Exhibit 10.16

AMENDED AND RESTATED EMPLOYMENT AGREEMENT

This Amended and Restated Employment Agreement (the “ Agreement ”) is made and entered into effective as of December 15, 2016 by and between Aart J. de Geus (the “ Employee ”) and Synopsys, Inc., a Delaware corporation (the “ Company ”), and amends and restates all prior employment agreements between Employee and the Company.

R E C I T A L S

A. The Employee is and has been employed by the Company and is currently the Company’s Co-Chief Executive Officer and Chairman of the Board of Directors.

B. The Company and the Employee desire to enter into this Agreement to provide additional financial security and benefits to the Employee and to encourage the Employee to continue his employment with the Company.

C. Certain capitalized terms used in the Agreement are defined in Section 7 below.

A G R E E M E N T

In consideration of the mutual covenants herein contained, and in consideration of the continuing employment of the Employee by the Company, the parties agree as follows:

1. Duties and Scope of Employment . The Company shall employ the Employee in the position of Co-Chief Executive Officer, as such position has been defined in terms of responsibilities and compensation as of the effective date of this Agreement. The Board of Directors of the Company (the “ Board ”) shall have the right, at any time prior to the occurrence of a Change of Control, to revise such responsibilities as the Board in its discretion may deem necessary or appropriate. The Employee shall comply with and be bound by the Company’s operating policies, procedures and practices from time to time in effect during his employment. During the term of the Employee’s employment with the Company, the Employee shall continue to devote his full time, skill and attention to his duties and responsibilities, and shall perform them faithfully, diligently and competently, and the Employee shall use his best efforts to further the business of the Company and its affiliated entities.

2.  Base Compensation . The Company shall pay the Employee as compensation for his services a base salary at an annualized rate in an amount to be determined from time to time by the Board or the Compensation Committee of the Board. Such salary shall be paid periodically in accordance with normal Company payroll practices. The annualized compensation specified in this Section 2, as such compensation may be increased or decreased by the Board or the Compensation Committee, is referred to in this Agreement as “ Base Compensation .”

3.  Annual Incentive . Beginning with the Company’s current fiscal year and for each fiscal year thereafter during the term of this Agreement, the Employee shall be eligible to earn additional cash compensation under the Company’s annual incentive plan based upon specific financial and/or other targets approved by the Compensation Committee, with the target amount of such incentive opportunity, generally determined as a percentage of Base Compensation, referred to as the “ Target Incentive .” Any amount of the Target Incentive that is earned will be payable in accordance with the Company’s normal practices and policies pursuant to the terms of the annual incentive plan.

4. Employee Benefits . The Employee shall be eligible to participate in the employee benefit plans and executive compensation programs maintained by the Company applicable to other key executives of the Company, including (without limitation) retirement plans, savings or profit-sharing plans, stock option, incentive or other bonus plans, life, disability, health, accident and other insurance programs, paid vacations, and similar plans or programs, subject in each case to (a) the generally applicable terms and conditions of the applicable plan or program in question and (b) the sole determination of the Board or any committee administering such plan or program.

5.  Employment Relationship . The Company and the Employee acknowledge that the Employee’s employment is and shall continue to be at-will, as defined under applicable law. If the Employee’s employment terminates for any reason, the Employee shall not be entitled to any payments, benefits, damages, awards or compensation other than as provided by this Agreement, or as may otherwise be available in accordance with the Company’s established employee plans and policies at the time of termination.

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6.  Severance Benefits .

(a)  Termination Following A Change of Control . If the Employee’s employment with the Company terminates on or at any time within twenty-four (24) months after a Change of Control, then subject to the release requirement described below, the Employee shall be entitled to receive severance benefits as a result of his “separation from service” (as determined under Treasury Regulations Section 1.409A-1(h)) as follows:

(i)  Involuntary Termination . If the Employee’s employment terminates as a result of Involuntary Termination (other than for Cause or as a result of death or Disability):

(1) the Company shall pay the Employee, on the 30 ^th day following his “separation of service”, a lump sum cash severance payment equal to the sum of (x) two (2) times the Employee’s Base Compensation for the Company’s fiscal year then in effect (ignoring any reduction that forms the basis for Good Reason) or if greater, two (2) times the Employee’s Base Compensation for the Company’s fiscal year immediately preceding the “separation from service”, plus (y) two (2) times the Employee’s Target Incentive for the fiscal year then in effect (ignoring any reduction that forms the basis for Good Reason) or, if no Target Incentive is in effect for such year, two (2) times the Employee’s highest Target Incentive in the three (3) preceding fiscal years.

(2) the Company shall pay the Employee, on the 30th day following his “separation from service”, a lump sum cash severance payment equal to the amount of the COBRA premiums that the Employee would incur to continue the Company’s group health, dental, and vision plan coverage for himself and his eligible dependents (as in effect immediately prior to the “separation from service”) for eighteen (18) months; and

(3) the Company shall accelerate the vesting of all of the Employee’s then-outstanding compensatory equity awards (including but not limited to performance stock awards, stock options, restricted stock units and shares of restricted stock), effective as of the date of his “separation from service.”

(ii)  Voluntary Resignation; Termination For Cause . If the Employee voluntarily resigns from the Company without Good Reason, or if the Company terminates the Employee’s employment for Cause, then the Employee shall not be entitled to receive severance or other benefits except for those (if any) to which he may be entitled under the Company’s then existing severance and benefits plans and policies at the time of such resignation or termination.

(iii)  Disability; Death . If the Company terminates the Employee’s employment as a result of the Employee’s Disability, or if the Employee’s employment terminates due to the death of the Employee, then the Employee shall not be entitled to receive severance or other benefits except for those (if any) to which he may be entitled under the Company’s then existing severance and benefits plans and policies at the time of such Disability or death.

(b)  Termination Apart from a Change of Control . If the Employee’s employment with the Company terminates either prior to the occurrence of a Change of Control or after the twenty-four (24) month period following a Change of Control, then subject to the release requirement described below, the Employee shall be entitled to receive severance benefits as a result of his “separation from service” as follows:

(i)  Involuntary Termination . If the Employee’s employment terminates as a result of Involuntary Termination (other than for Cause or as a result of death or Disability):

(1) the Company shall pay the Employee, on the 30 ^th day following his “separation from service”, a lump sum cash severance payment equal to one (1) times the Employee’s Base Compensation for the Company’s fiscal year then in effect (ignoring any reduction that forms the basis for Good Reason) or if greater, one (1) times the Employee’s Base Compensation for the Company’s fiscal year immediately preceding the “separation from service.”

(2) the Company shall pay the Employee, on the 30 ^th day following his “separation from service”, a lump sum cash severance payment equal to one (1) times the Employee’s Target Incentive for the fiscal year then in effect (ignoring any reduction that forms the basis for Good Reason) or, if no Target Incentive is in effect for such year, one (1) times the Employee’s highest Target Incentive in the three (3) preceding fiscal years.

(3) the Company shall pay the Employee, on the 30th day following his “separation from service”, a lump sum cash severance payment equal to the amount of the COBRA premiums that the Employee would incur to continue the Company’s group health, dental, and vision plan coverage for himself and his eligible dependents (as in effect immediately prior to the “separation from service”) for twelve (12) months.

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(ii)  Voluntary Resignation; Termination for Cause . If the Employee voluntarily resigns from the Company (other than a resignation that is an Involuntary Termination), or if the Company terminates the Employee’s employment for Cause, then the Employee shall not be entitled to receive severance or other benefits except for those, if any, as may then be established under the Company’s then-existing severance and benefits plans and policies at the time of such resignation or termination.

(iii)  Disability; Death . If the Company terminates the Employee’s employment as a result of the Employee’s Disability, or if the Employee’s employment terminates due to the death of the Employee, then the Employee shall not be entitled to receive severance or other benefits except for those (if any) as may then be established under the Company’s then-existing severance and benefit plans and policies at the time of such Disability or death.

(c)  Release . The Employee will not be entitled to receive any severance payments or benefits under this Agreement unless (i) he has delivered to the Company a standard employee waiver and release of claims in favor of the Company, in form and substance satisfactory to the Company, and (ii) such release has become effective not later than the 30 ^th day following his “separation from service.” The Company or any successor thereto must provide a copy of the release to the Employee not more than two (2) days after the Employee’s “separation from service.”

(d)  No Participation In The Synopsys, Inc. Executive Change of Control Severance Benefit Plan . It is agreed that the severance benefits described in this Agreement are in lieu of the severance benefits described in The Synopsys, Inc. Executive Change of Control Severance Benefit Plan, as amended from time to time (the “ Plan ”), and that Employee is not eligible to participate in the Plan.

(e)  Application of Section 409A . It is intended that all of the severance benefits and other payments payable under this Agreement satisfy, to the greatest extent possible, the exemptions from the application of Internal Revenue Code Section 409A provided under Treasury Regulations 1.409A-1(b)(4), 1.409A-1(b)(5) and 1.409A-1(b)(9), and this Agreement will be construed to the greatest extent possible as consistent with those provisions, to the extent applicable. For purposes of Section 409A (including, without limitation, for purposes of Treasury Regulation Section 1.409A 2(b)(2)(iii)), the Employee’s right to receive any payments under this Agreement shall be treated as a right to receive a series of separate payments and, accordingly, each installment payment hereunder shall at all times be considered a separate and distinct payment. If the Employee is deemed by the Company at the time of his “separation from service” to be a “specified employee” for purposes of Section 409A(a)(2)(B)(i), and if any of the payments upon “separation from service” set forth herein and/or under any other agreement with the Company are deemed to be “deferred compensation,” then to the extent delayed commencement of any portion of such payments is required to avoid a prohibited distribution under Code Section 409A(a)(2)(B)(i) and the related adverse taxation under Section 409A, such payments shall not be provided to the Employee prior to the earliest of (i) the expiration of the six-month period measured from the date of the Employee’s “separation from service” with the Company, (ii) the date of his or her death or (iii) such earlier date as permitted under Section 409A without the imposition of adverse taxation. Upon the first business day following the expiration of such applicable Section 409A(a)(2)(B)(i) period, all payments delayed pursuant to this paragraph shall be paid in a lump sum to the Employee, and any remaining payments due shall be paid as otherwise provided herein or in the applicable agreement. No interest shall be due on any amounts so deferred.

(f)  Parachute Payments . Except as otherwise provided in an agreement between Employee and the Company, if any payment or benefit the Employee would receive in connection with a change of control from the Company or otherwise (“ Payment ”) would (i) constitute a “parachute payment” within the meaning of Section 280G of the Code, and (ii) but for this sentence, be subject to the excise tax imposed by Section 4999 of the Code (the “ Excise Tax ”), then such Payment shall be equal to the “Reduced Amount.” The Reduced Amount shall be either (x) the largest portion of the Payment that would result in no portion of the Payment being subject to the Excise Tax, or (y) the largest portion, up to and including the total, of the Payment, whichever amount, after taking into account all applicable federal, state and local employment taxes, income taxes, and the Excise Tax (all computed at the highest applicable marginal rate), results in the Employee’s receipt, on an after-tax basis, of the greater amount of the Payment notwithstanding that all or some portion of the Payment may be subject to the Excise Tax. If a reduction or elimination in payments or benefits constituting “parachute payments” is necessary so that the Payment equals the Reduced Amount, reduction shall occur in the following order: (1) reduction of cash payments; (2) cancellation of accelerated vesting of equity awards other than stock options; (3) cancellation of accelerated vesting of stock options; and (4) reduction of other benefits paid to Employee. Within any such category of payments and benefits (that is, (1)-(4)), a reduction shall occur first with respect to amounts that are not “deferred compensation” within the meaning of Section 409A and then with respect to amounts that are “deferred compensation.” If acceleration of vesting of compensation from Employee’s equity awards is to be reduced, such acceleration of vesting shall be cancelled by first canceling such acceleration for the vesting installment that will vest last and continuing by canceling as a first priority such acceleration for vesting installment with the latest vesting.

