Document:

Fourth Amendment to the Dynegy Northeast Generation Savings Incentive Plan

 Exhibit 10.22 
 FOURTH AMENDMENT TO THE 
 DYNEGY NORTHEAST GENERATION, INC. SAVINGS INCENTIVE PLAN

 WHEREAS, Dynegy Inc. (the “Company”), has established and maintains the Dynegy Northeast Generation, Inc. Savings Incentive
Plan (the “Plan”) for the benefit of the eligible employees of certain participating companies; and 
 WHEREAS, the Company desires
to amend the Plan; 
 NOW, THEREFORE, the Plan shall be, and hereby is amended as follows, effective as provided herein below: 
 I. 
 Effective January 1, 2006,
Section 1.1(13) of the Plan is amended in its entirety to provide as follows: 
 “(13) Compensation: The base pay (excluding
all overtime, bonuses and other payments) paid by the Employer to or for the benefit of a Participant for services rendered or labor performed for the Employer while a Participant and an Eligible Employee. In determining base pay, the following
shall be included, namely, elective contributions made on a Participant’s behalf by the Employer that are not includible in income under section 125, section 402(e)(3), or section 402(h) of the Code, any amounts that are not includible in the
gross income of a Participant under a salary reduction agreement by reason of the application of section 132(f) of the Code and, if a Participant is scheduled to work a 12 hour shift, the regularly scheduled overtime shall be included as
Compensation, and is calculated by multiplying his straight time hourly rate of pay by the number of 12 hour shift regularly scheduled overtime hours for which he is paid. The Compensation of any Participant taken into account for purposes of the
Plan shall be limited to $220,000 for any Plan Year with such limitation to be: adjusted automatically to reflect any amendments to section 401(a)(17) of the Code and any cost-of-living increases authorized by section 401(a)(17) of the Code.”

 II. 
 Effective January 1, 2006, Section 1.1(28) of the Plan is amended in its entirety to provide as follows and all references in the Plan to the phrase “Employer Safe Harbor Contribution Account”
shall be replaced with the phrase “Employer Discretionary Qualified Matching Contribution Account”: 
 “(28) Employer
Discretionary Qualified Matching Contribution Account: An individual account for each Participant which is credited with the Employer Discretionary Qualified Matching Contributions, if any, made pursuant to Section 3.4 or Section 3.5,
as adjusted to reflect changes in valued as provided in Section 4.3.” 
 III. 
 Effective January 1, 2006, Section 1.1(29) of the Plan is amended in its entirety to provide as follows and all references in the Plan to the
phrase “Employer Safe Harbor Contributions” shall be replaced with the phrase “Employer Discretionary Qualified Matching Contributions”: 
 “(29) Employer Discretionary Qualified Matching Contributions: Contributions made to the Plan by the Employer pursuant to Section 3.4.” 
 IV. 
 Effective January 1, 2006, a new Section 1.1 (38A) is added
to the Plan to provide as follows: 
 “(38A) Severance from Employment: The term ‘Severance from Employment’ shall have
the same meaning as set forth in Treasury regulation section 1.401(k)-1(d). A Severance from Employment occurs when the Participant ceases to be an Employee of an Employer maintaining the Plan. An Employee does not have a Severance from Employment
if, in connection with a change of employment, the Employee’s new employer maintains such Plan with respect to the 

  

