Document:

EX-4.2

 Exhibit 4.2 

JACOBS SOLUTIONS INC. 

1999 STOCK INCENTIVE PLAN 

(As Amended and Restated as of August 29, 2022) 
  

	1.	 Purpose. 

The purpose of the Jacobs Solutions Inc. 1999 Stock Incentive Plan, as amended and restated on August 29, 2022 (formerly known as the
Jacobs Engineering Group Inc. 1999 Stock Incentive Plan, as amended and restated effective as of January 18, 2018) (the “Plan”), is to advance the long-term objectives of Jacobs Solutions Inc. (the “Company”) and its Related
Companies (as defined in Paragraph 2) by encouraging and enabling the acquisition of a financial interest in the Company by employees of the Company and its Related Companies. In addition, the Plan is intended to attract and retain such employees,
and to align and strengthen their interests with those of the Company’s shareholders. This Plan was renamed and amended and restated on August 29, 2022 solely to reflect the Company’s reorganization on August 29, 2022. 

 

	2.	 Definitions. 

Unless the context clearly indicates otherwise, the following terms, when used in this Plan, shall have the meanings set forth in this
Paragraph 2. 
 “Award” means any award of an Option, Stock Appreciation Right, Restricted Stock, Restricted Stock Unit or
Incentive Bonus granted pursuant to the Plan. 
 “Award Agreement” means any agreement, contract document or other instrument
evidencing an Award. “Board of Directors” means the Board of Directors of the Company. 
 “Cause” means (unless
otherwise expressly provided in an award agreement or another contract, including an employment agreement) the Company or a Related Company’s termination of the Employee’s employment with the Company or any Related Company, as applicable,
following the occurrence of any one or more of the following: (a) the Employee is convicted of, or pleads guilty or nolo contendere to, a felony; (b) the Employee willfully and continually fails to substantially perform the Employee’s
duties with the Company or any Related Company after written notification by the Company or any such Related Company; (c) the Employee willfully engages in conduct that is materially injurious to the Company or any Related Company, monetarily
or otherwise; (d) the Employee commits an act of gross misconduct in connection with the performance of the Employee’s duties to the Company or any Related Company; or (e) the Employee materially breaches any employment,
confidentiality or other similar agreement between the Company or any Related Company and the Employee. 
 “Change in Control”
means, with respect to the Company, a change in control of a nature that would be required to be reported in response to Item 6(e) of Schedule 14A of Regulation 14A under the Securities Exchange Act of 1934, as amended (the “1934 Act”),
provided that such a change in control shall be deemed to have occurred at such time as (a) any “person” (as that term is used in Sections 13(d) and 14(d)(2) of the 1934 Act) is or becomes the “beneficial

 
owner” (as defined in Rule 13d-3 under the 1934 Act), directly or indirectly, of securities representing 35% or more of the combined voting power for
election of directors of the then outstanding securities of the Company or any successor of the Company; (b) during any period of two (2) consecutive years or less, individuals who at the beginning of such period constituted the Board of
Directors cease, for any reason, to constitute at least a majority of the Board of Directors, unless the election or nomination for election of each new director was approved by a vote of at least two-thirds
of the directors then still in office who were directors at the beginning of the period; (c) the consummation of any merger or consolidation as a result of which the Common Stock (as defined below) shall be changed, converted or exchanged
(other than by merger with a wholly owned subsidiary of the Company) or any liquidation of the Company or any sale or other disposition of 50% or more of the assets or earning power of the Company; or (d) the consummation of any merger or
consolidation to which the Company is a party as a result of which the persons who were shareholders of the Company immediately prior to the effective date of the merger or consolidation shall have beneficial ownership of less than 50% of the
combined voting power for election of directors of the surviving corporation following the effective date of such merger or consolidation; provided, however, that no Change in Control shall be deemed to have occurred if, prior to such time as a
Change in Control would otherwise be deemed to have occurred, the Board of Directors of the Company determines otherwise. Notwithstanding the foregoing, with respect to an Award that is (i) subject to Section 409A and (ii) if a Change
in Control would accelerate the timing of payment thereunder, then the term “Change in Control” shall mean a change in the ownership or effective control of the Company, or in the ownership of a substantial portion of the assets of the
Company as defined in Section 409A and the authoritative guidance issued thereunder, but only to the extent inconsistent with the above definition, and only to the minimum extent necessary to comply with Section 409A as determined by the
Committee. 
 “Code” means the Internal Revenue Code of 1986, as amended from time to time. 

“Committee” means the Human Resource and Compensation Committee of the Board of Directors, or any committee appointed by the Board
of Directors in accordance with the Company’s By-Laws from among its members for the purpose of administering the Plan. Members of the Committee shall be “Non Employee Directors” within the
meaning of Rule 16b-3 under the 1934 Act, and “Outside Directors” as defined in IRS guidance issued under Section 162(m). 

“Common Stock” means the common stock of the Company, par value $ 1.00 per share. 

“Disabled” or “Disability” means the Participant meets the definition of “disabled” under the terms of the long
term disability plan of the Company or Related Company by which the Participant is employed, in effect on the date in question, whether or not the Participant is covered by such plan. 

“Dividend Equivalent Right” is defined in Paragraph 8. 

“Employee” means an employee of the Company or a Related Company. 

  
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 “Fair Market Value” means the closing price of one Share of Common Stock as
reported in the composite transactions report of the U.S. national securities exchange on which the Common Stock is then listed, and if such exchange is not open that day, then the Fair Market Value shall be determined by reference to the closing
price of the Common Stock for the immediately preceding trading day. 
 “Good Reason” means, without the Participant’s
consent (a) a material reduction in the position, duties or responsibilities of the Participant from those in effect immediately prior to such change; (b) a reduction in the Participant’s base salary; (c) a relocation of the
Participant’s primary work location to a distance of more than 50 miles from its location as of immediately prior to such change; or (d) a material breach by the Participant’s employer of any employment agreement between the Company
and the Participant. 
 “Incentive Bonus” means a bonus award made under Paragraph 9 pursuant to which a Participant may become
entitled to receive cash payments based on satisfaction of such performance criteria as are specified in the applicable Award Agreement or subplan(s). 

“ISO” means an incentive stock option within the meaning of Section 422 of the Code. 

“Majority-Owned Related Company” means a Related Company in which the Company owns, directly or indirectly, 50% or more of the
voting stock on the date an Award is granted or awarded. 
 “NQSO” means a stock option that does not constitute an ISO.
“Options” means ISOs and NQSOs granted under the Plan. 
 “Participant” means an Employee who is selected by the
Committee to receive an Award under the Plan. 
 “Qualifying Termination” means a termination of an Employee’s employment
with the Company (a) by the Company for any reason other than Cause or death or Disability or (b) by the Employee for Good Reason. 

“Related Company” or “Related Companies” means corporation(s) or other business organization(s) in which the Company holds
a sufficient ownership interest so that Common Stock issued to the employees of such entities constitutes “service recipient stock,” as defined in IRS guidance under Section 409A. In general, the Company holds a sufficient ownership
interest if it owns, directly or indirectly, at least 50% of the total combined voting power of all classes of stock entitled to vote or at least 50% of the total value of shares of all classes of stock. However, to the extent permitted by IRS
guidance under Section 409A, “20%” shall be used instead of “50%” in the previous sentence. 
 “Restricted
Stock” means shares of Common Stock awarded pursuant to Paragraph 8 of the Plan. 
 “Restricted Stock Unit” means an Award
granted pursuant to Paragraph 8 of the Plan, pursuant to which Shares (or an amount of cash valued with reference to Shares) may be issued in the future, along with any associated Dividend Equivalent Rights. 

  
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 “Retire” means to enter Retirement. 

“Retirement” means the termination of a Participant’s employment with the Company or a Related Company by reason of a
Participant having either (a) attained the age of 65, or (b) attained the age of 60 and completed a total of ten or more consecutive years of employment with the Company, and/or a Related Company. 

“Section 162(m)” means Section 162(m) of the Code and the regulations promulgated thereunder. 

“Section 409A” means Section 409A of the Code and the regulations promulgated thereunder. 

“Shares” means the shares of Common Stock. 

“Stock Appreciation Right” or “SAR” means the right granted pursuant to Section 7 of the Plan. 

“Time-Based RSU” is defined in Paragraph 8. 
  

	3.	 Eligibility; Award Agreements. 

Any Employee shall be eligible to be selected as a Participant, and the Company may grant Awards to those persons meeting such eligibility
requirements. Each Award shall be evidenced by an Award Agreement, which shall either be in writing in a form approved by the Committee and executed by the Company by an officer duly authorized to act on its behalf, or an electronic notice in a form
approved by the Committee and recorded by the Company (or its designee) in an electronic recordkeeping system; in each case and if required by the Committee, the Award Agreement shall be executed or otherwise electronically accepted by the recipient
in such form and manner as the Committee may require. Notwithstanding the foregoing, Incentive Bonuses may be payable under subplans and shall be granted as specified therein (which may or may not require an Award Agreement), at the discretion of
the Committee. The Award Agreement shall set forth the material terms and conditions of the Award established by the Committee and consistent with the provisions of the Plan. The terms of the Awards and the Award Agreements need not be the same with
respect to each Participant. A Participant may hold more than one Award at the same time. 
  

	4.	 Administration. 

 

	 	(a)	 The Plan shall be administered by the Committee. The Board of Directors shall fill vacancies on, and from time
to time may remove or add members to, the Committee. The Committee shall act pursuant to a majority vote or unanimous written consent. 

  

	 	(b)	 The Committee shall determine: the Participants to whom, and the time or times at which, Awards will be
granted; the type of Awards to be granted; the number of Shares (or amount of cash) to be subject to each Award and the form of settlement thereof; the duration of each Award; the time or times within which

  
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Options may be exercised; and any other terms and conditions of the Awards, at grant or while outstanding, pursuant to the terms of the Plan. The Committee shall also establish such rules and
regulations and appoint such agents as it shall deem appropriate for the proper administration of the Plan, and make any other determination and take any other action that the Committee deems necessary or desirable for the administration of the
Plan, including addressing unanticipated events (including any temporary closure of the stock exchange on which the Company is listed, disruption of communications or natural catastrophe). 

 

	 	(c)	 Except as provided in Paragraph 14, each determination or other action made or taken pursuant to the Plan,
including interpretations of the Plan and the specific conditions and provisions of the Awards, shall be final and conclusive for all purposes and upon all persons including, but without limitation, the Company, its Related Companies, the Committee,
the Board of Directors, Participants, and the respective successors in interest of any of the foregoing. 

