Document:

EX-4.1

 Exhibit 4.1 

WEST FRASER TIMBER CO. LTD. 

(the “Corporation”) 

U.S. EMPLOYEE STOCK PURCHASE PLAN 

1.      Purpose. The purpose of the Employee Share Purchase Plan (the “Plan”) of the Corporation
is to provide eligible Employees of Participating Subsidiaries with a means of acquiring an equity interest in the Corporation through payroll deductions or other contributions in order to enhance such employees’ sense of participation in the
affairs of the Corporation. 
 This Plan includes two components: 
  

	 	(a)	 a component intended to qualify as an “employee stock purchase plan” under Section 423 of the
Code (the “423 Component”), the provisions of which shall be construed so as to extend and limit participation in a uniform and nondiscriminatory manner consistent with the requirements of Section 423 of the Code; and

  

	 	(b)	 a component that does not qualify as an “employee stock purchase plan” under Section 423 of
the Code (the “Non-423 Component”), under which options shall be granted pursuant to rules, procedures or sub-plans adopted by the Committee designed to
achieve tax, securities laws or other objectives for eligible Employees, the Corporation and its Participating Subsidiaries. 

Except as otherwise provided in this Plan, the Non-423 Component will operate and be administered in
the same manner as the 423 Component. 
 West Fraser Timber Co. Ltd. also offers a wholly separate employee stock purchase plan for
employees of designated Canadian subsidiaries of the Corporation (the “Canadian ESPP”). This Canadian ESPP is a separate, unrelated plan that (i) does not qualify as an “employee stock purchase plan” under
Section 423 of the Code, and (ii) is not considered a Non-423 Component for purposes of this Plan. The designated Canadian subsidiaries under the Canadian ESPP are not Participating Subsidiaries
for purposes of this Plan. 
 2.      Definitions. As used herein, the terms set forth below have the meanings
assigned to them in this Section 2 and shall include the plural as well as the singular. 
  

	 	(a)	 “1933 Act” means the Securities Act of 1933, as amended;

  

	 	(b)	 “1934 Act” means the Securities Exchange Act of 1934, as amended;

  

	 	(c)	 “Administrative Agent” means such trust company as may from time to time be appointed by
the Board and with whom the Corporation enters into an Administration Agreement with respect hereto; 

  

	 	(d)	 “Administration Agreement” means the agreement with the Administrative Agent in respect of
the Plan, as amended or replaced from time to time; 

  

	 	(e)	 “Blackout Period” means a blackout period contemplated in the Corporation’s Securities
Trading Policy; 

  

	 	(f)	 “Board” means the Board of Directors of West Fraser Timber Co. Ltd.; 

 

	 	(g)	 “Business Day” shall mean a day on which the NYSE is open for trading.

  

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

	 	(i)	 “Committee” means the Human Resources & Compensation Committee of the Corporation,
or the designee of the Human Resources & Compensation Committee; 

  

	 	(j)	 “Common Shares” means the Class B common shares, no par value, of the Corporation;

  

	 	(k)	 “Corporation” means West Fraser Timber Co. Ltd.; 

 

	 	(l)	 “Compensation” means the base pay or base hourly rate pay received by a Participant
and which, for clarity, does not include: (i) commissions, overtime and regular annual, quarterly and monthly cash bonuses and vacation, holiday and sick pay, (ii) income related to stock option awards, stock grants and other equity
incentive awards, (iii) expense reimbursements, (iv) relocation-related payments, (v) benefit plan payments (including but not limited to short-term disability pay, long-term disability pay, maternity pay, military pay, tuition
reimbursement and adoption assistance), (vi) accrued but unpaid compensation for a deceased Participant, (vii) income from non-cash and fringe benefits, (viii) severance payments, and (ix) other
forms of compensation not specifically listed herein. 

  

	 	(m)	 “Employee” means any individual who is a common law employee of any of the
Participating Subsidiaries. For purposes of the Plan, the employment relationship shall be treated as continuing intact while the individual is on sick leave or other leave of absence approved by the Participating Subsidiary, as appropriate, and
only to the extent permitted under Section 423 of the Code with respect to the 423 Component. For purposes of the Plan, an individual who performs services for a Participating Subsidiary pursuant to an agreement (written or oral) that
classifies such individual’s relationship with the Participating Subsidiary as other than a common law employee shall not be considered an “employee” with respect to any period preceding the date on which a court or administrative
agency issues a final determination that such individual is an “employee.”; 

  

	 	(n)	 “Enrollment Date” means the first Business Day of each Offering Period;

  

	 	(o)	 “Exercise Date” means the last Business Day of each Offering Period (or, if
determined by the Committee, the Purchase Period if different from the Offering Period); 

  

	 	(p)	 “Fair Market Value” on or as of any date means the weighted average purchase price for the
Common Shares acquired on NYSE on the relevant date; or, if the Common Shares are no longer listed on NYSE, the weighted average purchase price for Common Shares acquired on such other exchange on which the Shares are listed; 

 

	 	(q)	 “Insider” means an “insider” as defined in the rules and policies of the TSX or
as defined in the Securities Act (British Columbia), which will include any “associate” of such a person, as defined in the Securities Act (British Columbia). 

 

	 	(r)	 “NYSE” means New York Stock Exchange; 

 

	 	(s)	 “Offering Period” means a period of three (3) months commencing on January 1,
April 1, July 1 and October 1 of each calendar year or such other period designated by the Committee; provided that in no event shall an Offering Period exceed 27 months. The first Offering Period shall commence no earlier than
July 1, 2021. Notwithstanding anything herein to the contrary, the Committee may establish an Offering Period with multiple Purchase Periods within such Offering Period; 

 

	 	(t)	 “Option” means an option granted under this Plan that entitles a Participant to purchase
Common Shares; 

  

	 	(u)	 “Participant” means an Employee who satisfies the requirements of Sections 3 and 5 of the
Plan; 

	 	(v)	 “Participating Subsidiary” means each Subsidiary of the Corporation designated by the
Committee as a “Participating Subsidiary” and whose Employees will be entitled to participate in this Plan, which will include initially those Subsidiaries of the Corporation identified in Schedule A to this Plan; 

 

	 	(w)	 “Plan” means this U.S. Employee Stock Purchase Plan of the Corporation, as amended from
time to time. 

  

	 	(x)	 “Purchase Account” means the account maintained for record keeping purposes by the
Administrative Agent in the name of each Participant; 

  

	 	(y)	 “Purchase Period” means the period designated by the Committee during which payroll
deductions or other contributions of the Participants are accumulated under the Plan. A Purchase Period may coincide with an entire Offering Period or there may be multiple Purchase Periods within an Offering Period, as determined by the Committee
prior to the commencement of the applicable Offering Period; 

  

	 	(z)	 “Purchase Price” means with respect to an Offering Period an amount equal to 85% of the
Fair Market Value of a Common Share on the Exercise Date; 

  

	 	(aa)	 “Purchased Shares” means the Common Shares purchased for the account of a Participant
pursuant to the exercise of Options under the Plan; 

  

	 	(bb)	 “Subsidiary” means an entity, domestic or foreign, of which not less than 50% of the
voting equity is held by the Corporation or a Subsidiary, whether or not such entity now exists or is hereafter organized or acquired by the Corporation or a Subsidiary; provided such entity is also a “subsidiary” within the meaning of
Section 424 of the Code; 

  

	 	(cc)	 “Termination Date” means (i) the date on which a Participant terminates employment or
on which the Participant ceases to provide services to a Subsidiary as an employee or (ii) subject to Section 423 of the Code with respect to the 423 Component, the date on which the Participant’s employment is determined to have been
terminated for purposes of the Plan by the Committee. The Termination Date specifically does not include any period following that date which the Participant may be eligible for or in receipt of other payments from the Corporation including in lieu
of notice or termination or severance pay or as wrongful dismissal damages; 

  

	 	(dd)	 “TSX” means the Toronto Stock Exchange; and 

 

	 	(ee)	 “Undisclosed Material Information” means any material information, as defined in the
Corporation’s Disclosure Policy as it may be amended or supplemented from time to time, that has not been publicly disseminated by the Corporation. 

3.      Eligibility. For each Option Period, any Employee of a Participating Subsidiary will be eligible to be
granted Options under the Plan, provided that: 
  

	 	(a)	 Employees whose customary employment is for less than five (5) months in a calendar year are not
eligible to participate in the Plan; 

  

	 	(b)	 Employees whose customary employment is 20 hours or less per week are not eligible to participate in the
Plan; and 

  

	 	(c)	 the Committee may from time to time exclude Employees from the Section 423 component of the Plan where
such exclusions are consistent with the permitted exclusions under Section 423(b) of the Code. 

 4.      Limitations on Option Grants. Notwithstanding the
eligibility of an Employee to receive a grant of an Option under Section 3 of this Plan, no Employee shall be granted an Option under the 423 Component of the Plan if: 
  

	 	(a)	 immediately after the grant, such Employee (or any other person whose stock would be attributed to such
Employee pursuant to Section 424(d) of the Code) would own capital stock of the Corporation or any of its Subsidiaries and/or hold outstanding Options or options to purchase stock possessing 5% or more of the total combined voting power or
value of all classes of stock of the Corporation or any of their respective Subsidiaries; 

  

	 	(b)	 such Option would permit his or her rights to purchase stock under all employee stock purchase plans
(described in Section 423 of the Code) of the Corporation and its Subsidiaries to accrue at a rate that exceeds $15,000 of the Fair Market Value of such stock (determined at the time each such Option is granted) for each calendar year in which
such Option is outstanding at any time. 

  

	 	(c)	 the grant of such Option would entitled the Employee to purchase more than 5,000 Common Shares during any
Offering Period; and 

  

	 	(d)	 in no event may a Participant be granted an Option under the Plan following his or her Termination Date.

 For purposes of paragraph (a), the rules of Section 424(d) of the Code shall apply in determining the stock
ownership of an individual. The provisions of paragraph (b) shall be interpreted in accordance with Section 423(b)(8) of the Code.

5.      Participation. 
  

	 	(a)	 An Employee shall be eligible to participate on the first Enrollment Date that occurs at least 1 year (or
such other time determined by the Committee and consistent with Section 423 of the Code with respect to the 423 Component) after such Employee’s first date of employment with a Participating Subsidiary. 

 

	 	(b)	 Subject to paragraph (c) below, an Employee that is eligible under paragraph (a) may elect to
become a Participant by properly completing and submitting a participation election form (a “Participation Election Form”) to a Participating Subsidiary or to the Administrative Agent, if directed by the Participating Subsidiary.

  

	 	(c)	 Notwithstanding paragraph (b), no Employee will be entitled to deliver a Participant Election Form during a
Blackout Period. The Participation Election Form will include the confirmation of the Employee that the Employee is not aware of any Undisclosed Material Information at the time of execution of the Participation Election Form. 

 

	 	(d)	 An Employee who does not become a Participant on the first Enrollment Date on which he or she is eligible
may thereafter become a Participant on any subsequent Enrollment Date by properly completing and submitting a Participation Election Form. 

  

	 	(e)	 Payroll deductions for a Participant shall commence on the first payroll date following the Enrollment Date
and shall end on the last payroll date in the Purchase Period to which such authorization is applicable, unless sooner terminated by the Participant as provided in Section 12 hereof. 

6.      Payroll Deductions. 
  

	 	(a)	 A Participant shall elect to have payroll deductions made during a Purchase Period equal to no less than 1%
of the Participant’s Compensation up to a maximum of 10% (or such greater amount as the Committee establishes from time to time). The election will be made on the Participant Election Form submitted by the Participant. The amount of such
payroll deductions shall be in whole percentages. 

	 	(b)	 All payroll deductions made by a Participant shall be credited to his or her Purchase Account.

  

	 	(c)	 A Participant may not make any additional payments into his or her Purchase Account. Notwithstanding the
foregoing or any provisions to the contrary in the Plan, the Committee may allow participants to make other contributions under the Plan via cash, check, or other means instead of payroll deductions if payroll deductions are not permitted under
applicable local law, and for any Offering Period under the 423 Component, administratively feasible and the Committee determines that such other contributions are permissible under Section 423 of the Code. 

 

	 	(d)	 Except as otherwise determined by the Committee prior to the commencement of an Offering Period, a
Participant may not increase or decrease the rate of payroll deductions during an Offering Period. A Participant may change his or her payroll deduction percentage under subsection (a) above for any subsequent Offering Period by properly
completing and submitting an election change form in accordance with the procedures prescribed by the Committee. The change in amount shall be effective as of the first Enrollment Date following the date of filing of the election change form. Unless
otherwise determined by the Committee prior to the commencement of an Offering Period, a payroll deduction election will automatically apply to the next Offering Period, unless otherwise cancelled or changed by the Participant prior to the
commencement of such Offering Period. 

  

	 	(e)	 Notwithstanding the foregoing, to the extent necessary to comply with Section 423(b)(8) of the Code and
Section 4(b) of this Plan, a Participant’s payroll deductions may be decreased to 0% at any time during an Offering Period. Payroll deductions shall recommence at the rate provided in such Participant’s election form at the beginning
of the first Offering Period which is scheduled to end in the following calendar year, unless terminated by the Participant as provided in Section 13 hereof. 

7.      Grant of Option. On the applicable Enrollment Date, each Participant in an Offering Period shall be granted
an Option to purchase on the applicable Exercise Date a number of full and fractional Common Shares determined by dividing such Participant’s payroll deductions accumulated prior to such Exercise Date and retained in the Participant’s
Purchase Account as of the applicable Exercise Date by the applicable Purchase Price. 
 8.      Exercise of
Option. A Participant’s Option for Common Shares shall be exercised automatically on the Exercise Date, and the maximum number of Shares subject to the Option shall be procured for such Participant at the applicable Purchase Price with the
payroll deductions accumulated during the Purchase Period in his or her Purchase Account. The Corporation will satisfy the exercise of all Participant’s Options for Common Shares through either: 

 

	 	(a)	 the purchase of Common Shares on the NYSE on behalf of the applicable Participants on the open market
through an independent broker retained by the Administrative Agent; or 

  

	 	(b)	 at any time following approval of this plan by the shareholders of the Corporation and by the TSX and NYSE
in accordance with their rules and policies, the issuance of Common Shares to the credit of the Participant. 

 In the event of the purchase of Common Shares on the NYSE under paragraph (a), the number of
Purchased Shares deliverable to the Participant on the Exercise Date will be credited to the Participant effective on the Exercise Date through the Participant’s Purchase Account with the Administrative Agent, which will include any fractional
numbers of Purchased Shares that may be credited to the Participant. 
 In the event of the issuance of Common Shares by the Company under
paragraph (b), the Common Shares will be issued in book entry form in the account of the Administrative Agent and be considered to be issued and outstanding to such Participant’s credit though the Participant’s Purchase Account as of the
Exercise Date. Any issuance of Common Shares by the Company under paragraph (b) will be subject to the Insider participation limits set forth in Section 22(c) of this Plan. 

9.      Purchase Accounts. The Administrative Agent shall establish a Purchase Account for each Participant and
shall record in each Purchase Account (i) accumulated payroll deductions in the Participant’s Purchase Account, (iii) the number of Purchased Shares (including fractional shares) credited to the Participant’s Purchase Account
upon each Option exercise, and (iii) the amount of any expenses, if any, allocated to such Purchase Account. The following will apply with respect to Common Shares held by the Administrative Agent under this Plan on behalf of a Participant:

  

	 	(a)	 Common Shares (including fractional shares) purchased by or issued to the Administrative Agent under this
Plan shall be registered in the name of the Administrative Agent or such other name as the Administrative Agent determines; 

  

	 	(b)	 whole Common Shares allocated to a Participant’s Purchase Account will be voted by the Administrative
Agent in accordance with the directions, if any, of the Participant; 

  

	 	(c)	 a Participant’s Purchase Account will reflect any cash received by the Administrative Agent on account
of dividends declared and paid by the Corporation on any Common Shares purchased by or issued to the Administrative Agent and held on behalf of the Participant in accordance with this Plan; 

 

	 	(d)	 the Committee may require that Shares be retained with such brokers or agents for a designated period of
time and/or may establish other procedures to permit tracking of disqualifying dispositions of such shares, and may also impose a transaction fee with respect to a sale of Shares issued to a Participant’s credit and held by such a broker or
agent; and 

  

	 	(e)	 the Committee may permit Shares purchased under the Plan to participate in any dividend reinvestment plan or
program maintained by the Company and establish a default method for the payment of dividends 

 10.
    Approval by Shareholders. Notwithstanding the above, the Plan is expressly made subject to the approval of the shareholders of the Corporation within 12 months before or after the date the Plan is adopted by the Board.
Such shareholder approval shall be obtained in the manner and to the degree required under applicable federal and state law. If the Plan is not so approved by the shareholders within 12 months before or after the date the Plan is adopted by the
Board, this Plan shall not come into effect. 
 11.     Administration. 

