EX-10.2





 Exhibit 10.2 

POSEIDA THERAPEUTICS, INC. 

2015 EQUITY INCENTIVE PLAN 

ADOPTED BY THE BOARD OF DIRECTORS: FEBRUARY 5, 2015 

AMENDED BY THE BOARD OF DIRECTORS: MAY 4, 2015 

APPROVED BY THE STOCKHOLDERS: MAY 4, 2015 

AMENDED BY THE BOARD OF DIRECTORS: DECEMBER 15, 2015 

APPROVED BY THE STOCKHOLDERS: DECEMBER 15, 2015 

AMENDED BY THE BOARD OF DIRECTORS: MAY 25, 2016 

APPROVED BY THE STOCKHOLDERS: MAY 25, 2016 

AMENDED BY THE BOARD OF DIRECTORS: OCTOBER 24, 2018 

APPROVED BY THE STOCKHOLDERS: OCTOBER 24, 2018 

AMENDED BY THE BOARD OF DIRECTORS: MARCH 19, 2019 

APPROVED BY THE STOCKHOLDERS: MARCH 19, 2019 

AMENDED BY THE BOARD OF DIRECTORS: JUNE 23, 2020 

APPROVED BY THE STOCKHOLDERS: JUNE 23, 2020 

TERMINATION DATE: FEBRUARY 5, 2025 

1.    GENERAL. 

(a)    Eligible Stock Award Recipients. The persons eligible to receive Stock Awards are
Employees, Directors and Consultants. 
 (b)    Available Stock Awards. The Plan provides
for the grant of the following Stock Awards: (i) Incentive Stock Options; (ii) Nonstatutory Stock Options; (iii) Stock Appreciation Rights; (iv) Restricted Stock Awards; and (v) Restricted Stock Unit Awards. 

(c)    Purpose. The Company, by means of the Plan, seeks to secure and retain the services
of the group of persons eligible to receive Stock Awards as set forth in Section 1(a), to provide incentives for such persons to exert maximum efforts for the success of the Company and any Affiliate, and to provide a means by which such
eligible recipients may be given an opportunity to benefit from increases in value of the Common Stock through the granting of Stock Awards. 

2.    ADMINISTRATION. 

(a)    Administration by Board. The Board shall administer the Plan unless and until the
Board delegates administration of the Plan to a Committee or Committees, as provided in Section 2(c). 

(b)    Powers of Board. The Board shall have the power, subject to, and within the
limitations of, the express provisions of the Plan: 
 (i)    To determine from time to time
(A) which of the persons eligible under the Plan shall be granted Stock Awards, (B) when and how each Stock Award shall be granted, (C) what type or combination of types of Stock Award shall be granted, (D) the provisions of each
Stock Award granted (which need not be identical), including the time or times when a person shall be permitted to receive cash or Common Stock pursuant to a Stock Award, (E) the number of shares of Common Stock with respect to which a Stock
Award shall be granted to each such person, and (F) the Fair Market Value applicable to a Stock Award. 

  
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 (ii)    To construe and interpret the Plan and
Stock Awards granted under it, and to establish, amend and revoke rules and regulations for administration of the Plan. The Board, in the exercise of this power, may correct any defect, omission or inconsistency in the Plan or in any Stock Award
Agreement, in a manner and to the extent it shall deem necessary or expedient to make the Plan or Stock Award fully effective. 

(iii)    To settle all controversies regarding the Plan and Stock Awards granted under it. 

(iv)    To accelerate the time at which a Stock Award may first be exercised or the time during
which a Stock Award or any part thereof will vest in accordance with the Plan, notwithstanding the provisions in the Stock Award stating the time at which it may first be exercised or the time during which it will vest. 

(v)    To suspend or terminate the Plan at any time. Suspension or termination of the Plan shall
not impair rights and obligations under any Stock Award granted while the Plan is in effect except with the written consent of the affected Participant. 

(vi)    To amend the Plan in any respect the Board deems necessary or advisable, including, without
limitation, amendments relating to Incentive Stock Options and certain nonqualified deferred compensation under Section 409A of the Code and/or to bring the Plan or Stock Awards granted under the Plan into compliance therewith, subject to the
limitations, if any, of applicable law. However, except as provided in Section 9(a) relating to Capitalization Adjustments, to the extent required by applicable law, stockholder approval shall be required for any amendment of the Plan that
either (A) materially increases the number of shares of Common Stock available for issuance under the Plan, (B) materially expands the class of individuals eligible to receive Stock Awards under the Plan, (C) materially increases the
benefits accruing to Participants under the Plan or materially reduces the price at which shares of Common Stock may be issued or purchased under the Plan, (D) materially extends the term of the Plan, or (E) expands the types of Stock
Awards available for issuance under the Plan. Except as provided above, rights under any Stock Award granted before amendment of the Plan shall not be impaired by any amendment of the Plan unless (1) the Company requests the consent of the
affected Participant, and (2) such Participant consents in writing. 
 (vii)    To submit
any amendment to the Plan for stockholder approval, including, but not limited to, amendments to the Plan intended to satisfy the requirements of Section 422 of the Code regarding Incentive Stock Options. 

(viii)    To approve forms of Stock Award Agreements for use under the Plan and to amend the terms
of any one or more Stock Awards, including, but not limited to, amendments to provide terms more favorable to the Participant than previously provided in the Stock Award Agreement, subject to any specified limits in the Plan that are not subject to
Board discretion; provided, however, that except with respect to amendments that disqualify or impair the status of an Incentive Stock Option, a Participant’s rights under any Stock Award shall not be impaired by any such amendment
unless (A) the Company requests the consent of the affected Participant, and (B) such Participant consents in writing. Notwithstanding the foregoing, subject to the limitations of applicable law, if any, the Board may amend the terms of
any one or more Stock 

  
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Awards without the affected Participant’s consent if necessary to maintain the qualified status of the Stock Award as an Incentive Stock Option or to bring the Stock Award into compliance
with Section 409A of the Code. 
 (ix)    Generally, to exercise such powers and to perform
such acts as the Board deems necessary or expedient to promote the best interests of the Company and that are not in conflict with the provisions of the Plan or Stock Awards. 

(x)    To adopt such procedures and sub-plans as are
necessary or appropriate to permit participation in the Plan by Employees, Directors or Consultants who are foreign nationals or employed outside the United States. 

(xi)    To effect, at any time and from time to time, with the consent of any adversely affected
Participant, (A) the reduction of the exercise price (or strike price) of any outstanding Option or SAR under the Plan, (B) the cancellation of any outstanding Option or SAR under the Plan and the grant in substitution therefore of
(1) a new Option or SAR under the Plan or another equity plan of the Company covering the same or a different number of shares of Common Stock, (2) a Restricted Stock Award, (3) a Restricted Stock Unit Award, (4) cash and/or
(5) other valuable consideration (as determined by the Board, in its sole discretion), or (C) any other action that is treated as a repricing under generally accepted accounting principles; provided, however, that no such reduction
or cancellation may be effected if it is determined, in the Company’s sole discretion, that such reduction or cancellation would result in any such outstanding Option becoming subject to the requirements of Section 409A of the Code. 

(c)    Delegation to Committee. The Board may delegate some or all of the administration of
the Plan to a Committee or Committees. If administration of the Plan is delegated to a Committee, the Committee shall have, in connection with the administration of the Plan, the powers theretofore possessed by the Board that have been delegated to
the Committee, including the power to delegate to a subcommittee of the Committee any of the administrative powers the Committee is authorized to exercise (and references in this Plan to the Board shall thereafter be to the Committee or
subcommittee), subject, however, to such resolutions, not inconsistent with the provisions of the Plan, as may be adopted from time to time by the Board. The Committee may, at any time, abolish the subcommittee and/or revest in the Committee any
powers delegated to the subcommittee. The Board may retain the authority to concurrently administer the Plan with the Committee and may, at any time, revest in the Board some or all of the powers previously delegated. 

(d)    Delegation to an Officer. The Board may delegate to one or more Officers of the
Company the authority to do one or both of the following: (i) designate Officers and Employees of the Company or any of its Subsidiaries to be recipients of Options and Stock Appreciation Rights (and, to the extent permitted by applicable law,
other Stock Awards) and the terms thereof, and (ii) determine the number of shares of Common Stock to be subject to such Stock Awards granted to such Officers and Employees; provided, however, that the Board resolutions regarding such
delegation shall specify the total number of shares of Common Stock that may be subject to the Stock Awards granted by such Officer and that such Officer may not grant a Stock Award to himself or herself. Notwithstanding the foregoing, the Board may
not delegate authority to an Officer to determine the Fair Market Value pursuant to Section 13(t) below. 

  
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 (e)    Effect of Board’s Decision.
All determinations, interpretations and constructions made by the Board in good faith shall not be subject to review by any person and shall be final, binding and conclusive on all persons. 

3.    SHARES SUBJECT TO THE PLAN. 

(a)    Share Reserve. Subject to Section 9(a) relating to Capitalization Adjustments,
the aggregate number of shares of Common Stock that may be issued pursuant to Stock Awards from and after the Effective Date shall not exceed 545,974 shares (the “Share Reserve”). Further, if a Stock Award or any portion
thereof (i) expires or otherwise terminates without all of the shares covered by such Stock Award having been issued or (ii) is settled in cash (i.e., the Participant receives cash rather than stock), such expiration, termination or
settlement shall not reduce (or otherwise offset) the number of shares of Common Stock that may be available for issuance under the Plan. For clarity, the limitation in this Section 3(a) is a limitation in the number of shares of Common Stock
that may be issued pursuant to the Plan. Accordingly, this Section 3(a) does not limit the granting of Stock Awards except as provided in Section 7(a). 

(b)    Reversion of Shares to the Share Reserve. If any shares of Common Stock issued
pursuant to a Stock Award are forfeited back to or repurchased by the Company because of the failure to meet a contingency or condition required to vest such shares in the Participant, then the shares that are forfeited or repurchased shall revert
to and again become available for issuance under the Plan. Also, any shares reacquired by the Company pursuant to Section 8(g) or as consideration for the exercise of an Option shall again become available for issuance under the Plan.
Notwithstanding the provisions of this Section 3(b), any such shares shall not be subsequently issued pursuant to the exercise of Incentive Stock Options. 

(c)    Incentive Stock Option Limit. Notwithstanding anything to the contrary in this
Section 3 and subject to the provisions of Section 9(a) relating to Capitalization Adjustments, the aggregate maximum number of shares of Common Stock that may be issued pursuant to the exercise of Incentive Stock Options shall be
545,974 shares of Common Stock. 
 (d)    Source of Shares. The stock issuable
under the Plan shall be shares of authorized but unissued or reacquired Common Stock, including shares repurchased by the Company on the open market or otherwise. 

4.    ELIGIBILITY. 

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

  
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pursuant to a corporate transaction (such as a spin off transaction) or unless such Stock Awards comply with the distribution requirements of Section 409A of the Code. 

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

(c)    Consultants. A Consultant shall not be eligible for the grant of a Stock Award if, at
the time of grant, either the offer or sale of the Company’s securities to such Consultant is not exempt under Rule 701 because of the nature of the services that the Consultant is providing to the Company, because the Consultant is not a
natural person, or because of any other provision of Rule 701, unless the Company determines that such grant need not comply with the requirements of Rule 701 and will satisfy another exemption under the Securities Act as well as comply with the
securities laws of all other relevant jurisdictions. 
 5.    PROVISIONS RELATING
TO OPTIONS AND STOCK APPRECIATION RIGHTS. 

Each Option or SAR shall be in such form and shall contain such terms and conditions as the Board shall deem appropriate. All
Options shall be separately designated Incentive Stock Options or Nonstatutory Stock Options at the time of grant, and, if certificates are issued, a separate certificate or certificates shall be issued for shares of Common Stock purchased on
exercise of each type of Option. If an Option is not specifically designated as an Incentive Stock Option, then the Option shall be a Nonstatutory Stock Option. The provisions of separate Options or SARs need not be identical; provided,
however, that each Option Agreement or Stock Appreciation Right Agreement shall conform to (through incorporation of provisions hereof by reference in the applicable Stock Award Agreement or otherwise) the substance of each of the following
provisions: 
 (a)    Term. Subject to the provisions of Section 4(b) regarding Ten
Percent Stockholders, no Option or SAR shall be exercisable after the expiration of ten years from the date of its grant or such shorter period specified in the Stock Award Agreement. 

(b)    Exercise Price. Subject to the provisions of Section 4(b) regarding Incentive
Stock Options granted to Ten Percent Stockholders, the exercise price (or strike price) of each Option or SAR shall be not less than 100% of the Fair Market Value of the Common Stock subject to the Option or SAR on the date the Option or SAR is
granted. Notwithstanding the foregoing, an Option or SAR may be granted with an exercise price (or strike price) lower than 100% of the Fair Market Value of the Common Stock subject to the Option or SAR if such Option or SAR is granted pursuant to
an assumption of or substitution for another option or stock appreciation right pursuant to a Corporate Transaction and in a manner consistent with the provisions of Sections 409A and 424(a) of the Code (whether or not such stock awards are
Incentive Stock Options). Each SAR will be denominated in shares of Common Stock equivalents. 

