Document:

EX-10.2

 Exhibit 10.2 

CULLINAN MANAGEMENT, INC. 

2021 EMPLOYEE STOCK PURCHASE PLAN 

The purpose of the Cullinan Management, Inc. 2021 Employee Stock Purchase Plan (the “Plan”) is to provide eligible employees of
Cullinan Management, Inc. (the “Company”) and each Designated Company (as defined in Section 11) with opportunities to purchase shares of the Company’s common stock, par value $0.0001 per share (the “Common Stock”).
416,665 shares of Common Stock in the aggregate have been approved and reserved for this purpose, plus on January 1, 2022 and each January 1 thereafter until the Plan terminates pursuant to Section 20, the number of shares of Common
Stock reserved and available for issuance under the Plan shall be cumulatively increased by the lesser of (i) 833,330 shares of Common Stock, (ii) one percent (1%) of the number of shares of Common Stock issued and outstanding on the
immediately preceding December 31, or (iii) such lesser number of shares of Common Stock as determined by the Administrator (as defined in Section 1). 

The Plan includes two components: a Code Section 423 Component (the “423 Component”) and a
non-Code Section 423 Component (the “Non-423 Component”). It is intended for the 423 Component to constitute an “employee stock purchase plan”
within the meaning of Section 423(b) of the Internal Revenue Code of 1986, as amended (the “Code”), and the 423 Component shall be interpreted in accordance with that intent. Under the Non-423
Component, which does not qualify as an “employee stock purchase plan” within the meaning of Section 423(b) of the Code, options will be granted pursuant to rules, procedures or sub-plans
adopted by the Administrator designed to comply with applicable laws or achieve tax and other objectives. Except as otherwise provided herein or by the Administrator, the Non-423 Component will operate and be
administered in the same manner as the 423 Component. 

 Unless otherwise defined herein, capitalized terms in this Plan shall have the meaning
ascribed to them in Section 11. 
 1.    Administration. The Plan will be administered by the person or
persons (the “Administrator”) appointed by the Company’s Board of Directors (the “Board”) for such purpose. The Administrator has authority at any time to: (i) adopt, alter and repeal such rules, guidelines and
practices for the administration of the Plan and for its own acts and proceedings as it shall deem advisable; (ii) interpret the terms and provisions of the Plan; (iii) make all determinations it deems advisable for the administration of
the Plan, including to accommodate the specific requirements of applicable laws, regulations and procedures in jurisdictions outside the United States; (iv) decide all disputes arising in connection with the Plan; and (v) otherwise
supervise the administration of the Plan. All interpretations and decisions of the Administrator shall be binding on all persons, including the Company and the Participants. No member of the Board or individual exercising administrative authority
with respect to the Plan shall be liable for any action or determination made in good faith with respect to the Plan or any option granted hereunder. 

2.    Offerings. The Company may make one or more offerings to eligible employees to purchase Common Stock under
the Plan (“Offerings”). Unless otherwise determined by the Administrator, the initial Offering will begin on the Registration Date and will end on the following June 30 (the “Initial Offering”). Thereafter, unless otherwise
determined by the Administrator, an Offering will begin on the first business day occurring on or after each July 1 and January 1 and will end on the last business day occurring on or before December 31 or June 30, respectively.
The Administrator may, in its discretion, designate a different period for any Offering, provided that no Offering shall exceed 27 months in duration. 

  
 2 

 3.    Eligibility. Except as otherwise determined by the
Administrator in advance of an Offering, all individuals classified as employees on the payroll records of the Company and each Designated Company are eligible to participate in any one or more of the Offerings under the Plan. The Administrator may
further determine, in advance of an Offering, that employees are eligible only if, as of the first day of the applicable Offering (the “Offering Date”), they are customarily employed by the Company or a Designated Company for more than 20
hours a week and have completed at least 30 days of employment (or such other period of time as determined by the Administrator in advance of an Offering, such period not to exceed two years), provided, however, that employees who are employed for
20 hours or less a week may be eligible to participate in the Plan if required by applicable law or regulations. Notwithstanding any other provision herein, individuals who are not contemporaneously classified as employees of the Company or a
Designated Company for purposes of the Company’s or applicable Designated Company’s payroll system are not considered to be eligible employees of the Company or any Designated Company and shall not be eligible to participate in the Plan.
In the event any such individuals are reclassified as employees of the Company or a Designated Company for any purpose, including, without limitation, common law or statutory employees, by any action of any third party, including, without
limitation, any government agency, or as a result of any private lawsuit, action or administrative proceeding, such individuals shall, notwithstanding such reclassification, remain ineligible for participation. Notwithstanding the foregoing, the
exclusive means for individuals who are not contemporaneously classified as employees of the Company or a Designated Company on the Company’s or Designated Company’s payroll system to become eligible to participate in this Plan is through
an amendment to this Plan, duly executed by the Company, which specifically renders such individuals eligible to participate herein. 