 

	 	(a)	 Powers and Duties of the Committee. The Plan shall be administered by the Committee. Subject to the
provisions of the Plan, Section 423 of the Code and the regulations thereunder with respect to the 423 Component, the Committee shall have the discretionary authority to determine the time and frequency of granting Options, the duration of
Offering Periods and Purchase Periods, the terms and conditions of the Options and the number of Common Shares subject to each Option. The Committee shall also have the discretionary authority to do everything necessary and appropriate to administer
the Plan, including, without limitation, interpreting the provisions of the Plan (but any such interpretation shall not be inconsistent with the provisions of Section 423 of the Code with respect to the 423 Component). All actions, decisions
and determinations of, and interpretations by the Committee with respect to the Plan shall be final and binding upon all Participants and upon their executors, administrators, personal representatives, heirs and legatees. No member of the Board or
the Committee shall be liable for any action, decision, determination or interpretation made in good faith with respect to the Plan or any Option granted hereunder. With respect to the 423 Component, an Offering Period shall be administered so as to
ensure that all Participants have the same rights and privileges as provided by Section 423(b)(5) of the Code. 

	 	(b)	 Administrator. The Corporation, Board or the Committee may engage the services of a brokerage firm or
financial institution to perform certain ministerial and procedural duties under the Plan including, but not limited to, mailing and receiving notices contemplated under the Plan, determining the number of Purchased Shares for each Participant,
maintaining or causing to be maintained the Purchase Account, disbursing funds maintained in the Purchase Account or proceeds from the sale of Purchased Shares, and filing with the appropriate tax authorities proper tax returns and forms (including
information returns) and providing to each Participant statements as required by law or regulation. 

  

	 	(c)	 Indemnification. Each person who is or shall have been (a) a member of the Board, (b) a
member of the Committee, or (c) an officer or employee of the Corporation to whom authority was delegated in relation to this Plan, shall be indemnified and held harmless by the Corporation against and from any loss, cost, liability or expense
that may be imposed upon or reasonably incurred by him or her in connection with or resulting from any claim, action, suit or proceeding to which he or she may be a party or in which he or she may be involved by reason of any action taken or failure
to act under the Plan and against and from any and all amounts paid by him or her in settlement thereof, with the Corporation’s approval, or paid by him or her in satisfaction of any judgment in any such claim, action, suit or proceeding
against him or her; provided, however, that he or she shall give the Corporation an opportunity, at its own expense, to handle and defend the same before he or she undertakes to handle and defend it on his or her own behalf, unless such loss, cost,
liability or expense is a result of his or her own willful misconduct or except as expressly provided by statute. The foregoing right of indemnification shall not be exclusive of any other rights of indemnification to which such persons may be
entitled under the Corporation’s certificate of incorporation or bylaws, any contract with the Corporation, as a matter of law, or otherwise, or of any power that the Corporation may have to indemnify them or hold them harmless.

 12.     Withdrawal. A Participant may withdraw from the Plan by properly completing and
submitting to the Administrative Agent a withdrawal form in accordance with the procedures prescribed by the Committee, which must be submitted prior to the date specified by the Committee before the last day of the applicable Offering Period. Upon
withdrawal from the Plan: 
  

	 	(a)	 any payroll deductions credited to the Participant’s Purchase Account prior to the effective date of
the Participant’s withdrawal from the Plan will be returned to the Participant; 

  

	 	(b)	 no further payroll deductions for the purchase of Shares will be made during subsequent Offering Periods,
unless the Participant properly completes and submits a new Participation Election Form by the deadline prescribed by the Committee; 

  

	 	(c)	 all or a portion of the Purchased Shares held by the Administrative Agent for the Purchase Account of the
Participant will be transferred to the Participant or an external account in the name of the Participant, as directed by Participant in the withdrawal form; 

  

	 	(d)	 all or any portion of the Purchased Shares not transferred to the Participant will be sold by the
Administrative Agent and the net proceeds (after deduction of customary commissions and fees) will be distributed to the Participant, together with any cash held by the Administrative Agent in respect of any Purchased Shares held by the
Administrative Agent in the Purchase Account of the Participant. 

 A Participant’s withdrawal from an offering will not have any effect upon his or her
eligibility to participate in the Plan or in any similar plan that may hereafter be adopted by the Corporation. In the case of any instructions to sell all or any Purchased Shares, the Participant will confirm that the Participant is now aware of
any Undisclosed Material Information at the time of such notice. No instructions to sell will be given during a Blackout Period. 
 The
Committee may make additional rules and impose additional requirements regarding withdrawal, which rules and requirements may be administered by the Administrative Agreement under the Administration Agreement. 

13.     Termination of Employment. On the Termination Date of a Participant for any reason prior to the applicable
Exercise Date, whether voluntary or involuntary, and including termination of employment due to retirement, death or as a result of liquidation, dissolution, sale, merger or a similar event affecting the Corporation or a Participating Subsidiary,
the corresponding payroll deductions credited to his or her Purchase Account will be used to purchase Shares on the next Exercise Date, unless the Participant (or in the case of death, the Participant’s estate) withdraws prior to such
Exercise Date pursuant to Section 12. 
 14.     Interest. No interest shall accrue on the payroll
contributions of a Participant in the Plan. 
 15.     Shares. 

 

	 	(a)	 The stock subject to Options shall be the Common Shares of the Corporation as traded on the NYSE

  

	 	(b)	 Subject to adjustment upon changes in capitalization of the Corporation as provided in Section 18
hereof, the maximum number of Shares which may be purchased or issued under the Plan shall be 1,800,000 Shares. If, on a given Exercise Date, the number of Shares with respect to which Options are to be exercised exceeds the number of Shares then
available under the Plan, the Committee shall make a pro rata allocation of the Shares remaining available for purchase in as uniform a manner as shall be practicable and as it shall determine to be equitable. 

 

	 	(c)	 A Participant shall have no interest or voting right in Shares covered by his or her Option until such
Option has been exercised and the Participant has become a holder of record of Shares acquired pursuant to such exercise. 

16.     Designation of Beneficiary. The Committee may permit Participants to designate beneficiaries to receive any
Purchased Shares or payroll deductions, if any, in the Participant’s accounts under the Plan in the event of such Participant’s death. Beneficiary designations shall be made in accordance with procedures prescribed by the Committee. If no
properly designated beneficiary survives the Participant, the Purchased Shares and payroll deductions, if any, will be distributed to the Participant’s estate. 

17.     Assignability of Options. Neither payroll deductions credited to a Participant’s Purchase Account nor
any rights with regard to the exercise of an Option or to receive Common Shares under the Plan may be assigned, transferred, pledged or otherwise disposed of in any way (other than by will, the laws of descent and distribution or as provided in
Section 16 hereof) by the Participant. Any such attempt at assignment, transfer, pledge or other disposition shall be without effect, except that the Corporation may treat such act as an election to withdraw from an Offering Period in
accordance with Section 12 hereof. 

 18.     Adjustment of Number of Common Shares Subject to Options.

  

	 	(a)	 Adjustment. Subject to any required action by the shareholders of the Corporation, the maximum number
of securities available for purchase under the Plan, as well as the price per security and the number of securities covered by each Option under the Plan which has not yet been exercised shall be appropriately adjusted in the event of any a stock
split, reverse stock split, stock dividend, combination or reclassification of the common stock of the Corporation, or any other increase or decrease in the number of Common Shares effected without receipt of consideration by the Corporation;
provided, however, that conversion of any convertible securities of the Corporation shall not be deemed to have been “effected without receipt of consideration.” Such adjustment shall be made by the Board or the Committee, whose
determination in that respect shall be final, binding and conclusive. If any such adjustment would result in a fractional security being available under the Plan, such fractional security shall be disregarded. Except as expressly provided herein, no
issuance by the Corporation of shares of stock of any class, or securities convertible into shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of Common Shares subject
to an Option. With respect to the 423 Component, the Options granted pursuant to the Plan shall not be adjusted in a manner that causes the Options to fail to qualify as options issued pursuant to an “employee stock purchase plan”
within the meaning of Section 423 of the Code. 

  

	 	(b)	 Dissolution or Liquidation. In the event of the proposed dissolution or liquidation of the
Corporation, any Offering Period then in progress will terminate immediately prior to the consummation of such proposed action, unless otherwise provided by the Board, and the Board may either provide for the purchase of Common Shares as of the date
on which such Offering Period terminates or return to each Participant the payroll deductions credited to such Participant’s Purchase Account. 

  

	 	(c)	 Merger or Asset Sale. In the event of a proposed sale of all or substantially all of the
assets of the Corporation, or the merger of the Corporation with or into another corporation, each outstanding Option shall be assumed or an equivalent option substituted by the successor corporation or a parent or subsidiary of the successor
corporation, unless the Board determines, in the exercise of its sole discretion, that in lieu of such assumption or substitution to either terminate all outstanding Options and return to each Participant the payroll deductions credited to such
Participant’s Purchase Account or to provide for the Offering Period in progress to end on a date prior to the consummation of such sale or merger. 

19.     Amendments or Termination of the Plan. 

 

	 	(a)	 The Board or the Committee may at any time and for any reason amend, modify, suspend, discontinue or
terminate the Plan without notice; provided that no Participant’s existing rights in respect of existing Options are adversely affected thereby. To the extent necessary to comply with Section 423 of the Code (or any other applicable law,
regulation or stock exchange rule), the Corporation shall obtain shareholder approval in such a manner and to such a degree as required. 

  

	 	(b)	 Without shareholder consent and without regard to whether any Participant rights may be considered to have
been “adversely affected,” the Board or the Committee shall be entitled to change the Purchase Price, Offering Periods, Purchase Periods, eligibility requirements, limit or increase the frequency and/or number of changes in the amount
withheld during a Purchase Period, establish the exchange ratio applicable to amounts withheld in a currency other than U.S. dollars, permit payroll withholding in an amount less than or greater than the amount designated by a Participant in order
to adjust for delays or mistakes in the Corporation’s processing of properly completed withholding elections, establish reasonable waiting and adjustment periods and/or accounting and crediting procedures to ensure that amounts applied toward
the purchase of Common Shares for each Participant properly correspond with amounts withheld from the Participant’s Compensation, and establish such other limitations or procedures as the Board or the Committee determines in its sole discretion
advisable which are consistent with the Plan; provided, however, that changes to (i) the Purchase Price, (ii) the Offering Period, (iii) the Purchase Period, (iv) the maximum percentage of Compensation that may be deducted
pursuant to Section 6(a) or (v) the maximum number of Common Shares that may be purchased in a Purchase Period, shall not be effective until communicated to Participants in a reasonable manner, with the determination of such reasonable
manner in the sole discretion of the Board or the Committee. 

 20.     No Other Obligations. The receipt of an Option pursuant
to the Plan shall impose no obligation upon the Participant to purchase any Common Shares covered by such Option. Nor shall the granting of an Option pursuant to the Plan constitute an agreement or an understanding, express or implied, on the part
of the Corporation to employ the Participant for any specified period. 
 21.     Notices and Communication. Any
notice or other form of communication which the Corporation or a Participant may be required or permitted to give to the other shall be provided through such means as designated by the Committee, including but not limited to any paper or electronic
method. 
 22.     Condition upon Purchase of Common Shares. 

 

	 	(a)	 Common Shares shall not be issued, purchased or delivered with respect to an Option unless the exercise of
such Option and the purchase and delivery of such Common Shares pursuant thereto shall comply with all applicable provisions of law, domestic or foreign, including, without limitation, the 1933 Act and the 1934 Act and the rules and regulations
promulgated thereunder, and the requirements of any stock exchange upon which the Common Shares may then be listed, and shall be further subject to the approval of counsel for the Corporation with respect to such compliance. 

 

	 	(b)	 As a condition to the exercise of an Option, the Corporation may require the person exercising such Option
to represent and warrant at the time of any such exercise that the Common Shares are being purchased only for investment and without any present intention to sell or distribute such Common Shares if, in the opinion of counsel for the Corporation,
such a representation is required by any of the aforementioned applicable provisions of law. 

  

	 	(c)	 This Plan is subject to the following restrictions with respect to Insiders of the Corporation that may
receive Options: 

  

	 	(i)	 the total number of Common Shares reserved for issuance at any time under Options held by any one Insider,
when combined with all other Common Shares issuable to the Insider under any other equity compensation arrangements of the Corporation then in place, may not exceed 5% of the total number of issued and outstanding equity securities of the
Corporation on a non-diluted basis; 

  

	 	(ii)	 the total number of Common Shares reserved for issuance at any time under Options granted, or that may be
granted pursuant to the Plan, to Insiders, or when combined with all other Common Shares issuable to Insiders under any other equity compensation arrangements of the Corporation then in place, may not exceed 10% of the total number of issued and
outstanding equity securities of the Corporation on a non-diluted basis; 

  

	 	(iii)	 the total number of Common Shares that may be issued to Insiders during any
12-month period under Options, or when combined with all other Common Shares issued to Insiders under any other equity compensation arrangements of the Corporation then in place, may not exceed 10% of the
total number of issued and outstanding equity securities of the Corporation on a non-diluted basis; and 

	 	(iv)	 the total number of Common Shares that may be subject to Options granted to Insiders during any calendar
year may not exceed 1% of the total number of issued and outstanding equity securities of the Corporation as at the beginning of the calendar year. 

23.     General Compliance. The Plan will be administered, and Options will be exercised in compliance with the
1933 Act, 1934 Act and all other applicable securities laws and the Corporation policies, including without limitation, the Securities Trading Policy of the Corporation. All amounts withheld pursuant to the Plan, Common Shares issued hereunder and
any payments pursuant to the Plan are subject to withholding of all applicable taxes and the Corporation and the Participating Subsidiaries shall have the right to withhold from any payment or distribution of shares or to collect as a condition of
any payment or distribution under the Plan, as applicable, any taxes required by law to be withheld. 
 24.     Term
of the Plan. The Plan shall become effective upon the earlier to occur of (i) its adoption by the Board and (ii) its approval by the shareholders of the Corporation (the earlier of such events, the “Effective Date”), and
shall continue in effect until the earlier of (A) the termination of the Plan pursuant to Section 19 hereof and (B) the ten-year anniversary of the Effective Date, with no new Offering Periods
commencing on or after such ten-year anniversary. 
 25.     Governing
Law. The Plan and all Options granted hereunder shall be construed in accordance with and governed by the laws of the State of Delaware without reference to choice of law principles and subject in all cases to the Code and the regulations
thereunder. 
 26.     Non-U.S. Participants. To the extent permitted
under Section 423 of the Code, without the amendment of the Plan, the Corporation may provide for the participation in the Plan by Employees who are subject to the laws of foreign countries or jurisdictions on such terms and conditions
different from those specified in the Plan as may in the judgment of the Corporation be necessary or desirable to foster and promote achievement of the purposes of the Plan and, in furtherance of such purposes the Corporation may make such
modifications, amendments, procedures, subplans and the like as may be necessary or advisable to comply with provisions of laws of other countries or jurisdictions in which the Corporation or the Participating Subsidiaries operate or have employees.
Each subplan shall constitute a separate “offering” under this Plan in accordance with Treas. Reg. §1.423-2(a) and, to the extent inconsistent with the requirements of Section 423, any such
subplan shall be considered part of the Non-423 Component, and rights granted thereunder shall not be required by the terms of the Plan to comply with Section 423 of the Code. 

27.     Section 409A. The 423 Component is exempt from the application of Section 409A of the Code, and any
ambiguities herein shall be interpreted to so be exempt from Section 409A of the Code. The Non-423 Component is intended to be exempt from the application of Section 409A of the Code under the
short-term deferral exception and any ambiguities shall be construed and interpreted in accordance with such intent. In furtherance of the foregoing and notwithstanding any provision in the Plan to the contrary, if the Committee determines that an
option granted under the Plan may be subject to Section 409A of the Code or that any provision in the Plan would cause an option under the Plan to be subject to Section 409A, the Committee may amend the terms of the Plan and/or of an
outstanding option granted under the Plan, or take such other action the Committee determines is necessary or appropriate, in each case, without the participant’s consent, to exempt any outstanding option or future option that may be granted
under the Plan from or to allow any such options to comply with Section 409A of the Code, but only to the extent any such amendments or action by the Committee would not violate Section 409A of the Code. Notwithstanding the foregoing, the
Corporation shall have no liability to a participant or any other party if the option under the Plan that is intended to be exempt from or compliant with Section 409A of the Code is not so exempt or compliant or for any action taken by the
Committee with respect thereto. 

 SCHEDULE A 

List of Participating Subsidiaries 
  

			
	 Name of Subsidiary
	  	 
		
	 West Fraser, Inc.
	  	
		
	 West Fraser Wood Products, Inc.
	  	
		
	 West Fraser Southern Wholesale, Inc.
	  	