(c)    Purchase Price for Options. The purchase price of Common Stock acquired pursuant to
the exercise of an Option shall be paid, to the extent permitted by applicable law and 

  
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as determined by the Board in its sole discretion, by any combination of the methods of payment set forth below. The Board shall have the authority to grant Options that do not permit all of the
following methods of payment (or otherwise restrict the ability to use certain methods) and to grant Options that require the consent of the Company to utilize a particular method of payment. The permitted methods of payment are as follows: 

(i)    by cash, check, bank draft or money order payable to the Company; 

(ii)    pursuant to a program developed under Regulation T as promulgated by the Federal Reserve
Board that, prior to the issuance of the stock subject to the Option, results in either the receipt of cash (or check) by the Company or the receipt of irrevocable instructions to pay the aggregate exercise price to the Company from the sales
proceeds; 
 (iii)    by delivery to the Company (either by actual delivery or attestation) of
shares of Common Stock; 
 (iv)    if the Option is a Nonstatutory Stock Option, by a “net
exercise” arrangement pursuant to which the Company will reduce the number of shares of Common Stock issued upon exercise by the largest whole number of shares with a Fair Market Value that does not exceed the aggregate exercise price;
provided, however, that the Company shall accept a cash or other payment from the Participant to the extent of any remaining balance of the aggregate exercise price not satisfied by such reduction in the number of whole shares to be issued;
provided further, that shares of Common Stock will no longer be outstanding under an Option and will not be exercisable thereafter to the extent that (A) shares are used to pay the exercise price pursuant to the “net exercise,”
(B) shares are delivered to the Participant as a result of such exercise, and (C) shares are withheld to satisfy tax withholding obligations; 

(v)    according to a deferred payment or similar arrangement with the Optionholder; provided,
however, that interest shall compound at least annually and shall be charged at the minimum rate of interest necessary to avoid (A) the imputation of interest income to the Company and compensation income to the Optionholder under any
applicable provisions of the Code, and (B) the classification of the Option as a liability for financial accounting purposes; or 

(vi)    in any other form of legal consideration that may be acceptable to the Board. 

(d)    Exercise and Payment of a SAR. To exercise any outstanding SAR, the Participant must
provide written notice of exercise to the Company in compliance with the provisions of the Stock Appreciation Right Agreement evidencing such SAR. The appreciation distribution payable on the exercise of a SAR will be not greater than an amount
equal to the excess of (A) the aggregate Fair Market Value (on the date of the exercise of the SAR) of a number of shares of Common Stock equal to the number of Common Stock equivalents in which the Participant is vested under such SAR, and
with respect to which the Participant is exercising the SAR on such date, over (B) the strike price that will be determined by the Board at the time of grant of the SAR. The appreciation distribution in respect to a SAR may be paid in Common
Stock, in cash, in any combination of the two or in any other form of consideration, as 

  
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determined by the Board and contained in the Stock Appreciation Right Agreement evidencing such SAR. 

(e)    Transferability of Options and SARs. Except as set forth in this Section 5(e) or
as otherwise determined by the Board under terms that are not prohibited by applicable tax and securities laws, Options and SARs shall not be transferable. The Board may, in its sole discretion, impose additional limitations on the transferability
of Options and SARs in the applicable Stock Award Agreement. 
 (i)    Restrictions on
Transfer. An Option or SAR shall not be transferable except by will or by the laws of descent and distribution and shall be exercisable during the lifetime of the Participant only by the Participant; provided, however, that the Board may,
in its sole discretion, permit transfer of the Option or SAR and in a manner that is not prohibited by applicable tax and securities laws (including but not limited to Rule 701) upon the Participant’s request. Except as explicitly provided
herein, neither an Option nor a SAR may be transferred for consideration. 
 (ii)    Domestic
Relations Orders. Upon receiving written permission from the Board or its duly authorized designee, an Option or SAR may be transferred pursuant to a domestic relations order; provided, however, that if an Option is an Incentive Stock
Option, such Option may be deemed to be a Nonstatutory Stock Option as a result of such transfer. 

(iii)    Beneficiary Designation. Upon receiving written permission from the Board or its
duly authorized designee, the Participant may, by delivering written notice to the Company, in a form provided by or otherwise satisfactory to the Company, designate a third party who, in the event of the death of the Participant, shall thereafter
be the beneficiary of the Option or SAR with the right to exercise the Option or SAR and receive the Common Stock or other consideration resulting from such exercise. In the absence of such a designation, the executor or administrator of the
Participant’s estate shall be entitled to exercise the Option or SAR and receive the Common Stock or other consideration resulting from such exercise. 

(f)    Vesting Generally. The total number of shares of Common Stock subject to an Option or
SAR may vest and therefore become exercisable in periodic installments that may or may not be equal. The Option or SAR may be subject to such other terms and conditions on the time or times when it may or may not be exercised (which may be based on
the satisfaction of performance goals or other criteria) as the Board may deem appropriate. The vesting provisions of individual Options or SARs may vary. The provisions of this Section 5(f) are subject to any Option or SAR provisions governing
the minimum number of shares of Common Stock as to which an Option or SAR may be exercised. 

(g)    Termination of Continuous Service. Except as otherwise provided in the applicable
Stock Award Agreement or other agreement between the Participant and the Company, in the event that a Participant’s Continuous Service terminates (other than for Cause or upon the Participant’s death or Disability), the Participant may
exercise his or her Option or SAR (to the extent that the Participant was entitled to exercise such Stock Award as of the date of termination of Continuous Service) but only within such period of time ending on the earlier of (i) the date three
months following the termination of the Participant’s Continuous Service (or 

  
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such longer or shorter period specified in the applicable Stock Award Agreement, which period shall not be less than 30 days if necessary to comply with applicable laws unless such termination is
for Cause) or (ii) the expiration of the term of the Option or SAR as set forth in the Stock Award Agreement. If, after termination of Continuous Service, the Participant does not exercise his or her Option or SAR within the time specified
herein or in the Stock Award Agreement (as applicable), the Option or SAR shall terminate. 

(h)    Extension of Termination Date. Except as otherwise provided in the applicable Stock
Award Agreement or other agreement between the Participant and the Company, if the exercise of the Option or SAR following the termination of the Participant’s Continuous Service (other than for Cause or upon the Participant’s death or
Disability) would be prohibited at any time solely because the issuance of shares of Common Stock would violate the registration requirements under the Securities Act, then the Option or SAR shall terminate on the earlier of (i) the expiration
of a total period of three months (that need not be consecutive) after the termination of the Participant’s Continuous Service during which the exercise of the Option or SAR would not be in violation of such registration requirements, or
(ii) the expiration of the term of the Option or SAR as set forth in the applicable Stock Award Agreement. In addition, unless otherwise provided in a Participant’s Stock Award Agreement, if the immediate sale of any Common Stock received
upon exercise of an Option or SAR following the termination of the Participant’s Continuous Service (other than for Cause) would violate the Company’s insider trading policy, then the Option or SAR shall terminate on the earlier of
(i) the expiration of a period equal to the applicable post-termination exercise period after the termination of the Participant’s Continuous Service during which the sale of Common Stock received upon exercise of the Option or SAR would
not be in-violation of the Company’s insider trading policy, or (ii) the expiration of the term of the Option or SAR as set forth in the applicable Stock Award Agreement. 

(i)    Disability of Participant. Except as otherwise provided in the applicable Stock Award
Agreement or other agreement between the Participant and the Company, in the event that a Participant’s Continuous Service terminates as a result of the Participant’s Disability, the Participant may exercise his or her Option or SAR (to
the extent that the Participant was entitled to exercise such Option or SAR as of the date of termination of Continuous Service), but only within such period of time ending on the earlier of (i) the date 12 months following such termination of
Continuous Service (or such longer or shorter period specified in the Stock Award Agreement, which period shall not be less than six months if necessary to comply with applicable laws), or (ii) the expiration of the term of the Option or SAR as
set forth in the Stock Award Agreement. If, after termination of Continuous Service, the Participant does not exercise his or her Option or SAR within the time specified herein or in the Stock Award Agreement (as applicable), the Option or SAR shall
terminate. 
 (j)    Death of Participant. Except as otherwise provided in the applicable
Stock Award Agreement or other agreement between the Participant and the Company, in the event that (i) a Participant’s Continuous Service terminates as a result of the Participant’s death, or (ii) the Participant dies within the
period (if any) specified in the Stock Award Agreement after the termination of the Participant’s Continuous Service for a reason other than death, then the Option or SAR may be exercised (to the extent the Participant was entitled to exercise
such Option or SAR as of the date of death) by the Participant’s estate or by a person who acquired 

  
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the right to exercise the Option or SAR by bequest or inheritance or by a person designated to exercise the Option or SAR upon the Participant’s death, but only within the period ending on
the earlier of (i) the date 18 months following the date of death (or such longer or shorter period specified in the Stock Award Agreement, which period shall not be less than six months if necessary to comply with applicable laws), or
(ii) the expiration of the term of such Option or SAR as set forth in the Stock Award Agreement. If, after the Participant’s death, the Option or SAR is not exercised within the time specified herein or in the Stock Award Agreement (as
applicable), the Option or SAR shall terminate. 
 (k)    Termination for Cause. Except as
explicitly provided otherwise in a Participant’s Stock Award Agreement, if a Participant’s Continuous Service is terminated for Cause, the Option or SAR shall terminate upon the termination date of such Participant’s Continuous
Service, and the Participant shall be prohibited from exercising his or her Option or SAR from and after the time of such termination of Continuous Service. 

(l)    Non-Exempt Employees. No Option or SAR
granted to an Employee who is a non-exempt employee for purposes of the Fair Labor Standards Act of 1938, as amended, shall be first exercisable for any shares of Common Stock until at least six months
following the date of grant of the Option or SAR. Notwithstanding the foregoing, consistent with the provisions of the Worker Economic Opportunity Act, (i) in the event of the Participant’s death or Disability, (ii) upon a Corporate
Transaction in which such Option or SAR is not assumed, continued or substituted, (iii) upon a Change in Control in which the vesting of such Options or SARs accelerates, or (iv) upon the Participant’s retirement (as such term is
defined for purposes of the Fair Labor Standards Act of 1938), the vested portion of any Options and SARs may be exercised earlier than six months following the date of grant. The foregoing provision is intended to operate so that any income derived
by a non-exempt employee in connection with the exercise or vesting of an Option or SAR will be exempt from his or her regular rate of pay. 

(m)    Early Exercise of Options. An Option may, but need not, include a provision whereby
the Optionholder may elect at any time before the Optionholder’s Continuous Service terminates to exercise the Option as to any part or all of the shares of Common Stock subject to the Option prior to the full vesting of the Option. Subject to
the “Repurchase Limitation” in Section 8(k), any unvested shares of Common Stock so purchased may be subject to a repurchase right in favor of the Company or to any other restriction the Board determines to be appropriate. Provided
that the “Repurchase Limitation” in Section 8(k) is not violated, the Company shall not be required to exercise its repurchase right until at least six months (or such longer or shorter period of time required to avoid classification
of the Option as a liability for financial accounting purposes) have elapsed following exercise of the Option unless the Board otherwise specifically provides in the Option Agreement. 

(n)    Right of Repurchase. Subject to the “Repurchase Limitation” in
Section 8(k), an Option or SAR may include a provision whereby the Company may elect to repurchase all or any part of the vested shares of Common Stock acquired by the Participant pursuant to the exercise of the Option or SAR. 

(o)    Right of First Refusal. An Option or SAR may include a provision whereby the Company
may elect to exercise a right of first refusal following receipt of notice from the 

  
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Participant of the intent to transfer all or any part of the shares of Common Stock received upon the exercise of the Option or SAR. Such right of first refusal shall be subject to the
“Repurchase Limitation” in Section 8(k). Except as expressly provided in this Section 5(o) or in the Stock Award Agreement, such right of first refusal shall otherwise comply with any applicable provisions of the bylaws of the
Company. 
 6.    PROVISIONS OF RESTRICTED STOCK
AWARDS AND RESTRICTED STOCK UNITS. 

(a)    Restricted Stock Awards. Each Restricted Stock Award Agreement shall be in such form
and shall contain such terms and conditions as the Board shall deem appropriate. To the extent consistent with the Company’s bylaws, at the Board’s election, shares of Common Stock may be (A) held in book entry form subject to the
Company’s instructions until any restrictions relating to the Restricted Stock Award lapse, or (B) evidenced by a certificate, which certificate shall be held in such form and manner as determined by the Board. The terms and conditions of
Restricted Stock Award Agreements may change from time to time, and the terms and conditions of separate Restricted Stock Award Agreements need not be identical; provided, however, that each Restricted Stock Award Agreement shall conform to
(through incorporation of the provisions hereof by reference in the agreement or otherwise) the substance of each of the following provisions: 

(i)    Consideration. A Restricted Stock Award may be awarded in consideration for
(A) cash or cash equivalents, (B) past or future services actually or to be rendered to the Company or an Affiliate, or (C) any other form of legal consideration that may be acceptable to the Board in its sole discretion and
permissible under applicable law. 
 (ii)    Vesting. Subject to the “Repurchase
Limitation” in Section 8(k), shares of Common Stock awarded under the Restricted Stock Award Agreement may be subject to forfeiture to the Company in accordance with a vesting schedule to be determined by the Board. 