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7.  Definition of Terms . The following terms referred to in this Agreement shall have the following meanings:

(a)  Cause . “ Cause ” shall mean (i) any act of personal dishonesty taken by the Employee in connection with his responsibilities as an employee and intended to result in substantial personal enrichment of the Employee, (ii) conviction of a felony that is injurious to the Company, (iii) a willful act by the Employee which constitutes gross misconduct and which is injurious to the Company, or (iv) continued violations by the Employee of the Employee’s obligations under Section 1 of this Agreement that are demonstrably willful and deliberate on the Employee’s part after there has been delivered to the Employee a written demand for performance from the Company which describes the basis for the Company’s belief that the Employee has not substantially performed his duties.

(b)  Change of Control . “ Change of Control ” shall mean the occurrence of any of the following events (provided that to the extent necessary for compliance with Section 409A, a transaction shall not constitute a Change of Control unless such transaction also constitutes a “change in the ownership or effective control of the corporation, or in the ownership of a substantial portion of the assets of” the Company (as provided under Treasury Regulation Section 1.409A-3(a)(5)):

(i) The acquisition by any “person” (as such term is used in Sections 13(d) and 14(d) of the Exchange Act) (other than the Company or a person that directly or indirectly controls, is controlled by, or is under common control with, the Company) of the “beneficial ownership” (as defined in Rule 13d-3 under said Act), directly or indirectly, of securities of the Company representing fifty percent (50%) or more of the total voting power represented by the Company’s then outstanding voting securities; or

(ii) A change in the composition of the Board of Directors of the Company occurring within a two-year period, as a result of which fewer than a majority of the directors are Incumbent Directors. “Incumbent Directors” shall mean directors who either (A) are directors of the Company as of the date hereof, or (B) are elected, or nominated for election, to the Board of Directors of the Company with the affirmative votes of at least a majority of the Incumbent Directors at the time of such election or nomination (but shall not include an individual not otherwise an Incumbent Director whose election or nomination is in connection with an actual or threatened proxy contest relating to the election of directors to the Company); or

(iii) A merger or consolidation of the Company with any other corporation, other than a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity) at least fifty percent (50%) of the total voting power represented by the voting securities of the Company or such surviving entity outstanding immediately after such merger or consolidation, or the approval by the stockholders of the Company of a plan of complete liquidation of the Company or of an agreement for the sale or disposition by the Company of all or substantially all the Company’s assets.

(c)  Disability . “ Disability ” shall mean that the Employee has been unable to substantially perform his duties under this Agreement as the result of his incapacity due to physical or mental illness, and such inability, at least 26 weeks after its commencement, is determined to be total and permanent by a physician selected by the Company or its insurers and acceptable to the Employee or the Employee’s legal representative (such Agreement as to acceptability not to be unreasonably withheld).

(d)  Exchange Act . “ Exchange Act ” shall mean the Securities Exchange Act of 1934, as amended.

(e)  Good Reason . “ Good Reason ” shall mean any of the following actions undertaken without the Employee’s consent: (i) a significant reduction of the Employee’s duties, authority or responsibilities relative to his duties, authority or responsibilities immediately prior to such reduction, (ii) a requirement that the Employee report to another employee or officer of the Company rather than to the Company’s Board of Directors; (iii) a reduction by at least five (5)% in the Employee’s Base Compensation; (iv) a relocation of the Employee’s primary place of business to a location more than fifty (50) miles from the Employee’s primary place of business immediately prior to such relocation; or (v) a material breach of this agreement by the Company or any successor (including a failure to assume all of the material terms of this Agreement).

(f)  Involuntary Termination . “ Involuntary Termination ” shall mean (i) any termination of employment of the Employee by the Company which is not effected for Disability or for Cause; or (ii) the Employee’s resignation for Good Reason, provided that the Employee’s resignation for Good Reason is effective not later than two (2) years from the initial occurrence of such Good Reason, the Employee has provided notice to the Company of the event constituting Good Reason within ninety (90) days of its initial occurrence and the Company has had at least thirty (30) days to cure the Good Reason event and has failed to do so.

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8.  Successors .

(a)  Company’s Successors . Any successor to the Company (whether direct or indirect and whether by purchase, lease, merger, consolidation, liquidation or otherwise) to all or substantially all of the Company’s business and assets shall assume the obligations under this Agreement and agree expressly to perform the obligations under this Agreement in the same manner and to the same extent as the Company would be required to perform such obligations in the absence of a succession. For all purposes under this Agreement, the term “Company” shall include any successor to the Company’s business and assets which executes and delivers the assumption agreement described in this Section 8(a) or which becomes bound by the terms of this Agreement by operation of law.

(b)  Employee’s Successors . The terms of this Agreement and all rights of the Employee hereunder shall inure to the benefit of, and be enforceable by, the Employee’s personal or legal representatives, executors, administrators, successors, heirs, devisees and legatees.

9.  Notice .

(a)  General . Notices and all other communications contemplated by this Agreement shall be in writing and shall be deemed to have been duly given when received electronically (including email addressed to the Employee’s Company email account and to the Company email account of the Company’s General Counsel), personally delivered or when mailed by U.S. registered or certified mail, return receipt requested and postage prepaid. In the case of the Employee, mailed notices shall be addressed to him at the home address which he most recently communicated to the Company in writing. In the case of the Company, mailed notices shall be addressed to its corporate headquarters, and all notices shall be directed to the attention of its Secretary.

(b)  Notice of Termination . Any termination by the Company for Cause or by the Employee as a result of an Involuntary Termination shall be communicated by a notice of termination to the other party hereto given in accordance with Section 9(a) of this Agreement. Such notice shall indicate the specific termination provision in this Agreement relied upon, shall set forth in reasonable detail the facts and circumstances claimed to provide a basis for termination under the provision so indicated, and shall specify the termination date (which shall be not more than ninety (90) days after the giving of such notice). The failure by the Employee to include in the notice any fact or circumstance which contributes to a showing of Good Reason shall not waive any right of the Employee hereunder or preclude the Employee from asserting such fact or circumstance in enforcing his rights hereunder.

10.  Miscellaneous Provisions .

(a)  No Duty to Mitigate . The Employee shall not be required to mitigate the amount of any payment contemplated by this Agreement (whether by seeking new employment or in any other manner), nor shall any such payment be reduced by any earnings that the Employee may receive from any other source.

(b)  Waiver . No provision of this Agreement shall be modified, waived or discharged unless the modification, waiver or discharge is agreed to in writing and signed by the Employee and by an authorized officer of the Company (other than the Employee). No waiver by either party of any breach of, or of compliance with, any condition or provision of this Agreement by the other party shall be considered a waiver of any other condition or provision or of the same condition or provision at another time.

(c)  Whole Agreement . No agreements, representations or understandings (whether oral or written and whether express or implied) which are not expressly set forth in this Agreement have been made or entered into by either party with respect to the subject matter hereof.

(d)  Choice of Law . The validity, interpretation, construction and performance of this Agreement shall be governed by the laws of the State of California.

(e)  Severability . The invalidity or unenforceability of any provision or provisions of this Agreement shall not affect the validity or enforceability of any other provision hereof, which shall remain in full force and effect.

(f)  Arbitration . Any dispute or controversy arising out of, relating to or in connection with this Agreement shall be resolved to the fullest extent permitted by law by final, binding and confidential arbitration in San Jose, California, in accordance with the Employment Arbitration Rules of the American Arbitration Association (“ AAA ”) then in effect, as

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consistent with applicable law. The Employment Arbitration Rules at the time of execution of this Agreement can be found at https://www.adr.org/. Employee understands that if he is unable to access or print these rules, he may obtain a printout of the rules from Human Resources. By agreeing to this arbitration procedure, Employee and the Company both agree to waive the right to resolve any such dispute through a trial by jury, judge or administrative proceeding. The arbitrator shall: (a) have the authority to compel adequate discovery for the resolution of the dispute and to award such relief as would otherwise be permitted by law; and (b) issue a written arbitration decision, to include the arbitrator’s essential findings and conclusions and a statement of the award. The arbitrator shall be authorized to award any or all remedies that Employee or the Company would be entitled to seek in a court of law. The Company shall pay all AAA arbitration fees in excess of the amount of court fees that would be required if the dispute were decided in a court of law. Judgment may be entered on the arbitrator’s award in any court having jurisdiction.

(g)  No Assignment of Benefits . The rights of any person to payments or benefits under this Agreement shall not be made subject to option or assignment, either by voluntary or involuntary assignment or by operation of law, including (without limitation) bankruptcy, garnishment, attachment or other creditor’s process, and any action in violation of this Section 10(g) shall be void.

(h)  Employment Taxes . All payments made pursuant to this Agreement will be subject to withholding of applicable income and employment taxes.

(i)  Assignment by Company . The Company may assign its rights under this Agreement to an affiliate, and an affiliate may assign its rights under this Agreement to another affiliate of the Company or to the Company; provided, however, that no assignment shall be made if the net worth of the assignee is less than the net worth of the Company at the time of assignment. In the case of any such assignment, the term “Company” when used in a section of this Agreement shall mean the corporation that actually employs the Employee.

(j)  Counterparts . This Agreement may be executed in counterparts, each of which shall be deemed an original, but all of which together will constitute one and the same instrument.

IN WITNESS WHEREOF, each of the parties has executed this Agreement, in the case of the Company by its duly authorized officer, as of the day and year first above written.

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Exhibit 10.17

AMENDED AND RESTATED EMPLOYMENT AGREEMENT

This Amended and Restated Employment Agreement (the “ Agreement ”) is made and entered into effective as of December 15, 2016 by and between Chi-Foon Chan (the “ Employee ”) and Synopsys, Inc., a Delaware corporation (the “ Company ”), and amends and restates all prior employment agreements between Employee and the Company.

R E C I T A L S

A. The Employee is and has been employed by the Company and is currently the Company’s President and Co-Chief Executive Officer.

B. The Company and the Employee desire to enter into this Agreement to provide additional financial security and benefits to the Employee and to encourage the Employee to continue his employment with the Company.

C. Certain capitalized terms used in the Agreement are defined in Section 7 below.

A G R E E M E N T

In consideration of the mutual covenants herein contained, and in consideration of the continuing employment of the Employee by the Company, the parties agree as follows:

1.  Duties and Scope of Employment . The Company shall employ the Employee in the position of President and Co-Chief Executive Officer, as such position has been defined in terms of responsibilities and compensation as of the effective date of this Agreement. The Board of Directors (the “ Board ”) shall have the right, at any time prior to the occurrence of a Change of Control, to revise such responsibilities as the Board in its discretion may deem necessary or appropriate. The Employee shall comply with and be bound by the Company’s operating policies, procedures and practices from time to time in effect during his employment. During the term of the Employee’s employment with the Company, the Employee shall continue to devote his full time, skill and attention to his duties and responsibilities, and shall perform them faithfully, diligently and competently, and the Employee shall use his best efforts to further the business of the Company and its affiliated entities.