		
	 West Fraser Southeast, Inc.
	  	
		
	 Norbord Panels (USA) Inc.
	  	
		
	 Norbord South Carolina Inc.
	  	
		
	 Norbord Alabama Inc.
	  	
		
	 Norbord Mississippi LLC
	  	
		
	 Norbord Georgia LLC
	  	
		
	 Norbord Texas (Jefferson) Inc.
	  	
		
	 Norbord Texas (Nacogdoches) Inc.
	  	
		
	 Norbord Minnesota Inc.
	  	
		
	 Norbord Sales, Inc.EX-10.2

 Exhibit 10.2 

GRAPHITE BIO, INC. 

2021 STOCK OPTION AND INCENTIVE PLAN 
  

	SECTION	 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS 

The name of the plan is the Graphite Bio, Inc. 2021 Stock Option and Incentive Plan (as amended from time to time, the “Plan”). The
purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and Consultants of Graphite Bio, Inc. (the “Company”) and its Affiliates upon whose judgment, initiative
and efforts the Company largely depends for the successful conduct of its business to acquire a proprietary interest in the Company. It is anticipated that providing such persons with a direct stake in the Company’s welfare will assure a closer
identification of their interests with those of the Company and its stockholders, thereby stimulating their efforts on the Company’s behalf and strengthening their desire to remain with the Company or one of its Affiliates. 

The following terms shall be defined as set forth below: 

“Act” means the U.S. Securities Act of 1933, as amended, and the rules and regulations thereunder. 

“Administrator” means either the Board or the compensation committee of the Board or a similar committee performing the
functions of the compensation committee and which is comprised of not less than two Non-Employee Directors who are independent. 

“Affiliate” means, at the time of determination, any “parent” or “subsidiary” of the Company as such terms
are defined in Rule 405 of the Act. The Board will have the authority to determine the time or times at which “parent” or “subsidiary” status is determined within the foregoing definition. 

“Award” or “Awards,” except where referring to a particular category of grant under the Plan, shall include
Incentive Stock Options, Non-Qualified Stock Options, Stock Appreciation Rights, Restricted Stock Units, Restricted Stock Awards, Unrestricted Stock Awards, Cash-Based Awards, and Dividend Equivalent Rights.

 “Award Agreement” means a written or electronic document setting forth the terms and provisions applicable to an Award
granted under the Plan. Each Award Agreement is subject to the terms and conditions of the Plan. 
 “Board” means the Board
of Directors of the Company. 
 “Cash-Based Award” means an Award entitling the recipient to receive a cash-denominated
payment. 
 “Code” means the U.S. Internal Revenue Code of 1986, as amended, and any successor Code, and related rules,
regulations and interpretations. 

 “Consultant” means a consultant or adviser who provides bona fide
services to the Company or an Affiliate as an independent contractor and who qualifies as a consultant or advisor under Instruction A.1.(a)(1) of Form S-8 under the Act. 

“Dividend Equivalent Right” means an Award entitling the grantee to receive credits based on ordinary cash dividends that
would have been paid on the shares of Stock specified in the Dividend Equivalent Right (or other award to which it relates) if such shares had been issued to and held by the grantee. 

“Effective Date” means the date on which the Plan becomes effective as set forth in Section 19. 

“Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder. 

“Fair Market Value” of the Stock on any given date means the fair market value of the Stock determined in good faith by the
Administrator; provided, however, that if the Stock is listed on the National Association of Securities Dealers Automated Quotation System (“NASDAQ”), NASDAQ Global Market, The New York Stock Exchange or another national securities
exchange or traded on any established market, the determination shall be made by reference to the closing price on such date. If there is no closing price for such date, the determination shall be made by reference to the last date preceding such
date for which there is a closing price; provided further, however, that if the date for which Fair Market Value is determined is the Registration Date, the Fair Market Value shall be the “Price to the Public” (or equivalent) set forth on
the cover page for the final prospectus relating to the Company’s initial public offering. 
 “Incentive Stock Option”
means any Stock Option designated and qualified as an “incentive stock option” as defined in Section 422 of the Code. 
 “Non-Employee Director” means a member of the Board who is not also an employee of the Company or any Subsidiary. 

“Non-Qualified Stock Option” means any Stock Option that is not an Incentive Stock
Option. 
 “Option” or “Stock Option” means any option to purchase shares of Stock granted pursuant to
Section 5. 
 “Registration Date” means the date upon which the registration statement on Form S-1 that is filed by the Company with respect to its initial public offering is declared effective by the U.S. Securities and Exchange Commission. 

“Restricted Shares” means the shares of Stock underlying a Restricted Stock Award that remain subject to a risk of forfeiture
or the Company’s right of repurchase. 
 “Restricted Stock Award” means an Award of Restricted Shares subject to such
restrictions and conditions as the Administrator may determine at the time of grant. 

  
 2 

 “Restricted Stock Units” means an Award of stock units subject to such
restrictions and conditions as the Administrator may determine at the time of grant. 
 “Sale Event” shall mean (i) the
sale of all or substantially all of the assets of the Company on a consolidated basis to an unrelated person or entity, (ii) a merger, reorganization or consolidation pursuant to which the holders of the Company’s outstanding voting power
and outstanding stock immediately prior to such transaction do not own a majority of the outstanding voting power and outstanding stock or other equity interests of the resulting or successor entity (or its ultimate parent, if applicable)
immediately upon completion of such transaction, (iii) the sale of all of the Stock of the Company to an unrelated person, entity or group thereof acting in concert, or (iv) any other transaction in which the owners of the Company’s
outstanding voting power immediately prior to such transaction do not own at least a majority of the outstanding voting power of the Company or any successor entity immediately upon completion of the transaction other than as a result of the
acquisition of securities directly from the Company. 
 “Sale Price” means the value as determined by the Administrator of
the consideration payable, or otherwise to be received by stockholders, per share of Stock pursuant to a Sale Event. 

“Section 409A” means Section 409A of the Code and the regulations and other guidance promulgated
thereunder. 
 “Service Relationship” means any relationship as an employee,
Non-Employee Director or Consultant of the Company or any Affiliate. Unless as otherwise set forth in the Award Agreement, a Service Relationship shall be deemed to continue without interruption in the event a
grantee’s status changes from full-time employee to part-time employee or a grantee’s status changes from employee to Consultant or Non-Employee Director or vice versa, provided that there is no
interruption or other termination of Service Relationship in connection with the grantee’s change in capacity. 

“Stock” means the Common Stock, par value $0.00001 per share, of the Company, subject to adjustments pursuant to
Section 3. 
 “Stock Appreciation Right” means an Award entitling the recipient to receive shares of Stock (or cash, to
the extent explicitly provided for in the applicable Award Agreement) having a value equal to the excess of the Fair Market Value of the Stock on the date of exercise over the exercise price of the Stock Appreciation Right multiplied by the number
of shares of Stock with respect to which the Stock Appreciation Right shall have been exercised. 
 “Subsidiary” means any
corporation or other entity (other than the Company) in which the Company has at least a 50 percent interest, either directly or indirectly. 

“Ten Percent Owner” means an employee who owns or is deemed to own (by reason of the attribution rules of Section 424(d)
of the Code) more than 10 percent of the combined voting power of all classes of stock of the Company or any parent or subsidiary corporation. 

“Unrestricted Stock Award” means an Award of shares of Stock free of any restrictions. 

  
 3 

	SECTION	 2. ADMINISTRATION OF PLAN; ADMINISTRATOR AUTHORITY TO SELECT GRANTEES AND DETERMINE AWARDS

 (a) Administration of Plan. The Plan shall be administered by the Administrator. 

(b) Powers of Administrator. The Administrator shall have the power and authority to grant Awards consistent with the terms of the Plan,
including the power and authority: 
 (i) to select the individuals to whom Awards may from time to time be granted; 

(ii) to determine the time or times of grant, and the extent, if any, of Incentive Stock Options,
Non-Qualified Stock Options, Stock Appreciation Rights, Restricted Stock Awards, Restricted Stock Units, Unrestricted Stock Awards, Cash-Based Awards, and Dividend Equivalent Rights, or any combination of the
foregoing, granted to any one or more grantees; 
 (iii) to determine the number of shares of Stock to be covered by any Award; 

(iv) to determine and modify from time to time the terms and conditions, including restrictions, not inconsistent with the terms of the Plan,
of any Award, which terms and conditions may differ among individual Awards and grantees, and to approve the forms of Award Agreements; 

(v) to accelerate at any time the exercisability or vesting of all or any portion of any Award; 

(vi) subject to the provisions of Section 5(c) or 6(d), to extend at any time the period in which Stock Options or Stock Appreciation
Rights, respectively, may be exercised; and 
 (vii) at any time to adopt, alter and repeal such rules, guidelines and practices for
administration of the Plan and for its own acts and proceedings as it shall deem advisable; to interpret the terms and provisions of the Plan and any Award (including related written instruments); to make all determinations it deems advisable for
the administration of the Plan; to decide all disputes arising in connection with the Plan; and to otherwise supervise the administration of the Plan. 

All decisions and interpretations of the Administrator shall be binding on all persons, including the Company and Plan grantees. 

(c) Delegation of Authority to Grant Awards. Subject to applicable law, the Administrator, in its discretion, may delegate to a
committee consisting of one or more officers of the Company, including the Chief Executive Officer of the Company, all or part of the Administrator’s authority and duties with respect to the granting of Awards to individuals who are
(i) not subject to the reporting and other provisions of Section 16 of the Exchange Act and (ii) not members of the delegated committee. Any such delegation by the Administrator shall include a limitation as to the amount of Stock
underlying Awards that may be granted during the period of the delegation and shall contain guidelines as to the determination of the exercise price and the vesting criteria. The Administrator may revoke or amend the terms of a delegation at any
time but such action shall not invalidate any prior actions of the Administrator’s delegate or delegates that were consistent with the terms of the Plan. 

  
 4 

 (d) Award Agreement. Awards under the Plan shall be evidenced by Award Agreements
that set forth the terms, conditions and limitations for each Award which may include, without limitation, the term of an Award and the provisions applicable in the event the Service Relationship terminates. 

(e) Indemnification. Neither the Board nor the Administrator, nor any member of either or any delegate thereof, shall be liable for any
act, omission, interpretation, construction or determination made in good faith in connection with the Plan, and the members of the Board and the Administrator (and any delegate thereof) shall be entitled in all cases to indemnification and
reimbursement by the Company in respect of any claim, loss, damage or expense (including, without limitation, reasonable attorneys’ fees) arising or resulting therefrom to the fullest extent permitted by law and/or under the Company’s
articles or bylaws or any directors’ and officers’ liability insurance coverage which may be in effect from time to time and/or any indemnification agreement between such individual and the Company. 

(f) Non-U.S. Award Recipients. Notwithstanding any provision of the Plan to the contrary, in
order to comply with the laws in other countries in which the Company and its Affiliates operate or have employees or other individuals eligible for Awards, the Administrator, in its sole discretion, shall have the power and authority to:
(i) determine which Affiliates shall be covered by the Plan; (ii) determine which individuals outside the United States are eligible to participate in the Plan; (iii) modify the terms and conditions of any Award granted to individuals
outside the United States to comply with applicable laws; (iv) establish subplans and modify exercise procedures and other terms and procedures, to the extent the Administrator determines such actions to be necessary or advisable (and such
subplans and/or modifications shall be incorporated into and made part of this Plan); provided, however, that no such subplans and/or modifications shall increase the share limitations contained in Section 3(a) hereof; and (v) take any
action, before or after an Award is made, that the Administrator determines to be necessary or advisable to obtain approval or comply with any local governmental regulatory exemptions or approvals. Notwithstanding the foregoing, the
Administrator may not take any actions hereunder, and no Awards shall be granted, that would violate the Exchange Act or any other applicable United States securities law, the Code, or any other applicable United States governing statute or law.

  

	SECTION	 3. STOCK ISSUABLE UNDER THE PLAN; MERGERS; SUBSTITUTION 

(a) Stock Issuable. The maximum number of shares of Stock reserved and available for issuance under the Plan shall be 5,636,000 shares
(the “Initial Limit”), plus on January 1, 2022 and on each January 1 thereafter, the number of shares of Stock reserved and available for issuance under the Plan shall be cumulatively increased by 5 percent of the number of
shares of Common Stock issued and outstanding on the immediately preceding December 31, or such lesser number of shares as approved by the Administrator, in all cases subject to adjustment as provided in this Section 3(c) (the “Annual
Increase”). Subject to such overall limitation, the maximum aggregate number of shares of Stock that may be issued in the form of Incentive Stock Options shall not exceed the Initial Limit cumulatively increased on January 1, 2022 and on
each 

  
 5 

 
January 1 thereafter by the lesser of the Annual Increase for such year or 5,636,000 shares of Stock, subject in all cases to adjustment as provided in Section 3(c). For purposes of
this limitation, the shares of Stock underlying any awards under the Plan and the shares of Common Stock of the Company underlying the Company’s 2020 Stock Option and Grant Plan, as amended from time to time that are forfeited, canceled, held
back upon exercise of an Option or settlement of an Award to cover the exercise price or tax withholding, reacquired by the Company prior to vesting, satisfied without the issuance of Stock or otherwise terminated (other than by exercise) shall be
added back to the shares of Stock available for issuance under the Plan and, to the extent permitted under Section 422 of the Code and the regulations promulgated thereunder, the shares of Stock that may be issued as Incentive Stock Options. In
the event the Company repurchases shares of Stock on the open market, such shares shall not be added to the shares of Stock available for issuance under the Plan. Subject to such overall limitations, shares of Stock may be issued up to such maximum
number pursuant to any type or types of Award. The shares available for issuance under the Plan may be authorized but unissued shares of Stock or shares of Stock reacquired by the Company. Awards
that may be settled solely in cash shall not be counted against the share reserve, nor shall they reduce the shares of Stock authorized for grant to a grantee in any calendar year. 

(b) Maximum Awards to Non-Employee Directors. Notwithstanding anything to the contrary in this
Plan, the value of all Awards awarded under this Plan and all other cash compensation paid by the Company to any Non-Employee Director for services as a Non-Employee
Director in any calendar year shall not exceed: (i) $1,000,000 in the first calendar year an individual becomes a Non-Employee Director and (ii) $750,000 in any other calendar year. For the purpose of this
limitation, the value of any Award shall be its grant date fair value, as determined in accordance with ASC Topic 718 or successor provision but excluding the impact of estimated forfeitures related to service-based vesting provisions. 

(c) Changes in Stock. Subject to Section 3(d) hereof, if, as a result of any reorganization, recapitalization, reclassification,
stock dividend, extraordinary cash dividend, stock split, reverse stock split or other similar change in the Company’s capital stock, the outstanding shares of Stock are increased or decreased or are exchanged for a different number or kind of
shares or other securities of the Company, or additional shares or new or different shares or other securities of the Company or other non-cash assets are distributed with respect to such shares of Stock or
other securities, or, if, as a result of any merger or consolidation, sale of all or substantially all of the assets of the Company, the outstanding shares of Stock are converted into or exchanged for securities of the Company or any successor
entity (or a parent or subsidiary thereof), the Administrator shall make an appropriate or proportionate adjustment in (i) the maximum number of shares reserved for issuance under the Plan, including the maximum number of shares that may be
issued in the form of Incentive Stock Options, (ii) the number and kind of shares or other securities subject to any then outstanding Awards under the Plan, (iii) the repurchase price, if any, per share subject to each outstanding
Restricted Stock Award, and (iv) the exercise price for each share subject to any then outstanding Stock Options and Stock Appreciation Rights under the Plan, without changing the aggregate exercise price (i.e., the exercise price multiplied by
the number of shares subject to Stock Options and Stock Appreciation Rights) as to which such Stock Options and Stock Appreciation Rights remain exercisable. The Administrator shall also make equitable or proportionate adjustments in the number of
shares subject to outstanding Awards and the exercise price and the terms of outstanding Awards to take into consideration cash dividends paid other than in the ordinary course or any other extraordinary corporate event. The adjustment by the
Administrator shall be final, binding and conclusive. No fractional shares of Stock shall be issued under the Plan resulting from any such adjustment, but the Administrator in its discretion may make a cash payment in lieu of fractional shares. 