  
 3 

 4.    Participation. 

(a)    Participants on Registration Date. All individuals classified as employees on the payroll records of the
Company and each Designated Company as of the Registration Date shall be deemed to be a Participant at such time. If an eligible employee is deemed to be a Participant pursuant to this Section 4(a), such individual shall be deemed not to have
authorized payroll deductions and shall not purchase any Common Stock hereunder unless he or she thereafter authorizes payroll deductions by submitting an enrollment form (in the manner described in Section 4(c)) within 60 days of the
commencement of the Initial Offering. If such a Participant does not authorize payroll deductions by submitting an enrollment form within 60 days of the commencement of the Initial Offering, that Participant will be deemed to have withdrawn from the
Plan. 
 (b)    Participants in Offerings. An eligible employee who is not a Participant in any prior Offering
may participate in a subsequent Offering by submitting an enrollment form to the Company or an agent designated by the Company (in the manner described in Section 4(c)) at least 15 business days before the Offering Date (or by such other
deadline as shall be established by the Administrator for the Offering). 
 (c)    Enrollment. The enrollment
form (which may be in an electronic format or such other method as determined by the Company in accordance with the Company’s practices) will (a) state a whole percentage or the amount to be deducted from an eligible employee’s
Compensation (as defined in Section 11) per pay period, (b) authorize the purchase of Common Stock in each Offering in accordance with the terms of the Plan and (c) specify the exact name or names in which shares of Common Stock
purchased for such individual are to be issued pursuant to Section 10. An employee who does not enroll in accordance with these procedures will be 

  
 4 

 
deemed to have waived the right to participate. Unless a Participant files a new enrollment form or withdraws from the Plan, such Participant’s deductions and purchases will continue at the
same percentage or amount of Compensation for future Offerings, provided he or she remains eligible. 

(d)    Notwithstanding the foregoing, participation in the Plan will neither be permitted nor be denied contrary to the
requirements of the Code. 
 5.    Employee Contributions. Each eligible employee may authorize payroll
deductions at a minimum of 1 percent up to a maximum of 15 percent of such employee’s Compensation for each pay period or such other minimum or maximum as may be specified by the
Administrator in advance of an Offering. The Company will maintain book accounts showing the amount of payroll deductions made by each Participant for each Offering. No interest will accrue or be paid on payroll deductions, except as may be required
by applicable law. If payroll deductions for purposes of the Plan are prohibited or otherwise problematic under applicable law (as determined by the Administrator in its discretion), the Administrator may require Participants to contribute to the
Plan by such other means as determined by the Administrator. Any reference to “payroll deductions” in this Section 5 (or in any other section of the Plan) will similarly cover contributions by other means made pursuant to this
Section 5. 
 6.    Deduction Changes. Except in the event of a Participant increasing his or her payroll
deduction from 0 percent during the Initial Offering as specified in Section 4(a) or as may otherwise be determined by the Administrator in advance of an Offering, a Participant may not increase or decrease his or her payroll deduction
during any Offering, but may increase or decrease his or her payroll deduction with respect to the next Offering (subject to the limitations of Section 5) by filing a new enrollment form at least 15 business days before the next Offering Date
(or by such other deadline as shall be established by the Administrator for the Offering). The Administrator may, in advance of any Offering, establish rules permitting a Participant to increase, decrease or terminate his or her payroll deduction
during an Offering. 

  
 5 

 7.    Withdrawal. A Participant may withdraw from participation
in the Plan by delivering a written notice of withdrawal to the Company or an agent designated by the Company (in accordance with such procedures and such timing as may be established by the Administrator). The Participant’s withdrawal will be
effective as of the next business day. Following a Participant’s withdrawal, the Company will promptly refund such individual’s entire account balance under the Plan to him or her (after payment for any Common Stock purchased before the
effective date of withdrawal). Partial withdrawals are not permitted. Such an employee may not begin participation again during the remainder of the Offering, but may enroll in a subsequent Offering in accordance with Section 4. 

8.    Grant of Options. On each Offering Date, the Company will grant to each eligible employee who is then a
Participant in the Plan an option (“Option”) to purchase on the last day of such Offering (the “Exercise Date”), at the Option Price (as defined herein), the lowest of (a) a number of shares of Common Stock determined by
dividing such Participant’s accumulated payroll deductions on such Exercise Date by the Option Price (as defined herein), (b) a number of shares determined by dividing $25,000 by the Fair Market Value on the Offering Date shares; or
(c) such other lesser maximum number of shares as shall have been established by the Administrator in advance of the Offering; provided, however, that such Option shall be subject to the limitations set forth below. Each Participant’s
Option shall be exercisable only to the extent of such Participant’s accumulated payroll deductions on the Exercise Date. The purchase price for each share purchased under each Option (the “Option Price”) will be 85 percent of
the Fair Market Value of the Common Stock on the Offering Date or the Exercise Date, whichever is less. 