(iii)    Termination of Participant’s Continuous Service. If a Participant’s
Continuous Service terminates, the Company may receive through a forfeiture condition or a repurchase right, any or all of the shares of Common Stock held by the Participant that have not vested as of the date of termination of Continuous Service
under the terms of the Restricted Stock Award Agreement. 
 (iv)    Transferability.
Rights to acquire shares of Common Stock under the Restricted Stock Award Agreement shall be transferable by the Participant only upon such terms and conditions as are set forth in the Restricted Stock Award Agreement, as the Board shall
determine in its sole discretion, so long as Common Stock awarded under the Restricted Stock Award Agreement remains subject to the terms of the Restricted Stock Award Agreement. 

(v)    Dividends. A Restricted Stock Award Agreement may provide that any dividends paid on
Restricted Stock will be subject to the same vesting and forfeiture restrictions as apply to the shares subject to the Restricted Stock Award to which they relate. 

(b)    Restricted Stock Unit Awards. Each Restricted Stock Unit Award Agreement shall be in
such form and shall contain such terms and conditions as the Board shall deem appropriate. The terms and conditions of Restricted Stock Unit Award Agreements may change 

  
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from time to time, and the terms and conditions of separate Restricted Stock Unit Award Agreements need not be identical, provided, however, that each Restricted Stock Unit Award Agreement
shall conform to (through incorporation of the provisions hereof by reference in the Agreement or otherwise) the substance of each of the following provisions: 

(i)    Consideration. At the time of grant of a Restricted Stock Unit Award, the Board will
determine the consideration, if any, to be paid by the Participant upon delivery of each share of Common Stock subject to the Restricted Stock Unit Award. The consideration to be paid (if any) by the Participant for each share of Common Stock
subject to a Restricted Stock Unit Award may be paid in any form of legal consideration that may be acceptable to the Board in its sole discretion and permissible under applicable law. 

(ii)    Vesting. At the time of the grant of a Restricted Stock Unit Award, the Board may
impose such restrictions or conditions to the vesting of the Restricted Stock Unit Award as it, in its sole discretion, deems appropriate. 

(iii)    Payment. A Restricted Stock Unit Award may be settled by the delivery of shares of
Common Stock, their cash equivalent, any combination thereof or in any other form of consideration, as determined by the Board and contained in the Restricted Stock Unit Award Agreement. 

(iv)    Additional Restrictions. At the time of the grant of a Restricted Stock Unit Award,
the Board, as it deems appropriate, may impose such restrictions or conditions that delay the delivery of the shares of Common Stock (or their cash equivalent) subject to a Restricted Stock Unit Award to a time after the vesting of such Restricted
Stock Unit Award. 
 (v)    Dividend Equivalents. Dividend equivalents may be credited in
respect of shares of Common Stock covered by a Restricted Stock Unit Award, as determined by the Board and contained in the Restricted Stock Unit Award Agreement. At the sole discretion of the Board, such dividend equivalents may be converted into
additional shares of Common Stock covered by the Restricted Stock Unit Award in such manner as determined by the Board. Any additional shares covered by the Restricted Stock Unit Award credited by reason of such dividend equivalents will be subject
to all the terms and conditions of the underlying Restricted Stock Unit Award Agreement to which they relate. 

(vi)    Termination of Participant’s Continuous Service. Except as otherwise provided
in the applicable Restricted Stock Unit Award Agreement, such portion of the Restricted Stock Unit Award that has not vested will be forfeited upon the Participant’s termination of Continuous Service. 

(vii)    Compliance with Section 409A of the Code. Notwithstanding
anything to the contrary set forth herein, any Restricted Stock Unit Award granted under the Plan that is not exempt from the requirements of Section 409A of the Code shall contain such provisions so that such Restricted Stock Unit Award will
comply with the requirements of Section 409A of the Code. Such restrictions, if any, shall be determined by the Board and contained in the Restricted Stock Unit Award Agreement evidencing such Restricted Stock Unit Award. For example, such
restrictions may include, without limitation, a requirement that any Common Stock that is to be 

  
 11. 













 
issued in a year following the year in which the Restricted Stock Unit Award vests must be issued in accordance with a fixed pre-determined schedule. 

7.    COVENANTS OF THE COMPANY. 

(a)    Availability of Shares. During the terms of the Stock Awards, the Company shall keep
available at all times the number of shares of Common Stock reasonably required to satisfy such Stock Awards. 

(b)    Securities Law Compliance. The Company shall seek to obtain from each regulatory
commission or agency having jurisdiction over the Plan such authority as may be required to grant Stock Awards and to issue and sell shares of Common Stock upon exercise of the Stock Awards; provided, however, that this undertaking shall not
require the Company to register under the Securities Act the Plan, any Stock Award or any Common Stock issued or issuable pursuant to any such Stock Award. If, after reasonable efforts, the Company is unable to obtain from any such regulatory
commission or agency the authority that counsel for the Company deems necessary for the lawful issuance and sale of Common Stock under the Plan, the Company shall be relieved from any liability for failure to issue and sell Common Stock upon
exercise of such Stock Awards unless and until such authority is obtained. A Participant shall not be eligible for the grant of a Stock Award or the subsequent issuance of Common Stock pursuant to the Stock Award if such grant or issuance would be
in violation of any applicable securities law. 
 (c)    No Obligation to Notify or Minimize
Taxes. The Company shall have no duty or obligation to any Participant to advise such holder as to the time or manner of exercising such Stock Award. Furthermore, the Company shall have no duty or obligation to warn or otherwise advise such
holder of a pending termination or expiration of a Stock Award or a possible period in which the Stock Award may not be exercised. The Company has no duty or obligation to minimize the tax consequences of a Stock Award to the holder of such Stock
Award. 
 8.    MISCELLANEOUS. 

(a)    Use of Proceeds from Sales of Common Stock. Proceeds from the sale of shares of
Common Stock pursuant to Stock Awards shall constitute general funds of the Company. 

(b)    Corporate Action Constituting Grant of Stock Awards. Corporate action constituting a
grant by the Company of a Stock Award to any Participant shall be deemed completed as of the date of such corporate action, unless otherwise determined by the Board, regardless of when the instrument, certificate, or letter evidencing the Stock
Award is communicated to, or actually received or accepted by, the Participant. 

(c)    Stockholder Rights. No Participant shall be deemed to be the holder of, or to have
any of the rights of a holder with respect to, any shares of Common Stock subject to such Stock Award unless and until (i) such Participant has satisfied all requirements for the exercise of the Stock Award, or the issuance of shares
thereunder, pursuant to its terms, and (ii) the issuance of the Common Stock pursuant to the Stock Award has been entered into the books and records of the Company. 

  
 12. 













 (d)    No Employment or Other Service Rights.
Nothing in the Plan, any Stock Award Agreement or any other instrument executed thereunder or in connection with any Stock Award granted pursuant thereto shall confer upon any Participant any right to continue to serve the Company or an
Affiliate in the capacity in effect at the time the Stock Award was granted or shall affect the right, of the Company or an Affiliate to terminate (i) the employment of an Employee with or without notice and with or without cause, (ii) the
service of a Consultant pursuant to the terms of such Consultant’s agreement with the Company or an Affiliate, or (iii) the service of a Director pursuant to the bylaws of the Company or an Affiliate, and any applicable provisions of the
corporate law of the state in which the Company or the Affiliate is incorporated, as the case may be. 

(e)    Incentive Stock Option $100,000 Limitation. To the extent that the aggregate Fair
Market Value (determined at the time of grant) of Common Stock with respect to which Incentive Stock Options are exercisable for the first time by any Optionholder during any calendar year (under all plans of the Company and any Affiliates) exceeds
$100,000, the Options or portions thereof that exceed such limit (according to the order in which they were granted) shall be treated as Nonstatutory Stock Options, notwithstanding any contrary provision of the applicable Option Agreement. 

(f)    Investment Assurances. The Company may require a Participant, as a condition of
exercising or acquiring Common Stock under any Stock Award, (i) to give written assurances satisfactory to the Company as to the Participant’s knowledge and experience in financial and business matters and/or to employ a purchaser
representative reasonably satisfactory to the Company who is knowledgeable and experienced in financial and business matters and that he or she is capable of evaluating, alone or together with the purchaser representative, the merits and risks of
exercising the Stock Award, and (ii) to give written assurances satisfactory to the Company stating that the Participant is acquiring Common Stock subject to the Stock Award for the Participant’s own account and not with any present
intention of selling or otherwise distributing the Common Stock. The foregoing requirements, and any assurances given pursuant to such requirements, shall be inoperative if (x) the issuance of the shares upon the exercise or acquisition of
Common Stock under the Stock Award has been registered under a then currently effective registration statement under the Securities Act, or (y) as to any particular requirement, a determination is made by counsel for the Company that such
requirement need not be met in the circumstances under the then applicable securities laws. The Company may, upon advice of counsel to the Company, place legends on stock certificates issued under the Plan as such counsel deems necessary or
appropriate in order to comply with applicable securities laws, including, but not limited to, legends restricting the transfer of the Common Stock. 

(g)    Withholding Obligations. Unless prohibited by the terms of a Stock Award Agreement,
the Company may, in its sole discretion, satisfy any federal, state or local tax withholding obligation relating to a Stock Award by any of the following means (in addition to the Company’s right to withhold from any compensation paid to the
Participant by the Company) or by a combination of such means: (i) causing the Participant to tender a cash payment; (ii) withholding shares of Common Stock from the shares of Common Stock issued or otherwise issuable to the Participant in
connection with the Stock Award; provided, however, that no shares of Common Stock are withheld with a value exceeding the minimum amount of tax required to be withheld by law (or such lesser amount as may be necessary to avoid classification
of the 

  
 13. 













 
Stock Award as a liability for financial accounting purposes); (iii) withholding payment from any amounts otherwise payable to the Participant; (iv) withholding cash from a Stock Award
settled in cash; or (v) by such other method as may be set forth in the Stock Award Agreement. 

(h)    Electronic Delivery. Any reference herein to a “written” agreement or
document shall include any agreement or document delivered electronically or posted on the Company’s intranet. 

(i)    Deferrals. To the extent permitted by applicable law, the Board, in its sole
discretion, may determine that the delivery of Common Stock or the payment of cash, upon the exercise, vesting or settlement of all or a portion of any Stock Award may be deferred and may establish programs and procedures for deferral elections to
be made by Participants. Deferrals by Participants will be made in accordance with Section 409A of the Code. Consistent with Section 409A of the Code, the Board may provide for distributions while a Participant is still an employee. The
Board is authorized to make deferrals of Stock Awards and determine when, and in what annual percentages, Participants may receive payments, including lump sum payments, following the Participant’s termination of employment or retirement, and
implement such other terms and conditions consistent with the provisions of the Plan and in accordance with applicable law. 

(j)    Compliance with Section 409A. To the extent that the Board
determines that any Stock Award granted hereunder is subject to Section 409A of the Code, the Stock Award Agreement evidencing such Stock Award shall incorporate the terms and conditions necessary to avoid the consequences specified in
Section 409A(a)(1) of the Code. To the extent applicable, the Plan and Stock Award Agreements shall be interpreted in accordance with Section 409A of the Code. 

(k)    Repurchase Limitation. The terms of any repurchase right shall be specified in the
Stock Award Agreement. The repurchase price for vested shares of Common Stock shall be the Fair Market Value of the shares of Common Stock on the date of repurchase. The repurchase price for unvested shares of Common Stock shall be the lower of
(i) the Fair Market Value of the shares of Common Stock on the date of repurchase or (ii) their original purchase price. However, the Company shall not exercise its repurchase right until at least six months (or such longer or shorter
period of time necessary to avoid classification of the Stock Award as a liability for financial accounting purposes) have elapsed following delivery of shares of Common Stock subject to the Stock Award, unless otherwise specifically provided by the
Board. 
 9.    ADJUSTMENTS UPON CHANGES IN
COMMON STOCK; OTHER CORPORATE EVENTS. 

(a)    Capitalization Adjustments. In the event of a Capitalization Adjustment, the Board
shall appropriately and proportionately adjust: (i) the class(es) and maximum number of securities subject to the Plan pursuant to Section 3(a); (ii) the class(es) and maximum number of securities that may be issued pursuant to the
exercise of Incentive Stock Options pursuant to Section 3(c); and (iii) the class(es) and number of securities and price per share of stock subject to outstanding Stock Awards. The Board shall make such adjustments, and its determination
shall be final, binding and conclusive. 