  
 6 

 (d) Mergers and Other Transactions. In the case of and subject to the consummation of
a Sale Event, the parties thereto may cause the assumption or continuation of Awards theretofore granted by the successor entity, or the substitution of such Awards with new Awards of the successor entity or parent thereof, with appropriate
adjustment as to the number and kind of shares and, if appropriate, the per share exercise prices, as such parties shall agree. To the extent that the parties to such Sale Event do not provide for the assumption, continuation or substitution of
Awards, upon the effective time of the Sale Event, the Plan and all outstanding Awards granted hereunder shall terminate. In such case, except as may be otherwise provided in the relevant Award Agreement, all Options and Stock Appreciation Rights
with time-based vesting conditions or restrictions that are not vested and/or exercisable immediately prior to the effective time of the Sale Event shall become fully vested and exercisable as of the effective time of the Sale Event, all other
Awards with time-based vesting, conditions or restrictions shall become fully vested and nonforfeitable as of the effective time of the Sale Event, and all Awards with conditions and restrictions relating to the attainment of performance goals may
become vested and nonforfeitable in connection with a Sale Event in the Administrator’s discretion or to the extent specified in the relevant Award Agreement. In the event of such termination, (i) the Company shall have the option (in its
sole discretion) to make or provide for a payment, in cash or in kind, to the grantees holding Options and Stock Appreciation Rights, in exchange for the cancellation thereof, in an amount equal to the difference between (A) the Sale Price
multiplied by the number of shares of Stock subject to outstanding Options and Stock Appreciation Rights (to the extent then exercisable at prices not in excess of the Sale Price) and (B) the aggregate exercise price of all such outstanding
Options and Stock Appreciation Rights (provided that, in the case of an Option or Stock Appreciation Right with an exercise price equal to or greater than the Sale Price, such Option or Stock Appreciation Right shall be cancelled for no
consideration); or (ii) each grantee shall be permitted, within a specified period of time prior to the consummation of the Sale Event as determined by the Administrator, to exercise all outstanding Options and Stock Appreciation Rights (to the
extent then exercisable) held by such grantee. The Company shall also have the option (in its sole discretion) to make or provide for a payment, in cash or in kind, to the grantees holding other Awards in an amount equal to the Sale Price multiplied
by the number of vested shares of Stock under such Awards. 
  

	SECTION	 4. ELIGIBILITY 

Grantees under the Plan will be such employees, Non-Employee Directors or Consultants of the Company
and its Affiliates as are selected from time to time by the Administrator in its sole discretion; provided that Awards may not be granted to employees, Non-Employee Directors or Consultants who are providing
services only to any “parent” of the Company, as such term is defined in Rule 405 of the Act, unless (i) the stock underlying the Awards is treated as “service recipient stock” under Section 409A or (ii) the
Company has determined that such Awards are exempt from or otherwise comply with Section 409A. 

  
 7 

	SECTION	 5. STOCK OPTIONS 

(a) Award of Stock Options. The Administrator may grant Stock Options under the Plan. Any Stock Option granted under the Plan shall be
in such form as the Administrator may from time to time approve. 
 Stock Options granted under the Plan may be either Incentive Stock
Options or Non-Qualified Stock Options. Incentive Stock Options may be granted only to employees of the Company or any Subsidiary that is a “subsidiary corporation” within the meaning of
Section 424(f) of the Code. To the extent that any Option does not qualify as an Incentive Stock Option, it shall be deemed a Non-Qualified Stock Option. 

Stock Options granted pursuant to this Section 5 shall be subject to the following terms and conditions and shall contain such additional
terms and conditions, not inconsistent with the terms of the Plan, as the Administrator shall deem desirable. If the Administrator so determines, Stock Options may be granted in lieu of cash compensation at the optionee’s election, subject to
such terms and conditions as the Administrator may establish. 
 (b) Exercise Price. The exercise price per share for the Stock
covered by a Stock Option granted pursuant to this Section 5 shall be determined by the Administrator at the time of grant but shall not be less than 100 percent of the Fair Market Value on the date of grant. In the case of an Incentive
Stock Option that is granted to a Ten Percent Owner, the exercise price of such Incentive Stock Option shall be not less than 110 percent of the Fair Market Value on the date of grant. Notwithstanding the foregoing, Stock Options may be granted
with an exercise price per share that is less than 100 percent of the Fair Market Value on the date of grant (i) pursuant to a transaction described in, and in a manner consistent with, Section 424(a) of the Code, (ii) to
individuals who are not subject to U.S. income tax on the date of grant or (iii) if the Stock Option is otherwise except from or compliant with Section 409A. 

(c) Option Term. The term of each Stock Option shall be fixed by the Administrator, but no Stock Option shall be exercisable more than
ten years after the date the Stock Option is granted. In the case of an Incentive Stock Option that is granted to a Ten Percent Owner, the term of such Stock Option shall be no more than five years from the date of grant. 

(d) Exercisability; Rights of a Stockholder. Stock Options shall become exercisable at such time or times, whether or not in
installments, as shall be determined by the Administrator at or after the date of grant. The Administrator may at any time accelerate the exercisability of all or any portion of any Stock Option. An optionee shall have the rights of a stockholder
only as to shares acquired upon the exercise of a Stock Option and not as to unexercised Stock Options. 
 (e) Method of Exercise.
Stock Options may be exercised in whole or in part, by giving written or electronic notice of exercise to the Company, specifying the number of shares to be purchased. Payment of the purchase price may be made by one or more of the following methods
except to the extent otherwise provided in the Award Agreement: 
 (i) In cash, by certified or bank check or other instrument acceptable to
the Administrator; 

  
 8 

 (ii) Through the delivery (or attestation to the ownership following such procedures as the
Company may prescribe) of shares of Stock that are not then subject to restrictions under any Company plan. Such surrendered shares shall be valued at Fair Market Value on the exercise date; 

(iii) By the optionee delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to
promptly deliver to the Company cash or a check payable and acceptable to the Company for the purchase price; provided that in the event the optionee chooses to pay the purchase price as so provided, the optionee and the broker shall comply with
such procedures and enter into such agreements of indemnity and other agreements as the Company shall prescribe as a condition of such payment procedure; or 

(iv) With respect to Stock Options that are not Incentive Stock Options, by a “net exercise” arrangement pursuant to which the
Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value that does not exceed the aggregate exercise price. 

Payment instruments will be received subject to collection. The transfer to the optionee on the records of the Company or of the transfer agent of the shares
of Stock to be purchased pursuant to the exercise of a Stock Option will be contingent upon receipt from the optionee (or a purchaser acting in his stead in accordance with the provisions of the Stock Option) by the Company of the full purchase
price for such shares and the fulfillment of any other requirements contained in the Award Agreement or applicable provisions of laws (including the satisfaction of any taxes that the Company or an Affiliate is obligated to withhold with respect to
the optionee). In the event an optionee chooses to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock transferred to the optionee upon the exercise of the Stock Option shall be
net of the number of attested shares. In the event that the Company establishes, for itself or using the services of a third party, an automated system for the exercise of Stock Options, such as a system using an internet website or interactive
voice response, then the paperless exercise of Stock Options may be permitted through the use of such an automated system. 
 (f) Annual
Limit on Incentive Stock Options. To the extent required for “incentive stock option” treatment under Section 422 of the Code, the aggregate Fair Market Value (determined as of the time of grant) of the shares of Stock with
respect to which Incentive Stock Options granted under this Plan and any other plan of the Company or its parent and subsidiary corporations become exercisable for the first time by an optionee during any calendar year shall not exceed $100,000. To
the extent that any Stock Option exceeds this limit, it shall constitute a Non-Qualified Stock Option. 
  

	SECTION	 6. STOCK APPRECIATION RIGHTS 

(a) Award of Stock Appreciation Rights. The Administrator may grant Stock Appreciation Rights under the Plan. A Stock Appreciation Right
is an Award entitling the recipient to receive shares of Stock (or cash, to the extent explicitly provided for in the applicable Award Agreement) having a value equal to the excess of the Fair Market Value of a share of Stock on the date of exercise
over the exercise price of the Stock Appreciation Right multiplied by the number of shares of Stock with respect to which the Stock Appreciation Right shall have been exercised. 

  
 9 

 (b) Exercise Price of Stock Appreciation Rights. The exercise price of a Stock
Appreciation Right shall not be less than 100 percent of the Fair Market Value of the Stock on the date of grant. Notwithstanding the foregoing, Stock Appreciation Rights may be granted with an exercise price per share that is less than
100 percent of the Fair Market Value on the date of grant (i) pursuant to a transaction described in, and in a manner consistent with, Section 424(a) of the Code, (ii) to individuals who are not subject to U.S. income tax on the
date of grant or (iii) if the Stock Appreciation Right is otherwise exempt from or compliant with Section 409A. 
 (c) Grant and
Exercise of Stock Appreciation Rights. Stock Appreciation Rights may be granted by the Administrator independently of any Stock Option granted pursuant to Section 5 of the Plan. 

(d) Terms and Conditions of Stock Appreciation Rights. Stock Appreciation Rights shall be subject to such terms and conditions as shall
be determined on the date of grant by the Administrator. The term of a Stock Appreciation Right may not exceed ten years. The terms and conditions of each such Award shall be determined by the Administrator, and such terms and conditions may differ
among individual Awards and grantees. 
  

	SECTION	 7. RESTRICTED STOCK AWARDS 

(a) Nature of Restricted Stock Awards. The Administrator may grant Restricted Stock Awards under the Plan. A Restricted Stock Award is
any Award of Restricted Shares subject to such restrictions and conditions as the Administrator may determine at the time of grant. Conditions may be based on continuing employment (or other Service Relationship) and/or achievement of pre-established performance goals and objectives. 
 (b) Rights as a Stockholder. Upon the grant of
the Restricted Stock Award and payment of any applicable purchase price, a grantee shall have the rights of a stockholder with respect to the voting of the Restricted Shares and receipt of dividends; provided that if the lapse of restrictions with
respect to the Restricted Stock Award is tied to the attainment of vesting conditions, any dividends paid by the Company shall accrue and shall not be paid to the grantee until and to the extent the vesting conditions are met with respect to the
Restricted Stock Award. Unless the Administrator shall otherwise determine, (i) uncertificated Restricted Shares shall be accompanied by a notation on the records of the Company or the transfer agent to the effect that they are subject to
forfeiture until such Restricted Shares are vested as provided in Section 7(d) below, and (ii) certificated Restricted Shares shall remain in the possession of the Company until such Restricted Shares are vested as provided in
Section 7(d) below, and the grantee shall be required, as a condition of the grant, to deliver to the Company such instruments of transfer as the Administrator may prescribe. 

  
 10 

 (c) Restrictions. Restricted Shares may not be sold, assigned, transferred, pledged
or otherwise encumbered or disposed of except as specifically provided herein or in the Restricted Stock Award Agreement. Except as may otherwise be provided by the Administrator either in the Award Agreement or, subject to Section 16 below, in
writing after the Award is issued, if a grantee’s employment (or other Service Relationship) with the Company and its Affiliates terminates for any reason, any Restricted Shares that have not vested at the time of termination shall
automatically and without any requirement of notice to such grantee from or other action by or on behalf of, the Company be deemed to have been reacquired by the Company at its original purchase price (if any) from such grantee or such
grantee’s legal representative simultaneously with such termination of employment (or other Service Relationship), and thereafter shall cease to represent any ownership of the Company by the grantee or rights of the grantee as a stockholder.
Following such deemed reacquisition of Restricted Shares that are represented by physical certificates, a grantee shall surrender such certificates to the Company upon request without consideration. 

(d) Vesting of Restricted Shares. The Administrator at the time of grant shall specify the date or dates and/or the attainment of pre-established performance goals, objectives and other conditions on which the non-transferability of the Restricted Shares and the Company’s right of repurchase or
forfeiture shall lapse. Subsequent to such date or dates and/or the attainment of such pre-established performance goals, objectives and other conditions, the shares on which all restrictions have lapsed shall
no longer be Restricted Shares and shall be deemed “vested.” 
  

	SECTION	 8. RESTRICTED STOCK UNITS 

(a) Nature of Restricted Stock Units. The Administrator may grant Restricted Stock Units under the Plan. A Restricted Stock Unit is an
Award of stock units that may be settled in shares of Stock (or cash, to the extent explicitly provided for in the Award Agreement) upon the satisfaction of such restrictions and conditions at the time of grant. Conditions may be based on continuing
employment (or other Service Relationship) and/or achievement of pre-established performance goals and objectives. The terms and conditions of each such Award shall be determined by the Administrator, and such
terms and conditions may differ among individual Awards and grantees. Restricted Stock Units with deferred settlement dates are subject to Section 409A and shall contain such additional terms and conditions as the Administrator shall determine
in its sole discretion in order to comply with the requirements of Section 409A. 
 (b) Election to Receive Restricted Stock Units in
Lieu of Compensation. The Administrator may, in its sole discretion, permit a grantee to elect to receive a portion of future cash compensation otherwise due to such grantee in the form of an award of Restricted Stock Units. Any such election
shall be made in writing and shall be delivered to the Company no later than the date specified by the Administrator and in accordance with Section 409A and such other rules and procedures established by the Administrator. Any such future cash
compensation that the grantee elects to defer shall be converted to a fixed number of Restricted Stock Units based on the Fair Market Value of Stock on the date the compensation would otherwise have been paid to the grantee if such payment had not
been deferred as provided herein. The Administrator shall have the sole right to determine whether and under what circumstances to permit such elections and to impose such limitations and other terms and conditions thereon as the Administrator deems
appropriate. Any Restricted Stock Units that are elected to be received in lieu of cash compensation shall be fully vested, unless otherwise provided in the Award Agreement. 

  
 11 

 (c) Rights as a Stockholder. A grantee shall have the rights as a stockholder only as
to shares of Stock acquired by the grantee upon settlement of Restricted Stock Units; provided, however, that the grantee may be credited with Dividend Equivalent Rights with respect to the stock units underlying his or her Restricted Stock Units,
subject to the provisions of Section 11 and such terms and conditions as the Administrator may determine. 
 (d) Termination.
Except as may otherwise be provided by the Administrator either in the Award Agreement or, subject to Section 16 below, in writing after the Award is issued, a grantee’s right in all Restricted Stock Units that have not vested shall
automatically terminate upon the grantee’s termination of employment (or cessation of Service Relationship) with the Company and its Affiliates for any reason. 
  

	SECTION	 9. UNRESTRICTED STOCK AWARDS 

Grant or Sale of Unrestricted Stock. The Administrator may grant (or sell at par value or such higher purchase price determined by the
Administrator) an Unrestricted Stock Award under the Plan. An Unrestricted Stock Award is an Award pursuant to which the grantee may receive shares of Stock free of any restrictions under the Plan. Unrestricted Stock Awards may be granted in respect
of past services or other valid consideration, or in lieu of cash compensation due to such grantee. 
  

	SECTION	 10. CASH-BASED AWARDS 

Grant of Cash-Based Awards. The Administrator may grant Cash-Based Awards under the Plan. A Cash-Based Award is an Award that entitles
the grantee to a payment in cash upon the attainment of specified performance goals, including continued employment (or other Service Relationship). The Administrator shall determine the maximum duration of the Cash-Based Award, the amount of cash
to which the Cash-Based Award pertains, the conditions upon which the Cash-Based Award shall become vested or payable, and such other provisions as the Administrator shall determine. Each Cash-Based Award shall specify a cash-denominated payment
amount, formula or payment ranges as determined by the Administrator. Payment, if any, with respect to a Cash-Based Award shall be made in accordance with the terms of the Award and may be made in cash. 

 

	SECTION	 11. DIVIDEND EQUIVALENT RIGHTS 

(a) Dividend Equivalent Rights. The Administrator may grant Dividend Equivalent Rights under the Plan. A Dividend Equivalent Right is an
Award entitling the grantee to receive credits based on cash dividends that would have been paid on the shares of Stock specified in the Dividend Equivalent Right (or other Award to which it relates) if such shares had been issued to the grantee. A
Dividend Equivalent Right may be granted hereunder to any grantee as a component of an award of Restricted Stock Units or as a freestanding award. The terms and conditions of Dividend Equivalent Rights shall be specified in the Award Agreement.
Dividend equivalents credited to the holder of a Dividend Equivalent Right may be paid currently or may be deemed to be reinvested in additional shares of Stock, which may thereafter accrue additional equivalents. Any such reinvestment shall be at
Fair Market Value on the date of reinvestment or such other price as may then apply under a dividend reinvestment plan sponsored by the 

  
 12 

 
Company, if any. Dividend Equivalent Rights may be settled in cash or shares of Stock or a combination thereof, in a single installment or installments. A Dividend Equivalent Right granted as a
component of an Award of Restricted Stock Units shall provide that such Dividend Equivalent Right shall be settled only upon settlement or payment of, or lapse of restrictions on, such other Award, and that such Dividend Equivalent Right shall
expire or be forfeited or annulled under the same conditions as such other Award. 
 (b) Termination. Except as may otherwise be
provided by the Administrator either in the Award Agreement or, subject to Section 16 below, in writing after the Award is issued, a grantee’s rights in all Dividend Equivalent Rights shall automatically terminate upon the grantee’s
termination of employment (or cessation of Service Relationship) with the Company and its Affiliates for any reason. 
  