2.  Base Compensation . The Company shall pay the Employee as compensation for his services a base salary at an annualized rate in an amount to be determined from time to time by the Board or the Compensation Committee of the Board. Such salary shall be paid periodically in accordance with normal Company payroll practices. The annualized compensation specified in this Section 2, as such compensation may be increased or decreased by the Board or the Compensation Committee, is referred to in this Agreement as “ Base Compensation .”

3.  Annual Incentive . Beginning with the Company’s current fiscal year and for each fiscal year thereafter during the term of this Agreement, the Employee shall be eligible to earn additional cash compensation under the Company’s annual incentive plan based upon specific financial and/or other targets approved by the Compensation Committee, with the target amount of such incentive opportunity, generally determined as a percentage of Base Compensation, referred to as the “ Target Incentive .” Any amount of the Target Incentive that is earned will be payable in accordance with the Company’s normal practices and policies pursuant to the terms of the annual incentive plan.

4.  Employee Benefits . The Employee shall be eligible to participate in the employee benefit plans and executive compensation programs maintained by the Company applicable to other key executives of the Company, including (without limitation) retirement plans, savings or profit-sharing plans, stock option, incentive or other bonus plans, life, disability, health, accident and other insurance programs, paid vacations, and similar plans or programs, subject in each case to (a) the generally applicable terms and conditions of the applicable plan or program in question and (b) the sole determination of the Board or any committee administering such plan or program.

5.  Employment Relationship . The Company and the Employee acknowledge that the Employee’s employment is and shall continue to be at-will, as defined under applicable law. If the Employee’s employment terminates for any reason, the Employee shall not be entitled to any payments, benefits, damages, awards or compensation other than as provided by this Agreement, or as may otherwise be available in accordance with the Company’s established employee plans and policies at the time of termination.

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6.  Severance Benefits .

(a)  Termination Following A Change of Control . If the Employee’s employment with the Company terminates on or at any time within twenty-four (24) months after a Change of Control, then subject to the release requirement described below, the Employee shall be entitled to receive severance benefits as a result of his “separation from service” (as determined under Treasury Regulations Section 1.409A-1(h)) as follows:

(i)  Involuntary Termination . If the Employee’s employment terminates as a result of Involuntary Termination (other than for Cause or as a result of death or Disability):

(1) the Company shall pay the Employee, on the 30 ^th day following his “separation of service,” a lump sum cash severance payment equal to the sum of (x) two (2) times the Employee’s Base Compensation for the Company’s fiscal year then in effect (ignoring any reduction that forms the basis for Good Reason) or if greater, two (2) times the Employee’s Base Compensation for the Company’s fiscal year immediately preceding the “separation from service”, plus (y) two (2) times the Employee’s Target Incentive for the fiscal year then in effect (ignoring any reduction that forms the basis for Good Reason) or, if no Target Incentive is in effect for such year, two (2) times the Employee’s highest Target Incentive in the three (3) preceding fiscal years.

(2) the Company shall pay the Employee, on the 30th day following his “separation from service,” a lump sum cash severance payment equal to the amount of the COBRA premiums that the Employee would incur to continue the Company’s group health, dental, and vision plan coverage for himself and his eligible dependents (as in effect immediately prior to the “separation from service”) for eighteen (18) months; and

(3) the Company shall accelerate the vesting of all of the Employee’s then-outstanding compensatory equity awards (including but not limited to performance stock awards, stock options, restricted stock units and shares of restricted stock), effective as of the date of his “separation from service.”

(ii)  Voluntary Resignation; Termination For Cause . If the Employee voluntarily resigns from the Company without Good Reason, or if the Company terminates the Employee’s employment for Cause, then the Employee shall not be entitled to receive severance or other benefits except for those (if any) to which he may be entitled under the Company’s then existing severance and benefits plans and policies at the time of such resignation or termination.

(iii)  Disability; Death . If the Company terminates the Employee’s employment as a result of the Employee’s Disability, or if the Employee’s employment terminates due to the death of the Employee, then the Employee shall not be entitled to receive severance or other benefits except for those (if any) to which he may be entitled under the Company’s then existing severance and benefits plans and policies at the time of such Disability or death.

(b)  Termination Apart from a Change of Control . If the Employee’s employment with the Company terminates either prior to the occurrence of a Change of Control or after the twenty-four (24) month period following a Change of Control, then subject to the release requirement described below, the Employee shall be entitled to receive severance benefits as a result of his “separation from service” as follows:

(i)  Involuntary Termination . If the Employee’s employment terminates as a result of Involuntary Termination (other than for Cause or as a result of death or Disability):

(1) the Company shall pay the Employee, on the 30 ^th day following his “separation from service,” a lump sum cash severance payment equal to one (1) times the Employee’s Base Compensation for the Company’s fiscal year then in effect (ignoring any reduction that forms the basis for Good Reason) or if greater, one (1) times the Employee’s Base Compensation for the Company’s fiscal year immediately preceding the “separation from service.”

(2) the Company shall pay the Employee, on the 30 ^th day following his “separation of service,” a lump sum cash severance payment equal to one (1) times the Employee’s Target Incentive for the fiscal year then in effect (ignoring any reduction that forms the basis for Good Reason) or, if no Target Incentive is in effect for such year, one (1) times the Employee’s highest Target Incentive in the three (3) preceding fiscal years.

(3) the Company shall pay the Employee, on the 30th day following his “separation from service,” a lump sum cash severance payment equal to the amount of the COBRA premiums that the Employee would incur to continue the Company’s group health, dental, and vision plan coverage for himself and his eligible dependents (as in effect immediately prior to the “separation from service”) for twelve (12) months.

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(ii)  Voluntary Resignation ; Termination for Cause. If the Employee voluntarily resigns from the Company (other than a resignation that is an Involuntary Termination), or if the Company terminates the Employee’s employment for Cause, then the Employee shall not be entitled to receive severance or other benefits except for those, if any, as may then be established under the Company’s then-existing severance and benefits plans and policies at the time of such resignation or termination.

(iii)  Disability; Death . If the Company terminates the Employee’s employment as a result of the Employee’s Disability, or if the Employee’s employment terminates due to the death of the Employee, then the Employee shall not be entitled to receive severance or other benefits except for those (if any) as may then be established under the Company’s then-existing severance and benefit plans and policies at the time of such Disability or death.

(c)  Release . The Employee will not be entitled to receive any severance payments or benefits under this Agreement unless (i) he has delivered to the Company a standard employee waiver and release of claims in favor of the Company, in form and substance satisfactory to the Company, and (ii) such release has become effective not later than the 30 ^th day following his “separation from service.” The Company or any successor thereto must provide a copy of the release to the Employee not more than two (2) days after the Employee’s “separation from service.”

(d)  No Participation In The Synopsys, Inc. Executive Change of Control Severance Benefit Plan . It is agreed that the severance benefits described in this Agreement are in lieu of the severance benefits described in The Synopsys, Inc. Executive Change of Control Severance Benefit Plan, as amended from time to time (the “ Plan ”), and that Employee is not eligible to participate in the Plan.

(e)  Application of Section 409A . It is intended that all of the severance benefits and other payments payable under this Agreement satisfy, to the greatest extent possible, the exemptions from the application of Internal Revenue Code Section 409A provided under Treasury Regulations 1.409A-1(b)(4), 1.409A-1(b)(5) and 1.409A-1(b)(9), and this Agreement will be construed to the greatest extent possible as consistent with those provisions, to the extent applicable. For purposes of Section 409A (including, without limitation, for purposes of Treasury Regulation Section 1.409A 2(b)(2)(iii)), the Employee’s right to receive any payments under this Agreement shall be treated as a right to receive a series of separate payments and, accordingly, each installment payment hereunder shall at all times be considered a separate and distinct payment. If the Employee is deemed by the Company at the time of his “separation from service” to be a “specified employee” for purposes of Section 409A(a)(2)(B)(i), and if any of the payments upon “separation from service” set forth herein and/or under any other agreement with the Company are deemed to be “deferred compensation,” then to the extent delayed commencement of any portion of such payments is required to avoid a prohibited distribution under Code Section 409A(a)(2)(B)(i) and the related adverse taxation under Section 409A, such payments shall not be provided to the Employee prior to the earliest of (i) the expiration of the six-month period measured from the date of the Employee’s “separation from service” with the Company, (ii) the date of his or her death or (iii) such earlier date as permitted under Section 409A without the imposition of adverse taxation. Upon the first business day following the expiration of such applicable Section 409A(a)(2)(B)(i) period, all payments delayed pursuant to this paragraph shall be paid in a lump sum to the Employee, and any remaining payments due shall be paid as otherwise provided herein or in the applicable agreement. No interest shall be due on any amounts so deferred.

(f)  Parachute Payments . Except as otherwise provided in an agreement between Employee and the Company, if any payment or benefit the Employee would receive in connection with a change of control from the Company or otherwise (“ Payment ”) would (i) constitute a “parachute payment” within the meaning of Section 280G of the Code, and (ii) but for this sentence, be subject to the excise tax imposed by Section 4999 of the Code (the “ Excise Tax ”), then such Payment shall be equal to the “Reduced Amount.” The Reduced Amount shall be either (x) the largest portion of the Payment that would result in no portion of the Payment being subject to the Excise Tax, or (y) the largest portion, up to and including the total, of the Payment, whichever amount, after taking into account all applicable federal, state and local employment taxes, income taxes, and the Excise Tax (all computed at the highest applicable marginal rate), results in the Employee’s receipt, on an after-tax basis, of the greater amount of the Payment notwithstanding that all or some portion of the Payment may be subject to the Excise Tax. If a reduction or elimination in payments or benefits constituting “parachute payments” is necessary so that the Payment equals the Reduced Amount, reduction shall occur in the following order: (1) reduction of cash payments; (2) cancellation of accelerated vesting of equity awards other than stock options; (3) cancellation of accelerated vesting of stock options; and (4) reduction of other benefits paid to Employee. Within any such category of payments and benefits (that is, (1)-(4)), a reduction shall occur first with respect to amounts that are not “deferred compensation” within the meaning of Section 409A and then with respect to amounts that are “deferred compensation.” If acceleration of vesting of compensation from Employee’s equity awards is to be reduced, such acceleration of vesting shall be cancelled by first canceling such acceleration for the vesting installment that will vest last and continuing by canceling as a first priority such acceleration for vesting installment with the latest vesting.

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7.  Definition of Terms . The following terms referred to in this Agreement shall have the following meanings:

(a)  Cause . “ Cause ” shall mean (i) any act of personal dishonesty taken by the Employee in connection with his responsibilities as an employee and intended to result in substantial personal enrichment of the Employee, (ii) conviction of a felony that is injurious to the Company, (iii) a willful act by the Employee which constitutes gross misconduct and which is injurious to the Company, or (iv) continued violations by the Employee of the Employee’s obligations under Section 1 of this Agreement that are demonstrably willful and deliberate on the Employee’s part after there has been delivered to the Employee a written demand for performance from the Company which describes the basis for the Company’s belief that the Employee has not substantially performed his duties.