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Employee. For example, if a new employer maintains the Plan with respect to an Employee by continuing or assuming sponsorship of the Plan or by accepting a
transfer of Plan assets and liabilities (within the meaning of section 414(1) of the Code) with respect to the Employee, such Employee does not have a Severance from Employment.” 
 V. 
 Effective January 1, 2006, the following sentences shall be added to
the end of Section 3.1 (a) of the Plan: 
 “Such elections cannot relate
to Compensation that is currently available prior to the adoption or effective date of the Plan. In addition, except for occasional, bona fide administrative considerations, contributions made pursuant to such an election cannot precede the earlier
of (1) the performance of services relating to the contribution and (2) when the Compensation that is subject to the election would be currently available to the Participant in the absence of an election to defer. Such can only be made
with respect to amounts that are compensation as defined under Code section 415(c)(3) and Treasury regulation section 1.415(c)-2. A Participant who is not in Qualified Military Service (as defined in Code section 414(u)) cannot make an election with
respect to an amount paid after the Participant’s Severance from Employment, unless the amount is paid within 2 1/2 months following the Participant’s Severance from Employment and is described in Treasury regulation section 1.415(c)-2(e)(3)(ii). 
 In order to be taken into account for a Limitation Year, compensation as defined under Code section 415(c)(3) must be paid or treated as paid to the Participant prior to Severance from Employment.” 
 VI. 
 Effective January 1, 2006,
Section 3.1(e) of the Plan is amended in its entirety to provide as follows: 
 “(e) In further restriction of
the Participants’ elections provided in Paragraphs (a), (b), and (c) above, it is specifically provided that one of the actual deferral percentage tests set forth in section 401(k)(3) of the Code and Treasury regulations thereunder
(‘ACP Test’) must be met in each Plan Year. Such testing shall 

  

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utilize the current year testing method as such term is defined under Treasury regulation section 1.401(k)-2(a)(2)(ii). The actual deferral ratio (as such
term is defined under Treasury regulation section 1.401(k)-6) (‘ADR’) of any Participant who is a Highly Compensated Employee for the Plan Year and who is eligible to have Before-Tax Contributions (and Employer Discretionary Qualified
Matching Contributions, if treated as elective contributions for purposes of the ACP Test) allocated to such Participant’s accounts under two (2) or more cash or deferred arrangements described in Code section 401(k), that are maintained
by an Employer (or a Controlled Entity), shall be determined as if such elective contributions (and, if applicable, such Qualified Matching Contributions) were made under a single arrangement. If a Highly Compensated Employee participates in two
(2) or more cash or deferred arrangements of the Employer or a Controlled Entity that have different Plan Years, then all elective contributions made during the Plan Year being tested under all such cash or deferred arrangements shall be
aggregated, without regard to the plan years of the other plans. However, for Plan Years beginning before January 1, 2006, if the plans have different Plan Years, then all such cash or deferred arrangements ending with or within the same
calendar year shall be treated as a single cash or deferred arrangement. Notwithstanding the foregoing, certain plans shall be treated as separate if mandatorily disaggregated under the regulations of Code section 401(k).” 
 VII. 
 Effective January 1, 2006,
Section 3.4 of the Plan is amended in its entirety to provide as follows: 
 “3.4 Employer Discretionary
Qualified Matching Contributions. In addition to the Employer Matching Contributions made pursuant to Section 3.3, for each Plan Year, the Employer, in its discretion, may contribute to the Trust as an Employer Discretionary Qualified
Matching Contribution for such Plan Year the amounts necessary to cause the Plan to satisfy the restrictions set forth in Section 3.1(e) (with respect to certain restrictions on Before-Tax Contributions) and the amounts necessary to cause
the Plan to satisfy the restrictions set forth in Section 3.5 (with respect to certain restrictions on Employer Matching Contributions and After-Tax Contributions). Amounts contributed in order to satisfy the restrictions set forth in
Section 3.1(e) shall be considered ‘Qualified Matching Contributions’ (within the meaning of Treasury regulation section 1.401(k)-6), and amounts contributed in order to satisfy the restrictions set forth in Section 3.5
shall be considered Employer Matching Contributions. 
  