  
 14. 













 (b)    Dissolution or Liquidation. Except
as otherwise provided in the Stock Award Agreement, in the event of a dissolution or liquidation of the Company, all outstanding Stock Awards (other than Stock Awards consisting of vested and outstanding shares of Common Stock not subject to a
forfeiture condition or the Company’s right of repurchase) shall terminate immediately prior to the completion of such dissolution or liquidation, and the shares of Common Stock subject to the Company’s repurchase rights or subject to a
forfeiture condition may be repurchased or reacquired by the Company notwithstanding the fact that the holder of such Stock Award is providing Continuous Service. 

(c)    Corporate Transaction. The following provisions shall apply to Stock Awards in the
event of a Corporate Transaction unless otherwise provided in the instrument evidencing the Stock Award or any other written agreement between the Company or any Affiliate and the holder of the Stock Award or unless otherwise expressly provided by
the Board at the time of grant of a Stock Award. Except as otherwise stated in the Stock Award Agreement, in the event of a Corporate Transaction, then, notwithstanding any other provision of the Plan, the Board may take one or more of the following
actions with respect to Stock Awards, contingent upon the closing or completion of the Corporate Transaction: 

(i)    arrange for the surviving corporation or acquiring corporation (or the surviving or acquiring
corporation’s parent company) to assume or continue all or any portion of the Stock Award or to substitute a similar stock award for all or any portion of the Stock Award (including, but not limited to, an award to acquire the same
consideration paid to the stockholders of the Company pursuant to the Corporate Transaction); 

(ii)    arrange for the assignment of any reacquisition or repurchase rights held by the Company in
respect of Common Stock issued pursuant to the Stock Award to the surviving corporation or acquiring corporation (or the surviving or acquiring corporation’s parent company); 

(iii)    accelerate the vesting, in whole or in part, of the Stock Award (and, if applicable, the
time at which the Stock Award may be exercised), with such Stock Award terminating if not exercised (if applicable) at or prior to the effective time of the Corporate Transaction; provided, however, that the Board may require Participants to
complete and deliver to the Company a notice of exercise before the effective date of a Corporate Transaction, which is contingent upon the effectiveness of such Corporate Transaction; 

(iv)    arrange for the lapse of any reacquisition or repurchase rights held by the Company with
respect to the Stock Award; 
 (v)    cancel or arrange for the cancellation of all or any
portion of the Stock Award, to the extent not vested or not exercised prior to the effective time of the Corporate Transaction, in exchange for such cash consideration, if any, as the Board, in its sole discretion, may consider appropriate; and 


  
 15. 













 (vi)    make a payment, in such form as may be
determined by the Board equal to the excess, if any, of (A) the value of the property the holder of the Stock Award would have received upon the exercise of the Stock Award, over (B) any exercise price payable by such holder in connection
with such exercise. For clarity, this payment may be zero ($0) if the value of the property is equal to or less than the exercise price. Payments under this provision may be delayed to the same extent that payment of consideration to the holders of
the Company’s Common Stock in connection with the Corporate Transaction is delayed as a result of escrows, earn outs, holdbacks or any other contingencies. 

The Board need not take the same action with respect to all Stock Awards or with respect to all Participants. The Board may take different
actions with respect to the vested and unvested portions of a Stock Award. 
 (d)    Change in
Control. A Stock Award may be subject to additional acceleration of vesting and exercisability upon or after a Change in Control as may be provided in the Stock Award Agreement for such Stock Award or as may be provided in any other written
agreement between the Company or any Affiliate and the Participant, but in the absence of such provision, no such acceleration shall occur. 

10.    TERMINATION OR SUSPENSION OF THE
PLAN. 
 (a)    Plan Term. The Board may suspend or terminate the Plan
at any time. Unless sooner terminated by the Board pursuant to Section 2, the Plan shall automatically terminate on the day before the tenth anniversary of the earlier of (i) the date the Plan is adopted by the Board, or (ii) the date
the Plan is approved by the stockholders of the Company. No Stock Awards may be granted under the Plan while the Plan is suspended or after it is terminated. 

(b)    No Impairment of Rights. Suspension or termination of the Plan shall not impair
rights and obligations under any Stock Award granted while the Plan is in effect except with the written consent of the affected Participant. 

11.    EFFECTIVE DATE OF PLAN. 

This Plan shall become effective on the Effective Date. 

12.    CHOICE OF LAW. 

The law of the State of Delaware shall govern all questions concerning the construction, validity and interpretation of this
Plan, without regard to that state’s conflict of laws rules. 
 13.    DEFINITIONS. As
used in the Plan, the following definitions shall apply to the capitalized terms indicated below: 

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

  
 16. 













 (b)    “Board” means the
Board of Directors of the Company. 
 (c)    “Capitalization Adjustment”
means any change that is made in, or other events that occur with respect to, the Common Stock subject to the Plan or subject to any Stock Award after the Effective Date without the receipt of consideration by the Company (through merger,
consolidation, reorganization, recapitalization, reincorporation, stock dividend, dividend in property other than cash, large nonrecurring cash dividend, stock split, reverse stock split liquidating dividend, combination of shares, exchange of
shares, change in corporate structure, or any similar equity restructuring transaction, as that term is used in Financial Accounting Standards Board Accounting Standards Codification Topic 718. Notwithstanding the foregoing, the conversion of any
convertible securities of the Company shall not be treated as a Capitalization Adjustment. 

(d)    “Cause” shall have the meaning ascribed to such term in any written
agreement between the Participant and the Company defining such term and, in the absence of such agreement, such term means with respect to a Participant, the occurrence of any of the following events: (i) such Participant’s commission of
any felony or any crime involving fraud, dishonesty or moral turpitude under the laws of the United States or any state thereof; (ii) such Participant’s attempted commission of, or participation in, a fraud or act of dishonesty against the
Company; (iii) such Participant’s intentional, material violation of any contract or agreement between the Participant and the Company or of any statutory duty owed to the Company; (iv) such Participant’s unauthorized use or
disclosure of the Company’s confidential information or trade secrets; or (v) such Participant’s gross misconduct. The determination that a termination of the Participant’s Continuous Service is either for Cause or without Cause
shall be made by the Company in its sole discretion. Any determination by the Company that the Continuous Service of a Participant was terminated with or without Cause for the purposes of outstanding Stock Awards held by such Participant shall have
no effect upon any determination of the rights or obligations of the Company or such Participant for any other purpose. 

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

  
 17. 













 
other acquisition had not occurred, increases the percentage of the then outstanding voting securities Owned by the Subject Person over the designated percentage threshold, then a Change in
Control shall be deemed to occur; 
 (ii)    there is consummated a merger, consolidation or
similar transaction involving (directly or indirectly) the Company and, immediately after the consummation of such merger, consolidation or similar transaction, the stockholders of the Company immediately prior thereto do not Own, directly or
indirectly, either (A) outstanding voting securities representing more than 50% of the combined outstanding voting power of the surviving Entity in such merger, consolidation or similar transaction or (B) more than 50% of the combined
outstanding voting power of the parent of the surviving Entity in such merger, consolidation or similar transaction, in each case in substantially the same proportions as their Ownership of the outstanding voting securities of the Company
immediately prior to such transaction; or 
 (iii)    there is consummated a sale, lease,
exclusive license or other disposition of all or substantially all of the consolidated assets of the Company and its Subsidiaries, other than a sale, lease, license or other disposition of all or substantially all of the consolidated assets of the
Company and its Subsidiaries to an Entity, more than 50% of the combined voting power of the voting securities of which are Owned by stockholders of the Company in substantially the same proportions as their Ownership of the outstanding voting
securities of the Company immediately prior to such sale, lease, license or other disposition. 
 Notwithstanding the foregoing definition
or any other provision of this Plan, (A) the term Change in Control shall not include a sale of assets, merger or other transaction effected exclusively for the purpose of changing the domicile of the Company, and (B) the definition of
Change in Control (or any analogous term) in an individual written agreement between the Company or any Affiliate and the Participant shall supersede the foregoing definition with respect to Stock Awards subject to such agreement; provided,
however, that if no definition of Change in Control or any analogous term is set forth in such an individual written agreement, the foregoing definition shall apply. 

(f)    “Code” means the Internal Revenue Code of 1986, as amended,
including any applicable regulations and guidance thereunder. 

(g)    “Committee” means a committee of one or more Directors to whom
authority has been delegated by the Board in accordance with Section 2(c). 

(h)    “Common Stock” means the common stock of the Company. 

(i)    “Company” means Poseida Therapeutics, Inc., a Delaware limited
liability company. 
 (j)    “Consultant” means any person, including an
advisor, who is (i) engaged by the Company or an Affiliate to render consulting or advisory services and is compensated for such services, or (ii) serving as a member of the board of directors of an Affiliate and is compensated for such
services. However, service solely as a Director, or payment of a fee for such service, shall not cause a Director to be considered a “Consultant” for purposes of the Plan. 

  
 18. 













 (k)    “Continuous
Service” means that the Participant’s service with the Company or an Affiliate, whether as an Employee, Director or Consultant, is not interrupted or terminated. A change in the capacity in which the Participant renders service to
the Company or an Affiliate as an Employee, Director, or Consultant or a change-in the Entity for which the Participant renders such service, provided that there is no interruption or termination of the
Participant’s service with the Company or an Affiliate, shall not terminate a Participant’s Continuous Service; provided, however, that if the Entity for which a Participant is rendering service ceases to qualify as an Affiliate, as
determined by the Board in its sole discretion, such Participant’s Continuous Service shall be considered to have terminated on the date such Entity ceases to qualify as an Affiliate. For example, a change in status from an employee of the
Company to a consultant of an Affiliate or to a Director shall not constitute an interruption of Continuous Service. To the extent permitted by law, the Board or the chief executive officer of the Company, in that party’s sole discretion, may
determine whether Continuous Service shall be considered interrupted in the case of (i) any leave of absence approved by the Board or chief executive officer, including sick leave, military leave or any other personal leave, or
(ii) transfers between the Company, an Affiliate, or their successors. Notwithstanding the foregoing, a leave of absence shall be treated as Continuous Service for purposes of vesting in a Stock Award only to such extent as may be provided in
the Company’s leave of absence policy, in the written terms of any leave of absence agreement or policy applicable to the Participant, or as otherwise required by law. 

(l)    “Corporate Transaction” means the occurrence, in a single
transaction or in a series of related transactions, of any one or more of the following events: 

(i)    the consummation of a sale or other disposition of all or substantially all, as determined by
the Board in its sole discretion, of the consolidated assets of the Company and its Subsidiaries; 

(ii)    the consummation of a sale or other disposition of at least 50% of the outstanding
securities of the Company; 
 (iii)    the consummation of a merger, consolidation or similar
transaction following which the Company is not the surviving corporation; or 
 (iv)    the
consummation of a merger, consolidation or similar transaction following which the Company is the surviving corporation but the shares of Common Stock outstanding immediately preceding the merger, consolidation or similar transaction are converted
or exchanged by virtue of the merger, consolidation or similar transaction into other property, whether in the form of securities, cash or otherwise. 

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

(n)    “Disability” means, with respect to a Participant, the inability of
a Participant to engage in any substantially gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted or can be expected to last for a continuous period of
not less than 12 months as provided in Sections 22(e)(3) and 409A(a)(2)(c)(i) of the Code and shall be determined by the Board on the basis of such medical evidence as the Board deems warranted under the circumstances. 

  
 19. 













 (o)    “Effective Date”
means the effective date of this Plan, which is the earlier of (i) the date that this Plan is first approved by the Company’s stockholders, or (ii) the date this Plan is adopted by the Board. 

(p)    “Employee” means any person employed by the Company or an Affiliate.
However, service solely as a Director, or payment of a fee for such services, shall not cause a Director to be considered an “Employee” for purposes of the Plan. 

(q)    “Entity” means a corporation, partnership, limited liability company
or other entity. 
 (r)    “Exchange Act” means the Securities Exchange
Act of 1934, as amended, and the rules and regulations promulgated thereunder. 

(s)    “Exchange Act Person” means any natural person, Entity or
“group” (within the meaning of Section 13(d) or 14(d) of the Exchange Act), except that “Exchange Act Person” shall not include (i) the Company or any Subsidiary of the Company, (ii) any employee benefit plan of
the Company or any Subsidiary of the Company or any trustee or other fiduciary holding securities under an employee benefit plan of the Company or any Subsidiary of the Company, (iii) an underwriter temporarily holding securities pursuant to an
offering of such securities, (iv) an Entity Owned, directly or indirectly, by the stockholders of the Company in substantially the same proportions as their Ownership of stock of the Company; or (v) any natural person, Entity or
“group” (within the meaning of Section 13(d) or 14(d) of the Exchange Act) that, as of the Effective Date, is the Owner, directly or indirectly, of securities of the Company representing more than 50% of the combined voting power of
the Company’s then outstanding securities. 
 (t)    “Fair Market
Value” means, as of any date, the value of the Common Stock determined by the Board in compliance with Section 409A of the Code or, in the case of an Incentive Stock Option, in compliance with Section 422 of the Code. 

