EX-10.1





 Exhibit 10.1 

Sangamo Therapeutics, Inc. 

2018 Equity Incentive Plan 

Adopted by the Compensation Committee of the Board: April 23, 2018 

Approved by the Stockholders: June 11, 2018 

Amended and Restated by the Compensation Committee of the Board: March 20, 2020 

Approved by the Stockholders: May 18, 2020 

Table of Contents 
  

					
	 1. General
	  	 	1	 
	 2. Shares Subject to the Plan
	  	 	1	 
	 3. Eligibility
	  	 	2	 
	 4. Options and Stock Appreciation Rights
	  	 	2	 
	 5. Awards Other Than Options and Stock Appreciation Rights
	  	 	5	 
	 6. Adjustments upon Changes in Common Stock; Other Corporate Events
	  	 	6	 
	 7. Automatic Grants To Eligible Directors
	  	 	7	 
	 8. Administration
	  	 	8	 
	 9. Tax Withholding
	  	 	9	 
	 10. Miscellaneous
	  	 	10	 
	 11. Covenants of the Company
	  	 	12	 
	 12. Additional Rules for Awards Subject to Section 409A
	  	 	13	 
	 13. Severability
	  	 	15	 
	 14. Termination of the Plan
	  	 	15	 
	 15. Definitions
	  	 	15	 

 1. General. 

(a) Successor to and Continuation of Predecessor Plan. The Plan is the successor to and continuation of the Predecessor Plan. As of the
Effective Date, (i) no additional awards may be granted under the Predecessor Plan; (ii) the Predecessor Plan’s Available Reserve will become available for issuance pursuant to Awards granted under this Plan; and (iii) all
outstanding awards granted under the Prior Plans will remain subject to the terms of the Prior Plans; provided, however, that any Prior Plans’ Returning Shares will become available for issuance pursuant to Awards granted under this
Plan. All Awards granted under this Plan will be subject to the terms of this Plan. 
 (b) Eligible Award Recipients and Plan
Purpose. Subject to the terms of the Plan, Employees, Directors and Consultants are eligible to receive Awards. Only Eligible Directors will receive Awards under the Automatic Grant Program. The Company, by means of the Plan, seeks to secure and
retain the services of such persons, to provide incentives for such persons to exert maximum efforts for the success of the Company and any Affiliate and to provide a means by which such persons may be given an opportunity to benefit from increases
in value of the Common Stock through the granting of Awards. 
 (c) Available Awards. The Plan provides for the grant of the
following Awards: (i) Incentive Stock Options; (ii) Nonstatutory Stock Options; (iii) SARs; (iv) Restricted Stock Awards; (v) RSU Awards; (vi) Performance Awards; and (vii) Other Awards. 

(d) Effective Date. The Plan will come into existence on the Effective Date. No Award may be granted under the Plan prior to the
Effective Date. 
 2. Shares Subject to the Plan. 

(a) Share Reserve. 
 (i)
Subject to the adjustments in this Section 2 and in Section 6(a), the aggregate number of shares of Common Stock that may be issued pursuant to Awards will not exceed the sum of: (A) 8,800,000 shares (which were approved at the Annual
Meeting in 2018); plus (B) 9,900,000 shares (which were approved at the Annual Meeting in 2020); plus (C) the number of Prior Plans’ Returning Shares, if any, as such shares become available from time to time; plus (D) 1,703,964 shares
(which is the Predecessor Plan’s Available Reserve). 

  
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 (ii) The number of shares of Common Stock available for issuance under the Plan will be
reduced by: (A) one share for each share of Common Stock issued pursuant to an Appreciation Award granted under the Plan and (B) 1.33 shares for each share of Common Stock issued pursuant to a Full Value Award granted under the Plan. 

(iii) The number of shares of Common Stock available for issuance under the Plan will be increased by: (A) one share for each Prior
Plans’ Returning Share or 2018 Plan Returning Share (as defined in Section 2(d)(i)) subject to an Appreciation Award and (B) 1.33 shares for each Prior Plans’ Returning Share or 2018 Plan Returning Share (as defined in
Section 2(d)(i)) subject to a Full Value Award. 
 (b) Incentive Stock Option Limit. Notwithstanding anything to the contrary in
Section 2(a) and subject to Section 6(a) regarding Capitalization Adjustments, the aggregate maximum number of shares of Common Stock that may be issued pursuant to the exercise of Incentive Stock Options is 37,400,000 shares. 

(c) Actions that Will Not Constitute Issuance of Shares and Will Not Reduce Share Reserve. The following actions will not result in an
issuance of shares of Common Stock under the Plan and accordingly will not reduce the number of shares of Common Stock subject to the Share Reserve and available for issuance under the Plan: (i) the expiration or termination of any portion of
an Award without the shares covered by such portion of the Award having been issued; or (ii) the settlement of any portion of an Award in cash (i.e., the Participant receives cash rather than shares of Common Stock). 

(d) Reversion of Shares to the Share Reserve. 

(i) Shares Available For Subsequent Issuance. If any shares of Common Stock issued pursuant to an Award are forfeited back to or
repurchased by the Company because of the failure to meet a contingency or condition required for the vesting of such shares, then such shares will revert to the Share Reserve and become available again for issuance under the Plan and, for purposes
of the Plan, such shares will be the “2018 Plan Returning Shares”. 
 (ii) Shares Not Available For Subsequent
Issuance. The following shares of Common Stock will not become available again for issuance under the Plan: (A) any shares that are reacquired or withheld (or not issued) by the Company to satisfy the exercise or purchase price of an
Appreciation Award or a Full Value Award (including any shares subject to such award that are not delivered because such award is exercised through a reduction of shares subject to such award (i.e., “net exercised”)); (B) any shares that
are reacquired or withheld (or not issued) by the Company to satisfy a tax withholding obligation in connection with an Appreciation Award or a Full Value Award; (C) any shares repurchased by the Company on the open market with the proceeds of
the exercise or purchase price of an Appreciation Award or a Full Value Award; and (D) in the event that a Stock Appreciation Right granted under the Plan or a stock appreciation right granted under any of the Prior Plans is settled in shares
of Common Stock, the gross number of shares of Common Stock subject to such award. 
 (e) Share Reserve Limit. For clarity, the Share
Reserve limit in Section 2(a) is a limit on the number of shares of Common Stock that may be issued pursuant to Awards and does not limit the granting of Awards, except that the Company will keep available at all times the number of shares of
Common Stock reasonably required to satisfy its obligations to issue shares pursuant to such Awards. Shares may be issued in connection with a merger or acquisition as permitted by, as applicable, Nasdaq Listing Rule 5635(c), NYSE Listed Company
Manual Section 303A.08, AMEX Company Guide Section 711 or other applicable rule, and such issuance will not reduce the number of shares available for issuance under the Plan. 

3. Eligibility. 
 (a) Eligibility for
Specific Awards. Incentive Stock Options may be granted only to Employees of the Company or a “parent corporation” or “subsidiary corporation” thereof (as such terms are defined in Sections 424(e) and (f) of the Code).
Awards other than Incentive Stock Options may be granted to Employees, Directors and Consultants; provided, however, that Nonstatutory Stock Options and SARs may not be granted to Employees, Directors and Consultants who are providing
Continuous Service only to any “parent” of the Company (as such term is defined in Rule 405) unless the stock underlying such Awards is treated as “service recipient stock” under Section 409A because the Awards are
granted pursuant to a corporate transaction (such as a spin off transaction) or unless such Awards otherwise comply with the distribution requirements of Section 409A. 

(b) Ten Percent Stockholders. A Ten Percent Stockholder may not be granted an Incentive Stock Option unless (i) the exercise price
of such Option is at least 110% of the Fair Market Value on the date of grant of such Option and (ii) the Option is not exercisable after the expiration of five years from the date of grant of such Option. 

4. Options and Stock Appreciation Rights. 

Each Option and SAR will have such terms and conditions as determined by the Board. Each Option will be designated in writing as an Incentive
Stock Option or Nonstatutory Stock Option at the time of grant; provided, however, that if an Option is not so designated, then such Option will be a Nonstatutory Stock Option, and the shares purchased upon exercise of each type of Option
will be separately accounted for. The terms and conditions of separate Options and SARs need not be identical; provided, however, that each Option Agreement and SAR Agreement will conform (through incorporation of provisions hereof by
reference in the Award Agreement or otherwise) to the substance of each of the following provisions: 
 (a) Term. Subject to
Section 3(b) regarding Ten Percent Stockholders, no Option or SAR will be exercisable after the expiration of ten years from the date of grant of such Award or such shorter period specified in the Award Agreement. 

  
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 (b) Exercise or Strike Price. Subject to Section 3(b) regarding Ten Percent
Stockholders, the exercise or strike price of each Option or SAR will not be less than 100% of the Fair Market Value on the date of grant of such Award. Notwithstanding the foregoing, an Option or SAR may be granted with an exercise or strike price
lower than 100% of the Fair Market Value on the date of grant of such Award if such Award is granted pursuant to an assumption of or substitution for another option or stock appreciation right pursuant to a Change in Control and in a manner
consistent with the provisions of Sections 409A and, if applicable, 424(a) of the Code. Each SAR will be denominated in shares of Common Stock equivalents. 

(c) Exercise Procedure and Payment of Exercise Price for Options. In order to exercise an Option, the Participant must provide notice
of exercise to the Plan Administrator in accordance with the procedures specified in the Option Agreement. The Board has the authority to grant Options that do not permit all of the following methods of payment (or otherwise restrict the ability to
use certain methods) and to grant Options that require the consent of the Company to utilize a particular method of payment. The exercise price of an Option may be paid, to the extent permitted by Applicable Law and as determined by the Board, by
one or more of the following methods of payment to the extent set forth in the Option Agreement: 
 (i) by cash or check, bank draft or
money order payable to the Company; 
 (ii) pursuant to a “cashless exercise” program developed under Regulation T as promulgated
by the Federal Reserve Board that, prior to the issuance of the Common Stock subject to the Option, results in either the receipt of cash (or check) by the Company or the receipt of irrevocable instructions to pay the exercise price to the Company
from the sales proceeds; 
 (iii) by delivery to the Company (either by actual delivery or attestation) of shares of Common Stock that are
already owned by the Participant free and clear of any liens, claims, encumbrances or security interests, with a Fair Market Value on the date of exercise that does not exceed the exercise price, provided that (A) at the time of exercise the
Common Stock is publicly traded, (B) any remaining balance of the exercise price not satisfied by such delivery is paid by the Participant in cash or other permitted form of payment, (C) such delivery would not violate any Applicable Law
or agreement restricting the redemption of the Common Stock, (D) any certificated shares are endorsed or accompanied by an executed assignment separate from certificate, and (E) such shares have been held by the Participant for any minimum
period necessary to avoid adverse accounting treatment as a result of such delivery; 
 (iv) if the Option is a Nonstatutory Stock Option,
by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Common Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value on the date of exercise that does not
exceed the exercise price, provided that (A) any remaining balance of the exercise price not satisfied by such net exercise is paid by the Participant in cash or other permitted form of payment, and (B) shares of Common Stock will no
longer be subject to such Option and will not be exercisable thereafter to the extent that shares issuable upon exercise are reduced to pay the exercise price pursuant to such “net exercise;” or 

(v) in any other form of consideration that may be acceptable to the Board and permissible under Applicable Law. 