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 Employer Discretionary Qualified Matching Contributions may be contributed to the Plan pursuant to the
foregoing for purposes of satisfying the restrictions set forth in Section 3.1(e) only if the conditions described in Treasury regulation section 1.401(k)-2(a)(6) are satisfied. A contribution made pursuant to this Section 3.4 is not
taken into account under the actual contribution percentage test (as defined under Treasury regulation section 1.401(k)-6) (‘ACP Test’) or in determining the ADR for a Participant who is not a Highly Compensated Employee (a
‘NHCE’) to the extent that it exceeds the greatest of: 
 (a) five percent (5%) of the NHCE’s Code section
414(s) compensation for the Plan Year; 
 (b) the NHCE’s Before-Tax Contributions for the Plan Year; and 
 (c) the product of two (2) times the Plan’s ‘Representative Matching Rate’ (as defined below) and the NHCE’s
Before-Tax Contributions for the Plan Year. 
 Any amounts contributed pursuant to this Paragraph shall be allocated in accordance with the
provisions of Sections 4.1(d), (e) and (f). For purposes of this Paragraph, the ‘Matching Rate’ for a Participant generally is the Employer Matching Contributions made for such Participant divided by the Participant’s Before-Tax
Contributions for the Plan Year. For purposes of this Paragraph, the ‘Representative Matching Rate’ is the lowest matching rate for any eligible NHCE among a group of NHCEs that consists of half of all eligible NHCEs in the Plan for the
Plan Year (or, if greater, the lowest matching rate for all eligible NHCEs in the Plan who are employed by the Employer on the last day of the Plan Year and who make Before-Tax Contributions for the Plan Year). If the Matching Rate is not the same
for all levels of Before-Tax Contributions for a Participant, then the Participant’s Representative Matching Rate is determined assuming that a Participant’s Before-Tax Contributions are equal to six percent (6%) of his Code section
414(s) compensation.” 
  

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 Contribution Limitation has been reached as to such Eligible Participant, and continuing in such manner until the
Employer Discretionary Qualified Matching Contribution for such Plan Year has been completely allocated or the 401(m) Additional Contribution Limitation has been reached as to all Eligible Participants.” 
 XIII. 
 Effective January 1,
2006, a new Section 4.5 is added to the Plan to provide as follows: 
 “4.5 Recharacterizations. In the event a
Participant’s Before-Tax Contributions for a Plan Year do not equal a limitation described in Section 3.9 for any reason whether or not related to an election by a Participant, his catch-up contributions, if any, for such Plan Year shall
be recharacterized as Before-Tax Contributions for all purposes to the extent necessary to either (i) increase Before-Tax Contributions to equal such limitation, or (ii) exhaust the catchup contributions made for such Plan Year; provided;
however, in no event shall such recharacterized catch-up contributions be eligible to be matched by Employer Matching Contributions. 
 In the event a Participant who is eligible to elect catch-up contributions pursuant to the provisions of Section 3.9 is determined by the Committee, applying the provisions of Section 3.8, to have excess deferrals for a Plan Year,
then before causing a distribution of such Participant’s excess deferrals, the Committee may cause such Participant’s Before-Tax Contributions to be recharacterized as catch-up contributions to the extent necessary to either
(i) exhaust his excess deferrals, or (ii) increase his catch-up contributions to the applicable limit under Code section 414(v) for the Plan Year.” 
 XIV. 
 Effective August 29, 2005, Section 11.1(c) of the Plan is amended in its entirety to
provide as follows: 
 “(c) A Participant, who is an Employee, and who has a financial hardship, as determined by the
Committee, and who has made all available withdrawals pursuant to the Paragraphs above and pursuant to the provisions of any other plans of the Employer and any Controlled Entities of which he is a member and 

  

