitation described in Subsection (A)(I) above shall apply to changes in benefits resulting from
the crediting of five additional Benefit Years under Section 4A.3(a)(1)(B)(I); provided, however, that such limitation shall cease to apply on and after August 3, 1992; 

(C) The limitations on the maximum excess allowance described in Subsection (A)(II) above shall apply only to such
Participants who are Highly Compensated Employees at any time after 1989 and prior to Separation from Service; and 
 (D)
For purposes of the limitations described in Subsections (A)(I) and (A)(III) above, the following actuarial assumptions shall be used to determine adjusted limitations for Participants whose benefit payments commence prior to Age 55: (I) 5%
interest; and (II) the 1971 Forecast Mortality Table with a one-year age rating. 
 (3) For the purposes of
Section 4A.3(a)(1)(B) above: 
 (A) employment during the most recent five years shall include absences which are
included in Employment, except an absence during which an Employee receives benefits under the Company’s Disabilitant Plan, and the average annual base salary of an Employee on an included absence shall be calculated as if his base salary
continued during any period of such absence for which he did not receive Compensation, such salary to be that in effect when such period began, adjusted for increases applicable to his job classification which occur prior to the end of such period;

 (B) for any 12-consecutive-month period taken into account in determining a Participant’s average annual base
salary, a Participant’s annual base salary shall not exceed $200,000 (or such other amount as may apply under Section 401(a)(17) of the Code for the calendar year in which the last of such 12-consecutive-month periods ends.) In determining
annual base salary, the family aggregation rules of Section 401(a)(17)(A) of the Code, as in effect prior to January 1, 1997, shall apply. 

(C) a Participant’s annual base salary shall not include any lump sum payment of accrued vacation or sick pay, nor any
severance payment made by the Company or an Affiliate or pursuant to any plan maintained by the Company or an Affiliate. 

  
 31 

 (b) for the purposes of determining the date as of which the Active Participant
may commence receiving his pension pursuant to Article IV, and his ability to elect a Contingent Annuity Option pursuant to Section 5.3, the Active Participant: 

(1) shall be credited with his actual number of Vesting Years as of his Separation from Service, plus five Vesting Years; and

 (2) shall be deemed to be his actual Age as of the later of his Separation from Service or December 31, 1990, plus
five years; provided, however, that the Actuarial Equivalent of his Accrued Benefit shall be calculated based on his actual Age as of his Benefit Commencement Date. 

(c) If the Participant’s annuity (including any Contingent Annuity Option benefit) is paid pursuant to Section 4.3,
such annuity shall be computed without regard to the 4% per year reduction described in the last sentence of such Section. 
 4A.4
Special Rules. Notwithstanding anything to the contrary contained in the Plan: 
 (a) The minimum pension payable to an
Active Participant who makes a Special Early Retirement Election shall be equal to the pension otherwise payable to him under the Plan, determined without regard to the provisions of this Article IVA (other than the limitations described in
Section 4A.3(a)(2)), multiplied by one hundred five percent (105%). 
 (b) If, at the time of making a Special Early
Retirement Election under Section 4A.2, an Active Participant elects any Contingent Annuity Option, the election of such option shall become effective immediately. 

(c) The following additional definitions shall apply for purposes of this Article IVA: 

(1) An “Active Participant” shall mean an Active Participant as defined in Section 1.2, including (A) a
Participant who is an Eligible Employee at least one day on or after July 15, 1990 and on or before September 15, 1990 and (B) a Participant not described in (A) who is absent from Employment by reason of his Disabilitant on
account of illness or accident. 
 (2) An Active Participant’s “Service Completion Date” shall be the date
specified by the Company as the date as of which his services will no longer be required by the Company. In no event, however, will any Active Participant’s Service Completion Date be later than December 1, 1992. Each Active Participant
who makes a Special Early Retirement Election shall receive written notification from the Company on or before December 1, 1990 specifying the calendar quarter in which or the date on which his services will no longer be required by the
Company. 

  
 32 

 ARTICLE IVB. Nuclear Voluntary Retirement Incentive Plan. 

4B.1 Eligibility. 

(a) The voluntary retirement incentive plan benefit described in Section 4B.3 shall be available to any Participant who:

 (1) as of December 1, 1992 is on the Nuclear Group payroll; 

(2) as of March 31, 1993, will have attained Age 50 and have to his credit at least 5 Benefit Years; and 

(3) makes a Voluntary Early Retirement Election in accordance with the provisions of Section 4B.2 and does not withdraw
such Election as provided in Section 4B.2(b). 
 (b) The Accrued Benefit of a Participant who satisfies the requirements
of Paragraphs (a)(1) and (2) above and who dies after December 9, 1992, but before January 26, 1993, shall be calculated under Section 4B.3 as of the date of his death for purposes of determining any death benefit payable on
behalf of the Participant pursuant to Section 5.3 or 5.4, notwithstanding his failure to satisfy the requirement of Paragraph (a)(3) above. 

4B.2 Voluntary Early Retirement Election. 

(a) For the purposes of this Article, a “Voluntary Early Retirement Election” is a written election that: 

(1) is submitted to the Plan Administrator on or after December 10, 1992 and on or before January 25, 1993, together
with a signed full waiver and release of claims form; and 
 (2) indicates the Participant’s intent to retire from
employment with the Company on March 1, 1993, May 1, 1993 or July 1, 1993, as prescribed for the Participant in the personal election form provided to the Participant by the Company. 

(b) A Participant’s Voluntary Early Retirement Election shall become irrevocable if it is not withdrawn by the
Participant, in writing in a form acceptable to the Plan Administrator, within seven (7) days following the date such Voluntary Early Retirement Election is submitted to the Administrator by the Participant. 

4B.3 Benefits. Notwithstanding anything to the contrary contained in the Plan, each Participant who satisfies the requirements of
Section 4B.1 shall be entitled to retire on the following terms: 
 (a) (1) Notwithstanding the provisions of
Section 3.1 (other than the last sentence of Section 3.1(b)), each Participant who satisfies the requirements of Section 4B.1 shall have an Accrued Benefit equal to one-twelfth of the greater of: 

(A) the sum of (I) 2% of his average annual Compensation during the period of his service, if any, between
January 1, 1930 and December 31, 1938, inclusive, multiplied by his Benefit Years before January 1, 1939, and (II) 2% of his aggregate Compensation for employment after December 31, 1938, or 

  
 33 

 (B) the sum of (I) a percentage of his average annual base salary during
his 60 consecutive months of employment with the Company that yield the highest twelve month average equal to 5%, plus 1.2% multiplied by the sum of five plus his number of Benefit Years determined as of his Separation from Service (to a maximum of
45 Benefit Years), and (II) 0.35% of such highest average annual base salary in excess of Covered Compensation as of the date of reference, multiplied by his Benefit Years (up to a maximum of 14%); 

(2) Notwithstanding the above, the Accrued Benefit of a Participant who satisfies the requirements of Section 4B.1 shall
not exceed the maximum amount permissible under Sections 401(l) and 415 of the Code when such limitations are applied as follows: 

(A) The limitations of Sections 401(l) and 415 shall be applied in the following order of priority: (I) the limitations
on the maximum excess allowance applicable when unreduced benefits are payable prior to social security retirement age as described under Section 401(l)(5)(F)(i) of the Code; and (II) the limitation described in Section 415(b)(1) of the
Code; 
 (B) The limitations on the maximum excess allowance described in Subparagraph (A)(I) above shall apply only to such
Participants who are Highly Compensated Employees at any time after 1991 and prior to Separation from Service; and 
 (C)
For purposes of the limitation described in Subparagraph (A)(II) above, the following actuarial assumptions shall be used to determine the adjusted limitation for Participants whose benefit payments commence prior to Age 62: (I) 5% interest;
and (II) the 1971 Forecast Mortality Table with a one-year age rating. 
 (3) For purposes of Section 4B.3(a)(1) above,
for any 12-consecutive-month period taken into account in determining a Participant’s average annual base salary, a Participant’s annual base salary shall not exceed $200,000 (or such other amount as may apply under Section 401(a)(17)
of the Code for the calendar year in which the last of such 12-consecutive-month periods ends). In determining annual base salary, the family aggregation rules of Section 401(a)(17)(A) of the Code, as in effect prior to January 1, 1997,
shall apply. 
 (b) For the purposes of determining the date as of which the Participant may commence receiving his pension
pursuant to Article IV, and his ability to elect a Contingent Annuity Option pursuant to Section 5.3, the Participant: 

(1) shall be credited with his actual number of Vesting Years as of his Separation from Service, plus 5 Vesting Years; and 

  
 34 

 (2) shall be deemed to be his actual Age as of the later of his Separation from
Service or March 31, 1993, plus 5 years; provided, however, that the Actuarial Equivalent of his Accrued Benefit shall be calculated based on his actual Age as of his Benefit Commencement Date. 

(c) If the Participant’s annuity (including any Contingent Annuity Option benefit) is paid pursuant to Section 4.3,
such annuity shall be computed without regard to the 4% per year reduction described in the last sentence of such Section. 
 4B.4
Special Rules. Notwithstanding anything to the contrary contained in the Plan, if, at the time of making a Voluntary Early Retirement Election under Section 4B.2, a Participant elects any Contingent Annuity Option, the election of such option
shall become effective immediately. 
 ARTICLE IVC. Voluntary Retirement Incentive Program. 

4C.1 Eligibility. 

(a) The voluntary retirement incentive program benefit described in Section 4C.3 shall be available to any Participant
who: 
 (1) is an Eligible Employee employed on a regular, part-time or intermittent basis, whether actively employed or
absent under circumstances included in Employment, during the period beginning on July 5, 1994 and ending on September 16, 1994, other than an Eligible Employee who is laid off due to loss of employment qualifications and whose recall
period ends prior to the date described for the Eligible Employee in Section 4C.2(a)(2); 
 (2) was born before
January 1, 1946, became an Eligible Employee before January 1, 1991, and, as of December 31, 1995, will have to his credit at least 5 Benefit Years; 

(3) makes a Voluntary Early Retirement Election in accordance with the provisions of Section 4C.2 and does not withdraw
such Election as provided in Section 4C.2(b); and 
 (4) continues in employment with the Company in the same position
(unless transferred at the direction of the Company) until, but not beyond, the date described in Section 4C.2(a)(2); provided, however, that this requirement shall not apply in the event the Participant ceases active employment with the
Company (which shall apply to both direct and indirect employment (e.g., a leased employee)) earlier (A) due to a Disabilitant on account of illness or accident during which the Participant is eligible for and receives Disabilitant benefits
under a Disabilitant benefit plan sponsored by the Company; (B) because the Company declares the Participant excess before the date described for the Participant in Section 4C.2(a)(2); or (C) because the Company has discharged the
Participant for any reason, other than for willful misconduct, on or after July 5, 1994. 

  
 35 

 (b) (1) The Accrued Benefit of a Participant who satisfies the requirements of
Paragraphs (a)(1) and (a)(2) above and who dies after July 4, 1994, but before September 17, 1994, shall be calculated under Section 4C.3 as of the date of his death for purposes of determining any death benefit payable on behalf of
the Participant pursuant to Section 5.3 (but not Section 5.4), notwithstanding his failure to satisfy the requirements of Paragraph (a)(3) and/or (a)(4) above. 

(2) The Accrued Benefit of a Participant who satisfies the requirements of Paragraphs (a)(1), (a)(2) and (a)(3) above and who
dies after July 4, 1994, but before the date described for the Participant in Section 4C.2(a)(2), shall be calculated under Section 4C.3 as of the date of his death for purposes of determining any death benefit payable on behalf of
the Participant pursuant to Section 5.3 or 5.4, notwithstanding his failure to satisfy the requirements of Paragraph (a)(4) above. 

4C.2 Voluntary Early Retirement Election. 

(a) For the purposes of this Article, a “Voluntary Early Retirement Election” is a written election that: 

(1) is submitted to and accepted by the Plan Administrator on or after July 5, 1994 and on or before September 16,
1994, together with a signed full waiver and release of claims form; and 
 (2) indicates the Participant’s intent to
retire from employment with the Company (including both direct and indirect employment (e.g., as a leased employee)) on the first of the month following the later of (A) the Participant’s release date determined from the table below or
(B) the date the Participant attains Age 50. 
  

			
	 STRATEGIC BUSINESS UNIT
	  	 RELEASE DATE

	CONSUMER ENERGY SERVICE GROUP	  	
		
	 •    Majority (except below
	  	 •    12/31/94

		
	 •    Gas Utilization Job Family
	  	 •    3/31/95

		
	NUCLEAR	  	
		
	 •    Majority (except below)
	  	 •    12/31/94

		
	 •    Limerick (other than below)

•       Operations

•       Mtce/I&C
	  	 •    12/31/94

6/30/95

6/30/95

  
 36 

			
	 STRATEGIC BUSINESS UNIT
	  	 RELEASE DATE

	 •    Station Support (other than below)

•       Mtce/I&C
	  	 •    12/31/94

6/30/95

		
	 •    Peach Bottom (other than below

•       Operations

•       Mtce/I&C
	  	 •    12/31/94

12/31/95

12/31/95

		
	POWER GENERATION GROUP	  	
		
	 •    Majority (except below)
	  	 •    12/31/94

		
	 •    Operations – Cromby Station
	  	 •    6/30/95

		
	CENTRAL	  	
		
	 •    Information Systems
	  	 •    10/31/94

		
	 •    Human Resources-

Benefits Division
	  	 •    12/31/94

6/30/95

	 •    Corp. & Public Affairs
	  	 •    12/31/94

	 •    Quality Management
	  	 •    12/31/94

	 •    Finance
	  	 •    12/31/94

	 •    Legal
	  	 •    12/31/94

	 •    Support Services
	  	 •    12/31/94

	 •    Gas “Meter Shop”
	  	 •    12/31/94

	 •    Gas
	  	 •    6/30/95

	 •    Bulk
	  	 •    6/30/95

 (b) A Participant’s Voluntary Early Retirement Election shall become irrevocable if it is
not withdrawn by the Participant, in writing in a form acceptable to the Plan Administrator: 
 (1) within seven
(7) days following the date such Voluntary Early Retirement Election is submitted to the Administrator by the Participant, in the case of Elections submitted to the Administrator before September 2, 1994; or 

(2) within seven (7) days following the date such Voluntary Early Retirement Election is accepted by the Administrator, in
the case of Elections submitted to the Administrator on or after September 2, 1994. 

  
 37 

 4C.3 Benefits. Notwithstanding anything to the contrary contained in the Plan, each Participant
who satisfies the requirements of Section 4C.1 shall be entitled to retire on the following terms: 
 (a) (1)
Notwithstanding the provisions of Section 3.1 (other than the last sentence of Section 3.1(b)), each Participant who satisfies the requirements of Section 4C.1 shall have an Accrued Benefit equal to one-twelfth of the greater of: 

(A) the sum of (I) 2% of his average annual Compensation during the period of his service, if any, between
January 1, 1930 and December 31, 1938, inclusive, multiplied by his Benefit Years before January 1, 1939, and (II) 2% of his aggregate Compensation for employment after December 31, 1938, or 

(B) the sum of (I) a percentage of his average annual base salary during his 60 consecutive months of employment with the
Company that yield the highest twelve month average equal to 5%, plus 1.2% multiplied by the sum of three plus his number of Benefit Years determined as of his Separation from Service (to a maximum of 43 Benefit Years), and (II) 0.35% of such
highest average annual base salary in excess of Covered Compensation as of the date of reference, multiplied by his Benefit Years (up to a maximum of 14%); 

(2) Notwithstanding the above: 

(A) the Accrued Benefit of a Participant who satisfies the requirements of Section 4C.1 shall not exceed the maximum
amount permissible under Section 415 of the Code. For purposes of this limitation, the following actuarial assumptions shall be used to determine the adjusted limitation under Section 415(b)(1) of the Code for Participants whose benefit
payments commence prior to Age 62: (I) 5% interest; and (II) the 1971 Forecast Mortality Table with a one-year age rating. 

(B) Plan benefits provided under this Article IVC for Participants described in Section 4C.1 who are Highly Compensated
Employees at any time after 1993 shall be limited to the extent necessary to satisfy the nondiscriminatory amount requirements of Section 401(a)(4) of the Code applying the general test described in Treas. Reg. §1.401(a)(4)-3(c) to the
portion of the Plan covering Participants described in Section 4C.1. 
 (3) The Section 401(a)(17) Compensation
Limit described in Section 3.3 of the Plan shall apply for purposes of determining benefits under Section 4C.3(a)(1) above; provided, however, that a Participant’s Accrued Benefit shall in no event be less than the amount described in
Section 3.2(b). 

  
 38 

 (b) For purposes of determining the date as of which the Participant may commence
receiving his pension pursuant to Article IV, and his ability to elect a Contingent Annuity Option pursuant to Section 5.3, the Participant: 

(1) shall be deemed to have completed 10 Vesting Years for purposes of Article IV and shall be deemed to have completed 14
Benefit Years for purposes of Section 5.3; and 
 (2) shall be deemed to be his actual Age as of his Separation from
Service plus 5 years. 
 (c) If the Participant’s annuity (including any Contingent Annuity Option benefit) is paid
pursuant to Section 4.3, such annuity shall be computed without regard to the 4% per year reduction described in the last sentence of such Section. 

4C.4 Special Rules. Notwithstanding anything to the contrary contained in the Plan, if, at the time of making a Voluntary Early Retirement
Election under Section 4C.2, a Participant elects any Contingent Annuity Option, the election of such option shall become effective immediately. 

ARTICLE IVD. 1998 Workforce Reduction Program. 

4D.1 Purpose. This Article IVD is intended to provide certain Active Participants with additional benefits in recognition of the Company’s
need to reduce its workforce to address the competitive business conditions facing the Company and the Affiliates. In general, this Article IVD provides additional retirement benefits to Active Participants whose Employment with the Company
terminates between June 1, 1998 and June 30, 2000, inclusive, because they have been declared “excess” by the Company. 

4D.2 Definitions. The following capitalized terms, when used in this Article IVD, shall have the following meanings, notwithstanding any
different definitions of such terms elsewhere in the Plan. 
 (a) “CTAC Employee” means an Active Participant
employed by the Company in a craft, technical, administrative or clerical position. 
 (b) “Disabled Employee”
means an Active Participant who is receiving benefits pursuant to the Company’s Disabilitant Plan or Long Term Disabilitant Plan during the period from August 1, 1998, through June 30, 2000, inclusive. 

(c) “Election Period” means the 14-day period beginning on the date an Eligible Participant receives a Program
enrollment package. 
 (d) “Eligible Participant” means each PSM Employee, CTAC Employee or Disabled Employee who
satisfies the following applicable requirements: 
 (1) In the case of a Disabled Employee, he is described in Schedule 1 to
the Plan and terminates Employment on his Qualified Retirement Date or Qualified Separation Date, whichever is applicable, pursuant to his irrevocable written election to participate in the Program, which election shall be made in the form and
manner provided by the Company and during the applicable Election Period. 

  
 39 

 (2) In the case of a PSM Employee or a CTAC Employee, he continues in Employment
with the Company (or an Affiliate) in the same position (unless transferred at the direction of the Company) until, but not beyond, his Qualified Retirement Date or Qualified Separation Date, if any, whichever applies; provided, however, that this
requirement shall not apply in the event the PSM Employee or CTAC Employee ceases active employment with the Company (or an Affiliate) earlier due to a Disabilitant on account of illness or accident for which such Employee is eligible for and
receives Disabilitant benefits under a Disabilitant benefit plan sponsored by the Company. 
 (3) In the case of a PSM
Employee, he satisfies both (A) and (B), below: 
 (A) He is declared “excess” by the Company based on the
following criteria: 
 (i) his 1997 job performance; or 

(ii) the elimination of his position or a position in his job classification; or 

(iii) failure to be selected for an available position. 

(B) He does not reject an offer from the Company or an Affiliate to work in a position that is within two salary grades of his
current position. 
 A description of the PSM Employees who are declared “excess” by the Company in accordance with the foregoing criteria is set
forth on Schedule 1 to the Plan. 
 (4) In the case of a CTAC Employee, he satisfies both (A) and (B), below: 

(A) He is declared “excess” by the Company based on the following criteria: 

(i) his 1997 job performance; or 

(ii) the elimination of one or more positions in his job classification, and 

(I) if there are multiple positions that are identified as excess in his job classification and the number of such CTAC
Employees who elect to participate in the Program exceeds the number identified as excess, his seniority; or 
 (II) if
there are multiple positions that are identified as excess in his job classification and the number of such CTAC Employees who elect to participate in the Program is less than the number identified as excess, the criteria described in the
Company’s suspended Reduction in Force Policy. 

  
 40 

 A description of the CTAC Employees who are declared “excess” by the
Company in accordance with the foregoing criteria is set forth on Schedule 1 to the Plan. 
 (B) In the case of a CTAC
Employee described in subclause (iv)(A)(ii) above, either: 
 (i) he elects in writing, in the form and manner provided by
the Company and during the applicable Election Period, to participate in the Program and does not revoke such election within the time period prescribed by the Company; or 

(ii) he irrevocably elects in writing not to participate in the Program and the Company subsequently terminates his Employment
because he is declared “excess” in accordance with the criteria set forth in paragraph (4)(A) above; 
 (5)
His Employment, if any, is not terminated prior to his Qualified Retirement Date or Qualified Separation Date, if any, because of unsatisfactory job performance or one or more violations of the Company’s Disciplinary Guidelines or Code of
Conduct. 
 (6) He executes a written release and waiver of claims in favor of the Company and the Affiliates in a form
provided by the Company and within the time period required by the Company. Such release and waiver of claims shall become irrevocable if it is not withdrawn, in writing in a form acceptable to the Plan Administrator, within seven (7) calendar
days following its submission to the Plan Administrator. 
 (7) His Employment, or his Employer’s status as an
Affiliate, is not terminated as a result of a sale of assets or stock, a merger or any other business transaction which provides him an opportunity to be employed by an employer that is not the Company or an Affiliate. 

(e) “Program” refers to the enhanced benefits provided pursuant to this Article IVD. 

(f) “PSM Employee” means an Active Participant employed by the Company in a professional, supervisory or managerial
position. 
 (g) “Qualified Retirement Date” means the date between June 1, 1998 and June 30, 2000,
inclusive, as set forth on Schedule 1 of the Plan, that a Retirement-Eligible Participant may retire from the Company and receive Retirement Benefits. 

  
 41 

 (h) “Qualified Separation Date” means the date between June 1,
1998 and June 30, 2000, inclusive, as set forth on Schedule 1 of the Plan, that a Separation-Eligible Participant may terminate his Employment and receive Separation Benefits. 

(i) “Retirement Benefits” means the benefits described in Section 4D.4. 

(j) “Retirement-Eligible Participant” means an Eligible Participant who, as of December 31, 1999: 

(1) is Age 50 or older; and 

(2) is credited with at least five (5) Vesting Years. 

For purposes of this paragraph (j), the Age of an Eligible Participant shall be his actual Age (without regard to the provisions of Section 4D.4). 

(k) “SEP Annuity” means an annuity that is the Actuarial Equivalent of the SEP Lump Sum, determined on the basis of
the actuarial assumptions applicable under Section 5.6 of the Plan. 
 (l) “SEP Lump Sum” means a fixed dollar
amount equal to the following: 
 (1) in the case of a Separation-Eligible Participant who has not received payment for the
90-day search period under the Company’s Reduction in Force Policy prior to the suspension of that policy, a lump sum equal to the total amount such Separation-Eligible Participant would have received during the 90-day search period under the
Company’s suspended Reduction in Force Policy if such policy had remained in effect; and 
 (2) (A) for a
Separation-Eligible Participant who has fewer than ten (10) Benefit Years, two (2) multiplied by the number of full or partial Benefit Years as of his Separation from Service, multiplied by his Weekly Base Pay; or 

(B) for a Separation-Eligible Participant who has ten (10) or more Benefit Years, three (3) multiplied by the number
of full or partial Benefit Years as of his Separation from Service multiplied by his Weekly Base Pay. 
 Notwithstanding the
foregoing, no Separation-Eligible Participant shall be entitled to receive a SEP Lump Sum under clause (2)(A) above that is less than eight (8) multiplied by his Weekly Base Pay. 

(m) “Separation Benefits” means the benefits described in Section 4D.5. 

  
 42 

 (n) “Separation-Eligible Participant” means an Eligible Participant
who: 
 (1) is not a Retirement-Eligible Participant; or 

(2) is a Retirement-Eligible Participant who, in accordance with Section 4D.3, elects to receive Separation Benefits. 

(o) “Weekly Base Pay” means: 

(1) in the case of an Eligible Participant who was compensated on a salaried basis as of May 26, 1998, the Eligible
Participant’s weekly base salary as of May 26, 1998, adjusted for any subsequent merit increases (or for a pro rata portion of such merit increases if such increases are based on a greater regularly scheduled workweek than the Eligible
Participant’s regularly scheduled workweek as of May 26, 1998); 
 (2) in the case of an Eligible Participant who
was compensated on a non-salaried basis as of May 26, 1998, the number of hours per week such Eligible Participant was regularly scheduled to work as of May 26, 1998 multiplied by his regular hourly rate in effect on the day 

4D.3 Elections of the Retirement and Separation Benefits. Any Retirement-Eligible Participant shall be entitled to elect to receive Retirement
Benefits or Separation Benefits, but not both. A Retirement-Eligible Participant must submit to the Company’s Human Resources Department a completed and signed election form, in such form and manner and at such time as may be required by the
Administrator. 
 4D.4 Computation of Retirement Benefits Under the Program. 

(a) Each Retirement-Eligible Participant who has not elected Separation Benefits in accordance with Section 4D.3 shall be
entitled to early retirement benefits determined under Section 4.3 of the Plan, regardless of the number of Vesting Years with which he has been credited; provided, however, that for the purpose of determining any applicable reduction in the
amount received upon early retirement, such Participant’s Age on his Benefit Commencement Date shall be deemed to be his actual Age on such date plus 60 additional months. 

(b) The Accrued Benefit of a Retirement-Eligible Participant who satisfies the requirements of an Eligible Participant, other
than paragraphs 4D.2(d)(2) and 4D.2(d)(6), and who dies before his Qualified Retirement Date, shall be calculated by applying paragraph 4D.4(a) as of the date of his death for purposes of determining any death benefit payable on behalf of such
Participant pursuant to Sections 5.3 or 5.4, notwithstanding his failure to satisfy paragraphs 4D.2(d)(2) and/or 4D.2(d)(6). 
 4D.5
Computation, Payment and Form of Separation Benefits Under the Program. 
 (a) Each Separation-Eligible Participant shall be
entitled to receive a SEP Annuity in addition to his Accrued Benefit. 

  
 43 

 (b) A Separation-Eligible Participant shall receive payment of his SEP Annuity in
accordance with the following: 
 (1) A Separation-Eligible Participant shall receive the sum of (I) the Actuarial
Equivalent of his SEP Annuity in the form of a Single Life Annuity commencing on his Normal Retirement Date (determined on the basis of the actuarial assumptions applicable under Appendix A of the Plan) and (II) his Accrued Benefit, with such sum
payable at such time, in such form and subject to such adjustments as may otherwise be applicable under Articles IV and V of the Plan. In lieu of receiving such Actuarial Equivalent of his SEP Annuity at such time and in such form as he receives his
Accrued Benefit, a Separation-Eligible Participant may instead elect to receive immediate payment of his SEP Annuity in accordance with paragraph (2) below or an immediate distribution of his SEP Lump Sum in accordance with paragraph
(3) below. 
 (2) A Separation-Eligible Participant may elect, in accordance with the procedure described in
Section 4.3, to receive his SEP Annuity immediately, with payment to begin as of his Qualified Separation Date in the following form: 

(A) The SEP Annuity of a Separation-Eligible Participant who is unmarried on his Benefit Commencement Date shall be paid in
the form of a Single Life Annuity. 
 (B) The SEP Annuity of a Separation-Eligible Participant who is married on his Benefit
Commencement Date shall be paid in the form of a Qualified Joint and Survivor Annuity. 
 (3) In lieu of his SEP Annuity, a
Separation-Eligible Participant may elect to receive an immediate payment of his SEP Lump Sum, with payment to be made as of his Qualified Separation Date in a single sum. Any such election by a Separation-Eligible Participant who is married on his
Benefit Commencement Date shall be subject to the spousal consent requirements described in Section 5.7, shall be made in writing in a manner prescribed by the Company and may be made or revoked at any time within the 90-day period preceding
the Benefit Commencement Date but in no event earlier than the date on which the Participant receives the notice described in Section 5.5(a). 

(c) In the case of a Separation-Eligible Participant who satisfies the requirements of an Eligible Participant, other than
paragraphs 4D.2(d)(ii) and 4D.2(d)(vi), and who dies before his Qualified Separation Date, the Actuarial Equivalent of such Participant’s SEP Annuity in the form of a Single Life Annuity commencing on his Normal Retirement Date (determined on
the basis of the actuarial assumptions applicable under Appendix A of the Plan) shall be added to his Accrued Benefit for the purpose of determining any death benefit payable on behalf of such Participant pursuant to Sections 5.3 or 5.4,
notwithstanding his failure to satisfy paragraphs 4D.2(d)(ii) and/or 4D.2(d)(vi). 

  
 44 

 ARTICLE IVE. Merger Separation Program. 

4E.1 Purpose. This Article IVE is intended to provide certain Participants with additional benefits in recognition of the Company’s need
to reduce its workforce in connection with the merger of the Company and Unicom Corporation. In general, this Article IVE provides additional retirement benefits to certain Participants whose Employment with the Company terminates between 60 days
after the Merger Date and December 31, 2002, inclusive. 
 4E.2 Definitions. The following capitalized terms, when used in this Article
IVE, shall have the following meanings, notwithstanding any different definitions of such terms elsewhere in the Plan. 
 (a)
“Annuity” means an annuity that is the Actuarial Equivalent of the Lump Sum, determined on the basis of the actuarial assumptions applicable under Section 5.6 of the Plan. 

(b) “Disabled Employee” means an Active Participant who is receiving benefits pursuant to the Company’s
Disabilitant Plan or Long Term Disabilitant Plan at any time during the Merger Separation Period. 
 (c) “Election
Period” means the 45-day period beginning on the date an Eligible Participant receives a Program enrollment package. 

(d) “Eligible Participant” means each Participant, other than an intermittent employee, who satisfies the following
applicable requirements: 
 (1) In the case of a Disabled Employee, he terminates Employment on his Qualified Retirement Date
or Qualified Separation Date, whichever applies, pursuant to his irrevocable written election to participate in the Program, which election shall be made in the form and manner provided by the Company and during the applicable Election Period. 

(2) In the case of a Participant other than a Disabled Employee or a Participant described in (3) below, he satisfies
(A) or (B), and each of (C) and (D), below: 
 (A) His current position is eliminated as part of the restructuring
program related to the merger between the Company and Unicom Corporation; or 
 (B) He is offered a position or a transfer
(either between or within business units) as part of the merger between the Company and Unicom Corporation that results in one or more of the following: 

(i) an increase in one-way commuting distance of more than 50 miles; 

(ii) a substantial change in major position responsibilities and duties, as determined by the Company acting as employer and
not as a fiduciary; 

  
 45 

 (iii) a lower job band; or 

(iv) a lower annual base salary. 

(C) His position is identified by the Company for elimination, transfer or change, whichever applies, he is notified of such
elimination, transfer or change no later than sixty days before December 31, 2002 and, in the case of a transfer described in paragraph (2)(B) above, he elects in writing, in the form and manner provided by the Company and during the
Election Period, to participate in the Program. 
 (D) He continues in Employment with the Company or an Affiliate in the
same position (unless transferred at the direction of the Company) until, but not beyond, his Qualified Retirement Date or Qualified Separation Date, if any, whichever applies; provided, however, that this requirement shall not apply in the event
the Participant ceases active employment with the Company or an Affiliate earlier due to a disability on account of illness or accident which such Employee is eligible and receives disability benefits under a disability benefit plan sponsored by the
Company. 
 (3) In the case of an Active Participant who is a nonexempt, hourly craft employee, one or more positions in his
job classification are eliminated as part of the restructuring program related to the merger between the Company and Unicom Corporation, and 

(A) if there are multiple such positions that are eliminated in his job classification and the number of such Active
Participants who elect to participate in the Program exceeds the number of positions eliminated, Eligible Participants will be identified based on seniority; or 

(B) if there are multiple such positions that arc eliminated in his job classification and the number of such Active
Participants who elect to participate in the Program is less than the number of positions eliminated, Eligible Participants will be identified based on the criteria described in the Company’s suspended Reduction in Force Policy. 

(4) His Employment, if any, is not terminated prior to his Qualified Retirement Date or Qualified Separation Date, whichever
applies, for any reason not related to the merger between the Company and Unicom Corporation. 
 (5) He executes a written
release and waiver of claims in favor of the Company and the Affiliates in a form provided by the Company and within the time period required by the Company. Such release and waiver of claims shall become irrevocable if it is not withdrawn, in
writing in a form acceptable to the Plan Administrator, within seven (7) calendar days following its submission to the Plan Administrator. 

  
 46 

 (e) “Enhanced Age” means: 

(1) in the case of a Retirement-Eligible Participant, his actual Age plus twelve (12) additional months; and 

(2) in the case of a Separation-Eligible Participant, his actual Age plus the number of months included in his Special Payment
Period. 
 (f) “Enhanced Benefit Years” means: 

(1) in the case of a Retirement-Eligible Participant, his actual Benefit Years (up to a maximum of 40) plus twelve
(12) additional months; and 
 (2) in the case of a Separation-Eligible Participant, his actual Benefit Years (up to a
maximum of 40) plus the number of months equal to one-fourth of the number of weeks included in Section 4E.2(r)(2) (up to a maximum of twenty-four (24) weeks), rounded to the nearest whole number of months (with remainders of one-half(l/2)
rounded to the next higher whole number). 
 (g) “Enhanced Vesting Years” means: 

(1) in the case of a Retirement-Eligible Participant, his actual Vesting Years plus twelve (12) additional months; and

 (2) in the case of a Separation-Eligible Participant, his actual Vesting Years plus the number of months equal to
one-fourth of the number of weeks included in Section 4E.2(r)(2) (up to a maximum of twenty-four (24) weeks), rounded to the nearest whole number of months (with remainders of one-half (1/2) rounded to the next higher whole number).

 (h) “Lump Sum” means a fixed dollar amount equal to the following: 

(1) in the case of a Retirement-Eligible Participant, 26 multiplied by his Weekly Base Pay; and 

(2) in the case of a Separation-Eligible Participant, the sum of (A) and (B) below: 

(A) 52 multiplied by his Weekly Base Pay; and 

(B) the number of full Vesting Years as of his Qualified Separation Date that are in excess often (10) but not in excess
of thirty-six (36), if any, multiplied by his Weekly Base Pay. 
 (i) “Merger Separation Period” means the time
period beginning sixty (60) days before the Merger Date and ending on December 31, 2002, inclusive. 
 (j)
“Program” refers to the enhanced benefits provided pursuant to this Article IVE. 

  
 47 

 (k) “Qualified Retirement Date” means the date during the Merger
Separation Period. as determined by the Company, that a Retirement-Eligible Participant may retire from the Company and receive Retirement Benefits. 

(l) “Qualified Separation Date” means the date during the Merger Separation Period, as determined by the Company,
that a Separation-Eligible Participant may terminate his Employment and receive Separation Benefits. 
 (m) “Retirement
Benefits” means the benefits described in Section 4E.4. 
 (n) “Retirement-Eligible Participant” means an
Eligible Participant who: 
 (1) is at least Age 50 with five (5) or more Vesting Years as of his Qualified Retirement
Date; or 
 (2) satisfies the requirements of paragraph (1) above after taking into account his Enhanced Age and/or his
Enhanced Vesting Years. 
 (o) “Separation Benefits” means the benefits described in Section 4E.5. 

(p) “Separation-Eligible Participant” means an Eligible Participant who: 

(1) is not a Retirement-Eligible Participant; or 

(2) is a Retirement-Eligible Participant who, in accordance with Section 4E.3, elects to receive Separation Benefits. 

(q) “Special Payment Period” means, for a Separation-Eligible Participant, the sum of (1) and (2) below:

 (1) twelve (12) months; and 

(2) one (1) week for each full Vesting Year as of his Qualified Separation Date in excess often (10) but not in
excess of thirty-six (36), if any. 
 (r) “Weekly Base Pay” means: 

(1) in the case of an Eligible Participant who was compensated on a salaried basis as of the later of his Employment Date or
August 1, 2000, the Eligible Participant’s weekly base salary as of such date, adjusted for any subsequent merit increases (or for a pro rata portion of such merit increases if such increases are based on a greater regularly scheduled
workweek than the Eligible Participant’s regularly scheduled workweek as of the later of his Employment Date or August 1, 2000); 

  
 48 

 (2) in the case of an Eligible Participant who was compensated on a non-salaried
basis as of the later of his Employment Date or August 1, 2000, the number of hours per week such Eligible Participant was regularly scheduled to work as of such date multiplied by his regular hourly rate in effect on the day before his
Separation from Service, and 
 (3) in the case of a Disabled Participant, the amount calculated in accordance with
(1) or (2) above, whichever applies, determined as of the last day the Participant performed services for the Company immediately prior to the occurrence of his disability. 

4E.3 Elections of the Retirement and Separation Benefits. Any Retirement-Eligible Participant shall be entitled to elect to receive Retirement
Benefits or Separation Benefits, but not both. A Retirement-Eligible Participant must submit to the Company’s Human Resources Department a completed and signed election form, in such form and manner and at such time as may be required by the
Administrator. 
 4E.4 Computation of Retirement Benefits Under the Program. 