  
 6 

 Notwithstanding the foregoing, no Participant may be granted an Option hereunder if such
Participant, immediately after the Option was granted, would be treated as owning stock possessing 5 percent or more of the total combined voting power or value of all classes of stock of the Company or any Parent or Subsidiary. For purposes of
the preceding sentence, the attribution rules of Section 424(d) of the Code shall apply in determining the stock ownership of a Participant, and all stock which the Participant has a contractual right to purchase shall be treated as stock owned
by the Participant. In addition, no Participant may be granted an Option which permits his or her rights to purchase stock under the Plan, and any other employee stock purchase plan of the Company and its Parents and Subsidiaries, to accrue at a
rate which exceeds $25,000 of the fair market value of such stock (determined on the option grant date or dates) for each calendar year in which the Option is outstanding at any time. The purpose of the limitation in the preceding sentence is to
comply with Section 423(b)(8) of the Code and shall be applied taking Options into account in the order in which they were granted. 

9.    Exercise of Option and Purchase of Shares. Each employee who continues to be a Participant in the Plan on the
Exercise Date shall be deemed to have exercised his or her Option on such date and shall acquire from the Company such number of whole shares of Common Stock reserved for the purpose of the Plan as his or her accumulated payroll deductions on such
date will purchase at the Option Price, subject to any other limitations contained in the Plan; provided that, with respect to the Initial Offering, the exercise of each Option shall be conditioned on the closing of the Company’s Initial Public
Offering on or before the Exercise Date. Unless otherwise determined by the Administrator in advance of an Offering, any amount remaining in a Participant’s account at the end of an Offering solely by reason of the inability to purchase a
fractional share will be carried forward to the next Offering; any other balance remaining in a Participant’s account at the end of an Offering will be refunded to the Participant promptly. 

  
 7 

 10.    Issuance of Certificates. Certificates or book-entries at
the Company’s transfer agent representing shares of Common Stock purchased under the Plan may be issued only in the name of the employee, in the name of the employee and another person of legal age as joint tenants with rights of survivorship,
or in the name of a broker authorized by the employee to be his, her or their, nominee for such purpose. 

11.    Definitions. 

The term “Affiliate” means any entity that, directly or indirectly through one or more intermediaries, controls, is controlled by or
is under the common control with the Company. 
 The term “Compensation” means the amount of base pay, prior to salary reduction
(such as pursuant to Sections 125, 132(f) or 401(k) of the Code), but excluding overtime, commissions, incentive or bonus awards, allowances and reimbursements for expenses such as relocation allowances or travel expenses, income or gains
related to Company stock options or other share-based awards, and similar items. The Administrator shall have the discretion to determine the application of this definition to Participants outside the United States. 

The term “Designated Company” means any present or future Subsidiary that has been designated by the Administrator to participate in
the Plan. The Administrator may so designate any Subsidiary or Affiliate, or revoke any such designation, at any time and from time to time, either before or after the Plan is approved by the stockholders, and may further designate such companies or
Participants as participating in the 423 Component or the Non-423 Component. The Administrator may also determine which affiliates or eligible employees may be excluded from participation in the Plan, to the
extent consistent with Section 423 of the Code or as implemented 

  
 8 

 
under the Non-423 Component, and determine which Designated Company or Companies will participate in separate Offerings (to the extent that the Company
makes separate Offerings). For purposes of the 423 Component, only the Company and its Subsidiaries may be Designated Companies; provided, however, that at any given time, a Subsidiary that is a Designated Company under the 423 Component will not be
a Designated Company under the Non-423 Component. 
 The term “Fair Market Value of the Common
Stock” on any given date means the fair market value of the Common Stock determined in good faith by the Administrator; provided, however, that if the Common Stock is admitted to quotation on The Nasdaq Global Market or another national
securities exchange, the determination shall be made by reference to the closing price on such date. If there is no closing price for such date, the determination shall be made by reference to the last date preceding such date for which there is a
closing price. Notwithstanding the foregoing, if the date for which Fair Market Value of the Common Stock is determined is the Registration Date, the Fair Market Value of the Common Stock shall be the “Price to the Public” (or equivalent)
set forth on the cover page for the final prospectus relating to the Company’s Initial Public Offering. 
 The term “Initial
Public Offering” means the first underwritten, firm commitment public offering pursuant to an effective registration statement under the U.S. Securities Act of 1933, as amended, covering the offer and sale by the Company of its Common Stock.

 The term “Parent” means a “parent corporation” with respect to the Company, as defined in Section 424(e) of the
Code. 
 The term “Participant” means an individual who is eligible as determined in Section 3 and who has complied with the
provisions of Section 4. 

  
 9 

 The term “Registration Date” means the date on which the registration statement on
Form S-1 that is filed by the Company with respect to its Initial Public Offering is declared effective by the U.S. Securities and Exchange Commission (the “SEC”). 