	SECTION	 12. TRANSFERABILITY OF AWARDS 

(a) Transferability. Except as provided in Section 12(b) below or otherwise determined by the Administrator, during a
grantee’s lifetime, his or her Awards shall be exercisable only by the grantee, or by the grantee’s legal representative or guardian in the event of the grantee’s incapacity. No Awards shall be sold, assigned, transferred or otherwise
encumbered or disposed of by a grantee other than by will or by the laws of descent and distribution or pursuant to a domestic relations order. No Awards shall be subject, in whole or in part, to attachment, execution, or levy of any kind, and any
purported transfer in violation hereof shall be null and void. 
 (b) Administrator Action. Notwithstanding Section 12(a), the
Administrator, in its discretion, may provide either in the Award Agreement regarding a given Award or by subsequent written approval that the grantee (who is an employee or Non-Employee Director) may transfer
his or her Non-Qualified Stock Options to his or her immediate family members, to trusts for the benefit of such family members, or to partnerships in which such family members are the only partners, provided
that the transferee agrees in writing with the Company to be bound by all of the terms and conditions of this Plan and the applicable Award Agreement. In no event may an Award be transferred by a grantee for value. 

(c) Family Member. For purposes of Section 12(b), “family member” shall mean a grantee’s child, stepchild,
grandchild, parent, stepparent, grandparent, spouse, former spouse, sibling, niece, nephew, mother-in-law, father-in-law, son-in-law, daughter-in-law, brother-in-law, or sister-in-law, including adoptive relationships, any person sharing the
grantee’s household (other than a tenant of the grantee), a trust in which these persons (or the grantee) have more than 50 percent of the beneficial interest, a foundation in which these persons (or the grantee) control the management of
assets, and any other entity in which these persons (or the grantee) own more than 50 percent of the voting interests. 
 (d)
Designation of Beneficiary. To the extent permitted by the Company and valid under applicable law, each grantee to whom an Award has been made under the Plan may designate a beneficiary or beneficiaries to exercise any Award or receive any
payment under any Award payable on or after the grantee’s death. Any such designation shall be on a form provided for that purpose by the Administrator and shall not be effective until received by the Administrator. If no beneficiary has been
designated by a deceased grantee, or if the designated beneficiaries have predeceased the grantee, the beneficiary shall be the grantee’s estate or legal heirs. 

  
 13 

	SECTION	 13. TAX WITHHOLDING 

(a) Payment by Grantee. Each grantee shall, no later than the date as of which the value of an Award or of any Stock or other amounts
received thereunder first becomes includable in the gross income of the grantee for tax purposes, pay to the Company or any applicable Affiliate, or make arrangements satisfactory to the Administrator regarding payment of, any U.S. and non-U.S. federal, state, or local taxes of any kind required by law to be withheld by the Company or any applicable Affiliate with respect to such income. The Company and its Affiliates shall, to the extent
permitted by law, have the right to deduct any such taxes from any payment of any kind otherwise due to the grantee or to satisfy any applicable withholding obligations by any other method of withholding that the Company and its Affiliates deem
appropriate. The Company’s obligation to deliver evidence of book entry (or stock certificates) to any grantee is subject to and conditioned on tax withholding obligations being satisfied by the grantee. 

(b) Payment in Stock. The Administrator may cause any tax withholding obligation of the Company or any applicable Affiliate to be
satisfied, in whole or in part, by the Company withholding from shares of Stock to be issued pursuant to any Award a number of shares with an aggregate Fair Market Value (as of the date the withholding is effected) that would satisfy the withholding
amount due; provided, however, that the amount withheld does not exceed the maximum statutory rate or such lesser amount as is necessary to avoid liability accounting treatment. For purposes of share withholding, the Fair Market Value of withheld
shares shall be determined in the same manner as the value of Stock includible in income of the grantees. The Administrator may also require any tax withholding obligation of the Company or any applicable Affiliate to be satisfied, in whole or in
part, by an arrangement whereby a certain number of shares of Stock issued pursuant to any Award are immediately sold and proceeds from such sale are remitted to the Company or any applicable Affiliate in an amount that would satisfy the withholding
amount due. 
  

	SECTION	 14. SECTION 409A AWARDS 

Awards are intended to be exempt from Section 409A to the greatest extent possible and to otherwise comply with Section 409A. The
Plan and all Awards shall be interpreted in accordance with such intent. To the extent that any Award is determined to constitute “nonqualified deferred compensation” within the meaning of Section 409A (a “409A Award”), the
Award shall be subject to such additional rules and requirements as specified by the Administrator from time to time in order to comply with Section 409A. In this regard, if any amount under a 409A Award is payable upon a “separation from
service” (within the meaning of Section 409A) to a grantee who is then considered a “specified employee” (within the meaning of Section 409A), then no such payment shall be made prior to the date that is the earlier of
(i) six months and one day after the grantee’s separation from service, or (ii) the grantee’s death, but only to the extent such delay is necessary to prevent such payment from being subject to interest, penalties and/or
additional tax imposed pursuant to Section 409A. Further, the settlement of any 

  
 14 

 
409A Award may not be accelerated except to the extent permitted by Section 409A. The Company makes no representation that any or all of the payments or benefits described in the Plan will
be exempt from or comply with Section 409A of the Code and makes no undertaking to preclude Section 409A of the Code from applying to any such payment. The grantee shall be solely responsible for the payment of any taxes and penalties
incurred under Section 409A. 
  

	SECTION	 15. TERMINATION OF SERVICE RELATIONSHIP, TRANSFER, LEAVE OF ABSENCE, ETC. 

(a) Termination of Service Relationship. If the grantee’s Service Relationship is with an Affiliate and such Affiliate ceases to be
an Affiliate, the grantee shall be deemed to have terminated his or her Service Relationship for purposes of the Plan. 
 (b) For purposes of
the Plan, the following events shall not be deemed a termination of a Service Relationship: 
 (i) a transfer to the Service Relationship of
the Company from an Affiliate or from the Company to an Affiliate, or from one Affiliate to another; or 
 (ii) an approved leave of absence,
if the employee’s right to re-employment is guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was granted or if the Administrator otherwise so
provides in writing. 
  

	SECTION	 16. AMENDMENTS AND TERMINATION 

The Board may, at any time, amend or discontinue the Plan and the Administrator may, at any time, amend or cancel any outstanding Award for the
purpose of satisfying changes in law or for any other lawful purpose, but no such action shall materially and adversely affect rights under any outstanding Award without the holder’s consent. The Administrator is specifically authorized to
exercise its discretion to reduce the exercise price of outstanding Stock Options or Stock Appreciation Rights, or effect the repricing of such Awards through cancellation and re-grants or cancellation of
Stock Options or Stock Appreciation Rights in exchange for cash or other Awards. To the extent required under the rules of any securities exchange or market system on which the Stock is listed, or to the extent determined by the Administrator to be
required by the Code to ensure that Incentive Stock Options granted under the Plan are qualified under Section 422 of the Code, Plan amendments shall be subject to approval by Company stockholders. Nothing in this Section 16 shall limit
the Administrator’s authority to take any action permitted pursuant to Section 3(c) or 3(d). 
  

	SECTION	 17. STATUS OF PLAN 

With respect to the portion of any Award that has not been exercised and any payments in cash, Stock or other consideration not received by a
grantee, a grantee shall have no rights greater than those of a general creditor of the Company unless the Administrator shall otherwise expressly determine in connection with any Award or Awards. In its sole discretion, the Administrator may
authorize the creation of trusts or other arrangements to meet the Company’s obligations to deliver Stock or make payments with respect to Awards hereunder, provided that the existence of such trusts or other arrangements is consistent with the
foregoing sentence. 

  
 15 

	SECTION	 18. GENERAL PROVISIONS 

(a) No Distribution. The Administrator may require each person acquiring Stock pursuant to an Award to represent to and agree with the
Company in writing that such person is acquiring the shares without a view to distribution thereof. 
 (b) Issuance of Stock. To the
extent certificated, stock certificates to grantees under this Plan shall be deemed delivered for all purposes when the Company or a stock transfer agent of the Company shall have mailed such certificates in the United States mail, addressed to the
grantee, at the grantee’s last known address on file with the Company. Uncertificated Stock shall be deemed delivered for all purposes when the Company or a Stock transfer agent of the Company shall have given to the grantee by electronic mail
(with proof of receipt) or by United States mail, addressed to the grantee, at the grantee’s last known address on file with the Company, notice of issuance and recorded the issuance in its records (which may include electronic “book
entry” records). Notwithstanding anything herein to the contrary, the Company shall not be required to issue or deliver any evidence of book entry or certificates evidencing shares of Stock pursuant to the exercise or settlement of any Award,
unless and until the Administrator has determined, with advice of counsel (to the extent the Administrator deems such advice necessary or advisable), that the issuance and delivery is in compliance with all applicable laws, regulations of
governmental authorities and, if applicable, the requirements of any exchange on which the shares of Stock are listed, quoted or traded. Any Stock issued pursuant to the Plan shall be subject to any stop-transfer orders and other restrictions as the
Administrator deems necessary or advisable to comply with federal, state or foreign jurisdiction, securities or other laws, rules and quotation system on which the Stock is listed, quoted or traded. The Administrator may place legends on any Stock
certificate or notations on any book entry to reference restrictions applicable to the Stock. In addition to the terms and conditions provided herein, the Administrator may require that an individual make such reasonable covenants, agreements, and
representations as the Administrator, in its discretion, deems necessary or advisable in order to comply with any such laws, regulations, or requirements. The Administrator shall have the right to require any individual to comply with any timing or
other restrictions with respect to the settlement or exercise of any Award, including a window-period limitation, as may be imposed in the discretion of the Administrator. 

(c) Stockholder Rights. Until Stock is deemed delivered in accordance with Section 18(b), no right to vote or receive dividends or
any other rights of a stockholder will exist with respect to shares of Stock to be issued in connection with an Award, notwithstanding the exercise of a Stock Option or any other action by the grantee with respect to an Award. 

(d) Other Incentive Arrangements; No Rights to Continued Service Relationship. Nothing contained in this Plan shall prevent the Board
from adopting other or additional incentive arrangements, including trusts, and such arrangements may be either generally applicable or applicable only in specific cases. The adoption of this Plan and the grant of Awards do not confer upon any
grantee any right to continued employment or other Service Relationship with the Company or any Affiliate. 

  
 16 

 (e) Trading Policy Restrictions. Option exercises and other Awards under the Plan
shall be subject to the Company’s insider trading policies and procedures, as in effect from time to time. 
 (f) Clawback
Policy. Awards under the Plan shall be subject to the Company’s clawback policy, as in effect from time to time. 
 (g)
Fractional Shares. No fractional Shares shall be issued or delivered pursuant to the Plan or any Award, and the Administrator shall determine whether cash, other securities or other property shall be paid or transferred in lieu of any
fractional Shares, or whether such fractional Shares or nay rights thereto shall be cancelled, terminated or otherwise eliminated. 
  

	SECTION	 19. EFFECTIVE DATE OF PLAN 

This Plan shall become effective upon the date immediately preceding the Registration Date subject to prior stockholder approval in accordance
with applicable state law, the Company’s bylaws and articles of incorporation, and applicable stock exchange rules. No grants of Awards may be made hereunder after the tenth anniversary of the Effective Date and no grants of Incentive Stock
Options may be made hereunder after the tenth anniversary of the date the Plan is approved by the Board. 
  

	SECTION	 20. GOVERNING LAW 

This Plan and all Awards and actions taken thereunder shall be governed by, and construed in accordance with the General Corporation Law of the
State of Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of the State of Delaware applied without regard to conflict of law principles. 

DATE APPROVED BY BOARD OF DIRECTORS: June 18, 2021 
 DATE
APPROVED BY STOCKHOLDERS: June 18, 2021 

  
 17 

 INCENTIVE STOCK OPTION AGREEMENT 

UNDER THE GRAPHITE BIO, INC. 

2021 STOCK OPTION AND INCENTIVE PLAN 
  

			
	Name of Optionee:	  	                                      
                                         
             
		
	No. of Option Shares:	  	                                    

		
	Option Exercise Price per Share:	  	$                                  
		  	[FMV on Grant Date (110% of FMV if a 10% owner)]
		
	Grant Date:	  	                                    

		
	Expiration Date:	  	                                    

		  	[up to 10 years (5 if a 10% owner)]

 Pursuant to the Graphite Bio, Inc. 2021 Stock Option and Incentive Plan as amended through the date hereof
(the “Plan”), Graphite Bio, Inc. (the “Company”) hereby grants to the Optionee named above an option (the “Stock Option”) to purchase on or prior to the Expiration Date specified above all or part of the number of
shares of Common Stock, par value $0.00001 per share (the “Stock”), of the Company specified above at the Option Exercise Price per Share specified above subject to the terms and conditions set forth herein and in the Plan. 

1. Exercisability Schedule. No portion of this Stock Option may be exercised until such portion shall have become exercisable. Except
as set forth below, and subject to the discretion of the Administrator (as defined in Section 2 of the Plan) to accelerate the exercisability schedule hereunder, this Stock Option shall be exercisable as follows:
____________________________________,1 so long as the Optionee continues to have a Service Relationship with the Company or a Subsidiary on such dates. 

Once exercisable, this Stock Option shall continue to be exercisable at any time or times prior to the close of business on the Expiration
Date, subject to the provisions hereof and of the Plan. 
 2. Manner of Exercise. 

(a) The Optionee may exercise this Stock Option only in the following manner: from time to time on or prior to the Expiration Date of this
Stock Option, the Optionee may give written notice to the Administrator of his or her election to purchase some or all of the Option Shares purchasable at the time of such notice. This notice shall specify the number of Option Shares to be
purchased. 
  

	1 	 Note to Form: Maximum of $100,000 per year to qualify as an incentive stock option. 

 Payment of the purchase price for the Option Shares may be made by one or more of the
following methods: (i) in cash, by certified or bank check or other instrument acceptable to the Administrator; (ii) through the delivery (or attestation to the ownership) of shares of Stock that have been purchased by the Optionee on the
open market or that are beneficially owned by the Optionee and are not then subject to any restrictions under any Company plan and that otherwise satisfy any holding periods as may be required by the Administrator; or (iii) by the Optionee
delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable to the Company to pay the option purchase price, provided that
in the event the Optionee chooses to pay the option purchase price as so provided, the Optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Administrator shall prescribe as
a condition of such payment procedure; or (iv) a combination of (i), (ii) and (iii) above. Payment instruments will be received subject to collection. 

The transfer to the Optionee on the records of the Company or of the transfer agent of the Option Shares will be contingent upon (i) the
Company’s receipt from the Optionee of the full purchase price for the Option Shares, as set forth above, (ii) the fulfillment of any other requirements contained herein or in the Plan or in any other agreement or provision of laws, and
(iii) the receipt by the Company of any agreement, statement or other evidence that the Company may require to satisfy itself that the issuance of Stock to be purchased pursuant to the exercise of Stock Options under the Plan and any subsequent
resale of the shares of Stock will be in compliance with applicable laws and regulations. In the event the Optionee chooses to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock
transferred to the Optionee upon the exercise of the Stock Option shall be net of the Shares attested to. 
 (b) The shares of Stock
purchased upon exercise of this Stock Option shall be transferred to the Optionee on the records of the Company or of the transfer agent upon compliance to the satisfaction of the Administrator with all requirements under applicable laws or
regulations in connection with such transfer and with the requirements hereof and of the Plan. The determination of the Administrator as to such compliance shall be final and binding on the Optionee. The Optionee shall not be deemed to be the holder
of, or to have any of the rights of a holder with respect to, any shares of Stock subject to this Stock Option unless and until this Stock Option shall have been exercised pursuant to the terms hereof, the Company or the transfer agent shall have
transferred the shares to the Optionee, and the Optionee’s name shall have been entered as the stockholder of record on the books of the Company. Thereupon, the Optionee shall have full voting, dividend and other ownership rights with respect
to such shares of Stock. 
 (c) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be
exercisable after the Expiration Date hereof. 
 3. Termination of Service Relationship. If the Optionee’s Service Relationship
with the Company or a Subsidiary (as defined in the Plan) is terminated, the period within which to exercise the Stock Option may be subject to earlier termination as set forth below. 

  
 2 

 (a) Termination Due to Death. If the Optionee’s Service Relationship with the
Company or a Subsidiary terminates by reason of the Optionee’s death, any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of death, may thereafter be exercised by the Optionee’s legal
representative or legatee for a period of 12 months from the date of death or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of death shall terminate immediately and be of no further force
or effect. 
 (b) Termination Due to Disability. If the Optionee’s Service Relationship with the Company or a Subsidiary
terminates by reason of the Optionee’s disability (as determined by the Administrator), any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of such termination, may thereafter be exercised by the
Optionee for a period of 12 months from the date the Optionee’s Service Relationship is terminated by reason of the Optionee’s disability or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on
the date of the termination of the Optionee’s Service Relationship by reason of the Optionee’s disability shall terminate immediately and be of no further force or effect. 