(a) Each Retirement-Eligible Participant who has not elected Separation Benefits in accordance with Section 4E.3 shall be
entitled to early retirement benefits regardless of the number of Vesting Years with which he has been credited. Such early retirement benefits shall be determined under Section 4.3; provided, however, that for purposes of calculating such
Retirement-Eligible Participant’s Accrued Benefit and determining any applicable reduction in the amount received upon early retirement: (1) such Participant’s Age on his Benefit Commencement Date shall be deemed to be his Enhanced
Age, (2) such Participant’s Benefit Years on his Benefit Commencement Date shall be deemed to be his Enhanced Benefit Years for purposes of Section 3.1(b), (3) such Participant’s aggregate Compensation for purposes of
Section 3.1(a)(2) shall he deemed to include an additional amount equal to his annual Compensation for the calendar year ending on or immediately preceding his Qualified Retirement Date, and (4) such Participant’s early retirement
benefits shall be determined using the early retirement reduction factors set forth on Schedule A. The Benefit Commencement Date of a Retirement-Eligible Participant shall not be earlier than the date he attains Age 50, determined without regard to
his Enhanced Age. 
 (b) The Accrued Benefit of a Retirement-Eligible Participant who has not elected Separation Benefits,
who satisfies the requirements of an Eligible Participant, other than paragraphs 4E.2(d)(2)(D) and 4E.2(d)(5), and who dies before his Qualified Retirement Date shall be calculated by applying paragraph 4E.4(a) as of the date of his death for
purposes of determining any death benefit payable on behalf of such Participant pursuant to Sections 5.3 or 5.4, notwithstanding his failure to satisfy paragraphs 4E.2(d)(2)(D) and/or 4E.2(d)(5). 

(c) Each Retirement-Eligible Participant who has not elected Separation Benefits and who is not employed by the Company under a
change in control agreement shall be entitled to receive an Annuity in addition to his Accrued Benefit, which Annuity shall be paid in accordance with Section 4E.6. 

  
 49 

 4E.5 Computation of Separation Benefits Under the Program 

(a) Each Separation-Eligible Participant shall be entitled to pension benefits determined in accordance with the terms of the
Plan; provided, however, that for purposes of calculating such Separation-Eligible Participant’s Accrued Benefit: (1) such Participant’s Age on his Benefit Commencement Date shall be deemed to be his Enhanced Age, (2) such
Participant’s Benefit Years on his Benefit Commencement Date shall be deemed to be his Enhanced Benefit Years for purposes of Section 3.1(b), and (3) such Participant’s aggregate Compensation for purposes of
Section 3.1(a)(2) shall be deemed to include an additional amount equal to the product of (i) one-twelfth (1/12) of his annual Compensation for the calendar year ending on or immediately preceding his Qualified Separation Date and
(ii) the difference between the number of months included in his Enhanced Benefit Years and the number of months included in his actual Benefit Years (up to a maximum of 480). 

For purposes of determining any reduction in the amount received by a Separation-Eligible Participant, if the Separation-Eligible
Participant’s Enhanced Age as of his Qualified Separation Date is at least 45, he is credited with at least ten (10) Enhanced Vesting Years as of his Qualified Separation Date and his Benefit Commencement Date occurs on or after the date
he attains Age 50, determined without regard to his Enhanced Age, such Participant’s pension benefits shall be determined using the enhanced vested pension factors set forth on Schedule B. 

(b) The Accrued Benefit of a Separation-Eligible Participant who satisfies the requirements of an Eligible Participant, other
than paragraphs 4E.2(d)(2)(D) and 4E.2(d)(5), and who dies before his Qualified Separation Date shall be calculated by applying paragraph 4E.5(a) as of the date of his death for purposes of determining any death benefit payable on behalf of such
Participant pursuant to Sections 5.3 or 5.4, notwithstanding his failure to satisfy paragraphs 4E.2(d)(2)(D) and/or 4E.2(d)(5). 

(c) Each Separation-Eligible Participant who is not employed by the Company under a change in control agreement shall be
entitled to receive an Annuity in addition to his Accrued Benefit, which Annuity shall be paid in accordance with Section 4E.6. 
 4E.6
Payment and Form of Annuities Under the Program. 
 (a) Each Eligible Participant described in Sections 4E.4(c) and 4E.5(c)
shall receive the sum of (l) the Actuarial Equivalent of his Annuity in the form of a Single Life Annuity commencing on his Normal Retirement Date (determined on the basis of the actuarial assumptions applicable under Appendix A of the Plan)
and (2) his Accrued Benefit, with such sum payable at such time, in such form and subject to such adjustments as may otherwise be applicable under Articles IV, IVE and V of the Plan. 

  
 50 

 
In. lieu of receiving such Actuarial Equivalent of his Annuity at such time and in such form as he receives his Accrued Benefits, such Eligible Participant may instead elect to receive immediate
payment of his Annuity in accordance with paragraph (b) below or an immediate distribution of his Lump Sum in accordance with paragraph (c) below. 

(b) An Eligible Participant may elect) in accordance with the procedure described in Section 4.3, to receive his Annuity
immediately, with payment to begin as of his Qualified Retirement Date or his Qualified Separation Date, whichever applies, in the following form: 

(1) The Annuity of an Eligible Participant who is unmarried on his Benefit Commencement Date shall be paid in the form of a
Single Life Annuity. 
 (2) The Annuity of an Eligible Participant who is married on his Benefit Commencement Date shall be
paid in the form of a Qualified Joint and Survivor Annuity. 
 (3) In lieu of payment in the form described in
(1) above, an Eligible Participant who is unmarried on his Benefit Commencement Date may elect to receive an immediate payment of his Annuity in the form of a contingent annuity, with 50% of the annuity payable upon his death to a contingent
beneficiary designated by him. The annuity described in the preceding sentence will be actuarially reduced using the factors described in Appendix A to reflect the payments which may become payable to the beneficiary. 

(4) In lieu of payment in the form described in (2) above, an Eligible Participant who is married on his Benefit
Commencement Date may elect to receive an immediate payment of his Annuity in the form of a Single Life Annuity. 
 (c) In
lieu of his Annuity, an Eligible Participant may elect to receive an immediate payment of his Lump Sum, with payment to be made as of his Qualified Separation Date or Qualified Retirement Date, whichever applies, in a single sum. 

(d) Any election pursuant to paragraph (b)(3),(b)(4) or (c) above by an Eligible Participant shall be made in writing in a
manner prescribed by the Company and may be made or revoked at any time within the 90-day period preceding the Benefit Commencement Date but in no event earlier than the date on which the Participant receives the notice described in
Section 5.5(a) and, in the case of an Eligible Participant who is married on his Benefit Commencement Date, shall be subject to the spousal consent requirements described in Section 5.7. 

(e) In the case of an individual who satisfies the requirements of an Eligible Participant, other than paragraphs 4E.2(d)(2)(D)
and 4E.2(d)(5), and who dies before his Qualified Separation Date or Qualified Retirement Date, whichever applies, the Actuarial Equivalent of such Participant’s Annuity in the form of a Single Life Annuity commencing on his Normal Retirement
Date (determined on the basis of the actuarial assumptions applicable under Appendix A of the Plan) shall be added to his Accrued Benefit for the purpose of determining any death benefit payable on behalf of such Participant pursuant to Sections 5.3
and 5.4, notwithstanding his failure to satisfy paragraphs 4E.2(d)(2)(D) and/or 4E.2(d)(5). 

  
 51 

 ARTICLE V. Form of Pensions. 

5.1 Unmarried Participants. The monthly annuity of a Participant who is unmarried on his Benefit Commencement Date shall be paid as a Single
Life Annuity unless he elects an optional form of benefit under Section 5.3 or receives a lump sum distribution under Section 5.6. 

5.2 Married Participants. 

(a) The monthly annuity of a Participant who is married on his Benefit Commencement Date, shall be paid as a Qualified Joint
and Survivor Annuity, unless he elects an optional form of benefit under Paragraph (b) or Section 5.3 or receives a lump sum distribution under Section 5.6. 

(b) A Participant described in Paragraph (a) may elect to waive the Qualified Joint and Survivor Annuity and receive his
annuity in the form of a Single Life Annuity. Any such election shall be subject to the spousal consent requirements described in Section 5.7, shall be made in writing in a manner prescribed by the Company and may be made or revoked at any time
within the 90 day period preceding the Benefit Commencement Date elected by the Participant but in no event earlier than the date on which the Participant receives the notice described in Section 5.5(a). 

5.3 Contingent Annuity Option. 

(a) An Active Participant (including a Participant who is treated as an Active Participant for purposes of Section 4.3 and
this Section 5.3, but not for any other provision of the Plan) who has at least 14 Benefit Years, or who has attained Age 65 and has at least 5 Benefit Years, or a Participant (including a Participant who continues to be treated as an Active
Participant for purposes of Section 4.3 and Section 5.3, but not for any other provision of the Plan) who had a Separation from Service after becoming eligible for early retirement under Section 4.3 (hereinafter referred to as an
“Eligible Participant”), may elect, in writing on a form prescribed by the Administrator, a Contingent Annuity Option under which he may designate a percentage of his annuity to be paid upon his death to a contingent beneficiary designated
by him. The percentage so designated shall be 25%, 50%, 75% or 100%, as the Participant elects, and may be changed by an Eligible Participant at any time prior to the later of the Participant’s Normal Retirement Date or Separation from Service.
The annuity otherwise payable to a Participant electing a Contingent Annuity Option or to his contingent beneficiary will be actuarially reduced using the factors described in Appendix A to reflect the payments which may become payable to the
beneficiary. Notwithstanding the above, if the Eligible Participant’s Spouse is designated as contingent beneficiary, the actuarial reduction will not reflect the cost of a joint and survivor annuity option providing a survivor annuity to the
Participant’s Spouse of (1) 50% of the amount payable to the Participant, if a 50%, 75% or 100% contingent annuity option is elected, or (2) 25% of the amount payable to 

  
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the Participant, if a 25% contingent annuity option is elected; provided, however, that the subsidy described in this sentence shall not apply to a former spouse who is to be treated as a
Participant’s spouse pursuant to a qualified domestic relations order, unless the qualified domestic relations order specifically provides that such subsidy applies to the former spouse. If the contingent beneficiary is other than the Spouse,
the percentage payable to the contingent beneficiary after the Participant’s death may not exceed the applicable percentage from Appendix B. The Contingent Annuity Option of an electing Participant who has a Separation from Service and is not
eligible for early retirement under Section 4.3 shall be canceled. 
 (b) (1) An Eligible Participant’s election or
change in election under Paragraph (a) shall become effective on the first of the month next following the date such election or change is properly filed with the Administrator. 

(2) An Eligible Participant’s election under Paragraph (a) shall not be valid upon a Participant’s Benefit
Commencement Date if such election is not confirmed in writing by such Participant, with spousal consent as described in Section 5.7, within the 90 day period preceding the Benefit Commencement Date, and in no event earlier than the date on
which the Participant receives the notice described in Section 5.5(a). If an Eligible Participant has made no election under Paragraph (a), or has made an invalid election, as of his Benefit Commencement Date, such Participant’s pension
shall be paid as described in Section 5.1 or 5.2, whichever applies. 
 (3) (A) The election under Paragraph (a) in
effect for an Eligible Participant who is married on the date of his death shall not be valid upon the Participant’s death unless (i) the spousal consent requirements of Section 5.7 are satisfied; (ii) if the Participant’s
death occurs after the first day of the Plan Year in which the Participant attains Age 35, the Participant’s election was made or confirmed in writing (with the applicable spousal consent) on or after the first day of such Plan Year, and
(iii) in the event that the election in effect under Paragraph (a) does not provide for a survivor benefit to the Participant’s surviving Spouse, the Participant has made no change to his election under Paragraph (a) that has not
yet taken effect which would result in a survivor benefit payable to his Spouse. If an Eligible Participant who is married at the time of his death has made no election, or has made an invalid election, the Participant’s surviving Spouse shall
receive the benefit described in Section 5.4. With respect to an Eligible Participant described in the preceding sentence, no additional benefit shall be payable to any other contingent beneficiary or to the Participant’s estate. 

(B) If an Eligible Participant (1) is unmarried at the time of his death, (2) is survived by one or more children,
(3) has not begun receiving any benefits hereunder, and (4) either has failed to make a valid election under Paragraph (A) or is not survived by a designated contingent beneficiary, a benefit equal to the amount that would be payable
assuming that the Participant made a valid election under Paragraph (a) and designated a percentage of 100% shall be paid to the Participant’s surviving children, if any, in equal shares. For all purposes of the Plan, where applicable, the
person to whom benefits are payable pursuant to this Paragraph (b) shall be treated as the Participant’s contingent beneficiary. 

  
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 (c) Except as provided in Paragraph (b): 

(1) If an electing Participant who has had a Separation from Service whose Contingent Annuity Option has not been canceled dies
on or after the effective date of the option, his contingent beneficiary, if surviving, will receive an annuity for life beginning as of the first day of the second month following his death and based upon the designated percentage of the annuity
which the Participant was receiving or to which he would have been entitled; provided, however, that, if the contingent beneficiary is the Participant’s surviving Spouse and the designated percentage is at least 50%, payment to the Spouse shall
not begin prior to what would have been the Participant’s Normal Retirement Date without the Spouse’s written consent made within the 90-day period preceding the Benefit Commencement Date. 

(2) If an electing Active Participant dies on or after the effective date of the option, his contingent beneficiary, if living,
shall receive an annuity, for life, beginning as of the first day of the second month following the month in which the Participant’s death occurs, based upon the designated percentage of the benefit to which the Participant would have been
immediately entitled if he had retired on the date of his death; provided, however, that, if the contingent beneficiary is the Participant’s surviving Spouse, the designated percentage shall be deemed to be 100%, and payment to such Spouse
shall not begin prior to what would have been the Participant’s Normal Retirement Date without the Spouse’s written consent made within the 90-day period preceding the Benefit Commencement Date. For purposes of this Subparagraph only, the
annuity to which a Participant would have been entitled shall be his Accrued Benefit reduced in accordance with Section 4.3 and, if applicable, reduced further by 4% per year (to the nearest one-twelfth year) for any period by which his
age at the time of his death is less than 50. 
 (d) (1) If the contingent beneficiary dies after the effective date of the
option and after the later of the Participant’s Normal Retirement Date or his Separation from Service, the reduced annuity payable to the Participant will remain in effect. 

(2) If the contingent beneficiary dies after the effective date of the option, but prior to the later of the Participant’s
Normal Retirement Date or his Separation from Service, the option shall be canceled upon receipt of proof of death. If the Participant has not then reached his Normal Retirement Date or has not had a Separation from Service, the Participant may
elect a subsequent Contingent Annuity Option effective immediately upon notice to the Company, subject to the conditions stated herein. If he has reached his Normal Retirement Date and has had a Separation from Service, the Participant may not make
any further elections. 

  
 54 

 (e) Subject to the conditions of Paragraph (a), an Eligible Participant may make
or change his election and designate or change a beneficiary and/or designate a revised benefit percentage at any time prior to the later of the Participant’s Normal Retirement Date or Separation from Service. An Eligible Participant may,
regardless of whether he has previously made a different election under this Section 5.3, elect in writing to receive his annuity in the form provided in Section 5.1 or 5.2, whichever applies, or in such other form as is permitted under
Paragraph (a), subject to the provisions of Section 5.7. The Participant may make such an election at any time before the Benefit Commencement Date but such an election may not be revoked after the Benefit Commencement Date, except as provided
in Paragraph (d)(2). Notwithstanding the foregoing, effective July 15, 1990, a Participant who has not reached his Normal Retirement Date and who elects a form of benefit under this Section 5.3 may waive any right to change his election in
the future and irrevocably elect a specific Contingent Annuity Option as of his Benefit Commencement Date. 
 (f) Commencing
with payments due September 1, 1986, the minimum monthly annuity to which a designated beneficiary under a Contingent Annuity Option described in this Section 5.3 shall be entitled is $150. 

5.4 Death Benefits for Other Vested Participants. 

(a) Eligibility. A death benefit shall be payable under this Section 5.4 with respect to a Participant who dies prior to
his Benefit Commencement Date if on the date of his death he is married and: 
 (1) he does not meet the requirements for the
Contingent Annuity Option described in Section 5.3, and 
 (A) he is an Employee who has met the requirements for early
or normal retirement under the Plan; or 
 (B) he is a former Employee who has had a Separation from Service after meeting
the requirements of Section 4.3; or 
 (C) he has been married for at least one year to the same Spouse and has at
least five Vesting Years to his credit, or 
 (2) he does meet the requirements described in Section 5.3 but has made no
election, or has made an invalid election, under that Section. 
 (b) Amount of Benefit. Upon the death of a Participant
described in Section 5.4(a), the Participant’s surviving Spouse, if living on the date set forth in Subparagraph (1)-(4) of this Section, whichever shall apply, shall receive a pension in accordance with the following rules: 

(1) If the Participant is an Employee who has met the requirements for retirement under Sections 4.1-4.3, the pension to the
surviving Spouse shall begin, as elected in writing by the Spouse not more than 90 days prior to the Spouse’s Benefit Commencement Date, on the first day of the month following the month in which the Participant’s death occurs or the first
day of any month thereafter, shall end with the 

  
 55 

 
payment on the first day of the month in which the Spouse’s death occurs, and shall be in a monthly amount equal to the amount the Spouse would have received if the Participant had a
Separation from Service on the date of his death, had survived and retired on the Benefit Commencement Date elected by the Spouse and had elected an immediate pension in the form of a 100% Contingent Annuity Option; provided, however, that
(A) the Spouse’s Benefit Commencement Date shall not be later than the later of (i) the Participant’s Normal Retirement Date or (ii) the first day of the month following the month in which the Participant’s death occurs
and (B) the benefit payable to the Spouse of a Participant described in Section 5.4(a)(2) shall be determined without regard to any otherwise applicable actuarial reduction reflecting the cost of the 100% Contingent Annuity Option. 

(2) If the Participant is an Employee who has not met the requirements for retirement under Sections 4.1-4.3, the pension to
the surviving Spouse shall begin, as elected in writing by the Spouse not more than 90 days prior to the Spouse’s Benefit Commencement Date, on the first day of the month following the month in which the Participant would have first been
eligible to receive his pension under Section 4.4 if he had a Separation from Service on the date of his death and had not died, or the first day of any month thereafter, shall end with the payment on the first day of the month in which the
Spouse’s death occurs, and shall be in a monthly amount equal to the amount the Spouse would have received if the Participant’s Separation from Service had occurred on the day of his death and he had survived and elected to begin receiving
his pension in the form of a 100% Contingent Annuity Option on the Benefit Commencement Date elected by the Spouse; provided, however, that (A) the Spouse’s Benefit Commencement Date shall not be later than what would have been the
Participant’s Normal Retirement Date and (B) the benefit payable to the Spouse of a Participant described in Section 5.4(a)(2) shall be determined without regard to any otherwise applicable actuarial reduction reflecting the cost of
the 100% Contingent Annuity Option. 
 (3) If the Participant is a former Employee who retired under Sections 4.1-4.3, the
pension to the surviving Spouse shall begin, as elected in writing by the Spouse not more than 90 days prior to the Spouse’s Benefit Commencement Date, on the first day of the month following the month in which the Participant’s death
occurs or the first day of any month thereafter, shall end with the payment on the first day of the month in which the Spouse’s death occurs, and shall be in a monthly amount equal to the amount the Spouse would have received if the Participant
had elected to begin receiving his pension in the form of a 100% Contingent Annuity Option on the Benefit Commencement Date elected by the Spouse; provided, however, that (A) the Spouse’s Benefit Commencement Date shall not be later than
the later of (i) the Participant’s Normal Retirement Date or (ii) the first day of the month following the month in which the Participant’s death occurs and (B) the benefit payable to the Spouse of a Participant described in
Section 5.4(a)(2) shall be determined without regard to any otherwise applicable actuarial reduction reflecting the cost of the 100% Contingent Annuity Option. 

  
 56 

 (4) If the Participant is a former Employee who did not meet the requirements for
retirement under Sections 4.1-4.3, the pension to the surviving Spouse shall begin, as elected in writing by the Spouse not more than 90 days prior to the Spouse’s Benefit Commencement Date, on the first day of the month following the month in
which the Participant would have first been eligible to receive his pension under Section 4.4 if he had not died or the first day of any month thereafter, shall end with the payment on the first day of the month in which the Spouse’s death
occurs, and shall be in a monthly amount equal to the amount the Spouse would have received if the Participant elected to begin receiving his actual pension in the form of a 100% Contingent Annuity Option on the Benefit Commencement Date elected by
the Spouse; provided, however, that the Spouse’s Benefit Commencement Date shall not be later than what would have been the Participant’s Normal Retirement Date. 

5.5 Notice to Participants. 

(a) Each Participant shall receive in written nontechnical language a general description or explanation of (1) the forms
of payment described in Sections 5.1, 5.2 and 5.3, including information explaining the relative values of each form of payment, (2) the Participant’s right to waive the form of payment described in Section 5.1 or 5.2(a), whichever
applies, and elect an optional form of payment and the financial effect of such an election on his pension, (3) the rights of the Participant’s Spouse, if any, with respect to the waiver and election, (4) the Participant’s right
to revoke an election to receive an optional form of payment and the effect of such revocation, (5) if the Participant has not reached his Normal Retirement Date, the Participant’s right to defer commencement of his pension until his
Normal Retirement Date and the financial effect of such deferment, and (6) a description of the relative value of the optional forms of benefit as compared to the Qualified Joint and Survivor Annuity. Such information shall be furnished to the
Participant not less than 30 days and not more than 90 days prior to the Participant’s Benefit Commencement Date, and the time for an election under this Section shall begin no earlier than the date such information is furnished. 

Notwithstanding the foregoing, effective for Plan Years beginning on or after January 1, 1997, the Participant’s
Benefit Commencement Date may be fewer than 30 days after the explanation described in this Section is provided if: 
 (1)
the Participant is given notice of his right to a 30-day period in which to consider whether to (i) waive the normal form of benefit and elect an optional form and (ii) to the extent applicable, consent to the distribution; 

(2) the Participant affirmatively elects a distribution and a form of benefit and the Spouse, if necessary, consents to the
form of the benefit elected; 
 (3) the Participant is permitted to revoke his affirmative election at any time prior to his
Benefit Commencement Date, or if later, the expiration of a 7-day period beginning on the day after the explanation described in this Section is provided to the Participant; 

  
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 (4) the Benefit Commencement Date is after the date the Administrator receives
written notice of the Participant’s intent to begin receiving benefits; and 
 (5) distribution to the Participant does
not commence before the expiration of the 7-day period described in paragraph (3) above. 
 Notwithstanding the
foregoing, effective for Plan Years beginning on or after January 1, 2004, the Participant’s Benefit Commencement Date may precede the explanation described in this Section, if the Participant so elects, provided that the following
conditions are satisfied: 
 (5) the date the on which the first payment to be received by the Participant is made (the
“initial payment date”) shall be no earlier than thirty (30) days following the date that the notice is furnished to the Participant, except that the initial payment date may be as early as the seventh day after such notice is
provided if (i) such notice clearly indicates that the Participant has a right to a period of thirty (30) days after receiving the notice to consider to waive the basic forms of distribution provided under the Plan and to elect (with
spousal consent) an optional form of benefit, (ii) the Participant affirmatively elects a form of distribution with the consent of his Spouse (if required) to commence as of the initial payment date, and (iii) the Participant is permitted
to revoke such election until the initial payment date; 
 (6) the notice shall be provided to the Participant no more than
ninety (90) days before the initial payment date, however, the Plan will not fail to satisfy the ninety (90)- day requirement if the delay in providing the distribution is due solely to an administrative delay; 

(7) the Participant is not permitted to elect an Benefit Commencement Date that precedes the date upon which the Participant
could have otherwise started receiving benefits under the terms of the Plan as in effect on the Benefit Commencement Date; 

(8) to the extent that a Participant has not received any payments for the period from the Benefit Commencement Date to the
initial payment date, the Participant shall receive a one-time payment to reflect any such missed payments (a “make-up payment”). Such make-up payment shall be adjusted for interest from the period beginning on the Benefit Commencement
Date and ending on the initial payment date, which shall be calculated with respect to such payments that would have been received prior to the initial payment date. The interest rate used to compute the adjustment described in the preceding
sentence shall equal the 30 Year Treasury rate for December of the preceding Plan Year. Notwithstanding the foregoing, with respect to any Annuity Starting Date on or after January 1, 2008, the interest rate used to compute the adjustment
described in the sentence above shall be the interest rate as specified or prescribed by the Commissioner of the Internal Revenue Service for purposes of Section 417(e)(3) of the Code, in revenue rulings, notices or other guidance for November
of the preceding Plan Year. For purposes of Section 4.6 of the Plan, the limitations set forth 

  
 58 

 
therein shall comply with the adjustments required thereto pursuant to Treasury Regulation 1.417(e)-1 with respect to any Benefit Commencement Date described in this paragraph which is a
“retroactive annuity starting date” as defined for purposes of such Regulation; and 
 (9) if a Participant who is
married elects to commence the Participant’s benefit as of the initial payment date pursuant to this paragraph, then the Participant’s Spouse (including an alternate payee who is treated as the Participant’s spouse under a qualified
domestic relations order), determined as of the initial payment date, must consent to such election if the survivor benefits payable as of the Benefit Commencement Date are less than the survivor benefits payable under the benefit described in
Section 5.2(a) of the Plan as of the initial payment date. 
 (b) Each Eligible Participant described in
Section 5.3(a) shall receive a written explanation of (1) the terms and conditions of the pre-retirement survivor annuity described in Section 5.4, (2) the Participant’s right to waive such survivor annuity in favor of the
death benefit under a Contingent Annuity Option and the effect of such waiver, (3) the rights of the Participant’s Spouse with respect to such waiver, and (4) the Participant’s right to revoke such waiver and the effect of such
revocation. Such explanation shall be provided when the Participant first becomes an Eligible Participant described in Section 5.3(a) and, if the Eligible Participant has not attained Age 32 at the time of the first notice, again within the
three-year period that begins on the first day of the Plan Year in which the Participant attains Age 32. 
 5.6 Cash-Outs. Effective on such
date as shall be determined by the Company, if the Actuarial Equivalent single-sum value, determined as of the date of distribution, of the vested Accrued Benefit of a Participant who has had a Separation from Service, or of the benefit payable to a
Spouse or other beneficiary under Section 5.3 or 5.4 by reason of the Participant’s death prior to his Benefit Commencement Date, is $5,000 or less, or, for distributions occurring on or after March 28, 2005, $1,000 or less, the
benefit shall be paid, as soon as administratively practicable following the later of (a) the Participant’s Separation from Service or death, or (b) the effective date of this Section 5.6, as a single-sum in settlement of all
liabilities of the Plan in connection with the Participant; provided, however, that no such payment shall be made after such benefit has commenced in any other form. 

5.7 Spousal Consent. No Participant’s election: 

(a) to waive the Qualified Joint and Survivor Annuity in favor of a form of payment other than a Contingent Annuity Option
providing for payment of at least 50% of the Participant’s annuity to his surviving Spouse, or 
 (b) to waive the death
benefit described in Section 5.4 in favor of the death benefit payable under a form of payment other than a Contingent Annuity Option described in Paragraph (a), above, 

  
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 shall be effective with respect to a Participant who is married unless the Participant’s Spouse (as of the
Benefit Commencement Date or date of death, whichever applies) consents thereto in writing, and such consent (1) acknowledges the effect of the election, (2) specifies the designated beneficiary or consents to such designation and consents
prospectively to any subsequent designation of beneficiary made by the Participant, acknowledging the Spouse’s right to limit consent to a specific alternate beneficiary, (3) specifies the optional form of payment or consents to such
election and consents prospectively to any subsequent choice of optional form made by the Participant, acknowledging the Spouse’s right to limit consent to a specific optional form, and (4) is witnessed by a Plan representative or by a
notary public, or the Administrator finds that the Spouse cannot be located. 
 5.8 Minimum Distribution Requirements. Notwithstanding
anything in the Plan to the contrary, the form and timing of all distributions under the Plan to any Participant, including a Participant whose Separation from Service occurred prior to January 1, 1989, shall be in accordance with
Section 401(a)(9) of the Code and regulations issued thereunder, including the incidental death benefit requirements of Section 401(a)(9)(G) of the Code and Treas. Reg. §1.401(a)(9)-2. 

5.9 Application for Benefits. Except as provided in Section 5.6 or in Section 5.3(c) for a non-Spouse contingent beneficiary,
benefit payments shall commence when properly written application for same is received by the Administrator. In the event that a Participant, or the Spouse of a deceased Participant entitled to benefits under the Plan fails to apply to the
Administrator by the earlier of (a) the Participant’s Normal Retirement Date or the date of the Participant’s Separation from service, if later, or (b) the end of the calendar year in which the Participant attains age 70-1/2, the
Administrator shall make diligent efforts to locate such Participant or Spouse and obtain such application. In the event the Participant or Spouse fails to make application by the Participant’s Required Beginning Date, subject to
Section 10.6, the Administrator shall commence distribution as of the Required Beginning Date without such application. No payments shall be made for the period in which benefits would have been payable if the Participant or Spouse had made
timely application therefor; provided, however, that, if the Participant’s Benefit Commencement Date or, if the Participant has died, his Spouse’s Benefit Commencement Date, has been delayed until after the Participant’s Normal
Retirement Date solely by reason of failure to make application, and not by reason of Suspension Service as described in Section 4.11(b), the benefit payable (i) to the Participant on and after his Benefit Commencement Date, or
(ii) to the Participant’s Spouse on and after the Spouse’s Benefit Commencement Date, shall be equal to the Actuarial Equivalent of the benefit the Participant or the Spouse would have received had benefits commenced on the
Participant’s Normal Retirement Date, as determined to reflect the deferral of benefit commencement. 
 5.10 Direct Rollovers. In the
event any payment or payments under the Plan to be made to a “eligible distributee” would constitute an “eligible rollover distribution,” such eligible distributee may request that, in lieu of payment to the eligible distributee,
all or part of such payment or payments be rolled over directly from the Trustee to the trustee of an “eligible retirement plan.” Any such request shall be made at the time and in the manner prescribed by the Administrator or its delegate,
subject to such requirements and restrictions as may be prescribed by applicable Treasury regulations. For purposes of this Section 5.10: 

(a) “eligible distributee” shall include the Participant, his Spouse or his alternate payee under a qualified
domestic relations order within the meaning of Section 414(p) of the Code or, effective January 1, 2008, the Participant’s beneficiary who is not the Participant’s Spouse; 

  
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 (b) “eligible rollover distribution” shall mean a distribution from the
Plan, excluding (i) any distribution that is one of a series of substantially equal periodic payments (not less frequently than annually) over the life (or life expectancy) of the eligible distributee, the joint lives (or joint life
expectancies) of the eligible distributee and eligible distributee’s designated beneficiary, or a specified period of ten (10) or more years, and (ii) any distribution to the extent such distribution is required under
Section 401(a)(9) of the Code; and 
 (c) “eligible retirement plan” shall mean (i) an individual
retirement account described in Section 408(a) of the Code, (ii) an individual retirement annuity described in Section 408(b) of the Code, (iii) an annuity plan described in Section 403(a) of the Code, (iv) a qualified
plan the terms of which permit the acceptance of rollover distributions, (v) an eligible deferred compensation plan described in Section 457(b) of the Code that is maintained by an eligible employer described in Section 457(e)(i)(A)
of the Code that shall separately account for the distribution, (vi) an annuity contract described in Section 403(b) of the Code or (vii) an individual retirement plan described in Section 408A(b) of the Code; provided, however,
that (x) with respect to a plan described in clause (vii), for transfers occurring before January 1, 2010, the eligible distributee meets the requirements of Section 408A(c)(3)(B) of the Code and (y) with respect to a
distribution (or portion of a distribution) to a person who is not the Participant or the surviving Spouse of the Participant, “eligible retirement plan” shall mean only a plan described in clause (i) or (ii) or, effective
January 1, 2010, clause (vii), that, in either case, is established for the purpose of receiving such distribution on behalf of such person. 

5.11. Special Lump Sum Payment Option. (a) Eligibility. A Participant (but not his or her Beneficiary) may elect to receive, during the
election period described in Paragraph (b), his or her deferred Accrued Benefit (“Deferred Annuity”) under Section 4.4 of the Plan in the form of a lump sum payment (“Special Lump Sum Payment”) or, an “Immediately
Commencing Annuity” (as defined below); provided, however, that: 
 (i) the Participant has a termination of employment
on or prior to June 30, 2012 and does not die and is not rehired during the period beginning July 1, 2012 and ending on the date payment is made or commences in accordance with this Section 5.11; 

(ii) such termination of employment is not on account of the Participant’s disability, following which the Participant is
receiving long-term disability payments under any long-term disability program of an Employer, including on June 30, 2012; 

(iii) the Participant’s Deferred Annuity is not subject to a qualified domestic relations order as defined in
Section 414(p) of the Code; 

  
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 (iv) the Participant is not immediately, as of his or her termination of
employment, eligible for early retirement benefits in accordance with this Article IV; 
 (v) the Participant is not on a
leave of absence or layoff from an Employer on June 30, 2012; 
 (vi) the Participant is not 70 1⁄2 years of age or older as of October 1, 2012; and 

(vii) the Participant can be located, after a diligent search, as necessary, by the Plan Administrator before July 1,
2012. 
 For each such Participant described in this Paragraph (a), the term “Immediately Commencing Annuity” shall
mean, as applicable, either: 
 (i) with respect to a Participant eligible to commence receipt of his or her Deferred Annuity
as of December 1, 2012, in accordance with the requirements of Section 4.4, any applicable optional form of annuity described in Article V; or 

(ii) with respect to any other Participant, a single life annuity, 50% “qualified joint and survivor annuity” (within
the meaning Section 417(b) of the Code) or a 75% “qualified optional survivor annuity” (within the meaning Section 417(g) of the Code). 

(b) Election and Election Period. To receive the distribution of benefits described in Paragraph (a), an eligible Participant
must voluntarily elect to receive a distribution pursuant to this Section 5.11 by completing an election form and spousal waiver, if required, provided by the Administrator, and submitting such forms to the Administrator after October 1,
2012 and before the following dates, as applicable, 
 (i) November 15, 2012, with respect to a Participant who elects a
Special Lump Sum Payment; and 
 (iii) December 15, 2012, with respect to a Participant who elects an Immediately
Commencing Annuity, 
 or such other period during 2012 determined by the Administrator. 

The Administrator shall provide each eligible Participant, not less than 30 days and not more than 180 days before the Benefit
Commencement Date, an application form including a general description of the material features, as well as an explanation of the relative values and financial effect, of the optional forms of benefit available under this Section 5.11, in a
manner that satisfies the notice requirements of Section 417(a)(3) of the Code and the regulations thereunder. The form shall indicate the Participant’s right to waive a survivor annuity, his or her surviving Spouse’s right to consent
to such waiver or refuse such consent, and the right to revoke any waiver, within the 180 day period 

  
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preceding the Benefit Commencement Date, and shall include a description of the right of the Participant, if any, to defer receipt of a distribution and the consequences of failure to defer such
receipt, in accordance with Treasury guidance under Section 411(a)(11) of the Code. 
 (c) Amount of Payment. The
Special Lump Sum Payment shall equal the actuarial equivalent of the Participant’s nonforfeitable Deferred Annuity, based on the following factors: 

(i) the applicable interest rate described in Section 417(e)(3) of the Code for August of 2011; 

(ii) an assumed commencement date of the later of (A) age 65, and (B) the Participant’s age as of
December 1, 2012; and 
 (iii) the applicable mortality table, as defined in Section 417 of the Code and the
regulations promulgated thereunder. 
 The Immediately Commencing Annuity shall be calculated: 

(i) in accordance with the applicable terms of the Plan, for a Participant who is eligible to immediately commence benefits
under the terms of the Plan as of the payment date set forth in Paragraph (d); and 
 (ii) as the actuarial equivalent of the
Special Lump Sum Payment, for each other Participant. 
 (d) Payment of Benefit. If an eligible Participant elects the
distribution of his or her Deferred Annuity in accordance with this Section 5.11, payment shall be made, or commence to be made, on or before December 1, 2012, or as soon as administratively practicable thereafter. 

(e) Death and Rehire. If an eligible Participant elects the distribution of his or her Deferred Annuity in accordance with this
Section 5.11 and subsequently dies or is rehired as an Employee before distributions commence, his or her election shall be null and void and the Participant’s benefit shall be paid pursuant to the Plan without regard to this
Section 5.11. Notwithstanding anything contained herein to the contrary, upon distribution of a Special Lump Sum Payment or an Immediately Commencing Annuity made to an individual in accordance with this Section 5.11, in the event of the
individual’s rehire with an Employer following the date such distribution is made, the individual shall not be eligible to participate in the Plan during such period of rehire and may be eligible to participate in the Exelon Corporation Cash
Balance Pension Plan or the Exelon Corporation Pension Plan for Bargaining Unit Employees (or such other plan that applies to employees of an Employer hired on or after December 1, 2012), as applicable, in accordance with their terms and
conditions. 

  
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 ARTICLE VI. Breaks in Service. 

6.1 Whenever used in this Article: 

(a) “One-Year Break in Service” means a calendar year in which an Employee completes 500 or fewer Hours of Service.

 (b) “Reemployment Date” means the first day on which an Employee who has had a Separation from Service completes
an Hour of Service in a calendar year that is not a One-Year Break in Service. 
 (c) “Reemployment Eligibility
Computation Period” means an Eligibility Computation Period determined as if the Employee’s Employment Date were his Reemployment Date. 