The term “Subsidiary” means a “subsidiary corporation” with respect to the Company, as defined in Section 424(f) of
the Code. 
 12.    Rights on Termination or Transfer of Employment. If a Participant’s employment
terminates for any reason before the Exercise Date for any Offering, no payroll deduction will be taken from any pay due and owing to the Participant and the balance in the Participant’s account will be paid to such Participant or, in the case
of such Participant’s death, if permitted by the Administrator and valid under applicable law, to his or her designated beneficiary or to the legal representative of his or her estate as if such Participant had withdrawn from the Plan under
Section 7. An employee will be deemed to have terminated employment, for this purpose, if the corporation that employs him or her, having been a Designated Company, ceases to be a Subsidiary or Affiliate, or if the employee is transferred to
any corporation other than the Company or a Designated Company. Unless otherwise determined by the Administrator, a Participant whose employment transfers between, or whose employment terminates with an immediate rehire (with no break in service)
by, Designated Companies or a Designated Company and the Company will not be treated as having terminated employment for purposes of participating in the Plan or an Offering; provided, however, that if a Participant transfers from an Offering under
the 423 Component to an Offering under the Non-423 Component, the exercise of the Participant’s Option will be qualified under the 423 Component only to the extent that such exercise complies with
Section 423 of the Code. If a Participant transfers from an Offering under the Non-423 Component to an Offering under the 423 Component, the exercise of the Participant’s Option will remain

  
 10 

 
non-qualified under the Non-423 Component. Further, an employee will not be deemed to have terminated employment
for purposes of this Section 12, if the employee is on an approved leave of absence where the employee’s right to reemployment is guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was
granted or if the Administrator otherwise provides in writing. 
 13.    Special Rules and Sub-Plans. Notwithstanding anything herein to the contrary, the Administrator may adopt special rules or sub-plans applicable to the employees of a particular Designated
Company, whenever the Administrator determines that such rules are necessary or appropriate for the implementation of the Plan in a jurisdiction where such Designated Company has employees, regarding, without limitation, eligibility to participate
in the Plan, handling and making of payroll deductions or contributions by other means, establishment of bank or trust accounts to hold payroll deductions, payment of interest, conversion of local currency, obligation to pay payroll tax, withholding
procedures and handling of share issuances, any of which may vary according to applicable requirements; provided that if such special rules or sub-plans are inconsistent with the requirements of
Section 423(b) of the Code the employees subject to such special rules or sub-plans will participate in the Non-423 Component. 

14.    Optionees Not Stockholders. Neither the granting of an Option to a Participant nor the deductions from his
or her pay shall result in such Participant becoming a holder of the shares of Common Stock covered by an Option under the Plan until such shares have been purchased by and issued to him or her. 

15.    Rights Not Transferable. Rights under the Plan are not transferable by a Participant other than by will or
the laws of descent and distribution, and are exercisable during the Participant’s lifetime only by the Participant. 

  
 11 

 16.    Application of Funds. All funds received or held by the
Company under the Plan may be combined with other corporate funds and may be used for any corporate purpose, unless otherwise required under applicable law. 

17.    Adjustment in Case of Changes Affecting Common Stock. In the event of a subdivision of outstanding shares of
Common Stock, the payment of a dividend in Common Stock or any other change affecting the Common Stock, the number of shares approved for the Plan and the share limitation set forth in Section 8 shall be equitably or proportionately adjusted to
give proper effect to such event. 
 18.    Amendment of the Plan. The Board may at any time and from time to
time amend the Plan in any respect, except that without the approval within 12 months of such Board action by the stockholders, no amendment shall be made increasing the number of shares approved for the Plan or making any other change that would
require stockholder approval in order for the 423 Component of the Plan, as amended, to qualify as an “employee stock purchase plan” under Section 423(b) of the Code. 

19.    Insufficient Shares. If the total number of shares of Common Stock that would otherwise be purchased on any
Exercise Date plus the number of shares purchased under previous Offerings under the Plan exceeds the maximum number of shares issuable under the Plan, the shares then available shall be apportioned among Participants in proportion to the amount of
payroll deductions accumulated on behalf of each Participant that would otherwise be used to purchase Common Stock on such Exercise Date. 

20.    Termination of the Plan. The Plan may be terminated at any time by the Board. Upon termination of the Plan,
all amounts in the accounts of Participants shall be promptly refunded. Unless terminated earlier, the Plan shall automatically terminate on the ten year anniversary of the Registration Date. 

  
 12 

 21.    Compliance with Law. The Company’s obligation to sell
and deliver Common Stock under the Plan is subject to applicable laws and the completion of any registration or qualification of the Common Stock under any U.S. or non-U.S. local, state or federal securities
or exchange control law, or under rulings or regulations of the SEC or of any other governmental regulatory body, and to obtaining any approval or other clearance from any U.S. and non-U.S. local, state or
federal governmental agency, which registration, qualification or approval the Company shall, in its absolute discretion, deem necessary or advisable. The Company is under no obligation to register or qualify the Common Stock with the SEC or any
other U.S. or non-U.S. securities commission or to seek approval or clearance from any governmental authority for the issuance or sale of such stock. 