(b)  Change of Control . “ Change of Control ” shall mean the occurrence of any of the following events (provided that to the extent necessary for compliance with Section 409A, a transaction shall not constitute a Change of Control unless such transaction also constitutes a “change in the ownership or effective control of the corporation, or in the ownership of a substantial portion of the assets of” the Company (as provided under Treasury Regulation Section 1.409A-3(a)(5)):

(i) The acquisition by any “person” (as such term is used in Sections 13(d) and 14(d) of the Exchange Act) (other than the Company or a person that directly or indirectly controls, is controlled by, or is under common control with, the Company) of the “beneficial ownership” (as defined in Rule 13d-3 under said Act), directly or indirectly, of securities of the Company representing fifty percent (50%) or more of the total voting power represented by the Company’s then outstanding voting securities; or

(ii) A change in the composition of the Board of Directors of the Company occurring within a two-year period, as a result of which fewer than a majority of the directors are Incumbent Directors. “Incumbent Directors” shall mean directors who either (A) are directors of the Company as of the date hereof, or (B) are elected, or nominated for election, to the Board of Directors of the Company with the affirmative votes of at least a majority of the Incumbent Directors at the time of such election or nomination (but shall not include an individual not otherwise an Incumbent Director whose election or nomination is in connection with an actual or threatened proxy contest relating to the election of directors to the Company); or

(iii) A merger or consolidation of the Company with any other corporation, other than a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity) at least fifty percent (50%) of the total voting power represented by the voting securities of the Company or such surviving entity outstanding immediately after such merger or consolidation, or the approval by the stockholders of the Company of a plan of complete liquidation of the Company or of an agreement for the sale or disposition by the Company of all or substantially all the Company’s assets.

(c)  Disability . “ Disability ” shall mean that the Employee has been unable to substantially perform his duties under this Agreement as the result of his incapacity due to physical or mental illness, and such inability, at least 26 weeks after its commencement, is determined to be total and permanent by a physician selected by the Company or its insurers and acceptable to the Employee or the Employee’s legal representative (such Agreement as to acceptability not to be unreasonably withheld).

(d)  Exchange Act . “ Exchange Act ” shall mean the Securities Exchange Act of 1934, as amended.

(e)  Good Reason . “ Good Reason ” shall mean any of the following actions undertaken without the Employee’s consent: (i) a significant reduction of the Employee’s duties, authority or responsibilities relative to his duties, authority or responsibilities immediately prior to such reduction, (ii) a requirement that the Employee report to another employee or officer of the Company rather than to the Company’s Board of Directors; (iii) a reduction by at least five (5)% in the Employee’s Base Compensation; (iv) a relocation of the Employee’s primary place of business to a location more than fifty (50) miles from the Employee’s primary place of business immediately prior to such relocation; or (v) a material breach of this agreement by the Company or any successor (including a failure to assume all of the material terms of this Agreement).

(f)  Involuntary Termination . “ Involuntary Termination ” shall mean (i) any termination of employment of the Employee by the Company which is not effected for Disability or for Cause; or (ii) the Employee’s resignation for Good Reason, provided that the Employee’s resignation for Good Reason is effective not later than two (2) years from the initial occurrence of such Good Reason, the Employee has provided notice to the Company of the event constituting Good Reason within ninety (90) days of its initial occurrence and the Company has had at least thirty (30) days to cure the Good Reason event and has failed to do so.

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8.  Successors .

(a)  Company’s Successors . Any successor to the Company (whether direct or indirect and whether by purchase, lease, merger, consolidation, liquidation or otherwise) to all or substantially all of the Company’s business and assets shall assume the obligations under this Agreement and agree expressly to perform the obligations under this Agreement in the same manner and to the same extent as the Company would be required to perform such obligations in the absence of a succession. For all purposes under this Agreement, the term “Company” shall include any successor to the Company’s business and assets which executes and delivers the assumption agreement described in this Section 8(a) or which becomes bound by the terms of this Agreement by operation of law.

(b)  Employee’s Successors . The terms of this Agreement and all rights of the Employee hereunder shall inure to the benefit of, and be enforceable by, the Employee’s personal or legal representatives, executors, administrators, successors, heirs, devisees and legatees.

9.  Notice .

(a)  General . Notices and all other communications contemplated by this Agreement shall be in writing and shall be deemed to have been duly given when received electronically (including email addressed to the Employee’s Company email account and to the Company email account of the Company’s General Counsel), personally delivered or when mailed by U.S. registered or certified mail, return receipt requested and postage prepaid. In the case of the Employee, mailed notices shall be addressed to him at the home address which he most recently communicated to the Company in writing. In the case of the Company, mailed notices shall be addressed to its corporate headquarters, and all notices shall be directed to the attention of its Secretary.

(b)  Notice of Termination . Any termination by the Company for Cause or by the Employee as a result of an Involuntary Termination shall be communicated by a notice of termination to the other party hereto given in accordance with Section 9(a) of this Agreement. Such notice shall indicate the specific termination provision in this Agreement relied upon, shall set forth in reasonable detail the facts and circumstances claimed to provide a basis for termination under the provision so indicated, and shall specify the termination date (which shall be not more than ninety (90) days after the giving of such notice). The failure by the Employee to include in the notice any fact or circumstance which contributes to a showing of Good Reason shall not waive any right of the Employee hereunder or preclude the Employee from asserting such fact or circumstance in enforcing his rights hereunder.

10.  Miscellaneous Provisions .

(a)  No Duty to Mitigate . The Employee shall not be required to mitigate the amount of any payment contemplated by this Agreement (whether by seeking new employment or in any other manner), nor shall any such payment be reduced by any earnings that the Employee may receive from any other source.

(b)  Waiver . No provision of this Agreement shall be modified, waived or discharged unless the modification, waiver or discharge is agreed to in writing and signed by the Employee and by an authorized officer of the Company (other than the Employee). No waiver by either party of any breach of, or of compliance with, any condition or provision of this Agreement by the other party shall be considered a waiver of any other condition or provision or of the same condition or provision at another time.

(c)  Whole Agreement . No agreements, representations or understandings (whether oral or written and whether express or implied) which are not expressly set forth in this Agreement have been made or entered into by either party with respect to the subject matter hereof.

(d)  Choice of Law . The validity, interpretation, construction and performance of this Agreement shall be governed by the laws of the State of California.

(e)  Severability . The invalidity or unenforceability of any provision or provisions of this Agreement shall not affect the validity or enforceability of any other provision hereof, which shall remain in full force and effect.

(f)  Arbitration . Any dispute or controversy arising out of, relating to or in connection with this Agreement shall be resolved to the fullest extent permitted by law by final, binding and confidential arbitration in San Jose, California, in accordance with the Employment Arbitration Rules of the American Arbitration Association (“ AAA ”) then in effect, as consistent with applicable law. The Employment Arbitration Rules at the time of execution of this Agreement can be found at

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https://www.adr.org/. Employee understands that if he is unable to access or print these rules, he may obtain a printout of the rules from Human Resources. By agreeing to this arbitration procedure, Employee and the Company both agree to waive the right to resolve any such dispute through a trial by jury, judge or administrative proceeding. The arbitrator shall: (a) have the authority to compel adequate discovery for the resolution of the dispute and to award such relief as would otherwise be permitted by law; and (b) issue a written arbitration decision, to include the arbitrator’s essential findings and conclusions and a statement of the award. The arbitrator shall be authorized to award any or all remedies that Employee or the Company would be entitled to seek in a court of law. The Company shall pay all AAA arbitration fees in excess of the amount of court fees that would be required if the dispute were decided in a court of law. Judgment may be entered on the arbitrator’s award in any court having jurisdiction.

(g)  No Assignment of Benefits . The rights of any person to payments or benefits under this Agreement shall not be made subject to option or assignment, either by voluntary or involuntary assignment or by operation of law, including (without limitation) bankruptcy, garnishment, attachment or other creditor’s process, and any action in violation of this Section 10(g) shall be void.

(h)  Employment Taxes . All payments made pursuant to this Agreement will be subject to withholding of applicable income and employment taxes.

(i)  Assignment by Company . The Company may assign its rights under this Agreement to an affiliate, and an affiliate may assign its rights under this Agreement to another affiliate of the Company or to the Company; provided, however, that no assignment shall be made if the net worth of the assignee is less than the net worth of the Company at the time of assignment. In the case of any such assignment, the term “Company” when used in a section of this Agreement shall mean the corporation that actually employs the Employee.

(j)  Counterparts . This Agreement may be executed in counterparts, each of which shall be deemed an original, but all of which together will constitute one and the same instrument.

IN WITNESS WHEREOF, each of the parties has executed this Agreement, in the case of the Company by its duly authorized officer, as of the day and year first above written.

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Exhibit 10.18

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PLAN OBJECTIVES:

This Synopsys Executive Incentive Plan (the “ Plan ”) provides members of the Company’s management the potential to earn variable compensation linked directly to:

The Plan permits the payment of incentive bonuses that qualify as “performance-based compensation” within the meaning of Section 162(m) of the Internal Revenue Code (“ Section 162(m) ”), and therefore, are not subject to the annual $1 million limitation on the income tax deductibility of compensation paid to covered executive officers imposed under Section 162(m). To the extent that the Compensation Committee of the Company’s Board of Directors (or other duly authorized committee of the Board of Directors, the “ Committee ”) determines to comply with such qualification with respect to any given award, the granting, administration and payment of such award under the Plan shall be made subject to the requirements of Section 162(m) and the stockholder-approved Section 162(m) parameters set forth in the Company’s 2006 Employee Equity Incentive Plan, as amended (the “ 2006 Equity Plan ”).

ELIGIBILITY:

Subject to achievement as described below, an employee is eligible to earn an incentive award under the Plan if:

Any employee who satisfies the eligibility requirements above is an “ Eligible Employee ,” as such term is used in this Plan. If an employee transitions into a role during the performance period that would qualify such employee as an Eligible Employee, or if an Eligible Employee transitions out of a role during a performance period that would result in such employee ceasing to be an Eligible Employee, the Committee will determine in connection with such transition whether such employee shall participate in the Plan (and the size of the Target Award) for the then-ongoing performance period, and such decision shall be final and binding on the employee.

ADMINISTRATION:

The Plan shall be administered by the Committee. The Committee shall have authority to make rules and adopt administrative procedures in connection with the Plan and shall have discretion to provide for situations or conditions not specifically provided for herein consistent with the purposes of the Plan. Notwithstanding any other provision of the Plan to the contrary, if the Committee determines to comply with the rules governing “performance-based compensation” within the meaning of Section 162(m) with respect to any given award, the Committee shall administer and interpret the Plan with respect to such award in a manner consistent with the “performance-based compensation” requirement of Section 162(m), including the requirements regarding timing and manner of decision making. Determinations by the Committee shall be final and binding on the Company, all Eligible Employees, and all other persons.

PERFORMANCE PERIOD:

The Committee shall determine the beginning and ending dates for each performance period. Unless otherwise determined by the Committee, the performance period shall correspond to the Company’s fiscal year.