6.2 If an Employee has a Separation from Service before he has met the requirements for retirement under Sections 4.1-4.3 or for a deferred
annuity under Section 4.4, he shall be deemed to have received a distribution of his entire nonforfeitable Accrued Benefit of zero dollars upon such Separation from Service and his Eligibility Years, Accrued Benefit, Benefit Years, and Vesting
Years shall be canceled. 
 6.3 If an Employee completes at least 1000 Hours of Service in a Reemployment Eligibility Computation Period he
shall be credited with an Eligibility Year. 
 6.4 (a) The Eligibility Years of an Employee whose Eligibility Years have been canceled shall
be restored if: 
 (1) he is credited with an Eligibility Year with respect to a Reemployment Eligibility Computation Period
that begins on or after his Reemployment Date; and 
 (2) he again becomes an Employee at a time when the number of
consecutive One-Year Breaks in Service he has incurred is less than the greater of five or the number of Eligibility Years the Employee had to his credit on account of his employment prior to the first One-Year Break in Service. 

(b) If a former Employee whose Eligibility Years were not canceled under Section 6.2 or are restored under this Section
becomes an Eligible Employee, he shall become an Active Participant as of the later of the day he so becomes an Eligible Employee or the day he would have become an Active Participant under Article II if he had been an Eligible Employee at all times
since his prior Separation from Service. If a former Employee whose Eligibility Years were canceled under Section 6.2 and are not restored under this Section becomes an Eligible Employee, he shall become an Active Participant as provided in
Article II, except that his Reemployment Date shall be treated as his Employment Date. 

  
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 6.5 The Benefit Years and Accrued Benefit of an Employee whose Benefit Years have been canceled
shall be restored upon his reemployment if his Eligibility Years are restored under Section 6.4. If a Participant’s Benefit Years and Accrued Benefit were not canceled pursuant to Section 6.2 upon his prior Separation from Service,
his Benefit Years earned prior to his Separation from Service shall be aggregated with his Benefit Years earned after his Reemployment Date for purposes of determining the Participant’s Accrued Benefit; provided, however, that: 

(a) if the Participant previously received a single-sum distribution under Section 5.6 on or before the close of the
second Plan Year following the Plan Year in which the Participant’s Separation from Service occurred, the Participant’s Benefit Years earned prior to his Separation from Service shall be disregarded upon his reemployment; or 

(b) if the Participant received a single-sum distribution under Section 5.6 on a date later than that described in
Paragraph (a), the Participant’s Accrued Benefit determined on and after his reemployment shall be reduced by the Actuarial Equivalent of the distribution received by the Participant under Section 5.6 upon his prior Separation from
Service. 
 6.6 The Vesting Years of an Employee whose Vesting Years have been canceled shall be restored if: 

(a) he is credited with a Vesting Year after his Reemployment Date; and 

(b) he again becomes an Employee at a time when the number of consecutive One-Year Breaks in Service he has incurred is less
than the greater of five or the number of Vesting Years the Employee had to his credit on account of his employment prior to the first One-Year Break in Service. 

6.7 Notwithstanding any provision in the Plan to the contrary, effective January 1, 1996, an Employee who was transferred to COPCO and
whose benefits were transferred from the Plan in connection with the sale of COPCO shall receive, upon such Employee’s Reemployment Date, credit for years of service with the Company prior to such transfer for purposes of calculating
Eligibility Years and Vesting Years (but not Benefit Years). 
 ARTICLE VII. Contributions. 

7.1 Contributions by the Company. The Company shall contribute each year an amount actuarially determined to be sufficient to provide the
benefits under the Plan. All Company contributions to the Plan are conditioned upon their deductibility for Federal income tax purposes. The Company reserves the right, however, to reduce, suspend or discontinue its contributions under the Plan for
any reason at any time. Except as provided in this Section or Section 9.2, it shall be impossible for any part of the Company’s contributions to revert to the Company, or to be used for, or diverted to, any purpose other than for the
exclusive benefit of Participants, annuitants and their beneficiaries. In the case of a contribution (a) made by the Company as a mistake of fact, or (b) for which a tax deduction is disallowed, in whole or in part, by the Internal Revenue
Service, the Company shall receive a refund of said contribution within one year after payment of a contribution as a mistake of fact, or within one year after disallowance of a tax deduction, to the extent of such disallowance, as the case may be.

  
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 7.2 Source of Benefits. All benefits under the Plan shall be paid exclusively from the Fund, and
the Company shall have no duty to contribute thereto except as provided in this Article. 
 ARTICLE VIII. Administration. 

8.1 The Administrator. (a) In General. The Company acting through its Vice President, Health & Benefits, or such other
person or committee appointed by the Chief Human Resources Officer from time to time (such vice president or other person or committee, the “Administrator”), shall be the “administrator” of the Plan, within the meaning of such
term as used in ERISA. In addition, the Administrator shall be the “named fiduciary” of the Plan, within the meaning of such term as used in ERISA, solely with respect to administrative matters involving the Plan and not with respect to
any investment of the Plan’s assets. The Administrator shall have the following duties, responsibilities and rights: 

(i) The Administrator shall have the duty and discretionary authority to interpret and construe this Plan in regard to all
questions of eligibility, the status and rights of Participants, Retirees, Beneficiaries and other persons under this Plan, and the manner, time, and amount of payment of any distributions under this Plan. The determination of the Administrator with
respect to an Employee’s years of Credited Service, the amount of the Employee’s Earnings, Highest Average Annual Pay, Federal Benefit and any other matter affecting payments under the Plan shall be final and binding. Benefits under the
Plan shall be paid to a Participant or Beneficiary only if the Administrator, in his discretion, determines that such person is entitled to benefits. 

(ii) Each Employer shall, from time to time, upon request of the Administrator, furnish to the Administrator such data and
information as the Administrator shall require in the performance of his duties. 
 (iii) The Administrator shall direct the
Trustee to make payments of amounts to be distributed from the Trust under Article 6 (relating to Service Annuity forms). In addition, it shall be the duty of the Administrator to certify to the Trustee the names and addresses of all Retirees, the
amounts of all Service Annuities, the dates of death of Retirees and all proceedings and acts of the Administrator necessary or desirable for the Trustee to be fully informed as to the Service Annuities to be paid out of the Trust. 

(iv) The Administrator shall have all powers and responsibilities necessary to administer the Plan, except those powers that
are specifically vested in the Investment Office, the Corporate Investment Committee or the Trustee. 
 (v) The Administrator
may require a Participant or Beneficiary to complete and file certain applications or forms approved by the Administrator and to furnish such information requested by the Administrator. The Administrator and the Plan may rely upon all such
information so furnished to the Administrator. 

  
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 (vi) The Administrator shall be the Plan’s agent for service of legal
process and forward all necessary communications to the Trustee. 
 (b) Removal of Administrator. The Chief Human Resources Officer
shall have the right at any time, with or without cause, to remove the Administrator (including any member of a committee that constitutes the Administrator). The Administrator may resign and the resignation shall be effective upon delivery of the
written resignation to the Chief Human Resources Officer or upon the Administrator’s termination of employment with the Employers. Upon the resignation, removal or failure or inability for any reason of the Administrator to act hereunder, the
Chief Human Resources Officer shall appoint a successor. Any successor Administrator shall have all the rights, privileges and duties of the predecessor, but shall not be held accountable for the acts of the predecessor. None of the Company, any
officer, employee or member of the board of directors of the Company who is not the Chief Human Resources Officer, nor any other person shall have any responsibility regarding the retention or removal of the Administrator. 

8.2 The Investment Office. The Investment Office shall be the “named fiduciary” of the Plan, within the meaning of such term as used
in ERISA, solely with respect to matters involving the investment of assets of the Plan and, any contrary provision of the Plan notwithstanding, in all events subject to the limitations contained in Section 404(a)(2) of ERISA and all other
applicable limitations. In addition to the duties, responsibilities and rights of the Investment Office set forth in Article 8, the Investment Office shall have the following duties, responsibilities and rights: 

(i) The Investment Office shall be the “named fiduciary” for purposes of directing the Trustee as to the investment
of amounts held in the Fund and for purposes of appointing one or more investment managers as described in ERISA. 
 (ii) The
Investment Office shall submit to the Corporate Investment Committee annual manager review results and such other reports and documents as may be necessary for the Corporate Investment Committee to monitor the activities and performance of the
Investment Office. 
 (iii) Each Employer shall, from time to time, upon request of the Investment Office, furnish to the
Investment Office such data and information as the Investment Office shall require in the performance of its duties. 
 8.3 The Corporate
Investment Committee. The Company acting through the Corporate Investment Committee shall be responsible for overall monitoring of the performance of the Investment Office. The Corporate Investment Committee shall have the following duties,
responsibilities and rights: 
 (i) The Corporate Investment Committee shall monitor the activities and performance of the
Investment Office and shall review annual manager review results and any other reports and documents submitted by the Investment Office. 

(ii) The Corporate Investment Committee shall have authority to approve asset allocation recommendations of the Investment
Office, and approve the retention or firing of any investment consultant (but not any investment manager), custodian or trustee, as recommended by the Investment Office. 

  
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 (iii) The Corporate Investment Committee and the Company’s Chief Investment
Officer shall have the right at any time, with or without cause, to remove one or more employees of the Exelon Investment Office or to appoint another person or committee to act as Investment Office. Any successor Investment Office employee shall
have all the rights, privileges and duties of the predecessor, but shall not be held accountable for the acts of the predecessor. 
 The
power and authority of the Corporate Investment Committee with respect to the Plan shall be limited solely to the monitoring and removal of the employees of the Investment Office and approval of the recommendations specified in clause
(ii) above. The Corporate Investment Committee shall have no responsibility for making investment decisions, appointing or firing investment managers or for any other duties or responsibilities with respect to the Plan, other than those
specifically listed herein. 
 8.4 Status of Administrator, the Investment Office and the Corporate Investment Committee. The Administrator,
any person acting as, or on behalf of, the Investment Office, and any member of the Corporate Investment Committee may, but need not, be an Employee, trustee or officer of an Employer and such status shall not disqualify such person from taking any
action hereunder or render such person accountable for any distribution or other material advantage received by him under this Plan, provided that no Administrator, person acting as, or on behalf of, the Investment Office, or any member of the
Corporate Investment Committee who is a Participant shall take part in any action of the Administrator or the Investment Office on any matter involving solely his rights under this Plan. 

8.5 Notice to Trustee of Members. The Trustee shall be notified as to the names of the Administrator and the person or persons authorized to
act on behalf of the Investment Office. 
 8.6 Allocation of Responsibilities. Each of the Administrator, the Investment Office and the
Corporate Investment Committee may allocate their respective responsibilities and may designate any person, persons, partnership or corporation to carry out any of such responsibilities with respect to the Plan. Any such allocation or designation
shall be reduced to writing and such writing shall be kept with the records of the Plan. 
 8.7 General Governance. The Corporate Investment
Committee shall elect one of its members as chairman and appoint a secretary, who may or may not be a member of such Committee. All decisions of the Corporate Investment Committee shall be made by the majority, including actions taken by written
consent. The Administrator, the Investment Office and the Corporate Investment Committee may adopt such rules and procedures as it deems desirable for the conduct of its affairs, provided that any such rules and procedures shall be consistent with
the provisions of the Plan. 

  
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 8.8 Indemnification. The Employers hereby jointly and severally indemnify the Administrator, the
persons employed in the Exelon Investment Office, the members of the Corporate Investment Committee, the Chief Human Resources Officer, and the directors, officers and employees of the Employers and each of them, from the effects and consequences of
their acts, omissions and conduct in their official capacity with respect to the Plan (including but not limited to judgments, attorney fees and costs with respect to any and all related claims, subject to the Company’s notice of and right to
direct any litigation, select any counsel or advisor, and approve any settlement), except to the extent that such effects and consequences result from their own willful misconduct. The foregoing indemnification shall be in addition to (and secondary
to) such other rights such persons may enjoy as a matter of law or by reason of insurance coverage of any kind. 
 8.9 No Compensation. None
of the Administrator, any person employed in the Exelon Investment Office nor any member of the Corporate Investment Committee may receive any compensation or fee from the Plan for services as the Administrator, Investment Office or a member of the
Corporate Investment Committee; provided, however that nothing contained herein shall preclude the Plan from reimbursing the Company or any Affiliate for compensation paid to any such person if such compensation constitutes “direct
expenses” for purposes of ERISA. The Employers shall reimburse the Administrator, the persons employed in the Exelon Investment Office and the members of the Corporate Investment Committee for any reasonable expenditures incurred in the
discharge of their duties hereunder. 
 8.10 Employ of Counsel and Agents. The Administrator, the Investment Office and the Corporate
Investment Committee may employ such counsel (who may be counsel for an Employer) and agents and may arrange for such clerical and other services as each may require in carrying out its respective duties under the Plan. 

8.11 Claims Procedures. Any Participant or distributee who believes he is entitled to benefits in an amount greater than those which he is
receiving or has received may file a claim with the Administrator (or its delegate). Such a claim shall be in writing and state the nature of the claim, the facts supporting the claim, the amount claimed, and the address of the claimant. The
Administrator (or its delegate) shall review the claim and, unless special circumstances require an extension of time, within 90 days after receipt of the claim, give notice to the claimant, either in writing by registered or certified mail or in an
electronic notification, of the decision with respect to the claim. Any electronic notice delivered to the claimant shall comply with the standards imposed by applicable regulations. If it is determined that special circumstances require an
extension of time for processing the claim, the claimant shall be so advised in writing within the initial 90-day period and in no event shall such an extension exceed 90 days. The extension notice shall indicate the special circumstances requiring
an extension of time and the date by which it is expected that the benefit determination will be rendered. The notice of the decision with respect to the claim shall be written in a manner calculated to be understood by the claimant and, if the
claim is wholly or partially denied, shall notify the claimant of the adverse benefit determination and shall set forth the specific reasons for the adverse determination, the references to the specific Plan provisions on which the determination is
based, a description of any additional material or information necessary for the claimant to perfect the claim, an explanation of why such material or information is necessary, and a description of the claim review procedure under the Plan and the
time limits applicable to such procedures, including a statement of the claimant’s right to bring a civil action under Section 502 of ERISA following an adverse benefit determination on review. The notice shall also advise the

  
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claimant that the claimant or the claimant’s duly authorized representative may request a review by the Administrator (or its delegate) of the adverse benefit determination by filing, within
60 days after receipt of a notification of an adverse benefit determination, a written request for such review. The claimant shall be informed that, within the same 60-day period, he (a) may be provided, upon request and free of charge,
reasonable access to, and copies of, all documents, records and other information relevant to the claimant’s claim for benefits and (b) may submit written comments, documents, records and other information relating to the claim for
benefits. If a request is so filed, review of the adverse benefit determination shall be made by the Administrator (or its delegate) within, unless special circumstances require an extension of time, 60 days after receipt of such request, and the
claimant shall be given written notice of the final decision. If it is determined that special circumstances require an extension of time for processing the claim, the claimant shall be so advised in writing within the initial 60-day period and in
no event shall such an extension exceed 60 days. The extension notice shall indicate the special circumstances requiring an extension of time and the date by which the determination on review is expected to be rendered. The review shall take into
account all comments, documents, records and other information submitted by the claimant relating to the claim, without regard to whether such information was submitted or considered in the initial benefit determination. The notice of the final
decision shall include specific reasons for the determination and references to the specific Plan provisions on which the determination is based and shall be written in a manner calculated to be understood by the claimant. 

8.12 Actuary to Be Employed. The Company or the Investment Office shall engage an actuary to do such technical and advisory work as the
Company or the Investment Office may request, including analyses of the experience of this Plan from time to time, the preparation of actuarial tables for the making of computations thereunder, and the submission to the Company or the Investment
Office of an annual actuarial report, which report shall contain information showing the financial condition of this Plan, a statement of the contributions to be made by the Employers for the ensuing year, and such other information as may be
requested by the Company or the Investment Office. 
 8.13 Funding Policy. The board of directors of the Company shall establish a funding
policy and method consistent with the objectives of this Plan and the requirements of Title I of ERISA and shall communicate such policy and method, and any changes in such policy and method, to the Investment Office. 

8.14 Notices to Participants, Etc. All notices, reports and statements given, made, delivered or transmitted to a Participant or any other
person entitled to or claiming benefits under this Plan shall be deemed to have been duly given, made or transmitted when mailed by first class mail with postage prepaid and addressed to the Participant or such other person at the address last
appearing on the records of the Administrator. 
 8.15 Notices to Employers or Administrator. Written directions, notices and other
communications from Participants or any other person entitled to or claiming benefits under this Plan to the Employers or Administrator shall be deemed to have been duly given, made or transmitted either when delivered to such location as shall be
specified upon the forms prescribed by the Administrator for the giving of such directions, notices and other communications or when mailed by first class mail with postage prepaid and addressed to the addressee at the address specified upon such
forms. 

  
 70 

 8.16 Records. Each of the Administrator, the Investment Office and the Corporate Investment
Committee shall keep a record of all of their respective proceedings, if any, and shall keep or cause to be kept all books of account records and other data as may be necessary or advisable in their respective judgment for the administration of the
Plan, the administration of the investments of the Plan or the monitoring of the investment activities of the Plan, as applicable. 
 8.17
Responsibility to Advise Administrator of Current Address. Each person entitled to receive a payment under this Plan shall file with the Administrator in writing such person’s complete mailing address and each change therein. A check or
communication mailed to any person at such person’s address on file with the Administrator shall be deemed to have been received by such person for all purposes of this Plan. Although neither the Administrator nor the Trustee shall be obliged
to search for or ascertain the location of any person, the Administrator shall make reasonable efforts to locate any missing Participant or Beneficiary entitled to benefits hereunder. If the Administrator is in doubt as to whether payments are being
received by the person entitled thereto, it shall, by registered mail addressed to the person concerned at his last address known to the Administrator, notify such person that all future payments will be withheld until such person submits to the
Administrator evidence of his continued life and proper mailing address. 
 8.18 Electronic Media. Notwithstanding any provision of the Plan
to the contrary and for all purposes of the Plan, to the extent permitted by the Administrator and any applicable law or Regulation, the use of electronic technologies shall be deemed to satisfy any written notice, consent, delivery, signature,
disclosure or recordkeeping requirement under the Plan, the Code or ERISA to the extent permitted by or consistent with applicable law and Regulations. Any transmittal by electronic technology shall be deemed delivered when successfully sent to the
recipient, or such other time specified by the Administrator. 
 8.19 Correction of Error. If it comes to the attention of the Administrator
that an error has been made in the amount of benefits payable, or paid, to any Participant or Beneficiary under the Plan, the Administrator shall be permitted to correct such error by whatever means that the Administrator, in its sole discretion
determines, including by offsetting future benefits payable to the Participant or Beneficiary or requiring repayment of benefits to the Plan, except that no adjustment need be made with respect to any Participant or Beneficiary whose benefit has
been distributed in full prior to the discovery of such error. 
 8.20 Applicable Law. Except to the extent preempted by applicable federal
law or otherwise provided under the terms of the Plan, the Plan and all rights hereunder shall be governed by and construed in accordance with the laws of the State of Illinois. 

8.21 Statute of Limitations for Actions under the Plan. Except for actions to which the statute of limitations prescribed by Section 413
of ERISA applies, (a) no legal or equitable action relating to a claim for benefits under Section 502 of ERISA may be commenced later than one year after the claimant receives a final decision from the Chief Human Resources

  
 71 

 
Officer (or such other officer designated from time to time by the Chief Human Resources Officer) in response to the claimant’s request for review of the adverse benefit determination and
(b) no other legal or equitable action involving the Plan may be commenced later than two years from the time the person bringing an action knew, or had reason to know, of the circumstances giving rise to the action. This provision shall not be
interpreted to extend any otherwise applicable statute of limitations, nor to bar the Plan or its fiduciaries from recovering overpayments of benefits or other amounts incorrectly paid to any person under the Plan at any time or bringing any legal
or equitable action against any party. 
 8.22 Forum for Legal Actions under the Plan. Any legal action involving the Plan that is brought
by any Participant, any Beneficiary or any other person shall be litigated in the federal courts located in the Northern District of Illinois or the Eastern District of Pennsylvania, whichever is most convenient, and no other federal or state court.

 8.23 Legal Fees. Any award of legal fees in connection with an action involving the Plan shall be calculated pursuant to a method that
results in the lowest amount of fees being paid, which amount shall be no more than the amount that is reasonable. In no event shall legal fees be awarded for work related to (a) administrative proceedings under the Plan, (b) unsuccessful
claims brought by a Participant, Beneficiary or any other person, or (c) actions that are not brought under ERISA. In calculating any award of legal fees, there shall be no enhancement for the risk of contingency, nonpayment or any other risk
nor shall there be applied a contingency multiplier or any other multiplier. In any action brought by a Participant, Beneficiary or any other person against the Plan, the Administrator, the Investment Office, the Corporate Investment Committee, any
Plan fiduciary, the Chief Human Resources Officer, any Plan administrator, the Company, its affiliates or their respective officers, directors, employees, or agents (the “Plan Parties”), legal fees of the Plan Parties in connection with
such action shall be paid by the Participant, Beneficiary or other person bringing the action, unless the court specifically finds that there was a reasonable basis for the action. 

ARTICLE IX. Amendment and Termination. 
 9.1
Amendment. Exelon Corporation may amend the Plan at any time for any reason. Each amendment to the Plan shall be adopted by Exelon Corporation’s Board of Directors (or a committee thereof); provided, however, that in the case of any amendment
or modification that would not result in an aggregate annual cost to the Company of more than $50,000,000, the Plan may be amended or modified by action of the Chief Human Resources Officer (with the consent of the Chief Executive Officer in the
case of a discretionary amendment or modification expected to result in an increase in annual expense or liability account balance exceeding $250,000) or another executive officer holding title of equivalent or greater responsibility. If an
amendment changes the vesting provisions of the Plan, any person who is a Participant on the later of the date the amendment is adopted or becomes effective shall have at all times a vested interest in his Accrued Benefit as of that date determined
without regard to the amendment. In addition, within a reasonable period determined by the Exelon Corporation in accordance with regulations issued by the Secretary of the Treasury, any Participant who has at least three Vesting Years to his credit
on the last day of the election period may elect to have his vested interest in his entire Accrued Benefit determined without regard to the amendment. Except as otherwise permitted by law, no amendment shall reduce a Participant’s Accrued
Benefit nor result in the elimination or reduction of a benefit “protected” under Section 411(d)(6) of the Code. 

  
 72 

 9.2 Termination. Exelon Corporation may terminate or partially terminate the Plan through
resolutions adopted by Exelon Corporation’s Board of Directors. If the Plan is terminated or partially terminated, the assets of the Plan shall be allocated, subject to Section 9.3, as provided in Section 4044 of the Employee
Retirement Income Security Act of 1974 (as it may be from time to time amended or construed by any appropriate governmental agency or corporation), without subclasses. Any amount remaining after all fixed and contingent liabilities of the Plan have
been satisfied shall be returned to Exelon Corporation. Allocations under this Section shall be nonforfeitable. Except as otherwise required by law, the time and manner of distribution of the assets shall be determined by Exelon Corporation by
amendment to the Plan pursuant to Section 9.1. 
 9.3 Limitation on Benefits. The following provisions shall be effective with respect
to distributions made on or after May 14, 1990; distributions made prior to May 14, 1990 shall be subject to the restrictions described in Treas. Reg. §1.401-4(c). 

(a) In the event of Plan termination, the benefit payable to any Highly Compensated Employee shall be limited to a benefit that
is nondiscriminatory under Section 401(a)(4) of the Code. If payment of benefits is restricted in accordance with this Paragraph (a), assets in excess of the amount required to provided such restricted benefits shall become a part of the assets
available under Section 9.2 for allocation among Participants and beneficiaries of Participants whose benefits are not restricted under this Paragraph (a). 

(b) The restrictions of this Paragraph (b) shall apply prior to termination of the Plan to any Participant who is a Highly
Compensated Employee and who is one of the 25 highest paid employees or former employees of the Company and all Affiliates for any Plan Year. The annual payments made from the Plan on behalf of any such Participant shall be limited to an amount
equal to (1) the payments that would have been made under a single life annuity that is the Actuarial Equivalent of the sum of the Participant’s Accrued Benefit and any other benefits under the Plan (other than a social security
supplement) and (2) the payments that the Participant is entitled to receive under a social security supplement. 
 (c)
The restrictions in Paragraph (b) shall not apply: 
 (1) if, after the payment of benefits to or on behalf of such
Participant, the value of the Plan assets equals or exceeds 110 percent of the value of the current liabilities (within the meaning of Section 412(l)(7) of the Code); 

(2) if the value of the benefits payable to or on behalf of the Participant is less than one percent (1%) of the value of
current liabilities before distribution; or 
 (3) if the value of the benefits payable to or on behalf of the Participant
does not exceed $5,000. 

  
 73 

 ARTICLE X. Miscellaneous. 

10.1 Forfeitures. All forfeitures arising under the Plan shall be used as soon as possible to reduce the Company’s contributions and shall
not be applied to increase the benefits any person would otherwise receive under the Plan. 
 10.2 Mergers, Etc. No merger or consolidation
with, or transfer of any of the Plan’s assets or liabilities to, any other plan shall occur at any time unless each Participant and annuitant would (if the Plan had then terminated) receive a benefit immediately after the merger, consolidation,
or transfer which is equal to or greater than the benefit he would have been entitled to receive immediately before the merger, consolidation, or transfer (if the Plan had then terminated). 

10.3 Nonalienation of Benefits. Except (a) to the extent permitted by the Employee Retirement Income Security Act of 1974,
(b) pursuant to a qualified domestic relations order, (c) to the extent required to satisfy a Federal tax levy made pursuant to Section 6331 of the Code, or (d) effective as of January 1, 1997, pursuant to
Section 401(a)(13) of the Code, to the extent a judgment relates to the Participant’s conviction of a crime involving the Plan, or a judgment, order, decree or settlement agreement between the Participant and the Secretary of Labor or the
Pension Benefit Guaranty Corporation relates to a violation of part 4 of subtitle B of title I of ERISA, no benefit under this Plan may be voluntarily or involuntarily assigned or alienated. Notwithstanding the above, a Participant may authorize the
Administrator to deduct from benefit payments under the Plan up to 10% of each such payment as contributions to a Company political action committee. Any such authorization shall be revocable by the Participant at any time. 

10.4 Effect on Employment. This Plan shall not confer upon any person any right to be continued in the employment of the Company. 

10.5 Facility of Payment. If the Company deems any person incapable of receiving benefits to which he is entitled by reason of minority,
illness, infirmity, or other incapacity, it may direct that payment be made directly for the benefit of such person or to any person selected by the Company to disburse it, whose receipt shall be a complete acquittance therefor. Such payments shall,
to the extent thereof, discharge all liability of the Company and the party making the payment. 
 10.6 Lost Payees. If a Participant,
Spouse or other beneficiary to whom a benefit is payable under the Plan cannot be located following a reasonable effort to do so by the Administrator, such benefit shall be forfeited. Whether or not efforts to locate a Participant have previously
been made, the Administrator shall make reasonable efforts to locate the Participant (or the Spouse of a deceased Participant) during the one-year period preceding the Participant’s Required Beginning Date. If such efforts fail to locate the
Participant or Spouse, such Participant or Spouse shall be presumed dead as of the Required Beginning Date and any benefit payable to the Participant or Spouse shall be forfeited. In any case, if a claim for a forfeited benefit is subsequently filed
by the Participant, Spouse or beneficiary, such benefit shall be reinstated and paid in accordance with the appropriate provisions of the Plan. 

  
 74 

 10.7 Effective Date. The provisions of this instrument apply only to individuals who complete an
Hour of Service on or after the effective date stated under the title of the Plan on page one. The eligibility and benefits of any other person shall be determined under the Plan as in effect when he last separated from service except as expressly
provided with respect to him by amendment adopted thereafter; and except that the provisions of Section 2.10 (relating to rehire of Employees), Section 2.11 (relating to change in employment status or transfer to affiliate),
Section 4.6 (relating to maximum annuity), Section 4.12 (relating to benefit restrictions as a result of funding), Article VIII (relating to administration), Article IX (relating to amendment and termination of the Plan), and this Article
X (relating to miscellaneous provisions) shall be effective for all such persons. 
 10.8 Expenses. The expenses of the Trustee in the
administration of the Trust, including compensation, if any, to the Trustee for its services, shall be paid by the Company or the Employers. All costs and expenses incurred in the operation of the Trust, to the extent not described in the preceding
sentence, and all costs and expenses incurred in the operation of the Plan and the Trust, including, but not limited to, “direct expenses” incurred in administering the Plan and the Trust (including compensation paid to any employee of an
Employer or an Affiliate who is engaged in the administration of the Plan or the Trust), the expenses of the Administrator, the Investment Office and the Corporate Investment Committee, the fees of counsel and any agents for the Trustee, the
Administrator, the Investment Office or the Corporate Investment Committee, and the fees of investment managers that manage assets of the Trust shall be paid by the Trustee from the Trust in such proportion as the Investment Office, in its sole
discretion, shall determine, to the extent such expenses are not paid by the Employers and to the extent permitted under ERISA, Regulations and other applicable laws. Any such expenses that are borne by the Employers shall be paid out of their own
funds in such proportions as the Administrator shall determine. In the event that the Company or any other Employer advances money on behalf of the Trust for the payment of any expenses incurred in the operation of the Plan, the Trustee shall
reimburse the Company or such other Employer from the Trust for any amount so advanced, without interest or fees. 
 ARTICLE XI. Top-Heavy Provisions. 

11.1 Definitions. Whenever used in this Article: 

“Determination Date” means, with respect to any Plan Year, the last day of the preceding Plan Year. 

“Key Employee” means any Participant who, at any time during the Plan Year or any of the four preceding Plan Years, is an individual
described in Section 416(i) of the Code and the regulations thereunder. 
 “Permissive Aggregation Group” means a group of
qualified retirement plans maintained by the Company or any Affiliate, which group consists of the Required Aggregation group and any other plan or plans which, considered together with the Required Aggregation Group, meet the requirements of
Sections 401(a)(4) and 410 of the Code. 

  
 75 

 “Required Aggregation Group” means the group of qualified retirement plans maintained
by the Company or an Affiliate, including a frozen plan or a plan that has been terminated during the five-year period ending on the Determination Date, which group consists of this Plan, each other plan in which a Key Employee is a participant (or,
in the case of a terminated plan was a participant in such five-year period) and each other plan that enables any such plan to meet the requirements of Section 401(a)(4) or 410 of the Code, but only if such group includes this Plan. Otherwise,
the Required Aggregation Group consists of this Plan only. 
 “Top-Heavy Plan Year” means a Plan Year that begins after
December 31, 1983, in which the Plan is top-heavy. The Plan is top-heavy for a given Plan Year if for that Plan Year (1) the Required Aggregation Group is top-heavy, and (2) the Required Aggregation Group is not part of a Permissive
Aggregation Group that is not top-heavy. The Required Aggregation Group or a Permissive Aggregation Group (the “Group”) is top-heavy for a given Plan Year if the present value of the cumulative accrued benefits (or, the aggregate of the
accounts, in the case of a defined contribution plan included in such Group) of participants who are Key Employees exceeds 60% of the like amount determined for all participants in all plans included in such Group. For purposes of this definition:

 (a) the present value of the accrued benefit or the account of any participant shall be increased by the amount of all
plan distributions to such participant during the five year period ending on the Determination Date; provided that no such increase shall arise from any rollover contribution or plan-to-plan transfer from this Plan that is not initiated by the
participant or is made to another plan maintained by the Company or an Affiliate; 
 (b) the present value of the accrued
benefit or the account of a participant who has been a Key Employee but no longer is a Key Employee shall not be taken into account; 

(c) the present value of the accrued benefit or the account of any Participant who has not performed services for the Company
or an Affiliate at any time during the five-year period that ends on the Determination Date shall not be taken into account; 

(d) any rollover contribution or plan-to-plan transfer to this Plan that is initiated by a participant and made from a plan
that is not maintained by the Company or an Affiliate after December 31, 1983 shall not be taken into account; 
 (e)
the five year period referenced above shall be changed to a one year period for all distributions made on account of a severance from employment, death, or disability; and 

(f) the present value of accrued benefits shall be determined, effective January 1, 1987, under the method used for
accrual purposes for all plans maintained by the Company and all Affiliates if a single method is used by all such plans, or, otherwise, the slowest accrual method permitted under Section 411(b)(1)(C) of the Code. 

  
 76 

 11.2 Top-Heavy Operating Rules. Anything in the Plan to the contrary notwithstanding, the
following rules shall apply in a Top-Heavy Plan Year: 
 (a) For purposes of determining benefits under this Article XI,
“compensation” shall mean compensation as reported on Forms W-2 by the Company or any Affiliate for such Plan Year and the maximum amount of compensation of any Participant who is an Employee during such Plan Year shall be $150,000, or
such other amount as may apply to such Participant pursuant to Section 401(a)(17) of the Code and regulations issued thereunder. 

(b) For purposes of determining the maximum annuity in Section 4.6 for Plan years beginning before January 1, 2000,
“1.0” shall be substituted for “1.25”, wherever it appears. 
 (c) The Accrued Benefit which each
Participant who is an Employee but not a Key Employee under this Plan derives from contributions by the Company shall be increased by the amount necessary to cause the Accrued Benefits payable to each Participant in such year, when expressed as a
benefit payable annually in the form of a Single Life Annuity, to equal at least the required minimum benefit, where the required minimum benefit is the product of: 

(1) the average of the Participant’s compensation for the five consecutive Plan Years that yield the highest average,
disregarding Plan Years which begin before January 1, 1984, and Plan Years which are not Top-Heavy Plan Years, and 

(2) the lesser of: 

(A) 2 percent multiplied by the number of Vesting Years with the Company which were also Top-Heavy Plan Years and which were
completed after January 1, 1984; or 
 (B) 20 percent. 

For purposes of determining whether an increase in benefit accrual is required, all plans included in the Required Aggregation Group shall be treated as one
plan. 
 (d) Anything in the Plan to the contrary notwithstanding, in any Top-Heavy Plan Year, a Participant who does not
otherwise have a nonforfeitable right to 100% of his Accrued Benefit shall have a nonforfeitable right to a percentage of his Accrued Benefit in accordance with the following schedule: 

 

			
	Vesting Years	  	Nonforfeitable
Percentage
	 2
	  	20
	 3
	  	40
	 4
	  	60
	 5
	  	100

  
 77 

 In any Plan Year following the last Top-Heavy Plan Year, any Employee who is a Participant on the
last day of the last Top-Heavy Plan Year shall have at all times a vested interest in his Accrued Benefit as of that date determined under the schedule set forth above. In addition, within a reasonable period determined by the Company, any
Participant who has at least three Vesting Years to his credit on that date may elect to have his vested interest in his entire Accrued Benefit determined under the schedule set forth above. 

ARTICLE XII. Post Retirement Health Benefits. 

12.1 Eligibility 

(a) Effective December 1, 1994, post-retirement health befits may be paid under this Article, to the extent the Company
elects to fund benefits under this Article, to any Participant, who is receiving or has received pension benefits under this Plan, and if applicable, to the Spouse or dependents of such Participant; provided, however, that the Company may, in its
discretion, decide not to provide post-retirement health benefits under this Article for Key Employees (as defined in Section 11.1) and, if applicable, their Spouses and dependents. 

(b) In addition to satisfying the requirements of Subsection (a), any person claiming post-retirement health benefits under
this Plan must meet all applicable requirements imposed in the post-retirement health plans maintained by the Company. All determinations of benefit levels and eligibility for benefits shall be made pursuant to the terms of such post-retirement
health plans. 
 (c) The establishment of an account under this Article XII to provide payment for post-retirement health
benefits shall not obligate the Company to maintain its post-retirement health plans, and the Company shall retain the same ability to amend or terminate such post-retirement health plans as if this Article XII did not exist. 

Notwithstanding the foregoing, post-retirement health benefits shall not be available for any Power Team Employee. 

12.2 Benefits Provided. 

(a) Benefits under this Article shall include all health benefits provided by the post-retirement health plans maintained by
the Company, including payment of Medicare Part B premiums to the extent provided by such post-retirement health plans, to the extent such benefits are not otherwise provided by the Company. 

(b) Benefits under this Article shall be provided using any method or combination of methods as the Company shall deem
appropriate, including, but not limited to , purchase of insurance and the payment of premiums for such insurance, direct reimbursement of costs incurred by the provider of such benefits or reimbursement to the individual to whom such benefits were
provided. 

  
 78 

 (c) Benefits and coverage under this Article shall not be discriminatory in favor
of officers, shareholders, supervisory employees or highly compensated employees. 
 12.3 Establishment of Accounts. 

(a) A separate account shall be maintained with respect to the contributions to fund benefits under this Article. This account
is to be maintained for accounting purposes only. Funds accounted for in such account may be invested on a commingled basis with pension benefit contributions under this Plan without identification of which investments are allocable to each account,
provided that earnings on all Plan assets are allocated in a reasonable manner. 
 (b) If the Company elects to fund
post-retirement health benefits for Key Employees under this Article, as separate account shall be maintained for post-retirement health benefits payable to each Key Employee, his Spouse and dependents. Benefits under this Article shall be payable
to such Key Employee, Spouse and dependents only from such account. The separate account maintained under this Subsection (b) shall be a true separate account, and not maintained merely for accounting purposes. Commingling of assets held in
such account with any other Plan assets is not permitted. For purposes of Section 415 of the Code contributions allocated to any separate account under this Subsection (b) shall be treated as an annual addition to a defined contribution
plan. 
 12.4 Funding. 