22.    Governing Law. This Plan and all Options and actions taken thereunder shall be governed by, and construed in
accordance with the General Corporation Law of the State of Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of the State of Commonwealth of
Massachusetts applied without regard to conflict of law principles. 
 23.    Issuance of Shares. Shares may be
issued upon exercise of an Option from authorized but unissued Common Stock, from shares held in the treasury of the Company, or from any other proper source. 

24.    Tax Withholding. Participation in the Plan is subject to any applicable U.S. and non-U.S. federal, state or local tax withholding requirements on income the Participant realizes in connection with the Plan. Each Participant agrees, by entering the Plan, that the Company or any

  
 13 

 
Subsidiary or Affiliate may withhold from a Participant’s wages, salary or other compensation at any time the amount necessary for the Company or any Subsidiary or Affiliate to meet
applicable withholding obligations, including any withholding required to make available to the Company or any Subsidiary or Affiliate any tax deductions or benefits attributable to the sale or disposition of Common Stock by such Participant. In
addition, the Company or any Subsidiary or Affiliate may withhold from the proceeds of the sale of Common Stock or use any other method of withholding that the Company or any Subsidiary or Affiliate deems appropriate to the extent permitted by U.S.
Treasury Regulation Section 1.423-2(f) with respect to the 423 Component. The Company will not be required to issue any Common Stock under the Plan until such obligations are satisfied. 

25.    Notification Upon Sale of Shares under the 423 Component. Each Participant agrees, by entering the 423
Component of the Plan, to give the Company prompt notice of any disposition of shares purchased under the Plan where such disposition occurs within two years after the date of grant of the Option pursuant to which such shares were purchased or
within one year after the date such shares were purchased. 
 26.    Effective Date and Approval of Shareholders.
The Plan shall take effect on the date immediately preceding the Registration Date, subject to approval by the holders of a majority of the votes cast at a meeting of stockholders at which a quorum is present or by written consent of the
stockholders. 
 DATE APPROVED BY BOARD OF DIRECTORS: December 31, 2020 

DATE APPROVED BY STOCKHOLDERS: January 3, 2021 

  
 14EX-10.22

 Exhibit 10.22 

CULLINAN MANAGEMENT, INC. 

CONTRIBUTION AGREEMENT 

THIS CONTRIBUTION AGREEMENT (this “Agreement”) is made as of [●], 2021, by and among Cullinan Management, Inc., a
Delaware corporation (the “Company”), and Cullinan Oncology, LLC, a Delaware limited liability company (the “Contributor”). 

RECITALS: 
 WHEREAS, the
Contributor owns certain interests in its subsidiaries (the “Subsidiaries”) and now desires to effect a reorganization through contributing such interests to the Company; and 

WHEREAS, the Company wishes to issue to the Contributor an aggregate of 19,750,230 of the Company’s authorized but unissued Common Stock,
par value $0.0001 per share (“Common Stock”) in exchange for the contribution by the Contributor of the interests set forth on Schedule I attached to this Agreement (collectively, the “Contributed
Interests”). 
 NOW, THEREFORE, in consideration of the mutual promises and covenants contained in this Agreement, the parties
hereto agree as follows: 
 1.    ISSUANCE OF STOCK. 

1.1    Issuance of Common Stock. Subject to the terms and conditions of this Agreement, at the
Closing, the Company agrees to issue to the Contributor, and Contributor agrees to purchase from the Company, the number of shares of Common Stock set forth on Schedule I, in exchange for the number and type of Contributed
Interests set forth on Schedule I. The shares of Common Stock issued to the Contributor pursuant to this Agreement shall be referred to in this Agreement as the “Shares.” 

1.2    Closing; Delivery. 

(a)    The closing of the contribution of Contributed Interests in exchange for shares of Common Stock (the
“Closing”) shall take place remotely via the exchange of documents and signatures on the date hereof. At the Closing, the Contributor shall contribute to the Company the number and type of Contributed Interests set forth opposite
the name of the Contributor on Schedule I under the column labeled “Contributed Interests” in exchange for the issuance by the Company to the Contributor of the shares of Common Stock set forth opposite the name of the Contributor
on Schedule I under the column labeled “Company Common Stock”. 
 (b)    At the Closing, the
Contributor shall deliver to the Company duly executed stock powers and any other transfer documents required to transfer such Contributed Interests to the Company at the Closing. 

1.3    Tax Treatment. The Contributor and the Company intend that the contribution of the Contributed
Interests to the Company by the Contributor in exchange for shares of Common Stock be treated as a tax free contribution pursuant to Section 351 of the Internal Revenue Code of 1986, as amended, and agree to treat the contribution as such for
all federal, state and local income tax purposes and further agree to not take any position that is inconsistent with such treatment unless required by applicable law. 