(c) Termination for Cause. If the Optionee’s Service Relationship with the Company or a Subsidiary terminates for Cause, any
portion of this Stock Option outstanding on such date shall terminate immediately and be of no further force and effect. For purposes hereof, “Cause” shall mean, unless otherwise provided in an employment or service agreement between the
Company and the Optionee, a determination by the Administrator that the Optionee shall be dismissed as a result of (i) any material breach by the Optionee of any agreement between the Optionee and the Company; (ii) the conviction
of, indictment for or plea of nolo contendere by the Optionee to a felony or a crime involving moral turpitude; or (iii) any material misconduct or willful and deliberate non-performance (other than by
reason of disability) by the Optionee of the Optionee’s duties to the Company. 
 (d) Other Termination. If the Optionee’s
Service Relationship with the Company or a Subsidiary terminates for any reason other than the Optionee’s death, the Optionee’s disability, or Cause, and unless otherwise determined by the Administrator, any portion of this Stock Option
outstanding on such date may be exercised, to the extent exercisable on the date of termination, for a period of three months from the date of termination or until the Expiration Date, if earlier. Any portion of this Stock Option that is not
exercisable on the date of termination shall terminate immediately and be of no further force or effect. 
 The Administrator’s
determination of the reason for termination of the Optionee’s Service Relationship with the Company or a Subsidiary shall be conclusive and binding on the Optionee and his or her representatives or legatees. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by all
the terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified
herein. 

  
 3 

 5. Transferability. This Agreement is personal to the Optionee, is non-assignable and is not transferable in any manner, by operation of law or otherwise, other than by will or the laws of descent and distribution. This Stock Option is exercisable, during the Optionee’s
lifetime, only by the Optionee, and thereafter, only by the Optionee’s legal representative or legatee. 
 6. Status of the Stock
Option. This Stock Option is intended to qualify as an “incentive stock option” under Section 422 of the Internal Revenue Code of 1986, as amended (the “Code”), but the Company does not represent or warrant that this
Stock Option qualifies as such. The Optionee should consult with his or her own tax advisors regarding the tax effects of this Stock Option and the requirements necessary to obtain favorable income tax treatment under Section 422 of the Code,
including, but not limited to, holding period requirements and that this Stock Option must be exercised within three months after termination of employment as an employee (or 12 months in the case of death or disability) to qualify as an
“incentive stock option.” To the extent any portion of this Stock Option does not so qualify as an “incentive stock option,” such portion shall be deemed to be a non-qualified stock
option. If the Optionee intends to dispose or does dispose (whether by sale, gift, transfer or otherwise) of any Option Shares within the one-year period beginning on the date after the transfer of such shares
to him or her, or within the two-year period beginning on the day after the grant of this Stock Option, he or she will so notify the Company within 30 days after such disposition. 

7. Tax Withholding. The Optionee shall, not later than the date as of which the exercise of this Stock Option becomes a taxable event
for Federal income tax purposes, pay to the Company or make arrangements satisfactory to the Administrator for payment of any Federal, state, and local taxes required by law to be withheld on account of such taxable event. The Company shall have the
authority to cause the required tax withholding obligation to be satisfied, in whole or in part, by (i) withholding from shares of Stock to be issued to the Optionee a number of shares of Stock with an aggregate Fair Market Value that would
satisfy the withholding amount due; or (ii) causing its transfer agent to sell from the number of shares of Stock to be issued to the Optionee, the number of shares of Stock necessary to satisfy the Federal, state and local taxes required by
law to be withheld from the Optionee on account of such transfer. 
 8. No Obligation to Continue Service Relationship. Neither the
Company nor any Subsidiary is obligated by or as a result of the Plan or this Agreement to continue the Optionee in a Service Relationship with the Company or a Subsidiary and neither the Plan nor this Agreement shall interfere in any way with the
right of the Company or any Subsidiary to terminate the Optionee’s Service Relationship with the Company or a Subsidiary at any time. 

9. Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes
all prior agreements and discussions between the parties concerning such subject matter. 
 10. Data Privacy Consent. In order to
administer the Plan and this Agreement and to implement or structure future equity grants, the Company, its subsidiaries and affiliates and certain agents thereof (together, the “Relevant Companies”) may process any and all personal or
professional data, including but not limited to Social Security or other identification number, 

  
 4 

 
home address and telephone number, date of birth and other information that is necessary or desirable for the administration of the Plan and/or this Agreement (the “Relevant
Information”). By entering into this Agreement, the Optionee (i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant Information; (ii) waives any privacy rights the Optionee may
have with respect to the Relevant Information; (iii) authorizes the Relevant Companies to store and transmit such information in electronic form; and (iv) authorizes the transfer of the Relevant Information to any jurisdiction in which the
Relevant Companies consider appropriate. The Optionee shall have access to, and the right to change, the Relevant Information. Relevant Information will only be used in accordance with applicable law. 

11. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Optionee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

 

			
	Graphite Bio, Inc.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Optionee (including through an online acceptance process) is acceptable. 
  

					
	Dated:                     	 	                        	  	  

		 		  	Optionee’s Signature
			
		 		  	Optionee’s name and address:
			
		 		  	  

			
		 		  	  

			
		 		  	  

  
 5 

 NON-QUALIFIED STOCK OPTION AGREEMENT 

FOR COMPANY CONSULTANTS 

UNDER THE GRAPHITE BIO, INC. 

2021 STOCK OPTION AND INCENTIVE PLAN 
  

			
	Name of Optionee:	  	                                      
                                      
		
	No. of Option Shares:	  	                                
		
	Option Exercise Price per Share:	  	$                              
		
	Grant Date:	  	                                
		
	Vesting Commencement Date	  	                                
		
	Expiration Date:	  	                                

 Pursuant to the Graphite Bio, Inc. 2021 Stock Option and Incentive Plan as amended through the date hereof
(the “Plan”), Graphite Bio, Inc. (the “Company”) hereby grants to the Optionee named above an option (the “Stock Option”) to purchase on or prior to the Expiration Date specified above all or part of the number of
shares of Common Stock, par value $0.00001 per share (the “Stock”) of the Company specified above at the Option Exercise Price per Share specified above subject to the terms and conditions set forth herein and in the Plan. This Stock
Option is not intended to be an “incentive stock option” under Section 422 of the Internal Revenue Code of 1986, as amended. 

1. Exercisability Schedule. No portion of this Stock Option may be exercised until such portion shall have become exercisable. Except
as set forth below, and subject to the discretion of the Administrator (as defined in Section 2 of the Plan) to accelerate the exercisability schedule hereunder, this Stock Option shall be exercisable as follows: 

[_______________________________________], so long as Optionee continues to have a Service Relationship with the Company or a Subsidiary on
such dates. 
 Once exercisable, this Stock Option shall continue to be exercisable at any time or times prior to the close of business on
the Expiration Date, subject to the provisions hereof and of the Plan. 
 2. Manner of Exercise. 

(a) The Optionee may exercise this Stock Option only in the following manner: from time to time on or prior to the Expiration Date of this
Stock Option, the Optionee may give written notice to the Administrator of his or her election to purchase some or all of the Option Shares purchasable at the time of such notice. This notice shall specify the number of Option Shares to be
purchased. 

 Payment of the purchase price for the Option Shares may be made by one or more of the
following methods: (i) in cash, by certified or bank check or other instrument acceptable to the Administrator; (ii) through the delivery (or attestation to the ownership) of shares of Stock that have been purchased by the Optionee on the
open market or that are beneficially owned by the Optionee and are not then subject to any restrictions under any Company plan and that otherwise satisfy any holding periods as may be required by the Administrator; (iii) by the Optionee
delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable to the Company to pay the option purchase price, provided that
in the event the Optionee chooses to pay the option purchase price as so provided, the Optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Administrator shall prescribe as
a condition of such payment procedure; (iv) by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value
that does not exceed the aggregate exercise price; or (v) a combination of (i), (ii), (iii) and (iv) above. Payment instruments will be received subject to collection. 

The transfer to the Optionee on the records of the Company or of the transfer agent of the Option Shares will be contingent upon (i) the
Company’s receipt from the Optionee of the full purchase price for the Option Shares, as set forth above, (ii) the fulfillment of any other requirements contained herein or in the Plan or in any other agreement or provision of laws, and
(iii) the receipt by the Company of any agreement, statement or other evidence that the Company may require to satisfy itself that the issuance of Stock to be purchased pursuant to the exercise of Stock Options under the Plan and any subsequent
resale of the shares of Stock will be in compliance with applicable laws and regulations. In the event the Optionee chooses to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock
transferred to the Optionee upon the exercise of the Stock Option shall be net of the Shares attested to. 
 (b) The shares of Stock
purchased upon exercise of this Stock Option shall be transferred to the Optionee on the records of the Company or of the transfer agent upon compliance to the satisfaction of the Administrator with all requirements under applicable laws or
regulations in connection with such transfer and with the requirements hereof and of the Plan. The determination of the Administrator as to such compliance shall be final and binding on the Optionee. The Optionee shall not be deemed to be the holder
of, or to have any of the rights of a holder with respect to, any shares of Stock subject to this Stock Option unless and until this Stock Option shall have been exercised pursuant to the terms hereof, the Company or the transfer agent shall have
transferred the shares to the Optionee, and the Optionee’s name shall have been entered as the stockholder of record on the books of the Company. Thereupon, the Optionee shall have full voting, dividend and other ownership rights with respect
to such shares of Stock. 
 (c) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be
exercisable after the Expiration Date hereof. 

  
 2 

 3. Termination of Service Relationship. Except as may otherwise be provided by the
Administrator, if the Optionee’s Service Relationship with the Company or a Subsidiary (as defined in the Plan) is terminated, the period within which to exercise the Stock Option may be subject to earlier termination as set forth below. 

(a) Termination Due to Death. If the Optionee’s Service Relationship with the Company or a Subsidiary terminates by reason of the
Optionee’s death, any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of death, may thereafter be exercised by the Optionee’s legal representative or legatee for a period of 12 months from the
date of death or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of death shall terminate immediately and be of no further force or effect. 

(b) Termination Due to Disability. If the Optionee’s Service Relationship with the Company or a Subsidiary terminates by reason of
the Optionee’s disability (as determined by the Administrator), any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of such termination, may thereafter be exercised by the Optionee for a period of 12
months from the date the Optionee’s Service Relationship is terminated by reason of disability or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of the termination of the
Optionee’s Service Relationship by reason of disability shall terminate immediately and be of no further force or effect. 
 (c)
Termination for Cause. If the Optionee’s Service Relationship with the Company or a Subsidiary terminates for Cause, any portion of this Stock Option outstanding on such date shall terminate immediately and be of no further force and
effect. For purposes hereof, “Cause” shall mean, unless otherwise provided in a consulting or other service agreement between the Company and the Optionee, a determination by the Administrator that the Optionee shall be dismissed as a
result of (i) any material breach by the Optionee of any agreement between the Optionee and the Company; (ii) the conviction of, indictment for or plea of nolo contendere by the Optionee to a felony or a crime involving moral turpitude; or
(iii) any material misconduct or willful and deliberate non-performance (other than by reason of disability) by the Optionee of the Optionee’s duties to the Company. 

(d) Other Termination. If the Optionee’s Service Relationship with the Company or a Subsidiary terminates for any reason other
than the Optionee’s death, the Optionee’s disability or Cause, and unless otherwise determined by the Administrator, any portion of this Stock Option outstanding on such date may be exercised, to the extent exercisable on the date of
termination, for a period of three months from the date of termination or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of termination shall terminate immediately and be of no further
force or effect. 
 The Administrator’s determination of the reason for termination of the Optionee’s Service Relationship with
the Company or a Subsidiary shall be conclusive and binding on the Optionee and his or her representatives or legatees. 

  
 3 

 4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock
Option shall be subject to and governed by all the terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the
Plan, unless a different meaning is specified herein. 
 5. Transferability. This Agreement is personal to the Optionee, is non-assignable and is not transferable in any manner, by operation of law or otherwise, other than by will or the laws of descent and distribution. This Stock Option is exercisable, during the Optionee’s
lifetime, only by the Optionee, and thereafter, only by the Optionee’s legal representative or legatee. 
 6. No Obligation to
Continue Service Relationship. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or this Agreement to continue the Optionee’s Service Relationship with the Company or a Subsidiary and neither the Plan nor
this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate the Optionee’s Service Relationship with the Company or a Subsidiary at any time. 

7. Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes
all prior agreements and discussions between the parties concerning such subject matter. 
 8. Data Privacy Consent. In order to
administer the Plan and this Agreement and to implement or structure future equity grants, the Company, its subsidiaries and affiliates and certain agents thereof (together, the “Relevant Companies”) may process any and all personal or
professional data, including but not limited to Social Security or other identification number, home address and telephone number, date of birth and other information that is necessary or desirable for the administration of the Plan and/or this
Agreement (the “Relevant Information”). By entering into this Agreement, the Optionee (i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant Information; (ii) waives any
privacy rights the Optionee may have with respect to the Relevant Information; (iii) authorizes the Relevant Companies to store and transmit such information in electronic form; and (iv) authorizes the transfer of the Relevant Information
to any jurisdiction in which the Relevant Companies consider appropriate. The Optionee shall have access to, and the right to change, the Relevant Information. Relevant Information will only be used in accordance with applicable law. 

  
 4 

 9. Notices. Notices hereunder shall be mailed or delivered to the Company at its
principal place of business and shall be mailed or delivered to the Optionee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

 

			
	Graphite Bio, Inc.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Optionee (including through an online acceptance process) is acceptable. 
  

					
	Dated:                     	 	                        	  	  

		 		  	Optionee’s Signature
			
		 		  	 Optionee’s name and address:

			
		 		  	  

			
		 		  	  

			
		 		  	  

  
 5 

 NON-QUALIFIED STOCK OPTION AGREEMENT 

FOR NON-EMPLOYEE DIRECTORS 

UNDER THE GRAPHITE BIO, INC. 

2021 STOCK OPTION AND INCENTIVE PLAN 
  

			
	Name of Optionee:	  	                                      
                                         
     
		
	No. of Option Shares:	  	                                    

		
	Option Exercise Price per Share:	  	$                                  
		  	[FMV on Grant Date]
		
	Grant Date:	  	                                    

		
	Expiration Date:	  	                                    

		  	[No more than 10 years]

 Pursuant to the Graphite Bio, Inc. 2021 Stock Option and Incentive Plan as amended through the date hereof
(the “Plan”), Graphite Bio, Inc. (the “Company”) hereby grants to the Optionee named above, who is a Non-Employee Director of the Company but is not an employee of the Company, an option
(the “Stock Option”) to purchase on or prior to the Expiration Date specified above all or part of the number of shares of Common Stock, par value $0.00001 per share (the “Stock”), of the Company specified above at the Option
Exercise Price per Share specified above subject to the terms and conditions set forth herein and in the Plan. This Stock Option is not intended to be an “incentive stock option” under Section 422 of the Internal Revenue Code of 1986,
as amended. 
 1. Exercisability Schedule. No portion of this Stock Option may be exercised until such portion shall have become
exercisable. Except as set forth below, and subject to the discretion of the Administrator (as defined in Section 2 of the Plan) to accelerate the exercisability schedule hereunder, this Stock Option shall be exercisable as follows:
________________________________________, so long as the Optionee remains in service as a member of the Board on such dates. 

Notwithstanding the foregoing, in the event of a Sale Event, 100% of the then-outstanding and unvested Option Shares shall immediately be
deemed vested and exercisable on the date of such Sale Event; provided, that the Optionee remains in service as a member of the Board until the date of such Sale Event. Once exercisable, this Stock Option shall continue to be exercisable at any time
or times prior to the close of business on the Expiration Date, subject to the provisions hereof and of the Plan. 
 2. Manner of
Exercise. 
 (a) The Optionee may exercise this Stock Option only in the following manner: from time to time on or prior to the
Expiration Date of this Stock Option, the Optionee may give written notice to the Administrator of his or her election to purchase some or all of the Option Shares purchasable at the time of such notice. This notice shall specify the number of
Option Shares to be purchased. 

 Payment of the purchase price for the Option Shares may be made by one or more of the
following methods: (i) in cash, by certified or bank check or other instrument acceptable to the Administrator; (ii) through the delivery (or attestation to the ownership) of shares of Stock that have been purchased by the Optionee on the
open market or that are beneficially owned by the Optionee and are not then subject to any restrictions under any Company plan and that otherwise satisfy any holding periods as may be required by the Administrator; (iii) by the Optionee
delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable to the Company to pay the option purchase price, provided that
in the event the Optionee chooses to pay the option purchase price as so provided, the Optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Administrator shall prescribe as
a condition of such payment procedure; (iv) by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value
that does not exceed the aggregate exercise price; or (v) a combination of (i), (ii), (iii) and (iv) above. Payment instruments will be received subject to collection. 