(d) Exercise Procedure and Payment of Appreciation Distribution for SARs. In order to exercise any SAR, the Participant must provide
notice of exercise to the Plan Administrator in accordance with the SAR Agreement. The appreciation distribution payable to a Participant upon the exercise of a SAR will not be greater than an amount equal to the excess of (i) the aggregate
Fair Market Value on the date of exercise of a number of shares of Common Stock equal to the number of Common Stock equivalents that are vested and being exercised under such SAR, over (ii) the strike price of such SAR. Such appreciation
distribution may be paid to the Participant in the form of Common Stock or cash (or any combination of Common Stock and cash) or in any other form of payment, as determined by the Board and specified in the SAR Agreement. 

(e) Transferability. Options and SARs may not be transferred to third party financial institutions for value. The Board may impose such
additional limitations on the transferability of an Option or SAR. In the absence of any such determination, the following restrictions on the transferability of Options and SARs will apply, provided that except as explicitly provided herein,
neither an Option nor a SAR may be transferred for consideration and provided, further, that if an Option is an Incentive Stock Option, such Option may be deemed to be a Nonstatutory Stock Option as a result of such transfer: 

(i) Restrictions on Transfer. An Option or SAR will not be transferable, except by will or by the laws of descent and distribution, and
will be exercisable during the lifetime of the Participant only by the Participant; provided, however, that the Board may permit transfer of an Option or SAR in a manner that is not prohibited by applicable tax and securities laws upon the
Participant’s request, including to a trust if the Participant is considered to be the sole beneficial owner of such trust (as determined under Section 671 of the Code and applicable state law) while such Option or SAR is held in such
trust, provided that the Participant and the trustee enter into a transfer and other agreements required by the Company. 

  
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 (ii) Domestic Relations Orders. Notwithstanding the foregoing, subject to the
execution of transfer documentation in a format acceptable to the Company, an Option or SAR may be transferred pursuant to a domestic relations order. 

(f) Vesting. Subject to Section 10(a), the Board may impose such restrictions on or conditions to the vesting and/or
exercisability of an Option or SAR as determined by the Board and which may vary. Except as otherwise provided in the Award Agreement or other written agreement between a Participant and the Company or an Affiliate, vesting of Options and SARs will
cease upon termination of the Participant’s Continuous Service. 
 (g) Termination of Continuous Service. Subject to
Section 4(h), if a Participant’s Continuous Service terminates for any reason other than for Cause, the Participant may exercise his or her Option or SAR to the extent vested, but only within the following period of time or, if applicable,
such other period of time provided in the Award Agreement or other written agreement between a Participant and the Company or an Affiliate; provided, however, that in no event may such Award be exercised after the expiration of its maximum
term (as set forth in Section 4(a)): 
 (i) three months following the date of such termination if such termination is a termination
without Cause (other than any termination due to the Participant’s Disability or death); 
 (ii) 12 months following the date of such
termination if such termination is due to the Participant’s Disability; 
 (iii) 18 months following the date of such termination if
such termination is due to the Participant’s death; or 
 (iv) 18 months following the date of the Participant’s death if such
death occurs following the date of such termination but during the period such Award is otherwise exercisable (as provided in (i) or (ii) above). 

Following the date of such termination, to the extent the Participant does not exercise such Award within the applicable Post-Termination Exercise Period (or,
if earlier, prior to the expiration of the maximum term of such Award), such unexercised portion of the Award will terminate, and the Participant will have no further right, title or interest in the terminated Award, the shares of Common Stock
subject to the terminated Award, or any consideration in respect of the terminated Award. 
 (h) Extension of Exercisability. Except
as otherwise provided in the Award Agreement or other written agreement between a Participant and the Company or an Affiliate, if a Participant’s Continuous Service terminates for any reason other than for Cause and, at any time during the last
thirty days of the applicable Post-Termination Exercise Period: (i) the exercise of the Participant’s Option or SAR would be prohibited solely because the issuance of shares of Common Stock upon such exercise would violate Applicable Law,
or (ii) the immediate sale of any shares of Common Stock issued upon such exercise would violate the Company’s Trading Policy, then the applicable Post-Termination Exercise Period will be extended to the last day of the calendar month that
commences following the date the Award would otherwise expire, with an additional extension of the exercise period to the last day of the next calendar month to apply if any of the foregoing restrictions apply at any time during such extended
exercise period, generally without limitation as to the maximum permitted number of extensions); provided, however, that in no event may such Award be exercised after the expiration of its maximum term (as set forth in Section 4(a)).

 (i) Termination of Continuous Service for Cause. Except as explicitly otherwise provided in the Award Agreement or other written
agreement between a Participant and the Company or an Affiliate, if a Participant’s Continuous Service is terminated for Cause, the Participant’s Options and SARs will terminate and be forfeited immediately upon such termination of
Continuous Service, and the Participant will be prohibited from exercising any portion (including any vested portion) of such Awards on and after the date of such termination of Continuous Service and the Participant will have no further right,
title or interest in such forfeited Award, the shares of Common Stock subject to the forfeited Award, or any consideration in respect of the forfeited Award. 

(j) Non-Exempt Employees. No Option or SAR, whether or not vested, granted to an Employee who
is a non-exempt employee for purposes of the Fair Labor Standards Act of 1938, as amended, will be first exercisable for any shares of Common Stock until at least six months following the date of grant of such
Award. Notwithstanding the foregoing, in accordance with the provisions of the Worker Economic Opportunity Act, any vested portion of such Award may be exercised earlier than six months following the date of grant of such Award in the event of
(i) such Participant’s death or Disability, (ii) a Change in Control in which such Award is not assumed, continued or substituted, or (iii) such Participant’s retirement (as such term may be defined in the Award Agreement or
another applicable agreement or, in the absence of any such definition, in accordance with the Company’s then current employment policies and guidelines). This Section 4(j) is intended to operate so that any income derived by a non-exempt employee in connection with the exercise or vesting of an Option or SAR will be exempt from his or her regular rate of pay. 

(k) Whole Shares. Options and SARs may be exercised only with respect to whole shares of Common Stock or their equivalents. 

  
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 5. Awards Other Than Options and Stock Appreciation Rights. 

(a) Restricted Stock Awards and RSU Awards. Each Restricted Stock Award and RSU Award will have such terms and conditions as determined
by the Board. The terms and conditions of separate Restricted Stock Awards and RSU Awards need not be identical; provided, however, that each Restricted Stock Award Agreement and RSU Award Agreement will conform (through incorporation of the
provisions hereof by reference in the Award Agreement or otherwise) to the substance of each of the following provisions: 
 (i) Form of
Award. 
 (1) To the extent consistent with the Company’s Bylaws, at the Board’s election, shares of Common Stock subject to
a Restricted Stock Award may be (i) held in book entry form subject to the Company’s instructions until such shares become vested or any other restrictions lapse, or (ii) evidenced by a certificate, which certificate will be held in
such form and manner as determined by the Board. Unless otherwise determined by the Board, a Participant will have voting and other rights as a stockholder of the Company with respect to any shares subject to a Restricted Stock Award. 

(2) A RSU Award represents a Participant’s right to be issued on a future date the number of shares of Common Stock that is equal to the
number of restricted stock units subject to the RSU Award. As a holder of a RSU Award, a Participant is an unsecured creditor of the Company with respect to the Company’s unfunded obligation, if any, to issue shares of Common Stock in
settlement of such Award and nothing contained in the Plan or any RSU Award Agreement, and no action taken pursuant to its provisions, will create or be construed to create a trust of any kind or a fiduciary relationship between a Participant and
the Company or an Affiliate or any other person. A Participant will not have voting or any other rights as a stockholder of the Company with respect to any RSU Award (unless and until shares are actually issued in settlement of a vested RSU Award).

 (ii) Consideration. 

(1) A Restricted Stock Award may be granted in consideration for (A) cash or check, bank draft or money order payable to the Company,
(B) past services to the Company or an Affiliate, or (C) any other form of consideration (including future services) as the Board may determine and permissible under Applicable Law. 

(2) Unless otherwise determined by the Board at the time of grant, a RSU Award will be granted in consideration for the Participant’s
services to the Company or an Affiliate, such that the Participant will not be required to make any payment to the Company (other than such services) with respect to the grant or vesting of the RSU Award, or the issuance of any shares of Common
Stock pursuant to the RSU Award. If, at the time of grant, the Board determines that any consideration must be paid by the Participant (in a form other than the Participant’s services to the Company or an Affiliate) upon the issuance of any
shares of Common Stock in settlement of the RSU Award, such consideration may be paid in any form of consideration as the Board may determine and permissible under Applicable Law. 

(iii) Vesting. Subject to Section 10(a), the Board may impose such restrictions on or conditions to the vesting of a Restricted
Stock Award or RSU Award as determined by the Board and which may vary. Except as otherwise provided in the Award Agreement or other written agreement between a Participant and the Company or an Affiliate, vesting of Restricted Stock Awards and RSU
Awards will cease upon termination of the Participant’s Continuous Service. 
 (iv) Termination of Continuous Service. Except as
otherwise provided in the Award Agreement or other written agreement between a Participant and the Company or an Affiliate, if a Participant’s Continuous Service terminates for any reason, (i) the Company may receive through a forfeiture
condition or a repurchase right any or all of the shares of Common Stock held by the Participant under his or her Restricted Stock Award that have not vested as of the date of such termination as set forth in the Restricted Stock Award Agreement and
(ii) any portion of his or her RSU Award that has not vested will be forfeited upon such termination and the Participant will have no further right, title or interest in the RSU Award, the shares of Common Stock issuable pursuant to the RSU
Award, or any consideration in respect of the RSU Award. 
 (v) Settlement of RSU Awards. A RSU Award may be settled by the issuance
of shares of Common Stock or cash (or any combination thereof) or in any other form of payment, as determined by the Board and specified in the RSU Award Agreement. At the time of grant, the Board may determine to impose such restrictions or
conditions that delay such delivery to a date following the vesting of the RSU Award. 
 (b) Performance Awards. With respect to any
Performance Award, the length of any Performance Period, the Performance Goals to be achieved during the Performance Period, the other terms and conditions of such Award, and the measure of whether and to what degree such Performance Goals have been
attained will be determined by the Board. In addition, to the extent permitted by Applicable Law and set forth in the applicable Award Agreement, the Board may determine that cash may be used in payment of Performance Awards. 

(c) Other Awards. Other forms of Awards valued in whole or in part by reference to, or otherwise based on, Common Stock may be granted
either alone or in addition to Awards provided for under Section 4 and the preceding provisions of this Section 5. Subject to the provisions of the Plan, the Board will have sole and complete discretion to determine the persons to whom and
the time or times at which such Other Awards will be granted, the number of shares of Common Stock (or the cash equivalent thereof) to be granted pursuant to such Other Awards and all other terms and conditions of such Other Awards. 

  
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 6. Adjustments upon Changes in Common Stock; Other Corporate Events. 

(a) Capitalization Adjustments. In the event of a Capitalization Adjustment, the Board shall appropriately and proportionately adjust:
(i) the class(es) and maximum number of securities subject to the Plan pursuant to Section 2(a), (ii) the class(es) and maximum number of securities that may be issued pursuant to the exercise of Incentive Stock Options pursuant to
Section 2(b), (iii) the class(es) and number of securities to be granted pursuant to the Automatic Grant Program, and (iv) the class(es) and number of securities and exercise price, strike price or purchase price of stock subject to
outstanding Awards. The Board shall make such adjustments, and its determination shall be final, binding and conclusive. Notwithstanding the provisions of this Section 6(a), no fractional shares or rights for fractional shares of Common Stock
shall be created pursuant to this Section 6(a). The Board shall determine an equivalent benefit for any fractional shares or fractional shares that might be created by the adjustments referred to in this Section 6(a). 