 1.4    Defined Terms Used in this Agreement. In
addition to the terms defined above and elsewhere in this Agreement, the following terms used in this Agreement shall be construed to have the meanings set forth below. 

“Person” means any individual, corporation, partnership, trust, limited liability company, association or other entity. 

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

“Transaction Agreements” means this Agreement and any other agreements or instruments entered into in connection with this
Agreement. 
 2.    REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company hereby represents and
warrants to the Contributor that the following representations are true and correct as of the date hereof. 

2.1    Organization, Good Standing, Corporate Power and Qualification. The Company is a corporation
duly organized, validly existing and in good standing under the laws of the State of Delaware and has all requisite corporate power and authority to (a) enter into this Agreement and each of the other Transaction Agreements and to perform its
obligations hereunder and thereunder and (b) issue, sell and deliver the Shares to be issued, sold and delivered to the Contributor at the Closing. 

2.2    Capitalization. Immediately prior to the Closing, the authorized capital of the Company
consists of 19,750,330 shares Common Stock, 100 of which are issued and outstanding. 

2.3    Authorization. All action required to be taken by the Company’s Board of Directors and
the Company’s sole shareholder in order to authorize the Company to enter into the Transaction Agreements and to issue the Shares at the Closing has been taken. All action on the part of the officers of the Company necessary for the execution
and delivery of the Transaction Agreements, the performance of all obligations of the Company under the Transaction Agreements, and the issuance and delivery of the Shares, has been taken. The Transaction Agreements, when executed and delivered by
the Company, shall constitute valid and legally binding obligations of the Company, enforceable against the Company in accordance with their respective terms except (a) as limited by applicable bankruptcy, insolvency, reorganization,
moratorium, fraudulent conveyance or other laws of general application relating to or affecting the enforcement of creditors’ rights generally, (b) as limited by laws relating to the availability of specific performance, injunctive relief
or other equitable remedies or (c) to the extent the indemnification provisions contained in any Transaction Agreement may be limited by applicable federal or state securities laws. 

2.4    Valid Issuance of Shares. The Shares, when issued, sold and delivered in accordance with the
terms and for the consideration set forth in this Agreement, will be validly 

 
issued, fully paid and nonassessable and free and clear of all liens, encumbrances and restrictions on transfer other than restrictions on transfer under the Transaction Agreements, applicable
state and federal securities laws and liens or encumbrances created by or imposed by a Contributor. Assuming the accuracy of the representations of the Contributor in Section 3 of this Agreement, the Shares will be offered,
issued and sold in compliance with all applicable federal and state securities laws, and it is not necessary in connection with the offer, sale and delivery of the Shares in the manner contemplated by this Agreement to register the offer or sale of
any of the Shares by the Company under any applicable federal or state securities laws. 
 2.5    No
General Solicitation. Neither the Company, nor any of its officers, directors, employees or agents, has either directly or indirectly, including through a broker or finder, (a) engaged in any general solicitation or (b) published
any advertisement in connection with the offer and sale of the Shares. 
 3.    REPRESENTATIONS AND WARRANTIES
OF THE CONTRIBUTOR. The Contributor hereby represents and warrants to the Company that the following representations are true and correct as of the date hereof and as of the Closing: 

3.1    Organization, Good Standing, Company Power and Qualification. The Contributor is a limited
liability company duly formed, validly existing and in good standing under the laws of the State of Delaware and has all requisite power and authority to enter into this Agreement and each of the other Transaction Agreements and to perform its
obligations hereunder and thereunder. 
 3.2    Title to Contributed
Interests. The Contributor is the owner of record and has good and marketable title free and clear of all liens to the Contributed Interests set forth opposite the Contributor’s name on Schedule I, free and clear of any and all
liens. The Contributor is not a party to any option, warrant, purchase right or other contract or commitment (other than this Agreement) that could require the Contributor to sell, transfer or otherwise dispose of all or a portion of such
Contributed Interests. 
 3.3    Purchase Entirely for Own Account. This Agreement is made with the
Contributor in reliance upon the Contributor’s representation to the Company, which by the Contributor’s execution of this Agreement, the Contributor hereby confirms, that the Shares to be acquired by the Contributor will be acquired for
investment for the Contributor’s own account and not with a view to the resale or distribution of any part thereof, and that the Contributor has no present intention of selling, granting any participation in, or otherwise distributing the same.
By executing this Agreement, the Contributor further represents that the Contributor does not presently have any contract, undertaking, agreement or arrangement with any Person to sell, transfer or grant participations to such Person or to any third
Person, with respect to any of the Shares. 
 3.4    Restricted Securities. The Contributor
understands that the Shares have not been, and will not be, registered under the Securities Act, by reason of a specific exemption from the registration provisions of the Securities Act which depends upon, among other things, the bona fide nature of
the investment intent and the accuracy of the Contributor’s representations as expressed herein. The Contributor understands that the Shares are “restricted securities” under 