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INCENTIVE TARGET AWARDS:

The Committee shall approve the individual incentive target award (each, a “ Target Award ”) for each Eligible Employee. The Target Award is equal to a percentage of the Eligible Employee’s regular base salary for the performance period (at the rate in effect at the time the Committee determines the Target Award). If an Eligible Employee’s base salary or role with the Company is changed during a performance period, the Committee will determine whether and how the Target Award size will be adjusted, subject, in the case of awards intended to comply with Section 162(m), to the limitations imposed under Section 162(m). Stock-based compensation, cash variable compensation, employee benefit value, any additional bonus, commission or other incentive plans, and any non-recurring or other extraordinary cash compensation (e.g., relocation payments or signing bonuses) are not included in the Target Award calculation.

FUNDING GOAL - PERFORMANCE CRITERIA:

No amount will be earned under the Plan unless the Company achieves the “ Funding Goal ” selected by the Committee for the applicable performance period from the list of permitted performance criteria (and permitted adjustments to the manner of measurement of such criteria) set forth in the 2006 Equity Plan. If the Company fails to achieve the Funding Goal, no amounts will be earned or paid under this Plan for such performance period. If the Company achieves the Funding Goal, the Plan will fund at the maximum award per Eligible Employee for such performance period.

The maximum Final Award that any Eligible Employee may earn in any performance period is 200% of such employee’s Target Award. The Committee will then use negative discretion in respect of such Final Award for each Eligible Employee to determine the actual award earned by such Eligible Employee, as set forth herein.

CORPORATE FINANCIAL & REVENUE PREDICTABILITY PERFORMANCE GOALS:

First, the Committee shall determine the Company’s achievement of the following Corporate Financial Performance Goals (weighted as set forth below) and the Revenue Predictability Goal and apply such determination to the following formula:

Target Award x Corporate Financial Payout Factor x Revenue Predictability Payout Factor (if any) x Corporate Multiple (if any)

CORPORATE FINANCIAL PERFORMANCE GOALS:

Current Fiscal Year Revenue Target – 33.33%

Current Fiscal Year Non-GAAP Operating Margin Target – 33.33%

Following Fiscal Year Revenue Backlog Target – 33.34%

REVENUE PREDICTABILITY GOAL:

Second Following Fiscal Year Revenue Backlog Target

The “ Corporate Financial Payout Factor ” is equal to the weighted average of the achievement of the three Corporate Financial Performance Goals for the completed performance period. Minimum weighted average results of 90% must be achieved before any Eligible Employee may earn an award under this Plan. At the start of each performance period, the Committee will approve a matrix that specifies the Corporate Financial Payout Factor for achievement at different levels of weighted average Corporate Financial Performance Goals.

The “ Revenue Predictability Payout Factor ” is determined using a matrix approved by the Committee based on the achievement of the Second Following Fiscal Revenue Backlog Target for the completed performance period. If a minimum of 100% performance is achieved, the Revenue Predictability Payout Factor will equal 100%. At the start of each performance period, the Committee will approve a matrix that specifies the Revenue Predictability Payout Factor for achievement at different levels of performance above the minimum Revenue Predictability Goal.

The “ Corporate Multiple ” is an additional multiplier that is used if the weighted average achievement of the Corporate Financial Performance Goals is greater than 100%; that is, in addition to the Corporate Financial Payout Factor, the formula may include the use of a multiplier that the Committee approves at the start of the applicable performance period. For the avoidance of doubt, the use or approval of a Corporate Multiple is determined at the sole discretion of the Committee.

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FINAL AWARDS:

The Committee will determine the “ Final Award ” for each Eligible Employee by utilizing the formula set forth above, and taking into account management’s recommendations to the Committee regarding individual performance. The Committee may also reduce Final Awards based on the Company’s achievement of other financial goals, product milestones, or strategic goals, as well as cross-functional teamwork and collaboration, unforeseen changes in the economy and/or geopolitical climate and any other factors deemed material by the Committee.

PAYMENT SCHEDULE:

Payment of Final Awards will occur within thirty (30) days following the date of the written certification by the Committee (the “ Certificate Date ”) that the performance and other criteria for payment have been satisfied and the Final Award is determined, but in all cases not later than the date necessary for compliance with Treasury Regulations Section 1.409A-1(b)(4). An Eligible Employee must remain employed by the Company as of the payment date to earn and vest in the Final Award. The Committee reserves the discretion to pay the Final Award, or a portion thereof, using shares of the Company’s common stock issued under the 2006 Equity Plan.

All payments under this Plan are subject to recovery in accordance with the Compensation Recovery Policy of the Company, as modified from time to time, as well as any clawback policy required by applicable law.

IMPORTANT NOTES ABOUT THE PLAN:

This Plan supersedes and replaces all prior executive incentive plans applicable to employees at or above the level of Vice President for performance periods commencing on or after the effective date of this Plan. The Committee reserves the right to terminate or make changes to the Plan, including changes consistent with Section 162(m) and the regulations issued thereunder, at any time, with or without notice. The Committee may likewise terminate an individual’s participation in the Plan at any time, with or without notice. Nothing in this Plan shall be construed to be a guarantee that any Eligible Employee will receive all or part of an incentive award or to imply a contract between the Company and any Eligible Employee. Further, participation in the Plan and/or receipt of an award shall not be construed to grant any person the right to remain in the employ of the Company for any specific period of duration. Eligibility for and determination of incentive awards under the Plan are within the sole discretion of the Committee.

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Exhibit 10.19

SYNOPSYS, INC.

AMENDED AND RESTATED EXECUTIVE CHANGE OF CONTROL SEVERANCE BENEFIT PLAN

The Synopsys, Inc. Executive Change of Control Severance Benefit Plan (the “ Plan ”) was established effective March 23, 2006 and is hereby amended and restated effective December 15, 2016. The purpose of the Plan is to provide for the payment of benefits to certain eligible executive employees of Synopsys, Inc. (the “ Company ”) if such employees are subject to qualifying employment terminations in connection with a Change of Control (as such term is defined below). This Plan shall supersede, as to any Eligible Employee, any severance benefit plan, policy, or practice previously maintained by the Company, other than change of control or severance benefits set forth in an equity incentive plan in which the primary form of award is in the form of options on stock of the Company or grants of shares of stock of the Company. Any change of control and/or severance benefits set forth in an equity incentive plan in respect of an equity award held by the Eligible Employee at the time of his or her Covered Termination (as defined below) shall apply as set forth in such plan, and, such awards shall also receive the benefits described herein, provided that in no event will an Eligible Employee become vested as to more than 100% of the shares subject to his or her then-outstanding equity award. This Plan shall not supersede or otherwise amend any severance plan, policy, or practice of the Company with respect to individuals who are not Eligible Employees. This document also constitutes the Summary Plan Description for the Plan.

For purposes of the Plan, the following terms are defined as follows:

(a) “ Base Salary” means the Eligible Employee’s annual base pay (excluding incentive pay, premium pay, commissions, overtime, bonuses and other forms of variable compensation), at the rate in effect during the last regularly scheduled payroll period immediately preceding the date of the Eligible Employee’s Covered Termination, ignoring any reduction in Base Salary that forms the basis for Constructive Termination.

(b) “ Board” means the Board of Directors of the Company.

(c) “ Change of Control” means the occurrence, in a single transaction or in a series of related transactions, of any one or more of the following events:

(i) any person becomes the Owner, directly or indirectly, of securities of the Company representing more than fifty percent (50%) of the combined voting power of the Company’s then outstanding securities other than by virtue of a merger, consolidation or similar transaction. Notwithstanding the foregoing, a Change of Control shall not be deemed to occur (A) on account of the acquisition of securities of the Company by an investor, any affiliate thereof or any other person from the Company in a transaction or series of related transactions the primary purpose of which is to obtain financing for the Company through the issuance of equity securities or (B) solely because the level of Ownership held by any person (the “ Subject Person ”) exceeds the designated percentage threshold of the outstanding voting securities as a result of a repurchase or other acquisition of voting securities by the Company reducing the number of shares outstanding, provided that if a Change of Control would occur (but for the operation of this sentence) as a result of the acquisition of voting securities by the Company, and after such share acquisition, the Subject Person becomes the owner of any additional voting securities that, assuming the repurchase or other acquisition had not occurred, increases the percentage of the then outstanding voting securities Owned by the Subject Person over the designated percentage threshold, then a Change of Control shall be deemed to occur;

(ii) there is consummated a merger, consolidation or similar transaction involving (directly or indirectly) the Company and, immediately after the consummation of such merger, consolidation or similar transaction, the stockholders of the Company immediately prior thereto do not Own, directly or indirectly, either (A) outstanding voting securities representing more than fifty percent (50%) of the combined outstanding voting power of the surviving entity in such merger, consolidation or similar transaction or (B) more than fifty percent (50%) of the combined outstanding voting power of the parent of the surviving entity in such merger, consolidation or similar transaction, in each case in substantially the same proportions as their Ownership of the outstanding voting securities of the Company immediately prior to such transaction;

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(iii) the stockholders of the Company approve or the Board approves a plan of complete dissolution or liquidation of the Company, or a complete dissolution or liquidation of the Company shall otherwise occur;

(iv) there is consummated a sale, lease, license or other disposition of all or substantially all of the consolidated assets of the Company and its Subsidiaries, other than a sale, lease, license or other disposition of all or substantially all of the consolidated assets of the Company and its Subsidiaries to an Entity, more than fifty percent (50%) of the combined voting power of the voting securities of which are Owned by stockholders of the Company in substantially the same proportions as their Ownership of the Company immediately prior to such sale, lease, license or other disposition; or

(v) individuals who, on the date this Plan is adopted by the Board, are members of the Board (the “ Incumbent Board ”) cease for any reason to constitute at least a majority of the members of the Board; provided, however, that if the appointment or election (or nomination for election) of any new Board member was approved or recommended by a majority vote of the members of the Incumbent Board then still in office, such new member shall, for purposes of this Plan, be considered as a member of the Incumbent Board.

For the avoidance of doubt, the term Change of Control shall not include a sale of assets, merger or other transaction effected exclusively for the purpose of changing the domicile of the Company. Once a Change of Control has occurred, no future events shall constitute a Change of Control for purposes of the Plan. To the extent required for compliance under Code Section 409A, no transaction shall be a Change of Control for purposes of this Plan unless such transaction also constitutes a “change in the ownership or effective control of the corporation, or in the ownership of a substantial portion of the assets of” the Company (as provided under Treasury Regulation Section 1.409A-3(a)(5)).

(d) “ COBRA” means the Consolidated Omnibus Budget Reconciliation Act of 1985, as amended.

(e) “ Code” means the Internal Revenue Code of 1986, as amended.

(f) “ Company” means Synopsys, Inc., a Subsidiary or, following a Change of Control, the surviving entity resulting from such transaction.

(g) “ Constructive Termination” means a termination of employment by an Eligible Employee within sixty (60) days after one of the following is undertaken without the Eligible Employee’s express written consent:

(i) the Company significantly reduces the Eligible Employee’s duties, authority or responsibilities, relative to the Eligible Employee’s duties, authority or responsibilities as in effect immediately prior to such reduction, taken as a whole; provided, however, that a change in the Eligible Employee’s title shall not be taken into account in determining if the Eligible Employee’s duties, authority or responsibilities have been reduced for the purposes of this Section 2(g)(i);

(ii) the Company reduces the Eligible Employee’s Base Salary, unless such reduction is made in connection with an across-the-board reduction of substantially all executives’ annual base salaries including those of the acquiring company;

(iii) a relocation of an Eligible Employee’s primary business office to a location more than seventy-five (75) miles from the location at which the Eligible Employee predominately performed duties as of the effective date of the Change of Control, except for required travel by the Eligible Employee on the Company’s business to an extent substantially consistent with the Eligible Employee’s business travel obligations prior to the Change of Control.