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who has obtained all available loans pursuant to Article XII and pursuant to the provisions of any other plans of the Employer and any Controlled Entities of
which he is a member may withdraw from the following Accounts, and in the following order, his Rollover Contribution Account, his Before-Tax Account, his catch-up contribution account established pursuant to Section 3.9 and his Employer
Contribution Account an amount not to exceed the lesser of (1) the balance of such Accounts or (2) the amount determined by the Committee as being available for withdrawal pursuant to this Paragraph. In all cases, the minimum amount of a
hardship distribution and the limits on the number of hardship distributions shall be determined under rules and procedures adopted by the Committee from time to time. For purposes of this Paragraph, financial hardship shall mean the immediate and
heavy financial needs of the Participant. A withdrawal based upon financial hardship pursuant to this Paragraph shall not exceed the amount required to meet the immediate financial need created by the hardship and not reasonably available from other
resources of the Participant. The amount required to meet the immediate financial need may include any amounts necessary to pay any federal, state, or local income taxes or penalties reasonably anticipated to result from the distribution. A
withdrawal shall be deemed to be made on account of an immediate and heavy financial need of a Participant if the withdrawal is for: 
 (1) Expenses for medical care described in section 213(d) of the Code previously incurred by the Participant, the Participant’s spouse, or any dependents of the Participant (as defined in section 152 of the Code) or necessary for those
persons to obtain medical care described in section 213(d) of the Code and not reimbursed or reimbursable by insurance; 
 (2)
Costs directly related to the purchase of a principal residence of the Participant (excluding mortgage payments); 
 (3)
Payment of tuition and related educational fees, and room and board expenses, for the next twelve months of post-secondary education for the Participant or the Participant’s spouse, children, or dependents (as defined in section 152 of the
Code); 
 (4) Payments necessary to prevent the eviction of the Participant from his principal residence or foreclosure on the
mortgage of the Participant’s principal residence; or 
  

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 (5) Expenses permitted under Internal Revenue Service Announcement 2005-70 with respect
to special hardship distributions permitted for affected persons of Hurricane Katrina (i) whose principal residence was located in one of the disaster areas eligible for Individual Assistance by the Federal Emergency Management Agency because
of Hurricane Katrina on the relevant declared disaster date (ii) whose place of employment was located in one of these disaster areas on the relevant declared disaster date, or (iii) whose lineal ascendant or descendant, dependent or
spouse had a principal residence or place of employment in one of these disaster areas on the relevant declared disaster date. Such distribution must be made on or after August 29, 2005, and before April 1, 2006.” 
 XVI. 
 Effective January 1, 2007,
Section 11.1(c) of the Plan is amended in its entirety to provide as follows: 
 “(c) A Participant, who is an
Employee, and who has a financial hardship, as determined by the Committee, and who has made all available withdrawals pursuant to the Paragraphs above and pursuant to the provisions of any other plans of the Employer and any Controlled Entities of
which he is a member and who has obtained all available loans pursuant to Article XII and pursuant to the provisions of any other plans of the Employer and any Controlled Entities of which he is a member may withdraw from the following Accounts, and
in the following order, his Rollover Contribution Account, his Before-Tax Account, his catch-up contribution account established pursuant to Section 3.9 and his Employer Contribution Account an amount not to exceed the lesser of (1) the
balance of such Accounts or (2) the amount determined by the Committee as being available for withdrawal pursuant to this Paragraph. In all cases, the minimum amount of a hardship distribution and the limits on the number of hardship
distributions shall be determined under rules and procedures adopted by the Committee from time to time. For purposes of this Paragraph, financial hardship shall mean the immediate and heavy financial needs of the Participant. A withdrawal based
upon financial hardship pursuant to this Paragraph shall not exceed the amount required to meet the immediate financial need created by the hardship and not reasonably available from other resources of the 

  

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Participant. The amount required to meet the immediate financial need may include any amounts necessary to pay any federal, state, or local income taxes or
penalties reasonably anticipated to result from the distribution. A withdrawal shall be deemed to be made on account of an immediate and heavy financial need of a Participant if the withdrawal is for: 
 (1) Expenses for (or necessary to obtain) medical care that would be deductible under section 213(d) of the Code (determined without
regard to whether the expenses exceed 7.5% of adjusted gross income); 
 (2) Costs directly related to the purchase of a
principal residence of the Participant (excluding mortgage payments); 
 (3) 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 and without regard to sections 152(b)(1), (b)(2)
and (d)(1)(B)); 
 (4) Payments necessary to prevent the eviction of the Participant from his principal residence or
foreclosure on the mortgage of the Participant’s principal residence; 
 (5) Payments for burial or funeral expenses for
the Participant’s deceased parent, spouse, children or dependents (as defined in section 152 of the Code and without regard to sections 152(b)(1), (b)(2) and (d)(1)(B)); or 
 (6) Expenses for the repair of damage to the Participant’s principal residence that would qualify of the casualty deduction under
section 165 of the Code (determined without regard to whether the loss exceeds 10% of adjusted gross income); or 
 (7)
Expenses permitted under Internal Revenue Service Announcement 2005-70 with respect to special hardship distributions permitted for affected persons of Hurricane Katrina (i) whose principal residence was located in one of the disaster areas
eligible for Individual Assistance by the Federal Emergency Management Agency because of Hurricane Katrina on the relevant declared disaster date (ii) whose place of employment was located in one of these 

  

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disaster areas on the relevant declared disaster date, or (iii whose lineal ascendant or descendant, dependent or spouse had a principal residence or place
of employment in one of these disaster areas on the relevant declared disaster date. Such distribution must be made on or after August 29, 2005, and before April 1, 2006.” 
 XVII. 
 Effective August 25, 2005, a new Section 11.3 of the Plan is
added to the Plan to provide as follows: 
 “11.3 Special Hurricane Relief Distributions. A distribution
may be made on and after August 25, 2005 (for distributions made on account of Hurricane Katrina), September 22, 2005 (for distributions made on account of Hurricane Rita), or October 22, 2005 (for distributions made on account of
Hurricane Wilma), and before January 1, 2007, to an eligible Participant to the extent such distribution is approved by the Committee and permitted under Section 101 of the Katrina Emergency Tax Relief Act of 2005 (‘KETRA’) and
Section 201 of the Gulf Opportunity Zone Act of 2005 (‘GO zone’). An individual is eligible to receive such a distribution if the individual (i) had a principal place of abode in the Hurricane Katrina, Wilma or Rita disaster
areas (as defined under KETRA and GO Zone) as of the relevant dates (as specified under KETRA and GO Zone), and (ii) sustained economic loss by reason of Hurricane Katrina, Wilma or Rita. Withdrawals made pursuant to this Section 11.3
shall be limited to the greater of (i) $100,000 or (ii) the vested balance of a Participant’s Accounts. In determining the $100,000 maximum distribution amount, distributions received from any plans maintained by the Employer or a
Controlled Entity and any other qualified plans, annuities and individual retirement accounts shall be taken into account. A Participant may elect to repay such distribution and a qualified hurricane distribution under Section 11.1(c)(5) within
three years to this Plan or another eligible retirement plan or not repay the distribution, in which case such distribution may be included as taxable income ratably over a period of three (3) years or a period of one (1) year. Such
amounts that are repaid pursuant to this Section 11.3 shall be treated as a qualified rollover to the Plan. The Committee is permitted to rely on the reasonable representations of the Participant with respect to the Participant’s
eligibility to receive a distribution pursuant to this Section 11.3, unless the Committee has actual knowledge to the contrary.” 
  

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 XVIII. 
 Effective January 1, 2006, Section 12.2(b) of the Plan is amended in its entirety to provide as follows: 
 “(b) Paragraph (a) above to the contrary notwithstanding, no loan shall be made from the Plan to the extent that such loan would cause the total of all loans made to a Participant from all qualified plans of
an Employer or a Controlled Entity, including loans deemed distributed in accordance with regulations promulgated under section 72(p) of the Code, and the interest accruing thereafter, that has not been repaid (‘Outstanding Loans’) to
exceed the lesser of: 
 (1) $50,000 (reduced by the excess, if any, of (A) the highest outstanding balance of
Outstanding Loans during the one-year period ending on the day before the date on which the loan is to be made, over (B) the outstanding balance of Outstanding Loans on the date on which the loan is to be made); or 
 (2) one-half the present value of the Participant’s nonforfeitable accrued benefit under all qualified plans of the Employer or a
Controlled Entity.” 
 XIX. 
 Effective as of January 1, 2006, Section 12.5(b) of the Plan is amended by adding the following sentence after the penultimate sentence thereof: 
 “Notwithstanding the foregoing, in the event that a loan from the Plan is deemed distributed to a Participant and has not been repaid by the Participant, and the Participant applies for another loan from the
Plan, then the new loan shall satisfy such additional conditions as may required in accordance with section 72(p) of the Code and the Treasury regulations promulgated thereunder.” 
  