 
applicable U.S. federal and state securities laws and that, pursuant to these laws, the Contributor must hold the Shares indefinitely unless they are registered with the Securities and
Exchange Commission and qualified by state authorities, or an exemption from such registration and qualification requirements is available. The Contributor acknowledges that the Company has no obligation to register or qualify the Shares for resale.
The Contributor further acknowledges that if an exemption from registration or qualification is available, it may be conditioned on various requirements including, but not limited to, the time and manner of sale, the holding period for the Shares,
and on requirements relating to the Company which are outside of the Contributor’s control, and which the Company is under no obligation to satisfy and may not be able to satisfy. 

3.5    No Public Market. The Contributor understands that no public market now exists for the Shares,
and that the Company has made no assurances that a public market will ever exist for the Shares. 

3.6    Investigation. 

(a)    The Contributor has received all the information he or she considers necessary or appropriate for deciding whether
to purchase the Shares. The Contributor further represents that he or she has had an opportunity to ask questions and receive answers from the Company regarding the terms and conditions of the offering of the Shares and the business, properties,
prospects and financial condition of the Company, and answers have been provided to all such questions to the full satisfaction of the Contributor. 

(b)    The Contributor acknowledges that he, she or it is able to fend for himself or herself, can bear the economic risk
of his, her or its investment, and has such knowledge and experience in financial or business matters that the Contributor is capable of evaluating the merits and risks of the investment in the Shares. The Contributor has completed his, her or its
own analysis with respect to the terms of this Agreement, and to the extent the Contributor believes such discussion necessary, discussed this Agreement with his or her legal, tax and financial advisers. 

(c)    Except for the representations and warranties of the Company in Section 2 of this
Agreement, the Contributor has not relied on any representations, warranties or other information (whether oral or written) from the Company or any of its managers, officers, equityholders, employees, agents or affiliates. 

3.7    No “Bad Actor” Disqualification Event. The principal place of business of the
Contributor or, if the Contributor is an individual, the principal residence of the Contributor, is set forth on Schedule I. No “Bad Actor” disqualifying event described in Rule 506(d)(1)(i) to (viii) of the
Securities Act (a “Disqualification Event”) is applicable to the Contributor or any of its affiliates, except for a Disqualification Event as to which Rule 506(d)(2)(ii)–(iv) or (d)(3), is applicable. 

3.8    No General Solicitation. Neither the Contributor, nor any of its officers, directors,
employees, agents, equityholders or partners, has either directly or indirectly, including through a broker or finder, (a) engaged in any general solicitation or (b) published any advertisement in connection with the offer and sale of the
Shares. 

 4.    CONDITIONS TO THE CLOSING. The obligations of the
Company at the Closing are subject to the fulfillment, on or before the Closing, of each of the following conditions, unless waived by the Company: 

4.1    Proceedings and Documents. All corporate and other proceedings in connection with the
transactions contemplated at the Closing and all documents incident thereto shall be reasonably satisfactory in form and substance to the Company, and the Company (or its counsel) shall have received all such counterpart original and certified or
other copies of such documents as reasonably requested. Such documents may include good standing certificates. 

5.    MISCELLANEOUS. 

5.1    Survival of Warranties. Unless otherwise set forth in this Agreement, the representations and
warranties of the Company and the Contributor contained in this Agreement shall survive the execution and delivery of this Agreement and the Closing and shall in no way be affected by any investigation or knowledge of the subject matter thereof made
by or on behalf of the Contributor or the Company. 
 5.2    Successors and Assigns. The terms and
conditions of this Agreement shall inure to the benefit of and be binding upon the respective successors and assigns of the parties. Nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or
their respective successors and assigns any rights, remedies, obligations or liabilities under or by reason of this Agreement, except as expressly provided in this Agreement. 

5.3    Amendments. Any term of this Agreement may be amended, terminated or waived only with the
written consent of the Company and the Contributor. Any amendment or waiver effected in accordance with this Section 5.3 shall be binding upon the Contributor and each transferee of the Shares, each future holder of all
such securities, and the Company. 
 5.4    Equitable Remedies. The parties hereto agree that
irreparable harm would occur in the event that any of the agreements and provisions of this Agreement were not performed fully by the parties hereto in accordance with their specific terms or were otherwise breached, and that money damages are an
inadequate remedy for breach hereof because of the difficulty of ascertaining and quantifying the amount of damage that will be suffered by the parties hereto in the event that this Agreement is not performed in accordance with its terms or is
otherwise breached. It is accordingly hereby agreed that the parties hereto shall be entitled to an injunction or injunctions to restrain, enjoin and prevent breaches of this Agreement by the Company and the Contributor party hereto and to enforce
specifically such terms and provisions of this Agreement against the Company and the Contributor party hereto, as applicable, in any court of the United States or any state having jurisdiction, such remedy being in addition to and not in lieu of,
any other rights and remedies to which the parties are entitled to hereunder and at law or in equity. 