Notwithstanding the foregoing, a termination shall not constitute a Constructive Termination based on conduct described above unless (A) within the thirty (30) day period following the occurrence of the conduct, the Eligible Employee provides the Chief Executive Officer of the Company or the successor entity in the Change of Control, as applicable, with written notice specifying (x) the particulars of the conduct and (y) that the Eligible Employee deems such conduct to be described in (i), (ii) or (iii) of this Section 2(g), (B) the conduct described has not been cured within thirty (30) days following receipt by the Chief Executive Officer of such notice, and (C) such Eligible Employee’s resignation from all positions he or she then holds with the Company is effective not later than sixty (60) days after the first occurrence of such conduct.

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(h) “ Covered Termination” means either (A) an Involuntary Termination Without Cause which occurs within thirty (30) days prior to or twelve (12) months following the effective date of a Change of Control, or (B) a Constructive Termination which occurs on or within twelve (12) months following the effective date of a Change of Control. Termination of employment of an Eligible Employee due to death or disability shall not constitute a Covered Termination unless a voluntary termination of employment by the Eligible Employee immediately prior to the Eligible Employee’s death or disability would have qualified as a Constructive Termination. For purposes of the Plan, an event constituting a Covered Termination must also constitute a Separation from Service.

(i) “ Eligible Employee” means an employee of the Company (A) who has been designated by the Board as (i) an “officer” under Section 16 of the Securities Exchange Act of 1934, as amended or (ii) a member of the Company’s corporate staff; (B) who has received, signed and timely returned a Participation Notice; and (C) whose employment with the Company terminates due to a Covered Termination.

(j) “ Entity” means a corporation, partnership or other entity.

(k) “ ERISA” means the Employee Retirement Income Security Act of 1974, as amended.

(l) “ Involuntary Termination Without Cause” means a termination by the Company of an Eligible Employee’s employment relationship with the Company for any reason other than death, disability, or any of the following:

(i) the Eligible Employee has committed an act of personal dishonesty in connection with the Eligible Employee’s responsibilities as a Company employee;

(ii) the Eligible Employee commits a felony or any act of moral turpitude;

(iii) the Eligible Employee commits any willful or grossly negligent act that constitutes gross misconduct and/or injures, or is reasonably likely to injure, the Company; or

(iv) the Eligible Employee substantially fails to perform the Eligible Employee’s job duties and/or willfully and materially violates (A) any written policies or procedures of the Company or (B) the Eligible Employee’s obligations to the Company and that violation, if curable, continues for a period of thirty (30) days after the Company provides the Eligible Employee written notice that describes the basis for the Company’s belief that the Eligible Employee has not substantially performed the Eligible Employee’s duties and/or willfully and materially violated (x) any written policies or procedures of the Company or (y) the Eligible Employee’s obligations to the Company.

(m) “ Own,” “Owned,” “Owner,” “Ownership” A person or Entity shall be deemed to “Own,” to have “Owned,” to be the “Owner” of, or to have acquired “Ownership” of securities if such person or Entity, directly or indirectly, through any contract, arrangement, understanding, relationship or otherwise, has or shares voting power, which includes the power to vote or to direct the voting, with respect to such securities.

(n) “ Participation Notice” means the latest notice delivered by the Company to an employee informing the employee that the employee is a participant in the Plan. A Participation Notice shall be in such form as may be determined by the Company. Notwithstanding the foregoing, neither the Company nor any successor may amend a Participation Notice in any way that is adverse to a participant, without the written consent of the participant, unless the amendment is made more than nine (9) months prior to an applicable Change of Control.

(o) “ Plan Administrator” means the Board or any committee duly authorized by the Board to administer the Plan. The Plan Administrator may, but is not required to be, the Compensation Committee of the Board. The Board may at any time administer the Plan, in whole or in part, notwithstanding that the Board has previously appointed a committee to act as the Plan Administrator.

(p) “ Separation from Service ” means a “separation from service” within the meaning of Code Section 409A and Treasury Regulation Section 1.409A-1(h), without regard to any alternative definitions thereunder.

(q) “ Subsidiary” means, with respect to the Company, (A) any corporation of which more than fifty percent (50%) of the outstanding capital stock having ordinary voting power to elect a majority of the board of directors of such corporation (irrespective of whether, at the time, stock of any other class or classes of such corporation shall have or might

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have voting power by reason of the happening of any contingency) is at the time, directly or indirectly, Owned by the Company, and (B) any partnership in which the Company has a direct or indirect interest (whether in the form of voting or participation in profits or capital contribution) of more than fifty percent (50%).

(a) General Rules. Subject to the limitations set forth in this Section 3 and Section 5, in the event of a Covered Termination, the Company shall provide the severance benefits described in Section 4 to each affected Eligible Employee.

(b) Exceptions to Benefit Entitlement. An employee, including an employee who otherwise is an Eligible Employee, will not receive benefits under the Plan (or will receive reduced benefits under the Plan) in the following circumstances, as determined by the Plan Administrator in its sole discretion:

(i) the employee’s employment terminates or is terminated for any reason other than a Covered Termination;

(ii) the employee resigns his or her employment with the Company in order to accept employment with another entity that is controlled (directly or indirectly) by the Company or is otherwise an affiliate of the Company;

(iii) the employee does not confirm in writing that he or she shall be subject to the provisions of Section 5(f), the employee’s proprietary information agreement with the Company or the employee’s confidentiality agreement with the Company;

(iv) the employee is rehired by the Company prior to the date benefits under the Plan are scheduled to be paid or otherwise commence; or

(v) the employee is offered an identical or substantially equivalent or comparable position with the Company or a successor pursuant to a Change of Control. For purposes of the foregoing, a “substantially equivalent or comparable position” is one that offers the employee substantially the same level of responsibility and compensation; provided, however , that an employee shall not be considered to be offered a “substantially equivalent or comparable position” if a resignation by the employee would constitute a Constructive Termination.

(c) Termination or Return of Benefits. An Eligible Employee’s right to receive benefits under this Plan shall terminate immediately (and any benefits received pursuant to this Plan shall be immediately returned to the Company) if, at any time prior to or during the eighteen (18) month period following a Change of Control, the Eligible Employee, without the prior written approval of the Plan Administrator:

(i) willfully breaches a material provision of the Eligible Employee’s proprietary information or confidentiality agreement with the Company, as referenced in Section 3(b)(iii);

(ii) encourages or solicits any of the Company’s then current employees to leave the Company’s employ for any reason or adversely interferes in any other manner with employment relationships at the time existing between the Company and its then current employees;

(iii) uses the Company’s proprietary or confidential information to induce any of the Company’s then current clients, customers, suppliers, vendors, distributors, licensors, licensees or other third party to terminate or materially diminish their existing business relationship with the Company or interferes in any other manner with any existing business relationship between the Company and any then current client, customer, supplier, vendor, distributor, licensor, licensee or other third party; or

(iv) willfully breaches a material provision of Section 5(f).

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In the event an Eligible Employee incurs a Covered Termination, the Eligible Employee shall receive the benefits set forth in this Section 4, subject, however, to the payment provisions set forth in Section 6 and the other limitations and exclusions set forth in this Plan.

(a) Cash Severance Benefits. Except as otherwise provided herein, the Company shall make four equal quarterly cash severance payments to each Eligible Employee in an amount equal to the sum of (i) one-fourth the Eligible Employee’s Base Salary, as in effect on the date of a Covered Termination, or, if higher, as in effect immediately prior to the Change of Control, plus (ii) an additional payment equal to one-fourth of the product of (i) the Eligible Employee’s annual target bonus at 100% achievement, as in effect on the date of a Covered Termination, or, if higher, as in effect immediately prior to the Change of Control multiplied by (ii) a fraction (x) the numerator of which is the sum of 365 plus the number of calendar days of service actually served by the Eligible Employee in the fiscal year of the Company in which such termination occurs and (y) the denominator of which is 365 (e.g., if a qualifying termination occurs effective May 31st of a given year and the Company’s bonus program is based on an October 31 fiscal year end, the payment pursuant to this Section 4(a) will equal the full bonus for the fiscal year of termination at 100% of target, regardless of the Company’s actual performance, multiplied by ((365 + 212)/365)), such payments to be due on the last day of the third, sixth, ninth and twelfth months following the date of the Covered Termination, provided, however, that if any such payment would otherwise be due on a date that is later than the 15 ^th  day of the third month following the end of the fiscal year in which an Eligible Employee’s Covered Termination occurs, such payment shall instead be made on or prior to the 15 ^th  day of the third month following the end of the fiscal year in which an Eligible Employee’s Covered Termination occurs. For the avoidance of doubt, it is the intent of this Section 4(a) to provide a cash severance benefit equal to 100% of the Base Salary (as modified) plus 100% of the target bonus for the year of the Covered Termination plus a prorated target bonus (so that the total bonus is between 100% and 200% of the target bonus regardless of actual over or under achievement of performance targets).

(b) Health Continuation Coverage. Provided that the Eligible Employee is otherwise eligible for, and has made an election at the time of the Covered Termination to continue the Eligible Employee’s existing Company-provided health coverage (under COBRA or any state or local law of similar effect) under a health, dental, or vision plan sponsored by the Company, each such Eligible Employee shall be entitled to receive a lump-sum payment, subject to applicable tax withholdings, on the sixtieth (60th) day following his or her Separation from Service, equal to the amount of the COBRA premiums (inclusive of premiums for the Eligible Employee’s dependents for such health, dental, or vision plan coverage as in effect immediately prior to the date of the Covered Termination) necessary to maintain such health, dental, or vision plan coverage for a period of twelve (12) months following the date of the Covered Termination. The Eligible Employee may, but is not obligated to, use such payments toward the cost of such health coverage, and shall be solely responsible for making any payments required for any such health coverage elected by the Eligible Employee. The amount owed to the Eligible Employee under this Section 4(b) shall not include any amounts payable by the Eligible Employee under an Internal Revenue Code Section 125 health care reimbursement plan, which amounts, if any, are the sole responsibility of the Eligible Employee.

(c) Vesting Acceleration. Effective upon the Covered Termination, all Company stock awards, including options, restricted stock, stock appreciation rights and any other form of performance-based equity award, then held by the Eligible Employee shall vest in full and become fully exercisable as of the date of such Covered Termination (subject, if applicable, to the exercise period post-termination set forth in the applicable option agreement, or if none is stated, in the plan(s) pursuant to which such options were granted).

(d) Other Employee Benefits. All other benefits (such as life insurance, disability coverage, and 401(k) plan coverage) shall terminate as of the Eligible Employee’s termination date, except to the extent that a conversion privilege may be available thereunder. Any such conversion coverage shall be at the Eligible Employee’s sole expense.