(u)    “Incentive Stock Option” means an option that qualifies as an
“incentive stock option” within the meaning of Section 422 of the Code and the regulations promulgated thereunder. 

(v)    “Nonstatutory Stock Option” means an Option that does not qualify as
an Incentive Stock Option. 
 (w)    “Officer” means any person
designated by the Company as an officer. 
 (x)    “Option” means an
Incentive Stock Option or a Nonstatutory Stock Option to purchase shares of Common Stock granted pursuant to the Plan. 

(y)    “Option Agreement” means a written agreement between the Company and
an Optionholder evidencing the terms and conditions of an Option grant. Each Option Agreement shall be subject to the terms and conditions of the Plan. 

(z)    “Optionholder” means a person to whom an Option is granted pursuant
to the Plan or, if applicable, such other person who holds an outstanding Option. 

  
 20. 













 (aa)    “Own,”
“Owned,” “Owner,” “Ownership” A person or Entity shall be deemed to “Own,” to have “Owned,” to be the “Owner” of, or to have acquired
“Ownership” of securities if such person or Entity, directly or indirectly, through any contract, arrangement, understanding, relationship or otherwise, has or shares voting power, which includes the power to vote or to direct the voting,
with respect to such securities. 
 (bb)    “Participant” means a person
to whom a Stock Award is granted pursuant to the Plan or, if applicable, such other person who holds an outstanding Stock Award. 

(cc)    “Plan” means this Poseida Therapeutics, Inc. 2015 Equity Incentive
Plan. 
 (dd)    “Restricted Stock Award” means an award of shares of
Common Stock which is granted pursuant to the terms and conditions of Section 6(a). 

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

(ff)    “Restricted Stock Unit Award” means a right to receive shares of
Common Stock which is granted pursuant to the terms and conditions of Section 6(b). 

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

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

 (ii)    “Rule 701” means Rule 701 promulgated under the Securities
Act. 
 (jj)    “Securities Act” means the Securities Act of 1933, as
amended. 
 (kk)    “Stock Appreciation Right” or
“SAR” means a right to receive the appreciation on Common Stock that is granted pursuant to the terms and conditions of Section 5. 

(ll)    “Stock Appreciation Right Agreement” means a written agreement
between the Company and a holder of a Stock Appreciation Right evidencing the terms and conditions of a Stock Appreciation Right grant. Each Stock Appreciation Right Agreement shall be subject to the terms and conditions of the Plan. 

(mm)    “Stock Award” means any right to receive Common Stock granted under
the Plan, including an Incentive Stock Option, a Nonstatutory Stock Option, a Restricted Stock Award, a Restricted Stock Unit Award, or a Stock Appreciation Right. 

(nn)    “Stock Award Agreement” means a written agreement between the
Company and a Participant evidencing the terms and conditions of a Stock Award grant. Each Stock Award Agreement shall be subject to the terms and conditions of the Plan. 

  
 21. 













 (oo)    “Subsidiary”
means, with respect to the Company, (i) any corporation of which more than 50% of the outstanding capital stock having ordinary voting power to elect a majority of the board of directors of such corporation (irrespective of whether, at the
time, stock of any other class or classes of such corporation shall have or might have voting power by reason of the happening of any contingency) is at the time, directly or indirectly, Owned by the Company, and (ii) any partnership, limited
liability company or other entity in which the Company has a direct or indirect interest (whether in the form of voting or participation in profits or capital contribution) of more than 50%. 

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

  
 22. 













 POSEIDA THERAPEUTICS, INC. 

AMENDMENT TO 2015 EQUITY INCENTIVE PLAN 

A.    POSEIDA THERAPEUTICS, INC., a corporation
organized under the laws of the State of Delaware (the “Company”) established the Company’s 2015 Equity Incentive Plan (the “Plan”) by an original instrument adopted by the Company on
February 5, 2015; 
 B.    The Plan currently provides for 545,974 shares of Common
Stock to be reserved for issuance under the Plan; and 
 C.    The Company now wishes to amend
the Plan to increase the number of shares of Common Stock reserved for issuance under the Plan by 3,958,736 shares to an aggregate of 4,504,710 shares and to modify Section 3(a) and Section 3(c) of the Plan. 

NOW THEREFORE, effective immediately, the Plan is amended as follows: 

1.    The reference to “545,974 shares” in each of Section 3(a) and Section 3(c) of
the Plan is amended to reference “4,504,710 shares.” 
 2.    In all other respects the
Plan will remain the same. 
 [SIGNATURE PAGE FOLLOWS] 












 IN WITNESS
WHEREOF, the Company has caused this Amendment to the Plan to be executed this 4th day of May, 2015. 
  

			
	POSEIDA THERAPEUTICS, INC.
		
	By:	 	       /s/ Eric M. Ostertag

		 	 Eric M. Ostertag

		 	 Chief Executive Officer




  

[SIGNATURE PAGE TO POSEIDA THERAPEUTICS, INC. 

AMENDMENT TO 2015 EQUITY INCENTIVE PLAN] 













 POSEIDA THERAPEUTICS, INC. 

AMENDMENT NO. 2 TO 2015 EQUITY INCENTIVE PLAN

 A.    POSEIDA THERAPEUTICS, INC., a
corporation organized under the laws of the State of Delaware (the “Company”), established the Company’s 2015 Equity Incentive Plan (the “Plan”) by an original instrument adopted by the
stockholders of the Company on February 5, 2015; 
 B.    By action of the Company’s
board of directors and approval of the Company’s stockholders as of May 4, 2015, the Company adopted Amendment No. 1 to the Plan to increase the number of shares of the Company’s common stock, par value $0.0001 per share
(“Common Stock”), reserved for issuance under the Plan from 545,974 to 4,504,710 shares; 

C.    The Plan currently provides that 4,504,710 shares of Common Stock are reserved for
issuance under the Plan; and 
 D.    The Company now wishes to amend the Plan to increase the
number of shares of Common Stock reserved for issuance under the Plan by 762,747 shares, to an aggregate of 5,267,457 shares, and to amend Section 3(a) and Section 3(c) of the Plan accordingly. 

NOW THEREFORE, effective immediately, the Plan is amended as follows: 

 

	 	1.	 The reference to “4,504,710 shares” in each of Section 3(a) and Section 3(c) of the Plan
is hereby deleted and shall be replaced with the phrase “5,267,457 shares”. 


  

	 	2.	 Except as expressly amended hereby, in all other respects the Plan will remain the same.



 [SIGNATURE PAGE FOLLOWS] 












 IN WITNESS
WHEREOF, the Company has caused this Amendment No. 2 to the 2015 Equity Incentive Plan to be executed this 15th day of December, 2015. 

 

			
	POSEIDA THERAPEUTICS, INC.
		
	By:	 	         /s/ Nishan de Silva

		 	 Nishan de Silva

		 	 President




  

[SIGNATURE PAGE TO POSEIDA THERAPEUTICS, INC. 

AMENDMENT TO 2015 EQUITY INCENTIVE PLAN] 













 POSEIDA THERAPEUTICS, INC. 

AMENDMENT NO. 3 TO 2015 EQUITY INCENTIVE PLAN

 A.    POSEIDA THERAPEUTICS, INC., a
corporation organized under the laws of the State of Delaware (the “Company”), established the Company’s 2015 Equity Incentive Plan (the “Plan”) by an original instrument adopted by the
stockholders of the Company on February 5, 2015; 
 B.    By action of the Company’s
board of directors and approval of the Company’s stockholders as of May 4, 2015, the Company adopted Amendment No. 1 to the Plan to increase the number of shares of the Company’s common stock, par value $0.0001 per share
(“Common Stock”), reserved for issuance under the Plan from 545,974 to 4,504,710 shares; 

B.    By action of the Company’s board of directors and approval of the Company’s
stockholders as of December 15, 2015, the Company adopted Amendment No. 2 to the Plan to increase the number of shares of the Company’s common stock, par value $0.0001 per share (“Common Stock”), reserved for
issuance under the Plan from 4,504,710 to 5,267,457 shares; 
 C.    The Plan currently provides
that 5,267,457 shares of Common Stock are reserved for issuance under the Plan; and 

D.    The Company now wishes to amend the Plan to increase the number of shares of Common Stock
reserved for issuance under the Plan by 187,253 shares, to an aggregate of 5,454,710 shares, and to amend Section 3(a) and Section 3(c) of the Plan accordingly. 

NOW THEREFORE, effective immediately, the Plan is amended as follows: 

 

	 	1.	 The reference to “5,267,457 shares” in each of Section 3(a) and Section 3(c) of the Plan
is hereby deleted and shall be replaced with the phrase “5,454,710 shares”. 


  

	 	2.	 Except as expressly amended hereby, in all other respects the Plan will remain the same.



 [SIGNATURE PAGE FOLLOWS] 












 IN WITNESS
WHEREOF, the Company has caused this Amendment No. 3 to the 2015 Equity Incentive Plan to be executed this 25th day of May, 2016. 

 

			
	POSEIDA THERAPEUTICS, INC.
		
	 By:
	 	         /s/ Nishan de Silva

		 	 Nishan de Silva

		 	 President




  

[SIGNATURE PAGE TO POSEIDA THERAPEUTICS, INC. 

AMENDMENT TO 2015 EQUITY INCENTIVE PLAN] 













 POSEIDA THERAPEUTICS, INC. 

AMENDMENT NO. 4 TO 2015 EQUITY INCENTIVE PLAN

 A.    POSEIDA THERAPEUTICS, INC., a
corporation organized under the laws of the State of Delaware (the “Company”), established the Company’s 2015 Equity Incentive Plan (the “Plan”) by an original instrument adopted by the
stockholders of the Company on February 5, 2015; 
 B.    By action of the Company’s
board of directors and approval of the Company’s stockholders as of May 4, 2015, the Company adopted Amendment No. 1 to the Plan to increase the number of shares of the Company’s common stock, par value $0.0001 per share
(“Common Stock”), reserved for issuance under the Plan from 545,974 to 4,504,710 shares; 

C.    By action of the Company’s board of directors and approval of the Company’s
stockholders as of December 15, 2015, the Company adopted Amendment No. 2 to the Plan to increase the number of shares of Common Stock, reserved for issuance under the Plan from 4,504,710 to 5,267,457 shares; 

D.    By action of the Company’s board of directors and approval of the Company’s
stockholders as of May 25, 2016, the Company adopted Amendment No. 3 to the Plan to increase the number of shares of Common Stock, reserved for issuance under the Plan from 5,267,457 to 5,454,710 shares; 

E.    The Plan currently provides that 5,454,710 shares of Common Stock are reserved for issuance
under the Plan; and 
 F.    The Company now wishes to amend the Plan to increase the number of
shares of Common Stock reserved for issuance under the Plan by 2,000,000 shares, to an aggregate of 7,454,710 shares, and to amend Section 3(a) and Section 3(c) of the Plan accordingly. 

NOW THEREFORE, effective immediately, the Plan is amended as follows: 

 

	 	1.	 The reference to “5,454,710 shares” in each of Section 3(a) and Section 3(c) of the Plan
is hereby deleted and shall be replaced with the phrase “7,454,710 shares”. 


  

	 	2.	 Except as expressly amended hereby, in all other respects the Plan will remain the same.



 [SIGNATURE PAGE FOLLOWS] 












 IN WITNESS
WHEREOF, the Company has caused this Amendment No. 4 to the 2015 Equity Incentive Plan to be executed October 24, 2018. 

 

			
	POSEIDA THERAPEUTICS, INC.
		
	By:	 	         /s/ Eric Ostertag

		 	         Eric Ostertag

		 	         Chief Executive Officer




  

[SIGNATURE PAGE TO POSEIDA THERAPEUTICS, INC. 

AMENDMENT TO 2015 EQUITY INCENTIVE PLAN] 













 POSEIDA THERAPEUTICS, INC. 