5.5    Further Actions. Each party hereto agrees to perform all further acts and execute,
acknowledge, or deliver any instruments or documents and to perform such additional acts that are not inconsistent with the terms set forth in this Agreement as may be reasonably necessary, appropriate, or desirable to carry out the provisions of
this Agreement. 

 5.6    Notices. All demands, notices, requests,
consents and other communications required or permitted under this Agreement shall be in writing and shall be personally delivered or sent by electronic mail, if to the Company, addressed to Cullinan Management, Inc., Attn: Owen Hughes, Email:
ohughes@cullinanoncology.com, with a copy to Goodwin Procter LLP, 100 Northern Avenue, Boston, MA 02210, Attn: Danielle Lauzon; Email: dlauzon@goodwinlaw.com, and if to the Contributor, at its address set forth on
Schedule I. 
 5.7    Counterparts; Electronic Signature. This Agreement
may be executed and delivered by facsimile transmission, .pdf or other digital or electronic means, and in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

 5.8    Entire Agreement; Severability. This Agreement (including the Schedules and Exhibits
hereto) and the other Transaction Agreements constitute the full and entire understanding and agreement between the parties with respect to the subject matter hereof, and any other written or oral agreement relating to the subject matter hereof
existing between the parties are expressly canceled. The invalidity or unenforceability of any provision hereof shall in no way affect the validity or enforceability of any other provision. 

5.9    Governing Law. This Agreement (including any claim or controversy arising out of or relating
to this Agreement) shall be governed by and construed in accordance with the internal laws of the State of Delaware. 

5.10    Dispute Resolution; Jurisdiction. The parties (a) hereby irrevocably and unconditionally
submit to the jurisdiction of the federal and state courts located within the State of Delaware for the purpose of any suit, action or other proceeding arising out of or based upon this Agreement, (b) agree not to commence any suit, action or
other proceeding arising out of or based upon this Agreement except in the federal and state courts located within the State of Delaware and (c) hereby waive, and agree not to assert, by way of motion, as a defense, or otherwise, in any such
suit, action or proceeding, any claim that it is not subject personally to the jurisdiction of the above-named courts, that its property is exempt or immune from attachment or execution, that the suit, action or proceeding is brought in an
inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court. Each of the parties to this Agreement consents to personal jurisdiction in
the State of Delaware. 
 5.11    Waiver of Jury Trial. EACH PARTY HEREBY WAIVES, TO THE FULLEST
EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT, ANY OTHER TRANSACTION AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY
OR THEREBY (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY). EACH PARTY HEREBY (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE
EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HAVE BEEN INDUCED TO 

 
ENTER INTO THIS AGREEMENT AND THE OTHER TRANSACTION AGREEMENTS BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 5.11. 

[Remainder of page intentionally left blank.] 

 IN WITNESS WHEREOF, the parties have executed this Contribution Agreement as of the date
first written above. 
  

			
	COMPANY:
	
	CULLINAN MANAGEMENT, INC.

 
			
		
	By:	 	  

 
			
	Name: Owen Hughes
	Title: President

 [Signature page to Contribution Agreement] 

 IN WITNESS WHEREOF, the parties have executed this Contribution Agreement as of the date
first written above. 
  

			
	CONTRIBUTOR:
	
	CULLINAN ONCOLOGY, LLC

 
			
		
	By:	 	  

 
			
	Name: Owen Hughes
	Title: President and CEO

 
			
		
	Date:	 	  

 [Signature page to Contribution Agreement] 

 SCHEDULE I 

SCHEDULE OF CONTRIBUTED INTERESTS 
  

							
	 	  	 Contributed Interests
	  	Company Common
Stock	 
	 Cullinan Oncology, LLC
	  	 Cullinan Amber Corp.
 512,630 shares of
Common Stock
 3,000,000 shares of Series A Preferred Stock
	  	 	1,558,006	 
			
		  	 Cullinan Pearl Corp.
 4,601,059 shares of
Common Stock
 19,934,000 shares of Series A Preferred Stock
	  	 	10,944,994	 
			
		  	 Cullinan Florentine Corp.
 729,678 shares of
Common Stock
 12,000,000 shares of Series A Preferred Stock
	  	 	4,789,946	 
			
		  	 Cullinan Mica Corp.
 3,367,804 shares of
Common Stock
 5,385,787 shares of Series A Preferred Stock
	  	 	2,401,728	 
			
		  	 Cullinan Apollo Corp.
 1,000 shares of Common
Stock
 3,000,000 shares of Series A Preferred Stock
	  	 	55,556	 
		  		  	  
	  
	 
	 Total:
	  		  	 	19,750,230

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00318-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00318-of-00352.parquet"}]]