(b) Dissolution or Liquidation. Except as otherwise provided in the Award Agreement, in the event of a dissolution or liquidation of
the Company, all outstanding Awards (other than Awards consisting of vested and outstanding shares of Common Stock not subject to a forfeiture condition or the Company’s right of repurchase) will terminate immediately prior to the completion of
such dissolution or liquidation, and the shares of Common Stock subject to the Company’s repurchase rights or subject to a forfeiture condition may be repurchased or reacquired by the Company notwithstanding the fact that the holder of such
Award is providing Continuous Service, provided, however, that the Board may determine to cause some or all Awards to become fully vested, exercisable and/or no longer subject to repurchase or forfeiture (to the extent such Awards have not
previously expired or terminated) before the dissolution or liquidation is completed but contingent on its completion. 
 (c) Change in
Control. The following provisions will apply to Awards in the event of a Change in Control unless otherwise provided in the instrument evidencing the Award or any other written agreement between the Company or any Affiliate and the Participant
or unless otherwise expressly provided by the Board at the time of grant of the Award. 
 (i) Awards May Be Assumed. In the event of
a Change in Control, any surviving corporation or acquiring corporation (or the surviving or acquiring corporation’s parent company) may assume or continue any or all Awards outstanding under the Plan or may substitute similar stock awards for
Awards outstanding under the Plan (including but not limited to, awards to acquire the same consideration paid to the stockholders of the Company pursuant to the Change in Control), and any reacquisition or repurchase rights held by the Company in
respect of Common Stock issued pursuant to Awards may be assigned by the Company to the successor of the Company (or the successor’s parent company, if any), in connection with such Change in Control. A surviving corporation or acquiring
corporation (or its parent) may choose to assume or continue only a portion of an Award or substitute a similar stock award for only a portion of a Award, or may choose to assume or continue the Awards held by some, but not all Participants. The
terms of any assumption, continuation or substitution will be set by the Board. 
 (ii) Awards Held by Current Eligible Participants.
In the event of a Change in Control in which the surviving corporation or acquiring corporation (or its parent company) does not assume or continue such outstanding Awards or substitute similar awards for such outstanding Awards, then with respect
to Awards that have not been assumed, continued or substituted and that are held by Participants who are Employees or Directors and whose Continuous Service has not terminated prior to the effective time of the Change in Control (referred to as the
“Current Eligible Participants”), the vesting of such Awards (and, with respect to Options and Stock Appreciation Rights, the time when such Awards may be exercised) will be accelerated in full to a date prior to the
effective time of such Change in Control (contingent upon the effectiveness of the Change in Control) as the Board determines (or, if the Board does not determine such a date, to the date that is five (5) days prior to the effective time of the
Change in Control), and such Awards will terminate if not exercised (if applicable) at or prior to the effective time of the Change in Control, and any reacquisition or repurchase rights held by the Company with respect to such Awards will lapse
(contingent upon the effectiveness of the Change in Control). 
 (iii) Awards Held by Persons other than Current Eligible
Participants. In the event of a Change in Control in which the surviving corporation or acquiring corporation (or its parent company) does not assume or continue such outstanding Awards or substitute similar stock awards for such outstanding
Awards, then with respect to Awards that have not been assumed, continued or substituted and that are held by persons other than Current Eligible Participants, such Awards will terminate if not exercised (if applicable) prior to the effective time
of the Change in Control; provided, however, that any reacquisition or repurchase rights held by the Company with respect to such Awards will not terminate and may continue to be exercised notwithstanding the Change in Control. 

(iv) Payment for Awards in Lieu of Exercise. Notwithstanding the foregoing, in the event a Award will terminate if not exercised prior
to the effective time of a Change in Control, the Board may provide, in its sole discretion, that the holder of such Award may not exercise such Award but will receive a payment, in such form as may be determined by the Board, equal in value, at the
effective time, to the excess, if any, of (A) the value of the property the Participant would have received upon the exercise of the Award (including, at the discretion of the Board, any unvested portion of such Award), over (B) any
exercise price payable by such holder in connection with such exercise. 

  
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 (d) Appointment of Stockholder Representative. As a condition to the receipt of an
Award under this Plan, a Participant will be deemed to have agreed that the Award will be subject to the terms of any agreement governing a Change in Control involving the Company, including, without limitation, a provision for the appointment of a
stockholder representative that is authorized to act on the Participant’s behalf with respect to any escrow, indemnities and any contingent consideration. 

(e) No Restriction on Right to Undertake Transactions. The grant of any Award under the Plan and the issuance of shares pursuant to any
Award does not affect or restrict in any way the right or power of the Company or the stockholders of the Company to make or authorize any adjustment, recapitalization, reorganization or other change in the Company’s capital structure or its
business, any merger or consolidation of the Company, any issue of stock or of options, rights or options to purchase stock or of bonds, debentures, preferred or prior preference stocks whose rights are superior to or affect the Common Stock or the
rights thereof or which are convertible into or exchangeable for Common Stock, or the dissolution or liquidation of the Company, or any sale or transfer of all or any part of its assets or business, or any other corporate act or proceeding, whether
of a similar character or otherwise. 
 7. Automatic Grants To Eligible Directors. 

(a) General. The Automatic Grant Program set forth in this Section 7 provides that Eligible Directors shall automatically receive
the grant of certain Awards at designated intervals over their period of Continuous Service on the Board. For the avoidance of doubt, Awards granted under this Automatic Grant Program are subject to all the terms and conditions of the Plan. Each
Option granted under this Automatic Grant Program shall (i) be a Nonstatutory Stock Option, (ii) have an exercise price equal to one hundred percent (100%) of the Fair Market Value on the date the Option is granted, and (iii) have a
maximum term of 10 years. For the avoidance of doubt, any shares of Common Stock issued pursuant to Awards granted under the Automatic Grant Program which may vest any earlier than 12 months following the date of grant will count against the 5%
permitted exception to the minimum vesting requirements set forth in Section 10(a). 
 (b) Initial Awards. If an Eligible
Director is first elected or appointed to serve on the Board on or after the Annual Meeting in 2020, such person shall, upon the date of his or her initial election or appointment as an Eligible Director, be granted an Option to purchase 30,000
shares of Common Stock and a RSU Award in respect of 15,000 shares of Common Stock (each such Option and RSU Award an “Initial Award”). Initial Awards of Options shall vest monthly with respect to 1/36th of the shares over
the three year period following the date of grant, subject to the Eligible Director’s Continuous Service through the applicable vesting dates, so that the Option will be fully vested on the third anniversary of the date of grant. Initial Awards
of RSU Awards shall vest annually with respect to 1/3rd of the shares over the three year period following the date of grant, subject to the Eligible Director’s Continuous Service through the applicable vesting dates, so that the RSU Award is
fully vested on the third anniversary of the date of grant. 
 (c) Annual Awards. Each person who is an Eligible Director shall be
granted an Option to purchase 20,000 shares of Common Stock and a RSU Award in respect of 10,000 shares of Common Stock (each such Option and RSU Award, an “Annual Award”) on an annual basis as follows: (i) with respect
to 2020, such Annual Awards shall be granted on the date of the Annual Meeting in 2020; and (ii) with respect to each year following 2020, such Annual Awards shall be granted on the 25th day of February of such year (or if such 25th day is not
a trading day, the immediately preceding trading day in February); in each case, provided that such person is an Eligible Director on the date of grant, has served as an Eligible Director for a period of at least three months prior to the date of
grant, and will continue serving as an Eligible Director immediately after the date of grant. Annual Awards of Options shall vest monthly with respect to 1/12th of the shares over the one (1) year period following the date of grant, subject to
the Eligible Director’s Continuous Service through the applicable vesting dates, so that the Option will be fully vested on the first anniversary of the date of grant. Annual Awards of RSU Awards granted in 2020 shall fully vest on the earlier
of (i) the first anniversary of the date of grant or (ii) the day prior to the next Annual Meeting, subject to the Eligible Director’s Continuous Service through such date. Annual Awards of RSU Awards granted in each year following
2020 shall fully vest on the first anniversary of the date of grant, subject to the Eligible Director’s Continuous Service through such date. 

(d) Vesting Upon Change in Control or Hostile Take-Over. Each Option and RSU Award granted pursuant to this Automatic Grant Program
shall automatically fully accelerate vesting immediately prior to the effectiveness of a Change in Control or Hostile Take-Over, subject to the Eligible Director’s Continuous Service through the date of the Change in Control or Hostile
Take-Over, as applicable. 
 (e) Vesting Upon Death or Disability. If the Eligible Director’s Continuous Service terminates due
to death or Disability, such Eligible Director’s Options and RSU Awards granted pursuant to this Automatic Grant Program shall automatically fully vest. 

  
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 8. Administration. 

(a) Administration by Board. The Board will administer the Plan unless and until the Board delegates administration of the Plan to a
Committee or Committees, as provided in Section 8(d). 
 (b) Powers of Board. Except with respect to the Automatic Grant
Program, the Board shall have the power, subject to, and within the limitations of, the express provisions of the Plan: 
 (i) To determine
from time to time (A) which of the persons eligible under the Plan will be granted Awards; (B) when and how each Award will be granted; (C) what type or combination of types of Award will be granted; (D) the provisions of each
Award granted (which need not be identical), including the time or times when a person will be permitted to receive cash or Common Stock pursuant to an Award; (E) the number of shares of Common Stock with respect to which an Award will be
granted to each such person; and (F) the Fair Market Value applicable to an Award. 
 (ii) To construe and interpret the Plan and
Awards granted under it, and to establish, amend and revoke rules and regulations for its administration. The Board, in the exercise of this power, may correct any defect, omission or inconsistency in the Plan or in any Award Agreement in a manner
and to the extent it deems necessary or expedient to make the Plan or Award fully effective. 
 (iii) To settle all controversies regarding
the Plan and Awards granted under it. 
 (iv) To accelerate the time at which an Award may first be exercised or the time during which an
Award or any part thereof will vest, notwithstanding the provisions in the Award Agreement stating the time at which it may first be exercised or the time during which it will vest, including in connection with a Change in Control or Hostile
Take-Over. 
 (v) To prohibit the exercise of any Option, SAR or other exercisable Award during a period of up to thirty days prior to the
consummation of any pending stock dividend, stock split, combination or exchange of shares, merger, consolidation or other distribution (other than normal cash dividends) of Company assets to stockholders, or any other change affecting the shares of
Common Stock or the share price of the Common Stock including any Change in Control, for reasons of administrative convenience. 
 (vi) To
suspend or terminate the Plan at any time. Suspension or termination of the Plan will not impair rights and obligations under any Award granted while the Plan is in effect except with the written consent of the affected Participant. 

(vii) To amend the Plan in any respect the Board deems necessary or advisable, provided that stockholder approval will be required to the
extent required by Applicable Law. Except as provided above, rights under any Award granted before amendment of the Plan will not be impaired by any amendment of the Plan unless (1) the Company requests the consent of the affected Participant,
and (2) such Participant consents in writing. 
 (viii) To submit any amendment to the Plan for stockholder approval. 