(e) Additional Benefits. Notwithstanding the foregoing, the Plan Administrator may, in its sole discretion, provide benefits in addition to those pursuant to Sections 4(a), 4(b), and 4(c) to Eligible Employees, or to employees who are not Eligible Employees but for whom there has been a termination of employment that would be a Covered Termination if such employee were an Eligible Employee (“ Non-Eligible Employees” ), chosen by the Plan Administrator, in its sole discretion, and the provision of any such benefits to an Eligible Employee or a Non-Eligible Employee shall in no way obligate the Company to provide such benefits to any other Eligible Employee or to any other Non-Eligible Employee, even if similarly situated. If benefits under the Plan are provided to a non-Eligible Employee, references in the Plan to “Eligible Employee” (with the exception of Sections 4(a), 4(b), and 4(c)) shall be deemed to refer to such Non-Eligible Employee. Any benefits paid pursuant to this Section 4(e) shall be paid not later than the fifteenth (15 ^th ) day of the third (3 ^rd ) month following the end of the year in which the Eligible Employee’s rights to such benefits are no longer subject to a substantial risk of forfeiture, as determined under Treasury Regulation Section 1.409A-1(b)(4).

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(a) Release. In order to be eligible to receive benefits under the Plan, an Eligible Employee must execute the Company’s standard (and then-current) severance agreement and general release, and such release must become effective in accordance with its terms, but in all events not later than the sixtieth (60th) day following the Eligible Employee’s Separation from Service. Unless a Change of Control has occurred, the Plan Administrator, in its sole discretion, may modify the form of the required release to comply with applicable law and shall determine the form of the required release and follow any necessary procedure under applicable law, which may be incorporated into a termination agreement or other agreement with the Eligible Employee. The Company or any successor thereto must provide a copy of the release to the Eligible Employee not more than ten (10) days after the Eligible Employee suffers a Covered Termination.

(b) Certain Reductions. The Plan Administrator will reduce an Eligible Employee’s severance benefits under this Plan, to the greatest extent possible, by any other statutory or contractual severance benefits, pay in lieu of notice, or other similar benefits payable to the Eligible Employee by the Company that become payable in connection with the Eligible Employee’s termination of employment pursuant to (i) any applicable legal requirement, including, without limitation, the Worker Adjustment and Retraining Notification Act (the “ WARN Act ”), (ii) a written employment or severance agreement or offer letter with the Company, (iii) any Company policy or local practice providing for the Eligible Employee to remain on the payroll for a limited period of time after being given notice of the termination of the Eligible Employee’s employment, or (iv) any required salary continuation, notice pay, statutory severance payment, or other payments either required by local law, or owed pursuant to a collective labor agreement, as a result of the termination of the Eligible Employee’s employment. The benefits provided under this Plan are intended to satisfy, to the greatest extent possible, any and all statutory, contractual, and collective agreement obligations that may arise out of an Eligible Employee’s termination of employment, and the Plan Administrator shall so construe and implement the terms of the Plan.

(c) Parachute Payments. Except as otherwise provided in an agreement between an Eligible Employee and the Company, if any payment or benefit the Eligible Employee would receive in connection with a Change of Control from the Company or otherwise (“ Payment ”) would (i) constitute a “parachute payment” within the meaning of Section 280G of the Code, and (ii) but for this sentence, be subject to the excise tax imposed by Section 4999 of the Code (the “ Excise Tax ”), then such Payment shall be equal to the Reduced Amount. The “Reduced Amount” shall be either (x) the largest portion of the Payment that would result in no portion of the Payment being subject to the Excise Tax, or (y) the largest portion, up to and including the total, of the Payment, whichever amount, after taking into account all applicable federal, state, provincial and local employment taxes, income taxes, and the Excise Tax (all computed at the highest applicable marginal rate), results in the Eligible Employee’s receipt, on an after-tax basis, of the greater amount of the Payment notwithstanding that all or some portion of the Payment may be subject to the Excise Tax. If a reduction in payments or benefits constituting “parachute payments” is necessary so that the Payment equals the Reduced Amount, reduction shall occur in the following order: (1) reduction of cash payments; (2) cancellation of accelerated vesting of equity awards other than stock options; (3) cancellation of accelerated vesting of stock options; and (4) reduction of other benefits paid to an Eligible Employee. Within any such category of payments and benefits (that is, (1)-(4)), a reduction shall occur first with respect to amounts that are not “deferred compensation” within the meaning of Section 409A and then with respect to amounts that are “deferred compensation”. If acceleration of vesting of compensation from an Eligible Employee’s equity awards is to be reduced, such acceleration of vesting shall be cancelled, subject to the immediately preceding sentence, by first canceling such acceleration for the vesting installment that will vest last and continuing by canceling as a first priority such acceleration for vesting installment with the latest vesting; provided, however, that if Section 409A is not applicable by law to an Eligible Employee, the Plan Administrator may determine whether any similar law in the Eligible Employee’s jurisdiction applies and may be taken into account.

(d) Mitigation. Except as otherwise specifically provided herein, an Eligible Employee shall not be required to mitigate damages or the amount of any payment provided under this Plan by seeking other employment or otherwise, nor shall the amount of any payment provided for under this Plan be reduced by any compensation earned by an Eligible Employee as a result of employment by another employer or any retirement benefits received by such Eligible Employee after the date of the Eligible Employee’s termination of employment with the Company.

(e) Non-Duplication of Benefits. Except as otherwise specifically provided for herein, no Eligible Employee is eligible to receive benefits under this Plan more than one time. The payments pursuant to this Plan are in addition to, and not in lieu of, any unpaid salary, bonuses or benefits to which an Eligible Employee may be entitled for the period ending prior to the Eligible Employee’s Covered Termination.

(f) Noncompetition. To the fullest extent permitted by law, in the event of a change of control that constitutes a transaction within the meaning of California Business and Professions Code section 16601 between Eligible Employee and the Company (to wit, Eligible Employee sells the goodwill of the Company, disposes (by merger or otherwise) of all of his or her ownership interest in the Company, or sells all or substantially all of the operating assets together with the goodwill of the business or of a division or a subsidiary of the business), then at the written request of the Company or the surviving corporation in a Change of Control, for a period of eighteen (18) months following the effective date of the Change of Control, the Eligible Employee shall not serve as an officer, director, stockholder, employee, partner, proprietor, investor, joint venturer, affiliate, agent or consultant of any other person, corporation, firm, partnership or other entity whatsoever that competes directly or indirectly with the Company or any Subsidiary of the Company (“ Applicable Entities ”) anywhere in the world, in any line of business engaged in (or reasonably planned to be engaged in) by the Applicable Entities immediately prior to the effective time of the Change of Control; provided, however , that the Eligible Employee may hold, as a passive investment, up to (i) 2% of any class of securities of any private enterprise (but without active participation in the activities of such enterprise); or (ii) 1% of any class of securities of any publicly-traded enterprise (but without active participation in the activities of such enterprise).

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(a) General Rules . Except as otherwise provided herein, the payment of benefits in Section 4 shall be made in accordance with and subject to the Company’s normal payroll practices. In no event shall payment of any Plan benefit be made prior to the Eligible Employee’s Separation from Service or prior to the effective date of the release described in Section 5(a). For the avoidance of doubt, in the event of an acceleration of the exercisability of an option or other equity award pursuant to Section 4(c), such option or other equity award shall not be exercisable with respect to such acceleration of exercisability unless and until the effective date of the release described in Section 5(a).

(b) Application of Section 409A. It is intended that all of the severance benefits and other payments payable under this Plan satisfy, to the greatest extent possible, the exemptions from the application of Code Section 409A provided under Treasury Regulations 1.409A 1(b)(4), 1.409A 1(b)(5) and 1.409A 1(b)(9), and this Plan will be construed to the greatest extent possible as consistent with those provisions, to the extent applicable. The Plan Administrator will determine whether any similar law in the Eligible Employee’s jurisdiction applies and how such law will be taken into account. For purposes of Code Section 409A (including, without limitation, for purposes of Treasury Regulation Section 1.409A 2(b)(2)(iii)), an Eligible Employee’s right to receive any installment payments under this Plan shall be treated as a right to receive a series of separate payments and, accordingly, each installment payment hereunder shall at all times be considered a separate and distinct payment. Notwithstanding any provision to the contrary in this Plan, if an Eligible Employee is deemed by the Company at the time of his or her Separation from Service to be a “specified employee” for purposes of Code Section 409A(a)(2)(B)(i), and if any of the payments upon Separation from Service set forth herein and/or under any other agreement with the Company are deemed to be “deferred compensation,” then to the extent delayed commencement of any portion of such payments is required in order to avoid a prohibited distribution under Code Section 409A(a)(2)(B)(i) and the related adverse taxation under Section 409A, such payments shall not be provided to the Eligible Employee prior to the earliest of (i) the expiration of the six-month period measured from the date of the Eligible Employee’s Separation from Service with the Company, (ii) the date of his or her death or (iii) such earlier date as permitted under Section 409A without the imposition of adverse taxation. Upon the first business day following the expiration of such applicable Code Section 409A(a)(2)(B)(i) period, all payments deferred pursuant to this paragraph shall be paid in a lump sum to the Eligible Employee, and any remaining payments due shall be paid as otherwise provided herein or in the applicable agreement. No interest shall be due on any amounts so deferred.

(c) Withholding . All payments under the Plan will be subject to all applicable withholding obligations of the Company, without limitation, obligations to withhold for federal, state, provincial and local income and employment taxes.

(d) Indebtedness of Eligible Employees . If an Eligible Employee is indebted to the Company on the effective date of his or her Covered Termination, the Plan Administrator reserves the right to offset any severance payments under the Plan by the amount of such indebtedness. Such offset shall be made in accordance with all applicable laws.

(a) Exclusive Discretion. The Plan Administrator shall have the exclusive discretion and authority to establish rules, forms, and procedures for the administration of the Plan, and to construe and interpret the Plan and to decide any and all questions of fact, interpretation, definition, computation or administration arising in connection with the operation of the Plan, including, but not limited to, the eligibility to participate in the Plan and amount of benefits paid under the Plan, as well as any adjustments that need to be made in accordance with the laws applicable to an Eligible Employee. The rules, interpretations, computations and other actions of the Plan Administrator shall be binding and conclusive on all persons.

(b) Amendment or Termination. The Company reserves the right to amend or terminate this Plan or the benefits provided hereunder at any time; provided, however, that no such amendment or termination shall occur during the period that begins six (6) months prior to a Change of Control and ends twelve (12) months after such Change of Control as to any Eligible Employee who would be adversely affected by such amendment or termination unless such Eligible Employee consents in writing to such amendment or termination. Any action amending or terminating the Plan shall be in writing and executed by the Chief Executive Officer or General Counsel of the Company.

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The Plan shall not be deemed (i) to give any employee or other person any right to be retained in the employ of the Company, or (ii) to interfere with the right of the Company to discharge any employee or other person at any time, with or without cause, which right is hereby reserved.

Subject to applicable law, this Plan is intended to be governed by and shall be construed in accordance with ERISA and, to the extent not preempted by ERISA, the laws of the State of California.

(a) Applications for Benefits and Inquiries. Any application for benefits, inquiries about the Plan or inquiries about present or future rights under the Plan must be submitted to the Plan Administrator in writing by an applicant (or his or her authorized representative). The Plan Administrator is set forth in Section 12(d).