(a) Contributions to provide benefits under this Article may be contributory or non-contributory, in accordance with the terms
of the post-retirement health plans maintained by the Company. 
 (b) Amounts contributed to fund post-retirement health
benefits shall be reasonable and ascertainable. The total amount contributed to fund post-retirement health benefits under this Article shall not exceed the cost of providing such benefits. The total cost of providing such benefits shall be
determined in accordance with a generally accepted actuarial method selected by the Company which is reasonable in view of the provisions and coverage of the Plan, the funding medium and other relevant considerations, including, but not limited to,
applicable Treasury regulations. For purposes of determining the cost of providing post-retirement health benefits, the actuarial method may take into account reasonable projected increases in the cost of providing health benefits. Forfeitures, if
any, under this Article shall be applied as soon as possible to reduce employer contributions to fund benefits under this Article. 

(c) Post-retirement health benefits provided under this Article, when added to life insurance protection provided under the
Plan, shall be incidental and subordinate to pension benefits provided under the Plan. For purposes of this Article, post-retirement health benefits shall be considered incidental and subordinate if the aggregate of the contributions for
post-retirement health benefits provided under this Article plus the contributions for life insurance protection under this Plan does not exceed 25 percent of the total contributions to the Plan (other than for past service credit) made on or after
December 1, 1994. 

  
 79 

 (d) Until the satisfaction of all liabilities to be provided under this Article,
neither amounts contributed to fund post-retirement health benefits under this Article nor earnings thereon shall be used for or diverted to any purpose other than providing such benefits or payment of necessary or appropriate expenses attributable
to the administration of post-retirement health accounts under this Article. Any amounts contributed to fund medical benefits under this Article remaining in a post-retirement health account after the satisfaction of all liabilities arising under
this Article must be returned to the Company. 
 (e) Nothing in this Article shall obligate the Company to pay benefits
described in Section 12.2 to the extent those benefits exceed assets contributed to the Fund to provide post-retirement health benefits under this Article. Furthermore, nothing in this Article shall imply that amounts contributed to the Fund to
provide pension or other benefits (other than post-retirement health benefits) available under the Plan will be used to provide post-retirement health benefits under this Article. The Company may, in its discretion, fund all or any part of the
benefits described in Section 12.2 from other sources or may pay such benefits out of its general assets as the benefits become payable. 

(f) If in any proceeding subsequent to December 1, 1994, under Section 1308 of the Pennsylvania Public Utility Code,
the Company is not permitted to fully recover in rates the contributions made to the separate account maintained to fund benefits under this Article, the Company, at its discretion, may elect to defer or discontinue funding the benefits under this
Article. 

  
 80 

 IN WITNESS WHEREOF, the Company has caused this instrument to be executed by its duly authorized
officer on this          day of December, 2012. 
  

			
	EXELON CORPORATION
		
	By 	 	 
		 	 Sr. Vice President &
 Chief Human
Resources Officer

  

	
	ATTEST:
	   

	
	Title
                                         
                               

  
 81 

 SERVICE ANNUITY PLAN 

APPENDIX A 
 Actuarial equivalence
under this Plan shall mean a benefit of equivalent value when computed using a 7% interest rate and the mortality tables attached to the Plan as Exhibit A (for pensioners) and B (for beneficiaries, if applicable), with such exceptions as
specifically set forth in the Plan. 
 For distributions on and after December 1, 2012, the lump sum Actuarial Equivalent of a
Participant’s Accrued Benefit for purposes of Section 5.6 only shall be determined using (i) the interest rate used shall be the interest rate as defined in Section 417(e)(3)(C) of the Code for the fifth month (or, if more
favorable to the recipient of a lump sum payment between December 1, 2012 and December 1, 2013), the second month) preceding the calendar year in which such distribution is made or commences and (ii) the mortality table shall be the
mortality table specified by the Commissioner of the Internal Revenue Service for purposes of Section 417(e)(3) of the Code as in effect on the first day of the Plan Year in which the Benefit Commencement Date occurs. For distributions on or
after January 1, 2008 and on or before November 30, 2012, the lump sum Actuarial Equivalent of a Participant’s Accrued Benefit for purposes of Section 5.6 shall be determined by using (i) the interest rate as defined in
Section 417(e)(3)(C) of the Code for the second month preceding the calendar year in which such distribution is made or commences and (ii) the mortality table specified by the Commissioner of the Internal Revenue Service for purposes of
Section 417(e)(3) of the Code as in effect on the first day of the Plan Year in which the Benefit Commencement Date occurs. 
 For
distributions on or after January 1, 2000 and on or before December 31, 2007, the lump sum Actuarial Equivalent of a Participant’s Accrued Benefit for purposes of Section 5.6 shall be determined using the annual rate of interest
on 30-year Treasury securities as specified by the Commissioner of the Internal Revenue Service pursuant to Section 417(e)(3)(A) of the Code and regulations issued thereunder for the second full calendar month preceding the first day of the
Plan Year containing the date of distribution, and the mortality table shall be the mortality table prescribed by the Commissioner of Internal Revenue Service pursuant to Section 417(e)(3)(A) of the Code on the date as of which the single sum
payment is being determined, if the use of such assumptions would result in a greater benefit. 
 For the period beginning on or after
January 1, 2000, and ending on or before December 31, 2001, and ending on the date of adoption of this amendment and restatement, the lump sum Actuarial Equivalent of a Participant’s Accrued Benefit for purposes of Section 5.6
shall be determined on the basis of the assumptions which would be used as of the first day of the Plan Year containing the date of distribution by the Pension Benefit Guaranty Corporation for purposes of determining the present value of a lump sum
distribution upon plan termination, if the use of such assumptions would result in a greater benefit. 

 APPENDIX B 

MINIMUM DISTRIBUTION INCIDENTAL BENEFIT TABLE 
  

					
	 Excess if Age of Participant
 over Age of
Beneficiary
	  	Applicable
Percentage	 
	 10 years or less
	  	 	100	% 
	 11
	  	 	96	% 
	 12
	  	 	93	% 
	 13
	  	 	90	% 
	 14
	  	 	87	% 
	 15
	  	 	84	% 
	 16
	  	 	82	% 
	 17
	  	 	79	% 
	 18
	  	 	77	% 
	 19
	  	 	75	% 
	 20
	  	 	73	% 
	 21
	  	 	72	% 
	 22
	  	 	70	% 
	 23
	  	 	68	% 
	 24
	  	 	67	% 
	 25
	  	 	66	% 
	 26
	  	 	64	% 
	 27
	  	 	63	% 
	 28
	  	 	62	% 
	 29
	  	 	61	% 
	 30
	  	 	60	% 
	 31
	  	 	59	% 
	 32
	  	 	59	% 
	 33
	  	 	58	% 
	 34
	  	 	57	% 
	 35
	  	 	56	% 
	 36
	  	 	56	% 
	 37
	  	 	55	% 
	 38
	  	 	55	% 
	 39
	  	 	54	% 
	 40
	  	 	54	% 
	 41
	  	 	53	% 
	 42
	  	 	53	% 
	 43
	  	 	53	% 
	 44 and greater
	  	 	52	% 

 SCHEDULE A – RETIREMENT FACTORS 

 

					
	 ENHANCED AGE AT BENEFIT

COMMENCEMENT DATE
	  	ENHANCED
RETIREMENT FACTORS	 
	 50
	  	 	80	% 
	 51
	  	 	84	% 
	 52
	  	 	88	% 
	 53
	  	 	92	% 
	 54
	  	 	96	% 
	 55
	  	 	100	% 
	 56
	  	 	100	% 
	 57
	  	 	100	% 
	 58
	  	 	100	% 
	 59
	  	 	100	% 
	 60
	  	 	100	% 
	 61
	  	 	100	% 
	 62
	  	 	100	% 
	 62
	  	 	100	% 
	 63
	  	 	100	% 
	 64
	  	 	100	% 
	 65
	  	 	100	% 

 The foregoing factors will be interpolated based on the Eligible Participant’s Age rounded to the nearest month. 

 SCHEDULE B – ENHANCED DEFERRED VESTED PENSION FACTORS 

 

																																															
	 ACTUAL AGE VESTED BENEFITS BEGIN
	 
	ENHANCED AGE AT TERMINATION	  	 	  	50	 	 	51	 	 	52	 	 	53	 	 	54	 	 	55	 	 	56	 	 	57	 	 	58	 	 	59	 	 	>=60	 
		  	>=49	  	 	70.0	% 	 	 	73.0	% 	 	 	76.0	% 	 	 	79.0	% 	 	 	82.0	% 	 	 	85.0	% 	 	 	88.0	% 	 	 	91.0	% 	 	 	94.0	% 	 	 	97.0	% 	 	 	100.0	% 
		  	48	  	 	69.0	% 	 	 	72.1	% 	 	 	75.2	% 	 	 	78.3	% 	 	 	81.4	% 	 	 	84.5	% 	 	 	87.6	% 	 	 	90.7	% 	 	 	93.8	% 	 	 	96.9	% 	 	 	100.0	% 
		  	47	  	 	68.0	% 	 	 	71.2	% 	 	 	74.4	% 	 	 	77.6	% 	 	 	80.8	% 	 	 	84.0	% 	 	 	87.2	% 	 	 	90.4	% 	 	 	93.6	% 	 	 	96.8	% 	 	 	100.0	% 
		  	46	  	 	67.0	% 	 	 	70.3	% 	 	 	73.6	% 	 	 	76.9	% 	 	 	80.2	% 	 	 	83.5	% 	 	 	86.8	% 	 	 	90.1	% 	 	 	93.4	% 	 	 	96.7	% 	 	 	100.0	% 
		  	45	  	 	66.0	% 	 	 	69.4	% 	 	 	72.8	% 	 	 	76.2	% 	 	 	79.6	% 	 	 	83.0	% 	 	 	86.4	% 	 	 	89.8	% 	 	 	93.2	% 	 	 	96.6	% 	 	 	100.0	% 
		  	>45	  	 
 	Reverts to Standard Deferred Vested Pension Plan factors under the
regular terms of the Service Annuity Plan.	  
  

 The foregoing factors will be interpolated on the Eligible Participant’s Age rounded to the nearest months.Exelon Corporation Employee Savings Plan

 Exhibit 10.6 

EXELON CORPORATION 
 EMPLOYEE
SAVINGS PLAN 
 Amended and Restated Effective as of January 1, 2013 

 EXELON CORPORATION EMPLOYEE SAVINGS PLAN 

TABLE OF CONTENTS 
  

					
	 	  	Page	 
	 ARTICLE 1 TITLE, PURPOSE AND EFFECTIVE DATES
	  	 	1	  
		
	 ARTICLE 2 DEFINITIONS
	  	 	1	  
		
	 ARTICLE 3 PARTICIPATION
	  	 	7	  
		
	 Section 3.1.     Eligibility for Participation
	  	 	7	  
	 Section 3.2.     Applications for Before-Tax Contributions and After-Tax Contributions
	  	 	8	  
	 Section 3.3.     Transfer to Affiliates
	  	 	11	  
		
	 ARTICLE 4 EMPLOYER CONTRIBUTIONS
	  	 	11	  
		
	 Section 4.1.     Before-Tax Contributions
	  	 	11	  
	 Section 4.2.     402(g) Annual Limit on Before-Tax Contributions
	  	 	15	  
	 Section 4.3.     Employer Matching Contributions
	  	 	18	  
	 Section 4.4.     Limitations on Contributions for
Highly-Compensated Eligible Employees
	  	 	21	  
	 Section 4.5.     Limitation on Employer Contributions
	  	 	30	  
		
	 ARTICLE 5 EMPLOYEE CONTRIBUTIONS
	  	 	31	  
		
	 Section 5.1.     After-Tax Contributions
	  	 	31	  
	 Section 5.2.     Rollover Contributions
	  	 	32	  
	 Section 5.3.     Special Accounting Rules for Rollover Contributions
	  	 	34	  
		
	 ARTICLE 6 TRUST AND INVESTMENT FUNDS
	  	 	34	  
		
	 Section 6.1.     Trust
	  	 	34	  
	 Section 6.2.     Investment Funds
	  	 	35	  
		
	 ARTICLE 7 PARTICIPANT ACCOUNTS AND INVESTMENT ELECTIONS
	  	 	35	  
		
	 Section 7.1.     Participant Accounts and Investment Elections
	  	 	35	  
	 Section 7.2.     Allocation of Net Income of Trust Fund and Fluctuation in Value of Trust Fund
Assets
	  	 	37	  
	 Section 7.3.     Allocations of Contributions Among Participants’ Accounts
	  	 	39	  
	 Section 7.4.     Limitations on Allocations Imposed by Section 415 of the Code
	  	 	40	  
	 Section 7.5.     Correction of Error
	  	 	42	  
		
	 ARTICLE 8 WITHDRAWALS AND DISTRIBUTIONS
	  	 	42	  
		
	 Section 8.1.     Withdrawals and Distributions Prior to Termination of Employment
	  	 	42	  
	 Section 8.2.     Loans to Participants
	  	 	48	  
	 Section 8.3.     Distributions Upon Termination of Employment
	  	 	51	  
	 Section 8.4.     Time of Distribution
	  	 	55	  

  
 (i) 

					
	 Section 8.5.     Designation of Beneficiary
	  	 	57	  
	 Section 8.6.     Distributions to Minor and Disabled Distributees
	  	 	59	  
	 Section 8.7.     “Lost” Participants and Beneficiaries
	  	 	59	  
	 Section 8.8.     Death Benefits Under USERRA
	  	 	60	  
		
	 ARTICLE 9 PARTICIPANTS’ STOCKHOLDER RIGHTS
	  	 	60	  
		
	 Section 9.1.     Voting Shares of Common Stock
	  	 	60	  
	 Section 9.2.     Tender Offers
	  	 	61	  
		
	 ARTICLE 10 SPECIAL PARTICIPATION AND DISTRIBUTION RULES RELATING TO REEMPLOYMENT OF TERMINATED EMPLOYEES AND EMPLOYMENT BY
RELATED ENTITIES
	  	 	63	  
		
	 Section 10.1.   Change of Employment Status
	  	 	63	  
	 Section 10.2.   Reemployment of an Eligible Employee Whose Employment Terminated Prior to His or Her Becoming a
Participant
	  	 	63	  
	 Section 10.3.   Reemployment of a Terminated Participant
	  	 	64	  
	 Section 10.4.   Employment by an Affiliate
	  	 	64	  
	 Section 10.5.   Leased Employees
	  	 	64	  
	 Section 10.6.   Reemployment of Veterans
	  	 	65	  
		
	 ARTICLE 11 ADMINISTRATION
	  	 	68	  
		
	 Section 11.1.   The Administrator, the Investment Office and the Corporate Investment Committee
	  	 	68	  
	 Section 11.2.   Claims Procedure
	  	 	72	  
	 Section 11.3.   Procedures for Domestic Relations Orders
	  	 	74	  
	 Section 11.4.   Notices to Participants, Etc.
	  	 	76	  
	 Section 11.5.   Notices to Administrator
	  	 	76	  
	 Section 11.6.   Records
	  	 	76	  
	 Section 11.7.   Reports of Trustee and Accounting to Participants
	  	 	77	  
	 Section 11.8.   Electronic Media
	  	 	77	  
		
	 ARTICLE 12 PARTICIPATION BY OTHER EMPLOYERS
	  	 	77	  
		
	 Section 12.1.   Adoption of Plan
	  	 	77	  
	 Section 12.2.   Withdrawal from Participation
	  	 	78	  
	 Section 12.3.   Company as Agent for Employers
	  	 	78	  
		
	 ARTICLE 13 CONTINUANCE BY A SUCCESSOR
	  	 	78	  
		
	 ARTICLE 14 MISCELLANEOUS
	  	 	79	  
		
	 Section 14.1.   Expenses
	  	 	79	  
	 Section 14.2.   Non-Assignability
	  	 	80	  
	 Section 14.3.   Employment Non-Contractual
	  	 	82	  

  
 (ii) 

					
	 Section 14.4.   Limitation of Rights
	  	 	82	  
	 Section 14.5.   Merger or Consolidation with Another Plan
	  	 	82	  
	 Section 14.6.   Gender and Plurals
	  	 	82	  
	 Section 14.7.   Applicable Law
	  	 	83	  
	 Section 14.8.   Severability
	  	 	83	  
	 Section 14.9.   No Guarantee
	  	 	83	  
	 Section 14.10. Statute of Limitations for Actions under the Plan
	  	 	83	  
	 Section 14.11. Forum for Legal Actions under the Plan
	  	 	84	  
	 Section 14.12. Legal Fees
	  	 	84	  
		
	 ARTICLE 15 TOP-HEAVY PLAN
REQUIREMENTS
	  	 	85	  
		
	 Section 15.1.   Top-Heavy Plan Determination
	  	 	85	  
	 Section 15.2.   Definitions and Special Rules
	  	 	85	  
	 Section 15.3.   Minimum Contribution for Top-Heavy Years
	  	 	86	  
		
	 ARTICLE 16 AMENDMENT, ESTABLISHMENT OF SEPARATE PLAN AND TERMINATION
	  	 	87	  
		
	 Section 16.1.   Amendment
	  	 	87	  
	 Section 16.2.   Establishment of Separate Plan
	  	 	88	  
	 Section 16.3.   Termination and Distributions upon Termination of the Plan
	  	 	89	  
	 Section 16.4.   Trust Fund to Be Applied Exclusively for Participants and Their Beneficiaries
	  	 	90	  
		
	 SUPPLEMENT I Transfers from Other Plans
	  	 	I-1	  
		
	 SUPPLEMENT II Elective Transfers Between This Plan and Plans of Affiliates or the TXU 401(k) Plan
	  	 	II-1	  
		
	 SUPPLEMENT III Merger of Certain AmerGen Plans into this Plan
	  	 	III-1	  
		
	 SUPPLEMENT IV Merger of New England Plan into this Plan
	  	 	IV-1	  
		
	 SUPPLEMENT V Transfers from the Exelon Corporation 401(k) Profit Sharing Plan No. 2
	  	 	V-1	  

  
 (iii) 

 ARTICLE 1 

TITLE, PURPOSE AND EFFECTIVE DATES 

The title of this Plan shall be the “Exelon Corporation Employee Savings Plan.” This Plan is an amendment and restatement of the
Plan as in effect on December 31, 2012, and shall be effective January 1, 2013 in respect of Participants whose employment terminates on or after such date, provided, however, that any provision that specifies a different effective
date shall be effective as of such date; and provided, further that, the provisions of Article 9 (relating to participants’ stockholders rights), Article 10 (relating to special participation and distribution rules relating to
reemployment of terminated employees and employment by related entities), Article 11 (relating to administration), Article 14 (relating to miscellaneous provisions) and Article 16 (relating to amendment and termination of the Plan) shall be
effective for all such persons. 
 This Plan is designated as a “profit sharing plan” within the meaning of section 1.401-1(a)(2)(ii) of the Regulations; and is also designated as an ERISA section 404(c) Plan within the meaning of section 2550.404c-1 of the Regulations. In addition, the portion of the Plan invested in the
Employer Stock Fund described in Section 6.2 is designated as an “employee stock ownership plan” within the meaning of section 4975(e)(7) of the Code and, as such, is designed to invest primarily in “qualifying employer
securities” as defined in section 4975(e)(8) of the Code. 
 ARTICLE 2 

DEFINITIONS 
 As used
herein, the following words and phrases shall have the following respective meanings when capitalized: 
 (1) Administrator. The
Company acting through its Director, Employee Benefit Plans & Programs, or such other person or committee appointed pursuant to Section 11.1 (relating to the Administrator, the Investment Office and the Corporate Investment Committee).

  
 1 

 (2) Affiliate. (a) A corporation that is a member of the same controlled group of
corporations (within the meaning of section 414(b) of the Code) as an Employer, (b) a trade or business (whether or not incorporated) under common control (within the meaning of section 414(c) of the Code) with an Employer, (c) any
organization (whether or not incorporated) that is a member of an affiliated service group (within the meaning of section 414(m) of the Code) that includes an Employer, a corporation described in clause (a) of this subdivision or a trade or
business described in clause (b) of this subdivision or (d) any other entity that is required to be aggregated with an Employer pursuant to Regulations promulgated under section 414(o) of the Code. 

(3) After-Tax Contributions. Contributions made by a Participant pursuant to Section 5.1. 

(4) After-Tax Contributions Account. The account established pursuant to Section 7.1 to which shall be credited (i) a
Participant’s After-Tax Contributions, (ii) any after-tax contributions transferred to the Plan from the PECO Energy Company Employee Savings Plan (including any after-tax contributions transferred to such plan from the Philadelphia
Electric Company Tax Reduction Act Stock Ownership Plan) on behalf of such Participant and (iii) earnings (or losses) thereon. 
 (5)
Before-Tax Contributions. Contributions made on behalf of a Participant pursuant to Section 4.1. The term “Before-Tax Contributions” includes Designated Roth Contributions, if any, including Catch-Up Contributions. 

(6) Before-Tax Contributions Account. The account established pursuant to Section 7.1 to which shall be credited (i) a
Participant’s Before-Tax Contributions other than Catch-Up Contributions, (ii) any before-tax contributions transferred to the Plan from the PECO Energy Company Employee Savings Plan on behalf of such Participant and (iii) earnings
(or losses) thereon. 
 (7) Beneficiary. The person or persons entitled under Section 8.5 to receive benefits in the event of
the death of a Participant. For any period in which the Plan is not an “ERISA section 404(c) Plan” as defined in the Regulations under section 404(c) of ERISA, each Beneficiary shall be a “named fiduciary” within the meaning of
section 402(a)(1) of ERISA for the sole purpose of directing the Trustee with respect to the exercise of shareholder rights pursuant to Article 9 (relating to Participants’ stockholder rights). 

(8) Catch-Up Contributions. Before-Tax Contributions made pursuant to paragraph (d) of Section 4.1 (relating to Catch-Up
Contributions) by a Participant who has attained age 50 before the close of the relevant Plan Year. 
 (9) Catch-Up Contributions
Account. The account established pursuant to Section 7.1 for each Participant who has attained age 50 to which shall be credited a Participant’s Catch-Up Contributions 

(10) CEG. Constellation Energy Group, Inc. and any of its affiliates that was an affiliate immediately before the Effective Time (as
such term is defined in the Merger Agreement). 

  
 2 

 (11) Code. The Internal Revenue Code of 1986, as amended. 

(12) Common Stock. The common stock, without par value, of Exelon Corporation. 

(12) Company. Exelon Corporation, a Pennsylvania corporation, or any successor to such corporation that adopts the Plan pursuant to
Article 13 (relating to continuance by a successor). 
 (13) Compensation. The normal base pay under the applicable Exelon East or
West payroll of an Employee from an Employer for personal services rendered, including (i) nuclear license premiums for management employees, (ii) meter readers’ bonuses, (iii) payments attributable to worker’s compensation
received from an Employer, (iv) taxable payments received by an employee under the Exelon Corporation Disability Benefit Plan, (v) solely for employees who are employed by Exelon Boston Services LLC who are represented by Local 369 of the
Utility Workers Union of America, AFL-CIO, overtime pay, (vi) solely for employees who are represented by IBEW Local Union 15 and covered under the collective bargaining agreement between Commonwealth Edison Company and IBEW Local Union 15,
overtime pay, but only amounts paid with respect to hours worked in excess of an Employee’s normally scheduled hours, (vii) effective January 1, 2009, differential wage payments (as defined in section 3401(h) of the Code), and
excluding (i) salary continuation or lump sum payments under a severance benefit plan, or other severance arrangement, of an Employer, (ii) bonuses or incentive awards (other than meter readers’ bonuses), (iii) overtime pay for
management employees, (iv) shift premiums, (v) fringe benefits, (vi) other extraordinary payments and (vii) payments made in a form other than cash, but without reduction on account of the Employee’s election to have his or
her pay reduced pursuant to a qualified cash or deferred arrangement described in section 401(k) of the Code (including any such election to make a Designated Roth Contribution), a qualified transportation fringe benefit program described in section
132(f) of the Code or a cafeteria plan described in section 125 of the Code. For purposes of the preceding sentence, the normal base pay of an Employee who works and is compensated based on a shift schedule other than a basic work week consisting of
five regularly scheduled eight-hour work days shall be computed by multiplying the number of regularly scheduled basic work hours for which such Employee is paid by his or her basic hourly rate, determined without regard to any premium payments made
at an overtime rate for such work. An Employee’s “compensation” (within the meaning of section 415 of the Code) for any Plan Year in excess of the applicable dollar limitation contained in Section 401(a)(17) of the Code (as
adjusted for changes in the cost of living pursuant to section 401(a)(17) of the Code), shall be not be taken into account for any purpose under the Plan. Notwithstanding the preceding, effective January 1, 2003, normal base pay shall also
include lump sum merit increases to base pay. Notwithstanding the foregoing, an amount classified as Compensation under the preceding paragraphs shall not be Compensation for purposes of the Plan if such amount is paid to an Employee after the
Employee’s severance from employment unless (i) such amount is regular compensation for services during the Employee’s regular working hours or compensation for services outside the Employee’s regular working hours and
(ii) such amount is paid on or before the later of (A) 2 1⁄2 months after the Employee’s severance from employment and (B) the last day of
the Plan Year during which the Employee’s severance from employment occurs. Finally, in no event shall Compensation for purposes of this Plan include any amount that is not “compensation” within the meaning of section 415(c)(3) of the
Code and section 1.415(c)-2 of the Regulations. 

  
 3 

 (14) Corporate Investment Committee. The Company acting through the Committee consisting
of the executives or other persons designated from time to time in the charter of such Committee. 
 (15) Designated Roth
Contributions. Before-Tax Contributions designated as Roth contributions pursuant to Section 4.2(e) (relating to Untaxed Contributions and Designated Roth Contributions) by a Participant. 

(16) Designated Roth Contributions Account. The account established pursuant to Section 7.1 for each Participant to which shall be
credited all Designated Roth Contributions made on behalf of such Participant pursuant to Section 4.2(c) for Plan Years beginning on or after January 1, 2006 and earnings (or losses) thereon for each Participant who is not represented by
IBEW Local Union 15 and covered under the collective bargaining agreement between Commonwealth Edison Company and IBEW Local Union 15 (“Local 15 Member”) and (b) for Plan Years beginning on or after January 1, 2009 and earning
(or losses) thereon for each Participant who is a Local 15 Member. 
 (17) Disability. A physical or mental condition which, in the
judgment of the Administrator, based upon medical reports and other evidence satisfactory to the Administrator, permanently prevents a Participant from satisfactorily performing his or her usual duties or the duties of such other position available
to him and for which he is qualified by reason of his or her training, education or experience. 
 (18) Effective Date.
January 1, 2010. 
 (19) Eligible Employee. An Employee other than (i) an Employee the terms of whose employment are
subject to a collective bargaining agreement that does not provide for participation in this Plan, (ii) an Employee on an unpaid leave of absence (except as required by applicable law respecting Military Service), (iii) an Employee paid on
the temporary payroll of an Employer who has never completed 1,000 Hours of Service in any period of twelve consecutive months beginning with the Employee’s date of employment or any anniversary thereof, (iv) an individual rendering
services to an Employer who is not on the payroll of any Employer, (v) as of the Effective Time, an individual who was employed immediately prior to the Effective Time (as such term is defined in the Merger Agreement) at CEG or a facility owned
immediately before the Effective Time by CEG and (vi) an individual who is newly employed on or after the Effective Time (as such term is defined in the Merger Agreement) at a facility owned immediately before the Effective Time by CEG. It is
expressly intended that an individual rendering services to an Employer pursuant to any of the following agreements shall be excluded from Plan participation pursuant to clause (iv) of this subdivision even if a court or administrative agency
determines that such individual is an Employee: (a) an agreement providing that such services are to be rendered as an independent contractor, (b) an agreement with an entity, including a leasing organization within the meaning of
section 414(n)(2) of the Code, that is not an Employer or (c) an agreement that contains a waiver of participation in the Plan. 

(20) Employee. An individual whose relationship with an Employer is, under common law, that of an employee. 

  
 4 

 (21) Employer. The Company and any other Affiliate set forth on Appendix I hereto that,
with the consent of the Company elects to participate in the Plan in the manner described in Article 12 either with respect to all Employees or a particular group of Employees of such Affiliate and any successor Affiliate that adopts the Plan
pursuant to Article 13. If any entity described in the preceding sentence withdraws from participation in the Plan pursuant to Section 12.2, such entity shall thereupon cease to be an Employer. 

(22) Employer Matching Contributions. Contributions made by an Employer pursuant to Section 4.3. 

(23) Employer Matching Contributions Account. The account established pursuant to Section 7.1 to which shall be credited
(i) any Employer Matching Contributions made on behalf of a Participant, (ii) any employer matching contributions transferred to the Plan from the PECO Energy Company Employee Savings Plan (including any employer matching contributions
transferred to such plan from the Philadelphia Electric Company Tax Reduction Act Stock Ownership Plan) on behalf of such Participant and (iii) earnings (or losses) thereon. 

(24) ERISA. The Employee Retirement Income Security Act of 1974, as amended. 

(25) Hour of Service. Each hour for which an Employee is directly or indirectly compensated by, or entitled to receive compensation
from, an Employer. For purposes of this subdivision, compensation shall mean the total earnings paid, directly or indirectly, to the Employee by an Employer, including any back pay, irrespective of mitigation of damages, either awarded to the
Employee or agreed to by an Employer. The computation of Hours of Service and the periods to which Hours of Service are credited shall be determined under uniform rules adopted by the Administrator in accordance with Department of Labor regulations §2530.200b-2(b), (c) and (f). 
 (26) Investment Office. The Company acting through the
Exelon Investment Office. 
 (27) Merger Agreement. That Agreement and Plan of Merger, dated as of April 28, 2011, by and among
Exelon Corporation, Bolt Acquisition Corporation and Constellation Energy Group, Inc. 
 (28) Military Service. The performance of
duty on a voluntary or involuntary basis in a “uniformed service” (as defined below) under competent authority of the United States government and includes active duty, active duty for training, initial active duty for training, inactive
duty training, full-time National Guard duty, and a period for which a person is absent from employment for the purpose of an examination to determine the fitness of the person to perform any such duty. For purposes of the preceding sentence, the
term “uniformed service” means the Armed Forces, the Army National Guard and the Air National Guard when engaged in active duty for training, inactive duty training, or full-time National Guard duty, the commissioned corps of the Public
Health service, and any other category of persons designated by the President of the United States in time of war or emergency. 
 (29)
Participant. An Eligible Employee who satisfies the conditions set forth in Section 3.1 (relating to eligibility for Participation). An individual shall cease to be a Participant upon the complete distribution, or transfer of his or her
account under the Plan. For any period in which the 

  
 5 

 
Plan is not an “ERISA section 404(c) Plan” as defined in Regulations under section 404(c) of ERISA, each Participant shall be a “named fiduciary” within the meaning of section
402(a)(1) of ERISA for the sole purpose of directing the Trustee with respect to the exercise of shareholder rights pursuant to Article 9 (relating to Participants’ stockholder rights). 

(30) Plan. The plan herein set forth, and as from time to time amended. 

(31) Plan Year. The twelve-month period beginning on each January 1. 

(32) Qualified Reservist. The term “Qualified Reservist” shall mean an individual who is (i) a member of a reserve
component (as defined in chapter 1 of title 37, United States Code) and (ii) ordered or called to active duty for a period in excess of 179 days or for an indefinite period, after September 11, 2001. 

(33) Regulations. Written final or temporary promulgations of the Department of Labor construing Title I of ERISA or the Internal
Revenue Service construing the Code. 
 (34) Rollover Account. The account established pursuant to Section 7.1 to which shall be
credited (i) any rollover contribution made by or on behalf of an Eligible Employee or a Participant, (ii) any rollover contribution transferred to the Plan from the PECO Energy Company Employee Savings Plan on behalf of such Participant
and (iii) earnings (or losses) thereon. 
 (35) Spouse. The individual who is a husband or wife of a Participant as the result
of a legal union between one man and one woman, within the meaning of the Defense of Marriage Act. 
 (36) Termination Date.
(a) The date an Employee quits, retires, is discharged from employment by an Employer or dies, (b) the date the Employee’s employer ceases to be an Employer on account of its sale to a party or parties that do not qualify as an
Affiliate of any Employer, (c) the first anniversary of the Employee’s first date of absence from employment by an Employer for any other reason, except as provided in clause (d) or (e) below, (d) in the case of an Employee
who is absent from employment for maternity or paternity reasons, the second anniversary of the first date of such absence or (e) the last date following a period of Military Service as of which the Employee has reemployment rights under
applicable law. For purposes of this subdivision, an absence from employment for maternity or paternity reasons means an absence (1) by reason of the pregnancy of the Employee, (2) by reason of the birth of a child of the Employee,
(3) by reason of the placement of a child with the Employee in connection with the adoption of such child by such Employee or (4) for purposes of caring for such child for a period beginning immediately following such birth or placement.
Notwithstanding the foregoing sentences, an Employee’s absence from employment for maternity or paternity reasons or for Military Service shall not be considered in determining the Employee’s Termination Date unless the Employee, upon the
Administrator’s request, provides certification that the leave was taken for one of the reasons enumerated in the preceding sentence. 

(37) Trust. The trust created by agreement between the Company and the Trustee, as from time to time amended. 

(38) Trust Fund. All money and property of every kind of the Trust held by the Trustee pursuant to the terms of the Trust agreement.

  
 6 

 (39) Trustee. The trustee that executes the Trust instrument provided for in Article 6, or
any successor trustee or, if there is more than one trustee acting at any time, all of such trustees collectively. 
 (40) Untaxed
Contributions. Before-Tax Contributions not designated as Designated Roth Contributions pursuant to Section 4.2(e) (relating to Untaxed Contributions and Designated Roth Contributions) by a Participant. 

(41) Untaxed Contributions Account. The account established pursuant to Section 7.1 for each Participant to which shall be
credited (a) all Before-Tax Contributions that are made on behalf of the Participant pursuant to Section 4.2 for Plan Years beginning prior to January 1, 2006 with respect to a Participant who is not a Local 15 Member and for Plan
Years beginning before January 1, 2009 with respect to a Participant who is a Local 15 Member, (b) any before-tax contributions transferred to the Plan from the PECO Energy Company Employee Savings Plan on behalf of such Participant,
(c) all Before-Tax Contributions that are Untaxed Contributions made pursuant to Section 4.2 for Plan Years beginning on or after January 1, 2006 with respect to a Participant who is not a Local 15 Member and for Plan Years beginning
before January 1, 2009 with respect to a Participant who is a Local 15 Member, and (d) earnings (or losses) thereon. 
 (42)
Valuation Date. Each business day, as determined by the Trustee, or such other days as the Administrator may designate. 
 (43)
VRU. The telephonic voice response unit designated by the Administrator, which may be used to make certain elections under the Plan. The VRU shall require each Participant, or Beneficiary, as the case may be, to provide such identification
data as may, from time to time, be required by the VRU. The Administrator shall cause to be kept such records of VRU activity as it shall deem necessary or appropriate, and such records shall constitute valid authorization of the elections made by
each Participant and Beneficiary for all purposes of the Plan and applicable Regulations. No written authorization shall be required from a Participant or Beneficiary after an election has been made by calling the VRU. 

ARTICLE 3 

PARTICIPATION 

Section 3.1. Eligibility for Participation. 

Each Eligible Employee who immediately before the Effective Date was a Participant in the Plan shall continue to be a Participant as of the
Effective Date. Each other Eligible Employee who is a member of a bargaining unit represented by IBEW Local Union 15 shall be eligible to become a Participant on the first day of the payroll period coinciding with or next following the date he or
she has completed three months of employment with an Employer (regardless of the 

  
 7 

 
number of Hours of Service actually performed). Each other Eligible Employee who is not a member of a bargaining unit represented by IBEW Local Union 15 shall be eligible to become a Participant
on the first day of the payroll period coinciding with or next following the date of his or her employment. 
 Section 3.2.
Applications for Before-Tax Contributions and After-Tax Contributions. 
 (a) Regular Payroll Before-Tax and After-Tax
Contributions. Each Eligible Employee who desires to commence Before-Tax Contributions or After-Tax Contributions shall make a request in the manner prescribed by the Administrator specifying the Employee’s chosen rate of Before-Tax
Contributions for each payroll period or his or her chosen rate of After-Tax Contributions for each payroll period, or both. Such request shall authorize the Employee’s Employer to reduce the Eligible Employee’s Compensation by the amount
of any such Before-Tax Contributions, to make regular payroll deductions of any such After-Tax Contributions or both, as the case may be. The request shall also specify the Employee’s investment elections pursuant to Section 7.1(b) and
shall evidence the Employee’s acceptance of and agreement to all provisions of the Plan. In addition, an Eligible Employee who is not a member of a bargaining unit represented by IBEW Local Union 15 on the date of his or her employment may
elect, in accordance with the provisions of this paragraph (a), to become a Participant on the first day of the payroll period coinciding with or next following such date. All requests to commence contributions pursuant to this paragraph
(a) shall be effective as of such time after the Administrator (or its delegate) receives such request as shall be established by the Administrator, provided, that all such requests shall be effective on the first day of a payroll period
commencing not more than 30 days after receipt thereof by the Administrator (or its delegate). 