AMENDMENT NO. 5 TO 2015 EQUITY INCENTIVE PLAN 

A.    POSEIDA THERAPEUTICS, INC., a corporation organized under the laws of the State of
Delaware (the “Company”), established the Company’s 2015 Equity Incentive Plan (the “Plan”) by an original instrument adopted by the stockholders of the Company on February 5, 2015; 

B.    By action of the Company’s board of directors and approval of the Company’s
stockholders as of May 4, 2015, the Company adopted Amendment No. 1 to the Plan to increase the number of shares of the Company’s common stock, par value $0.0001 per share (“Common Stock”), reserved for
issuance under the Plan from 545,974 to 4,504,710 shares; 
 C.    By action of the
Company’s board of directors and approval of the Company’s stockholders as of December 15, 2015, the Company adopted Amendment No. 2 to the Plan to increase the number of shares of Common Stock, reserved for issuance under the
Plan from 4,504,710 to 5,267,457 shares; 
 D.    By action of the Company’s board of
directors and approval of the Company’s stockholders as of May 25, 2016, the Company adopted Amendment No. 3 to the Plan to increase the number of shares of Common Stock, reserved for issuance under the Plan from 5,267,457 to
5,454,710 shares; 
 E.    By action of the Company’s board of directors and approval of the
Company’s stockholders as of October 24, 2018, the Company adopted Amendment No. 4 to the Plan to increase the number of shares of Common Stock, reserved for issuance under the Plan from 5,454,710 to 7,454,710 shares; 

F.    The Plan currently provides that 7,454,710 shares of Common Stock are reserved for issuance
under the Plan and that a corresponding number of shares of Common Stock may be issued under the Plan pursuant to the exercise of incentive stock options; and 

G.    The Company now wishes to amend the Plan to increase the number of shares of Common Stock
reserved for issuance under the Plan by 1,000,000 shares, to an aggregate of 8,454,710 shares, and to approve a corresponding increase in the number of shares of Common Stock reserved for issuance under the Plan pursuant to the exercise of incentive
stock options, and to amend Section 3(a) and Section 3(c) of the Plan accordingly. 
 NOW THEREFORE,
effective immediately, the Plan is amended as follows: 
  

	 	1.	 The reference to “7,454,710 shares” in each of Section 3(a) and Section 3(c) of the Plan
is hereby deleted and shall be replaced with the phrase “8,454,710 shares”. 


  

	 	2.	 Except as expressly amended hereby, in all other respects the Plan will remain the same.



 [SIGNATURE PAGE FOLLOWS] 












 IN WITNESS WHEREOF, the Company has caused this Amendment No. 5
to the 2015 Equity Incentive Plan to be executed this 19th day of March 2019. 
  

			
	POSEIDA THERAPEUTICS, INC.
		
	 By:
	 	 /s/ Eric Ostertag

		 	     Eric Ostertag

		 	     Chief Executive Officer



 [SIGNATURE PAGE TO POSEIDA
THERAPEUTICS, INC. 
 AMENDMENT NO. 5 TO 2015 EQUITY
INCENTIVE PLAN] 












 POSEIDA THERAPEUTICS, INC. 

AMENDMENT NO. 6 TO 
 2015
EQUITY INCENTIVE PLAN 
 A.    POSEIDA THERAPEUTICS, INC., a corporation organized under the laws of
the State of Delaware (the “Company”), established the Company’s 2015 Equity Incentive Plan (the “Plan”) by an original instrument adopted by the stockholders of the Company on February 5,
2015; 
 B.    By action of the Company’s board of directors and approval of the Company’s stockholders
as of May 4, 2015, the Company adopted Amendment No. 1 to the Plan to increase the number of shares of the Company’s common stock, par value $0.0001 per share (“Common Stock”), reserved for issuance under the
Plan from 545,974 to 4,504,710 shares; 
 C.    By action of the Company’s board of directors and approval
of the Company’s stockholders as of December 15, 2015, the Company adopted Amendment No. 2 to the Plan to increase the number of shares of Common Stock, reserved for issuance under the Plan from 4,504,710 to 5,267,457 shares; 

D.    By action of the Company’s board of directors and approval of the Company’s stockholders as of
May 25, 2016, the Company adopted Amendment No. 3 to the Plan to increase the number of shares of Common Stock, reserved for issuance under the Plan from 5,267,457 to 5,454,710 shares; 

E.    By action of the Company’s board of directors and approval of the Company’s stockholders as of
October 24, 2018, the Company adopted Amendment No. 4 to the Plan to increase the number of shares of Common Stock, reserved for issuance under the Plan from 5,454,710 to 7,454,710 shares; 

F.    By action of the Company’s board of directors as of March 18, 2019 and approval of the
Company’s stockholders as of March 19, 2019, the Company adopted Amendment No. 5 to the Plan to increase the number of shares of Common Stock, reserved for issuance under the Plan from 7,454,710 to 8,454,710 shares; 

G.    The Plan currently provides that 8,454,710 shares of Common Stock are reserved for issuance under the Plan
and that a corresponding number of shares of Common Stock may be issued under the Plan pursuant to the exercise of incentive stock options; and 

H.    The Company now wishes to amend the Plan to increase the number of shares of Common Stock reserved for
issuance under the Plan by 3,000,000 shares, to an aggregate of 11,454,710 shares, and to approve a corresponding increase in the number of shares of Common Stock reserved for issuance under the Plan pursuant to the exercise of incentive stock
options, and to amend Section 3(a) and Section 3(c) of the Plan accordingly. 
 NOW THEREFORE, effective immediately, the
Plan is amended as follows: 
  

	 	1.	 The reference to “8,454,710 shares” in each of Section 3(a) and Section 3(c) of the Plan is
hereby deleted and shall be replaced with the phrase “11,454,710 shares”. 


  

	 	2.	 Except as expressly amended hereby, in all other respects the Plan will remain the same. 



[SIGNATURE PAGE FOLLOWS] 












 IN WITNESS WHEREOF, the Company has caused this Amendment No. 6 to the 2015
Equity Incentive Plan to be executed this 24th day of June 2020. 
  

			
	POSEIDA THERAPEUTICS, INC.
		
	By:	 	 /s/ Eric Ostertag

		 	Eric Ostertag
		 	Chief Executive Officer


 [SIGNATURE PAGE TO POSEIDA
THERAPEUTICS, INC. 
 AMENDMENT NO. 6 TO 2015 EQUITY
INCENTIVE PLAN] 












 POSEIDA THERAPEUTICS, INC. 

STOCK OPTION GRANT NOTICE 

(POSEIDA THERAPEUTICS, INC. 2015 EQUITY INCENTIVE
PLAN) 
 Poseida Therapeutics, Inc. (the “Company”), pursuant to its Poseida Therapeutics, Inc.
2015 Equity Incentive Plan (the “Plan”), hereby grants to Optionholder an option to purchase the number of shares of the Company’s Common Stock set forth below. This option is subject to all of the terms and conditions
as set forth herein and in the Option Agreement, the Plan, and the Notice of Exercise, all of which are attached hereto and incorporated herein in their entirety. 
  

			
	 Optionholder:
	  	  

	 Date of Grant:
	  	  

	 Vesting Commencement Date:
	  	  

	 Number of Shares Subject to Option:
	  	  

	 Exercise Price (Per Share):
	  	  

	 Total Exercise Price:
	  	  

	 Expiration Date:
	  	  


  

									
	 Type of Grant:
	 	 ☐
	  	 Incentive Stock Option1
	 	 ☐    Nonstatutory Stock Option

				
	 Exercise Schedule:
	 	 ☐
	  	 Same as Vesting Schedule
	 	 ☐    Early Exercise Permitted

		
	 Vesting Schedule:
	 	 [12.5% of the shares subject to the option shall vest on the six-month anniversary of the Vesting
Commencement Date, with the balance vesting in 42 successive monthly installments thereafter, so long as the optionee remains an Advisor, Director or Employee of the Company on each such monthly vesting date.]

		
		 	 Payment:    By one or a combination of the following items (described in the
Option Agreement):
 ☒    Bycash or check

☒    Pursuantto a Regulation T Program if the Shares are
publicly traded
 ☒    Bydelivery of already-owned shares if the
Shares are publicly traded
 ☐    Bydeferred payment

☐    Bynet exercise


 Additional Terms/Acknowledgements: The undersigned Optionholder acknowledges receipt of, and
understands and agrees to, this Stock Option Grant Notice, the Option Agreement and the Plan. Optionholder acknowledges and agrees that this Stock Option Grant Notice and the Option Agreement may not be modified, amended or revised except in a
writing signed by Optionholder and a duly authorized officer of the Company. Optionholder further acknowledges that as of the Date of Grant, this Stock Option Grant Notice, the Option Agreement, and the Plan set forth the entire understanding
between Optionholder and the Company regarding the acquisition of stock in the Company and supersede all prior oral and written agreements, promises and/or representations on that subject with the exception of (i) options previously granted and
delivered to Optionholder under the Plan, and (ii) the following agreements only: 
  

			
	                OTHER AGREEMENTS:	  	  

		  	  


  

	1 	 NTD: If this is an Incentive Stock Option, it (plus other outstanding Incentive Stock Options) cannot be
first exercisable for more than $100,000 in value (measured by exercise price) in any calendar year. Any excess over $100,000 is a Nonstatutory Stock Option. 















			
	    POSEIDA THERAPEUTICS, INC.	  	OPTIONHOLDER:
		
	
    By:                  
                                         
                               
	  	
                       
                                         
                                         
               

	 Signature
	  	Signature
		
	
    Title:                  
                                         
                            
	  	
Date:                      
                                         
                                         
        

		
	
    Date:                  
                                         
                            
	  	

 ATTACHMENTS:  Option Agreement, Poseida Therapeutics, Inc. 2015
Equity Incentive Plan and Notice of Exercise 












 ATTACHMENT I 

OPTION AGREEMENT 












 POSEIDA THERAPEUTICS, INC. 

2015 EQUITY INCENTIVE PLAN 

OPTION AGREEMENT 

(INCENTIVE STOCK OPTION OR NONSTATUTORY STOCK
OPTION) 
 Pursuant to your Stock Option Grant Notice (“Grant Notice”) and this
Option Agreement, Poseida Therapeutics, Inc. (the “Company”) has granted you an option under its 2015 Equity Incentive Plan (the “Plan”) to purchase the number of shares of the Company’s Common
Stock indicated in your Grant Notice at the exercise price indicated in your Grant Notice. Capitalized terms not explicitly defined in this Option Agreement but defined in the Plan shall have the same definitions as in the Plan. 

The details of your option are as follows: 

1.    VESTING. Subject to the limitations contained herein,
your option will vest as provided in your Grant Notice, provided that vesting will cease upon the termination of your Continuous Service in accordance with the terms of the Plan. 

2.    NUMBER OF SHARES AND
EXERCISE PRICE. The number of shares of Common Stock subject to your option and your exercise price per share referenced in your Grant Notice may be adjusted from time to time for Capitalization
Adjustments. 
 3.    EXERCISE RESTRICTION FOR
NON-EXEMPT EMPLOYEES. In the event that you are an Employee eligible for overtime compensation under the Fair Labor Standards Act of 1938, as
amended (i.e., a “Non-Exempt Employee”), and except as otherwise provided in the Plan, you may not exercise your option until you have completed at least six months of Continuous
Service measured from the date of grant specified in your Grant Notice (the “Date of Grant”), notwithstanding any other provision of your option. Notwithstanding the foregoing, consistent with the provisions of the Worker
Economic Opportunity Act, (i) in the event of your death or disability, (ii) upon a Corporate Transaction in which your option is not assumed, continued or substituted or (iii) upon a Change in Control in which the vesting of your
option accelerates, you may exercise the vested portion of your option earlier than six months following the Date of Grant. 

4.    EXERCISE PRIOR TO VESTING
(“EARLY EXERCISE”). If permitted in your Grant Notice (i.e., the “Exercise Schedule” indicates “Early Exercise Permitted”) and subject to the provisions of your option, you may elect at
any time that is both (i) during the period of your Continuous Service and (ii) during the term of your option, to exercise all or part of your option, including the unvested portion of your option; provided, however, that:

 (a)    a partial exercise of your option shall be deemed to cover first vested shares of Common
Stock and then the earliest vesting installment of unvested shares of Common Stock; 

  
 1. 













 (b)    any shares of Common Stock so purchased
from installments that have not vested as of the date of exercise shall be subject to the purchase option in favor of the Company as described in the Company’s form of Early Exercise Stock Purchase Agreement; 

(c)    you shall enter into the Company’s form of Early Exercise Stock Purchase Agreement with
a vesting schedule that will result in the same vesting as if no early exercise had occurred; and 

(d)    if your option is an Incentive Stock Option, then, to the extent that the aggregate Fair
Market Value (determined at the time of grant) of the shares of Common Stock with respect to which your option plus all other Incentive Stock Options you hold are exercisable for the first time by you during any calendar year (under all plans of the
Company and its Affiliates) exceeds $100,000, your option(s) or portions thereof that exceed such limit (according to the order in which they were granted) shall be treated as Nonstatutory Stock Options. 

5.    METHOD OF PAYMENT. Payment
of the exercise price is due in full upon exercise of all or any part of your option. You may elect to make payment of the exercise price in cash or by check or in any other manner permitted by your Grant Notice, which may include one
or more of the following: 
 (a)    Provided that at the time of exercise the Common Stock is
publicly traded, and to the extent permitted by law, pursuant to a program developed under Regulation T as promulgated by the Federal Reserve Board that, prior to the issuance of Common Stock, results in either the receipt of cash (or check) by the
Company or the receipt of irrevocable instructions to pay the aggregate exercise price to the Company from the sales proceeds. 