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 XX. 
 Effective January 1, 2007, Section 12.6(c) of the Plan is amended in its entirety to provide as follows: 
 “(c) If the Participant fails in any way to comply with the repayment terms of a loan, such loan shall be repaid by offsetting the Participant’s outstanding loan balance (including interest) against the
amount in the Participant’s segregated loan fund pledged as security for the loan. Any such outstanding loan (including interest) shall be so offset and repaid on the earlier of (1) the last day of the ‘Grace Period’ (as
hereinafter defined) applicable with respect to such failure to comply or (2) the date of any withdrawal or distribution of benefits from the pledged portion of the Participant’s Accounts pursuant to the provisions of the Plan.
Notwithstanding the foregoing, amounts in a Participant’s Accounts may not be offset and used to satisfy the payment of such loan (including interest) prior to the earliest time such amounts would otherwise be permitted to be distributed under
applicable law. For purposes of this Paragraph, the ‘Grace Period’ with respect to any failure to comply with the repayment terms of a loan shall be the period beginning on the date of such failure and ending on the last day of the
calendar quarter following the calendar quarter in which such failure occurred.” 
 XXI. 
 Effective August 25, 2005, a new Section 12.8 is added to the Plan to provide as follows: 
 “12.8 Special Hurricane Relief Loans. A special loan may be made to an eligible Participant on and after
September 24, 2005, for Participants affected by Hurricane Katrina; and on and after December 21, 2005, for Participants affected by Hurricane Rita or Hurricane Wilma; and before December 31, 2006, to the extent that such loan is
approved by the Committee and permitted under Section 103 of KETRA and Section 201 of GO Zone. With respect to a loan made pursuant to this Section 12.7, the reference to $50,000 in Section 12.2(b)(1) shall be increased to
$100,000 and the reference to ‘one-half the present value’ in Section 12.2(b)(2) shall be increased to ‘the present value’. A Participant is eligible to receive such a loan if the Participant (i) had a principal place
of abode in the Hurricane Katrina, Wilma or Rita disaster areas (as defined under KETRA and GO Zone) as of the relevant dates (as specified under KETRA and GO Zone), and (ii) sustained economic loss by reason of Hurricane Katrina, Wilma or
Rita. In addition, for an eligible Participant, as defined above, with an outstanding Plan loan on or after August 25, 2005 (for Participants whose main home was located in Hurricane Katrina disaster area), September 23, 2005 (for
Participants whose main home was located in Hurricane 

  

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Rita disaster area), or October 23, 2005 (for Participants whose main home was located in Hurricane Wilma disaster area), if the due date for any
repayment on such loan occurs during the period beginning on August 25, 2005, September 23, 2005 or October 23, 2005, as applicable, and ending on December 31, 2006, the due date may be delayed for one (1) year by the
Committee. Any payments after the suspension period will be appropriately adjusted to reflect the delay and any interest accruing during the delay.” 
 XXII. 
 Effective January 1, 2006, Section 17.2(c) of the Plan is amended by added the
following provisions at the end thereof: 
 “In the case of a termination of the Plan, the Accounts of a Participant
shall, subject to the consent provisions of Article X, be distributed to such Participant in a ‘lump sum distribution’ as such term is defined below; provided, however, a distribution may not be made if the Employer establishes or
maintains another ‘Alternative Defined Contribution Plan’. For purposes of this Section 17.2(c), an ‘Alternative Defined Contribution Plan’ is a defined contribution plan that exists at any time during the period beginning
on the date of Plan termination and ending 12 months after distribution of all assets from the terminated Plan. However, if at all times during the 24-month period beginning 12 months before the date of Plan termination, fewer than 2% of the
employees who were eligible under the defined contribution plan that includes the cash or deferred arrangement as of the date of Plan termination are eligible under the other defined contribution plan, the other Plan is not an Alternative Defined
Contribution Plan. In addition, a defined contribution plan is not treated as an Alternative Defined Contribution Plan if it is an employee stock ownership plan, as defined in section 4975(e)(7) or section 409(a) of the Code, a simplified employee
pension plan as defined in Code section 408(k), a SIMPLE IRA plan as defined in Code section 408(p), a plan or contract that satisfies the requirements of Code section 403(b), or a plan that is described in Code section 457(b) or (f). The term
‘lump sum distribution’ shall have the meaning provided in Code section 402(e)(4)(D) (without regard to section 402(e)(4)(D)(i)(l), (II), (III) and (IV). In the case of a Participant who is affected by a partial termination of the Plan,
the Accounts of such Participant shall, subject to the consent provisions of Article X, be distributed in accordance with the applicable provisions of Article X after he has incurred a Severance from Employment.” 
  

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 XXIII. 
 Effective January 1, 2006, Section 10.1(f) of the Plan is amended in its entirety to provide as follows: 
 “(g) Notwithstanding the provisions of the Plan regarding availability of distributions from the Plan upon ‘termination of employment’, a Participant’s Accounts shall not be distributed until the
Participant has incurred a Severance from Employment. 
 XXIV. 
 Except as modified herein, the Plan shall remain in full force and effect. 
 IN WITNESS WHEREOF, the undersigned has caused this Amendment to the Plan to be executed this 15 day of December, 2006, effective as hereinbefore provided. 
  

			
	DYNEGY INC.
		
	By:	 	/s/ Julius Cox
	Title:	 	VP, Human Resources & BPC Chairman

  

 -18-Fifth Amendment to the Dynegy Inc. 401(k) Savings Plan

 Exhibit 10.23 
 FIFTH AMENDMENT TO THE 
 DYNEGY INC. 401(k) SAVINGS PLAN 
 WHEREAS, Dynegy Inc. (the “Company”), has established and maintains the Dynegy Inc. 401(k) Savings Plan (the “Plan”) for the
benefit of its eligible employees and the eligible employees of certain participating companies; and 
 WHEREAS, the Company desires to amend
the Plan; 
 NOW, THEREFORE, BE IT RESOLVED that the Plan shall be, and hereby is amended as follows, effective as of January 1, 2005:

 I. 
 Section 1.1(32) of the Plan is hereby amended in its entirety to provide as follows: 
  

	 	“(32)	Employer: The Company and each other entity that has been designated to participate in the Plan pursuant to the provisions of Article XVIII.”

 II. 
 The
following provision is hereby added to the end of Section 3.9(c) of the Plan to provide as follows: 
 “Notwithstanding the
foregoing, if an Eligible Employee’s interest under a qualified plan described in Section 401(a) of the Code is distributed in connection with an acquisition of stock or assets by an Employer or a Controlled Entity, the Eligible
Employee’s entire outstanding loan under such plan may be contributed as a Rollover Contribution to this Plan, in accordance with this Section 3.9, provided that the transferor plan provides the Committee with a current favorable IRS
determination letter issued to such transferor plan and trust or such other evidence that the Committee in its discretion deems satisfactory to establish that the proposed Rollover Contribution is in fact eligible for rollover to the Plan and is
made pursuant to and in accordance with applicable provisions of the Code and Treasury regulations. The Committee shall determine, in its discretion, whether or not a distribution is made in connection with an acquisition of stock or assets by an
Employer or a Controlled Entity.” 

 III. 
 Except as modified herein, the Plan shall remain in full force and effect. 
 IN WITNESS WHEREOF, the undersigned has caused this Fifth Amendment to the Plan to be executed this 28th day of January, 2005, effective as hereinbefore provided. 
  

			
	DYNEGY INC.
		
	By:	 	/s/ Illegible
	Title:	 	BPC - Chairman

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