  
 8 

 (b) Quarterly Incentive Award Before-Tax Contributions. With respect to quarterly
incentive awards earned prior to January 1, 2002, each Eligible Employee may request, in the manner prescribed by the Administrator, to reduce his or her compensation by an amount equal to 100 percent of any such quarterly incentive awards that
would otherwise be paid to such Participant; provided, however, that for the 2001 Plan Year, such reduction shall be available solely with respect to quarterly incentive awards payable on or after the later of (i) March 31, 2001 and
(ii) the first date thereafter which the Administrator determines is administratively practicable with respect to Employees of such Participant’s Employer. Before-Tax Contributions pursuant to this paragraph (b) shall be invested in
accordance with the Participant’s investment election under paragraph (a) of this Section 3.2 (or, if no such election is in effect, in accordance with an investment election made by such Participant in the manner prescribed by the
Administrator). 
 (c) Automatic Enrollment for Certain Employees. (i) Deemed Election of Default Before-Tax
Contributions. A Participant whose hire date is on or after April 6, 2009 and who does not make an election pursuant to paragraph (a) of this Section 3.2 to make Before-Tax Contributions or After-Tax Contributions shall be deemed
to have elected to make Before-Tax Contributions (“Default Before-Tax Contributions”) equal to 3 percent (“Default Percentage”) of his or her Compensation for each payroll period and to have his or her Employer reduce his or her
Compensation by the amount thereof. Such Participant’s Default Percentage will increase by 1 percent each Plan Year, beginning with the second Plan Year that begins after the Default Percentage first applies to the Participant, until it reaches
5 percent. The increase will be effective March 1 of each applicable Plan Year. Notwithstanding the foregoing, in the event a Participant’s initial Default Before-Tax Contribution occurs during the period commencing on December 1 and
ending the last day of February, the initial increase to such Participant’s Default Percentage shall commence on the March 1 of the calendar year following the first anniversary of the Participant’s initial Default Before-Tax
Contribution. The effective date of such Participant’s deemed election shall be 90 days after the Participant receives a notice of his or her rights and obligations under 

  
 9 

 
this paragraph (c)(i) (the “Automatic Enrollment Notice”). During the 90-day period after the Participant receives the Automatic Enrollment Notice, the Participant shall have an
opportunity to make an affirmative election to (1) not have any Default Before-Tax Contributions made on his or her behalf or (2) have Before-Tax Contributions made in a different amount or percentage of Compensation by giving direction to
the Administrator (or its delegate) in the manner prescribed by the Administrator. Any deemed election described in this paragraph (c)(i) shall be effective only with respect to Compensation not currently available to the Participant. Each
Participant whose hire date is on or after April 6, 2009 shall be a “covered employee” for purposes of section 1.414(w)-1(e)(3) of the Regulations, regardless of whether such Participant makes an affirmative election regarding
Before-Tax Contributions. Notwithstanding the foregoing, an Employee who on or after April 6, 2009 becomes eligible to participate in the Plan as a result of the Employee’s rehire by an Employer shall not be deemed to have made an election
automatically to have Before-Tax Contributions made on his or her behalf pursuant to this paragraph (c)(i) or deemed to be a “covered employee.” 

(ii) Withdrawal of Default Before-Tax Contributions. A covered employee deemed to elect Default Before-Tax Contributions pursuant to
paragraph (c)(i) may elect, no later than 90 days after the first payroll date that the first Default Before-Tax Contributions on behalf of the covered employee occurs, to receive a distribution equal to the amount of all such contributions
(adjusted for earnings and losses and reduced by any applicable fees) made with respect to the covered employee through the earlier of (1) the pay date for the second payroll period that begins after the covered employee’s withdrawal
request and (2) the first pay date that occurs after 30 days following the covered employee’s request. An election by a covered employee to withdraw Default Before-Tax Contributions pursuant to this paragraph (c)(ii) shall be deemed to be
an election by the covered employee, as of the date of the withdrawal election, to reduce his Before-Tax Contribution percentage to 0 percent (subject to any affirmative election by the covered employee to the contrary). 

  
 10 

 Section 3.3. Transfer to Affiliates. 

If a Participant is transferred from one Employer to another Employer or from an Employer to an Affiliate, such transfer shall not terminate
the Participant’s participation in the Plan and such Participant shall continue to participate in the Plan until an event occurs that would have terminated his or her participation had the Participant continued in the service of an Employer
until the occurrence of such event; provided, however, that a Participant shall not be entitled (i) to make contributions to the Plan, or (ii) to have contributions made on his or her behalf to the Plan during any period of
employment by any Affiliate that is not an Employer with respect to such Participant. Periods of employment with an Affiliate shall be taken into account only to the extent set forth in Section 10.4 (relating to employment by Affiliates).
Payments received by a Participant from an Affiliate that is not an Employer with respect to such Participant shall not be treated as compensation for any purposes under the Plan. 

ARTICLE 4 
 EMPLOYER
CONTRIBUTIONS 
 Section 4.1. Before-Tax Contributions. 

(a) Initial Election Respecting Regular Payroll Before-Tax Contributions. Subject to the limitations set forth in Sections 4.2
(relating to the 402(g) annual limit on Before-Tax Contributions), 4.4 (relating to limitations on contributions for highly compensated Eligible Employees), 4.5 (relating to the limitation on Employer contributions) and 7.4 (relating to limitations
on allocations imposed by section 415 of the Code), each Employer shall contribute (i) on behalf of each Participant who is an Eligible Employee of such Employer and is a member of a bargaining unit represented by IBEW Local Union 15 an amount
equal to a whole percentage not 

  
 11 

 
less than 1 and not more than 15 percent of such Participant’s Compensation for each payroll period as designated by the Participant in his or her request pursuant to Section 3.2(a),
and (ii) on behalf of any other Participant who is an Eligible Employee of such Employer an amount equal to a whole percentage not less than 1 and not more than 20 percent and, effective as of January 1, 2006, 50 percent, of such
Participant’s Compensation for each payroll period as designated by the Participant on his or her request pursuant to Section 3.2(a). Before-Tax Contributions described in the preceding sentence shall be delivered to the Trustee no less
frequently than bi-weekly. In addition, if back-pay is awarded to a Participant who is an Eligible Employee and any portion of such back-pay constitutes Compensation as defined in subdivision (13) of Article 2 (relating to the definition of
Compensation), the Employer of such Participant shall contribute on behalf of such Participant an amount equal to the Before-Tax Contribution percentage, which was most recently chosen by the Participant in his or her request pursuant to
Section 3.2(a), of such back-pay that constitutes Compensation. A Before-Tax Contribution described in the preceding sentence shall be treated under the Plan in the same manner as all other Before-Tax Contributions and shall be delivered to the
Trustee as soon as practicable after the back-pay is paid to the Participant. 
 If a Participant receives a hardship withdrawal pursuant to
Section 8.1(a), then: (1) all Before-Tax Contributions made on behalf of such Participant pursuant to this Section 4.1 and After-Tax Contributions made by the Participant pursuant to Section 5.1 shall cease beginning with the
first payroll period beginning after the date on which the Participant receives such hardship withdrawal; and (2) such Participant shall not again be eligible to elect such contributions until the first payroll period that coincides with or
follows the date on which contributions ceased by six months. 

  
 12 

 (b) Changes in the Rate or Suspension of Regular Payroll Before-Tax Contributions. A
Participant’s Before-Tax Contributions pursuant to paragraph (a) of this Section 4.1 shall continue in effect at the rate designated by a Participant in his or her request until the Participant changes such designation or suspends
such contributions. A Participant may change such designation at any time by giving direction to the Administrator (or its delegate) in the manner prescribed by the Administrator. Any such direction shall be limited to the contribution rates
described in paragraph (a) of this Section 4.1. 
 A Participant may suspend future Before-Tax Contributions pursuant to paragraph
(a) of this Section 4.1 by giving notice to the Administrator (or its delegate) in the manner prescribed by the Administrator. A Participant who has ceased Before-Tax Contributions pursuant to this subsection may resume Before-Tax
Contributions by so directing the Administrator (or its delegate) in the manner prescribed by the Administrator. All such directions to change the rate of, suspend or resume Before-Tax Contributions shall be effective as of such time after the
Administrator (or its delegate) receives any such direction as shall be established by the Administrator, provided that such direction shall be effective on the first day of a payroll period commencing not more than 30 days after receipt
thereof by the Administrator (or its delegate). 
 (c) Elections Respecting Quarterly Incentive Award Before-Tax Contributions. With
respect to quarterly incentive awards earned prior to January 1, 2002, and subject to the limitations set forth in subdivision (13) of Article 2 (relating to the $170,000 limitation on Compensation) and Sections 4.2 (relating to the 402(g)
limit on Before-Tax Contributions), 4.4 (relating to limitations on contributions for highly compensated Eligible Employees), 4.5 (relating to the limitation on Employer contributions) and 7.4 (relating to limitations on allocations imposed by
section 415 of the Code), each Employer shall contribute on behalf of each Participant who has filed a request in accordance with Section 3.2(b) an amount equal to 100 percent of the amount of any such quarterly incentive awards payable to such
Participant on or after the effective date of such request. A Participant’s Before-Tax Contributions pursuant to this paragraph (c) shall continue in 

  
 13 

 
effect until the Participant suspends such contributions. A Participant may suspend such contributions by giving direction to the Administrator (or its delegate) in the manner prescribed by the
Administrator. Any such direction to suspend Before-Tax Contributions pursuant to this paragraph (c) shall be effective beginning with the quarterly incentive award payable in the calendar quarter immediately following the calendar quarter in
which such direction is received by the Administrator (or its delegate). Before-Tax Contributions pursuant to this paragraph (c) shall be delivered to the Trustee not later than the fifteenth business day of the month following the month in
which the related quarterly incentive award is payable. 
 (d) Catch-Up Contributions. Effective for payroll periods beginning on or
after August 1, 2002, each Participant who pursuant to paragraph (a) of this Section 4.1 is eligible to make Before-Tax Contributions for any Plan Year and who shall attain age 50 before the close of such Plan Year shall be eligible
to have Before-Tax Contributions made in addition to those described in paragraph (a) of this Section 4.1 (“Additional Before-Tax Contributions”) if no other Before-Tax Contributions to be made pursuant to paragraph (a) of
this Section 4.1 may be made to the Plan for such payroll period by reason of the limitations of Section 4.2 (relating to the 402(g) annual limit on Before-Tax Contributions). Notwithstanding the preceding sentence, in no event shall the
amount of Additional Before-Tax Contributions exceed (i) in the case of a Participant who is represented by IBEW Local Union 15 and covered under that certain Collective Bargaining Agreement dated September 15, 2000 between Commonwealth
Edison Company and IBEW Local Union 15, 40 percent of such Participant’s Compensation for any payroll period, and (ii) in the case of any other Participant, 50 percent of such Participant’s Compensation for any payroll period. Such
Additional Before-Tax Contributions shall be elected, made, suspended, resumed and credited in a manner similar to that described in paragraphs (a), (b) and (c) of this Section 4.1 and in accordance with and subject to such additional
rules and limitations of section 414(v) of the 

  
 14 

 
Code and otherwise as the Administrator determines. To the extent such Additional Before-Tax Contributions are not “Catch-Up Contributions” as defined for purposes of section 414(v) of
the Code, they shall be taken into account, and to the extent such Additional Before-Tax Contributions are Catch-Up Contributions they shall not be taken into account, for purposes of Article 4 or 7 or other provisions of the Plan implementing the
required limitations of sections 401(k)(3), 401(k)(11), 401(k)(12), 402(g), 404, 410(b), 415 or 416 of the Code, as applicable. 

Section 4.2. 402(g) Annual Limit on Before-Tax Contributions. 

(a) General Rule. Notwithstanding the provisions of Section 4.1 (relating to Before-Tax Contributions), a Participant’s Before-Tax Contributions for any calendar year, together with amounts contributed under all other plans and arrangements maintained by an Employer or Affiliate and described in sections 401(k), 408(k), 408(p) or
403(b) of the Code, and excluding any Additional Before-Tax Contributions made to the Plan pursuant to paragraph (d) of Section 4.1 which are Catch-Up Contributions described in such paragraph or Default Before-Tax Contributions that are
withdrawn pursuant to paragraph (c)(ii) of Section 3.2, shall not exceed the applicable dollar amount under section 402(g) of the Code (as adjusted for cost-of-living increases in accordance with section 402(g)(5) of the Code) for such calendar
year. 
 (b) Correction of Excess Before-Tax Contributions. If for any calendar year a Participant determines that the aggregate of
the (i) Before-Tax Contributions to this Plan, excluding any Additional Before-Tax Contributions made to the Plan pursuant to paragraph (d) of Section 4.1 which are Catch-Up Contributions described in such paragraph, and
(ii) amounts contributed under other plans or arrangements described in sections 401(k), 408(k) or 403(b) of the Code will exceed the limit imposed by paragraph (a) of this Section 4.2 for the calendar year in which such contributions
were made (“Excess Before-Tax Contributions”), such Participant shall, pursuant to such rules and at such time following such calendar year as determined by the 

  
 15 

 
Administrator, be allowed to submit a written request that the Excess Before-Tax Contributions plus any income and minus any loss allocable thereto be distributed to him or her. The request
described in this subsection shall be made in the manner and form prescribed by the Administrator and shall state the amount of the Participant’s Excess Before-Tax Contributions for the calendar year. The request shall be accompanied by the
Participant’s written statement that if such Excess Before-Tax Contributions are not distributed, such Excess Before-Tax Contributions, when added to amounts deferred under other plans or arrangements described under sections 401(k), 408(k), or
403(b) of the Code, excluding any contributions which are Catch-Up Contributions described in section 414(v) of the Code, will exceed the limit for such Participant under section 402(g) of the Code. A distribution of Excess Before-Tax Contributions
(reduced by any amounts recharacterized or distributed pursuant to paragraph (e)(1) of Section 4.4 (relating to adjustments to comply with section 401(k)(3) of the Code)) shall be made no later than the applicable time period set forth in the
Code and Regulations thereunder following the end of the Plan Year for which such Excess Before-Tax Contributions were made, plus any income and minus any loss allocable thereto through the end of such Plan Year. The amount of any income or loss
allocable to such Excess Before-Tax Contributions shall be determined pursuant to applicable Regulations. If Excess Before-Tax Contributions are distributed pursuant to this Section 4.2, any corresponding Employer Matching Contributions
allocated to the Participant’s Employer Matching Contributions Account, adjusted for income or loss pursuant to Regulations, to which such Participant would be entitled under Section 8.3 (relating to distributions upon termination of
employment) if such Participant had terminated employment on the last day of the calendar year during which contributions were made (or earlier if such Participant actually terminated employment at an earlier date) shall be distributed to such
Participant and any remaining amount of such corresponding Employer Matching Contributions, adjusted for income or loss, shall be forfeited. 

  
 16 

 
Notwithstanding the provisions of this paragraph, any such Excess Before-Tax Contributions shall be treated as “annual additions” for purposes of Section 7.4 (relating to
limitations on allocations imposed by section 415 of the Code) and shall not be disregarded as Before-Tax Contributions for purposes of determining the average deferral percentage described in Section 4.4(d)(1) or, to the extent applicable, the
average contribution percentage described in Section 4.4(d)(2), except that in the case of a non-highly compensated eligible employee, as that term is defined in Section 4.4(d)(4), such Excess Before-Tax Contributions shall be ignored to
the extent that such contributions are prohibited pursuant to section 401(a)(30) of the Code, which requires that Before-Tax Contributions not exceed the limit described in paragraph (a) of Section 4.2 (relating to the annual limit on
Before-Tax Contributions). Any distribution of Excess Before-Tax Contributions to a Participant shall be treated as a distribution of the Untaxed Contributions, up to the extent Untaxed Contributions have been made by such Participant to the Plan
for such Plan Year and, to the extent that distributions of Excess Before-Tax Contributions to such Participant exceed the Participant’s Untaxed Contributions for such Plan Year, the distributions of Excess Before-Tax Contributions shall be
treated as Designated Roth Contributions made by the Participant to the Plan for the Plan Year. 
 (c) Untaxed Contributions and
Designated Roth Contributions. Effective for Before-Tax Contributions made (i) in the case of a Participant who is not a Local 15 Member, for the 2006 Plan Year and thereafter, and (ii) in the case of a Participant who is a Local 15
Member, for the 2009 Plan Year and thereafter, an election made by a Participant to commence, change, suspend or resume Before-Tax Contributions pursuant to this Section 4.2 shall designate the portion of such contributions that are to be
Designated Roth Contributions includible in the Participant’s gross income when made pursuant to section 402A of the Code. Such designation is irrevocable with respect to contributions made or to be made with respect to Compensation

  
 17 

 
currently available. Any such election made by a Participant which does not expressly designate a portion of Before-Tax Contributions as Designated Roth Contributions shall be deemed to designate
no portion of Before-Tax Contributions as Designated Roth Contributions. Any Before-Tax Contributions that are not Designated Roth Contributions are referred to herein as Untaxed Contributions. 

Section 4.3. Employer Matching Contributions. 

(a) Amount of Contributions. Subject to the limitations set forth in Sections 4.4 (relating to limitations on contributions for highly
compensated Eligible Employees), 4.5 (relating to the limitations on Employer contributions) and 7.4 (relating to limitations on allocations imposed by section 415 of the Code), and except as otherwise provided below, each Employer shall contribute
the following for each payroll period on behalf of each Participant who is an Employee of such Employer: 
  

	 	(i)	Effective beginning with the first payroll period in January 1, 2009, for each Participant who is a member of a bargaining unit represented by IBEW Local Union 15, an amount equal to 100 percent of Matched
Contributions, as defined below, but only to the extent that Matched Contributions do not exceed 5 percent of the Participant’s Compensation for the payroll period; 

 

	 	(ii)	For each Participant who is covered under the collective bargaining agreement between Exelon Power Services LLC and Local 369 of the Utility Workers Union of America, AFL-CIO, if such Participant has completed less than
5 months of service with an Employer, no contribution shall be made; if such Participant has completed more than 5 months of service but fewer than 12 months of service with an Employer, an amount equal to 50% of Matched Contributions, as defined
below, but only the extent that Matched Contributions do not exceed 3 percent of the Participant’s Compensation for the payroll period; if such Participant has completed at least 12 months of service with an Employer, an amount equal to 100% of
Matched Contributions, but only to the extent that Matched Contributions do not exceed 3 percent of the Participant’s Compensation for the payroll period. For purposes of this paragraph, a month of service shall mean a consecutive period of
employment during which the Employee is employed by an Employer ending on the monthly anniversary of the Employee’s date of hire. A Participant who is credited with an additional month of service during a pay period and becomes eligible to
receive an increased Employer Matching Contribution, shall not be entitled to receive an increased Employer Matching Contribution until the first full payroll period following the payroll period in which such Participant is credited with such
additional month of service; 

  
 18 

	 	(iii)	For each Participant who is classified as a non-exempt craft employee or clerical employee assigned to the Peachbottom, Limerick, Outage Services East or Texas generating plant, an amount equal to 100 percent of Matched
Contributions, as defined below, but only to the extent that Matched Contributions do not exceed 5 percent of the Participant’s Compensation for the payroll period; and 

 

	 	(iv)	For each other Participant, an amount equal to 60 percent of Matched Contributions, as defined below, but only to the extent that Matched Contributions do not exceed 5 percent of the Participant’s Compensation for
the payroll period. 

 In addition, each Participant described in clause (iv) of the preceding paragraph shall be
eligible to receive a “Profit Sharing Matching Contribution,” provided that such Participant either (i) is an Employee of such Employer on the last day of such Plan Year, (ii) is not employed on such day as a result of an
approved unpaid leave of absence during such Plan Year, (iii) terminates employment during such Plan Year (1) after attaining age 50 and completing at least 10 years of service, as determined by the Administrator, (2) as a result of
circumstances entitling the Participant to separation benefits under an Employer’s severance benefit plan, (3) as a result of a disability that entitles the Participant to benefits under an Employer’s long-term disability plan, or
(4) on account of the Participant’s death. The “Profit Sharing Matching Contribution” shall be an amount (if any) determined by the Board of Directors of the Company (or the Compensation Committee thereof) in its sole discretion
based on attainment of specified performance goals, and not exceeding 60% of a Participant’s Matched Contributions, as defined below, for each payroll period, but only to the extent that such Matched Contributions do not exceed 5 percent of the
Participant’s Compensation for the payroll period. 

  
 19 

 For purposes of this Section 4.3, “Matched Contributions” means the sum of
(i) the Before-Tax Contributions made on behalf of the Participant for a payroll period, excluding Before-Tax Contributions made with respect to any quarterly incentive awards pursuant to paragraph (b) of Section 3.2, excluding
Additional Before-Tax Contributions which are Catch-Up Contributions described in section 414(v) of the Code and excluding Default Before-Tax Contributions distributed pursuant to paragraph (c)(ii) of Section 3.2 (relating to withdrawal of
Default Before-Tax Contributions), and (ii) the After-Tax Contributions made by the Participant for such payroll period. Any Employer Matching Contributions made by an Employer with respect to Default Before-Tax Contributions that are withdrawn
pursuant to paragraph (c)(ii) of Section 3.2, plus any earnings, shall be forfeited and used to reduce future Employer Matching Contributions made by an Employer pursuant to this Section. 

In addition to the Employer Matching Contributions described above, in the case of a New England Plan Participant, as defined in Supplement IV
attached hereto, whose Before-Tax Contributions exceed the limit described in Section 4.2 (relating to the 402(g) annual limit on Before-Tax Contributions), an additional Employer Matching Contribution shall be made on behalf of such
Participant in an amount equal to the amount described in clause (iii) above assuming that such Participant had continued making the same rate of Before-Tax Contributions that were in effect with respect to such Participant at the time such
Before-Tax Contributions exceeded the limit described in Section 4.2. 
 (b) Special Part-Time Employees. Notwithstanding
paragraph (a) hereof, no Employer shall make a contribution pursuant to this Section 4.3 on behalf of any Participant who is a “part-time regular employee” as defined in an Agreement dated July 23, 1993 between the Company
and the System Council U-25, I.B.E.W. (the “July 23, 1993 Agreement”), unless one of the following applies: 
  

	 	(1)	the Participant had in effect on July 23, 1993 an authorization to make contributions under the Plan as then in effect and elected pursuant to the July 23, 1993 Agreement and request by the Company to become a
part-time regular employee during the initial staffing period that began July 23, 1993 and ended December 31, 1993 (the “Initial Staffing Period”); 

  
 20 

	 	(2)	the Participant had in effect on the date the Participant became a part-time regular employee an authorization to make contributions under the Plan as then in effect and chose the Option II Benefits Package as described
in the July 23, 1993 Agreement, as amended; 

  

	 	(3)	the Participant did not have in effect on the date the Participant became a part-time regular employee an authorization to make contributions under the Plan as then in effect and elected pursuant to the July 23,
1993 Agreement and request by the Company to become a part-time regular employee during the Initial Staffing Period; provided such Participant had in effect on any date after December 24, 1995 and before February 20, 1996 an authorization
to make contributions under the Plan; or 

  

	 	(4)	the Participant elected other than pursuant to the July 23, 1993 Agreement to become a part-time regular employee during the Initial Staffing Period; provided that such Participant had in effect on any date after
December 24, 1995 and before February 20, 1996 and authorization to make contributions under the Plan. 

 (c)
Time of Delivery of Contributions. Employer Matching Contributions for any Plan Year shall be delivered to the Trustee at the same time the Before-Tax contributions or After-Tax Contributions to which such Employer Matching Contributions
relate are delivered to the Trustee. 
 Section 4.4. Limitations on Contributions for
Highly-Compensated Eligible Employees. 
 (a) Limits Imposed by Section 401(k)(3) of the
Code. Notwithstanding the provisions of Section 4.1 (relating to Before-Tax Contributions), if the Before-Tax Contributions for a Plan Year fail, or in the judgment of the Administrator are likely to fail, to satisfy both of the tests set
forth in paragraphs (1) and (2) of this subsection, the adjustments prescribed in paragraph (e)(1) of this Section 4.4 shall be made. 
  

	 	(1)	The average deferral percentage for the group consisting of highly compensated eligible employees of all Employers does not exceed the product of the average deferral percentage for the group consisting of non-highly
compensated eligible employees multiplied by 1.25. 

  
 21 

	 	(2)	The average deferral percentage for the group consisting of highly compensated eligible employees of all Employers (i) does not exceed the average deferral percentage for the group consisting of non-highly
compensated eligible employees by more than two percentage points, and (ii) does not exceed two times the average deferral percentage for such group. 

Effective for payroll periods beginning on or after August 1, 2002, any Additional Before-Tax Contributions which are “Catch-Up Contributions”
described in paragraph (d) of Section 4.1 shall not be considered as Before-Tax Contributions for purposes of determining whether the tests set forth in paragraphs (1) and (2) of this subsection are satisfied or for purposes of
making any adjustments prescribed in paragraph (e) of this Section 4.4. 
 (b) Limits Imposed by Section 401(m) of the
Code. Notwithstanding the provisions of Section 4.3 (relating to Employer Matching Contributions) and Section 5.1 (relating to After-Tax Contributions), if the Employer Matching Contributions and After-Tax Contributions for a Plan Year
fail, or in the judgment of the Administrator are likely to fail, to satisfy both of the tests set forth in paragraphs (1) and (2) of this subsection, the adjustments prescribed in paragraph (e)(2) of this Section 4.4 shall be made.

  

	 	(1)	The average contribution percentage for the group consisting of highly compensated eligible employees of all Employers does not exceed the product of the average contribution percentage for the group consisting of
non-highly compensated eligible employees multiplied by 1.25. 

  

	 	(2)	The average contribution percentage for the group consisting of highly compensated eligible employees of all Employers (i) does not exceed the average contribution percentage for the group consisting of non-highly
compensated eligible employees by more than two percentage points, and (ii) does not exceed two times the average contribution percentage for such group. 

(c) Aggregate Limit on Contributions. Deleted in its entirety. 

  
 22 

 (d) Definitions. For purposes of this Section 4.4: 

 

	 	(1)	the “average deferral percentage” for a group of Eligible Employees with respect to a Plan Year shall be the average of the ratios, calculated separately for each Eligible Employee in such group to the nearest
one-hundredth of one percent, of the Before-Tax Contributions made for the benefit of such Eligible Employee to the total compensation paid to such Eligible Employee for the portion of such Plan Year during
which such Eligible Employee was a Participant, except that no Additional Before-Tax Contributions which are “Catch-Up Contributions” described in paragraph (d) of Section 4.1 or Default Before-Tax Contributions that are
withdrawn pursuant to paragraph (c)(ii) of Section 3.2 shall be considered as Before-Tax Contributions for purposes of determining a Participant’s average deferral percentage; 

 

	 	(2)	the “average contribution percentage” for a group of Eligible Employees with respect to a Plan Year shall be the average of the ratios, calculated separately for each Eligible Employee in such group to the
nearest one-hundredth of one percent, of the Employer Matching Contributions made, After-Tax Contributions made and, in the Administrator’s sole discretion, to the extent permitted under Regulations or
otherwise under the Code, the Before-Tax Contributions made during such year for the benefit of such Eligible Employee, except that no Additional Before-Tax Contributions which are “Catch-Up Contributions” described in paragraph
(d) of Section 4.1, shall be considered as Before-Tax Contributions for purposes of determining a Participant’s average contribution percentage, to such Eligible Employee’s compensation for the portion of such Plan Year during
which such Eligible Employee was a Participant; 

  

	 	(3)	the term “highly compensated eligible employee” shall mean any Eligible Employee who is a Participant, who performs service in the determination year and who (a) is a 5%-owner (as determined under section
416(i)(1)(A)(iii) of the Code) at any time during the Plan Year or the preceding Plan Year or (b) both (1) is paid compensation in excess of $80,000 (as adjusted for increases in the cost of living in accordance with section 414(q) of the
Code) from an Employer for the preceding Plan Year, and (2) is in the group of employees consisting of the top 20% of the employees of the Employer and its Affiliates when ranked on the basis of compensation paid during such preceding Plan
Year; 

  

	 	(4)	the term “non-highly compensated eligible employee” shall mean any Eligible Employee who is a Participant, who performs services in the determination year and is not a highly compensated eligible employee;

  

	 	(5)	the term “compensation” shall have the meaning set forth in section 414(s) of the Code or, in the discretion of the Administrator, any other meaning in accordance with the Code for these purposes, except that
for purposes of determining whether an Eligible Employee is a “highly compensated eligible employee”, as described in paragraph (d)(3) of this Section 4.4, “compensation” shall have the meaning set forth in section 415(c)(3)
of the Code; 

  
 23 

	 	(6)	if this Plan and one or more other plans of the Employer to which Before-Tax Contributions, After-Tax Contributions, or qualified nonelective contributions (as such term is defined in section 401(m)(4)(C) of the Code)
are made are treated as one plan for purposes of section 410(b) of the Code, such plans shall be treated as one plan for purposes of this Section. If a highly compensated eligible employee participates in this Plan and one or more other plans of the
Employer to which any such contributions are made, all such contributions shall be aggregated for purposes of this Section 4.4; and 

  

	 	(7)	if this Plan benefits Employees who are included in a unit of employees covered by a collective bargaining agreement and employees who are not included in such collective bargaining unit, this Plan shall be treated as
comprising two or more separate plans, as determined by the Administrator in accordance with applicable Regulations, for purposes of this Section 4.4. If such other plan has a plan year that is different from the Plan Year of this Plan, then
the highly compensated eligible employee’s contributions made to such other plan during the Plan Year of this Plan shall be aggregated with contributions of the same type made to this Plan for such Plan Year for purposes of determining the
average deferral percentage and average contribution percentage for this Plan for such Plan Year for the group of highly compensated eligible employees. 

This paragraph is inserted at the request of the Internal Revenue Service in order to obtain a favorable determination letter. In computing
the “average deferral percentage” for a group of Eligible Employees with respect to a Plan Year, the Before-Tax Contributions that will be taken into account for such Plan Year will be only those that relate to compensation that would have
been received by the Eligible Employee in the Plan Year or is attributable to services performed by the Eligible Employee in the Plan Year and would have been received by the Eligible Employee within 2-1/2 months after the close of the Plan Year. In
computing the “average contribution percentage” for a group of Eligible Employees with respect to a Plan Year, (i) an After-Tax Contribution will be taken into account only if it is paid to the Trust during such Plan Year or paid to
an agent of the Plan and transmitted to the Trust within a reasonable time after the end of the Plan Year; (ii) an excess contribution that is recharacterized will be taken into account during the Plan Year in which the contribution would have
been received in cash by the Eligible Employee had 

  
 24 

 
the Eligible Employee not elected to defer the contribution; (iii) an Employer Matching Contribution will be taken into account only if it is made on account of the Eligible Employee’s
Before-Tax Contributions or After-Tax Contributions, allocated to the Eligible Employee’s Account as of a date within that Plan Year and paid to the Trust by the end of the twelfth month following the close of such Plan Year; and
(iv) qualified matching contributions which are used to meet the requirements of section 401(k)(3)(A) of the Code are not to be taken into account for purposes of the actual deferral percentage test of section 401(m) of the Code. To the extent
required by law, the following will be treated as separate plans for purposes of sections 401(a)(4) and 410(b) of the Code: (i) the portion of the Plan that is a 401(k) plan, (ii) the portion of the Plan that is a section 401(m) plan;
(iii) the portion of the plan that provides for contributions other than elective, employee or matching; (iv) the portion of the Plan that is an ESOP; and (v) the portion of the plan that is not an ESOP. 

(e) Adjustments to Comply with Limits. 

(1) Adjustments to Comply with Section 401(k)(3) of the Code. The Administrator shall cause to be made such periodic computations
as it shall deem necessary or appropriate to determine whether either of the tests set forth in paragraph (a)(1) or (a)(2) of this Section 4.4 shall be satisfied during a Plan Year, and, if it appears to the Administrator that neither of such
tests will be satisfied, the Administrator shall take such steps as it deems necessary or appropriate to reduce or otherwise adjust the Before-Tax Contributions contributed or to be contributed for all or a portion of such Plan Year on behalf of
Participants who are highly compensated eligible employees to the extent necessary in order for one of such tests to be satisfied. If, as of the end of the Plan Year, the Administrator determines that, notwithstanding any adjustments made pursuant
to the 

  
 25 

 
preceding sentence, neither of the tests set forth in paragraph (a)(1) and (a)(2) of this Section 4.4 shall be satisfied with respect to such Plan Year, the total amount by which Before-Tax
Contributions must be reduced in order to satisfy either such test shall be calculated in the manner prescribed by section 401(k)(8)(B) of the Code (the “excess contributions amount”). The Before-Tax Contributions made on behalf of the
Participant who is a highly compensated eligible employee and whose actual dollar amount of Before-Tax Contributions is the highest shall be reduced until such dollar amount equals the next highest actual dollar amount of Before-Tax Contributions
made for such Plan Year on behalf of any highly compensated employee, or until the total reduction equals the excess contributions amount. If further reductions are necessary, then the Before-Tax Contributions on behalf of each Participant who is a
highly compensated eligible employee and whose actual dollar amount of Before-Tax Contributions is the highest (after the reduction described in the preceding sentence) shall be reduced in accordance with the previous sentence. Such reductions shall
continue to be made to the extent necessary so that the total reduction equals the excess contributions amount. 
 To the extent that the
sum of such reductions with respect to a Participant and the amount of other After-Tax Contributions allocated to such Participant’s After-Tax Contributions Account does not exceed 20 percent (10 percent in the case of a Participant who is a
member of a bargaining unit represented by IBEW Local Union 15) of the Participant’s Compensation, the amount of such reductions shall be treated as an After-Tax Contribution. To the extent such amount cannot be treated as an After-Tax
Contribution because of the limitation described in the preceding sentence, such amount, plus any income and minus any loss allocable thereto through the end of the Plan Year for which the After-Tax Contribution was made, shall be distributed to
such Participant no later than 

  
 26 

 
the last day of the subsequent Plan Year and the Participant shall forfeit any corresponding Employer Matching Contributions related thereto plus any income and minus any loss allocable thereto
through the end of the Plan Year for which the Employer Matching Contribution was made. The Participant shall designate the extent to which such distributed excess contributions are treated as Untaxed Contributions or Designated Roth Contributions
(but only up to the extent that such types of contributions were made by the Participant to the Plan for the Plan Year) and, in the event that any such designation is not made or is incomplete, such distributed excess contributions shall be treated
as Untaxed Contributions up to the extent Untaxed Contributions were made to the Plan for the Plan Year and, to the extent that such distributed excess contributions exceed such Untaxed Contributions, such excess contributions shall be treated as
distributions of Designated Roth Contributions made to the Plan for the Plan Year. 
 The amount of Before-Tax Contributions to be
distributed to a Participant pursuant to this Section shall be reduced by any Before-Tax Contributions previously distributed to such Participant pursuant to Section 4.2(b) (relating to correction of Excess Before-Tax Contributions) for such
Plan Year. The amount of any income or loss allocable to any such reductions to be so distributed shall be determined pursuant to Regulations. The unadjusted amount of any such reductions so distributed shall be treated as “annual
additions” for purposes of Section 7.4 (relating to limitations on allocations imposed by section 415 of the Code). 

  
 27 

 (2) Adjustments to Comply with Section 401(m) of the Code. The Administrator shall
cause to be made such periodic computations as it shall deem necessary or appropriate to determine whether either of the tests set forth in paragraph (b)(1) or (b)(2) of this Section 4.4 shall be satisfied during a Plan Year, and, if it appears
to the Administrator that neither of such tests will be satisfied, the Administrator shall take such steps as it deems necessary or appropriate to adjust the Employer Matching Contributions made, After-Tax Contributions made, and any Before-Tax
Contributions treated as Employer Matching Contributions pursuant to paragraph (d)(2) of this Section 4.4 for all or a portion of such Plan Year on behalf of Participants who are highly compensated eligible employees to the extent necessary in
order for one of such tests to be satisfied. If after the end of a Plan Year it is determined that regardless of any steps taken neither of the tests set forth in paragraph (b)(1) or (b)(2) of this Section 4.4 shall be satisfied with respect to
such Plan Year, the Administrator shall calculate the total amount by which any such contributions on behalf of Participants who are highly compensated eligible employees must be reduced in order to satisfy either such test, in the manner prescribed
by section 401(m)(6) of the Code (the “excess aggregate contributions amount”). The amount to be reduced with respect to Participants who are highly compensated eligible employees shall be determined by first reducing the After-Tax
Contributions (including Before-Tax Contributions recharacterized as After-Tax Contributions pursuant to paragraph (e)(1) of this Section 4.4) and then by reducing the Employer Matching Contributions for each Participant whose actual dollar
amount of such aggregate contributions for such Plan Year is highest until such reduced dollar amount equals the next highest dollar amount of such contributions for such Plan Year on behalf of any other highly compensated eligible employee, or
until the total reduction equals the excess aggregate contributions amount. If further reductions are necessary, such contributions on behalf of each Participant who is a highly compensated eligible employee and whose actual dollar amount of such
contributions is the highest (after the reduction described in the preceding sentence) shall be reduced in accordance with the preceding 

  
 28 

 
sentence. Such reductions shall continue to be made to the extent necessary until the total reduction equals the excess aggregate contributions amount. If After-Tax Contributions are distributed
pursuant to this paragraph (e)(2), any corresponding Employer Matching Contributions related thereto plus any income and minus any loss allocable through the end of the Plan Year for which the Employer Matching Contributions were made to which such
Participant would be entitled under Section 8.3 (relating to distributions upon termination of employment) if such Participant had terminated employment on the last day of the Plan Year for which contributions were made (or earlier if any such
Participant actually terminated employment at any earlier date) shall also be distributed with such After-Tax Contributions (and taken into account to determine whether further reductions are necessary), and any remaining amount of such
corresponding Employer Matching Contributions plus any income and minus any loss allocable through the end of the Plan Year for which the Employer Matching Contributions were made shall be forfeited. If the reductions required by this subparagraph
exceed the amount of After-Tax Contributions made or to be made by any Participant for such Plan Year and the amount of Employer Matching Contributions made or to be made on behalf of such Participant for such Plan Year, any Before-Tax Contributions
made on behalf of such Participant that the Administrator has elected to treat as Employer Matching Contributions pursuant to paragraph (d)(2) of this Section 4.4 shall also be adjusted and taken into account in accordance with this
subparagraph, except that such Before-Tax Contributions may not be recharacterized as After-Tax Contributions. 

  
 29 

 Section 4.5. Limitation on Employer Contributions. 

The contributions of an Employer for any Plan Year shall not exceed the maximum amount for which a deduction is allowable to such Employer for
federal income tax purposes for the fiscal year of such Employer that coincides with such Plan Year. 
 Any contribution made by an Employer
by reason of a good faith mistake of fact, or the portion of any contribution made by an Employer that exceeds the maximum amount for which a deduction is allowable to such Employer for federal income tax purposes by reason of a good faith mistake
in determining the maximum allowable deduction, shall upon the request of such Employer be returned by the Trustee to the Employer. An Employer’s request and the return of any such contribution must be made within one year after such
contribution was mistakenly made or after the deduction of such excess portion of such contribution was disallowed, as the case may be. The amount to be returned to an Employer pursuant to this paragraph shall be the excess of (i) the amount
contributed over (ii) the amount that would have been contributed had there not been a mistake of fact or a mistake in determining the maximum allowable deduction. Earnings attributable to the mistaken contribution shall not be returned to the
Employer, but losses attributable thereto shall reduce the amount to be so returned. If the return to the Employer of the amount attributable to the mistaken contribution would cause the balance of any Participant’s account as of the date such
amount is to be returned (determined as if such date coincided with the close of a Plan Year) to be reduced to less than what would have been the balance of such account as of such date had the mistaken amount not been contributed, the amount to be
returned to the Employer shall be limited so as to avoid such reduction. 
 Any Before-Tax Contributions returned to an Employer pursuant to
this Section 4.5 shall be treated as the return of Untaxed Contributions, up to the extent Untaxed Contributions were made by such Participant to the Plan for such Plan Year and, to the extent that the returned contributions exceed such Untaxed
Contributions, such returned contributions shall be treated as Designated Roth Contributions made by the Participant to the Plan for the Plan Year. 

  
 30 

 ARTICLE 5 

EMPLOYEE CONTRIBUTIONS 

Section 5.1. After-Tax Contributions. 

Subject to the limitations set forth in Section 4.4 (relating to limitations on contributions for highly-compensated Eligible Employees)
and Section 7.4 (relating to limitations on allocations imposed by section 415 of the Code), each Participant who is an Eligible Employee may elect in accordance with Section 3.2(a) to make After-Tax Contributions under the Plan by payroll
deduction. After-Tax Contributions made by a Participant who is a member of a bargaining unit represented by IBEW Local Union 15 for any payroll period shall equal a whole percentage not less than 1 nor more than 10 percent of the Participant’s
Compensation for such payroll period, as designated by the Participant in his or her request pursuant to Section 3.2(a). After-Tax Contributions made by any other Participant for any payroll period shall equal a whole percentage not less than 1
nor more than 20 percent and, effective as of January 1, 2006, 50 percent, of the Participant’s Compensation for such payroll period, as designated by the Participant in his or her request pursuant to Section 3.2(a). Except as set
forth below, After-Tax Contributions shall be delivered to the Trustee no less frequently than bi-weekly. In addition, if back-pay is awarded to a Participant who is an Eligible Employee and any portion of such back-pay constitutes Compensation as
defined in subsection (13) of Article 2 (relating to the definition of compensation), After-Tax Contributions shall be made for such Participant in an amount equal to the After-Tax Contribution percentage, which was most recently chosen by the
Participant in his or her request pursuant to Section 3.2(a), of such back-pay that constitutes Compensation. An 

  
 31 

 
After-Tax Contribution described in the preceding sentence shall be treated under the Plan in the same manner as all other After-Tax Contributions and shall be delivered to the Trustee as soon as
practicable after the back-pay is paid to the Participant. Except as provided in the following sentence and in Section 4.1, After-Tax Contributions shall be subject to the same provisions regarding commencement, change and suspension applicable
to Before-Tax Contributions as set forth in Section 4.1. If a Participant who has not attained age 59 1⁄2 makes a withdrawal of After-Tax Contributions
pursuant to Section 8.1(c), then: (a) After-Tax Contributions made by such Participant pursuant to this Section 5.1 shall cease beginning with the first payroll period beginning after the date on which the Participant receives such
withdrawal and (b) such Participant shall not again be eligible to elect such contributions until the first payroll period that coincides with or follows the date on which contributions ceased by 6 months. 

Section 5.2. Rollover Contributions. 

(a) The Trustee shall be authorized to receive, hold and distribute in accordance with the Plan, a direct rollover contribution consisting of
cash, transferred to the Plan by (i) a qualified plan described in section 401(a) or 403(a) of the Code, including after-tax employee contributions to such plan, (ii) an annuity contract described in section 403(b) of the Code, excluding
after-tax employee contributions or (iii) an eligible plan under section 457(b) of the Code which is maintained by a state, political subdivision of a state, or any agency or instrumentality of a state or political subdivision of a state. The
Trustee shall also be authorized to receive, hold and distribute in accordance with the Plan, a Participant contribution of an eligible rollover distribution from (A) a qualified plan described in section 401(a) or 403(a) of the Code,
(B) an annuity contract described in section 403(b) of the Code, (C) an eligible plan under section 457(b) of the Code which is maintained by a state, political subdivision of a state, or any agency or instrumentality of a state or
political subdivision of a state or (D) an individual retirement account or annuity 

  
 32 

 
described in section 408(a) or 408(b) of the Code that is eligible to be rolled over and would otherwise be includible in gross income. The amounts transferred must be eligible rollover
distributions, as defined in section 402(c) of the Code. Effective December 1, 2012, an eligible rollover distribution of a lump sum amount from a qualified defined benefit plan sponsored by the Company also may be contributed to this Plan in
accordance with administrative rules established by the Administrator. Notwithstanding any provision of the Plan to the contrary, a rollover contribution shall not include “designated Roth contributions” described in section 402A of the
Code or any related earnings with respect to such contributions. 
 (b) Delivery of Rollover Contributions to Administrator. Except
as otherwise provided in paragraph (a) of this Section 5.2, if an individual desires to make a rollover contribution pursuant to such paragraph (a), such contribution either (i) shall be delivered by the individual to the
Administrator and by the Administrator to the Trustee on or before the 60th day after the day on which the Employee receives the distribution or on or before such later date as may be prescribed by law, or (ii) shall be transferred on behalf of
the individual directly from the trust from which the eligible rollover distribution is made. Any contribution that is delivered by the Eligible Employee must be accompanied by (i) a statement of the Employee that to the best of his or her
knowledge the amount so transferred meets the conditions specified in paragraph (a) of this Section 5.2, (ii) a copy of such documents as may have been received by the Employee advising him or her of the amount of and the character of
such distribution and (iii) any investment election with respect to such contribution in such form and manner as may be required by the Administrator. Notwithstanding the foregoing, the Administrator shall not accept a rollover contribution if
in its judgment accepting such contribution would cause the Plan to violate any provision of the Code or Regulations, and the Administrator shall not be required to accept such a contribution to the extent it consists of property other than cash.

  
 33 

 Section 5.3. Special Accounting Rules for Rollover Contributions. 

If a rollover contribution is made by or on behalf of an Employee, the Administrator shall cause a Rollover Account to be established and
maintained for such Employee to which shall be credited all rollover contributions made pursuant to Section 5.2. A rollover contribution shall be credited to such Rollover Account as of the Valuation Date coinciding with or next following the
date on which such contribution is delivered to the Trustee. 
 If a rollover contribution is made by, or a direct transfer is made on
behalf of, an Eligible Employee prior to becoming a Participant, such Eligible Employee shall until such time as he or she becomes a Participant be deemed to be a Participant, and his or her Rollover Account and After-Tax Contributions Account, if
any, shall be deemed to be an account of a Participant, for all purposes of the Plan except for the purposes of the allocation of contributions provided for in paragraphs (a), (b), (c), (d) and (e) of Section 7.3 and any determination
of when he or she becomes a Participant pursuant to Article 3. 
 ARTICLE 6 

TRUST AND INVESTMENT FUNDS 

Section 6.1. Trust. 

A Trust shall be created by the execution of a trust agreement between the Company and the Trustee. All contributions under the Plan shall be
paid to the Trustee. The Trustee shall hold all monies and other property received by it and invest and reinvest the same, together with the income therefrom, on behalf of the Participants collectively in accordance with the provisions of the trust
agreement. The Trustee shall make distributions from the Trust Fund at such time or times to such person or persons and in such amounts as the Administrator directs in accordance with the Plan. 

  
 34 

 Section 6.2. Investment Funds. 

The Trustee shall establish and maintain, or shall cause to be established and maintained, an investment fund herein called the “Employer
Stock Fund” which shall be invested in Common Stock, and shall also include such short-term obligations and short-term liquid investments purchased by the Trustee, in accordance with the Trust Agreement,
pending the selection and purchase of the Common Stock or as otherwise determined by the Trustee to be necessary to satisfy such fund’s cash needs. In addition, as directed by the Investment Office, one or more additional separate investment
funds shall be established and maintained and shall be invested as directed by the Investment Office. The Investment Office also may, from time to time, and in its sole discretion, segregate any of the assets held under any investment fund
established pursuant to this Section 6.2 and allocate the investment results from such segregated assets among all or a portion of the accounts of Participants in such manner as it shall determine to be appropriate. All charges and expenses
incurred in connection with the purchase and sale of investments for a fund shall be charged to such fund except to the extent such charges and expenses are paid by the Employers or from other revenue available to the Plan. 

ARTICLE 7 

PARTICIPANT ACCOUNTS AND INVESTMENT ELECTIONS 

Section 7.1. Participant Accounts and Investment Elections. 

(a) Participant Accounts. For each Participant the Administrator shall establish and maintain, or shall cause to be established and
maintained, investment accounts to which amounts contributed under the Plan shall be credited according to each Participant’s investment elections pursuant to paragraph (b) of this Section 7.1, subject to the penultimate sentence of
the first paragraph of Section 6.2 (relating to the Investment Office’s authority to segregate any of the assets held under any investment fund). 

  
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 Each such investment account shall, to the extent appropriate, be composed of the following
accounts: (A) a Before-Tax Contributions Account, which shall be divided into an Untaxed Contribution Account and a Designated Roth Contributions Account, (B) a Catch-Up Contributions Account, (C) an Employer Matching Contributions
Account, (D) an After-Tax Contributions Account, and (E) a Rollover Account. Earnings and losses on investment of funds in each account shall be credited or debited to that account. 

All such accounts and subaccounts shall be for accounting purposes only, and there shall be no segregation of assets within the investment
funds among the separate Participants’ accounts. 
 (b) Investment Election. Each Participant, as part of his or her request for
participation described in Section 3.2 (or in connection with the delivery of a rollover contribution pursuant to Section 5.2), shall make an investment election that shall apply to the investment of contributions to be made on his or her
behalf or by him or her pursuant to Article 4 (relating to Employer contributions) or Article 5 (relating to Employee contributions) and any earnings on such contributions. Such election shall specify that such contributions be invested
either (i) wholly in one of the funds maintained or employed by the Trustee pursuant to paragraph (a) of this Section 7.1 or (ii) divided among such funds in 1 percent increments or in such other increments established by the
Administrator or the Investment Office from time to time. Each Eligible Employee for whom a Rollover Account is established before such Eligible Employee has become a Participant shall, in the manner prescribed by the Administrator, make such
investment election as of the Valuation Date on which such account is established. During any period in which no direction as to the investment of an Employee’s account is on file with the Administrator, contributions or direct transfers made
by him or her, or on his or her behalf, to the Plan will be invested in such manner as the Investment Office shall determine. 

  
 36 

 (c) Change of Investment Election. Subject to such restrictions as may be
imposed by the Administrator or the Investment Office (including, without limitation, any restrictions imposed with respect to transfers of funds to or from the Employer Stock Fund described in Section 6.2 by individuals who are subject to
Rule16b-3 under section 16 of the Securities Exchange Act of 1934), a Participant may elect to change as of any Valuation Date his or her investment election applicable to all or any portion of his or her current account balance. In addition, a
Participant may elect to change as of the first day of any payroll period his or her investment election applicable to future contributions made pursuant to Articles 4 (relating to Employer contributions) or 5 (relating to Employee contributions),
or both, as specified by the Participant. Such changes shall be limited to the investment funds then maintained or employed by the Trustee pursuant to paragraph (a) of this Section 7.1. A Participant’s change of investment election
must be made in the manner and at the time prescribed by the Administrator (or its delegate). Any such change shall specify that such contributions be invested either (i) wholly in one of the funds maintained or employed by the Trustee pursuant
to paragraph (a) of this Section 7.1, or (ii) divided among such funds in 1 percent increments or such other increments established by the Administrator or the Investment Office from time to time. 

Section 7.2. Allocation of Net Income of Trust Fund and Fluctuation in Value of Trust Fund Assets. 

In the event that contributions, income and losses are not otherwise specifically allocated to Participant accounts by the Trustee, as soon as
practical after each Valuation Date, the net worth of each investment fund (as defined in Section 6.2) as of such Valuation Date shall be determined. If the net worth of such investment fund as so determined is more or less than the total of
all 

  
 37 

 
balances credited as of such Valuation Date to the subaccounts of Participants invested in the investment fund as of such Valuation Date who are Participants as of such Valuation Date, the amount
of any excess or deficiency shall be prorated and credited or charged to such subaccounts proportionally to the balances of such subaccounts as of the preceding Valuation Date after making all allocations for such preceding Valuation Date prescribed
by this Article and after decreasing each such subaccount by any loans, withdrawals or distributions from such subaccount during such period (but not less than zero), with all of such decreases to be made in such manner as the Administrator
determines in its discretion to be necessary. 
 Notwithstanding any provision of this Article 7, any Designated Roth Contributions Account
shall be maintained in a manner that satisfies the separate accounting requirement, and any Regulations or other requirements promulgated, under section 402A of the Code. Accordingly, gains, losses and other credits and charges shall be separately
allocated on a reasonable basis to each such account and other accounts under the Plan, the Plan shall keep a record of each Participant’s Designated Roth Contributions that have not been withdrawn, and contributions and withdrawals of
Designated Roth Contributions, and related earnings, shall be accounted for with respect to Designated Roth Contributions Accounts. However, forfeitures shall not be allocated to any Designated Roth Contributions Account. These separate accounting
requirements apply with respect to a Participant from the time the Participant makes his or her first Designated Roth Contribution until the time the Participant’s Designated Roth Contributions Account is distributed. 

  
 38 

 Section 7.3. Allocations of Contributions Among Participants’ Accounts.

 (a) Allocation of Before-Tax Contributions. Before-Tax Contributions shall be allocated to the Before-Tax Contributions Account of
each Participant for whom such contributions are made as soon as practical after such contributions are delivered to the Trustee or insurer maintaining a group annuity contract. The Before-Tax Contributions that consist of (i) Before-Tax
Contributions made on behalf of the Participant pursuant to Section 4.1 for Plan Years beginning prior to (A) in the case of a Participant who is not a Local 15 Member, January 1, 2006, and (B) in the case of a Participant who is
a Local 15 Member, January 1, 2009, (ii) any Before-Tax Contributions transferred to the Plan from the PECO Energy Company Employee Savings Plan on behalf of such Participant, and (iii) any Before-Tax Contributions that are Untaxed
Contributions made pursuant to Section 4.2 for Plan Years beginning on or after (A) in the case of a Participant who is not a Local 15 Member, January 1, 2006, and (B) in the case of a Participant who is a Local 15 Member,
January 1, 2009, shall be allocated to the Untaxed Contributions Account of such Participant. The Before-Tax Contributions that consist of Designated Roth Contributions made on behalf of the Participant pursuant to paragraph
(c) Section 4.2 (relating to Untaxed Contributions and Designated Roth Contributions) for Plan Years beginning on or after (A) in the case of a Participant who is not a Local 15 Member, January 1, 2006, and (B) in the case
of a Participant who is a Local 15 Member, January 1, 2009, January 1, 2006 shall be allocated to the Designated Roth Contributions Account of such Participant. 

(b) Allocation of Catch-Up Contributions. Catch-Up Contributions shall be allocated to the Catch-Up Contributions Account of each
Participant for whom such contributions are made as soon as practical after such contributions are delivered to the Trustee or insurer maintaining a group annuity contract. 

(c) Allocation of Employer Matching Contributions. Employer Matching Contributions shall be allocated to the Employer Matching
Contributions Account of each Participant for whom such contributions are made as soon as practical after such contributions are delivered to the Trustee or insurer maintaining a group annuity contract. 

  
 39 

 (d) Allocation of After-Tax Contributions. After-Tax Contributions shall be allocated to
the After-Tax Contributions Account of the Participant who makes such contributions as soon as practical after such contributions are delivered to the Trustee or insurer maintaining a group annuity contract. 

(e) Allocation of Rollover Contributions and Direct Transfers. Rollover contributions made pursuant to Article 5 (relating to Employee
contributions) shall be credited to the Rollover Account of the Participant on whose behalf such contribution is made as of the Valuation Date coinciding with or next following the date on which the contribution is delivered to the Trustee. 

(f) Allocation of Forfeitures. The total amount forfeited during any Plan Year shall be used to (i) pay the expenses incurred by
the Trustee for the administration of the Trust Fund not paid by the Company, (ii) held to pay the expenses reasonably estimated by the Trustee for the administration of the Trust Fund during the next following Plan Year but not expected to be
paid by the Company, or (iii) used to reduce Employer Matching Contributions as determined by the Administrator. 

Section 7.4. Limitations on Allocations Imposed by Section 415 of the Code. 

Notwithstanding any other provision of the Plan, the amount allocated to a Participant’s accounts under the Plan for each Plan Year shall
be limited so that the aggregate annual additions to the Participant’s accounts under this Plan and in all other defined contribution plans maintained by an Employer shall not exceed the lesser of: (A) $46,000 (as adjusted pursuant to
section 415(d) of the Code) and (B) 100% of the Participant’s compensation for such Plan Year. 
 If the amount to be allocated to
a Participant’s accounts pursuant to Section 7.3 (relating to allocations of contributions among Participant’s accounts) for a Plan Year would exceed the limitation set forth in this Section 7.4, then such excess shall be reduced
before allocations are made to the Participant’s accounts. If, in any Plan Year, the annual additions actually allocated to the Participant’s accounts exceed the limitation set forth in this Section 7.4, then such annual additions
shall be corrected in accordance with the Employee Plans Compliance Resolution System of the Internal Revenue Service. 

  
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 For purposes of this Section 7.4, the “annual additions” for a Plan Year to a
Participant’s accounts in this Plan and in any other defined contribution plan maintained by an Employer is the sum during such Plan Year of: 

(a) the amount of Employer contributions (including Before-Tax Contributions and Designated Roth Contributions and excluding
any Default Before-Tax Contributions that are withdrawn pursuant to paragraph (c)(ii) of Section 3.2) allocated to the Participant’s accounts, excluding, however, (X) Before-Tax Contributions and Designated Roth Contributions that are
“catch-up contributions” made pursuant to section 414(v) of the Code, (Y) excess deferrals that are distributed in accordance with section 402(g) of the Code and (Z) restorative payments (within the meaning of section
1.415(c)-1(b)(2)(ii)(C) of the Regulations), 
 (b) the amount of forfeitures allocated to the Participant’s accounts,

 (c) the amount of Employee contributions allocated to the Participant accounts, but excluding any rollover contributions,
direct transfers or loan repayments, and 
 (d) the contributions allocated on behalf of the Participant to any individual
medical benefit account (as defined in section 415(l) of the Code) or, if the Participant is a key employee within the meaning of section 419A(d)(3) of the Code, to any post-retirement medical benefits account established pursuant to section
419A(d)(1) of the Code. 
 For purposes of this Section 7.4, “defined contribution plan” shall have the meaning set forth in
section 415 of the Code and Regulations, and the term “Employer” shall include all Affiliates except that in defining Affiliates “more than 50 percent” shall be substituted for “at least 80 percent” where required by
section 415(g) of the Code. In addition, for purposes of this Section 7.4, “compensation” shall mean a Participant’s compensation as defined under section 415(c)(3) of the Code (as amended from time to time). 

  
 41 

 Section 7.5. Correction of Error. 

If it comes to the attention of the Administrator that an error has been made in any of the allocations prescribed by this Article or an error
has been made in any other respect, appropriate adjustment shall be made to the accounts of all Participants and designated Beneficiaries that are affected by such error, except that no adjustment need be made with respect to any Participant or
Beneficiary whose account has been distributed in full prior to the discovery of such error. 
 ARTICLE 8 

WITHDRAWALS AND DISTRIBUTIONS 

Section 8.1. Withdrawals and Distributions Prior to Termination of Employment. 

(a) Hardship Withdrawals. An Employee who has not attained age 59 1⁄2 may make a request by calling the VRU, or in such other manner as may be prescribed by the Administrator, to withdraw as of any date all or a portion of the balance of his or her Before-Tax Contributions Account
(other than earnings credited to such account after December 31, 1988), Catch-Up Contributions Account and Employer Matching Contributions Account only if the Participant has incurred a financial hardship, except that while any loan to the
Participant under Section 8.2 remains outstanding, the amount available for withdrawal under this paragraph (a) shall be the balance in such account less the balance of all outstanding loans to the Participant. The determination of the
existence of financial hardship and the amount required to be distributed to satisfy the need created by the hardship will be made by the Administrator in a uniform and non-discriminatory manner subject to the
following rules: 
 (A) A financial hardship shall be deemed to exist if, and only if, the Participant certifies to the
Committee that the financial need is on account of: 
  

	 	(i)	medical expenses described in section 213(d) of the Code incurred or anticipated to be incurred by the Participant, the Participant’s Spouse or any dependents of the Participant (as defined in section 152 of the
Code) or primary beneficiary; 

  
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	 	(ii)	funeral or burial expenses incurred by the Participant for the Participant’s deceased parent, Spouse, children or dependent (as defined in section 152 of the Code, without regard to section 152(d)(1)(B) of the
Code) or primary beneficiary; 

  

	 	(iii)	the purchase (excluding mortgage payments) of a principal residence of the Participant; 

  

	 	(iv)	the payment of tuition, related educational fees, and room and board expenses for up to the next twelve months of post-secondary education for the Participant, the
Participant’s Spouse, children or dependents (as defined in section 152 of the Code, without regard to sections 152(b)(1) and (2) and 152(d)(1)(B) of the Code) or primary beneficiary; 

 

	 	(v)	the need to prevent eviction of the Participant from his or her principal residence or foreclosure of mortgage of the Participant’s principal residence; or 

 

	 	(vi)	expenses for the repair of damage to the Participant’s principal residence that would qualify for the casualty deduction under section 165 of the Code (determined without regard to whether the loss exceeds 10% of
adjusted gross income). 

 For purposes of the foregoing, an individual is a Participant’s “primary
beneficiary” if the Participant has designated him or her as a “Beneficiary” under Section 8.5 and such individual has an unconditional right to all or a portion of the Participant’s accounts upon the Participant’s
death. 
 (B) A distribution shall be deemed to be necessary to satisfy a financial need of the Participant if, and only if,
the Participant: 
  

	 	(i)	has obtained all distributions, other than hardship withdrawals, and all nontaxable loans under any Employer’s plan in which the Participant participates, and 

 

	 	(ii)	demonstrates to the satisfaction of the Administrator that the distribution is not in excess of the amount of the immediate and heavy financial need, which need shall include amounts necessary to pay any federal, state
and local income taxes, excise taxes and penalties. 

  
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 If a Participant receives a hardship withdrawal pursuant to this paragraph (a), then, in addition
to the cessation of Before-Tax Contributions and After-Tax Contributions required by paragraph (a) of Section 4.1 (relating to initial election regarding regular payroll Before-Tax Contributions), contributions by the Participant to
qualified or nonqualified plans of deferred compensation, including a stock option, stock purchase or similar plan, maintained by an Employer also shall (except where excused by regulation) cease beginning with the first payroll period beginning
after the date on which the Participant receives such hardship withdrawal and continuing until the first payroll period that coincides with or follows the date on which contributions ceased by six months. 

The Participant shall designate the extent to which the hardship withdrawal pursuant to this paragraph (a) are Designated Roth
Contributions from the Participant’s Designated Roth Contributions Account and the extent that such withdrawals are Untaxed Contributions from the Participant Untaxed Contributions Account and in the event that any such designation is not made
or is incomplete, such hardship withdrawals shall be treated as withdrawals of Designated Roth Contributions to the extent Designated Roth Contributions were made to the Plan and, to the extent that the hardship withdrawal exceeds such Designated
Roth Contributions, such hardship withdrawal shall be treated as Untaxed Contributions. 
 (b) Withdrawals After Age 59 1⁄2. An Employee who has attained age 59 1⁄2 may make a request by
calling the VRU, or in such other manner as may be prescribed by the Administrator, to withdraw as of any date an amount which is not greater than the balance of his or her Before-Tax Contributions Account, Catch-Up Contributions Account and
Employer Matching Contributions Account as of the most recent Valuation Date determined by the Administrator, except that while any loan to the Participant under Section 8.2 remains outstanding, the amount available for withdrawal shall be the
balance in such accounts less the balance of all outstanding loans to the Participant. 

  
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 The Participant shall designate the extent to which the withdrawal pursuant to this paragraph
(b) are Designated Roth Contributions from the Participant’s Designated Roth Contributions Account and the extent that such withdrawals are Untaxed Contributions from the Participant’s Untaxed Contributions Account and in the event
that any such designation is not made or is incomplete, such withdrawals shall be treated as withdrawals of Designated Roth Contributions to the extent Designated Roth Contributions were made to the Plan and, to the extent that the withdrawal
exceeds such Designated Roth Contributions, such withdrawal shall be treated as Untaxed Contributions. 
 (c) Withdrawals From the
After-Tax Contributions Account. An Employee may make a request by calling the VRU, or in such other manner as may be prescribed by the Administrator, no more than once during any Plan Year, to withdraw from his or her After-Tax Contributions
Account an amount which is not greater than the balance of the Participant’s After-Tax Contributions Account as of the most recent Valuation Date determined by the Administrator, except that while any loan to the Participant under
Section 8.2 remains outstanding, the amount available for withdrawal shall be the balance in such account less the balance of all outstanding loans to the Participant. 

(d) Withdrawals from the Rollover Account. A Participant may make a request by calling the VRU, or in such other manner as may be
prescribed by the Administrator, to withdraw an amount which is not greater than the balance in his or her Rollover Account as of the most recent Valuation Date determined by the Administrator, except that while any loan to the Participant under
Section 8.2 remains outstanding, the amount available for withdrawal shall be the balance in such account less the balance of all outstanding loans to the Participant. 

  
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 (e) Qualified Reservist Withdrawals. A Participant who is a Qualified Reservist may make a
request by calling VRU, or in such manner as may be prescribed by the Administrator, to withdraw any portion of his or her Before-Tax Contributions Account or his or her Designated Roth Contributions Account, and the amount requested shall not be
subject to the 10 percent additional tax imposed pursuant to section 72(t)(2)(G) of the Code, provided that the amount requested is distributed during the period beginning on the date the Participant is ordered or called to active duty and ending at
the close of his or her active duty. 
 (f) Withdrawals of Employer Matching Contributions for Members of IBEW Local Union 614.
Notwithstanding any provision in the Plan to the contrary, effective April 16, 2010, a Participant who is a member of a bargaining unit represented by IBEW Local Union 614 and who has completed 60 months as a Participant may elect, in
accordance with procedures established by the Administrator, to receive a distribution of all or any part of his or her Employer Matching Contributions Account, as adjusted for gains, earnings and losses attributable thereto determined as of the
Valuation Date next succeeding the date of receipt of the request for distribution. 
 Additionally, effective April 16, 2010, a
Participant who is a member of a bargaining unit represented by IBEW Local Union 614, regardless of whether he or she has completed 60 months as a Participant, may elect, in accordance with procedures established by the Administrator, to receive a
distribution of all or any part of that portion of the Employer Matching Contributions Account that is derived from Employer Matching Contributions in excess of Employer Matching Contributions allocated to his or her Employer Matching Contributions
Account during the two Plan Years preceding the Plan Year in which the withdrawal takes place, adjusted for gains, earnings and losses attributable thereto determined as of the Valuation Date next succeeding the date of receipt of the request for
distribution. 

  
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 No distribution made pursuant to this paragraph (f) may be for an amount which is less than
the lesser of (i) $200; and (ii) the balance of the Participant’s Employer Matching Contributions Account, as adjusted for gains, earnings and losses attributable thereto. In addition, a Participant may not make more than one
withdrawal pursuant to this paragraph (f) in any Plan Year. 
 (g) Provisions Applicable to All Withdrawals. Any withdrawal made
pursuant to this Section 8.1 shall be made at such time as prescribed by the Administrator and shall be made pro-rata from each of the investment funds in which as of the date of the withdrawal (i) in the case of a withdrawal pursuant to
paragraph (a) or (b) of this Section 8.1, the Participant’s Before-Tax Contributions Account, Catch-Up Contributions Account (and, if applicable, Employer Matching Contributions Account) is invested, (ii) in the case of a
withdrawal pursuant to paragraph (c) of this Section 8.1, the Participant’s After-Tax Contributions Account is invested, (iii) in the case of a withdrawal pursuant to paragraph (d) of this Section 8.1, the
Participant’s Rollover Account is invested, (iv) in the case of a withdrawal pursuant to paragraph (e) of this Section 8.1, the Participant’s Before Tax Contributions Account and Designated Roth Contributions Account, and
(v) the case of a withdrawal pursuant to paragraph (f) of this Section 8.1, the Participant’s Employer Matching Contribution Account. Notwithstanding anything in the Plan to the contrary, the Administrator or the Investment
Office may impose any restrictions it deems necessary or appropriate with respect to withdrawals by individuals who have any portion of their accounts invested in the Employer Stock Fund described in Section 6.2 and who are subject to Rule
16b-3 under section 16 of the Securities Exchange Act of 1934. 

  
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 (h) Dividend Distributions in Respect of the Employer Stock Fund. Dividends shall be
allocated to the accounts of each Participant, any portion of whose account balance is invested in the Employer Stock Fund in accordance with paragraph (b) of Section 7.1, based upon the total number of shares of Common Stock represented
by the Participant’s proportionate share of the Employer Stock Fund as of such date as may be determined from time to time by the Administrator on or before each dividend record date. Cash dividends shall be reinvested in Common Stock (through
the Employer Stock Fund) unless the Participant (or his or her Beneficiary) elects, at the time and in the manner prescribed by the Administrator, to receive a cash distribution in an amount equal to such dividend, payable not later than 90 days
after the end of the Plan Year in which such dividend was paid. 
 Section 8.2. Loans to Participants. 

(a) Making of Loans. Subject to the restrictions set forth in this Section 8.2, the Administrator shall establish a loan program
whereby any Participant who is a party-in-interest (within the meaning of section 3(14) of ERISA) or any Beneficiary who is a party-in-interest and any such Participant’s Beneficiary may request, in the manner and form prescribed by the
Administrator, to borrow funds from the Plan. The principal amount of such loan shall be not less than $1,000 and the aggregate amount of all outstanding loans to a Participant or Beneficiary shall not exceed the lesser of: (1) 50% of the value
of the aggregate of the Participant’s vested account balances as of the Valuation Date coinciding with or immediately preceding the day on which the loan is made; and (2) $50,000, reduced by the excess, if any, of the highest outstanding
loan balances of the Participant under all plans maintained by the Employer during the period of time beginning one year and one day prior to the date such loan is to be made and ending on the date such loan is to be made over the outstanding
balance of loans from all such plans on the date on which such loan was made. 

  
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 (b) Restrictions. Any loan approved by the Administrator pursuant to the preceding
paragraph (a) shall be made only upon the following terms and conditions: 
 (1) The period for repayment of the loan
shall be arrived at by mutual agreement between the Administrator and the Participant but such period shall not exceed five years or, in the case of a loan to acquire a principal place of residence, shall not be less than five years or more than 15
years, from the date of the loan. Such loan may be prepaid at any time, without penalty, by delivery to the Administrator of a check in an amount equal to the entire unpaid balance of such loan. No partial prepayment shall be permitted. Except as
otherwise provided under uniform and nondiscriminatory procedures established by the Administrator, any loan to a Participant who is an Employee is due in full immediately after termination of employment. 

(2) No loan shall be made to a Participant who is an Employee unless such Participant consents to have such loan repaid in
substantially equal installments deducted from the regular payments of the Participant’s compensation during the term of the loan. A Participant who (a) was an Employee at the time the Participant received a loan from the Plan, (b) is
no longer an Employee and no longer receives compensation from an Employer, but (c) continues to perform services for an Employer, shall consent, either at the time the loan is taken or prior to the date prescribed by the Administrator, to have
the balance of any loan outstanding at the time the Participant no longer is an Employee repaid in substantially equal installments over the remaining life of the loan. Such installments shall be paid in the manner specified by the Administrator.

 (3) Each loan shall be evidenced by the Participant’s collateral promissory note, in the form prescribed by the
Administrator, for the amount of the loan, with interest, payable to the order of the Plan, and shall be secured by an assignment of 50% of the Participant’s vested account balance. 

(4) Each loan shall bear a fixed interest rate commensurate with the interest rates then being charged by persons in the
business of lending money for loans made under similar circumstances, as determined by the Administrator. 
 (5) Except as
otherwise provided in this Plan, no withdrawal (other than a withdrawal from a Participant’s accounts to the extent that such withdrawal would not reduce the Participant’s vested account balances to less than the then outstanding balance
of any loan to such Participant or such higher amount determined by the Administrator to be appropriate security for such loan) or distribution shall be made to any Participant who has borrowed from the Trust, or to a Beneficiary of any such
Participant, unless and until the loan, including interest, has been repaid. 
 (6) A charge shall be made against the
account of each Participant requesting a loan equal to such reasonable loan application fee (and loan acceptance fee, if required by the Administrator) as shall be set from time to time by the Administrator. 

(7) A Participant is permitted only one loan in any calendar year, provided, however, that no more than five loans to a
Participant may be outstanding at any time, except that for a Participant described in the following sentence, no more than three loans may be outstanding at any time (for the period beginning April 1, 2009 and ending August 31, 2010, only
one of such outstanding loans may be for the purpose of acquiring a principal place of residence and only two of such outstanding loans may be for other 

  
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purposes). A Participant described in the preceding sentence is any of the following: (A) a Participant who is a member of a bargaining unit represented by IBEW Local Union 15, (B) a
Participant who is employed at Byron in Nuclear Security and is a member of United Security System Union Local 1, (C) a Participant who is employed at Oyster Creek in Nuclear Security and is a member of United Government Security Officers of
America Local 17, (D) a Participant who is employed at Three Mile Island in Nuclear Security in Nuclear Security and is a member of United Government Security Officers of America Local 18, and (E) a Participant who is classified by an
Employer as a management employee. 
 (8) Loan repayments shall be invested in the various investment funds as elected by the
Participant. 
 (9) The Administrator may, in its sole discretion, restrict the amount to be disbursed pursuant to any loan
request to the extent it deems necessary to take into account any fluctuations in the value of a Participant’s accounts since the Valuation Date immediately preceding the date on which such loan is to be made. 

(10) Any restrictions the Administrator or the Investment Office determines are necessary or appropriate with respect to loans
requested by individuals who have any portion of their accounts invested in the Employer Stock Fund described in Section 6.2 and who are subject to Rule 16b-3 under section 16 of the Securities Exchange Act of 1934. 

If any loan or portion of a loan made to a Participant under the Plan, together with the accrued interest thereon, is in default (taking into
account any grace period permitted by law, and as determined by the Administrator), the Administrator shall take appropriate steps to collect on the note and foreclose on the security. If upon a Participant’s termination of employment entitling
the Participant to a distribution under Section 8.3 (relating to distributions upon termination of employment), death or retirement, any loan or portion of a loan made to such Participant under the Plan, together with the accrued interest
thereon, remains unpaid, such unpaid amount may be repaid to the Plan no later than the last day of the calendar quarter following the calendar quarter in which such termination of employment occurred or as of such later date or dates permitted
under uniform and nondiscriminatory procedures established by the Administrator. If full repayment is not so made, an amount equal to the unpaid portion of such loan, together with the accrued interest thereon, shall be charged to the
Participant’s accounts after all other adjustments required under the Plan, but before any distribution pursuant to Section 8.3 (relating to distributions upon termination of employment). 

  
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 (c) Loan Subaccount. The Trustee shall establish and maintain a loan subaccount on behalf
of each Participant or Beneficiary to whom a loan is made under this Section 8.2. Such subaccount shall represent the investment of the Participant’s or Beneficiary’s account in such loan. As of the Valuation Date immediately
preceding the date on which a loan is approved, the Participant’s or Beneficiary’s loan subaccount shall be credited with the amount of the loan and thereafter shall be debited with repayments of the principal of such loan. The various
accounts maintained for the Participant or Beneficiary shall be invested in the loan subaccount and debited by the amount of the loan and credited with payments of interest on, and repayments of principal of, such loan in accordance with uniform
rules established by the Administrator. 
 (d) Sarbanes-Oxley. Notwithstanding any provision of the Plan to the contrary, the
Administrator reserves the right to deny the request of a Participant for a loan that, in the judgment of the Administrator, would violate any provision of the Sarbanes-Oxley Act of 2002. 

Section 8.3. Distributions Upon Termination of Employment. 

(a) Termination of Employment under Circumstances Entitling Participant to Full Distribution of His or Her Account Balance. If a
Participant terminates employment, the Participant, or his or her designated Beneficiary, as the case may be, shall be entitled to receive the entire balance of the Participant’s accounts, at the time set forth in Section 8.4 (relating to
time of distribution) and in the manner set forth in paragraph (b) of this Section 8.3. 

  
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 (b) Form of Distribution. (1) Subject to paragraph (d) of this Section 8.3
(relating to small benefits payable in lump sum), any distribution to which a Participant or Beneficiary, as the case may be, becomes entitled upon termination of employment shall be distributed by whichever of the following forms of distribution
the Participant or Beneficiary, as the case may be, elects by calling the VRU, or in such other manner as may be prescribed by the Administrator: 
  

	 	(A)	By payment in a lump sum. 

  

	 	(B)	By payment in a series of approximately equal annual, quarterly, or monthly installments, over a period of up to 15 years; provided that installments shall not be available with respect to amounts invested in the CNA
1997 guaranteed investment contract. 

 A Participant who elected to receive distribution of his or her vested account balance
in the form of installments may, at any time after such election is made, elect to receive the remaining amount of his or her vested account balance in the form of a lump sum payment. If no election is made by a Participant or Beneficiary, as the
case may be, as to the form of distribution, the Participant’s vested account balance shall be distributed in the form of a lump sum payment. 

The amount distributed hereunder shall be paid in cash, except that if the Participant’s account is paid in a lump sum, then the
Participant may request that all of his or her account invested in the Employer Stock Fund be distributed in whole shares of Common Stock held in such Fund with any fractional share being paid in cash. The number of shares of Common Stock to be
distributed shall be based on the current fair market value of a share of Common Stock as determined by the Trustee under Section 7.2 (relating to allocation of net income of Trust Fund and fluctuation in value of Trust assets) as of the
Valuation Date coinciding with or immediately preceding the date payment of the Participant’s account is to be made. Requests for distribution in the form of Common Stock shall be made at such time and in such manner as the Administrator shall
determine under rules and regulations which are uniformly applied. 
 Notwithstanding the preceding paragraphs, no distribution shall be
made in the form of installments with respect to a Participant’s Rollover Account that was established to hold the amount distributed or directly transferred from the Commonwealth Edison Company Employee Stock Ownership Plan upon such
plan’s termination if the Participant elected not to receive distribution of such amount until his or her 65th birthday. 

  
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 (c) Notice of Availability of Election of Optional Forms of Benefits. No less than 30 days
(or such shorter period as permitted by law) and no more than 90 days before distribution is to be made hereunder, the Administrator, or its designee, shall explain to the Participant that he or she may elect either form of distribution set forth in
paragraph (b) of this Section 8.3. Such explanation shall include a general description of the eligibility conditions and other material features of the optional forms of distribution provided under the Plan. Notwithstanding the first
sentence of this paragraph (c), distribution may commence less than 30 days after the description described above is given, provided that: (i) the Administrator, or its designee, clearly informs the Participant that the Participant has a right
to a period of at least 30 days after receiving the explanation to consider the decision of whether or not to elect a distribution (and, if applicable, a particular distribution option), and (ii) the Participant, after receiving the
explanation, affirmatively elects a distribution. The description referred to in this paragraph (c), as well as the explanation of the participant’s right to a period of at least 30 days to consider such explanation before electing a
distribution, shall be provided to the Participant through the VRU or in such other manner prescribed by the Administrator. 
 (d) Small
Benefits Payable in Lump Sum. Notwithstanding any provision of the Plan to the contrary, if the vested amount of the Participant’s account balances does not exceed $5,000, not including the value of the Participant’s Rollover Account
or, for distributions occurring on or after March 28, 2005, $1,000, including the value of the Participant’s Rollover Account (such amount referred to herein as the “small benefit amount”), such vested amount shall be distributed
in a lump sum cash payment as soon as administratively practicable after the Participant’s termination of employment in accordance with such procedures as may be established by the Administrator. 

  
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 (e) Direct Rollover Option. In the case of a distribution from the Plan (excluding any
amount offset against the Participant’s account balance to repay the outstanding balance of any unpaid loan) which is an “eligible rollover distribution” within the meaning of section 402(c)(4) of the Code, a Participant (or surviving
Spouse of a Participant or a former Spouse who is an alternate payee under a qualified domestic relations order as defined in section 414(p) of the Code) may elect that all or any portion of such distribution shall be directly transferred as a
rollover contribution from this Plan to (i) an individual retirement account described in section 408(a) of the Code, (ii) an individual retirement annuity described in section 408(b) of the Code, (iii) an annuity plan described in
section 403(a) of the Code, (iv) an annuity contract described in section 403(b) of the Code, (v) a retirement plan qualified under section 401(a) of the Code (the terms of which permit the acceptance of rollover contributions),
(vi) an eligible plan under section 457(b) of the Code which is maintained by an eligible employer described in section 457(e)(1)(A) of the Code (the terms of which permit the acceptance of rollover contributions) or (vii) effective
January 1, 2008, a Roth IRA described in section 408A of the Code. However, in the case of a distribution of a Participant’s After-Tax Contributions Account prior to January 1, 2007, such distribution shall only be directly
transferred as a rollover contribution from this Plan to an account or annuity described in section 408 of the Code, or to such a retirement or annuity plan described in section 401(a) or 403(a) of the Code that is a defined contribution plan that
agrees to separately account for amounts so transferred, including separately accounting for the portion of such amount which is includible in gross income and the portion of such distribution which is not so includible. In the case of a
distribution of a Participant’s After-Tax Contributions Account on or after January 1, 2007, such distribution shall only be directly transferred as a rollover 

  
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contribution to an account or annuity described in section 408 of the Code, or to such a qualified retirement or annuity plan described in section 401(a) or 403(a) of the Code that agrees to
separately account for amounts so transferred, including separately accounting for the portion of such amount which is includible in gross income and the portion of such distribution which is not so includible. Notwithstanding any provision of this
paragraph (e), in the case of any eligible rollover distribution that includes all or any portion of the Participant’s Designated Roth Contributions Account, a Participant or surviving Spouse or a former Spouse who is an alternate payee under a
qualified domestic relations order as defined in section 414(p) of the Code may elect to transfer such portion only to another plan which accounts for Designated Roth Contributions described in section 402A of the Code or to a Roth IRA described in
section 408A of the Code and only to the extent the rollover is permitted by the rules of section 402(c) of the Code. In addition, in the case of a distribution described in the preceding sentence that occurs on or after January 1, 2008, a
Beneficiary who is not the surviving Spouse of the Participant may elect that all or any portion of such distribution shall be directly transferred as a rollover contribution from this Plan to (i) an individual retirement account described in
section 408(a) of the Code, (ii) an individual retirement annuity described in section 408(b) of the Code or (iii) effective January 1, 2010, a Roth IRA described in section 408A of the Code, that, in either case, is established for
the purpose of receiving such distribution on behalf of the Beneficiary. 
 Section 8.4. Time of Distribution. 

A Participant who has terminated employment shall commence receiving distribution of his or her vested account balance as soon as
administratively practical after the Valuation Date coinciding with or immediately following the date on which the Participant attains age 65, except as provided below. 

  
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	 	(1)	Early Distribution. Except as provided in subparagraph (7), a Participant whose Termination Date is prior to his or her 65th birthday may elect by calling the VRU, or in such other manner as may be prescribed by
the Administrator, prior to his or her termination of employment to have distribution of his or her vested account balance commence within 60 days after the Valuation Date coinciding with or immediately following the Participant’s Termination
Date. 

  

	 	(2)	Deferral of Distribution. A Participant may elect by calling the VRU, or in such other manner as may be prescribed by the Administrator, which election shall be made at the time prescribed by the Administrator,
that distribution of his or her vested account balance commence as soon as practicable after the Participant’s attainment of age 70 1⁄2.

  

	 	(3)	Elections After Termination Date. Except as provided in subparagraph (7), a Participant who has terminated employment and whose distribution is to commence either after the Participant’s attainment of age 65
or 70 1⁄2 may elect at any time by calling the VRU, or in such other manner as may be prescribed by the Administrator, to have distribution of his or her
vested account balance made within 60 days after the date such election is made. 

  

	 	(4)	Required Beginning Date. Distributions paid or commencing during the Participant’s lifetime shall commence not later than April 1 of the calendar year following the calendar year in which the
Participant attains age 70 1⁄2, except that distributions made to a Participant who is not a “five percent owner” (as defined in section 416(i) of
the Code) may commence on April 1 of the calendar year following the later of the calendar year in which the Participant attains age 70 1⁄2 or the
calendar year in which the Participant retires. Notwithstanding any provision of the Plan to the contrary, any distributions required by this subparagraph shall be made not less rapidly than in accordance with the final Regulations under
Section 401(a)(9). The Participant shall designate the extent to which the distribution of Before-Tax Contributions pursuant to this subparagraph 4 are Designated Roth Contributions from the Participant’s Designated Roth Contributions
Account and the extent that such withdrawals are Untaxed Contributions from the Participant’s Untaxed Contributions Account and in the event that any such designation is not made or is incomplete, such distribution shall be treated as a
distribution of Designated Roth Contributions to the extent Designated Roth Contributions were made to the Plan and, to the extent that the distribution of Before-Tax Contributions exceeds such Designated Roth Contributions, such distribution shall
be treated as Untaxed Contributions. 

  

	 	(5)	 Distributions Commencing After Participant’s Death. Distributions commencing after the Participant’s death shall be completed within
five years after the death of the Participant, except that (i) effective with respect to any Participant whose death occurs on or after January 1, 1995, regardless of when such Participant’s employment terminated, if the
Participant’s Beneficiary is the Participant’s Spouse, distribution may be deferred until the date on which the Participant would have attained age
70 1⁄2 had he or she survived and (ii) if the Participant’s Beneficiary is a natural person other than the Participant’s Spouse and
distributions commence not 

  
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later than one year after the Participant’s death, such distributions may be made over a period not longer than the life expectancy of such Beneficiary. If at the time of the
Participant’s death, distribution of the Participant’s benefit has commenced, the remaining portion of the Participant’s benefit shall be paid in the manner elected by the Participant’s Beneficiary, but at least as rapidly as was
the method of distribution being used prior to the Participant’s death. 

  

	 	(6)	Distribution of Rollover Account After Termination Date. A Participant who has terminated employment or the Beneficiary of such Participant, as the case may be, may elect by calling the VRU, or in such other
manner as may be prescribed by the Administrator prior to the time his or her vested account balance is distributed under this Section 8.4 to have distribution of the balance of his or her Rollover Account commence at such prior time as the
Participant or Beneficiary shall elect, provided that, while any loan to the Participant under Section 8.2 remains outstanding, such distribution shall be made only to the extent that the balance of such Participant’s vested account
balance remaining after such distribution will equal or exceed the balance of all outstanding loans to the Participant. 

  

	 	(7)	Compliance with Section 401(a)(9) of the Code. Notwithstanding any provision of the Plan to the contrary, all distributions will be made in accordance with section 401(a)(9) of the Code and the regulations
promulgated thereunder, including the minimum distribution incidental death benefit requirement thereof. Notwithstanding the foregoing, any amount that would be a required minimum distribution described in section 401(a)(9) of the Code which is
attributable to the 2009 calendar year will not be distributed to a Participant, or his or her Beneficiary, as applicable, unless such individual elects to receive such distribution. In addition, the five-year period described in subparagraph
(5) above shall be determined without regard to calendar year 2009. 

 Notwithstanding anything contained herein to the
contrary and except as provided in subparagraph (4) above, in the event that the recordkeeper for the Plan is changed, distributions may be made at such time as prescribed by the Administrator in order to accommodate the transfer of records to
the new recordkeeper. 
 Section 8.5. Designation of Beneficiary. 

Each Participant shall have the right to designate a Beneficiary or Beneficiaries (who may be designated contingently or successively and that
may be an entity other than a natural person) to receive any distribution to be made under Section 8.3 (relating to distributions upon termination of employment) upon the death of such Participant or, in the case of a Participant who dies
subsequent to termination of his or her employment but prior to the distribution of the entire 

  
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amount to which he or she is entitled under the Plan, any undistributed balance to which such Participant would have been entitled, provided, however, that no such designation (or
change thereof) shall be effective if the Participant was married on the date of the Participant’s death unless such designation (or change thereof) was consented to at the time of such designation (or change thereof) by the person who was the
Participant’s Spouse, in writing, acknowledging the effect of such consent and witnessed by a notary public or a Plan representative, or it is established to the satisfaction of the Administrator that such consent could not be obtained because
the Participant’s Spouse cannot be located or such other circumstances as may be prescribed in Regulations. Subject to the preceding sentence, a Participant may from time to time, without the consent of any Beneficiary, change or cancel any
such designation. Such designation and each change therein shall be made in the form prescribed by the Administrator and shall be filed with the Administrator. A Participant’s beneficiary designation in effect under the PECO Energy Company
Employee Savings Plan immediately prior to March 31, 2001 shall remain in effect under the Plan on and after March 31, 2001 until such time as such designation is changed or canceled in accordance with this Section 8.5. If (i) no
Beneficiary has been named by a deceased Participant, (ii) such designation is not effective pursuant to the proviso contained in the first sentence of this section, or (iii) the designated Beneficiary has predeceased the Participant, any
undistributed balance of the deceased Participant shall be distributed by the Trustee at the direction of the Administrator (a) to the surviving Spouse of such deceased Participant, if any, or (b) if there is no surviving Spouse, to the
surviving children of such deceased Participant, if any, in equal shares, or (c) if there is no surviving Spouse or surviving children, to the surviving parents of such deceased Participant, if any, in equal shares, or (d) if there is no
surviving Spouse, surviving children or surviving parents, to the executor or administrator of the estate of such deceased Participant or (e) if no executor or administrator has been appointed for the estate of such

  
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deceased Participant within six months following the date of the Participant’s death, in equal shares to the person or persons who would be entitled under the intestate succession laws of
the state of the Participant’s domicile to receive the Participant’s personal estate. The marriage of a Participant shall be deemed to revoke any prior designation of a Beneficiary made by him or her and a divorce shall be deemed to revoke
any prior designation of the Participant’s divorced Spouse if written evidence of such marriage or divorce is timely received by the Administrator. 

Section 8.6. Distributions to Minor and Disabled Distributees. 

Any distribution under this Article that is payable to a distributee who is a minor or to a distributee who, in the opinion of the
Administrator, is unable to manage his or her affairs by reason of illness or mental incompetency may be made to or for the benefit of any such distributee at such time consistent with the provisions of Section 8.4 (relating to time of
distribution) and in such of the following ways as the legal representative of such distributee shall direct: (a) directly to any such minor distributee if, in the opinion of such legal representative, the distributee is able to manage his or
her affairs, (b) to such legal representative, (c) to a custodian under a Uniform Gifts to Minors Act for any such minor distributee, or (d) to some near relative of any such distributee to be used for the latter’s benefit.
Neither the Administrator nor the Trustee shall be required to see to the application by any third party other than the legal representative of a distributee of any distribution made to or for the benefit of such distributee pursuant to this
Section. 
 Section 8.7. “Lost” Participants and Beneficiaries. 

If within a period of five years following the death or other termination of employment of any Participant the Administrator in the exercise
of reasonable diligence has been unable to locate the person or persons entitled to benefits under this Article 8, the rights of such person or persons shall be forfeited, provided, however, that the Plan shall reinstate and pay to
such person or 

  
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persons the amount of the benefits so forfeited upon a claim for such benefits made by such person or persons. The amount to be so reinstated shall be obtained from the total amount that shall
have been forfeited pursuant to Section 8.3 (relating to distribution upon termination of employment) during the Plan Year that the claim for such forfeited benefit is made. If the amount to be reinstated exceeds the amount of such forfeitures,
the Employer in respect of whose Employee the claim for forfeited benefit is made shall make a contribution in an amount equal to the remainder of such excess. Any such contribution shall be made without regard to whether or not the limitations set
forth in Section 4.5 (relating to limitation on Employer contributions) will be exceeded by such contribution. 

Section 8.8. Death Benefits Under USERRA 

Effective January 1, 2007, in the case of a Participant who dies while performing Military Service, the Beneficiaries of such Participant
shall be entitled to any additional benefits, if any, (other than benefit accruals relating to the period of qualified military service) provided under the Plan had the Participant resumed employment with an Employer and then terminated such
employment on account of such Participant’s death. 
 ARTICLE 9 

PARTICIPANTS’ STOCKHOLDER RIGHTS 

Section 9.1. Voting Shares of Common Stock. 

Each Participant and Beneficiary shall be entitled to direct the Trustee as to the exercise of any voting rights attributable to shares of
Common Stock then allocated to his or her account and the Trustee shall vote such shares according to the voting directions of the Participant or Beneficiary that have been timely submitted to the Trustee on forms provided by the Trustee for such
purpose. Participants and Beneficiaries shall be permitted to direct the Trustee as to the exercise of any voting rights, including, but not limited to, any corporate matter that involves the 

  
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voting of shares of Common Stock with respect to the approval or disapproval of any corporate merger or consolidation, recapitalization, reclassification, liquidation, dissolution, sale of
substantially all assets of a trade or business, or similar transaction prescribed in Regulations. The Trustee shall with respect to any matter vote the shares of Common Stock credited to Participants’ accounts with respect to which the Trustee
does not timely receive voting instructions in the same proportion as to shares the Trustee has received voting instructions. Written notice of any meeting of stockholders of the Company and a request for voting instructions shall be given by the
Administrator or the Trustee, at such time and in such manner as the Administrator shall determine, to each Participant or Beneficiary entitled to give instructions for voting shares of Common Stock at such meeting. The Administrator shall establish
and pay for a means by which Participants and Beneficiaries can expeditiously deliver such voting instructions to the Trustee. All instructions delivered by Participants or Beneficiaries shall be confidential and shall not be disclosed to any
person, including the Employer. 
 Section 9.2. Tender Offers. 

(a) In the event a tender offer is made generally to the stockholders of the Company to transfer all or a portion of their shares of Common
Stock in return for valuable consideration, including but not limited to, offers regulated by section 14(d) of the Securities Exchange Act of 1934, as amended, each Participant or Beneficiary shall be entitled to direct the Trustee regarding
how to respond to any such tender offer with respect to the number of shares of Common Stock then allocated to his or her account and the Trustee shall vote such shares according to the voting directions of the Participant or Beneficiary that have
been timely submitted to the Trustee on forms provided by the Trustee for such purpose. A Participant or Beneficiary shall not be limited in the number of directions to tender or withdraw from tender that he or she can give, but shall not have the
right to give directions to tender or withdraw from tender after a reasonable time 

  
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established by the Trustee pursuant to paragraph (c) of this Section 9.2. The Trustee shall with respect to a tender offer decline to vote the shares of Common Stock credited to
Participants’ accounts with respect to which the Trustee does not timely receive directions on how to respond to any such tender offer. All such directions shall be confidential and shall not be disclosed to any person, including the Employer.

 (b) Within a reasonable time after the commencement of a tender offer, the Administrator shall provide to each Participant and
Beneficiary: 
  

	 	(i)	the offer to purchase as distributed by the offeror to the stockholders of the Company, 

  

	 	(ii)	a statement of the shares of Common Stock allocated to his or her account, and 

  

	 	(iii)	directions as to the means by which a Participant can give directions with respect to the tender offer. 

The Administrator shall establish and pay for a means by which a Participant and Beneficiary can expeditiously deliver directions to the
Trustee with respect to a tender offer. The Administrator shall transmit or cause to be transmitted to the Trustee aggregate numbers of shares to be tendered or withheld from tender representing directions of Participants and Beneficiaries. The
Administrator, at its election, may engage an agent to receive directions from Participants and Beneficiaries and transmit them to the Trustee. 

(c) The Trustee may establish a reasonable time, taking into account the time restrictions of the tender offer, after which it shall not
accept directions of Participants or Beneficiaries. 
 (d) Notwithstanding the foregoing, with respect to a tender offer for the purchase or
exchange of less than five percent (5%) of the outstanding shares of Common Stock, the Investment Office shall direct the Trustee with respect to the sale, exchange or transfer of the shares of Common Stock held in the Trust Fund, and the
Trustee shall follow the direction of the Investment Office. 

  
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 ARTICLE 10 

SPECIAL PARTICIPATION AND DISTRIBUTION RULES RELATING 

TO REEMPLOYMENT OF TERMINATED EMPLOYEES AND 

EMPLOYMENT BY RELATED ENTITIES 

Section 10.1. Change of Employment Status. 

If an Employee who is not a Participant becomes eligible to participate because of a change in his or her employment status, such Employee
shall become a Participant as of the date of such change if either the Employee is not a member of a bargaining unit represented by IBEW Local Union 15 or the Employee has satisfied the eligibility service requirement set forth in Section 3.1;
otherwise the Employee shall become a Participant in accordance with Section 3.1 following satisfaction of the eligibility service requirement. 

Section 10.2. Reemployment of an Eligible Employee Whose Employment Terminated Prior to His or Her Becoming a Participant.

 (a) If the employment of an Eligible Employee who is a member of a bargaining unit represented by IBEW Local Union 15 terminated before
the Employee satisfied the eligibility service requirement set forth in Section 3.1 and such Employee is thereafter reemployed by an Employer, such Employee shall be eligible to become a Participant in accordance with Section 3.1. 

(b) If the employment of an Eligible Employee who is a member of a bargaining unit represented by IBEW Local Union 15 terminated after he or
she had satisfied the eligibility service requirement set forth in Section 3.1 but prior to becoming a Participant is reemployed by an Employer, he or she shall not be required to satisfy again such requirement and shall be eligible to become a
Participant upon filing an application in accordance with Section 3.2 (relating to application for Before-Tax Contributions and After-Tax Contributions). 

  
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 Section 10.3. Reemployment of a Terminated Participant. 

If a terminated Participant is reemployed, the Participant shall not be required to satisfy again the eligibility service requirement set
forth in Section 3.1 and shall again become a Participant upon filing an application in accordance with Section 3.2 (relating to application for Before-Tax Contributions and After-Tax Contributions). 

Section 10.4. Employment by an Affiliate. 

If an individual is employed by an Affiliate, then any period of such employment shall be taken into account solely for the purposes of
determining whether and when such individual is eligible to participate in the Plan under Article 3 (relating to participation), when such individual has retired or otherwise terminated his or her employment for purposes of Article 8 (relating to
withdrawals and distributions) to the same extent it would have been had such period of employment been as an Employee of his or her Employer. 

Section 10.5. Leased Employees. 

A leased employee (as defined below) shall not be eligible to participate in the Plan. If an individual who performed services as a leased
employee (as defined below) of an Employer or an Affiliate becomes an Employee, or if an Employee becomes such a leased employee, then any period during which such services were so performed shall be taken into account solely for the purposes of
determining whether and when such individual is eligible to participate in the Plan under Article 3 (relating to participation) and determining when such individual has retired or otherwise terminated his or her employment for purposes of Article 8
(relating to withdrawals and distributions) to the same extent it would have been had such service been as an Employee. This Section shall not apply to any period of service during which such a leased employee was covered

  
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by a plan described in section 414(n)(5) of the Code. Any contributions or benefits provided under such plan to a leased employee by his or her leasing organization shall be treated as provided
under this Plan and shall be taken into account under Section 7.4 (relating to limitation on allocations imposed by Section 415 of the Code) to the extent required under section 1.415(a)-1(f)(3) of the Regulations. For purposes of this
Plan, a “leased employee” shall mean any person who is not an employee of an Employer and who pursuant to an agreement between an Employer or Affiliate has performed services for an Employer or an Affiliate on a substantially full-time
basis for a period of at least one year, which services were performed under the primary direction or control of an Employer or an Affiliate. 

Section 10.6. Reemployment of Veterans. 

(a) General. The provisions of this Section shall apply in the case of the reemployment by an Employer of an Eligible Employee, within
the period prescribed by the Uniformed Service Employment and Reemployment Rights Act (“USERRA”), after the Employee’s completion of a period of Military Service. The provisions of this Section are intended to provide such Employees
with the rights required USERRA and section 414(u) of the Code, and shall be interpreted in accordance with such intent. 
 (b) Make Up
of Before-Tax and After-Tax Contributions. Such Employee shall be entitled to make contributions under the Plan (“Make-Up Employee Contributions”), in addition to Before-Tax and After-Tax Contributions which the Employee elects to have
made under the Plan pursuant to Section 4.1 (relating to Before-Tax Contributions). From time to time while employed by an Employer, such Employee may elect to contribute Make-Up Employee Contributions during the period beginning on the date of
such Employee’s reemployment and ending on the earlier of: 
  

	 	(i)	the end of the period equal to the product of three and such Employee’s period of Military Service, and 

  

	 	(ii)	the fifth anniversary of the date of such reemployment. 

  
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 Such Employee shall not be permitted to contribute Make-Up Employee Contributions to the Plan in
excess of the amount which the Employee could have elected to have made under the Plan in the form of Before-Tax and After-Tax Contributions if the Employee had continued in employment with his or her Employer during such period of Military Service.
Such Employee shall be deemed to have earned “Compensation” from his or her Employer during such period of Military Service for this purpose in the amount prescribed by sections 414(u)(2)(B) and 414(u)(7) of the Code. The manner in which
an Eligible Employee may elect to contribute Make-Up Employee Contributions pursuant to this paragraph (b) shall be prescribed by the Administrator. 

(c) Make Up of Employer Matching Contributions. An Eligible Employee who contributes Make-Up Employee Contributions as described in
paragraph (b) shall be entitled to an allocation of Employer Matching Contributions (“Make-Up Matching Contributions”) in an amount equal to the amount of Employer Matching Contributions which would have been allocated to the Employer
Matching Contributions Account of such Eligible Employee under the Plan if such Make-Up Employee Contributions had been made in the form of Before-Tax or After-Tax Contributions (as applicable) during the period of such Employee’s Military
Service. The amounts necessary to make such allocation of Make-Up Matching Contributions shall be derived from any forfeitures not yet applied towards Employer Matching Contributions for the Plan Year in which the Make-Up Employee Contributions are
made, and if such forfeitures are not sufficient for this purpose, then the Eligible Employee’s Employer shall make a special contributions which shall be utilized solely for purposes of such allocation. 

  
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 (d) Application of Limitations and Nondiscrimination Rules. Any contributions made by an
Eligible Employee or an Employer pursuant to this Section on account of a period of Military Service in a prior Plan Year shall not be subject to the limitations prescribed by Sections 4.2, 4.5 and 7.4 of the Plan (relating to sections 402(g), 404
and 415 of the Code) for the Plan Year in which such contributions are made. The Plan shall not be treated as failing to satisfy the nondiscrimination rules of Section 4.4 of the Plan (relating to limitations on contributions for highly
compensated Eligible Employees) for any Plan Year solely on account of any make up contributions made by an Eligible Employee or an Employer pursuant to this Section 10.6. 

Section 10.7 Transfer of Employment to or from Facilities formerly Owned by CEG. Effective as of the Effective time (as
such term is defined in the Merger Agreement), if a Participant who was a Participant on or prior to the Effective Time transfers employment to or is reemployed by an Employer or an Affiliate in a job classification with respect to which similarly
situated employees of such Employer or Affiliate are not eligible to participate in the Plan but are instead eligible to participate in a Company Benefit Plan (as such term is defined in the Merger Agreement) that is intended to be a savings plan
qualified under Section 401(a) or 401(k) of the Code (each such plan, a “CEG Savings Plan”) , then such individual shall upon such transfer or reemployment remain a Participant in the Plan and shall not participate in the CEG Savings
Plan. If a participant in the CEG Savings Plan who was a participant in such plan on or prior to the Effective Time transfers employment to or is reemployed by an Employer or an Affiliate in a job classification with respect to which similarly
situated employees of such Employer or Affiliate are not eligible to participate in such plan but are instead eligible to participate in the Plan, then such individual shall upon such transfer or reemployment remain a participant in the CEG Savings
Plan and shall not participate in the Plan. 

  
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 ARTICLE 11 

ADMINISTRATION 

Section 11.1. The Administrator, the Investment Office and the Corporate Investment Committee. 

(a) The Administrator. The Company acting through its Director, Employee Benefit Plans & Programs, or such other person or
committee appointed by the Chief Human Resources Officer from time to time (such director or other person or committee, the “Administrator”), shall be the “administrator” of the Plan, within the meaning of such term as used in
ERISA. In addition, the Administrator shall be the “named fiduciary” of the Plan, within the meaning of such term as used in ERISA, solely with respect to administrative matters involving the Plan and not with respect to any investment of
the Plan’s assets. The Administrator shall have the following duties, responsibilities and rights: 
  

	 	(i)	The Administrator shall have the duty and discretionary authority to interpret and construe the Plan in regard to all questions of eligibility, the status and rights of Participants, distributees and other persons under
the Plan, and the manner, time, and amount of payment of any distribution under the Plan. Benefits under the Plan shall be paid to a Participant or Beneficiary only if the Administrator, in its discretion, determines that such person is entitled to
benefits. 

  

	 	(ii)	The Administrator shall direct the Trustee to make payments of amounts to be distributed from the Trust under Article 8 (relating to withdrawals and distributions). 

 

	 	(iii)	The Administrator shall supervise the collection of Participants’ contributions made pursuant to Article 5 (relating to Employee contributions) and the delivery of such contributions to the Trustee.

  

	 	(iv)	The Administrator shall have all powers and responsibilities necessary to administer the Plan, except those powers that are specifically vested in the Investment Office, the Corporate Investment Committee or the
Trustee. 

  

	 	(v)	Each Employer shall, from time to time, upon request of the Administrator, furnish to the Administrator such data and information as the Administrator shall require in the performance of its duties. 

  
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	 	(vi)	The Administrator may require a Participant or Beneficiary to complete and file certain applications or forms approved by the Administrator and to furnish such information requested by the Administrator. The
Administrator and the Plan may rely upon all such information so furnished to the Administrator. 

  

	 	(vii)	The Administrator shall be the Plan’s agent for service of legal process and forward all necessary communications to the Trustee. 

(b) Removal of Administrator. The Chief Human Resources Officer shall have the right at any time, with or without cause, to remove the
Administrator (including any member of a committee that constitutes the Administrator). The Administrator may resign and the resignation shall be effective upon delivery of the written resignation to the Chief Human Resources Officer or upon the
Administrator’s termination of employment with the Employers. Upon the resignation, removal or failure or inability for any reason of the Administrator to act hereunder, the Chief Human Resources Officer shall appoint a successor. Any successor
Administrator shall have all the rights, privileges and duties of the predecessor, but shall not be held accountable for the acts of the predecessor. None of the Company, any officer, employee or member of the board of directors of the Company who
is not the Chief Human Resources Officer, nor any other person shall have any responsibility regarding the retention or removal of the Administrator. 

(c) The Investment Office. The Investment Office, shall be the “named fiduciary” of the Plan, within the meaning of such term
as used in ERISA, solely with respect to matters involving the investment of assets of the Plan and, any contrary provision of the Plan notwithstanding, in all events subject to the limitations contained in Sections 404(a)(2) and 404(c) of ERISA and
the terms of the Plan, and all other applicable limitations. The Investment Office shall have the following duties, responsibilities and rights: 
  

	 	(i)	The Investment Office shall be the “named fiduciary” for purposes of designating the investment funds under Section 6.2 and for purposes of appointing one or more investment managers as described in
ERISA. 

  
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	 	(ii)	The Investment Office shall be solely responsible for all matters involving investment of the Employer Stock Fund described in Section 6.2 and no other person shall have any responsibility with respect to
investment of such fund; provided, however, that effective June 21, 2012, the Investment Office has appointed an independent investment manager under section 3(38) of ERISA to manage the investment of the Common Stock in the Employer Stock Fund
and such investment manager (rather than the Investment Office) shall be solely responsible for any and all investment decisions relating thereto. 

  

	 	(iii)	Each Employer shall, from time to time, upon request of the Investment Office, furnish to the Investment Office such data and information as the Investment Office shall require in the performance of its duties.

 (d) The Corporate Investment Committee. The Company acting through the Corporate Investment Committee shall be
responsible for overall monitoring of the performance of the Investment Office. The Corporate Investment Committee and the Company’s Chief Investment Officer shall have the right at any time, with or without cause, to remove one or more
employees of the Exelon Investment Office or to appoint another person or committee to act as Investment Office. Any successor Investment Office employee shall have all the rights, privileges and duties of the predecessor, but shall not be held
accountable for the acts of the predecessor. The power and authority of the Corporate Investment Committee with respect to the Plan shall be limited solely to the monitoring and removal of the employees of the Investment Office and the Corporate
Investment Committee shall have no other duties or responsibilities with respect to the Plan. None of the Company, any officer, employee or member of the board of directors who is not a member of the Corporate Investment Committee, nor any other
person shall have any responsibility regarding the appointment or removal of the employees of Investment Office. 
 (e) Status of
Administrator, the Investment Office and the Corporate Investment Committee. The Administrator, any person acting as, or on behalf of, the Investment Office, and any member of the Corporate Investment Committee may, but need not, be an Employee,
trustee or officer of an Employer and such status shall not disqualify such person from taking any action 

  
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hereunder or render such person accountable for any distribution or other material advantage received by him or her under this Plan, provided that no Administrator, person acting as, or on behalf
of, the Investment Office, or any member of the Corporate Investment Committee who is a Participant shall take part in any action of the Administrator or the Investment Office on any matter involving solely his or her rights under this Plan. 

(f) Notice to Trustee of Members. The Trustee shall be notified as to the names of the Administrator and the person or persons
authorized to act on behalf of the Investment Office. 
 (g) Allocation of Responsibilities. Each of the Administrator, the
Investment Office and the Corporate Investment Committee may allocate their respective responsibilities and may designate any person, persons, partnership or corporation to carry out any of such responsibilities with respect to the Plan. Any such
allocation or designation shall be reduced to writing and such writing shall be kept with the records of the Plan. 
 (h) General
Governance. The Corporate Investment Committee shall elect one of its members as chairman and appoint a secretary, who may or may not be a member of such Committee. All decisions of the Corporate Investment Committee shall be made by the
majority, including actions taken by written consent. The Administrator, the Investment Office and the Corporate Investment Committee may adopt such rules and procedures as it deems desirable for the conduct of its affairs, provided that any such
rules and procedures shall be consistent with the provisions of the Plan. 
 (i) Indemnification. The Employers hereby jointly and
severally indemnify the Administrator, the persons employed in the Exelon Investment Office, the members of the Corporate Investment Committee, the Chief Human Resources Officer, and the directors, officers and employees of the Employers and each of
them, from the effects and consequences of their acts, omissions and conduct in their official capacity with respect to the Plan (including but not 

  
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limited to judgments, attorney fees and costs with respect to any and all related claims, subject to the Company’s notice of and right to direct any litigation, select any counsel or
advisor, and approve any settlement), except to the extent that such effects and consequences result from their own willful misconduct. The foregoing indemnification shall be in addition to (and secondary to) such other rights such persons may enjoy
as a matter of law or by reason of insurance coverage of any kind. 
 (j) No Compensation. None of the Administrator, any person
employed in the Exelon Investment Office nor any member of the Corporate Investment Committee may receive any compensation or fee from the Plan for services as the Administrator, the Investment Office or a member of the Corporate Investment
Committee; provided, however that nothing contained herein shall preclude the Plan from reimbursing the Company or any Employer for compensation paid to any such person if such compensation constitutes “direct expenses” for purposes of
ERISA. The Employers shall reimburse the Administrator, the persons employed in the Exelon Investment Office and the members of the Corporate Investment Committee for any reasonable expenditures incurred in the discharge of their duties hereunder.

 (k) Employ of Counsel and Agents. The Administrator, the Investment Office and the Corporate Investment Committee may employ such
counsel (who may be counsel for an Employer) and agents and may arrange for such clerical and other services as each may require in carrying out its respective duties under the Plan. 

Section 11.2. Claims Procedure. 

Any Participant or distributee who believes he or she is entitled to benefits in an amount greater than those which he or she is receiving or
has received may file a claim with the Administrator. Such a claim shall be in writing and state the nature of the claim, the facts supporting the claim, the amount claimed, and the address of the claimant. The Administrator

  
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shall review the claim and, unless special circumstances require an extension of time, within 90 days after receipt of the claim, give notice to the claimant, either in writing by registered or
certified mail or in an electronic notification, of the Administrator’s decision with respect to the claim. Any electronic notice delivered to the claimant shall comply with the standards imposed by applicable Regulations. If the Administrator
determines that special circumstances require an extension of time for processing the claim, the claimant shall be so advised in writing within the initial 90-day period and in no event shall such an extension exceed 90 days. The extension notice
shall indicate the special circumstances requiring an extension of time and the date by which the Administrator expects to render the benefit determination. The notice of the decision of the Administrator with respect to the claim shall be written
in a manner calculated to be understood by the claimant and, if the claim is wholly or partially denied, the Administrator shall notify the claimant of the adverse benefit determination and shall set forth the specific reasons for the adverse
determination, the references to the specific Plan provisions on which the determination is based, a description of any additional material or information necessary for the claimant to perfect the claim, an explanation of why such material or
information is necessary, and a description of the claim review procedure under the Plan and the time limits applicable to such procedures, including a statement of the claimant’s right (subject to the limitations described in Sections 13.11
and 13.12) to bring a civil action under Section 502 of ERISA following an adverse benefit determination on review. The Administrator shall also advise the claimant that the claimant or the claimant’s duly authorized representative may
request a review by the by the Vice President, Health & Benefits (or such other officer designated from time to time by the Chief Human Resources Officer) of the adverse benefit determination by filing with such officer, within 60 days
after receipt of a notification of an adverse benefit determination, a written request for such review. The claimant shall be informed that, within the same 60-day period, he or she (a) may be 

  
 73 

 
provided, upon request and free of charge, reasonable access to, and copies of, all documents, records and other information relevant to the claimant’s claim for benefits and (b) may
submit to such officer written comments, documents, records and other information relating to the claim for benefits. If a request is so filed, review of the adverse benefit determination shall be made by such officer within, unless special
circumstances require an extension of time, 60 days after receipt of such request, and the claimant shall be given written notice of the officer’s final decision. If the reviewing officer determines that special circumstances require an
extension of time for processing the claim, the claimant shall be so advised in writing within the initial 60-day period and in no event shall such an extension exceed 60 days. The extension notice shall indicate the special circumstances requiring
an extension of time and the date by which the officer expects to render the determination on review. The review of the officer shall take into account all comments, documents, records and other information submitted by the claimant relating to the
claim, without regard to whether such information was submitted or considered in the initial benefit determination. The notice of the final decision shall include specific reasons for the determination and references to the specific Plan provisions
on which the determination is based and shall be written in a manner calculated to be understood by the claimant. 

Section 11.3. Procedures for Domestic Relations Orders. 

If the Administrator receives any written judgment, decree or order (including approval of a property settlement agreement) pursuant to
domestic relations or community property laws of any state relating to the provision of child support, alimony or marital property rights of a Spouse, former Spouse, child or other dependent of a Participant and purporting to provide for the payment
of all or a portion of the Participant’s benefit under the Plan to or on behalf of one or more of such persons (such judgment, decree or order being hereinafter called a “domestic relations order”), the Administrator shall promptly
notify the Participant and each other payee specified in such 

  
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domestic relations order of its receipt and of the following procedures. After receipt of a domestic relations order, the Administrator shall determine whether such order constitutes a
“qualified domestic relations order,” as defined in paragraph (b) Section 14.2 (relating to exception for qualified domestic relations orders), and shall notify the Participant and each payee named in such order in writing of its
determination. Such notice shall be written in a manner calculated to be understood by the parties and shall set forth specific reasons for the Administrator’s determination, and shall contain an explanation of the review procedure under the
Plan. The Administrator shall also advise each party that the party or his or her duly authorized representative may request a review by the Vice President, Health & Benefits (or such other officer designated from time to time by the Chief
Human Resources Officer) of the Administrator’s determination by filing a written request for such review. The Administrator shall give each party affected by such request notice of such request for review. Each party also shall be informed
that he or she may have reasonable access to pertinent documents and submit comments in writing to such officer in connection with such request for review. Each party shall be given written notice of the officer’s final determination, which
notice shall be written in a manner calculated to be understood by the parties and shall include specific reasons for such final determination. Any amounts subject to a domestic relations order which would be payable to the alternate payee prior to
the determination that such order is a qualified domestic relations order shall be separately accounted for and not distributed prior to such determination. If within a reasonable time after receipt of written evidence of such order it is determined
that such domestic order constitutes a qualified domestic relations order, the amounts so separately accounted for (plus any interest thereon) shall be paid to the alternate payee. If within such reasonable period of time it is determined that such
order does not constitute a qualified domestic relations order, the amounts so separately accounted for (plus any interest thereon) shall be paid to such other persons, 

  
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if any, entitled to such amounts at such time. Prior to the issuance of regulations, the Administrator shall establish the time periods in which the Administrator’s determination, a request
for review thereof and the review by the Administrator shall be made, provided that the total of such time periods shall not be longer than 18 months from the date written evidence of a domestic relations order is received by the Administrator. 

The duties of the Administrator under this Section 11.3 may be delegated by the Administrator to one or more persons other than the
Administrator. 
 Section 11.4. Notices to Participants, Etc. 

All notices, reports and statements given, made, delivered or transmitted to a Participant or distributee or any other person entitled to or
claiming benefits under the Plan shall be deemed to have been duly given, made or transmitted when mailed by first class mail with postage prepaid and addressed to the Participant or distributee or such other person at the address last appearing on
the records of the Administrator. A Participant or distributee or other person may record any change of his or her address from time to time by written notice filed with the Administrator. 

Section 11.5. Notices to Administrator. 

Written directions, notices and other communications from Participants or distributees or any other person entitled to or claiming benefits
under the Plan to the Administrator shall be deemed to have been duly given, made or transmitted either when delivered to such location as shall be specified upon the forms prescribed by the Administrator for the giving of such directions, notices
and other communications or when mailed by first class mail with postage prepaid and addressed to the addressee at the address specified upon such forms. 

Section 11.6. Records. 

Each of the Administrator and the Investment Office shall keep a record of all of their respective proceedings, if any, and shall keep or
cause to be kept all books of account, records and other data as may be necessary or advisable in their respective judgment for the administration of the Plan or the administration of the investments of the Plan. 

  
 76 

 Section 11.7. Reports of Trustee and Accounting to Participants. 

The Administrator shall keep on file, in such form as it shall deem convenient and proper, all reports concerning the Trust Fund received by
it from the Trustee, and the Administrator will, as soon as practicable after the last day of each quarter of each Plan Year furnish each Participant and Beneficiary with a statement reflecting the condition of his or her accounts as of that date.

 Section 11.8. Electronic Media. 

Notwithstanding any provision of the Plan to the contrary and for all purposes of the Plan, to the extent permitted by the Administrator and
any applicable law or Regulation, the use of electronic technologies shall be deemed to satisfy any written notice, consent, delivery, signature, disclosure or recordkeeping requirement under the Plan, the Code or ERISA to the extent permitted by or
consistent with applicable law and Regulations. Any transmittal by electronic technology shall be deemed delivered when successfully sent to the recipient, or such other time specified by the Administrator. 

ARTICLE 12 

PARTICIPATION BY OTHER EMPLOYERS 

Section 12.1. Adoption of Plan. 

With the consent of the Company, any entity may become a participating Employer under the Plan by (a) taking such action as shall be
necessary to adopt the Plan and (b) executing and delivering such instruments and taking such other action as may be necessary or desirable to put the Plan into effect with respect to such entity. 

  
 77 

 Section 12.2. Withdrawal from Participation. 

Any Employer shall terminate its participation in the Plan at any time, under such circumstances as the Company may provide, by delivering to
the Company a duly certified copy of a resolution of its board of directors (or other governing body) to that effect, or by ceasing to be a member of the same controlled group as the Company (within the meaning of section 1563(a) of the Code). 

Section 12.3. Company as Agent for Employers. 

Each entity that becomes a participating Employer pursuant to Section 12.1 (relating to adoption of Plan) or Article 13 (relating to
continuance by a successor) by so doing shall be deemed to have appointed the Company its agent to exercise on its behalf all of the powers and authorities hereby conferred upon the Company by the terms of the Plan, including, but not by way of
limitation, the power to amend and terminate the Plan. The authority of the Company to act as such agent shall continue unless and until the portion of the Trust Fund held for the benefit of Employees of the particular Employer and their
Beneficiaries is set aside in a separate Trust Fund as provided in Section 16.2 (relating to establishment of separate trust). 

ARTICLE 13 

CONTINUANCE BY A SUCCESSOR 

In the event that the Employer is reorganized by way of merger, consolidation, transfer of assets or otherwise, so that another entity
succeeds to all or substantially all of the Employer’s business, such successor entity may be substituted for the Employer under the Plan by adopting the Plan and becoming a party to the Trust agreement. Contributions by the Employer shall be
automatically suspended from the effective date of any such reorganization until the date upon which the substitution of such successor entity for the Employer under the Plan becomes effective. 

  
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If, within 90 days following the effective date of any such reorganization, such successor entity shall not have elected to become a party to the Plan, or if the Employer adopts a plan of
complete liquidation other than in connection with a reorganization, the Plan shall be automatically terminated with respect to Employees of such Employer as of the close of business on the 90th day following the effective date of such
reorganization or as of the close of business on the date of adoption of such plan of complete liquidation, as the case may be, and the Administrator shall direct the Trustee to distribute the portion of the Trust Fund applicable to such Employer in
the manner provided in Article 16 (relating to establishment of separate plan and termination). 
 If such successor entity is substituted
for an Employer by electing to become a party to the Plan as described above, then, for all purposes of the Plan, employment of such Employee with such Employer, including service with and compensation paid by such Employer, shall be considered to
be employment with an Employer. 
 ARTICLE 14 

MISCELLANEOUS 

Section 14.1. Expenses. 

Except as provided in the last sentence of Section 6.2 (relating to expenses of investments for an investment fund), all costs and
expenses incurred in administering the Plan and the Trust, including, but not limited to, “direct expenses” incurred in administering the Plan and the Trust (including compensation paid to any employee of an Employer or an Affiliate who is
engaged in the administration of the Plan or the Trust), the expenses of the Administrator and the Investment Office, the fees of counsel and any agents for the Administrator and the Investment Office, the fees and expenses of the Trustee, the fees
of counsel for the Trustee and other administrative expenses shall, to the extent permitted by law, be paid from the Trust Fund to the extent such 

  
 79 

 
expenses are not paid by the Employers. Notwithstanding the foregoing, the Administrator may authorize an Employer to pay any expenses, and the Employer shall be reimbursed from the Trust Fund
for such payments. The Administrator, in its discretion, having regard to the nature of a particular expense, shall determine the portion of the expense that is to be borne by each Employer. 

Section 14.2. Non-Assignability. 

(a) In general. It is a condition of the Plan, and all rights of each Participant and Beneficiary shall be subject thereto, that no
right or interest of any Participant or Beneficiary in the Plan shall be assignable or transferable in whole or in part, either directly or by operation of law or otherwise, including, but not by way of limitation, execution, levy, garnishment,
attachment, pledge or bankruptcy, but excluding devolution by death or mental incompetency, and no right or interest of any Participant or Beneficiary in the Plan shall be liable for, or subject to, any obligation or liability of such Participant or
Beneficiary, including claims for alimony or the support of any Spouse, except as provided below. 
 (b) Exception for Qualified Domestic
Relations Orders. Notwithstanding any provision of the Plan to the contrary, if a Participant’s account balance under the Plan, or any portion thereof, is the subject of one or more qualified domestic relations orders, as defined below,
such account balance or portion thereof shall be paid to the person and at the time and in the manner specified in any such order. For purposes of this paragraph (b), “qualified domestic relations order” shall mean any “domestic
relations order” as defined in Section 11.3 (relating to procedures for domestic relations orders) that creates (or recognizes the existence of) or assigns to a person other than the Participant (an “alternate payee”) rights to
all or a portion of the Participant’s account balance under the Plan, and: 
 (A) clearly specifies 

 

	 	(i)	the name and last known mailing address (if any) of the Participant and each alternate payee covered by such order, 

  
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	 	(ii)	the amount or percentage of this Participant’s benefits to be paid by the Plan to each such alternate payee, or the manner in which such amount or percentage is to be determined, 

 

	 	(iii)	the number of payments to, or period of time for which, such order applies, and 

  

	 	(iv)	each plan to which such order applies; 

 (B) does not require 

 

	 	(i)	the Plan to provide any type or form of benefit or any option not otherwise provided under the Plan at the time such order is issued, 

 

	 	(ii)	the Plan to provide increased benefits (determined on the basis of actuarial equivalence), and 

  

	 	(iii)	the payment of benefits to an alternate payee that at the time such order is issued already are required to be paid to a different alternate payee under a prior qualified domestic relations order; and 

(C) does not require the commencement of payment of benefits to any alternate payee before the earlier of (I) the date on
which the Participant is entitled to a distribution under the Plan and (II) the date the Participant attains age 50, except that the order may require the commencement of payment of benefits as soon as administratively practicable after the date
such order is determined by the Administrator to be a “qualified domestic relations order”; 
 all as determined by the Administrator pursuant to
the procedures contained in Section 11.3 (relating to procedures for domestic relations orders). Any amounts subject to a domestic relations order prior to determination of its status as a qualified domestic relations order that but for such
order would be paid to the Participant shall be segregated in a separate account or an escrow account pending such determination. If within the reasonable time period beginning with the date on which the first payment would be required to be made
under a domestic relations order the Administrator determines that the domestic relations order constitutes a qualified domestic relations order, the amount so segregated (plus any interest thereof) shall be paid to the alternate payee. If such
determination is not made within such reasonable time period, then the amount so 

  
 81 

 
segregated (plus any interest thereon), shall, as soon as practicable after the end of such reasonable time period, be paid to the Participant. Any determination regarding the status of such
order after such reasonable time period shall be applied only to payments on or after the date of such determination. 

Section 14.3. Employment Non-Contractual. 

The Plan confers no right upon an Employee to continue in employment. 

Section 14.4. Limitation of Rights. 

A Participant or distributee shall have no right, title or claim in or to any specific asset of the Trust Fund, but shall have the right only
to distributions from the Trust Fund on the terms and conditions herein provided. 
 Section 14.5. Merger or Consolidation
with Another Plan. 
 A merger or consolidation with, or transfer of assets or liabilities to, any other plan shall not be effected
unless the terms of such merger, consolidation or transfer are such that each Participant, distributee, Beneficiary or other person entitled to receive benefits from the Plan would, if the Plan were to terminate immediately after the merger,
consolidation or transfer, receive a benefit equal to or greater than the benefit such person would be entitled to receive if the Plan were to terminate immediately before the merger, consolidation, or transfer. 

Section 14.6. Gender and Plurals. 

Wherever used in the Plan, words in the masculine gender shall include masculine or feminine gender, and, unless the context otherwise
requires, words in the singular shall include the plural, and words in the plural shall include the singular. 

  
 82 

 Section 14.7. Applicable Law. 

Except to the extent preempted by applicable federal law or otherwise provided under the terms of the Plan, the Plan and all rights hereunder
shall be governed by and construed in accordance with the laws of the State of Illinois. 
 Section 14.8. Severability.

 If a provision of the Plan shall be held illegal or invalid, the illegality or invalidity shall not affect the remaining parts of the
Plan and the Plan shall be construed and enforced as if the illegal or invalid provision had not been included in the Plan. 

Section 14.9. No Guarantee. 

Neither the Administrator or the Investment Office, the Employer, nor the Trustee in any way guarantees the Trust from loss or depreciation
nor the payment of any money that may be or become due to any person from the Trust Fund. Nothing herein contained shall be deemed to give any Participant, distributee, or Beneficiary an interest in any specific part of the Trust Fund or any other
interest except the right to receive benefits out of the Trust Fund in accordance with the provisions of the Plan and the Trust Fund. 

Section 14.10. Statute of Limitations for Actions under the Plan. 

Except for actions to which the statute of limitations prescribed by Section 413 of ERISA applies, (a) no legal or equitable action
relating to a claim for benefits under Section 502 of ERISA may be commenced later than one year after the claimant receives a final decision from the Company’s Vice President, Health & Benefits (or such other officer designated
from time to time by the Chief Human Resources Officer) in response to the claimant’s request for review of the adverse benefit determination and (b) no other legal or equitable action involving the Plan may be commenced later than two
years from the time the person bringing an action knew, or had reason to know, of the circumstances giving rise to the action. This provision shall not be interpreted to extend any otherwise applicable statute of limitations, nor to bar the Plan or
its fiduciaries from recovering overpayments of benefits or other amounts incorrectly paid to any person under the Plan at any time or bringing any legal or equitable action against any party. 

  
 83 

 Section 14.11. Forum for Legal Actions under the Plan. 

Any legal action involving the Plan that is brought by any Participant, any Beneficiary or any other person shall be litigated in the federal
courts located in the Northern District of Illinois or the Eastern District of Pennsylvania, whichever is most convenient, and no other federal or state court. 

Section 14.12. Legal Fees. 

Any award of legal fees in connection with an action involving the Plan shall be calculated pursuant to a method that results in the lowest
amount of fees being paid, which amount shall be no more than the amount that is reasonable. In no event shall legal fees be awarded for work related to (a) administrative proceedings under the Plan, (b) unsuccessful claims brought by a
Participant, Beneficiary or any other person, or (c) actions that are not brought under ERISA. In calculating any award of legal fees, there shall be no enhancement for the risk of contingency, nonpayment or any other risk nor shall there be
applied a contingency multiplier or any other multiplier. In any action brought by a Participant, Beneficiary or any other person against the Plan, the Administrator, the Investment Office, the Vice President, Health & Benefits, any Plan
fiduciary, the Chief Human Resources Officer, the Company, its affiliates or their respective officers, directors, employees, or agents (the “Plan Parties”), legal fees of the Plan Parties in connection with such action shall be paid by
the Participant, Beneficiary or other person bringing the action, unless the court specifically finds that there was a reasonable basis for the action. 

  
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 ARTICLE 15 

TOP-HEAVY PLAN REQUIREMENTS 

Section 15.1. Top-Heavy Plan Determination. 

If as of the determination date (as defined in Section 15.2) for any Plan Year (a) the sum of the account balances under the Plan
and all other defined contribution plans in the aggregation group (as defined in Section 15.2) and (b) the present value of accrued benefits under all defined benefit plans in such aggregation group of all Participants in such plans who
are key employees (as defined in Section 15.2) for such Plan Year exceeds 60 percent of the aggregate of the account balances and present value of accrued benefits of all participants in such plans as of the determination date (as defined in
Section 15.2), then this Plan shall be a top-heavy plan for such Plan Year, and the requirements of Sections 15.3 (relating to minimum contribution for top-heavy years) shall be applicable for such Plan
Year as of the first day thereof. If the Plan shall be a top-heavy plan for any Plan Year and not be a top-heavy plan for any subsequent Plan Year, the requirements of
this Article shall not be applicable for such subsequent Plan Year. 
 Section 15.2. Definitions and Special Rules. 

(a) Definitions. For purposes of this Article, the following definitions shall apply: 

 

	 	(1)	Determination Date. The determination date for all plans in the aggregation group shall be the last day of the preceding Plan Year, and the valuation date applicable to a determination date shall be (i) in
the case of a defined contribution plan, the date as of which account balances are determined which is coincident with or immediately precedes the determination date, and (ii) in the case of a defined benefit plan, the date as of which the most
recent actuarial valuation for the Plan Year that includes the determination date is prepared, except that if any such plan specifies a different determination or valuation date, such different date shall be used with respect to such plan.

  

	 	(2)	Aggregation Group. The aggregation group shall consist of (a) each plan of an Employer in which a key Employee is a participant, (b) each other plan that enables such a plan to be qualified under
section 401(a) of the Code, and (c) any other plans of an Employer that the Company designates as part of the aggregation group and that shall permit the aggregation group to continue to meet the requirements of sections 401(a) and 410 of the
Code with such other plan being taken into account. 

  
 85 

	 	(3)	Key Employee. Key Employee shall have the meaning set forth in section 416(i) of the Code. 

  

	 	(4)	Compensation. Compensation shall have the meaning set forth in section 1.415(c)-2 of the Regulations. 

(b) Special Rules. For the purpose of determining the accrued benefit or account balance of a Participant, the accrued benefit or
account balance of any person who has not performed services for an employer at any time during the 1-year period ending on the determination date shall not be taken into account pursuant to this Section. Any
person who received a distribution from a plan (including a plan that has terminated) in the aggregation group during the 1-year period ending on the last day of the preceding Plan Year shall be treated as a
Participant in such plan, and any such distribution shall be included in such Participant’s account balance or accrued benefit, except that in the case of any distribution made for a reason other than separation from service, death or
disability, this sentence shall be applied by substituting “5-year period” for the “1-year period” stated herein. 

Section 15.3. Minimum Contribution for Top-Heavy Years. 

Notwithstanding any provision of the Plan to the contrary, the sum of the Employer contributions under Article 4 (other than Before-Tax
Contributions described in Section 4.1) allocated to the account of each Participant (other than a key Employee) during any Plan Year and the forfeitures allocated to the account of such Participant (other than a key Employee) during any Plan
Year for which the Plan is a top-heavy plan shall in no event be less than the lesser of (i) 3% of such Participant’s compensation during such Plan Year and (ii) the highest percentage at which
contributions are made on behalf of any key Employee for such Plan Year. Notwithstanding the preceding sentence, if the percentage determined pursuant to clause (ii) of the preceding sentence is less than 3%, such percentage shall be
recalculated by including Before-Tax Contributions made 

  
 86 

 
on behalf of key employees. Such minimum contribution shall be made even if, under other provisions of the Plan, the Participant would not otherwise be entitled to receive an allocation or would
receive a lesser allocation for the year because of (i) the Participant’s failure to complete 1,000 Hours of Service, or (ii) compensation of less than a stated amount. If, during any Plan Year for which this Section 15.3 is
applicable, a defined benefit plan is included in the aggregation group and such defined benefit plan is a top-heavy plan for such Plan Year, the percentage set forth in clause (i) of the first sentence of this Section shall be 5%. The
percentage referred to in clause (ii) of the first sentence of this Section shall be obtained by dividing the aggregate of contributions made pursuant to Article 4 and pursuant to any other defined contribution plan that is required to be
included in the aggregation group (other than a defined contribution plan that enables a defined benefit plan that is required to be included in such group to be qualified under section 401(a) of the Code) during the Plan Year on behalf of such key
Employee by such key Employee’s compensation for the Plan Year. Notwithstanding the above, the provisions of this Section 15.3 shall not apply for any Plan Year with respect to an Eligible Employee who has accrued the defined benefit
minimum provided under section 416 of the Code under a qualified defined benefit plan maintained by an Employer or Affiliate. 
 ARTICLE
16  
 AMENDMENT, ESTABLISHMENT OF SEPARATE PLAN AND TERMINATION 

Section 16.1. Amendment. 

The Company may at any time and from time to time amend or modify the Plan by resolution of the Board of Directors of the Company or the
Compensation Committee thereof; provided, however, that in the case of any amendment or modification that would not result in an aggregate annual cost to the Company of more than $50,000,000, the Plan may be amended or

  
 87 

 
modified by action of the Chief Human Resources Officer (with the consent of the Chief Executive Officer in the case of a discretionary amendment or modification expected to result in an increase
in annual expense or liability exceeding $250,000) or another executive officer holding title of equivalent or greater responsibility. No amendment shall be made in respect of Eligible Employees who are members of a bargaining unit represented by
IBEW Local Union 15 that is inconsistent with that portion of the collective bargaining agreement between such an Employer and IBEW Local Union 15 concerning the Plan. 

Section 16.2. Establishment of Separate Plan. 

If an Employer withdraws from the Plan under Section 12.2 (relating to withdrawal from participation), the Administrator may determine
the portion of the Trust Fund held by the Trustee that is applicable to the Participants and former Participants of such Employer and direct the Trustee to segregate such portion in a separate Trust Fund. Such separate Trust Fund shall thereafter be
held and administered as a part of the separate plan of such Employer. 
 The portion of the Trust Fund applicable to the Participants and
former Participants of a particular Employer shall be the sum of: 
  

	 	(a)	the total amount credited to all accounts that are applicable to the Participants and former Participants of such Employer and 

  

	 	(b)	an amount that bears the same ratio to the excess, if any, of 

  

	 	(i)	the total value of the Trust Fund over 

  

	 	(ii)	the total amount credited to all accounts 

 as the total amount credited to the accounts that are applicable to
the Participants of such Employer bears to the total amount credited to such accounts of all Participants. 

  
 88 

 Section 16.3. Termination and Distributions upon Termination of the Plan. 

The Company has established the Plan with the bona fide intention and expectation that contributions will be continued indefinitely, but the
Company will not have any obligation or liability whatsoever to maintain the Plan for any given length of time and may terminate the Plan at any time by resolution of the Board of Directors or the Compensation Committee thereof, to that effect,
without any liability whatsoever for any such termination. Notwithstanding the preceding sentence, the Plan shall not be terminated in respect of Eligible Employees who are members of a bargaining unit represented by IBEW Local Union 15 if such
termination is inconsistent with the portion of the collective bargaining agreement between the Employer of such Eligible Employees and IBEW Local Union 15 concerning the Plan. The Plan will be deemed terminated: (a) if and when the Company is
judicially declared bankrupt, or (b) upon dissolution of the Company. 
 Upon termination of the Plan by the Company or withdrawal from
participation in the Plan by any Employer pursuant to Section 12.2 (relating to withdrawal from participation) or the partial termination of the Plan with respect to a group of Employees or complete discontinuance of contributions hereunder,
distributions shall be made to each affected Participant or other persons entitled to distributions pursuant to Article 8 (relating to withdrawals and distributions). If the entire Plan is terminating, upon the completion of distribution to all
Participants, the Trust will terminate, the Trustee will be relieved from all liability under the Trust, and no Participant or other person will have any claims thereunder, except as required by applicable law. 

Notwithstanding the preceding paragraph, no distribution shall be made to any Participant (i) until he or she attains age 59 1⁄2 except as otherwise provided in Section 8.3 (relating to distributions upon termination of employment) or (ii) if a successor plan, as defined in
Regulations, is established or maintained by the Participant’s Employer. 

  
 89 

 To the extent that no discrimination in value results, any distribution after termination or
partial termination of the Plan may be made, in whole or in part, in cash, in securities or other assets in kind, or in non-transferable annuity contracts, as the Administrator (in its discretion) may determine. All non-cash distributions shall be
valued at fair market value at date of distribution. 
 If the Internal Revenue Service refuses to issue an initial, favorable determination
letter that the Plan and Trust Fund as adopted by an Employer meet the requirements of section 401(a) of the Code and that the Trust Fund is exempt from tax under section 501(a) of the Code, the Employer may terminate its participation in the Plan
and shall direct the Trustee to pay and deliver the portion of the Trust Fund applicable to the Participants of such Employer, determined pursuant to Section 16.2 (relating to establishment of separate plan) to such Employer and such Employer
shall pay to Participants or their beneficiaries the part of such Employer’s portion of the Trust Fund as is attributable to contributions made by Participants. 

Notwithstanding any provision of this Plan to the contrary, no distribution shall be made pursuant to this Section 16.3 (relating to
termination and distribution upon termination of the Plan) solely due to the termination of this Plan if, within the meaning of applicable Regulations, the employer establishes or maintains an alternative defined contribution plan. 

Section 16.4. Trust Fund to Be Applied Exclusively for Participants and Their Beneficiaries. 

Subject only to the provisions of Section 4.5 (relating to the limitation on Employer contributions), 7.4 (relating to limitations on
allocations imposed by section 415 of the Code) and 16.3 (relating to termination and distributions upon termination of the Plan), and any other provision of the Plan to the contrary notwithstanding, it shall be impossible for any part of the Trust
Fund to be used for or diverted to any purpose not for the exclusive benefit of Participants and their Beneficiaries either by operation or termination of the Plan, power of amendment or other means. 

  
 90 

 IN WITNESS WHEREOF, the Company has caused this instrument to be executed by its duly authorized
officer on this              day of December, 2012. 
  

			
	EXELON CORPORATION
		
	By 	 	 
		 	Chief Human Resources Officer

  
 91 

 SUPPLEMENT I 

Transfers from Other Plans 
 With
the consent of the Administrator, whenever a participant in any other qualified savings or profit sharing plan maintained for employees of an entity any of whose assets or stock are acquired by an Employer (the “Other Plan”) becomes a
Participant in this Plan, then such Participant’s interest in the Other Plan may be transferred to the Trustee of this Plan and credited to administrative subaccounts to be held, invested, reinvested and distributed pursuant to the terms of the
Plan and the Trust and, as of the date of the transfer of any such Participant’s interest in the Other Plan, 
  

	 	(a)	there shall be credited to the Before-Tax Contributions Account of such Participant that portion of his interest in the Other Plan which is transferred to the Trustee and which represents the Participant’s salary
reduction contributions, if any, made to the Other Plan on behalf of the Participant, 

  

	 	(b)	there shall be credited to the After-Tax Account of such Participant that portion of his interest in the Other Plan which is transferred to the Trustee and which represents the Participant’s after-tax
contributions, if any, made to the Other Plan, 

  

	 	(c)	there shall be credited to the Employer Matching Contributions Account of such Participant that portion of his interest in the Other Plan which is transferred to the Trustee and which represents the matching
contributions and other employer contributions, if any, made to the Other Plan on behalf of the Participant, and 

  

	 	(d)	there shall be credited to the Rollover Account of such Participant that portion of his interest in the Other Plan which is transferred to the Trustee and which represents the Participant’s rollover contributions,
if any, to the Other Plan. 

  
 I-1 

 Any amounts credited to a Participant’s Before-Tax Contributions Account, After-Tax
Contributions Account, Employer Matching Contributions Account and Rollover Account shall be credited to the administrative subaccounts in accordance with such Participant’s investment direction in effect as of the date of such transfer. Any
salary reduction contributions credited to the Before-Tax Contributions Account that are designated Roth contributions within the meaning of section 402A of the Code shall be maintained in a manner that satisfies the separate accounting requirement,
and any Regulations or other requirements promulgated, under section 402A of the Code. Any special provisions applicable to amounts transferred to the Trustee from any Other Plan shall be set forth in an Exhibit hereto. 

  
 I-2 

 SUPPLEMENT II 

Elective Transfers Between This Plan and Plans of Affiliates or the TXU 401(k) Plan 

A. Transfers to this Plan. Whenever an individual who is employed by an Affiliate that is not an Employer has a change in employment
status that results in such individual (a) becoming an Eligible Employee and (b) being ineligible to make additional elective contributions under a plan maintained by such Affiliate (an “Affiliate Plan”), such Eligible Employee
may elect to transfer his or her benefits under the Affiliate Plan to this Plan. Such election must be conditioned upon a voluntary, fully-informed election by the Eligible Employee. In the event that the Eligible Employee makes such election, his
or her benefits under the Affiliate Plan shall be credited to his account under this Plan, and such benefits shall be subject to the terms of, and paid as prescribed by, this Plan, and the terms of the Affiliate Plan shall not apply with respect to
such benefits. 
 An individual who becomes an Eligible Employee in connection with the Company’s 2002 acquisition of from Texas
Utilities, Inc. (“TXU”) may elect to transfer his or her benefits under TXU’s 401(k) plan (the “TXU Plan”) to this Plan. Such election must be conditioned upon a voluntary, fully-informed election by the Eligible Employee.
In the event that the Eligible Employee makes such election, his or her benefits under the TXU Plan shall be credited to his account under this Plan, and such benefits shall be subject to the terms of, and paid as prescribed by, this Plan, and the
terms of the TXU Plan shall not apply with respect to such benefits. 

  
 II-1 

 B. Transfers from this Plan. Whenever a Participant has a change in employment status that
results in such Participant (a) ceasing to be an Eligible Employee and (b) becoming eligible to participate in an Affiliate Plan, such Participant may elect to transfer his or her benefits under this Plan to the Affiliate Plan. Such
election must be conditioned upon a voluntary, fully-informed election by the Participant. In the event that the Participant makes such election, the Participant, effective at the time of the transfer, shall not be entitled to any benefits under
this Plan and the benefits transferred to the Affiliate Plan shall be subject to the terms of, and paid as prescribed by, the Affiliate Plan, and the terms of this Plan shall not apply with respect to such benefits. 

  
 II-2 

 SUPPLEMENT III 

Merger of Certain AmerGen Plans into this Plan 

Purpose. The purpose of this Supplement III is to reflect the merger of the AmerGen Clinton Employee Savings Plan for Nonbargaining
Employees (the “Clinton Plan”) and the AmerGen TMI and Oyster Creek Employee Savings Plan for Nonbargaining Employees (collectively, the “AmerGen Plans”) into the Plan effective February 1, 2004 (the “Merger Date”)
and to preserve those provisions of the AmerGenPlans that cannot be eliminated by amendment without violating section 411(d)(6) of the Internal Revenue Code and applicable Treasury regulations thereunder. 

Definitions. Unless the context clearly indicates otherwise, a term defined in the Plan shall have the same meanings for purposes of
this Supplement III. 
 Conflicts Between the Plan and this Supplement III. This Supplement III and the Plan together comprise the
Plan with respect to AmerGen Plan Participants (as defined below). In case of any conflict between the provisions of the Plan and this Supplement III, the terms and provisions of this Supplement III shall govern to the extent necessary to eliminate
such conflict. 
 AmerGen Plan Participants. This Supplement III shall be applicable to all AmerGen Plan Participants. “AmerGen
Plan Participants” are participants in the Plan who were participants in the AmerGen Plans and whose account balances under the AmerGen Plans were merged into the Plan. 

Vesting. All AmerGen Plan Participants shall be fully vested in their accounts under the Plan. 

Withdrawals of Employer Matching Contributions. Notwithstanding any provision in the Plan to the contrary, an AmerGen Plan Participant
who, immediately prior to the Merger Date was a participant in the Clinton Plan (“Clinton Participant”) who has completed 60 months as either a participant in the Clinton Plan or a participant in this Plan may elect, in accordance with

  
 III-1 

 
procedures established by the Administrator, to receive a distribution of all or any part of his or her Employer Matching Contributions Account that is attributable to contributions made under
the Clinton Plan, as adjusted for gains, earnings and losses attributable thereto determined as of the Valuation Date next succeeding the date of receipt of the request for distribution. Additionally, a Clinton Participant, regardless of his or her
period of participation in the Clinton Plan or this Plan, may elect, in accordance with procedures established by the Administrator, to receive a distribution of all or any part of that portion of the Employer Matching Contributions Account that is
attributable to contributions made under the Clinton Plan and that is derived from Employer Matching Contributions in excess of Employer Matching Contributions allocated to his or her Employer Matching Contributions Account during the two Plan Years
preceding the Plan Year in which the withdrawal takes place, adjusted for gains, earnings and losses attributable thereto determined as of the Valuation Date next succeeding the date of receipt of the request for distribution. 

No distribution made pursuant to this paragraph F may be for an amount which is less than the lesser of (i) $200; or (ii) that
portion of the Participant’s Employer Matching Contributions Account that is attributable to contributions made under the Clinton Plan, as adjusted for gains, earnings and losses attributable thereto. In addition, a Participant may not make
more than one withdrawal pursuant to this paragraph F in any Plan Year. 
 Loans. With respect to any loan to an AmerGen Plan
Participant that is outstanding at the Merger Date, the terms of such loan shall continue to be governed by the note evidencing such loan and the terms applicable to such loan as in effect under the AmerGen Plans as of the Merger Date. All loans
made after the Merger Date shall be governed by and in accordance with the terms of the Plan and any loan policy issued thereunder by the Administrator. 

  
 III-2 

 SUPPLEMENT IV 

Merger of New England Plan into this Plan 

Purpose. The purpose of this Supplement IV is to reflect the merger of the Exelon New England Union Retirement 401(k) Plan ( the
“New England Plan”) into the Plan effective November 1, 2004 (the “Merger Date”). 
 Definitions. Unless the
context clearly indicates otherwise, a term defined in the Plan shall have the same meanings for purposes of this Supplement IV. 

Conflicts Between the Plan and this Supplement IV. This Supplement IV and the Plan together comprise the Plan with respect to New
England Plan Participants (as defined below). In case of any conflict between the provisions of the Plan and this Supplement IV, the terms and provisions of this Supplement IV shall govern to the extent necessary to eliminate such conflict. 

New England Plan Participants. This Supplement IV shall be applicable to all New England Plan Participants. “New England Plan
Participants” are participants in the Plan who were participants in the New England Plan and whose account balances under the New England Plan were merged into the Plan. 

Vesting. All New England Plan Participants shall be fully vested in their accounts under the Plan. 

Loans. With respect to any loan to a New England Plan Participant that is outstanding at the Merger Date, the terms of such loan shall
continue to be governed by the note evidencing such loan and the terms applicable to such as in effect under the New England Plan as of the Merger Date. All loans made after the Merger Date shall be governed by and in accordance with the terms of
the Plan and any loan policy issued thereunder by the Administrator. 

  
 IV-1 

 SUPPLEMENT V  

Transfers from the Exelon Corporation 401(k) Profit Sharing Plan No. 2 

A. Purpose. The purpose of this Supplement IV is to reflect the transfer to the Plan of assets allocated to certain accounts under the
Exelon Corporation 401(k) Profit Sharing Plan No. 2 (the “InfraSource Plan No. 2”), which was terminated on November 30, 2007. 

B. Definitions. All capitalized terms used in this Supplement IV, but not separately defined herein, shall have the same meanings
assigned to such terms in the Plan. 
 C. Applicability. This Supplement shall apply to any individual (“Affected
Participant”) whose benefit under the InfraSource Plan No. 2 is transferred pursuant to Section D of this Supplement IV. An Affected Participant shall be treated as a Participant under the Plan for all purposes of the Plan except, unless
the Affected Participant is otherwise eligible to participate in the Plan, for purposes related to making or receiving contributions as set forth in Articles 4 and 5 of the Plan. 

D. Transfer. Notwithstanding any provision in the Plan to the contrary, assets allocated to the InfraSource Plan No. 2 accounts of
any individual who, in connection with the termination of the InfraSource Plan No. 2, elected to transfer his or her benefits thereunder to the Plan or who did not make a timely election with respect to his or her benefits under the InfraSource
Plan No. 2, shall be transferred to the Plan as soon as administratively practicable after November 30, 2007 and credited to a separate account (“Affected Account”) under this Plan. 

E. Conflicts Between the Plan and this Supplement IV. This Supplement IV and the Plan together comprise the Plan with respect to
Affected Accounts. In case of any conflict between the provisions of the Plan and this Supplement IV, the terms and provisions of this Supplement IV shall govern to the extent necessary to eliminate such conflict. 

F. Vesting. Each Affected Participant shall be fully vested in his or her Affected Account. 

  
 V-1

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