(b)    Provided that at the time of exercise the Common Stock is publicly traded, by delivery to
the Company (either by actual delivery or attestation) of already-owned shares of Common Stock that are owned free and clear of any liens, claims, encumbrances or security interests, and that are valued at Fair Market Value on the date of exercise.
“Delivery” for these purposes, in the sole discretion of the Company at the time you exercise your option, shall include delivery to the Company of your attestation of ownership of such shares of Common Stock in a form approved by the
Company. Notwithstanding the foregoing, you may not exercise your option by tender to the Company of Common Stock to the extent such tender would violate the provisions of any law, regulation or agreement restricting the redemption of the
Company’s stock. 
 (c)    Pursuant to the following deferred payment alternative: 

(i)    Not less than 100% of the aggregate exercise price, plus accrued interest, shall be due four
years from date of exercise or, at the Company’s election, upon termination of your Continuous Service. 

(ii)    Interest shall be compounded at least annually and shall be charged at the minimum rate of
interest necessary to avoid (1) the treatment as interest, under any applicable provisions of the Code, of any amounts other than amounts stated to be interest under the deferred payment arrangement and (2) the classification of your
option as a liability for financial accounting purposes. 

  
 2. 













 (iii)    To elect the deferred payment
alternative, you must, as a part of your written notice of exercise, give notice of the election of this payment alternative and, in order to secure the payment of the deferred exercise price to the Company hereunder, if the Company so requests, you
must tender to the Company a promissory note and a pledge agreement covering the purchased shares of Common Stock, both in form and substance satisfactory to the Company, or such other or additional documentation as the Company may request. 

(d)    If the option is a Nonstatutory Stock Option, by a “net exercise” arrangement
pursuant to which the Company will reduce the number of shares of Common Stock issued upon exercise of your option by the largest whole number of shares with a Fair Market Value that does not exceed the aggregate exercise price; provided,
however, that the Company shall accept a cash or other payment from you to the extent of any remaining balance of the aggregate exercise price not satisfied by such reduction in the number of whole shares to be issued; provided
further, that shares of Common Stock will no longer be outstanding under your option and will not be exercisable thereafter to the extent that (1) shares are used to pay the exercise price pursuant to the “net exercise,” (2)
shares are delivered to you as a result of such exercise, and (3) shares are withheld to satisfy tax withholding obligations. 

(e)    in any other form of legal consideration that may be acceptable to the Board. 

6.    WHOLE SHARES. You may exercise your
option only for whole shares of Common Stock. 
 7.    SECURITIES
LAW COMPLIANCE. Notwithstanding anything to the contrary contained herein, you may not exercise your option unless the shares of Common Stock issuable upon such exercise are then registered under the
Securities Act or, if such shares of Common Stock are not then so registered, the Company has determined that such exercise and issuance would be exempt from the registration requirements of the Securities Act. The exercise of your option also must
comply with other applicable laws and regulations governing your option, and you may not exercise your option if the Company determines that such exercise would not be in material compliance with such laws and regulations. 

8.    TERM. You may not exercise your option before the
commencement or after the expiration of its term. The term of your option commences on the Date of Grant and expires, subject to the provisions of Section 5(h) of the Plan, upon the earliest of the following: 

(a)    immediately upon the termination of your Continuous Service for Cause; 

(b)    three months after the termination of your Continuous Service for any reason other than
Cause or your Disability or death, provided that if during any part of such three month period you may not exercise your option solely because of the condition set forth in Section 7 relating to “Securities Law Compliance,” your
option shall not expire until the earlier of the Expiration Date or until it shall have been exercisable for an aggregate period of three months after the termination of your Continuous Service; and if (i) you are a Non-Exempt Employee, (ii) your Continuous Service terminates within six months after the Date of Grant, 

  
 3. 













 
and (iii) you have vested in a portion of your option at the time of your termination of Continuous Service, your option shall not expire until the earlier of (x) the later of
(A) the date that is seven months after the Date of Grant or (B) the date that is three months after the termination of your Continuous Service, or (y) the Expiration Date; 

(c)    twelve months after the termination of your Continuous Service due to your Disability; 

(d)    eighteen months after your death if you die during your Continuous Service; 

(e)    the Expiration Date indicated in your Grant Notice; or 

(f)    the day before the tenth anniversary of the Date of Grant. 

Notwithstanding the foregoing, if you die during the period provided in Section 8(b) or 8(c) above, the term of your
option shall not expire until the earlier of 18 months after your death, the Expiration Date indicated in your Grant Notice, or the day before the tenth anniversary of the Date of Grant. 

If your option is an Incentive Stock Option, note that to obtain the federal income tax advantages associated with an
Incentive Stock Option, the Code requires that at all times beginning on the date of grant of your option and ending on the day three months before the date of your option’s exercise, you must be an employee of the Company or an Affiliate,
except in the event of your death or Disability. The Company has provided for extended exercisability of your option under certain circumstances for your benefit but cannot guarantee that your option will necessarily be treated as an Incentive Stock
Option if you continue to provide services to the Company or an Affiliate as a Consultant or Director after your employment terminates or if you otherwise exercise your option more than three months after the date your employment with the Company or
an Affiliate terminates. 
 9.    EXERCISE. 

(a)    You may exercise the vested portion of your option (and the unvested portion of your option
if your Grant Notice so permits) during its term by delivering a Notice of Exercise (in a form designated by the Company at the time of exercise) together with the exercise price to the Secretary of the Company, or to such other person as the
Company may designate, during regular business hours, together with such additional documents as the Company may then require. 

(b)    By exercising your option you agree that, as a condition to any exercise of your option, the
Company may require you to enter into an arrangement providing for the payment by you to the Company of any tax withholding obligation of the Company arising by reason of (1) the exercise of your option, (2) the lapse of any substantial
risk of forfeiture to which the shares of Common Stock are subject at the time of exercise, or (3) the disposition of shares of Common Stock acquired upon such exercise. 

  
 4. 













 (c)    If your option is an Incentive Stock
Option, by exercising your option you agree that you will notify the Company in writing within 15 days after the date of any disposition of any of the shares of the Common Stock issued upon exercise of your option that occurs within two years after
the date of your option grant or within one year after such shares of Common Stock are transferred upon exercise of your option. 

(d)    By exercising your option you agree that you shall not sell, dispose of, transfer, make any
short sale of, grant any option for the purchase of, or enter into any hedging or similar transaction with the same economic effect as a sale, any shares of Common Stock or other securities of the Company held by you, for a period of 180 days
following the effective date of a registration statement of the Company filed under the Securities Act or such longer period as necessary to permit compliance with FINRA Rule 2711 or NYSE Member Rule 472 and similar rules and regulations (the
“Lock-Up Period”); provided, however, that nothing contained in this Section 9(d) shall prevent the exercise of a repurchase option, if any, in favor of the Company
during the Lock-Up Period. You further agree to execute and deliver such other agreements as may be reasonably requested by the Company and/or the underwriters that are consistent with the foregoing or that
are necessary to give further effect thereto. To enforce the foregoing covenant, the Company may impose stop-transfer instructions with respect to your shares of Common Stock until the end of such period. The underwriters of the Company’s stock
are intended third party beneficiaries of this Section 9(d) and shall have the right, power and authority to enforce the provisions hereof as though they were a party hereto. 

(e)    As a condition to your exercise of your option and to the Company’s issuance and
delivery of the shares of Common Stock issuable upon such exercise, the Company may require that you execute certain customary agreements entered into with the holders of capital stock of the Company, such as a right of first refusal and co-sale agreement, stockholders’ agreement and a voting agreement. 

10.    TRANSFERABILITY. Except as otherwise provided in this
Section 10, your option is not transferable except by will or by the laws of descent and distribution and is exercisable during your lifetime only by you; provided, however, that the Board may, in its sole discretion, permit you
to transfer your option to such extent as permitted by Rule 701, if applicable at the time of the grant of the option and in a manner consistent with applicable tax and securities laws upon your request. Additionally, if your option is an Incentive
Stock Option, the Board may permit you to transfer your option only to the extent permitted by Sections 421, 422 and 424 of the Code and the regulations and other guidance thereunder. 

(a)    Domestic Relations Orders. Upon receiving written permission from the Board or its
duly authorized designee, and provided that you and the designated transferee enter into transfer and other agreements required by the Company, you may transfer your option pursuant to a domestic relations order that contains the information
required by the Company to effectuate the transfer. You are encouraged to discuss the proposed terms of any division of this option with the Company prior to finalizing the domestic relations order to help ensure the required
information is contained within the domestic relations order. If this option is an Incentive Stock Option, this option may be deemed to be a Nonstatutory Stock Option as a result of such transfer. 

  
 5. 













 (b)    Beneficiary Designation. Upon
receiving written permission from the Board or its duly authorized designee, you may, by delivering written notice to the Company, in a form provided by or otherwise satisfactory to the Company, designate a third party who, in the event of your
death, shall thereafter be entitled to exercise your option and receive the Common Stock or other consideration resulting from such exercise. In the absence of such a designation, the executor or administrator of your estate shall be entitled to
exercise this option and receive, on behalf of your estate, the Common Stock or other consideration resulting from such exercise. 

11.    RIGHT OF FIRST
REFUSAL. Shares of Common Stock that you acquire upon exercise of your option will be subject to the right of first refusal described below. The Company’s right of first refusal will expire upon the initial
public offering of the Company’s common stock pursuant to a registration statement filed with and declared effective by the Securities and Exchange Commission or any foreign regulatory agency under the Securities Act or any foreign securities
laws (the “Listing Date”). 
 (a)    Prior to the Listing Date, you may
not validly Transfer (as defined below) any shares of stock acquired upon exercise of your option, or any interest in such snares, unless such Transfer is made in compliance with the following provisions: 

(i)    Before there can be a valid Transfer of any shares or any interest therein, the record
holder of the shares to be transferred (the “Offered Shares”) will give written notice (by registered or certified mail) to the Company. Such notice will specify the identity of the proposed transferee, the cash price offered
for the Offered Shares by the proposed transferee (or, if the proposed Transfer is one in which the holder will not receive cash, such as an involuntary transfer, gift, donation or pledge, the holder will state that no purchase price is being
proposed), and the other terms and conditions of the proposed Transfer. The date such notice is mailed will be hereinafter referred to as the “Notice Date” and the record holder of the Offered Shares will be hereinafter
referred to as the “Offeror.” If, from time to time, there is any stock dividend, stock split or other change in the character or amount of any of the outstanding stock of the corporation the stock of which is subject to the
provisions of your option, then in such event any and all new, substituted or additional securities to which you are entitled by reason of your ownership of the shares acquired upon exercise of your option will be immediately subject to the
Company’s Right of First Refusal (as defined below) with the same force and effect as the shares subject to the Right of First Refusal immediately before such event. 

(ii)    For a period of 30 calendar days after the Notice Date; or such longer period as may be
required to avoid the classification of your option as a liability for financial accounting purposes, the Company will have the option to purchase all (but not less than all) of the Offered Shares at the purchase price and on the terms set forth in
Section 11(a)(iii) (the Company’s “Right of First Refusal”). In the event that the proposed Transfer is one involving no payment of a purchase price, the purchase price will be deemed to be the Fair Market Value of
the Offered Shares as determined in good faith by the Board in its discretion. The Company may exercise its Right of First Refusal by mailing (by registered or certified mail) written notice of exercise of its Right of First Refusal to the Offeror
prior to the end of said 30-days (including any extension required to avoid classification of the option as a liability for financial accounting purposes). 

  
 6. 













 (iii)    The price at which the Company may
purchase the Offered Shares pursuant to the exercise of its Right of First Refusal will be the cash price offered for the Offered Shares by the proposed transferee (as set forth in the notice required under Section 11(a)(i)), or the Fair Market
Value as determined by the Board in the event no purchase price is involved. To the extent consideration other than cash is offered by the proposed transferee, the Company will not be required to pay any additional amounts to the Offeror other than
the cash price offered (or the Fair Market Value, if applicable). The Company’s notice of exercise of its Right of First Refusal will be accompanied by full payment for the Offered Shares and, upon such payment by the Company, the Company will
acquire full right, title and interest to all of the Offered Shares. 
 (iv)    If, and only if,
the option given pursuant to Section 11(a)(ii) is not exercised, the Transfer proposed in the notice given pursuant to Section 11(a)(i) may take place; provided, however, that such Transfer must, in all respects, be exactly
as proposed in said notice except that such Transfer may not take place either before the tenth calendar day after the expiration of the 30-day option exercise period or after the 90th calendar day after the
expiration of the 30-day option exercise period, and if such Transfer has not taken place prior to said 90th day, such Transfer may not take place without once again complying with this Section 11(a). The
option exercise periods in this Section 11(a)(iv) will be adjusted to include any extension required to avoid the classification of your option as a liability for financial accounting purposes. 