The transfer to the Optionee on the records of the Company or of the transfer agent of the Option Shares will be contingent upon (i) the
Company’s receipt from the Optionee of the full purchase price for the Option Shares, as set forth above, (ii) the fulfillment of any other requirements contained herein or in the Plan or in any other agreement or provision of laws, and
(iii) the receipt by the Company of any agreement, statement or other evidence that the Company may require to satisfy itself that the issuance of Stock to be purchased pursuant to the exercise of Stock Options under the Plan and any subsequent
resale of the shares of Stock will be in compliance with applicable laws and regulations. In the event the Optionee chooses to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock
transferred to the Optionee upon the exercise of the Stock Option shall be net of the Shares attested to. 
 (b) The shares of Stock
purchased upon exercise of this Stock Option shall be transferred to the Optionee on the records of the Company or of the transfer agent upon compliance to the satisfaction of the Administrator with all requirements under applicable laws or
regulations in connection with such transfer and with the requirements hereof and of the Plan. The determination of the Administrator as to such compliance shall be final and binding on the Optionee. The Optionee shall not be deemed to be the holder
of, or to have any of the rights of a holder with respect to, any shares of Stock subject to this Stock Option unless and until this Stock Option shall have been exercised pursuant to the terms hereof, the Company or the transfer agent shall have
transferred the shares to the Optionee, and the Optionee’s name shall have been entered as the stockholder of record on the books of the Company. Thereupon, the Optionee shall have full voting, dividend and other ownership rights with respect
to such shares of Stock. 
 (c) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be
exercisable after the Expiration Date hereof. 

  
 2 

 3. Termination as Non-Employee Director. If
the Optionee ceases to be a Non-Employee Director of the Company, the period within which to exercise the Stock Option may be subject to earlier termination as set forth below. 

(a) Termination Due to Death. If the Optionee’s service as a Non-Employee Director
terminates by reason of the Optionee’s death, any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of death, may thereafter be exercised by the Optionee’s legal representative or legatee for a
period of 12 months from the date of death or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of death shall terminate immediately and be of no further force or effect. 

(b) Other Termination. If the Optionee ceases to be a Non-Employee Director for any reason
other than the Optionee’s death, any portion of this Stock Option outstanding on such date may be exercised, to the extent exercisable on the date the Optionee ceased to be a Non-Employee Director, for a
period of six months from the date the Optionee ceased be a Non-Employee Director or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date the Optionee
ceases to be a Non-Employee Director shall terminate immediately and be of no further force or effect. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by all
the terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified
herein. 
 5. Transferability. This Agreement is personal to the Optionee, is non-assignable
and is not transferable in any manner, by operation of law or otherwise, other than by will or the laws of descent and distribution. This Stock Option is exercisable, during the Optionee’s lifetime, only by the Optionee, and thereafter, only by
the Optionee’s legal representative or legatee. 
 6. No Obligation to Continue as a
Non-Employee Director. Neither the Plan nor this Stock Option confers upon the Optionee any rights with respect to continuance as a Non-Employee Director. 

7. Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes
all prior agreements and discussions between the parties concerning such subject matter. 
 8. Data Privacy Consent. In order to
administer the Plan and this Agreement and to implement or structure future equity grants, the Company, its subsidiaries and affiliates and certain agents thereof (together, the “Relevant Companies”) may process any and all personal or
professional data, including but not limited to Social Security or other identification number, home address and telephone number, date of birth and other information that is necessary or desirable for the administration of the Plan and/or this
Agreement (the “Relevant Information”). By entering into this Agreement, the Optionee (i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant Information; (ii) waives any
privacy 

  
 3 

 
rights the Optionee may have with respect to the Relevant Information; (iii) authorizes the Relevant Companies to store and transmit such information in electronic form; and
(iv) authorizes the transfer of the Relevant Information to any jurisdiction in which the Relevant Companies consider appropriate. The Optionee shall have access to, and the right to change, the Relevant Information. Relevant Information will
only be used in accordance with applicable law. 
 9. Notices. Notices hereunder shall be mailed or delivered to the Company at its
principal place of business and shall be mailed or delivered to the Optionee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

 

			
	Graphite Bio, Inc.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Optionee (including through an online acceptance process) is acceptable. 
  

					
	Dated:                     	 	                        	  	  

		 		  	 Optionee’s Signature

			
		 		  	 Optionee’s name and address:

			
		 		  	  

			
		 		  	  

			
		 		  	  

  
 4 

 NON-QUALIFIED STOCK OPTION AGREEMENT 

FOR COMPANY EMPLOYEES 

UNDER THE GRAPHITE BIO, INC. 

2021 STOCK OPTION AND INCENTIVE PLAN 
  

			
	Name of Optionee:	  	                                      
                                      
		
	No. of Option Shares:	  	                                    

		
	Option Exercise Price per Share:	  	$                                  
		
		  	[FMV on Grant Date]
		
	Grant Date:	  	                                    

		
	Expiration Date:	  	                                    

 Pursuant to the Graphite Bio, Inc. 2021 Stock Option and Incentive Plan as amended through the date hereof
(the “Plan”), Graphite Bio, Inc. (the “Company”) hereby grants to the Optionee named above an option (the “Stock Option”) to purchase on or prior to the Expiration Date specified above all or part of the number of
shares of Common Stock, par value $0.00001 per share (the “Stock”) of the Company specified above at the Option Exercise Price per Share specified above subject to the terms and conditions set forth herein and in the Plan. This Stock
Option is not intended to be an “incentive stock option” under Section 422 of the Internal Revenue Code of 1986, as amended. 

1. Exercisability Schedule. No portion of this Stock Option may be exercised until such portion shall have become exercisable. Except as
set forth below, and subject to the discretion of the Administrator (as defined in Section 2 of the Plan) to accelerate the exercisability schedule hereunder, this Stock Option shall be exercisable as follows: __________________________, so
long as Optionee continues to have a Service Relationship with the Company or a Subsidiary on such dates. 
 Once exercisable, this Stock
Option shall continue to be exercisable at any time or times prior to the close of business on the Expiration Date, subject to the provisions hereof and of the Plan. 

2. Manner of Exercise. 

(a) The Optionee may exercise this Stock Option only in the following manner: from time to time on or prior to the Expiration Date of this
Stock Option, the Optionee may give written notice to the Administrator of his or her election to purchase some or all of the Option Shares purchasable at the time of such notice. This notice shall specify the number of Option Shares to be
purchased. 
  

 Payment of the purchase price for the Option Shares may be made by one or more of the
following methods: (i) in cash, by certified or bank check or other instrument acceptable to the Administrator; (ii) through the delivery (or attestation to the ownership) of shares of Stock that have been purchased by the Optionee on the
open market or that are beneficially owned by the Optionee and are not then subject to any restrictions under any Company plan and that otherwise satisfy any holding periods as may be required by the Administrator; (iii) by the Optionee
delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable to the Company to pay the option purchase price, provided that
in the event the Optionee chooses to pay the option purchase price as so provided, the Optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Administrator shall prescribe as
a condition of such payment procedure; (iv) by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value
that does not exceed the aggregate exercise price; or (v) a combination of (i), (ii), (iii) and (iv) above. Payment instruments will be received subject to collection. 

The transfer to the Optionee on the records of the Company or of the transfer agent of the Option Shares will be contingent upon (i) the
Company’s receipt from the Optionee of the full purchase price for the Option Shares, as set forth above, (ii) the fulfillment of any other requirements contained herein or in the Plan or in any other agreement or provision of laws, and
(iii) the receipt by the Company of any agreement, statement or other evidence that the Company may require to satisfy itself that the issuance of Stock to be purchased pursuant to the exercise of Stock Options under the Plan and any subsequent
resale of the shares of Stock will be in compliance with applicable laws and regulations. In the event the Optionee chooses to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock
transferred to the Optionee upon the exercise of the Stock Option shall be net of the Shares attested to. 
 (b) The shares of Stock
purchased upon exercise of this Stock Option shall be transferred to the Optionee on the records of the Company or of the transfer agent upon compliance to the satisfaction of the Administrator with all requirements under applicable laws or
regulations in connection with such transfer and with the requirements hereof and of the Plan. The determination of the Administrator as to such compliance shall be final and binding on the Optionee. The Optionee shall not be deemed to be the holder
of, or to have any of the rights of a holder with respect to, any shares of Stock subject to this Stock Option unless and until this Stock Option shall have been exercised pursuant to the terms hereof, the Company or the transfer agent shall have
transferred the shares to the Optionee, and the Optionee’s name shall have been entered as the stockholder of record on the books of the Company. Thereupon, the Optionee shall have full voting, dividend and other ownership rights with respect
to such shares of Stock. 
 (c) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be
exercisable after the Expiration Date hereof. 
 3. Termination of Service Relationship. If the Optionee’s Service Relationship
with the Company or a Subsidiary (as defined in the Plan) is terminated, the period within which to exercise the Stock Option may be subject to earlier termination as set forth below. 

  
 2 

 (a) Termination Due to Death. If the Optionee’s Service Relationship with the
Company or a Subsidiary terminates by reason of the Optionee’s death, any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of death, may thereafter be exercised by the Optionee’s legal
representative or legatee for a period of 12 months from the date of death or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the date of death shall terminate immediately and be of no further force
or effect. 
 (b) Termination Due to Disability. If the Optionee’s Service Relationship with the Company or a Subsidiary
terminates by reason of the Optionee’s disability (as determined by the Administrator), any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of such termination, may thereafter be exercised by the
Optionee for a period of 12 months from the date the Optionee’s Service Relationship is terminated by reason of the Optionee’s disability or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on
the date of the termination of the Optionee’s Service Relationship by reason of disability shall terminate immediately and be of no further force or effect. 

(c) Termination for Cause. If the Optionee’s Service Relationship with the Company or a Subsidiary terminates for Cause, any
portion of this Stock Option outstanding on such date shall terminate immediately and be of no further force and effect. For purposes hereof, “Cause” shall mean, unless otherwise provided in an employment or other service agreement between
the Company and the Optionee, a determination by the Administrator that the Optionee shall be dismissed as a result of (i) any material breach by the Optionee of any agreement between the Optionee and the Company; (ii) the conviction of,
indictment for or plea of nolo contendere by the Optionee to a felony or a crime involving moral turpitude; or (iii) any material misconduct or willful and deliberate non-performance (other than by reason
of disability) by the Optionee of the Optionee’s duties to the Company. 
 (d) Other Termination. If the Optionee’s Service
Relationship with the Company or a Subsidiary terminates for any reason other than the Optionee’s death, the Optionee’s disability or Cause, and unless otherwise determined by the Administrator, any portion of this Stock Option outstanding
on such date may be exercised, to the extent exercisable on the date of termination, for a period of three months from the date of termination or until the Expiration Date, if earlier. Any portion of this Stock Option that is not exercisable on the
date of termination shall terminate immediately and be of no further force or effect. 
 The Administrator’s determination of the
reason for termination of the Optionee’s Service Relationship with the Company or a Subsidiary shall be conclusive and binding on the Optionee and his or her representatives or legatees. 

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by all the
terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein.

  
 3 

 5. Transferability. This Agreement is personal to the Optionee, is non-assignable and is not transferable in any manner, by operation of law or otherwise, other than by will or the laws of descent and distribution. This Stock Option is exercisable, during the Optionee’s
lifetime, only by the Optionee, and thereafter, only by the Optionee’s legal representative or legatee. 
 6. Tax Withholding.
The Optionee shall, not later than the date as of which the exercise of this Stock Option becomes a taxable event for Federal income tax purposes, pay to the Company or make arrangements satisfactory to the Administrator for payment of any Federal,
state, and local taxes required by law to be withheld on account of such taxable event. The Company shall have the authority to cause the required tax withholding obligation to be satisfied, in whole or in part, by (i) withholding from shares
of Stock to be issued to the Optionee a number of shares of Stock with an aggregate Fair Market Value that would satisfy the withholding amount due; or (ii) causing its transfer agent to sell from the number of shares of Stock to be issued to
the Optionee, the number of shares of Stock necessary to satisfy the Federal, state and local taxes required by law to be withheld from the Optionee on account of such transfer. 

7. No Obligation to Continue Service Relationship. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or
this Agreement to continue the Optionee in a Service Relationship with the Company or a Subsidiary and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate the Optionee’s
Service Relationship with the Company or a Subsidiary at any time. 
 8. Integration. This Agreement constitutes the entire agreement
between the parties with respect to this Stock Option and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

9. Data Privacy Consent. In order to administer the Plan and this Agreement and to implement or structure future equity grants, the
Company, its subsidiaries and affiliates and certain agents thereof (together, the “Relevant Companies”) may process any and all personal or professional data, including but not limited to Social Security or other identification number,
home address and telephone number, date of birth and other information that is necessary or desirable for the administration of the Plan and/or this Agreement (the “Relevant Information”). By entering into this Agreement, the Optionee
(i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant Information; (ii) waives any privacy rights the Optionee may have with respect to the Relevant Information; (iii) authorizes
the Relevant Companies to store and transmit such information in electronic form; and (iv) authorizes the transfer of the Relevant Information to any jurisdiction in which the Relevant Companies consider appropriate. The Optionee shall have
access to, and the right to change, the Relevant Information. Relevant Information will only be used in accordance with applicable law. 

10. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Optionee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

  
 4 

 
			
	Graphite Bio, Inc.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Optionee (including through an online acceptance process) is acceptable. 
  

									
	Dated:	 	  
	 	        	 	  

				
		 		 		 	Optionee’s Signature
				
		 		 		 	Optionee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 5 

 RESTRICTED STOCK AWARD AGREEMENT 

UNDER THE GRAPHITE BIO, INC. 

2021 STOCK OPTION AND INCENTIVE PLAN 
  

			
	Name of Grantee:	 	                                      
                                         
         
		
	No. of Shares:	 	                                
		
	Grant Date:	 	                                

 Pursuant to the Graphite Bio, Inc. 2021 Stock Option and Incentive Plan as amended through the date hereof
(the “Plan”), Graphite Bio, Inc. (the “Company”) hereby grants a Restricted Stock Award (an “Award”) to the Grantee named above. Upon acceptance of this Award, the Grantee shall receive the number of shares of Common
Stock, par value $0.00001 per share (the “Stock”) of the Company specified above, subject to the restrictions and conditions set forth herein and in the Plan. The Company acknowledges the receipt from the Grantee of consideration with
respect to the par value of the Stock in the form of cash, past or future services rendered to the Company by the Grantee or such other form of consideration as is acceptable to the Administrator. 

1. Award. The shares of Restricted Stock awarded hereunder shall be issued and held by the Company’s transfer agent in book entry
form, and the Grantee’s name shall be entered as the stockholder of record on the books of the Company. Thereupon, the Grantee shall have all the rights of a stockholder with respect to such shares, including voting and dividend rights,
subject, however, to the restrictions and conditions specified in Paragraph 2 below. The Grantee shall (i) sign and deliver to the Company a copy of this Award Agreement and (ii) deliver to the Company a stock power endorsed in blank.

 2. Restrictions and Conditions. 

(a) Any book entries for the shares of Restricted Stock granted herein shall bear an appropriate legend, as determined by the Administrator in
its sole discretion, to the effect that such shares are subject to restrictions as set forth herein and in the Plan. 
 (b) Shares of
Restricted Stock granted herein may not be sold, assigned, transferred, pledged or otherwise encumbered or disposed of by the Grantee prior to vesting. 

(c) If the Grantee’s Service Relationship with the Company or a Subsidiary is voluntarily or involuntarily terminated for any reason
(including due to death or disability) prior to vesting of shares of Restricted Stock granted herein, all shares of Restricted Stock shall immediately and automatically be forfeited and returned to the Company. 

3. Vesting of Restricted Stock. The restrictions and conditions in Paragraph 2 of this Agreement shall lapse as follows:
____________________________ (each such date, a “Vesting Date”), so long as the Grantee continues to have a Service Relationship with the Company or a Subsidiary on such Dates. If a series of Vesting Dates is specified, then the
restrictions and conditions in Paragraph 2 shall lapse only with respect to the number of shares of Restricted Stock specified as vested on such date. 

 Subsequent to such Vesting Date or Dates, the shares of Stock on which all restrictions and
conditions have lapsed shall no longer be deemed Restricted Stock. The Administrator may at any time accelerate the vesting schedule specified in this Paragraph 3. 

4. Dividends. Dividends on shares of Restricted Stock shall be paid currently to the Grantee. 

5. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Award shall be subject to and governed by all the terms
and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein. 