(b) Denial of Claims . In the event that any application for benefits is denied in whole or in part, the Plan Administrator must provide the applicant with written or electronic notice of the denial of the application, and of the applicant’s right to review the denial. Any electronic notice will comply with the regulations of the U.S. Department of Labor. The notice of denial will be set forth in a manner designed to be understood by the applicant and will include the following:

(i) the specific reason or reasons for the denial;

(ii) references to the specific Plan provisions upon which the denial is based;

(iii) a description of any additional information or material that the Plan Administrator needs to complete the review and an explanation of why such information or material is necessary; and

(iv) an explanation of the Plan’s review procedures and the time limits applicable to such procedures, including a statement of the applicant’s right to bring a civil action under Section 502(a) of ERISA following a denial on review of the claim, as described in Section 10(d) below.

This notice of denial will be given to the applicant within ninety (90) days after the Plan Administrator receives the application, unless special circumstances require an extension of time, in which case, the Plan Administrator has up to an additional ninety (90) days for processing the application. If an extension of time for processing is required, written notice of the extension will be furnished to the applicant before the end of the initial ninety (90) day period.

This notice of extension will describe the special circumstances necessitating the additional time and the date by which the Plan Administrator is to render its decision on the application.

(c) Request for a Review . Any person (or that person’s authorized representative) for whom an application for benefits is denied, in whole or in part, may appeal the denial by submitting a request for a review to the Plan Administrator within sixty (60) days after the application is denied. A request for a review shall be in writing and shall be addressed to:

Synopsys, Inc.

Attn: General Counsel

690 East Middlefield Road

Mountain View, CA 94043

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A request for review must set forth all of the grounds on which it is based, all facts in support of the request and any other matters that the applicant feels are pertinent. The applicant (or his or her representative) shall have the opportunity to submit (or the Plan Administrator may require the applicant to submit) written comments, documents, records, and other information relating to his or her claim. The applicant (or his or her representative) shall be provided, upon request and free of charge, reasonable access to, and copies of, all documents, records and other information relevant to his or her claim. The review shall take into account all comments, documents, records and other information submitted by the applicant (or his or her representative) relating to the claim, without regard to whether such information was submitted or considered in the initial benefit determination.

(d) Decision on Review . The Plan Administrator will act on each request for review within sixty (60) days after receipt of the request, unless special circumstances require an extension of time (not to exceed an additional sixty (60) days), for processing the request for a review. If an extension for review is required, written notice of the extension will be furnished to the applicant within the initial sixty (60) day period. This notice of extension will describe the special circumstances necessitating the additional time and the date by which the Plan Administrator is to render its decision on the review. The Plan Administrator will give prompt, written or electronic notice of its decision to the applicant. Any electronic notice will comply with the regulations of the U.S. Department of Labor. In the event that the Plan Administrator confirms the denial of the application for benefits in whole or in part, the notice will set forth, in a manner calculated to be understood by the applicant, the following:

(i) the specific reason or reasons for the denial;

(ii) references to the specific Plan provisions upon which the denial is based;

(iii) a statement that the applicant is entitled to receive, upon request and free of charge, reasonable access to, and copies of, all documents, records and other information relevant to his or her claim; and

(iv) a statement of the applicant’s right to bring a civil action under Section 502(a) of ERISA.

(e) Rules and Procedures. The Plan Administrator will establish rules and procedures, consistent with the Plan and with ERISA, as necessary and appropriate in carrying out its responsibilities in reviewing benefit claims. The Plan Administrator may require an applicant who wishes to submit additional information in connection with an appeal from the denial of benefits to do so at the applicant’s own expense.

(f) Exhaustion of Remedies. No legal action for benefits under the Plan may be brought until the applicant (i) has submitted a written application for benefits in accordance with the procedures described by Section 10(a) above, (ii) has been notified by the Plan Administrator that the application is denied, (iii) has filed a written request for a review of the application in accordance with the appeal procedure described in Section 10(c) above, and (iv) has been notified that the Plan Administrator has denied the appeal. Notwithstanding the foregoing, if the Plan Administrator does not respond to an applicant’s claim or appeal within the relevant time limits specified in this Section 10, the applicant may bring legal action for benefits under the Plan pursuant to Section 502(a) of ERISA.

The Plan shall be unfunded, and all benefits hereunder shall be paid only from the general assets of the Company.

(a) Employer and Plan Identification Numbers. The Employer Identification Number assigned to the Company (which is the “Plan Sponsor” as that term is used in ERISA) by the Internal Revenue Service is 56-1546236. The Plan Number assigned to the Plan by the Plan Sponsor pursuant to the instructions of the Internal Revenue Service and the Department of Labor is 5                     .

(b) Ending Date for Plan’s Fiscal Year. The date of the end of the fiscal year for the purpose of maintaining the Plan’s records is the fiscal year ending on the Saturday that is closest to October 31.

(c) Agent for the Service of Legal Process . The agent for the service of legal process with respect to the Plan is:

Synopsys, Inc.

Attn: General Counsel

690 East Middlefield Road

Mountain View, CA 94043

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(d) Plan Sponsor and Administrator. The “Plan Sponsor” and the “Plan Administrator” of the Plan is:

Synopsys, Inc.

Attn: General Counsel

690 East Middlefield Road

Mountain View, CA 94043

The Plan Sponsor’s and Plan Administrator’s telephone number is (650) 584-5000. The Plan Administrator is the named fiduciary charged with the responsibility for administering the Plan.

Participants in this Plan (which is a welfare benefit plan sponsored by Synopsys, Inc.) are entitled to certain rights and protections under ERISA. If you are an Eligible Employee, you are considered a participant in the Plan for the purposes of this Section 13 and, under ERISA, you are entitled to:

(a) Receive Information About Your Plan and Benefits

(i) Examine, without charge, at the Plan Administrator’s office and at other specified locations, such as worksites, all documents governing the Plan and a copy of the latest annual report (Form 5500 Series), if applicable, filed by the Plan with the U.S. Department of Labor and available at the Public Disclosure Room of the Employee Benefits Security Administration;

(ii) Obtain, upon written request to the Plan Administrator, copies of documents governing the operation of the Plan and copies of the latest annual report (Form 5500 Series), if applicable, and an updated (as necessary) Summary Plan Description. The Administrator may make a reasonable charge for the copies; and

(iii) Receive a summary of the Plan’s annual financial report, if applicable. The Plan Administrator is required by law to furnish each participant with a copy of this summary annual report.

(b) Prudent Actions By Plan Fiduciaries. In addition to creating rights for Plan participants, ERISA imposes duties upon the people who are responsible for the operation of the employee benefit plan. The people who operate the Plan, called “fiduciaries” of the Plan, have a duty to do so prudently and in the interest of you and other Plan participants and beneficiaries. No one, including your employer, your union or any other person, may fire you or otherwise discriminate against you in any way to prevent you from obtaining a Plan benefit or exercising your rights under ERISA.

(c) Enforce Your Rights.

(i) If your claim for a Plan benefit is denied or ignored, in whole or in part, you have a right to know why this was done, to obtain copies of documents relating to the decision without charge, and to appeal any denial, all within certain time schedules.

(ii) Under ERISA, there are steps you can take to enforce the above rights. For instance, if you request a copy of Plan documents or the latest annual report from the Plan, if applicable, and do not receive them within 30 days, you may file suit in a Federal court. In such a case, the court may require the Plan Administrator to provide the materials and pay you up to $110 a day until you receive the materials, unless the materials were not sent because of reasons beyond the control of the Plan Administrator.

(iii) If you have a claim for benefits which is denied or ignored, in whole or in part, you may file suit in a state or Federal court.

(iv) If you are discriminated against for asserting your rights, you may seek assistance from the U.S. Department of Labor, or you may file suit in a Federal court. The court will decide who should pay court costs and legal fees. If you are successful, the court may order the person you have sued to pay these costs and fees. If you lose, the court may order you to pay these costs and fees, for example, if it finds your claim is frivolous.

(d) Assistance With Your Questions. If you have any questions about the Plan, you should contact the Plan Administrator. If you have any questions about this statement or about your rights under ERISA, or if you need assistance in obtaining documents from the Plan Administrator, you should contact the nearest office of the Employee Benefits Security Administration, U.S. Department of Labor, listed in your telephone directory or the Division of Technical Assistance and Inquiries, Employee Benefits Security Administration, U.S. Department of Labor, 200 Constitution Avenue N.W., Washington, D.C. 20210. You may also obtain certain publications about your rights and responsibilities under ERISA by calling the publications hotline of the Employee Benefits Security Administration.

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(a) Notices. Any notice, demand or request required or permitted to be given by either the Company or an Eligible Employee pursuant to the terms of this Plan shall be in writing and shall be deemed given when delivered personally, when received electronically (including email addressed to the Eligible Employee’s Company email account and to the Company email account of the Company’s General Counsel) or deposited in the U.S. mail, First Class with postage prepaid, and addressed to the parties, in the case of the Company, at the address set forth in Section 12(d) and, in the case of an Eligible Employee, at the address as set forth in the Company’s employment file maintained for the Eligible Employee as previously furnished by the Eligible Employee or such other address as a party may request by notifying the other in writing.

(b) Transfer and Assignment. The rights and obligations of an Eligible Employee under this Plan may not be transferred or assigned without the prior written consent of the Company. This Plan shall be binding upon any surviving entity resulting from a Change of Control and upon any other person who is a successor by merger, acquisition, consolidation or otherwise to the business formerly carried on by the Company without regard to whether or not such person or entity actively assumes the obligations hereunder.

(c) Waiver. Any Party’s failure to enforce any provision or provisions of this Plan shall not in any way be construed as a waiver of any such provision or provisions, nor prevent any Party from thereafter enforcing each and every other provision of this Plan. The rights granted the Parties herein are cumulative and shall not constitute a waiver of any Party’s right to assert all other legal remedies available to it under the circumstances.

(d) Severability. Should any provision of this Plan be declared or determined to be invalid, illegal or unenforceable under the laws of the applicable jurisdiction, then the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired.

(e) Section Headings. Section headings in this Plan are included for convenience of reference only and shall not be considered part of this Plan for any other purpose.

To record the amendment and restatement of the Plan as set forth herein, Synopsys, Inc. has caused its duly authorized officer to execute the same.

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SYNOPSYS, INC.

AMENDED AND RESTATED EXECUTIVE CHANGE OF CONTROL SEVERANCE BENEFIT PLAN

PARTICIPATION NOTICE

Synopsys, Inc. (the “ Company ”) has adopted the Synopsys, Inc. Amended and Restated Executive Change of Control Severance Benefit Plan (the “ Plan ”). The Company is providing you with this Participation Notice to inform you that you qualify as a participant in the Plan. A copy of the Plan document is attached to this Participation Notice. [Except as provided below, the][The] terms and conditions of your participation in the Plan are as set forth in the Plan, and in the event of any conflict between this Participation Notice and the Plan, the terms of the Plan shall prevail.

[Your participation in the Plan is modified as follows:                    ]

Please retain a copy of this Participation Notice, along with the Plan document, for your records.

ACKNOWLEDGEMENT

The undersigned hereby acknowledges receipt of the foregoing Participation Notice. The undersigned acknowledges that the undersigned has been advised to obtain tax and financial advice regarding the consequences of participating in the Plan, including the effect, if any, of Sections 409A and 4999 of the Internal Revenue Code. The undersigned further acknowledges that the undersigned has no severance benefits [(other than with respect to awards under the Plan)] except as provided by the attached Plan.