  

	 	(d)	 Notwithstanding the foregoing, with respect to any Award that is not intended to satisfy the conditions of Rule
16b-3 under the 1934 Act or Section 162(m), and to the extent not inconsistent with applicable law or the rules and regulations of the principal U.S. national securities exchange on which the Shares are
traded, the Committee may appoint one or more separate committees (any such committee, a “Subcommittee”) composed of one or more directors of the Company, who unlike the members of the Committee, may be employee directors of the Company.
The Committee may delegate to any such Subcommittee(s), with respect to Employees who are not directors or executive officers of the Company, the authority to grant Awards, to determine all terms of such Awards and/or to administer the Plan,
pursuant to the terms of the Plan; provided that (i) any resolution of the Committee authorizing such Subcommittee must specify the total number of Shares subject to Awards that such Subcommittee may so award and (ii) the Committee may not
authorize any officer to designate himself or herself as the recipient of an Award. Subject to the limitations of the Plan and the limitations of the Committee’s delegation, any such Subcommittee would have the full authority of the Committee
pursuant to the terms of the Plan. Any such Subcommittee shall not, however, grant Awards on terms more favorable than Awards provided for by the Committee. Actions by any such Subcommittee within the scope of delegation shall be deemed for all
purposes to have been taken by the Committee. Any such Subcommittee shall be required to report to the Committee on any actions that the Subcommittee has taken. 

 

	 	(e)	 The Committee may designate the Secretary of the Company or any other Company employee to assist the Committee
in the administration of the Plan, and may grant authority to such persons to execute Award Agreements or other documents entered into under the Plan on behalf of the Committee or the Company. 

  
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	 	(f)	 The Company shall indemnify and hold harmless the members of the Board of Directors, and other persons who are
acting upon the authorization and direction of the Board of Directors, from and against any and all liabilities, costs and expenses incurred by such persons as a result of any act or omission in connection with the performance of such persons’
duties, responsibilities and obligations under the Plan, other than such liabilities, costs and expenses as may result from the bad faith, willful misconduct or criminal acts of such persons. 

 

	5.	 Shares and Share Counting. 

 

	 	(a)	 The Common Stock to be issued, transferred and/or sold under the Plan shall be made available from authorized
and unissued Common Stock or from the Company’s treasury shares. 

  

	 	(b)	 Subject to adjustment as provided in this Paragraph and Paragraph 13, the total number of Shares that may be
issued or transferred under the Plan pursuant to Awards may not exceed 29,850,000 Shares. For this purpose, every Share transferred pursuant to an Award granted after September 28, 2012 (i) that is an Option or SAR shall count as one Share and
(ii) every Share transferred pursuant to an Award granted after September 28, 2012 other than an Option or SAR shall count as 1.92 Shares. If any Awards granted before September 29, 2012 (“Prior Awards”) are forfeited, in
whole or in part, new Awards (“Subsequent Awards”) may be issued with respect to the Shares covered by such Prior Awards. For the purpose of determining the amount of Shares that may be issued pursuant to Subsequent Awards,
(1) forfeited Options and SARs shall be counted as one Share per each Share covered and Awards other than Options and SARs shall be counted as 1.92 Shares per each share covered, and (2) Shares issued pursuant to a Subsequent Award shall
count as either one Share (if the Award is an Option or SAR) or 1.92 Shares (in the case of an Award other than an Option or SAR). In the event that withholding tax liabilities arising from an Award other than an Option or SAR are satisfied by the
withholding of Shares by the Company, then the Shares so withheld shall again be available for Awards under the Plan and shall count as 1.92 Shares for each Share so withheld. Notwithstanding anything to the contrary contained herein, the following
Shares shall not be added to the Shares authorized for issuance or transfer under this Paragraph 5(b): (i) Shares tendered by the Participant in payment of the purchase price of an Option, (ii) Shares tendered by the Participant or withheld by
the Company to satisfy any tax withholding obligation with respect to Options or SARs, (iii) Shares subject to a SAR (that is, each SAR that is exercised shall reduce the number of Shares available by one Share), and (iv) Shares reacquired
by the Company on the open market or otherwise using cash proceeds from the exercise of Options. 

  

	 	(c)	 In the event that a company acquired by the Company or any Majority-Owned Related Company or with which the
Company or any Majority-Owned Related Company combines has shares available under a pre-existing plan approved by shareholders and not adopted in contemplation of such acquisition or combination, the shares
available for grant pursuant to the terms of such pre-existing plan (as adjusted, to the extent appropriate, using the exchange ratio or other formula used in such transaction to determine the consideration
payable to 

  
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the holders of common) may be used for Awards under the Plan and shall not reduce the Shares authorized for issuance or transfer under the Plan; provided that Awards using such available shares
shall not be made after the date awards or grants could have been made under the terms of the pre-existing plan, absent the acquisition or combination, and shall only be made to individuals who were not
Employees or directors prior to such acquisition or combination. 

  

	6.	 Options. 

  

	 	(a)	 Grant. Options may be granted hereunder to Participants either alone or in addition to other Awards. Any
Option shall be subject to the terms and conditions of the Plan and such additional terms and conditions, not inconsistent with the provisions of the Plan, as the Committee shall deem desirable. 

 

	 	(b)	 Option Price. The option price per each Share shall not be less than 100% of the Fair Market Value of
one Share on the date of grant of such Option; provided, however, that in the case of an ISO granted to a Participant who, at the time of the grant, owns stock representing more than 10% of the voting power of all classes of stock of the Company or
any subsidiary of the Company, the option price per Share shall be no less than 110% of the Fair Market Value of one Share on the date of grant. 

  

	 	(c)	 Duration of Options. The duration of Options shall be determined by the Committee, but in no event shall
the duration exceed ten years from the date of its grant; provided, however, that the term of the Option shall not exceed five years from the date the Option is granted in the case of an ISO granted to a Participant who, at the time of the grant,
owns stock representing more than 10% of the voting power of all classes of stock of the Company or any subsidiary of the Company. Notwithstanding the foregoing, in the event that on the last business day of the term of an Option (i) the
exercise of the Option, other than an ISO, is prohibited by applicable law or (ii) Shares may not be purchased or sold by certain Participants due to the “black-out period” pursuant to Company
policy or a “lock-up” agreement undertaken in connection with an issuance of securities by the Company, the term shall be extended for a period of 30 days following the end of the legal prohibition, black-out period or lock-up agreement. 

  

	 	(d)	 ISOs. With respect to each grant of an Option to an employee of the Company or any Company subsidiary,
the Committee shall determine whether such Option shall be an ISO, and, upon determining that an Option shall be an ISO, shall designate it as such in the written instrument evidencing such Option. Each written instrument evidencing an ISO shall
contain all terms and conditions required by Section 422 of the Code. If the written instrument evidencing an Option does not contain a designation that it is an ISO, it shall not be an ISO. The Employee to whom an ISO is granted must be
eligible to receive an ISO pursuant to Section 422 of the Code. Solely for purposes of determining whether Shares are available for the grant of ISOs under the Plan, the maximum aggregate number of Shares that may be issued pursuant to ISOs
granted under the Plan shall be 

  
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29,850,000 Shares, subject to adjustment as provided in Paragraph 13. The aggregate Fair Market Value (determined in each instance on the date on which an ISO is granted) of the Common Stock with
respect to which ISOs are first exercisable by any employee in any calendar year shall not exceed $100,000 for such employee. If any Majority-Owned Related Company of the Company shall adopt a stock option plan under which options constituting ISOs
may be granted, the fair market value of the stock on which any such ISOs are granted and the times at which such ISOs will first become exercisable shall be taken into account in determining the maximum amount of ISOs that may be granted to the
employee under this Plan in any calendar year. 

  

	 	(e)	 Exercise of Options. The Award Agreement shall specify when Options vest and become exercisable. An
Option may not be exercised in a manner that will result in fractional Shares being issued. 

  

	 	(i)	 Vested Options granted under the Plan shall be exercised by the Participant (or by a legal representative, to
the extent provided in an Award Agreement) as to all or part of the Shares covered thereby, by giving notice of exercise to the Company or its designated agent, specifying the number of Shares to be purchased. The notice of exercise shall be in such
form, made in such manner, and shall comply with such other requirements consistent with the provisions of the Plan as the Committee may prescribe from time to time. 

 

	 	(ii)	 Unless otherwise provided in an Award Agreement, full payment of such purchase price shall be made at the time
of exercise and shall be made: in cash or cash equivalents (including certified check or bank check or wire transfer of immediately available funds); by tendering previously acquired Shares (either actually or by attestation) valued at their then
Fair Market Value; through any other method specified in an Award Agreement (including same-day sales through a broker); or any combination of any of the foregoing. The notice of exercise, accompanied by such
payment, shall be delivered to the Company at its principal business office or such other office as the Committee may from time to time direct, and shall be in such form, containing such further provisions consistent with the provisions of the Plan,
as the Committee may from time to time prescribe. 

  

	7.	 Stock Appreciation Rights. 

 

	 	(a)	 Grant. The Committee may grant SARs in tandem with all or part of any Award (including Options) or at
any subsequent time during the term of such Award, or without regard to any other Award, in each case upon such terms and conditions as the Committee may establish. 

 

	 	(b)	 Grant Price and Duration. A SAR shall have a grant price per Share of not less than the Fair Market
Value of one Share on the date of grant or, if applicable, on the date of grant of an Option with respect to a SAR granted in tandem with the Option (subject to the requirements of Section 409A), and subject to adjustments provided in Paragraph
13. A SAR shall have a term not greater than ten years. 

  
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 Notwithstanding the foregoing, in the event that on the last business day of the term of a
SAR (i) the exercise of the SAR is prohibited by applicable law or (ii) Shares may not be purchased or sold by certain employees or directors of the Company due to the “black-out period” of
a Company policy or a “lock-up” agreement undertaken in connection with an issuance of securities by the Company, the term shall be extended for a period of 30 days following the end of the legal
prohibition, black-out period or lock-up agreement. 
  

	 	(c)	 Exercise. An Award Agreement covering a SAR shall provide when the SAR vests and becomes exercisable.
Upon the exercise of a SAR, the holder shall have the right to receive the excess of (i) the Fair Market Value of one Share on the date of exercise (or such amount less than such Fair Market Value as the Committee shall so determine at any time
during a specified period before the date of exercise) over (ii) the grant price of the SAR. Unless otherwise provided in the Award Agreement, the Committee shall determine in its sole discretion whether payment shall be made in cash or Shares,
or any combination thereof. 