6. Transferability. This Agreement is personal to the Grantee, is non-assignable and is not
transferable in any manner, by operation of law or otherwise, other than by will or the laws of descent and distribution. 
 7. Tax
Withholding. The Grantee shall, not later than the date as of which the receipt of this Award becomes a taxable event for Federal income tax purposes, pay to the Company or make arrangements satisfactory to the Administrator for payment of any
Federal, state, and local taxes required by law to be withheld on account of such taxable event. Except in the case where an election is made pursuant to Paragraph 8 below, the Company shall have the authority to cause the required tax withholding
obligation to be satisfied, in whole or in part, by (i) withholding from shares of Stock to be issued or released by the transfer agent a number of shares of Stock with an aggregate Fair Market Value that would satisfy the withholding amount
due; or (ii) causing its transfer agent to sell from the number of shares of Stock to be issued or released to the Grantee, the number of shares of Stock necessary to satisfy the Federal, state and local taxes required by law to be withheld
from the Grantee on account of such transfer. 
 8. Election Under Section 83(b). The Grantee and the Company
hereby agree that the Grantee may, within 30 days following the Grant Date of this Award, file with the Internal Revenue Service and the Company an election under Section 83(b) of the Internal Revenue Code. In the event the Grantee makes such
an election, he or she agrees to provide a copy of the election to the Company. The Grantee acknowledges that he or she is responsible for obtaining the advice of his or her tax advisors with regard to the Section 83(b) election and that he or
she is relying solely on such advisors and not on any statements or representations of the Company or any of its agents with regard to such election. 

9. No Obligation to Continue Service Relationship. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or
this Agreement to continue the Grantee in a Service Relationship with the Company or a Subsidiary and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate the Grantee’s
Service Relationship with the Company or a Subsidiary at any time. 

  
 2 

 10. Integration. This Agreement constitutes the entire agreement between the parties
with respect to this Award and supersedes all prior agreements and discussions between the parties concerning such subject matter. 
 11.
Data Privacy Consent. In order to administer the Plan and this Agreement and to implement or structure future equity grants, the Company, its subsidiaries and affiliates and certain agents thereof (together, the “Relevant
Companies”) may process any and all personal or professional data, including but not limited to Social Security or other identification number, home address and telephone number, date of birth and other information that is necessary or
desirable for the administration of the Plan and/or this Agreement (the “Relevant Information”). By entering into this Agreement, the Grantee (i) authorizes the Company to collect, process, register and transfer to the Relevant
Companies all Relevant Information; (ii) waives any privacy rights the Grantee may have with respect to the Relevant Information; (iii) authorizes the Relevant Companies to store and transmit such information in electronic form; and
(iv) authorizes the transfer of the Relevant Information to any jurisdiction in which the Relevant Companies consider appropriate. The Grantee shall have access to, and the right to change, the Relevant Information. Relevant Information will
only be used in accordance with applicable law. 
 12. Notices. Notices hereunder shall be mailed or delivered to the Company at its
principal place of business and shall be mailed or delivered to the Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

  
 3 

 
			
	Graphite Bio, Inc.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Grantee (including through an online acceptance process) is acceptable. 
  

									
	Dated:	 	  
	 	        	 	  

				
		 		 		 	Grantee’s Signature
				
		 		 		 	Grantee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 4 

 RESTRICTED STOCK UNIT AWARD AGREEMENT 

FOR CONSULTANTS 
 UNDER
THE GRAPHITE BIO, INC. 
 2021 STOCK OPTION AND INCENTIVE PLAN 

 

			
	Name of Grantee:	  	                                      
                                      
		
	No. of Restricted Stock Units:	  	                                
		
	Grant Date:	  	                                
		
	Vesting Commencement Date:	  	                                

 Pursuant to the Graphite Bio, Inc. 2021 Stock Option and Incentive Plan as amended through the date hereof
(the “Plan”), Graphite Bio, Inc. (the “Company”) hereby grants an award of the number of Restricted Stock Units listed above (an “Award”) to the Grantee named above. Each Restricted Stock Unit shall relate to one share
of Class A Common Stock, par value $0.00001 per share (the “Stock”) of the Company. 
 1. Restrictions on Transfer of
Award. This Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the Grantee, and any shares of Stock issuable with respect to the Award may not be sold, transferred, pledged, assigned or otherwise
encumbered or disposed of until (i) the Restricted Stock Units have vested as provided in Paragraph 2 of this Agreement and (ii) shares of Stock have been issued to the Grantee in accordance with the terms of the Plan and this Agreement.

 2. Vesting of Restricted Stock Units. The restrictions and conditions of Paragraph 1 of this Agreement shall lapse as follows:
_________________________________ (each such date, a “Vesting Date”), so long as the Grantee continues to have a Service Relationship with the Company or a Subsidiary on such Vesting Dates. If a series of Vesting Dates is specified, then
the restrictions and conditions in Paragraph 1 shall lapse only with respect to the number of Restricted Stock Units specified as vested on such date. 

The Administrator may at any time accelerate the vesting schedule specified in this Paragraph 2. 

3. Termination of Service Relationship. If the Grantee’s Service Relationship with the Company or a Subsidiary terminates for any
reason (including death or disability) prior to the satisfaction of the vesting conditions set forth in Paragraph 2 above, any Restricted Stock Units that have not vested as of such date shall automatically and without notice terminate and be
forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or interests in such unvested Restricted Stock Units. 

 4. Issuance of Shares of Stock. As soon as practicable following each Vesting Date
(but in no event later than two and one-half months after the end of the year in which the Vesting Date occurs), the Company shall issue to the Grantee the number of shares of Stock equal to the aggregate
number of Restricted Stock Units that have vested pursuant to Paragraph 2 of this Agreement on such date and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such shares. 

5. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Agreement shall be subject to and governed by all the
terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein.

 6. Section 409A of the Code. This Agreement shall be interpreted in such a manner that all provisions relating
to the settlement of the Award are exempt from the requirements of Section 409A of the Code as “short-term deferrals” as described in Section 409A of the Code. 

7. No Obligation to Continue Service Relationship. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or
this Agreement to continue the Grantee in a Service Relationship with the Company or a Subsidiary and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate the Service
Relationship of the Grantee at any time. 
 8. Integration. This Agreement constitutes the entire agreement between the parties with
respect to this Award and supersedes all prior agreements and discussions between the parties concerning such subject matter. 
 9. Data
Privacy Consent. In order to administer the Plan and this Agreement and to implement or structure future equity grants, the Company, its subsidiaries and affiliates and certain agents thereof (together, the “Relevant Companies”) may
process any and all personal or professional data, including but not limited to Social Security or other identification number, home address and telephone number, date of birth and other information that is necessary or desirable for the
administration of the Plan and/or this Agreement (the “Relevant Information”). By entering into this Agreement, the Grantee (i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant
Information; (ii) waives any privacy rights the Grantee may have with respect to the Relevant Information; (iii) authorizes the Relevant Companies to store and transmit such information in electronic form; and (iv) authorizes the
transfer of the Relevant Information to any jurisdiction in which the Relevant Companies consider appropriate. The Grantee shall have access to, and the right to change, the Relevant Information. Relevant Information will only be used in accordance
with applicable law. 
 10. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business
and shall be mailed or delivered to the Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

  
 2 

 
			
	Graphite Bio, Inc.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Grantee (including through an online acceptance process) is acceptable. 
  

									
	Dated:	 	  
	 	        	 	  

				
		 		 		 	Grantee’s Signature
				
		 		 		 	Grantee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 3 

 RESTRICTED STOCK UNIT AWARD AGREEMENT 

FOR NON-EMPLOYEE DIRECTORS 

UNDER THE GRAPHITE BIO, INC. 

2021 STOCK OPTION AND INCENTIVE PLAN 
  

			
	Name of Grantee:	 	                                      
                                         
 
		
	No. of Restricted Stock Units:	 	                                
		
	Grant Date:	 	                                

 Pursuant to the Graphite Bio, Inc. 2021 Stock Option and Incentive Plan as amended through the date hereof
(the “Plan”), Graphite Bio, Inc. (the “Company”) hereby grants an award of the number of Restricted Stock Units listed above (an “Award”) to the Grantee named above. Each Restricted Stock Unit shall relate to one share
of Common Stock, par value $0.00001 per share (the “Stock”) of the Company. 
 1. Restrictions on Transfer of Award. This
Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the Grantee, and any shares of Stock issuable with respect to the Award may not be sold, transferred, pledged, assigned or otherwise encumbered or
disposed of until (i) the Restricted Stock Units have vested as provided in Paragraph 2 of this Agreement and (ii) shares of Stock have been issued to the Grantee in accordance with the terms of the Plan and this Agreement. 

2. Vesting of Restricted Stock Units. The restrictions and conditions of Paragraph 1 of this Agreement shall lapse as follows:
__________________________________ (each such date, a “Vesting Date”), so long as the Grantee remains in service as a member of the Board on such Vesting Dates. If a series of Vesting Dates is specified, then the restrictions and
conditions in Paragraph 1 shall lapse only with respect to the number of Restricted Stock Units specified as vested on such date. 

Notwithstanding the foregoing, in the event of a Sale Event, 100% of the then-outstanding and unvested Restricted Stock Units shall
immediately be deemed vested on the date of such Sale Event; provided, that the Grantee remains in service as a member of the Board until the date of such Sale Event. The Administrator may at any time accelerate the vesting schedule specified in
this Paragraph 2. 
 3. Termination of Service as a Non-Employee Director. If the
Grantee’s service as a Non-Employee Director terminates for any reason (including death or disability) prior to the satisfaction of the vesting conditions set forth in Paragraph 2 above, any Restricted
Stock Units that have not vested as of such date shall automatically and without notice terminate and be forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any
further rights or interests in such unvested Restricted Stock Units. 
  

 4. Issuance of Shares of Stock. As soon as practicable following each Vesting Date
(but in no event later than two and one-half months after the end of the year in which the Vesting Date occurs), the Company shall issue to the Grantee the number of shares of Stock equal to the aggregate
number of Restricted Stock Units that have vested pursuant to Paragraph 2 of this Agreement on such date and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such shares. 

5. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Agreement shall be subject to and governed by all the
terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein.

 6. Section 409A of the Code. This Agreement shall be interpreted in such a manner that all provisions relating
to the settlement of the Award are exempt from the requirements of Section 409A of the Code as “short-term deferrals” as described in Section 409A of the Code. 

7. No Obligation to Continue as a Non-Employee Director. Neither the Plan nor this Award confers
upon the Grantee any rights with respect to continuance as a Non-Employee Director. 
 8.
Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all prior agreements and discussions between the parties concerning such subject matter. 

9. Data Privacy Consent. In order to administer the Plan and this Agreement and to implement or structure future equity grants, the
Company, its subsidiaries and affiliates and certain agents thereof (together, the “Relevant Companies”) may process any and all personal or professional data, including but not limited to Social Security or other identification number,
home address and telephone number, date of birth and other information that is necessary or desirable for the administration of the Plan and/or this Agreement (the “Relevant Information”). By entering into this Agreement, the Grantee
(i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant Information; (ii) waives any privacy rights the Grantee may have with respect to the Relevant Information; (iii) authorizes
the Relevant Companies to store and transmit such information in electronic form; and (iv) authorizes the transfer of the Relevant Information to any jurisdiction in which the Relevant Companies consider appropriate. The Grantee shall have
access to, and the right to change, the Relevant Information. Relevant Information will only be used in accordance with applicable law. 

10. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or
delivered to the Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

  
 2 

 
			
	Graphite Bio, Inc.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Grantee (including through an online acceptance process) is acceptable. 
  

									
	Dated:	 	  
	 	        	 	  

				
		 		 		 	Grantee’s Signature
				
		 		 		 	Grantee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 3 

 RESTRICTED STOCK UNIT AWARD AGREEMENT 

FOR COMPANY EMPLOYEES 

UNDER THE GRAPHITE BIO, INC. 

2021 STOCK OPTION AND INCENTIVE PLAN 
  

			
	Name of Grantee:	 	                                      
                                      
		
	No. of Restricted Stock Units:	 	                                
		
	Grant Date:	 	                                

 Pursuant to the Graphite Bio, Inc. 2021 Stock Option and Incentive Plan as amended through the date hereof
(the “Plan”), Graphite Bio, Inc. (the “Company”) hereby grants an award of the number of Restricted Stock Units listed above (an “Award”) to the Grantee named above. Each Restricted Stock Unit shall relate to one share
of Common Stock, par value $0.00001 per share (the “Stock”) of the Company. 
 1. Restrictions on Transfer of Award. This
Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the Grantee, and any shares of Stock issuable with respect to the Award may not be sold, transferred, pledged, assigned or otherwise encumbered or
disposed of until (i) the Restricted Stock Units have vested as provided in Paragraph 2 of this Agreement and (ii) shares of Stock have been issued to the Grantee in accordance with the terms of the Plan and this Agreement. 

2. Vesting of Restricted Stock Units. The restrictions and conditions of Paragraph 1 of this Agreement shall lapse as follows:
_______________________________ (each such date, a “Vesting Date”), so long as the Grantee continues to have a Service Relationship with the Company or a Subsidiary on such Vesting Dates. If a series of Vesting Dates is specified, then the
restrictions and conditions in Paragraph 1 shall lapse only with respect to the number of Restricted Stock Units specified as vested on such date. 

The Administrator may at any time accelerate the vesting schedule specified in this Paragraph 2. 

3. Termination of Service Relationship. If the Grantee’s Service Relationship with the Company or a Subsidiary terminates for any
reason (including death or disability) prior to the satisfaction of the vesting conditions set forth in Paragraph 2 above, any Restricted Stock Units that have not vested as of such date shall automatically and without notice terminate and be
forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or interests in such unvested Restricted Stock Units. 

4. Issuance of Shares of Stock. As soon as practicable following each Vesting Date (but in no event later than two and one-half months after the end of the year in which the Vesting Date occurs), the Company shall issue to the Grantee the number of shares of Stock equal to the aggregate number of Restricted Stock Units that have
vested pursuant to Paragraph 2 of this Agreement on such date and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such shares. 

 5. Incorporation of Plan. Notwithstanding anything herein to the contrary, this
Agreement shall be subject to and governed by all the terms and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the
Plan, unless a different meaning is specified herein. 
 6. Tax Withholding. The Grantee shall, not later than the date as of which
the receipt of this Award becomes a taxable event for Federal income tax purposes, pay to the Company or make arrangements satisfactory to the Administrator for payment of any Federal, state, and local taxes required by law to be withheld on account
of such taxable event. The Company shall have the authority to cause the required tax withholding obligation to be satisfied, in whole or in part, by (i) withholding from shares of Stock to be issued to the Grantee a number of shares of Stock
with an aggregate Fair Market Value that would satisfy the withholding amount due; or (ii) causing its transfer agent to sell from the number of shares of Stock to be issued to the Grantee, the number of shares of Stock necessary to satisfy the
Federal, state and local taxes required by law to be withheld from the Grantee on account of such transfer. 
 7.
Section 409A of the Code. This Agreement shall be interpreted in such a manner that all provisions relating to the settlement of the Award are exempt from the requirements of Section 409A of the Code as
“short-term deferrals” as described in Section 409A of the Code. 
 8. No Obligation to Continue Service Relationship.
Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or this Agreement to continue the Grantee’s Service Relationship with the Company or a Subsidiary and neither the Plan nor this Agreement shall interfere in any
way with the right of the Company or any Subsidiary to terminate the Grantee’s Service Relationship with the Company or a Subsidiary at any time. 

9. Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all prior
agreements and discussions between the parties concerning such subject matter. 
 10. Data Privacy Consent. In order to administer the
Plan and this Agreement and to implement or structure future equity grants, the Company, its subsidiaries and affiliates and certain agents thereof (together, the “Relevant Companies”) may process any and all personal or professional data,
including but not limited to Social Security or other identification number, home address and telephone number, date of birth and other information that is necessary or desirable for the administration of the Plan and/or this Agreement (the
“Relevant Information”). By entering into this Agreement, the Grantee (i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant Information; (ii) waives any privacy rights the
Grantee may have with respect to the Relevant Information; (iii) authorizes the Relevant Companies to store and transmit such information in electronic form; and (iv) authorizes the transfer of the Relevant Information to any jurisdiction
in which the Relevant Companies consider appropriate. The Grantee shall have access to, and the right to change, the Relevant Information. Relevant Information will only be used in accordance with applicable law. 

  
 2 

 11. Notices. Notices hereunder shall be mailed or delivered to the Company at its
principal place of business and shall be mailed or delivered to the Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 

 

			
	Graphite Bio, Inc.
		
	By:	 	  

		 	Title:

 The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned.
Electronic acceptance of this Agreement pursuant to the Company’s instructions to the Grantee (including through an online acceptance process) is acceptable. 
  

									
	Dated:	 	  
	 	        	 	  

				
		 		 		 	Grantee’s Signature
				
		 		 		 	Grantee’s name and address:
				
		 		 		 	  

				
		 		 		 	  

				
		 		 		 	  

  
 3

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