(ix) To approve forms of Award Agreements for use under the Plan and to amend the terms of any one or more Awards, including, but not limited
to, amendments to provide terms more favorable to the Participant than previously provided in the Award Agreement, subject to any specified limits in the Plan that are not subject to Board discretion; provided, however, that except with
respect to amendments that disqualify or impair the status of an Incentive Stock Option, a Participant’s rights under any Award will not be impaired by any such amendment unless (A) the Company requests the consent of the affected
Participant, and (B) such Participant consents in writing. Notwithstanding the foregoing, (1) a Participant’s rights will not be deemed to have been impaired by any such amendment if the Board, in its sole discretion, determines that
the amendment, taken as a whole, does not materially impair the Participant’s rights, including, but not limited, to, an amendment that imposes reasonable restrictions on the minimum number of shares subject to an Option that may be exercised,
and (2) subject to the limitations of Applicable Law, if any, the Board may amend the terms of any one or more Awards without the affected Participant’s consent (A) to maintain the qualified status of the Award as an Incentive Stock
Option under Section 422 of the Code; (B) to change the terms of an Incentive Stock Option, if such change results in impairment of the Award solely because it impairs the qualified status of the Award as an Incentive Stock Option under
Section 422 of the Code; (C) to clarify the manner of exemption from, or to bring the Award into compliance with or qualify it for an exemption from, Section 409A; or (D) to comply with other Applicable Laws. 

(x) Generally, to exercise such powers and to perform such acts as the Board deems necessary or expedient to promote the best interests of the
Company and that are not in conflict with the provisions of the Plan or Awards. 
 (xi) To adopt such procedures and sub-plans as are necessary or appropriate to permit participation in the Plan by Employees, Directors or Consultants who are foreign nationals or employed outside the United States. 

(c) Administration of Automatic Grant Program. The Board shall have the power, subject to and within the limitations of, the express
provisions of the Automatic Grant Program: 

  
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 (i) To determine the provisions of each Award to the extent not specified in the Automatic
Grant Program. 
 (ii) To construe and interpret the Automatic Grant Program and the Awards granted under it, and to establish, amend and
revoke rules and regulations for its administration. The Board, in the exercise of this power, may correct any defect, omission or inconsistency in the Automatic Grant Program or in any Award Agreement, in a manner and to the extent it shall deem
necessary or expedient to make the Automatic Grant Program fully effective. 
 (iii) To amend the terms of the Automatic Grant Program or an
Award granted thereunder, except that rights under any such Award granted before amendment of the Automatic Grant Program shall not be impaired by any amendment of the Automatic Grant Program unless (1) the Company requests the consent of the
affected Participant, and (2) such Participant consents in writing. 
 (iv) Generally, to exercise such powers and to perform such acts
as the Board deems necessary or expedient to promote the best interests of the Company and that are not in conflict with the provisions of the Automatic Grant Program. 

(d) Delegation to Committee. 

(i) General. The Board may delegate some or all of the administration of the Plan (except the Automatic Grant Program) to a Committee or
Committees. If administration of the Plan is delegated to a Committee, the Committee will have, in connection with the administration of the Plan, the powers theretofore possessed by the Board that have been delegated to the Committee, including the
power to delegate to a subcommittee of the Committee any of the administrative powers the Committee is authorized to exercise (and references in this Plan to the Board will thereafter be to the Committee or subcommittee), subject, however, to such
resolutions, not inconsistent with the provisions of the Plan, as may be adopted from time to time by the Board. The Committee may, at any time, abolish the subcommittee and/or revest in the Committee any powers delegated to the subcommittee. The
Board may retain the authority to concurrently administer the Plan with the Committee and may, at any time, revest in the Board some or all of the powers previously delegated. As of the Effective Date the Board has delegated administration of the
Plan to the Compensation Committee. 
 (ii) Rule 16b-3 Compliance. The Committee may consist
solely of two or more Non-Employee Directors, in accordance with Rule 16b-3. In addition, the Board or the Committee, in its sole discretion, may delegate to a Committee
who need not be Non-Employee Directors the authority to grant Awards to eligible persons who are not then subject to Section 16 of the Exchange Act. 

(e) Effect of Board’s Decision. All determinations, interpretations and constructions made by the Board or any Committee in good
faith will not be subject to review by any person and will be final, binding and conclusive on all persons. 
 (f) Cancellation and Re-Grant of Awards. Neither the Board nor any Committee will have the authority to: (i) reduce the exercise price or strike price of any outstanding Options or SARs under the Plan, or (ii) cancel any
outstanding Options or SARs that have an exercise price or strike price greater than the current Fair Market Value in exchange for cash or other Awards under the Plan, unless the stockholders of the Company have approved such an action within twelve
months prior to such an event. 
 (g) Delegation to an Officer. The Board or any Committee may delegate to one or more Officers the
authority to do one or both of the following (i) designate Employees who are not Officers to be recipients of Options and SARs (and, to the extent permitted by Applicable Law, other Awards) and, to the extent permitted by Applicable Law, the
terms thereof, and (ii) determine the number of shares of Common Stock to be subject to such Awards granted to such Employees; provided, however, that the resolutions evidencing such delegation will specify the total number of shares of
Common Stock that may be subject to the Awards granted by such Officer and that such Officer may not grant an Award to himself or herself. Any such Awards will be granted on the form of Award Agreement most recently approved for use by the Board or
the Committee, unless otherwise provided in the resolutions approving the delegation authority. Notwithstanding anything to the contrary herein, neither the Board nor any Committee may delegate to an Officer who is acting solely in the capacity of
an Officer (and not also as a Director) the authority to determine the Fair Market Value. 
 9. Tax Withholding 

(a) Withholding Authorization. As a condition to acceptance of any Award under the Plan, a Participant authorizes withholding from
payroll and any other amounts payable to such Participant, and otherwise agree to make adequate provision for (including), any sums required to satisfy the federal, state, local and foreign tax withholding obligations of the Company or an Affiliate,
if any, which arise in connection with the exercise, vesting or settlement of such Award, as applicable. Accordingly, a Participant may not be able to exercise an Award even though the Award is vested, and the Company shall have no obligation to
issue shares of Common Stock subject to an Award, unless and until such obligations are satisfied. 
 (b) Satisfaction of Withholding
Obligation. To the extent permitted by the terms of an Award Agreement, the Company may, in its sole discretion, satisfy any federal, state, local or foreign tax withholding obligation relating to an Award by any of the following means or by a
combination of such means: (i) causing the Participant to tender a cash payment; (ii) withholding shares of Common Stock from the shares of Common Stock issued or otherwise issuable to the Participant in connection with the


  
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Award; (iii) withholding cash from an Award settled in cash; (iv) withholding payment from any amounts otherwise payable to the Participant; (v) by means of a “cashless
exercise” pursuant to a program developed under Regulation T as promulgated by the Federal Reserve Board; or (vi) by such other method as may be set forth in the Award Agreement. 

(c) Withholding Indemnification. As a condition to accepting an Award under the Plan, in the event that the amount of the
Company’s withholding obligation in connection with such Award was greater than the amount actually withheld by the Company, each Participant agrees to indemnify and hold the Company harmless from any failure by the Company to withhold the
proper amount. 
 10. Miscellaneous. 

(a) Minimum Vesting Requirements. No Award may vest (or, if applicable, be exercisable) until at least twelve (12) months following
the date of grant of the Award; provided, however, that shares of Common Stock up to five percent (5%) of the Share Reserve may be issued pursuant to Awards that do not meet such vesting (and, if applicable, exercisability) requirements. 

(b) Dividends and Dividend Equivalents. 

(i) Dividends or dividend equivalents may not be paid or credited to Options or SARs. 

(ii) With respect to any Award other than an Option or SAR, dividends or dividend equivalents may be paid or credited, as applicable, with
respect to any shares of Common Stock subject to such Award, as determined by the Board and specified in the applicable Award Agreement; provided, however, that (i) no dividends or dividend equivalents may be paid with respect to any
such shares before the date such shares have vested under the terms of such Award Agreement, (ii) any dividends or dividend equivalents that are credited with respect to any such shares will be subject to all of the terms and conditions
applicable to such shares under the terms of such Award Agreement (including, but not limited to, any vesting conditions), and (iii) any dividends or dividend equivalents that are credited with respect to any such shares will be forfeited to
the Company on the date, if any, such shares are forfeited to or repurchased by the Company due to a failure to meet any vesting conditions under the terms of such Award Agreement. 

(c) Source of Shares. The stock issuable under the Plan will be shares of authorized but unissued or reacquired Common Stock, including
shares repurchased by the Company on the open market or otherwise. 
 (d) Use of Proceeds from Sales of Common Stock. Proceeds from
the sale of shares of Common Stock pursuant to Awards will constitute general funds of the Company. 
 (e) Corporate Action Constituting
Grant of Awards. Corporate action constituting a grant by the Company of an Award to any Participant will be deemed completed as of the date of such corporate action, unless otherwise determined by the Board, regardless of when the instrument,
certificate, or letter evidencing the Award is communicated to, or actually received or accepted by, the Participant. In the event that the corporate records (e.g., Board consents, resolutions or minutes) documenting the corporate action approving
the grant contain terms (e.g., exercise price, vesting schedule or number of shares) that are inconsistent with those in the Award Agreement or related grant documents as a result of a clerical error in the papering of the Award Agreement or related
grant documents, the corporate records will control and the Participant will have no legally binding right to the incorrect term in the Award Agreement or related grant documents. 

(f) Stockholder Rights. No Participant will be deemed to be the holder of, or to have any of the rights of a holder with respect to,
any shares of Common Stock subject to such Award unless and until (i) such Participant has satisfied all requirements for exercise of the Award pursuant to its terms, if applicable, and (ii) the issuance of the Common Stock subject to such
Award is reflected in the records of the Company. 
 (g) No Employment or Other Service Rights. Nothing in the Plan, any Award
Agreement or any other instrument executed thereunder or in connection with any Award granted pursuant thereto will confer upon any Participant any right to continue to serve the Company or an Affiliate in the capacity in effect at the time the
Award was granted or affect the right of the Company or an Affiliate to terminate at will and without regard to any future vesting opportunity that a Participant may have with respect to any Award (i) the employment of an Employee with or
without notice and with or without cause, (ii) the service of a Consultant pursuant to the terms of such Consultant’s agreement with the Company or an Affiliate, or (iii) the service of a Director pursuant to the Bylaws of the Company
or an Affiliate, and any applicable provisions of the corporate law of the state in which the Company or the Affiliate is incorporated, as the case may be. Further, nothing in the Plan, any Award Agreement or any other instrument executed thereunder
or in connection with any Award will constitute any promise or commitment by the Company or an Affiliate regarding the fact or nature of future positions, future work assignments, future compensation or any other term or condition of employment or
service or confer any right or benefit under the Award or the Plan unless such right or benefit has specifically accrued under the terms of the Award Agreement and/or Plan. 

(h) Change in Time Commitment. In the event a Participant’s regular level of time commitment in the performance of his or her
services for the Company and any Affiliates is reduced (for example, and without limitation, if the Participant is an Employee of the Company and the Employee has a change in status from a full-time Employee to a part-time Employee or takes


  
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an extended leave of absence) after the date of grant of any Award to the Participant, the Board may determine, to the extent permitted by Applicable Law, to (x) make a corresponding
reduction in the number of shares or cash amount subject to any portion of such Award that is scheduled to vest or become payable after the date of such change in time commitment, and (y) in lieu of or in combination with such a reduction,
extend the vesting or payment schedule applicable to such Award. In the event of any such reduction, the Participant will have no right with respect to any portion of the Award that is so reduced or extended. 

(i) Incentive Stock Option $100,000 Limitation. To the extent that the aggregate Fair Market Value (determined at the time of grant) of
Common Stock with respect to which Incentive Stock Options are exercisable for the first time by any Optionholder during any calendar year (under all plans of the Company and any Affiliates) exceeds $100,000 (or such other limit established in the
Code) or otherwise does not comply with the rules governing Incentive Stock Options, the Options or portions thereof that exceed such limit (according to the order in which they were granted) or otherwise do not comply with such rules will be
treated as Nonstatutory Stock Options, notwithstanding any contrary provision of the applicable Option Agreement(s). 
 (j) Execution of
Additional Documents. As a condition to accepting an Award under the Plan, the Participant agrees to execute any additional documents or instruments necessary or desirable, as determined in the Plan Administrator’s sole discretion, to carry
out the purposes or intent of the Award, or facilitate compliance with securities and/or other regulatory requirements, in each case at the Plan Administrator’s request. 

(k) Electronic Delivery and Participation. Any reference herein or in an Award Agreement to a “written” agreement or document
will include any agreement or document delivered electronically, filed publicly at www.sec.gov (or any successor website thereto) or posted on the Company’s intranet (or other shared electronic medium controlled by the Company to which the
Participant has access). By accepting any Award the Participant consents to receive documents by electronic delivery and to participate in the Plan through any on-line electronic system established and
maintained by the Plan Administrator or another third party selected by the Plan Administrator. The form of delivery of any Common Stock (e.g., a stock certificate or electronic entry evidencing such shares) shall be determined by the
Company. 
 (l) Clawback/Recovery. All Awards granted under the Plan will be subject to recoupment in accordance with any clawback
policy that the Company is required to adopt pursuant to the listing standards of any national securities exchange or association on which the Company’s securities are listed or as is otherwise required by the Dodd-Frank Wall Street Reform and
Consumer Protection Act or other Applicable Law, and any other clawback policy that the Company adopts. In addition, the Board may impose such other clawback, recovery or recoupment provisions in an Award Agreement as the Board determines necessary
or appropriate, including but not limited to a reacquisition right in respect of previously acquired shares of Common Stock or other cash or property upon the occurrence of Cause. No recovery of compensation under such a clawback policy will be an
event giving rise to a Participant’s right to voluntary terminate employment upon a “resignation for good reason,” or for a “constructive termination” or any similar term under any plan of or agreement with the Company. 

(m) Securities Law Compliance. A Participant will not be issued any shares in respect of an Award unless either (i) the shares are
registered under the Securities Act; or (ii) the Company has determined that such issuance would be exempt from the registration requirements of the Securities Act. Each Award also must comply with other Applicable Law governing the Award, and
a Participant will not receive such shares if the Company determines that such receipt would not be in material compliance with Applicable Law. 

(n) Transfer or Assignment of Awards; Issued Shares. Except as expressly provided in the Plan or the form of Award Agreement, Awards
granted under the Plan may not be transferred or assigned by the Participant. After the vested shares subject to an Award have been issued, or in the case of Restricted Stock and similar awards, after the issued shares have vested, the holder of
such shares is free to assign, hypothecate, donate, encumber or otherwise dispose of any interest in such shares provided that any such actions are in compliance with the provisions herein, the terms of the Trading Policy and Applicable Law. 

(o) Effect on Other Employee Benefit Plans. The value of any Award granted under the Plan, as determined upon grant, vesting or
settlement, shall not be included as compensation, earnings, salaries, or other similar terms used when calculating any Participant’s benefits under any employee benefit plan sponsored by the Company or any Affiliate, except as such plan
otherwise expressly provides. The Company expressly reserves its rights to amend, modify, or terminate any of the Company’s or any Affiliate’s employee benefit plans. 

(p) Deferrals. To the extent permitted by Applicable Law, the Board, in its sole discretion, may determine that the delivery of Common
Stock or the payment of cash, upon the exercise, vesting or settlement of all or a portion of any Award may be deferred and may also establish programs and procedures for deferral elections to be made by Participants. Deferrals by will be made in
accordance with the requirements of Section 409A. 
 (q) Section 409A. Unless otherwise expressly provided for in an Award
Agreement, the Plan and Award Agreements will be interpreted to the greatest extent possible in a manner that makes the Plan and the Awards granted hereunder exempt from Section 409A, and, to the extent not so exempt, in compliance with the
requirements of Section 409A. If the Board determines that any Award granted hereunder is not exempt from and is therefore subject to Section 409A, the Award Agreement evidencing 

  
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such Award will incorporate the terms and conditions necessary to avoid the consequences specified in Section 409A(a)(1) of the Code, and to the extent an Award Agreement is silent on terms
necessary for compliance, such terms are hereby incorporated by reference into the Award Agreement. Notwithstanding anything to the contrary in this Plan (and unless the Award Agreement specifically provides otherwise), if the shares of Common Stock
are publicly traded, and if a Participant holding an Award that constitutes “deferred compensation” under Section 409A is a “specified employee” for purposes of Section 409A, no distribution or payment of any amount
that is due because of a “separation from service” (as defined in Section 409A without regard to alternative definitions thereunder) will be issued or paid before the date that is six months and one day following the date of such
Participant’s “separation from service” or, if earlier, the date of the Participant’s death, unless such distribution or payment can be made in a manner that complies with Section 409A, and any amounts so deferred will be
paid in a lump sum on the day after such six month period elapses, with the balance paid thereafter on the original schedule. 
 (r) Data
Privacy. By accepting an Award granted under the Plan, a Participant thereby explicitly and unambiguously consents to the collection, use and transfer, in electronic or other form, of such Participant’s personal data as described herein by
and among, as applicable, the Employer, and the Company and its other Affiliates and the Plan Administrator for the exclusive purpose of implementing, administering and managing such Participant’s participation in the Plan. Each Participant
understands that the Company and the Employer may hold certain personal information about such Participant, including, but not limited to, the Participant’s name, home address and telephone number, date of birth, social insurance number or
other identification number, salary, nationality, job title, any shares of stock or directorships held in the Company, details of all Awards or any other entitlement to ordinary shares awarded, canceled, exercised, vested, unvested or outstanding in
the Participant’s favor, for the purpose of implementing, administering and managing the Plan (the “Data”). Each Participant understands that Data may be transferred to any third parties assisting in the implementation,
administration and management of the Plan, that these recipients may be located in the Participant’s country or elsewhere, and that the recipients’ country (e.g., the United States) may have different data privacy laws and
protections than the Participant’s country. Each Participant understands that such Participant may request a list with the names and addresses of any potential recipients of the Data by contacting the Participant’s local human resources
representative. Each Participant authorizes the recipients to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purpose of implementing, administering and managing the Participant’s participation in
the Plan, including any requisite transfer of such Data as may be required to a broker or other third party with whom such Participant may elect to deposit any ordinary shares acquired pursuant to an Award. Each Participant understands that Data
will be held only as long as is necessary to implement, administer and manage such Participant’s participation in the Plan. Each Participant understands that such Participant may, at any time, view Data, request additional information about the
storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, without cost, by contacting in writing such Participant’s local human resources representative. Each Participant understands,
however, that refusing or withdrawing such Participant’s consent may affect such Participant’s ability to participate in the Plan. For more information on the consequences of refusal to consent or withdrawal of consent, each Participant
understands that such Participant may contact his or her local human resources representative. 
 (s) Choice of Law. This Plan and
any controversy arising out of or relating to this Plan shall be governed by, and construed in accordance with, the internal laws of the State of California, without regard to conflict of law principles that would result in any application of any
law other than the law of the State of California. 
 11. Covenants of the Company. 

(a) Securities Law Compliance. The Company will seek to obtain from each regulatory commission or agency having jurisdiction over the
Plan such authority as may be required to grant Awards and to issue and sell shares of Common Stock upon exercise of the Awards; provided, however, that this undertaking will not require the Company to register under the Securities Act the
Plan, any Award or any Common Stock issued or issuable pursuant to any such Award. If, after reasonable efforts, the Company is unable to obtain from any such regulatory commission or agency the authority that counsel for the Company deems necessary
for the lawful issuance and sale of Common Stock under the Plan, the Company will be relieved from any liability for failure to issue and sell Common Stock upon exercise of such Awards unless and until such authority is obtained. A Participant is
not eligible for the grant of an Award or the subsequent issuance of Common Stock pursuant to the Award if such grant or issuance would be in violation of any Applicable Law. 

(b) No Obligation to Notify or Minimize Taxes; No Liability for Taxes. The Company has no duty or obligation to any Participant to
advise such holder as to the time or manner of exercising such Award. Furthermore, the Company has no duty or obligation to warn or otherwise advise such holder of a pending termination or expiration of an Award or a possible period in which the
Award may not be exercised. The Company has no duty or obligation to minimize the tax consequences of an Award to the holder of such Award and will not be liable to any holder of an Award for any adverse tax consequences to such holder in connection
with an Award. As a condition to accepting an Award under the Plan, each Participant (i) agrees to not make any claim against the Company, or any of its Officers, Directors, Employees or Affiliates related to tax liabilities arising from such
Award or other Company compensation and (ii) acknowledges that such Participant was advised to consult with his or her own personal tax, financial and other legal advisors regarding the tax consequences of the Award and has either done so or
knowingly and 

  
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voluntarily declined to do so. Additionally, each Participant acknowledges any Option or SAR granted under the Plan is exempt from Section 409A only if the exercise or strike price is at
least equal to the “fair market value” of the Common Stock on the date of grant as determined by the Internal Revenue Service and there is no other impermissible deferral of compensation associated with the Award. Additionally, as a
condition to accepting an Option or SAR granted under the Plan, each Participant agrees not make any claim against the Company, or any of its Officers, Directors, Employees or Affiliates in the event that the Internal Revenue Service asserts that
such exercise price or strike price is less than the “fair market value” of the Common Stock on the date of grant as subsequently determined by the Internal Revenue Service. 

12. Additional Rules for Awards Subject to Section 409A. 

(a) Application. Unless the provisions of this Section 12 of the Plan are expressly superseded by the provisions in the form of
Award Agreement, the provisions of this Section 12 shall apply and shall supersede anything to the contrary set forth in the Award Agreement for a Non-Exempt Award. 

(b) Non-Exempt Awards Subject to Non-Exempt Severance
Arrangements. To the extent a Non-Exempt Award is subject to Section 409A due to application of a Non-Exempt Severance Arrangement, the following provisions of
Section 12(b) apply. 
 (i) If the Non-Exempt Award vests in the ordinary course during the
Participant’s Continuous Service in accordance with the vesting schedule set forth in the Award Agreement, and does not accelerate vesting under the terms of a Non-Exempt Severance Arrangement, in no
event will the shares be issued in respect of such Non-Exempt Award any later than the later of: (i) December 31st of the calendar year that includes the applicable vesting date, or (ii) the 60th day
that follows the applicable vesting date. 
 (ii) If vesting of the Non-Exempt Award accelerates
under the terms of a Non-Exempt Severance Arrangement in connection with the Participant’s Separation from Service, and such vesting acceleration provisions were in effect as of the date of grant of the Non-Exempt Award and, therefore, are part of the terms of such Non-Exempt Award as of the date of grant, then the shares will be earlier issued in settlement of such Non-Exempt Award upon the Participant’s Separation from Service in accordance with the terms of the Non-Exempt Severance Arrangement, but in no event later than the 60th day that follows the date of the Participant’s Separation from Service. However, if at the time the shares would otherwise be issued the Participant is subject to the distribution
limitations contained in Section 409A applicable to “specified employees,” as defined in Section 409A(a)(2)(B)(i) of the Code, such shares shall not be issued before the date that is six months following the date of such
Participant’s Separation from Service, or, if earlier, the date of the Participant’s death that occurs within such six month period. 

(iii) If vesting of a Non-Exempt Award accelerates under the terms of a
Non-Exempt Severance Arrangement in connection with a Participant’s Separation from Service, and such vesting acceleration provisions were not in effect as of the date of grant of the Non-Exempt Award
and, therefore, are not a part of the terms of such Non-Exempt Award on the date of grant, then such acceleration of vesting of the Non-Exempt Award shall not accelerate
the issuance date of the shares, but the shares shall instead be issued on the same schedule as set forth in the Grant Notice as if they had vested in the ordinary course during the Participant’s Continuous Service, notwithstanding the vesting
acceleration of the Non-Exempt Award. Such issuance schedule is intended to satisfy the requirements of payment on a specified date or pursuant to a fixed schedule, as provided under Treasury Regulations Section 1.409A-3(a)(4). 
 (c) Treatment of Non-Exempt
Awards Upon a Change in Control for Employees and Consultants. The provisions of this Section 12(c) shall apply and shall supersede anything to the contrary set forth in the Plan with respect to the permitted treatment of any Non-Exempt Award in connection with a Change in Control if the Participant was either an Employee or Consultant upon the applicable date of grant of the Non-Exempt Award. 

(i) Vested Non-Exempt Awards: The following provisions shall apply to any Vested Non-Exempt Award in connection with a Change in Control: 
 (1) If the Change in Control is also a
Section 409A Change of Control, then the Acquiring Entity may not assume, continue or substitute the Vested Non-Exempt Award. Upon the Section 409A Change of Control the settlement of the Vested Non-Exempt Award will automatically be accelerated and the shares will be immediately issued in respect of the Vested Non-Exempt Award. Alternatively, the Company may instead
provide that the Participant will receive a cash settlement equal to the Fair Market Value of the shares that would otherwise be issued to the Participant upon the Section 409A Change of Control. 

(2) If the Change in Control is not also a Section 409A Change of Control, then the Acquiring Entity must either assume, continue or
substitute each Vested Non-Exempt Award. The shares to be issued in respect of the Vested Non-Exempt Award shall be issued to the Participant by the Acquiring Entity on
the same schedule that the shares would have been issued to the Participant if the Change in Control had not occurred. In the Acquiring Entity’s discretion, in lieu of an issuance of shares, the Acquiring Entity may instead substitute a cash
payment on each applicable issuance date, equal to the Fair Market Value of the shares that would otherwise be issued to the Participant on such issuance dates, with the determination of the Fair Market Value of the shares made on the date of the
Change in Control. 

  
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 (ii) Unvested Non-Exempt Awards. The following
provisions shall apply to any Unvested Non-Exempt Award unless otherwise determined by the Board pursuant to Section 12(e). 

(1) In the event of a Change in Control, the Acquiring Entity shall assume, continue or substitute any Unvested Non-Exempt Award. Unless otherwise determined by the Board, any Unvested Non-Exempt Award will remain subject to the same vesting and forfeiture restrictions that were
applicable to the Award prior to the Change in Control. The shares to be issued in respect of any Unvested Non-Exempt Award shall be issued to the Participant by the Acquiring Entity on the same schedule that
the shares would have been issued to the Participant if the Change in Control had not occurred. In the Acquiring Entity’s discretion, in lieu of an issuance of shares, the Acquiring Entity may instead substitute a cash payment on each
applicable issuance date, equal to the Fair Market Value of the shares that would otherwise be issued to the Participant on such issuance dates, with the determination of Fair Market Value of the shares made on the date of the Change in Control.

 (2) If the Acquiring Entity will not assume, substitute or continue any Unvested Non-Exempt
Award in connection with a Change in Control, then such Award shall automatically terminate and be forfeited upon the Change in Control with no consideration payable to any Participant in respect of such forfeited Unvested Non-Exempt Award. Notwithstanding the foregoing, to the extent permitted and in compliance with the requirements of Section 409A, the Board may in its discretion determine to elect to accelerate the vesting and
settlement of the Unvested Non-Exempt Award upon the Change in Control, or instead substitute a cash payment equal to the Fair Market Value of such shares that would otherwise be issued to the Participant, as
further provided in Section 12(e)(ii) below. In the absence of such discretionary election by the Board, any Unvested Non-Exempt Award shall be forfeited without payment of any consideration to the
affected Participants if the Acquiring Entity will not assume, substitute or continue the Unvested Non-Exempt Awards in connection with the Change in Control. 

(3) The foregoing treatment shall apply with respect to all Unvested Non-Exempt Awards upon any
Change in Control, and regardless of whether or not such Change in Control is also a Section 409A Change of Control. 
 (d)
Treatment of Non-Exempt Awards Upon a Change in Control for Non-Employee Directors. The following provisions of this Section 12(d) shall apply and shall
supersede anything to the contrary that may be set forth in the Plan with respect to the permitted treatment of a Non-Exempt Director Award in connection with a Change in Control. 

(i) If the Change in Control is also a Section 409A Change of Control, then the Acquiring Entity may not assume, continue or substitute
the Non-Exempt Director Award. Upon the Section 409A Change of Control the vesting and settlement of any Non-Exempt Director Award will automatically be accelerated
and the shares will be immediately issued to the Participant in respect of the Non-Exempt Director Award. Alternatively, the Company may provide that the Participant will instead receive a cash settlement
equal to the Fair Market Value of the shares that would otherwise be issued to the Participant upon the Section 409A Change of Control pursuant to the preceding provision. 

(ii) If the Change in Control is not also a Section 409A Change of Control, then the Acquiring Entity must either assume, continue or
substitute the Non-Exempt Director Award. Unless otherwise determined by the Board, the Non-Exempt Director Award will remain subject to the same vesting and forfeiture
restrictions that were applicable to the Award prior to the Change in Control. The shares to be issued in respect of the Non-Exempt Director Award shall be issued to the Participant by the Acquiring Entity on
the same schedule that the shares would have been issued to the Participant if the Change in Control had not occurred. In the Acquiring Entity’s discretion, in lieu of an issuance of shares, the Acquiring Entity may instead substitute a cash
payment on each applicable issuance date, equal to the Fair Market Value of the shares that would otherwise be issued to the Participant on such issuance dates, with the determination of Fair Market Value made on the date of the Change in Control.

 (e) If the RSU Award is a Non-Exempt Award, then the provisions in this Section 12(e) shall
apply and supersede anything to the contrary that may be set forth in the Plan or the Award Agreement with respect to the permitted treatment of such Non-Exempt Award: 

(i) Any exercise by the Board of discretion to accelerate the vesting of a Non-Exempt Award shall not
result in any acceleration of the scheduled issuance dates for the shares in respect of the Non-Exempt Award unless earlier issuance of the shares upon the applicable vesting dates would be in compliance with
the requirements of Section 409A. 
 (ii) The Company explicitly reserves the right to earlier settle any Non-Exempt Award to the extent permitted and in compliance with the requirements of Section 409A, including pursuant to any of the exemptions available in Treasury Regulations
Section 1.409A-3(j)(4)(ix). 
 (iii) To the extent the terms of any Non-Exempt Award provide that it will be settled upon a Change in Control or Change of Control, to the extent it is required for compliance with the requirements of Section 409A, the Change in Control or Change
of Control event triggering settlement must also constitute a Section 409A Change of Control. To the extent the terms of a Non-Exempt Award provides that it will be settled upon a termination of
employment or termination of Continuous 

  
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Service, to the extent it is required for compliance with the requirements of Section 409A, the termination event triggering settlement must also constitute a Separation From Service.
However, if at the time the shares would otherwise be issued to a Participant in connection with a “separation from service” such Participant is subject to the distribution limitations contained in Section 409A applicable to
“specified employees,” as defined in Section 409A(a)(2)(B)(i) of the Code, such shares shall not be issued before the date that is six months following the date of the Participant’s Separation From Service, or, if earlier, the
date of the Participant’s death that occurs within such six month period. 
 (iv) The provisions in Section 12(e) for delivery of
the shares in respect of the settlement of a RSU Award that is a Non-Exempt Award are intended to comply with the requirements of Section 409A so that the delivery of the shares to the Participant in
respect of such Non-Exempt Award will not trigger the additional tax imposed under Section 409A, and any ambiguities herein will be so interpreted. 

13. Severability. 
 If all or any part of the Plan or any
Award Agreement is declared by any court or governmental authority to be unlawful or invalid, such unlawfulness or invalidity shall not invalidate any portion of the Plan or such Award Agreement not declared to be unlawful or invalid. Any Section of
the Plan or any Award Agreement (or part of such a Section) so declared to be unlawful or invalid shall, if possible, be construed in a manner which will give effect to the terms of such Section or part of a Section to the fullest extent possible
while remaining lawful and valid. 
 14. Termination of the Plan. 

The Board may suspend or terminate the Plan at any time. No Incentive Stock Options may be granted after the tenth anniversary of the earlier of: (i) the
Adoption Date, or (ii) the Effective Date. No Awards may be granted under the Plan while the Plan is suspended or after it is terminated. 
 15.
Definitions. 
 As used in the Plan, the following definitions apply to the capitalized terms indicated below: 

(a) “Acquiring Entity” means the surviving or acquiring corporation (or its parent company) in connection with a
Change in Control. 
 (b) “Adoption Date” means the date the Plan is first approved by the Compensation Committee of
the Board. 
 (c) “Affiliate” means, at the time of determination, any “parent” or “subsidiary”
of the Company as such terms are defined in Rule 405 promulgated under the Securities Act. The Board may determine the time or times at which “parent” or “subsidiary” status is determined within the foregoing definition. 

(d) “Annual Meeting” means the annual meeting of stockholders of the Company. 

(e) “Applicable Law” means shall mean any applicable securities, federal, state, foreign, material local or municipal
or other law, statute, constitution, principle of common law, resolution, ordinance, code, edict, decree, rule, listing rule, regulation, judicial decision, ruling or requirement issued, enacted, adopted, promulgated, implemented or otherwise put
into effect by or under the authority of any Governmental Body (or under the authority of the NASDAQ Stock Market or the Financial Industry Regulatory Authority). 

(f) “Appreciation Award” means (i) a stock option or stock appreciation right granted under any of the Prior
Plans or (ii) an Option or SAR granted under the Plan, in each case with respect to which the exercise or strike price is at least 100% of the Fair Market Value of the Common Stock subject to the option or stock appreciation right, as
applicable, on the date of grant. 
 (g) “Automatic Grant Program” means the grant program in effect for Eligible
Directors under Section 7 of the Plan. 
 (h) “Award” means any right to receive Common Stock granted under the
Plan, including an Incentive Stock Option, a Nonstatutory Stock Option, a Restricted Stock Award, a RSU Award, a SAR, a Performance Award or any Other Award. 

(i) “Award Agreement” means a written agreement between the Company and a Participant evidencing the terms and
conditions of an Award. The Award Agreement generally consists of the Grant Notice and General Terms and Conditions. 
 (j)
“Board” means the Board of Directors of the Company. Any decision or determination made by the Board shall be a decision or determination that is made in the sole discretion of the Board (or its designee), and such decision
or determination shall be final and binding on all Participants. 

  
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 (k) “Capitalization Adjustment” means any change that is made in, or
other events that occur with respect to, the Common Stock subject to the Plan or subject to any Award after the Effective Date without the receipt of consideration by the Company through merger, consolidation, reorganization, recapitalization,
reincorporation, stock dividend, dividend in property other than cash, large nonrecurring cash dividend, stock split, reverse stock split, liquidating dividend, combination of shares, exchange of shares, change in corporate structure or any similar
equity restructuring transaction, as that term is used in Statement of Financial Accounting Standards Board Accounting Standards Codification Topic 718 (or any successor thereto). Notwithstanding the foregoing, the conversion of any convertible
securities of the Company will not be treated as a Capitalization Adjustment. 
 (l) “Cause” has the meaning
ascribed to such term in any written agreement between the Participant and the Company defining such term and, in the absence of such agreement, such term means, with respect to a Participant, the occurrence of any of the following events that has a
material negative impact on the business or reputation of the Company: (i) such Participant’s attempted commission of, or participation in, a fraud or act of dishonesty against the Company; (ii) such Participant’s intentional,
material violation of any contract or agreement between the Participant and the Company or of any statutory duty owed to the Company; (iii) such Participant’s unauthorized use or disclosure of the Company’s confidential information or
trade secrets; or (iv) such Participant’s gross misconduct. The determination that a termination of the Participant’s Continuous Service is either for Cause or without Cause will be made by the Board with respect to Participants who
are executive officers of the Company and by the Company’s Chief Executive Officer with respect to Participants who are not executive officers of the Company. Any determination by the Company that the Continuous Service of a Participant was
terminated with or without Cause for the purposes of outstanding Awards held by such Participant will have no effect upon any determination of the rights or obligations of the Company or such Participant for any other purpose. 

(m) “Change in Control” or “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 constituting a change in ownership or control of the Company; provided, however, to the extent necessary to avoid adverse personal income tax consequences to the
Participant in connection with an Award, such transaction also constitutes a Section 409A Change of Control: 
 (i) a merger,
consolidation or other reorganization approved by the Company’s stockholders, unless securities representing more than fifty percent (50%) of the total combined voting power of the voting securities of the successor corporation are immediately
thereafter beneficially owned, directly or indirectly and in substantially the same proportion, by the persons who beneficially owned the Company’s outstanding voting securities immediately prior to such transaction, 

(ii) a stockholder-approved sale, transfer or other disposition of all or substantially all of the Company’s assets in complete
liquidation or dissolution of the Company, or 
 (iii) the closing of any transaction or series of related transactions pursuant to which
any person or any group of persons comprising a “group” within the meaning of Rule 13d-5(b)(1) of the Exchange Act (other than the Company or a person that, prior to such transaction or series of
related transactions, directly or indirectly controls, is controlled by or is under common control with, the Company) becomes directly or indirectly the beneficial owner (within the meaning of Rule 13d-3 of
the Exchange Act) of securities possessing (or convertible into or exercisable for securities possessing) more than fifty percent (50%) of the total combined voting power of the Company’s securities (as measured in terms of the power to vote
with respect to the election of Board members) outstanding immediately after the consummation of such transaction or series of related transactions, whether such transaction involves a direct issuance from the Company or the acquisition of
outstanding securities held by one or more of the Company’s existing stockholders. 
 Notwithstanding the foregoing or any other
provision of this Plan, (A) the term Change in Control shall not include a sale of assets, merger or other transaction effected exclusively for the purpose of changing the domicile of the Company, and (B) the definition of Change in
Control (or any analogous term) in an individual written agreement between the Company or any Affiliate and the Participant shall supersede the foregoing definition with respect to Awards subject to such agreement; provided, however, that
(1) if no definition of Change in Control (or any analogous term) is set forth in such an individual written agreement, the foregoing definition shall apply; and (2) no Change in Control (or any analogous term) will be deemed to occur with
respect to Awards subject to such an individual written agreement without a requirement that the Change in Control (or any analogous term) actually occur. 

(n) “Code” means the Internal Revenue Code of 1986, as amended, including any applicable regulations and guidance
thereunder. 
 (o) “Committee” means the Compensation Committee and any other committee of Directors to whom
authority has been delegated by the Board or Compensation Committee in accordance with Section 8(d). 
 (p) “Common
Stock” means the common stock of the Company. 
 (q) “Company” means Sangamo Therapeutics, Inc., a
Delaware corporation. 
 (r) “Compensation Committee” means the Compensation Committee of the Board. 

  
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 (s) “Consultant” means any person, including an advisor, who is
(i) engaged by the Company or an Affiliate to render consulting or advisory services and is compensated for such services, or (ii) serving as a member of the board of directors of an Affiliate and is compensated for such services. However,
service solely as a Director, or payment of a fee for such service, will not cause a Director to be considered a “Consultant” for purposes of the Plan. Notwithstanding the foregoing, a person is treated as a Consultant under this Plan only
if a Form S-8 Registration Statement under the Securities Act is available to register either the offer or the sale of the Company’s securities to such person. 

(t) “Continuous Service” means that the Participant’s service with the Company or an Affiliate, whether as an
Employee, Director or Consultant, is not interrupted or terminated. A change in the capacity in which the Participant renders service to the Company or an Affiliate as an Employee, Director or Consultant or a change in the Entity for which the
Participant renders such service, provided that there is no interruption or termination of the Participant’s service with the Company or an Affiliate, will not terminate a Participant’s Continuous Service; provided, however, that if
the Entity for which a Participant is rendering services ceases to qualify as an Affiliate, as determined by the Board, such Participant’s Continuous Service will be considered to have terminated on the date such Entity ceases to qualify as an
Affiliate. For example, a change in status from an Employee of the Company to a Consultant of an Affiliate or to a Director will not constitute an interruption of Continuous Service. To the extent permitted by law, the Board or the chief executive
officer of the Company, in that party’s sole discretion, may determine whether Continuous Service will be considered interrupted in the case of (i) any leave of absence approved by the Board or chief executive officer, including sick
leave, military leave or any other personal leave, or (ii) transfers between the Company, an Affiliate, or their successors. Notwithstanding the foregoing, a leave of absence will be treated as Continuous Service for purposes of vesting in an
Award only to such extent as may be provided in the Company’s leave of absence policy, in the written terms of any leave of absence agreement or policy applicable to the Participant, or as otherwise required by law. In addition, to the extent
required for exemption from or compliance with Section 409A, the determination of whether there has been a termination of Continuous Service will be made, and such term will be construed, in a manner that is consistent with the definition of
“separation from service” as defined under Treasury Regulation Section 1.409A-1(h) (without regard to any alternative definition thereunder). 

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

(v) “Disability” means, with respect to a Participant, such Participant is unable to engage in any substantial gainful
activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted or can be expected to last for a continuous period of not less than 12 months, as provided in
Section 22(e)(3) of the Code, and will be determined by the Board on the basis of such medical evidence as the Board deems warranted under the circumstances. 

(w) “Effective Date” means the date of the Annual Meeting in 2018, provided this Plan is approved by the
Company’s stockholders at such meeting. 
 (x) “Eligible Director” means a Director who is not an Employee.

 (y) “Employee” means any person employed by the Company or an Affiliate. However, service solely as a Director,
or payment of a fee for such services, will not cause a Director to be considered an “Employee” for purposes of the Plan. 
 (z)
“Employer” means the Company or the Affiliate of the Company that employs the Participant. 
 (aa)
“Entity” means a corporation, partnership, limited liability company or other entity. 

(bb)    “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and
regulations promulgated thereunder. 
 (cc)    “Fair Market Value” means, as of any date, the
value of the Common Stock (as determined on a per share or aggregate basis, as applicable) determined as follows: 

(i)    If the Common Stock is listed on any established stock exchange or traded on any established market, the Fair
Market Value will be the closing sales price for such stock as quoted on such exchange or market (or the exchange or market with the greatest volume of trading in the Common Stock) on the date of determination, as reported in a source the Board
deems reliable. 
 (ii)    If there is no closing sales price for the Common Stock on the date of determination, then
the Fair Market Value will be the closing selling price on the last preceding date for which such quotation exists. 

(iii)    In the absence of such markets for the Common Stock, or if otherwise determined by the Board, the Fair Market
Value will be determined by the Board in good faith and in a manner that complies with Sections 409A and 422 of the Code. 

(dd)    “Full Value Award” means an Award granted under the Plan or an award granted under the
Prior Plans that is not an Appreciation Award. 

  
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 (ee)    “General Terms and Conditions” means the
written summary of the general terms and conditions applicable to an Award and which is provided to a Participant along with the Grant Notice. 

(ff)    “Governmental Body” means any: (a) nation, state, commonwealth,
province, territory, county, municipality, district or other jurisdiction of any nature; (b) federal, state, local, municipal, foreign or other government; (c) governmental or regulatory body, or quasi-governmental body of any nature
(including any governmental division, department, administrative agency or bureau, commission, authority, instrumentality, official, ministry, fund, foundation, center, organization, unit, body or Entity and any court or other tribunal, and for the
avoidance of doubt, any Tax authority) or other body exercising similar powers or authority; or (d) self-regulatory organization (including the Nasdaq Stock Market and the Financial Industry Regulatory Authority). 

(gg)    “Grant Notice” means the written notice provided to a Participant that he or she has been
granted an Award under the Plan and which includes the name of the Participant, the type of Award, the date of grant of the Award, number of shares of Common Stock subject to the Award (if any), the vesting schedule for the Award (if any) and other
key terms applicable to the Award. 
 (hh)    “Hostile Take-Over” means a change in ownership or
control of the Company effected through either of the following transactions: 
 (i)    a change in the composition of
the Board over a period of thirty-six (36) consecutive months or less such that a majority of the Board members ceases, by reason of one or more contested elections for Board membership, to be comprised
of individuals who either (A) have been Board members continuously since the beginning of such period or (B) have been elected or nominated for election as Board members during such period by at least a majority of the Board members
described in clause (A) who were still in office at the time the Board approved such election or nomination, or 

(ii)    a Hostile Tender-Offer. 

(ii)    “Hostile Tender-Offer” means the acquisition, directly or indirectly, by any person or
related group of persons (other than the Company or a person that directly or indirectly controls, is controlled by, or is under common control with, the Company) of beneficial ownership (within the meaning of Rule
13d-3 of the Exchange Act) of securities possessing more than fifty percent (50%) of the total combined voting power of the Company’s outstanding securities pursuant to a tender or exchange offer made
directly to the Company’s stockholders which the Board does not recommend such stockholders to accept. 

(jj)    “Incentive Stock Option” means an option granted pursuant to Section 4 of the Plan
that is intended to be, and qualifies as, an “incentive stock option” within the meaning of Section 422 of the Code. 

(kk)    “Non-Employee Director” means a Director who
either (i) is not a current employee or officer of the Company or an Affiliate, does not receive compensation, either directly or indirectly, from the Company or an Affiliate for services rendered as a consultant or in any capacity other than
as a Director (except for an amount as to which disclosure would not be required under Item 404(a) of Regulation S-K promulgated pursuant to the Securities Act (“Regulation S-K”)), does not possess an interest in any other transaction for which disclosure would be required under Item 404(a) of Regulation S-K, and is not engaged in a
business relationship for which disclosure would be required pursuant to Item 404(b) of Regulation S-K; or (ii) is otherwise considered a “non-employee
director” for purposes of Rule 16b-3. 
 (ll)    “Non-Exempt Award” means any Award that is subject to, and not exempt from, Section 409A, including as the result of (i) a deferral of the issuance of the shares subject to the Award which is
elected by the Participant or imposed by the Company, or (ii) the terms of any Non-Exempt Severance Agreement. 

(mm)    “Non-Exempt Director Award” means a Non-Exempt Award granted to a Participant who was a Director but not an Employee on the applicable grant date. 

(nn)    “Non-Exempt Severance Arrangement” means a
severance arrangement or other agreement between the Participant and the Company that provides for acceleration of vesting of an Award and issuance of the shares in respect of such Award upon the Participant’s termination of employment or
separation from service (as such term is defined in Section 409A(a)(2)(A)(i) of the Code (and without regard to any alternative definition thereunder) (“Separation from Service”) and such severance benefit does not
satisfy the requirements for an exemption from application of Section 409A provided under Treasury Regulations Section 1.409A-1(b)(4), 1.409A-1(b)(9) or
otherwise. 
 (oo)    “Nonstatutory Stock Option” means any option granted pursuant to
Section 4 of the Plan that does not qualify as an Incentive Stock Option. 

(pp)    “Officer” means a person who is an officer of the Company within the meaning of
Section 16 of the Exchange Act. 
 (qq)    “Option” means an Incentive Stock Option or a
Nonstatutory Stock Option to purchase shares of Common Stock granted pursuant to the Plan. 

  
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 (rr)    “Option Agreement” means a written
agreement between the Company and an Optionholder evidencing the terms and conditions of an Option grant and which includes the Option Grant Notice and the Option Terms and Conditions. Each Option Agreement will be subject to the terms and
conditions of the Plan. 
 (ss)    “Optionholder” means a person to whom an Option is granted
pursuant to the Plan or, if applicable, such other person who holds an outstanding Option. 
 (tt)    “Other
Award” means an award based in whole or in part by reference to the Common Stock which is granted pursuant to the terms and conditions of Section 5(c). 

(uu)    “Other Award Agreement” means a written agreement between the Company and a holder of an
Other Award evidencing the terms and conditions of an Other Award grant. Each Other Award Agreement will be subject to the terms and conditions of the Plan. 

(vv)    “Own,” “Owned,” “Owner,”
“Ownership” means that a person or Entity will 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. 

(ww)    “Participant” means an Employee, Director or Consultant to whom an Award is granted
pursuant to the Plan or, if applicable, such other person who holds an outstanding Award. 

(xx)    “Performance Award” means an Award that may vest or may be exercised contingent upon the
attainment during a Performance Period of certain Performance Goals and which is granted under the terms and conditions of Section 5(b). 

(yy)    “Performance Criteria” means the one or more criteria that the Board will select for
purposes of establishing the Performance Goals for a Performance Period. The Performance Criteria that will be used to establish such Performance Goals may be based on any one of, or combination of, the following as determined by the Board:
(i) earnings (including earnings per share and net earnings); (ii) earnings before interest, taxes and depreciation; (iii) earnings before interest, taxes, depreciation and amortization; (iv) earnings before interest, taxes,
depreciation, amortization and legal settlements; (v) earnings before interest, taxes, depreciation, amortization, legal settlements and other income (expense); (vi) earnings before interest, taxes, depreciation, amortization, legal
settlements, other income (expense) and stock-based compensation; (vii) earnings before interest, taxes, depreciation, amortization, legal settlements, other income (expense), stock-based compensation and changes in deferred revenue;
(viii) total stockholder return; (ix) return on equity or average stockholder’s equity; (x) return on assets, investment, or capital employed; (xi) stock price; (xii) profit (including gross profit) and/or margin
(including gross margin); (xiii) income (before or after taxes); (xiv) operating income; (xv) operating income after taxes; (xvi) pre-tax profit; (xvii) operating cash flow; (xviii) sales
or revenue targets; (xix) increases in revenue or product revenue; (xx) expenses and cost reduction goals; (xxi) improvement in or attainment of working capital levels; (xxii) economic value added (or an equivalent metric);
(xxiii) market share; (xxiv) cash flow; (xxv) cash flow per share; (xxvi) share price performance; (xxvii) debt reduction; (xxviii) implementation or completion of projects or processes; (xxix) employee retention;
(xxx) stockholders’ equity; (xxxi) capital expenditures; (xxxii) debt levels; (xxxiii) operating profit or net operating profit; (xxxiv) workforce diversity; (xxxv) growth of net income or operating income;
(xxxvi) billings; (xxxvii) bookings; and (xxxviii) other measures of performance selected by the Board. 

(zz)    “Performance Goals” means, for a Performance Period, the one or more goals established by
the Board for the Performance Period based upon the Performance Criteria. Performance Goals may be based on a Company-wide basis, with respect to one or more business units, divisions, Affiliates, or business segments, and in either absolute terms
or relative to the performance of one or more comparable companies or the performance of one or more relevant indices. Unless specified otherwise by the Board (i) in the Award Agreement at the time the Award is granted or (ii) in such
other document setting forth the Performance Goals at the time the Performance Goals are established, the Board will appropriately make adjustments in the method of calculating the attainment of Performance Goals for a Performance Period as follows:
(1) to exclude restructuring and/or other nonrecurring charges; (2) to exclude exchange rate effects; (3) to exclude the effects of changes to generally accepted accounting principles; (4) to exclude the effects of any statutory
adjustments to corporate tax rates; (5) to exclude the effects of items that are “unusual” in nature or occur “infrequently” as determined under generally accepted accounting principles; (6) to exclude the dilutive
effects of acquisitions or joint ventures; (7) to assume that any business divested by the Company achieved performance objectives at targeted levels during the balance of a Performance Period following such divestiture; (8) to exclude the
effect of any change in the outstanding shares of common stock of the Company by reason of any stock dividend or split, stock repurchase, reorganization, recapitalization, merger, consolidation, spin-off,
combination or exchange of shares or other similar corporate change, or any distributions to common stockholders other than regular cash dividends; (9) to exclude the effects of stock based compensation and the award of bonuses under the
Company’s bonus plans; (10) to exclude costs incurred in connection with potential acquisitions or divestitures that are required to expensed under generally accepted accounting principles; and (11) to exclude the goodwill and
intangible asset impairment charges that are required to be recorded under generally accepted accounting principles. In addition, the Board retains the discretion to reduce or eliminate the compensation or economic benefit due upon attainment of
Performance Goals and to define the manner of calculating the Performance Criteria it selects to use for such Performance Period. Partial achievement of the specified criteria may result in the payment or vesting corresponding to the degree of
achievement as specified in the Award Agreement. 

  
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 (aaa)    “Performance Period” means the period
of time selected by the Board over which the attainment of one or more Performance Goals will be measured for the purpose of determining a Participant’s right to vesting or exercise of an Award. Performance Periods may be of varying and
overlapping duration, at the sole discretion of the Board. 
 (bbb)    “Plan” means this Sangamo
Therapeutics, Inc. 2018 Equity Incentive Plan. 
 (ccc)    “Plan Administrator” means the
person, persons, and/or third-party administrator designated by the Company to administer the day to day operations of the Plan and the Company’s other equity incentive programs. 

(ddd)    “Post-Termination Exercise Period” means the period following termination of a
Participant’s Continuous Service within which an Option or SAR is exercisable, as specified in Section 4(g). 

(eee)    “Predecessor Plan” means the Company’s Amended and Restated 2013 Stock Incentive
Plan. 
 (fff)    “Prior Plans” means the Predecessor Plan and the Company’s 2004 Stock
Incentive Plan (together). 
 (ggg)    “Prior Plans’ Returning Shares” means shares of
Common Stock subject to outstanding stock awards granted under the Prior Plans and that following the Effective Date: (A) are not issued because such stock award or any portion thereof expires or otherwise terminates without all of the shares
covered by such stock award having been issued; (B) are not issued because such stock award or any portion thereof is settled in cash; or (C) are forfeited back to or repurchased by the Company because of the failure to meet a contingency
or condition required for the vesting of such shares. 
 (hhh)    “Predecessor Plan’s Available
Reserve” means the number of shares available for the grant of new awards under the Predecessor Plan as of immediately prior to the Effective Date. 

(iii)    “Prospectus” means the document containing the Plan information specified in
Section 10(a) of the Securities Act. 
 (jjj)    “Restricted Stock Award” means an award of
shares of Common Stock which is granted pursuant to the terms and conditions of Section 5(a). 

(kkk)    “Restricted Stock Award Agreement” means a written agreement between the Company and a
holder of a Restricted Stock Award evidencing the terms and conditions of a Restricted Stock Award grant. Each Restricted Stock Award Agreement will be subject to the terms and conditions of the Plan. 

(lll)    “RSU Award” means an Award of restricted stock units representing the right to receive an
issuance of shares of Common Stock which is granted pursuant to the terms and conditions of Section 5(a). 

(mmm)    “RSU Award Agreement” means a written agreement between the Company and a holder of a RSU
Award evidencing the terms and conditions of a RSU Award grant. Each RSU Award Agreement will be subject to the terms and conditions of the Plan. 

(nnn)    “Rule 16b-3” means Rule 16b-3 promulgated under the Exchange Act or any successor to Rule 16b-3, as in effect from time to time. 

(ooo)    “Rule 405” means Rule 405 promulgated under the Securities Act. 

(ppp)    “Section 409A” means Section 409A of the Code and
the regulations and other guidance thereunder. 
 (qqq)    “Section 409A
Change of Control” means a change in the ownership or effective control of the Company, or in the ownership of a substantial portion of the Company’s assets, as provided in Section 409A(a)(2)(A)(v) of the Code and Treasury
Regulations Section 1.409A-3(i)(5) (without regard to any alternative definition thereunder). 

(rrr)    “Securities Act” means the Securities Act of 1933, as amended. 

(sss)    “Share Reserve” means the number of shares available for issuance under the Plan as set
forth in Section 2(a), subject to adjustment pursuant to Section 6(a) in connection with Capitalization Adjustments. 

(ttt)    “SAR” or “Stock Appreciation Right” means a right to receive the
appreciation on Common Stock that is granted pursuant to the terms and conditions of Section 4. 

(uuu)    “SAR Agreement” means a written agreement between the Company and a holder of a SAR
evidencing the terms and conditions of a SAR grant. Each SAR Agreement will be subject to the terms and conditions of the Plan. 

(vvv)    “Ten Percent Stockholder” means a person who Owns (or is deemed to Own pursuant to
Section 424(d) of the Code) stock possessing more than 10% of the total combined voting power of all classes of stock of the Company or any Affiliate. 

  
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 (www)    “Trading Policy” means the
Company’s policy permitting certain individuals to sell Company shares only during certain “window” periods and/or otherwise restricts the ability of certain individuals to transfer or encumber Company shares, as in effect from time
to time. 
 (xxx)    “Unvested Non-Exempt Award” means
the portion of any Non-Exempt Award that had not vested in accordance with its terms upon or prior to the date of any Change in Control. 

(yyy)    “Vested Non-Exempt Award” means the portion of
any Non-Exempt Award that had vested in accordance with its terms upon or prior to the date of a Change in Control. 

  
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