  

	8.	 Awards of Restricted Stock and Restricted Stock Units. 

 

	 	(a)	 Grants. Awards of Restricted Stock and/or Restricted Stock Units may be granted to Participants either
alone or in addition to other Awards (a “Restricted Stock Award” or “Restricted Stock Unit Award,” respectively). Restricted Stock Units are Awards denominated in units of Common Stock under which settlement is subject to such
vesting conditions and other terms and conditions as the Committee deems appropriate. Each Restricted Stock Unit shall be equal to one share of Common Stock and shall, subject to satisfaction of any vesting and/or other terms and conditions, entitle
a recipient to the issuance of one share of Common Stock (or such equivalent value in cash) in settlement of the Award. The Board of Directors may establish procedures pursuant to which the payment of any Restricted Stock and/or Restricted Stock
Unit Award may be deferred, including under the Jacobs Solutions Inc. Executive Deferral Plan Further, the rest of this paragraph shall apply to Restricted Stock Units that vest solely based on the passage of time (“Time-Based RSUs”),
unless the relevant Award Agreement provides otherwise. Each Time-Based RSU shall entitle the Participant to a “Dividend Equivalent Right,” to the extent the Company pays a cash dividend with respect to its outstanding Common Stock while
the Time-Based RSU remains outstanding. The term “Dividend Equivalent Right” shall mean a dollar amount equal to the per-share cash dividend paid by the Company. Any Dividend Equivalent Right will be
subject to the same vesting, payment, and other terms and conditions as the Time- Based RSU to which it relates. Any Dividend Equivalent Right that vests will be paid in cash at the same time the share of Common Stock underlying the Time-Based RSU
to which it relates is delivered to the Participant. A Participant will not be credited with Dividend Equivalent Rights with respect to any Time-Based RSU that, as of the record date for the relevant dividend, is no longer outstanding for any reason
(e.g., because it has been settled in Common Stock or it has been terminated), and a Participant will not be entitled to any payment for Dividend Equivalent Rights with respect to any Time-Based RSU that terminates without vesting

  
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	 	(b)	 Conditions and Restrictions. Restricted Stock Awards and Restricted Stock Unit Awards may be subject to
time-based and/or performance-based vesting conditions. In the case of performance-based Awards, the performance goals to be achieved for each performance period shall be conclusively determined by the Committee and may be based upon the criteria
set forth in Paragraph 10(b) or such other criteria as determined by the Committee in its discretion. In order to enforce the restrictions imposed upon Restricted Stock Awards, the Committee may require the recipient to enter into an escrow
agreement providing that the certificates representing such Restricted Stock Awards shall remain in the physical custody of an escrow holder until any or all of the conditions and restrictions imposed pursuant to the Plan expire or shall have been
removed. 

  

	 	(c)	 Rights of Holders of Restricted Stock and Restricted Stock Units. Unless otherwise provided in the Award
Agreement, beginning on the date of grant of the Restricted Stock Award and subject to execution of the Award Agreement, the Participant shall become a shareholder of the Company with respect to all Shares subject to the Award Agreement and shall
have all of the rights of a shareholder, including the right to vote such Shares and the right to receive distributions made with respect to such Shares, except as otherwise provided in this Paragraph. Notwithstanding the foregoing, dividends or
other distributions that relate to a Restricted Stock or Restricted Stock Unit Award subject to performance based vesting criteria will be subject to the same performance criteria as the underlying Award. A Participant who holds a Restricted Stock
Unit Award shall only have those rights specifically provided for in the Award Agreement; provided, however, in no event shall the Participant have voting rights with respect to such Award. 

 

	 	(d)	 Minimum Vesting Period. Restricted Stock Awards and Restricted Stock Unit Awards shall have a vesting
period of not less than (i) three years from date of grant (but permitting pro rata vesting over such time) if subject only to continued service with the Company or a Majority-Owned Related Company and (ii) one year from date of grant if
subject to the achievement of performance objectives, subject in either case to accelerated vesting in the Committee’s discretion in the event of the death, Disability or Retirement of the Participant or a Change in Control. Notwithstanding the
foregoing, the restrictions in the preceding sentence shall not be applicable to grants of up to 5% of the number of Shares available for Awards on the effective date of the Plan. The Committee may, in its sole discretion waive the vesting
restrictions and any other conditions set forth in any Award Agreement under such terms and conditions as the Committee shall deem appropriate, subject to the minimum vesting period requirements in the prior sentence and the limitations imposed
under Section 162(m) (in the case of a Restricted Stock Award or Restricted Stock Unit Award intended to comply therewith), except as otherwise determined by the Committee to be appropriate under the circumstances. 

  
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	 	(e)	 Issuance of Shares. Any Restricted Stock granted under the Plan may be evidenced in such manner as the
Board may deem appropriate, including book-entry registration or issuance of a stock certificate(s), which certificate(s) shall be held by the Company. Such book entry registration, or certificate shall be registered in the name of the Participant
and shall bear an appropriate legend referring to the restrictions applicable to such Restricted Stock. 

  

	9.	 Incentive Bonus Awards. 

 

	 	(a)	 Grants. Awards of Incentive Bonuses may be granted hereunder to Participants either alone or in addition
to other Awards. Incentive Bonuses payable hereunder may be pursuant to one or more subplans or programs. 

  

	 	(b)	 Payment. Each Incentive Bonus will confer upon the Participant the opportunity to earn a future cash
payment the amount of which shall be based on the achievement of one or more objectively-determined performance goals or criteria established for a performance period determined by the Committee. 

 

	 	(c)	 Performance Goals. The Committee shall establish the performance goals or criteria on which each
Incentive Bonus shall be based. The Committee shall also affirmatively determine at the end of each performance period the level of achievement of any such performance goals or criteria that shall determine the target and maximum amount payable
under an Incentive Bonus, which criteria may be based on financial performance and/or personal performance evaluations. The Committee may specify to what extent an Incentive Bonus is intended to satisfy the requirements for “performance-based
compensation” under Section 162(m). Notwithstanding anything to the contrary herein, the performance criteria for any portion of an Incentive Bonus that is intended by the Committee to satisfy the requirements for “performance-based
compensation” under Section 162(m) shall be a measure based on one or more Qualifying Performance Criteria (as defined in Paragraph 10(b)) selected by the Committee and specified upon or prior to the grant of the Incentive Bonus.

  

	10.	 Qualifying Performance-Based Compensation. 

 

	 	(a)	 General. The Committee may specify that an Award or a portion of an Award is intended to satisfy the
requirements for “performance-based compensation” under Section 162(m), provided that, other than with respect to Options or SARs, the performance criteria for an Award or portion of an Award that is intended by the Committee to
satisfy the requirements for “performance-based compensation” under Section 162(m) shall be a measure based on one or more Qualifying Performance Criteria selected by the Committee and specified at the time the Award is granted. In
the case of any Award that is intended to satisfy the requirements for “performance-based compensation” under Section 162(m), the 

  
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Committee shall establish the performance criteria with respect to such Award not later than ninety (90) days after the commencement of the period of service to which the performance
criteria relate (or, in the case of performance periods of less than one year, not later than the date upon which 25% of the performance period elapses), provided that the outcome of the performance criteria is substantially uncertain at such time.
The Committee shall certify the extent to which any Qualifying Performance Criteria has been satisfied, and the amount payable as a result thereof, prior to payment, settlement or vesting. 

 

	 	(b)	 Performance Criteria. For purposes of this Plan, the term “Qualifying Performance Criteria”
shall mean any one or more of the following performance criteria, or derivations of such performance criteria, either individually, alternatively or in any combination, applied to either the Company as a whole, or to a business unit or group of
business units, or Related Company, measured either annually, at a point in time during a performance period, or as an average of values determined at various points of time during a performance period, or cumulatively over a period of years, on an
absolute basis or relative to a pre-established target, to previous years’ (or period’s) results or to a designated comparison group, or as a change in values during or between performance periods,
in each case as specified by the Committee: (i) revenues; (ii) earnings from operations, earnings before or after income taxes, earnings before or after interest, depreciation, amortization, or earnings before extraordinary or special items,
earnings before income taxes and any provision for Incentive Bonuses; (iii) net earnings or net earnings per common share (basic or diluted); (iv) return on assets (gross or net), return on investment, return on capital, or return on beginning,
ending or average equity; (v) cash flow, cash flow from operations, free cash flow, cash flow return on investment (discounted or otherwise), net cash provided by operations, or cash flow in excess of cost of capital; (vi) interest expense
after taxes; (vii) economic value added or created; (viii) operating margin or profit margin; (ix) stock price or total shareholder return; (x) average cash balance, net cash or cash position; and (xi) strategic business
criteria, consisting of one or more objectives based on meeting specified development, strategic partnering, licensing, research and development, market penetration, geographic business expansion goals, cost targets, customer satisfaction, employee
satisfaction, management of employment practices and employee benefits, supervision of litigation and information technology, and goals relating to acquisitions or divestitures of subsidiaries, affiliates or joint ventures. To the extent consistent
with Section 162(m), the Committee (A) may appropriately adjust any measurement of performance under a Qualifying Performance Criteria to eliminate the effects of charges for restructurings, discontinued operations, unusual or nonrecurring
or extraordinary items and all items of gain, loss or expense determined to be extraordinary or unusual in nature or related to the disposal of a segment of a business or related to a change in accounting principle all as determined in accordance
with accounting principles generally accepted in the United States, as well as the cumulative effect of accounting changes, in each case as determined in accordance with accounting principles generally accepted in the United States or identified in
the Company’s financial statements or notes to 

  
 12 

	 	
the financial statements, and (B) may appropriately adjust any measurement of performance under a Qualifying Performance Criteria to exclude the effects of any of the following events that
occurs during a performance period: (1) asset write-downs, (2) litigation, claims, judgments or settlements, (3) changes in tax law or other such laws or provisions affecting reported results, (4) reorganization and restructuring
programs and (5) payments made or due under this Plan or any other compensation arrangement maintained by the Company. 

  

	 	(c)	 Restrictions. The Committee shall have the power to impose such other restrictions on Awards subject to
this Paragraph as it may deem necessary or appropriate to ensure that such Awards satisfy all requirements for “performance-based compensation” within the meaning of Section 162(m). 

 

	 	(d)	 Limitations on Grants to Individual Participants. In no event may Awards that are denominated in shares
and that are intended to be “performance-based compensation” under Section 162(m) be granted or awarded to any Employee covering more than 1,000,000 shares in the aggregate (taking into account all such share-based Awards) in any one
calendar year, subject to the adjustment provisions of Paragraph 13 of the Plan only to the extent that such adjustment will not affect the status of any Award intended to qualify as “performance-based compensation” under
Section 162(m). During any calendar year no Participant may be granted Performance Awards that are intended to comply with the performance-based exception under Section 162(m) and are denominated in cash under which more than $5,000,000
may be earned for each 12 months in the performance period. If an Award is cancelled, the cancelled Award shall continue to be counted toward the applicable limitation in this Paragraph. 

 

	11.	 Termination of Employment and Change in Control. 

Schedule A and Schedule B, attached hereto, establish the effects of a Participant’s termination of employment, other changes of
employment or employer status, and a Change in Control, with respect to outstanding Options, SARs, Restricted Stock, and Restricted Stock Units, and such Schedules are hereby incorporated by reference. The Committee may approve Awards containing
terms and conditions different from, or in addition to, those set forth in Schedule A and Schedule B. The effects of a termination of employment and/or a Change in Control with respect to Incentive Bonuses shall be set forth in the applicable Award
Agreement. In the case of leaves of absence, Employees will not be deemed to have terminated employment unless the Committee, in its sole discretion, determines otherwise. 
  

	12.	 Transferability of Awards. 

Except as otherwise provided by the Committee: 
  

	 	(a)	 Awards shall not be transferable other than by will or by the laws of descent and distribution. The rights of a
Participant under this Plan shall not be assignable or transferable pursuant to a qualified domestic relations order as defined in the Code or Title I of the Employee Retirement Income Security Act or the rules thereunder. 

  
 13 

	 	(b)	 During the lifetime of a Participant, an Option shall be exercisable only by the recipient of such Option, or
by his/her legal representative. 

  

	13.	 Adjustments. 

In the event of any merger, reorganization, consolidation, combination of shares or spin-offs, recapitalization, dividend or distribution
(whether in cash, shares or other property, other than a regular cash dividend), stock split, reverse stock split, or other change in corporate structure affecting the Shares or the value thereof or otherwise, the Committee or the Board of Directors
shall make such adjustment and other substitutions, if any, as it may deem equitable and appropriate, including such adjustments in the number, class and kind of securities that may be delivered under the Plan, the number of Shares subject to any
outstanding Award and the Option or exercise price, if any, thereof. Any such adjustment may provide for the elimination of any fractional Shares that might otherwise become subject to any Award without payment therefore. 

 

	14.	 Amendments and Modifications of the Plan. 

The Board of Directors may, from time to time, alter, amend, suspend or terminate the Plan as it shall deem advisable, subject to any
requirement for shareholder approval imposed by applicable law, including the rules and regulations of the principal U.S. national securities exchange on which the Shares are traded; provided that the Board of Directors may not amend the Plan in any
manner that would result in noncompliance with Rule 16b-3 under the 1934 Act; and further provided that the Board of Directors may not, without the approval of the Company’s shareholders to the extent
required by such applicable law, amend the Plan to: (a) increase the number of Shares that may be the subject of Awards under the Plan (exept for adjustments pursuant to Paragraph 13); (b) expand the types of awards available under the Plan;
(c) materially expand the class of persons eligible to participate in the Plan; (d) amend the Plan to eliminate the requirements relating to minimum exercise price, minimum grant price and shareholder approval; (e) increase the
maximum permissible term of any Option or the maximum permissible term of SAR; or (f) increase any of the limitations in Paragraph 10(d). The Board of Directors may not (except pursuant to Paragraph 13 or in connection with a Change in
Control), without the approval of the Company’s shareholders, cancel an Option or SAR in exchange for cash when the exercise or grant price per share exceeds the Fair Market Value of one Share or take any action with respect to an Option or SAR
that would be treated as a repricing under the rules and regulations of the principal securities exchange on which the Shares are traded, including a reduction of the exercise price of an Option or the grant price of a SAR or the exchange of an
Option or SAR for another Award. In addition, except as permitted by Section 24 or as otherwise expressly authorized under the Plan, no amendments to, or termination of, the Plan shall impair the rights of a Participant in any material respect
under any Award previously granted without such Participant’s consent. 

  
 14 

	15.	 Tax Withholding. 

The Company shall have the right to make all payments or distributions pursuant to the Plan to a Participant (or a legal representative
thereof as provided in an Award Agreement) net of any applicable federal, state and local taxes required to be paid or withheld as a result of (a) the grant of any Award; (b) the exercise of an Option or SAR; (c) the delivery of
Shares or cash; (d) the lapse of any restrictions in connection with any Award; or (e) any otherevent occurring pursuant to the Plan. The Company or any Majority-Owned Related Company shall have the right to withhold from wages or other
amounts otherwise payable to a Participant (or a legal representative thereof as provided in an Award Agreement) such withholding taxes as may be required by law, or to otherwise require the Participant (or legal representative) to pay such
withholding taxes. The Company may, at its discretion, delay the delivery of Shares or cash otherwise deliverable to a Participant in connection with the settlement of an Award until such time arrangements have been made to ensure the remittance of
all taxes due from the Participant in connection with the Award. If the Participant (or legal representative) shall fail to make such tax payments as are required, the Company or its Majority-Owned Related Company shall, to the extent permitted by
law, have the right to deduct any such taxes from any payment of any kind otherwise due to such Participant (or legal representative) or to take such other action as may be necessary to satisfy such withholding obligations. The Committee shall be
authorized to establish procedures for election by Participants (or legal representative) to satisfy such obligation for the payment of such taxes by tendering previously acquired Shares (either actually or by attestation, valued at their then Fair
Market Value), or by directing the Company to retain Shares (up to the minimum required tax withholding rate for the Participant) or such other rate that will not cause an adverse accounting consequence or cost) otherwise deliverable in connection
with the Award. 
  

	16.	 Right of Discharge Reserved; Claims to Awards. 

Nothing in the Plan nor the grant of an Award hereunder shall confer upon any Participant the right to continue in the employment of the
Company or any Related Company or affect any right that the Company or any Related Company may have to terminate the employment of (or to demote or to exclude from future Awards under the Plan) any such Participant at any time for any reason. In the
event of a Participant’s termination of employment with the Company or Related Company, neither the Company nor any Related Company shall be liable for the loss of existing or potential profit from any Award held by a Participant immediately
preceding the Participant’s termination. No Participant shall have any claim to be granted any Award under the Plan, and there is no obligation for uniformity of treatment of Participants under the Plan. 

 

	17.	 Stop Transfer Orders. 

All certificates for Shares delivered under the Plan pursuant to any Award shall be subject to such stop-transfer orders and other
restrictions as the Committee may deem advisable under the rules, regulations and other requirements of the United States Securities and Exchange Commission, any stock exchange upon which the Shares are then listed, and any applicable federal or
state securities law, and the Committee may cause a legend or legends to be put on any such certificates to make appropriate reference to such restrictions. 

  
 15 

	18.	 Severability. 

The provisions of the Plan shall be deemed severable. If any provision of the Plan shall be held unlawful or otherwise invalid or
unenforceable in whole or in part by a court of competent jurisdiction or by reason of change in a law or regulation, such provision shall (a) be deemed limited to the extent that such court of competent jurisdiction deems it lawful, valid
and/or enforceable and as so limited shall remain in full force and effect; and (b) not affect any other provision of the Plan or part thereof, each of which shall remain in full force and effect. 

 

	19.	 Construction. 

As used in the Plan, the words “include” and “including,” and variations thereof, shall not be deemed to be
terms of limitation, but rather shall be deemed to be followed by the words “without limitation.” 
  

	20.	 Unfunded Status of the Plan. 

The Plan is intended to constitute an “unfunded” plan for incentive compensation. With respect to any payments not yet made to a
Participant by the Company, nothing contained herein shall give any such Participant any rights that are greater than those of a general creditor of the Company. In its sole discretion, the Committee may authorize the creation of trusts or other
arrangements to meet the obligations created under the Plan to deliver the Shares or payments in lieu of or with respect to Awards hereunder; provided, however, that the existence of such trusts or other arrangements is consistent with the unfunded
status of the Plan. 
  

	21.	 Non-U.S. Employees. 

The Committee may determine, in its sole discretion, whether it is desirable or feasible under local law, custom or practice to grant Awards
to Participants in countries other than the United States. In order to facilitate any such grants, the Committee may provide for such modifications and additional terms and conditions (“special terms”) in the grant and Award Agreements to
Participants who are employed outside the United States (or who are foreign nationals temporarily within the United States) as the Committee may consider necessary, appropriate or desirable to accommodate differences in, or otherwise comply with,
local law, policy or custom or to facilitate administration of the Plan. The Committee may adopt or approve sub-plans, appendices or supplements to, or amendments, restatements or alternative versions of, the
Plan as it may consider necessary, appropriate or desirable for purposes of implementing any special terms or facilitating the grant, without thereby affecting the terms of the Plan as in effect for any other purpose. The special terms and any
appendices, supplements, amendments, restatements or alternative versions, however, shall not include any provisions that are inconsistent with the terms of the Plan as then in effect, unless the Plan could have been amended to eliminate such
inconsistency without further approval by the Board of Directors. 
  

	22.	 Governing Law. 

The Plan shall be governed by and shall be construed and enforced in accordance with the laws of the State of Delaware without giving effect
to its choice of law rules. 

  
 16 

	23.	 Termination of the Plan. 

Awards may be granted under the Plan at any time and from time to time on or prior to November 15, 2022, on which date the Plan will
terminate except as to Awards then outstanding under the Plan. 
  

	24.	 Section 409A. 

This Plan is intended to comply and shall be administered in a manner that is intended to comply with Section 409A and shall be construed
and interpreted in accordance with such intent. To the extent that an Award or the payment, settlement or deferral thereof is subject to Section 409A, the Award shall be granted, paid, settled or deferred in a manner that will comply with
Section 409A, including regulations or other guidance issued with respect thereto, except as otherwise determined by the Committee. Any provision of this Plan that would cause the grant of an Award or the payment, settlement or deferral thereof
to fail to satisfy Section 409A shall be amended to comply with Section 409A on a timely basis, which may be made on a retroactive basis, in accordance with regulations and other guidance issued under Section 409A. 

Notwithstanding anything to the contrary contained herein, the Company and the Related Companies and their officers, directors, employees and
service providers (other than Participants with respect to their own Awards or the payment, settlement or deferral thereof) shall have no liability for adverse consequences under Section 409A. 

  
 17 

 SCHEDULE A 

TO THE 
 JACOBS SOLUTIONS
INC. 
 1999 Stock Incentive Plan, as Amended and Restated 

Treatment of Options and SARs 
  

					
	 Event
	  	 Impact on Vesting
	  	 Impact on Exercise Period

	Employment terminates due to Retirement	  	Unvested Options and SARs are forfeited	  	Expiration date provided in the Award Agreement continues to apply
			
	Employment terminates due to Disability or death	  	All Options and SARs become immediately vested	  	Expiration date provided in the Award Agreement continues to apply
			
	Employment terminates in a Qualifying Termination within two years following a Change in Control	  	All Options and SARs become immediately vested	  	Expire on the earlier to occur of (1) the expiration date provided in the Award Agreement, or (2) two years from the date of termination
			
	Employment terminates for reasons other than a Change in Control, Disability, Retirement, or death (for purposes of this section, the receipt of severance pay or similar compensation by the Award recipient does not extend his or her
termination date)	  	Unvested Options and SARs are forfeited	  	Expires on the earlier to occur of (1) the expiration date in the Award Agreement, or (2) three months from the date of termination
			
	Participant is an employee of a Related Company, and the Company’s investment in the Related Company falls below 20% (this constitutes a termination of employment under the Plan)	  	Unvested Options and SARs are forfeited	  	Expires on the earlier to occur of (1) the expiration date provide in the Award Agreement, or (2) three months from the date of termination
			
	Employee becomes an employee of an entity in which the Company’s ownership interest is less than 20% (this constitutes a termination of employment under the Plan)	  	Unvested Options and SARs are forfeited	  	Expires on the earlier to occur of (1) the expiration date provided in the Award Agreement, or (2) three months from the date of termination

  
 18 

					
	 Event
	  	 Impact on Vesting
	  	 Impact on Exercise Period

	Employment transferred to a Related Company	  	Vesting continues after transfer	  	Expiration date provided in the Award Agreement continues to apply
			
	Death after termination of employment but before Option/SAR has expired	  	Not applicable	  	Right of executor or administrator of estate (or other transferee permitted under Plan or Award Agreement) terminates on the earlier to occur of (1) the expiration date provided in the Award Agreement, or (2) the
expiration date that applied immediately prior to the death
			
	A Change in Control occurs and Options and/or SARs are not assumed and continued by the acquiring or surviving corporation in the transaction (or a parent corporation thereof)	  	All Options and SARs become immediately vested	  	Expires on the date of the Change in Control; provided that the Employee is given at least 15 days’ notice of such termination and the opportunity to exercise outstanding Options during such notice period.

  
 19 

 SCHEDULE B 

to the 
 JACOBS SOLUTIONS
INC. 
 1999 Stock Incentive Plan, as Amended and Restated 

Treatment of Restricted Stock and Restricted Stock Units 

 

			
	 Event
	  	 Impact on Vesting

	Employee’s employment terminates due to Retirement	  	Unvested Restricted Stock and Restricted Stock Units are forfeited upon Retirement
		
	Employee’s employment terminates due to Disability or death	  	The restrictions on all unvested Restricted Stock shall immediately lapse and unvested Restricted Stock Units become immediately vested; provided, however, that any awards of Restricted Stock and/or Restricted Stock Units that are
subject to performance-based vesting criteria shall remain outstanding and continue to vest or become earned based upon the Company’s actual performance through the end of the applicable performance period
		
	Employment terminates in a Qualifying Termination within two years following a Change in Control	  	The restrictions on all unvested Restricted Stock shall immediately lapse and unvested. Restricted Stock Units become immediately vested; provided, however, that any awards of Restricted Stock and/or Restricted Stock Units that are
subject to performance-based vesting criteria shall be paid at a level based upon the Company’s actual performance as of the applicable Qualifying Termination.
		
	Employee’s employment terminates for reasons other than a Change in Control, forfeited Disability, Retirement or death (for purposes of this section, the receipt of severance pay or similar compensation by the Employee does not
extend his or her termination date)	  	Unvested Restricted Stock and Restricted Stock Units are forfeited

  
 20 

			
	 Event
	  	 Impact on Vesting

	Employee is an employee of a Related Company, and the Company’s investment in the Related Company falls below 20% (this constitutes a termination of employment under the Plan effective as of the date the Company’s
investment in the Related Company falls below 20%)	  	Unvested Restricted Stock and Restricted Stock Units are forfeited
		
	Employee becomes an employee of an entity in which the Company’s ownership interest is less than 20% (this constitutes a termination of employment under the Plan effective as of the date the Employee becomes an employee of the
entity in which the Company’s ownership interest is less than 20%)	  	Unvested Restricted Stock and Restricted Stock Units are forfeited
		
	Employment transferred to a Related Company	  	The restrictions on unvested Restricted Stock shall continue to lapse and Restricted Stock Units continue to vest after the transfer, subject to the Company’s actual performance with respect to any applicable performance-based
vesting criteria
		
	A Change in Control occurs and Unvested Restricted Stock and Restricted Stock Units are not assumed and continued by the acquiring or surviving corporation in the transaction (or a parent corporation thereof)	  	The restrictions on all unvested Restricted Stock shall immediately lapse and unvested Restricted Stock Units become immediately vested; provided, however, that any awards of Restricted Stock and/or Restricted Stock Units that are
subject to performance-based vesting criteria shall be paid at a level based upon the Company’s actual performance as of the applicable Change in Control.

  
 21EX-4.3

 Exhibit 4.3 

JACOBS SOLUTIONS INC. 

1989 EMPLOYEE STOCK PURCHASE PLAN 

(As amended and restated on August 29, 2022) 

1. Purpose. The purpose of the Plan is to provide employees of the Company and its Designated Subsidiaries and Designated Affiliates with an
opportunity to purchase Shares of the Company. This Plan includes two components: a Code Section 423 Component (the “423 Component”) and a non-Code Section 423 Component (the
“Non-423 Component”). It is the intention of the Company to have the 423 Component qualify as an “employee stock purchase plan” under Section 423 of the Code. The provisions of
the 423 Component, accordingly, shall be construed so as to extend and limit participation in a uniform and nondiscriminatory basis consistent with the requirements of Section 423 of the Code. In addition, this Plan authorizes the grant of
purchase rights under the Non-423 Component that does not qualify as an “employee stock purchase plan” under Section 423 of the Code; such purchase rights shall be granted pursuant to rules,
procedures or subplans adopted by the Committee designed to achieve tax, securities laws or other objectives for Eligible Employees and the Company. Except as otherwise provided herein, the Non-423 Component
will be operated and administered in the same manner as the 423 Component. 
 2. Definitions. 

(a) “Administrator” means the Company’s highest ranking Human Resources Officer or one or more of the Company’s
other officers or management team appointed by the Board or Committee to administer the day-to-day operations of the Plan. Except as otherwise provided in the Plan, the
Board or Committee may assign any of its administrative tasks to the Administrator. 
 (b) “Affiliate” means (a) any
entity that, directly or indirectly, is controlled by, controls or is under common control with, the Company and (b) any entity in which the Company has a significant equity interest, in either case as determined by the Committee, whether now
or hereafter existing. 
 (c) “Board” means the Board of Directors of the Company. 

(d) “Change in Control” means, with respect to the Company, a change in control of a nature that would be required to be
reported in response to Item 6(e) of Schedule 14A of Regulation 14A under the Exchange Act, provided that such a change in control shall be deemed to have occurred at such time as (i) any “person” (as that term is used in Sections
13(d) and 14(d)(2) of the Exchange Act) is or becomes the “beneficial owner” (as defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of securities representing 35% or more of the
combined voting power for election of Directors of the then outstanding securities of the Company or any successor of the Company; (ii) during any period of two (2) consecutive years or less, individuals who at the beginning of such period
constituted the Board cease, for any reason, to constitute at least a majority of the Board, unless the election or nomination for election of each new Director was approved by a vote of at least two-thirds of
the Directors then still in office who were Directors at the beginning of the period; (iii) the consummation of any 

 
merger or consolidation as a result of which the Shares shall be changed, converted or exchanged (other than by merger with a wholly owned subsidiary of the Company) or any liquidation of the
Company or any sale or other disposition of 50% or more of the assets or earning power of the Company; or (iv) the consummation of any merger or consolidation to which the Company is a party as a result of which the persons who were
shareholders of the Company immediately prior to the effective date of the merger or consolidation shall have beneficial ownership of less than 50% of the combined voting power for election of directors of the surviving corporation following the
effective date of such merger or consolidation; provided, however, that no Change in Control shall be deemed to have occurred if, prior to such time as a Change in Control would otherwise be deemed to have occurred, the Board
determines otherwise. 
 (e) “Code” means the U.S. Internal Revenue Code of 1986, as amended from time to time, or any
successor statute thereto, and the regulations promulgated thereunder. 
 (f) “Committee” means the Human
Resource & Compensation Committee of the Board or another committee designated by the Board, or the person(s) or entity delegated the responsibility of administering the Plan. 

(g) “Company” means Jacobs Solutions Inc., including any successor thereto. 

(h) “Compensation” means wages and salary but exclusive of overtime pay and regularly paid wage premiums (such as evening or
shift premiums), commissions, income from equity compensation awards, bonuses, contributions to other plans, and other compensation, unless otherwise determined by the Administrator. The Committee shall have the discretion to determine the
application of this definition to employees outside the United States. 
 (i) “Designated Affiliate” means any Affiliate
selected by the Administrator as eligible to participate in the Non-423 Component. 
 (j)
“Designated Subsidiary” means any Subsidiary selected by the Administrator as eligible to participate in the 423 Component. 

(k) “Disability” means the Participant becoming unable to engage in any substantial gainful activity by reason of any medical
determinable physical or mental impairment that can be expected to result in death or that has lasted or can be expected to last for a continuous period of not less than 12 months, within the meaning of Code Section 422(c)(6). 

(l) “Director” means a member of the Board. 

(m) “Effective Date” shall mean the date the Plan becomes effective in accordance with Section 25. 

(n) “Eligible Employee” means (i) any individual who is treated as an active employee in the records of the Company or
any Designated Subsidiary or (ii) any individual who is treated as an active employee in the records of the Company or any Designated Affiliate, in each case regardless of any subsequent reclassification by the Company or by any Designated
Subsidiary or Designated Affiliate, any governmental agency, or any court; provided, however, in all cases, only following the completion of one year of service as an active employee of the

  
 2 

 
Company, Designated Subsidiary, or Designated Affiliate. The Administrator, in its discretion, from time to time may, prior to an Offering Date for a particular Offering and for all purchase
rights to be granted on such Offering Date under such Offering, determine that the definition of Eligible Employee will or will not include an individual if he or she customarily works not more than twenty (20) hours per week or not more than
five (5) months in any calendar year (or, in each case, such lesser period of time as may be determined by the Administrator in its discretion), provided that any such exclusion is applied with respect to each Offering in a uniform manner to
all similarly-situated employees who otherwise would be Eligible Employees for that Offering. The Administrator, in its discretion, may further modify this definition as applied to the Non-423 Component. For
purposes of the 423 Component, the employment relationship shall be treated as continuing intact while the individual is on military or sick leave or other bona fide leave of absence approved by the Company or the Designated Subsidiary so long as
the leave does not exceed three (3) months or if longer than three (3) months, the individual’s right to reemployment is provided by statute or has been agreed to by contract or in a written policy of the Company which provides for a
right of reemployment following the leave of absence. The employment relationship shall be treated as continuing intact where an Eligible Employee transfers employment between the Company, Designated Subsidiaries and/or Designated Affiliates;
provided, however, that an individual who is not employed by the Company or a Designated Subsidiary on the Offering Date and through a date that is no more than three (3) months prior to the Purchase Date will participate only in
the Non-423 Component unless the individual continues to have a right to reemployment with the Company or a Designated Subsidiary provided by statute or contract or in a written policy of the Company which
provides for a right of reemployment following the leave of absence. The Administrator shall establish rules to govern other transfers into the 423 Component, and between any separate Offerings established thereunder, consistent with the applicable
requirements of Section 423 of the Code. 
 (o) “Employer” means, individually and collectively, the Company, a
Designated Affiliate and the Designated Affiliates, a Designated Subsidiary and the Designated Subsidiaries. 
 (p) “Exchange
Act” means the U.S. Securities Exchange Act of 1934, as amended, from time to time, or any successor law thereto, and the regulations promulgated thereunder. 

(q) “Fair Market Value” means, with respect to the Shares, as of any date, (i) the closing per-share sales price of the Shares (A) as reported by the NYSE composite tape for such date or (B) if the Shares are no longer listed on the NYSE but are listed on any other national stock exchange or
national market system, as reported on the stock exchange composite tape for securities traded on such exchange for such date, or, with respect to each of clauses (A) and (B), if there were no sales on such date, on the closest preceding date
on which there were sales of Shares, or, (ii) in the event there shall be no public market for the Shares on such date, the fair market value of the Shares as determined in good faith by the Committee upon the reasonable application of a
reasonable valuation method. 
 (r) “NYSE” means the New York Stock Exchange. 

  
 3 

 (s) “Offering” means an offer under the Plan of a purchase right that may
be exercised during an Offering Period as further described in Section 2(t). For purposes of this Plan, the Committee may designate separate Offerings under the Plan (the terms of which need not be identical) in which Eligible Employees of one
or more Designated Subsidiaries or Designated Affiliates will participate, even if the dates of the applicable Offering Periods of each such Offering are identical. 

(t) “Offering Date” means the first Trading Day of each Offering Period. 

(u) “Offering Period” means a period of six months during which a purchase right granted pursuant to the Plan may be offered,
or such different period for the offer of the purchase right as may be established by the Committee. In no event shall an Offering Period exceed 27 months. The duration and timing of Offering Periods may be changed pursuant to Section 4. 

(v) “Parent” means a “parent corporation” of the Company whether now or hereinafter existing as defined in
Section 424(e) of the Code. 
 (w) “Participant” means any Eligible Employee who participates in the Plan as described
in Section 5. 
 (x) “Payroll Deduction Authorization Form” means any written agreement, enrollment form, contract or
other instrument or document (in each case in paper or electronic form) evidencing that an Eligible Employee has elected to become a Participant in the Plan, which may, but need not, require execution by a Participant. 

(y) “Plan” means the Jacobs Solutions Inc. 1989 Employee Stock Purchase Plan (as Amended and Restated on August 29,
2022) (formerly known as the Jacobs Engineering Group Inc. 1989 Employee Stock Purchase Plan (as Amended and Restated on January 19, 2017)), including both the 423 Component and the Non-423
Component. This Plan was renamed and amended and restated on August 29, 2022 solely to reflect the Company’s reorganization on August 29, 2022. 

(z) “Purchase Date” means the last Trading Day of each month during the Offering Period. 

(aa) “Purchase Price” means a per-Share amount to be paid by a Participant to
purchase a Share during the Offering Period. Such Purchase Price shall be established in the manner specified by the Committee and in effect thereafter unless otherwise changed by the Committee, for each Offering prior to an Offering Period, shall
be ninety-five percent (95%) of the Fair Market Value of a Share on the relevant Purchase Date. Such Purchase Price may be established by the Committee by any manner or method the Committee determines, pursuant to Section 16, and subject to
(i) with respect to the 423 Component, compliance with Section 423 of the Code (or any successor rule or provision or any other applicable law, regulation or stock exchange rule) or (ii) with respect to the Non-423 Component, pursuant to such manner or method as determined by the Committee to comply with applicable local law. 

(bb) “Share” means a share of common stock of the Company, par value $1.00 per share, or such other security of the Company
(i) into which such share shall be changed by reason of a recapitalization, merger, consolidation, split-up, combination, exchange of shares or other similar transaction or (ii) as may be determined
by the Committee pursuant to Section 16. 

  
 4 

 (cc) “Subsidiary” means a “subsidiary corporation” of the Company
whether now or hereafter existing, as defined in Section 424(f) of the Code. 
 (dd) “Trading Day” means a day on
which the NYSE is open for trading. 
 3. Eligibility. Any Eligible Employee on a given Offering Date shall be eligible to participate in the
Plan, provided, however, that employees who are citizens or residents of a non-U.S. jurisdiction may be excluded from participation in the Plan or an Offering if the participation of such
Employees is prohibited under the laws of the applicable jurisdiction or if complying with the laws of the applicable jurisdiction would cause the Plan or an Offering to violate Section 423 of the Code. Further, notwithstanding any provisions
of the Plan to the contrary, no Eligible Employee may be granted a purchase right under the 423 Component of the Plan (i) to the extent that, immediately after the grant, such Eligible Employee (or any other person whose stock would be
attributed to such Eligible Employee pursuant to Section 424(d) of the Code) would own capital stock of the Company and/or hold outstanding purchase rights to purchase capital stock possessing five percent (5%) or more of the total combined
voting power or value of all classes of the capital stock of the Company or of any Subsidiary, or (ii) to the extent that his or her rights to purchase capital stock under all employee stock purchase plans of the Company and its subsidiaries
accrues at a rate that exceeds Twenty-Five Thousand Dollars (US$25,000) worth of such stock (determined at the Fair Market Value of the shares of such stock at the time such purchase right is granted) for each calendar year in which such purchase
right is both outstanding and exercisable. 
 4. Offering Periods. The Plan shall be implemented by consecutive
six-month Offering Periods with a new Offering Period commencing on the first Trading Day in January and July or on such other date as the Committee shall determine, and continuing thereafter to the last
Trading Day of the respective six-month period or until terminated in accordance with Section 20. Within the limitations set forth in Section 2(t), the Committee shall have the power to change the
duration of Offering Periods (including the commencement dates thereof) with respect to future offerings without stockholder approval if such change is announced prior to the scheduled beginning of the first Offering Period to be affected
thereafter. 
 5. Participation. An Eligible Employee may become a Participant in the Plan by completing, within any prescribed enrollment period
prior to the applicable Offering Date, a Payroll Deduction Authorization Form (electronic or otherwise) and/or any other forms and following any procedures for enrollment in the Plan as may be established by the Administrator from time to time. 

6. Payroll Deductions or Contributions. 

(a) At the time a Participant completes any Payroll Deduction Authorization Form, enrollment form and/or procedure to enroll in the Plan, as
provided in Section 5, he or she shall elect to have payroll deductions made on each pay day during the Offering Period in an amount not exceeding 15% of the Compensation that he or she receives on each pay day during the Offering Period,
provided, that should a pay day occur on a Purchase Date, a Participant shall have the payroll deductions made on such day applied to his or her account under the new Offering Period, unless otherwise provided by the Administrator and subject
to withdrawal by 

  
 5 

 
the Participant as provided in Section 10. The Administrator may permit Eligible Employees participating in a specified Offering to contribute amounts to the Plan through payment by cash,
check or other means to comply with non-U.S. requirements, provided, that such contributions shall not exceed 15% of the Compensation received each pay period, during the Offering Period. A
Participant’s enrollment in the Plan shall remain in effect for successive Offering Periods unless terminated as provided in Section 10. 

(b) Payroll deductions or contributions, as applicable, for a Participant shall commence on the first pay day following the Offering Date and
shall end on the last pay day in the Offering Period to which such authorization is applicable (subject to subsection 6(a)), unless sooner terminated by the Participant as provided in Section 10. 

(c) A Participant may discontinue his or her participation in the Plan as provided in Section 10 by completing any forms and following
any procedures for withdrawal from the Plan as may be established by the Administrator from time to time. Further, the Participant may increase or decrease payroll deductions or contributions by completing any form or following any procedure
established by the Administrator from time to time. 
 (d) At the time that Shares are purchased under the Plan, or at the time some or all
of the Company’s Shares issued under the Plan are disposed of, the Participant must make adequate provision for the Company’s or its Subsidiary’s or Affiliate’s federal, state, or any other tax liability payable to any authority,
national insurance, social security, payment-on-account or other tax obligations, if any, which arise as a result of participation in the Plan, including, for the
avoidance of doubt, any liability of the Participant to pay an employer tax or social insurance contribution obligation, which liability has been shifted to the Participant as a matter of law or contract. At any time, the Company or its Subsidiary
or Affiliate, as applicable, may, but shall not be obligated to, withhold from the Participant’s compensation the amount necessary for the Company or its Subsidiary or Affiliate, as applicable, to meet applicable withholding obligations,
including any withholding required to make available to the Company or its Subsidiary or Affiliate, as applicable, any tax deductions or benefits attributable to sale or early disposition of Shares by the Eligible Employee. In addition, the Company
or its Subsidiary or Affiliate, as applicable, (i) may withhold from the proceeds of the sale of Shares, (ii) may withhold a sufficient whole number of Shares otherwise issuable following purchase having an aggregate fair market value
sufficient to pay applicable withholding obligations, or (iii) may withhold by any other means set forth in the applicable Payroll Deduction Authorization Form. Where necessary to avoid negative accounting treatment, the Company or its
Subsidiary or Affiliate shall not withhold taxes in excess of the applicable maximum marginal tax rates. 
 7. Grant of Purchase Right. On the
Offering Date of each Offering Period, each Eligible Employee participating in such Offering Period shall be granted a right to purchase on each Purchase Date during such Offering Period (at the applicable Purchase Price) up to a number of Shares
determined by dividing such Eligible Employee’s payroll deductions or contributions accumulated prior to such Purchase Date by the applicable Purchase Price; provided, however, that in no event shall an Eligible Employee be
permitted to purchase during each Offering Period more than 2,400 Shares subject to adjustment pursuant to Section 15, and provided further that such purchase shall be subject to the limitations set forth in Sections 3 and 14. The Committee
may, for future Offering Periods, increase or decrease, in its discretion, the maximum number of Shares that an Eligible Employee may purchase during each Offering Period. The purchase of Shares pursuant to the purchase right shall occur as provided
in Section 8, unless the Participant has withdrawn pursuant to Section 10. Each purchase right expires following the applicable Purchase Date. 

  
 6 

 8. Purchase of Shares. 

(a) Unless a Participant withdraws from the Plan as provided in Section 10, on the Purchase Date, the maximum number of Shares, including
fractional shares, as may be purchased with the accumulated payroll deductions or contributions in the Participant’s account shall be purchased for such Participant at the applicable Purchase Price, subject to the limitations in Section 7
and Section 8(b). Unless specifically permitted by the Committee, fractional shares shall not be purchased under the Plan. In the absence of such permission by the Committee, any payroll deductions or contributions accumulated in a
Participant’s account which are not sufficient to purchase a full Share shall, at the discretion of the Committee, be returned to the Participant or be retained in the Participant’s account for the subsequent Offering Period, subject to
earlier withdrawal by the Participant as provided in Section 10. During a Participant’s lifetime, Shares may be purchased pursuant to the Participant’s purchase right only by the Participant. 

(b) No Participant in the 423 Component of the Plan is permitted to purchase shares under all employee stock purchase plans of the Company and
its subsidiaries at a rate that exceeds $25,000 in Fair Market Value (determined at the time the purchase right is granted) for each calendar year in which any stock purchase right is both outstanding and exercisable. 

(c) If the Company determines that, on a given Purchase Date, the number of Shares with respect to which purchase rights are to be exercised
may exceed (i) the number of Shares that were available for sale under the Plan on the Offering Date of the applicable Offering Period, or (ii) the number of Shares available for sale under the Plan on such Purchase Date, the Company shall
make a pro-rata allocation of the Shares available for purchase on such Purchase Date in as uniform a manner as shall be practicable to be equitable among all Participants exercising purchase rights on such
Purchase Date. The Company may make a pro-rata allocation of the Shares available on the Offering Date of any applicable Offering Period pursuant to the preceding sentence, notwithstanding any authorization of
additional Shares for issuance under the Plan by the Company’s shareholders subsequent to such Offering Date. In such event, any residual payroll deductions or contributions accumulated in a Participant’s account which are not used to
purchase Shares shall be promptly refunded to the relevant Participant or beneficiary, as applicable. 
 9. Delivery. By enrolling and participating
in the Plan, each Participant shall be deemed to have authorized the establishment of a brokerage account on his or her behalf at a securities brokerage firm selected by the Company. Alternatively, the Company may provide for Plan share accounts for
each Participant to be established by the Company or by an outside entity selected by the Committee which is not a brokerage firm. As soon as reasonably practicable after each Purchase Date on which a purchase of Shares occurs, the Company shall
arrange for the delivery to each Participant of the Shares purchased upon exercise of his or her purchase right to the Participant’s brokerage or Plan share account in a form determined by the Company. Notwithstanding any other provision of the
Plan, unless otherwise determined by the 

  
 7 

 
Administrator or required by any applicable law, rule or regulation, the Company shall not deliver to any Participant certificates evidencing Shares issued in connection with any purchase under
the Plan, and instead such Shares shall be recorded in the books of the brokerage firm or, as applicable, the Company, its transfer agent, stock plan administrator or such other outside entity which is not a brokerage firm. 

10. Withdrawal. 
 (a) A Participant may
decide not to purchase Shares on a given Purchase Date and opt to withdraw all, but not less than all, the payroll deductions or contributions credited to his or her account and not yet used to purchase Shares under the Plan at any time by giving
notice in a form or manner prescribed by the Administrator from time to time, except that no withdrawals shall be permitted for the ten (10) day period immediately preceding each Purchase Date, or other time period specified by the
Administrator in its discretion. All of the Participant’s payroll deductions or contributions credited to his or her account shall, at the discretion of the Administrator, (i) be retained in Participant’s account and used to purchase
Shares at the next Purchase Date, or (ii) be paid to such Participant as soon as reasonably practicable after receipt of notice of withdrawal and such Participant’s purchase right for the Offering Period shall be terminated automatically,
and no further payroll deductions or contributions for the purchase of Shares shall be made for such Offering Period. If a Participant withdraws from an Offering Period, payroll deductions or contributions shall not resume at the beginning of the
succeeding Offering Period unless he or she satisfactorily completes the process to re-enroll in the Plan as prescribed by the Administrator from time to time. 

(b) A Participant’s withdrawal from an Offering Period shall not have any effect upon his or her eligibility to participate in any
similar plan that may hereafter be adopted by the Company or in succeeding Offerings which commence after the termination of the Offering Period from which he or she has withdrawn. 

11. No Right to Employment. Participation in the Plan by a Participant shall not be construed as giving a Participant the right to be retained as an
employee of the Company, a Subsidiary, or an Affiliate, as applicable. Furthermore, the Company, a Subsidiary, or an Affiliate may dismiss a Participant from employment at any time, free from any liability or any claim under the Plan. 

12. Termination of Employment. Unless otherwise determined by the Administrator, upon a Participant’s ceasing to be an Eligible Employee, due to
termination of employment for any reason (other than death or Disability), he or she shall be deemed to have elected to withdraw from the Plan and the payroll deductions or contributions credited to such Participant’s account during the
Offering Period but not yet used to purchase Shares under the Plan shall be returned to such Participant and such Participant’s purchase right shall be terminated automatically. Unless otherwise determined by the Administrator, upon a
Participant’s ceasing to be an Eligible Employee, due to termination of employment on account of death or Disability, the Participant or, in the case of his or her death, the person or persons entitled thereto under Section 17 may
elect to (i) purchase Shares on the next applicable Purchase Date, as may be purchased with the accumulated payroll deductions or contributions in the Participant’s account in accordance with the terms of the Plan and Section 8 or,
(ii) elect to withdraw from the Plan as described in this Section 12. 

  
 8 

 13. Interest. No interest will accrue on the contributions of a Participant in the Plan, except as
may be required by applicable law, as determined by the Administrator. 
 14. Shares Available for Purchase under the Plan. 

(a) Basic Limitation. Subject to adjustment pursuant to Section 15, the aggregate number of Shares authorized for sale under the
Plan is 30,977,108 Shares. The limitation set forth in this section may be used to satisfy purchases of Shares under either the 423 Component or the Non-423 Component. 

(b) Rights as an Unsecured Creditor. Until the Shares are issued (as evidenced by the appropriate entry on the books of the Company or
of a duly-authorized transfer agent or broker selected by the Company), a Participant shall only have the rights of an unsecured creditor with respect to such Shares, and no right to vote or receive dividends or any other rights as a stockholder
shall exist with respect to such Shares. 
 (c) Sources of Shares Deliverable at Purchase. Any Shares issued after purchase may
consist, in whole or in part, of authorized and unissued Shares or of treasury Shares. 
 15. Adjustments for Changes in Capitalization and Similar
Events. 
 (a) Changes in Capitalization. Subject to any required action by the shareholders of the Company, the maximum number
of Shares that shall be made available for sale under the Plan, the maximum number of Shares that each Participant may purchase during the Offering Period (pursuant to Section 7) or over a calendar year under the $25,000 limitation (pursuant to
Section 8(b)) and the per Share price used to determine the Purchase Price shall be proportionately adjusted for any increase or decrease in the number of issued Shares resulting from any nonreciprocal transaction between the Company and its
shareholders, (such as a stock dividend, stock split, spin-off, rights offering or recapitalization through a large, nonrecurring cash dividend), that affects the Shares (or other securities of the Company) or
the price of Shares (or other securities) and causes a change in the per share value of the Shares underlying outstanding purchase rights. Such adjustment shall be made by the Committee, whose determination in that respect shall be final, binding
and conclusive. The Committee may not delegate its authority to make adjustments pursuant to this paragraph. Except as expressly provided herein, no issuance by the Company of shares of stock of any class, or securities convertible into shares of
stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of Shares subject to a purchase right. 

(b) Dissolution or Liquidation. In the event of the proposed dissolution or liquidation of the Company, the Offering Period then in
progress shall be shortened by setting a new Purchase Date (the “New Purchase Date”), and shall terminate immediately prior to the consummation of such proposed dissolution or liquidation, unless provided otherwise by the Company.
The New Purchase Date shall be before the date of the Company’s proposed dissolution or liquidation. The Company shall notify each Participant, at least ten (10) U.S. business days prior to the New Purchase Date, that the Purchase Date for
the Participant’s purchase right has been changed to the New Purchase Date and that Shares shall be purchased automatically for the Participant on the New Purchase Date, unless prior to such date the Participant has withdrawn from the Offering
Period as provided in Section 10. 

  
 9 

 (c) Change in Control. In the event of a Change in Control, each outstanding purchase
right shall be assumed or an equivalent purchase right substituted by the successor corporation or a Parent or Subsidiary of the successor corporation. In the event that the successor corporation refuses to assume or substitute for the purchase
right, the Offering Period then in progress shall be shortened by setting a New Purchase Date and shall end on the New Purchase Date. The New Purchase Date shall be before the date of the Company’s proposed merger or Change in Control. The
Company shall notify each Participant in writing, at least ten (10) U.S. business days prior to the New Purchase Date, that the Purchase Date for the Participant’s purchase right has been changed to the New Purchase Date and that Shares
shall be purchased automatically for the Participant on the New Purchase Date, unless prior to such date the Participant has withdrawn from the Offering Period as provided in Section 10. 

16. Administration. 
 (a) Authority of
the Committee. Subject to the terms of the Plan and applicable law, and in addition to other express powers and authorizations conferred on the Committee by the Plan, the Committee shall have sole and plenary authority to administer the Plan,
including, without limitation, the authority to: 
 (i) construe, interpret, reconcile any inconsistency in, correct any default in and
supply any omission in, and apply the terms of the Plan and any Payroll Deduction Authorization Form or other instrument or agreement relating to the Plan, 

(ii) determine eligibility and adjudicate all disputed claims filed under the Plan, including whether Eligible Employees shall participate in
the 423 Component or the Non-423 Component and which entities shall be Designated Subsidiaries or Designated Affiliates, 

(iii) determine the terms and conditions of any purchase right to purchase Shares under the Plan, 

(iv) establish, amend, suspend or waive such rules and regulations and appoint such agents as it shall deem appropriate for the proper
administration of the Plan, 
 (v) amend an outstanding purchase right or grant a replacement purchase right for a purchase right previously
granted under the Plan if, in the Committee’s discretion, it determines that (A) the tax consequences of such purchase right to the Company or the Participant differ from those consequences that were expected to occur on the date the
purchase right was granted, or (B) clarifications or interpretations of, or changes to, tax law or regulations permit purchase rights to be granted that have more favorable tax consequences other than initially anticipated, and 

(vi) make any other determination and take any other action that the Committee deems necessary or desirable for the administration of the
Plan. 

  
 10 

 Notwithstanding any provision to the contrary in this Plan, the Committee may adopt rules or
procedures relating to the operation and administration of the Plan to accommodate the specific requirements of local laws and procedures for jurisdictions outside of the United States. Without limiting the generality of the foregoing, the Committee
specifically is authorized to adopt rules, procedures and subplans, which, for purposes of the Non-423 Component, may be outside the scope of Section 423 of the Code, regarding, without limitation,
eligibility to participate, the definition of Compensation, handling of payroll deductions, making of contributions to the Plan (including, without limitation, in forms other than payroll deductions), establishment of bank or trust accounts to hold
payroll deductions, payment of interest, conversion of local currency, obligations to pay payroll tax, determination of beneficiary-designation requirements, withholding procedures and handling of Share issuances, which may vary according to local
requirements. The Committee may assign any of its administrative tasks set forth in this paragraph to the Administrator, unless constrained by applicable law. However, the Committee may not delegate its authority to make adjustments pursuant to
Section 15(a). 
 (b) Committee Decisions. Unless otherwise expressly provided in the Plan, all designations, determinations,
interpretations and other decisions under or with respect to the Plan or any right to purchase Shares granted under the Plan made by the Committee or its delegate, including, but not limited to decisions of the Administrator in fulfilling its duties
under the Plan, shall be final, conclusive, and binding upon all persons, including the Company, Designated Subsidiary, Designated Affiliate, Participant, Eligible Employee, or any beneficiary of such person, as applicable. 

(c) Indemnification. To the extent allowable pursuant to applicable law, each member of the Board, the Committee, the Administrator or
any employee of the Company, a Designated Subsidiary, or a Designated Affiliate (each such person, a “Covered Person”) shall be indemnified and held harmless by the Company from any loss, cost, liability, or expense that may be imposed
upon or reasonably incurred by such Covered Person in connection with or resulting from any claim, action, suit, or proceeding to which he or she may be a party or in which he or she may be involved by reason of any action or failure to act pursuant
to the Plan and against and from any and all amounts paid by him or her in satisfaction of judgment in such action, suit, or proceeding against him or her; provided, however, that he or she has acted in accordance with his or her
duties and responsibilities to the Company under applicable law, and provided that he or she gives the Company an opportunity, at its own expense, to handle and defend any claim, action, suit, or proceeding to which he or she is a party before he or
she undertakes to handle and defend it on his or her own behalf. The foregoing right of indemnification shall not be exclusive of any other rights of indemnification to which such Covered Persons may be entitled pursuant to the Company’s
Certificate of Incorporation or Bylaws, as a matter of law, or otherwise, or any power that the Company may have to indemnify them or hold them harmless. 

17. Death. Unless otherwise provided in an enrollment form or procedures established by the Administrator from time to time, in the event of the
Participant’s death, any accumulated payroll deductions and other contributions not used to purchase Shares shall be paid to and any Shares credited to his or her brokerage or Plan share account shall be transferred to Participant’s heirs
or estate as soon as reasonably practicable following the Participant’s death. 

  
 11 

 18. Transferability. Payroll deductions, contributions credited to a Participant’s account and
any rights with regard to the purchase of Shares pursuant to a purchase right or to receive Shares under the Plan may not be assigned, alienated, pledged, attached, sold or otherwise disposed of in any way (other than by will, the laws of descent
and distribution or as provided in Section 17) by the Participant. Any such attempt at assignment, transfer, pledge or other disposition shall be without effect, except that the Company may treat such act as an Offering to withdraw funds from
an Offering Period in accordance with Section 10. 
 19. Use of Funds. All payroll deductions or contributions received or held by the Company
under the Plan may be used by the Company for any corporate purpose, and the Company shall not be obligated to segregate such payroll deductions or contributions except as may be required by applicable local law, as determined by the Administrator,
and if so required by the laws of a particular jurisdiction, shall apply to all Participants in the relevant Offering except to the extent otherwise permitted by U.S. Treasury Regulation
Section 1.423-2(f). Until Shares are issued, Participants shall only have the rights of an unsecured creditor, although Participants in specified Offerings may have additional rights where required under
local law, as determined by the Administrator. 
 20. Amendment and Termination. 

(a) Subject to any applicable law or government regulation and to the rules of the NYSE or any successor exchange or quotation system on which
the Shares may be listed or quoted, the Plan may be amended, modified, suspended or terminated by the Board without the approval of the shareholders of the Company. This termination authority may not be delegated. Except as provided in
Section 15, no amendment may make any change in any purchase right previously granted which adversely affects the rights of any Participant or any beneficiary (as applicable) without the consent of the affected Participant or beneficiary. To
the extent necessary to comply with Section 423 of the Code (or any successor rule or provision or any other applicable law, regulation or stock exchange rule), the Company shall obtain shareholder approval of any amendment in such a manner and
to such a degree as required. 
 (b) Without shareholder approval and without regard to whether any Participant rights may be considered to
have been “adversely affected,” the Committee or its delegate, including the Administrator, in each case to the extent permitted under the terms of the Plan, applicable law, the by-laws of the
Company and under the Committee charter, may change the Offering Periods, limit the frequency or number of changes in the amount withheld during an Offering Period, establish the exchange rate applicable to amounts withheld in a currency other than
U.S. dollars, permit payroll withholding in excess of the amount designated by a Participant to adjust for delays or mistakes in the Company’s processing of properly completed Participant Offerings, establish reasonable waiting and adjustment
periods and/or accounting and crediting procedures to ensure that amounts applied toward the purchase of Shares for each Participant properly correspond with amounts withheld from the Participant’s Compensation, and establish such other
limitations or procedures as the Committee deems appropriate. 
 21. Notices. All notices or other communications by a Participant to the Company
under or in connection with the Plan shall be deemed to have been duly given when received in the form and manner specified by the Administrator at the location, or by the person, designated by the Administrator for the receipt thereof. 

  
 12 

 22. Conditions Upon Issuance of Shares. 

(a) Shares shall not be issued with respect to a purchase right unless the purchase of Shares pursuant to such purchase right and the issuance
and delivery of such Shares comply with all applicable law. This may include, without limitation U.S. and non-U.S. and state and local rules and regulations promulgated under U.S. securities laws, and the
requirements of any stock exchange upon which the Shares may then be listed. Share issuance is subject to the approval of counsel for the Company with respect to such compliance. In the event that any payroll deductions or contributions cannot be
used to purchase shares due to noncompliance with applicable rules and regulations, such payroll deductions or contributions shall be promptly refunded to the relevant Participant or beneficiary, as applicable. 

(b) As a condition to the purchase of Shares pursuant to a purchase right, the Company may require the person on whose behalf Shares are
purchased to represent and warrant at the time of any such purchase that the Shares are being purchased only for investment and without any present intention to sell or distribute such Shares if, in the opinion of counsel for the Company, such a
representation is required by any of the applicable provisions of law described in subsection (a) above. 
 23. Share Issuance. All Shares
delivered under the Plan pursuant to the exercise of a purchase right to purchase Shares shall be subject to such stop-transfer orders and other restrictions as the Company may deem advisable under the Plan or the rules, regulations, and other
requirements of the U.S. Securities and Exchange Commission, the NYSE or any other stock exchange or quotation system upon which such Shares or other securities are then listed or reported and any applicable Federal or state laws, and the Company
may take whatever steps are necessary to effect such restrictions. 
 24. Term of Plan. The Plan shall terminate on the earlier of (i) the date
the Plan is terminated by the Board in accordance with Section 20 and (ii) the date on which all purchase rights are exercised in connection with a dissolution or liquidation pursuant to Section 15(b) or Change in Control pursuant to
Section 15(c). No further purchase rights shall be granted or Shares purchased, and no further payroll deductions or contributions shall be collected under the Plan following such termination. 

25. Shareholder Approval. The Plan was approved by the shareholders of the Company on January 19, 2017. 

26. Code Section 409A; Tax Qualification. 

(a) Purchase rights granted under the 423 Component are exempt from the application of Section 409A of the Code. Purchase rights granted
under the Non-423 Component to U.S. taxpayers are intended to be exempt from the application of Section 409A under the short-term deferral exception and any ambiguities shall be construed and interpreted
in accordance with such intent. Subject to Section 26(b), purchase rights granted to U.S. taxpayers under the Non-423 Component are subject to such terms and conditions that will permit such purchase
rights to satisfy the requirements of the short-term deferral exception available under Section 409A of the Code, including the requirement that the Shares subject to a purchase right 

  
 13 

 
be delivered within the short-term deferral period. Subject to Section 26(b), in the case of a Participant who would otherwise be subject to Section 409A of the Code, to the extent the
Company determines that a purchase right or the exercise, payment, settlement or deferral is subject to Section 409A of the Code, the purchase right shall be granted, exercised, paid, settled or deferred in a manner that will comply with
Section 409A of the Code, including Department of Treasury regulations and other interpretive guidance issued thereunder, including without limitation any such regulations or other guidance that may be issued after the Effective Date. Anything
in the foregoing to the contrary notwithstanding, the Company shall have no liability to a Participant or any other party if the purchase right that is intended to be exempt from, or compliant with Section 409A of the Code is not so exempt or
compliant or for any action taken by the Company with respect thereto. 
 (b) Although the Company may endeavor to (i) qualify a
purchase right for favorable tax treatment under the laws of the U.S. or jurisdictions outside of the U.S. or (ii) avoid adverse tax treatment (e.g., under Section 409A of the Code), the Company makes no representation to that
effect and expressly disavows any covenant to maintain favorable or avoid unfavorable tax treatment, notwithstanding anything to the contrary in this Plan, including Section 26(a). The Company is not constrained in its corporate activities by
any potential negative tax impact on Participants under the Plan. 
 27. Severability. If any particular provision of this Plan is found to be
invalid or otherwise unenforceable, such determination shall not affect the other provisions of the Plan, but the Plan shall be construed in all respects as if such invalid provision were omitted. 

28. Governing Law and Jurisdiction. Except to the extent that provisions of this Plan are governed by applicable provisions of the Code or any other
substantive provision of federal law, this Plan shall be construed in accordance with the laws of Delaware, without giving effect to the conflict of laws principles thereof. The jurisdiction and venue for any disputes arising under, or any action
brought to enforce (or otherwise relating to) this Plan shall be exclusively in the courts in Dallas County, Texas, including the Federal Courts located therein (should Federal jurisdiction exist). 

29. Headings. Headings are given to the Sections and subsections of the Plan solely as a convenience to facilitate reference. Such headings shall not
be deemed in any way material or relevant to the construction or interpretation of the Plan. 

  
 14

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