(b)    As used in this Section 11 and in Section 12 below, the term
“Transfer” means any sale, encumbrance, pledge, gift or other form of disposition or transfer of shares of the Company’s stock or any legal or equitable interest therein; provided, however, that the term
Transfer does not include a transfer of such shares or interests by will or by the applicable laws of descent and distribution. 

(c)    None of the shares of the Company’s stock purchased on exercise of your option will be
transferred on the Company’s books nor will the Company recognize any such Transfer of any such shares or any interest therein unless and until all applicable provisions of this Section 11 have been complied with in all respects. The
certificates of stock evidencing shares of stock purchased on exercise of your option will bear an appropriate legend referring to the transfer restrictions imposed by this Section 11. 

(d)    To ensure that the shares subject to the Company’s Right of First Refusal will be
available for repurchase by the Company, the Company may require you to deposit the certificates evidencing the shares that you purchase upon exercise of your option with an escrow agent designated by the Company under the terms and conditions of an
escrow agreement approved by the Company. If the Company does not require such deposit as a condition of exercise of your option, the Company reserves the right at any time to require you to so deposit the certificates in escrow. As soon as
practicable after the expiration of the Company’s Right of First Refusal, the agent will deliver to you the shares and any other property no-longer subject to such restriction. In the event the shares and
any other property held in escrow are subject to the Company’s exercise of its Right of First Refusal, the notices required to be given to you will be given to the escrow agent, and any payment required to be given to you will be given to the
escrow agent. Within 30 days after payment by the Company for the Offered Shares, the escrow agent will deliver the Offered Shares that the Company has repurchased to the Company and will deliver the payment received from the Company to you. 

  
 7. 













 12.    RIGHT OF
REPURCHASE. 
 (a)    Subject to the “Repurchase Limitation” in
Section 8(1) of the Plan, the Company will have a Repurchase Right (as defined below), prior to the Listing Date, as to all or any part of the shares received pursuant to the exercise of your option on the terms and conditions below. 

(b)    The Company may elect (but is not obligated) to repurchase all or any part of the shares
that you acquired upon exercise of your option (the Company’s “Repurchase Right”). If, from time to time, there is any stock dividend, stock split or other change in the character or amount of any of the outstanding
stock of the Company the stock of which is subject to the provisions of your option, then in such event any and all new, substituted or additional securities to which you are entitled by reason of your ownership of the shares acquired upon exercise
of your option will be immediately subject to this Repurchase Right with the same force and effect as the shares subject to the Company’s Repurchase Right immediately before such event. 

(c)    The Company’s Repurchase Right will be exercisable only within the 90 day period
following a Repurchase Event (or such longer period as may be required to avoid classification of the option as a liability for financial accounting purposes), or such longer period as may be agreed to by the Company and you (the
“Repurchase Period”). Each of the following events will constitute a “Repurchase Event”: 

(i)    Termination of your Continuous Service for any reason or no reason, with or without cause,
including death or Disability, in which event the Repurchase Period will commence on the date of termination of your Continuous Service (or in the case of a post-termination exercise of your option, the date of such exercise). 

(ii)    You, your legal representative, or other holder of shares of Common Stock acquired upon
exercise of your option attempts to Transfer (as defined in Section 11 above) any of the shares without compliance with the right of first refusal provisions contained in Section 11 above, in which event the Repurchase Period will commence
on the date the Company receives actual notice of such attempted Transfer. 
 (iii)    The
receivership, bankruptcy, or other creditor’s proceeding regarding you or the taking of any of the shares by legal process, such as a levy of execution, in which event the Repurchase Period will commence on the date the Company receives actual
notice of the commencement of pendency of the receivership, bankruptcy or other creditor’s proceeding or the date of such taking, as the case may be, and the Fair Market Value of the shares will be determined as of the last day of the month
preceding the month in which the proceeding involved commenced or the taking occurred. 

(d)    The Company will not exercise its Repurchase Right for less than all of the shares without
your consent, will exercise its Repurchase Right only for cash or cancellation of purchase money indebtedness for the shares of Common Stock and will give you written notice (by registered or certified mail) accompanied by payment for the shares of
Common Stock within 90 calendar days after the Repurchase Event or, if later, 90 calendar days after a proper 

  
 8. 













 
purchase of shares following such Repurchase Event (i.e., upon exercise of the option), including after any extension of the Repurchase Period for financial accounting purposes. 

(e)    The repurchase price will be equal to the shares’ Fair Market Value on the date of
repurchase. 
 (f)    To ensure that the shares subject to the Company’s Repurchase Right
will be available for repurchase by the Company, the Company may require you to deposit the certificates evidencing the shares that you purchase upon exercise of your option with an escrow agent designated by the Company under the terms and
conditions of an escrow agreement approved by the Company. If the Company does not require such deposit as a condition of exercise of your option, the Company reserves the right at any time to require you to so deposit the certificates in escrow. As
soon as practicable after the expiration of the Company’s Repurchase Right, the agent will deliver to you the shares of Common Stock and any other property no longer subject to such restriction. In the event the shares and any other property
held in escrow are subject to the Company’s exercise of its Repurchase Right, the notices required to be given to you will be given to the escrow agent, and any payment required to be given to you will be given to the escrow agent. Within 30
days after payment by the Company for the shares, the escrow agent will deliver the shares of Common Stock that the Company has purchased to the Company and will deliver the payment received from the Company to you. 

13.    OPTION NOT A SERVICE
CONTRACT. Your option is not an employment or service contract, and nothing in your option shall be deemed to create in any way whatsoever any obligation on your part to continue in the employ of the Company or an
Affiliate, or of the Company or an Affiliate to continue your employment. In addition, nothing in your option shall obligate the Company or an Affiliate, their respective stockholders, Boards of Directors, Officers or Employees to continue any
relationship that you might have as a Director or Consultant for the Company or an Affiliate. 

14.    WITHHOLDING OBLIGATIONS. 

(a)    At the time you exercise your option, in whole or in part, or at any time thereafter as
requested by the Company, you hereby authorize withholding from payroll and any other amounts payable to you, and otherwise agree to make adequate provision for (including by means of a “cashless exercise” pursuant to a program developed
under Regulation T as promulgated by the Federal Reserve Board to the extent permitted by the Company), any sums required to satisfy the federal, state, local and foreign tax withholding obligations of the Company or an Affiliate, if any, which
arise in connection with the exercise of your option. 
 (b)    Upon your request and subject to
approval by the Company, in its sole discretion, and compliance with any applicable legal conditions or restrictions, the Company may withhold from fully vested shares of Common Stock otherwise issuable to you upon the exercise of your option a
number of whole shares of Common Stock having a Fair Market Value, determined by the Company as of the date of exercise, not in excess of the minimum amount of tax required to be withheld by law (or such lower amount as may be necessary to avoid
classification of your option as a liability for financial accounting purposes). If the date of determination of any tax withholding obligation is deferred to a date later than the date of 

  
 9. 













 
exercise of your option, share withholding pursuant to the preceding sentence shall not be permitted unless you make a proper and timely election under Section 83(b) of the Code, covering
the aggregate number of shares of Common Stock- acquired upon such exercise with respect to which such determination is otherwise deferred, to accelerate the determination of such tax withholding obligation to the date of exercise of your option.
Notwithstanding the filing of such election, shares of Common Stock shall be withheld solely from fully vested shares of Common Stock determined as of the date of exercise of your option that are otherwise issuable to you upon such exercise. Any
adverse consequences to you arising in connection with such share withholding procedure shall be your sole responsibility. 

(c)    You may not exercise your option unless the tax withholding obligations of the Company
and/or any Affiliate are satisfied. Accordingly, you may not be able to exercise your option when desired even though your option is vested, and the Company shall have no obligation to• issue a certificate for such shares of Common Stock or
release such shares of Common Stock from any escrow provided for herein unless such obligations are satisfied. 

15.    TAX CONSEQUENCES. You hereby agree that
the Company does not have a duty to design or administer the Plan or its other compensation programs in a manner that minimizes your tax liabilities. You shall not make any claim against the Company, or any of its Officers, Directors, Employees or
Affiliates related to tax liabilities arising from your option or your other compensation. In particular, you acknowledge that this option is exempt from Section 409A of the Code only if the exercise price per share specified in the Grant
Notice is at least equal to the “fair market value” per share of the Common Stock on the Date of Grant and there is no other impermissible deferral of compensation associated with the option. While the Common Stock is not traded on an
established securities market, the Fair Market Value is determined by the Board, perhaps in consultation with an independent valuation firm retained by the Company. You acknowledge that there is no guarantee that the Internal Revenue Service will
agree with the valuation as determined by the Board, and you shall not make any claim against the Company, or any of its Officers, Directors, Employees or Affiliates in the event that the Internal Revenue Service asserts that the valuation
determined by the Board is less than the “fair market value” as subsequently determined by the Internal Revenue Service. 

16.    NOTICES. Any notices provided for in your option or the
Plan shall be given in writing and shall be deemed effectively given upon receipt or, in the case of notices delivered by mail by the Company to you, five days after deposit in the United States mail, postage prepaid, addressed to you at the last
address you provided to the Company. 
 17.    GOVERNING PLAN
DOCUMENT. Your option is subject to all the provisions of the Plan, the provisions of which are hereby made a part of your option, and is further subject to all interpretations, amendments, rules and regulations,
which may from time to time be promulgated and adopted pursuant to the Plan. In the event of any conflict between the provisions of your option and those of the Plan, the provisions of the Plan shall control. 

  
 10. 













 ATTACHMENT II 

POSEIDA THERAPEUTICS, INC. 2015 EQUITY INCENTIVE
PLAN 












 ATTACHMENT III 

NOTICE OF EXERCISE 












 NOTICE OF EXERCISE 

POSEIDA THERAPEUTICS, INC. 2015 EQUITY INCENTIVE
PLAN 
 Poseida Therapeutics, Inc. 

4242 Campus Point Court, Suite 700 

San Diego, California 92121 

Attention: Finance 

Date of Exercise:                  

Ladies and Gentlemen: 

This constitutes notice under my option that I elect to purchase the number of shares of Common Stock of Poseida Therapeutics, Inc. (the
“Company”) for the price set forth below. 
  

					
	 Type of option (check one):
	  	Incentive ☐	  	Nonstatutory ☐
	 Option dated:
	  	  
	  	
	 Number of shares as
to which option is
exercised:
	  	  
	  	
	 Shares to be
issued in name of:
	  	  
	  	
	 Total exercise price:
	  	$                                     
	  	
	 Cash payment delivered herewith:
	  	$                                     
	  	


 By this exercise, I agree (i) to provide such additional documents as you may require pursuant to
the terms of the Poseida Therapeutics, Inc. 2015 Equity Incentive Plan, (ii) to provide for the payment by me to you (in the manner designated by you) of your withholding .obligation, if any, relating to the exercise of the option, and
(iii) if this exercise relates to an incentive stock option, to notify you in writing within 15 days after the date of any disposition of any of the shares of Common Stock issued upon exercise of the option that occurs within two years after
the date of grant of the option or within one year after such shares of Common Stock are issued upon exercise of the option. 
 If at the
time of exercise of the option the Common Stock of the Company is not publicly traded, I hereby make the following certifications and representations with respect to the number of shares of Common Stock of the Company listed above (the
“Shares”), which are being acquired by me for my own account upon exercise of the option as set forth above: 
 I
acknowledge that the Shares have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), and are deemed to constitute “restricted securities” under Rule 701 and Rule 144 promulgated
under the Securities Act. I warrant and represent to the Company that I have no present intention of distributing or selling said Shares, except as permitted under the Securities Act and any applicable state securities laws. 

I further acknowledge that I will not be able to resell the Shares for at least 90 days after













 
the stock of the Company becomes publicly traded (i.e., subject to the reporting requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended) under Rule 701
and that more restrictive conditions apply to affiliates of the Company under Rule 144. 
 I further acknowledge that all certificates
representing any of the Shares subject to the provisions of the option shall have endorsed thereon appropriate legends reflecting the foregoing limitations, as well as any legends reflecting restrictions pursuant to the Option Agreement, the
Company’s Articles of Incorporation, Bylaws and/or applicable securities laws. 
 I further agree that, if required by the Company (or
a representative of the underwriters) in connection with the first underwritten registration of the offering of any securities of the Company under the Securities Act, I will not sell, dispose of, transfer, make any short sale of, grant any option
for the purchase of, or enter into any hedging or similar transaction with the same economic effect as a sale, any shares of Common Stock or other securities of the Company for a period of 180 days following the effective date of a registration
statement of the Company filed under the Securities Act or such longer period as necessary to permit compliance with NASD Rule 2711 or NYSE Member Rule 472 and similar rules and regulations (the
“Lock-Up Period”). I further agree to execute and deliver such other agreements as may be reasonably requested by the Company and/or the underwriters that are consistent with the
foregoing or that are necessary to give further effect thereto. To enforce the foregoing covenant, the Company may impose stop-transfer instructions with respect to securities subject to the foregoing restrictions until the end of such period. 

 

			
	Very truly yours,
	
	  

		
	 Address: