Document:

EX-10.21

 Exhibit 10.21 

CERTAIN IDENTIFIED INFORMATION HAS BEEN EXCLUDED (INDICATED BY: [***]) FROM THE EXHIBIT BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) WOULD LIKELY
CAUSE COMPETITIVE HARM IF PUBLICLY DISCLOSED. 
 AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

 TABLE OF CONTENTS 

 

									
	 	  	 	  	 	  	Page	 
	1.	  	 Definitions
	  	 	1	 
			
	2.	  	 Registration Rights
	  	 	4	 
				
		  	 2.1
	  	 Demand Registration
	  	 	4	 
		  	 2.2
	  	 Company Registration
	  	 	6	 
		  	 2.3
	  	 Underwriting Requirements
	  	 	6	 
		  	 2.4
	  	 Obligations of the Company
	  	 	7	 
		  	 2.5
	  	 Furnish Information
	  	 	8	 
		  	 2.6
	  	 Expenses of Registration
	  	 	8	 
		  	 2.7
	  	 Delay of Registration
	  	 	9	 
		  	 2.8
	  	 Indemnification
	  	 	9	 
		  	 2.9
	  	 Reports Under Exchange Act
	  	 	10	 
		  	 2.10
	  	 Limitations on Subsequent Registration Rights
	  	 	11	 
		  	 2.11
	  	 “Market Stand-off”‘ Agreement
	  	 	11	 
		  	 2.12
	  	 Restrictions on Transfer
	  	 	12	 
		  	 2.13
	  	 Termination of Registration Rights
	  	 	13	 
			
	3.	  	 Information and Observer Rights
	  	 	13	 
				
		  	 3.1
	  	 Delivery of Financial Statements
	  	 	13	 
		  	 3.2
	  	 Inspection
	  	 	14	 
		  	 3.3
	  	 Observer Rights
	  	 	14	 
		  	 3.4
	  	 Termination of Information and Observer Rights
	  	 	15	 
		  	 3.5
	  	 Confidentiality
	  	 	15	 
			
	4.	  	 Rights to Future Stock Issuances
	  	 	16	 
				
		  	 4.1
	  	 Right of First Offer
	  	 	16	 
		  	 4.2
	  	 Termination
	  	 	17	 
			
	5.	  	 Additional Covenants
	  	 	17	 
				
		  	 5.1
	  	 Insurance
	  	 	17	 
		  	 5.2
	  	 Employee Agreements
	  	 	17	 
		  	 5.3
	  	 Employee Stock
	  	 	17	 
		  	 5.4
	  	 Matters Requiring Investor Director Approval
	  	 	18	 
		  	 5.5
	  	 Board Matters
	  	 	18	 
		  	 5.6
	  	 Successor Indemnification
	  	 	18	 
		  	 5.7
	  	 Expenses of Counsel
	  	 	18	 
		  	 5.8
	  	 Indemnification Matters
	  	 	19	 
		  	 5.9
	  	 Right to Conduct Activities
	  	 	19	 
		  	 5.10
	  	 Covered Investment Rights
	  	 	19	 
		  	 5.11
	  	 Covered Company Rights
	  	 	19	 
		  	 5.12
	  	 Cybersecurity
	  	 	20	 
		  	 5.13
	  	 Termination of Covenants
	  	 	20	 
			
	6.	  	 Miscellaneous
	  	 	20	 
				
		  	 6.1
	  	 Successors and Assigns
	  	 	20	 
		  	 6.2
	  	 Governing Law
	  	 	21	 
		  	 6.3
	  	 Counterparts
	  	 	21	 
		  	 6.4
	  	 Titles and Subtitles
	  	 	21	 

  
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		  	 6.5
	  	 Notices
	  	 	21	 
		  	 6.6
	  	 Amendments and Waivers
	  	 	21	 
		  	 6.7
	  	 Severability
	  	 	22	 
		  	 6.8
	  	 Aggregation of Stock
	  	 	22	 
		  	 6.9
	  	 Additional Investors
	  	 	22	 
		  	 6.10
	  	 Entire Agreement
	  	 	22	 
		  	 6.11
	  	 Dispute Resolution
	  	 	23	 
		  	 6.12
	  	 Delays or Omissions
	  	 	23	 

  

							
	 Schedule A
	  	 	-  	 	  	Schedule of Investors

  
 ii 

 AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

THIS AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT (this “Agreement”), is made as of the 30th day of June,
2020, by and among Vor Biopharma Inc., a Delaware corporation (the “Company”), and each of the investors listed on Schedule A hereto, each of which is referred to in this Agreement as an “Investor”, and any
Additional Purchaser (as defined in the Purchase Agreement) that becomes a party to this Agreement in accordance with Section 6.9 hereof. 

RECITALS 
 WHEREAS,
certain of the Investors (the “Existing Investors”) hold shares of the Company’s Series A-1 Preferred Stock, Series A-2 Preferred Stock and/or
shares of Common Stock issued upon conversion thereof and possess registration rights, information rights, rights of first offer and other rights pursuant to that certain Investors’ Rights Agreement dated [***] by and among the Company and such
Existing Investors (the “Prior Agreement”); 
 WHEREAS, the Existing Investors are holders of [***] of the Common
Stock issuable or issued upon conversion of the Series A-2 Preferred Stock and desire to amend and restate the Prior Agreement in its entirety and to accept the rights created pursuant to this Agreement in
lieu of the rights granted to them under the Prior Agreement; and 
 WHEREAS, the Company and certain of the Investors are parties to
that certain Series B Preferred Stock Purchase Agreement of even date herewith (as amended from time to time, the “Purchase Agreement”), under which certain of the Company’s and such Investors’ obligations are conditioned
upon the execution and delivery of this Agreement by such Investors, the Company and Existing Investors holding [***] of the Common Stock issuable or issued upon conversion of the Series A-2 Preferred Stock.

 NOW, THEREFORE, the Existing Investors hereby agree that the Prior Agreement shall be amended and restated, and the parties
to this Agreement further agree as follows: 
 1. Definitions. For purposes of this Agreement: 

1.1 “Affiliate” means, with respect to any specified Person, any other Person who, directly or indirectly, controls, is
controlled by, or is under common control with such Person, including without limitation any general partner, managing member, officer, director or trustee of such Person, or any investment fund or registered investment company now or hereafter
existing that is controlled by one or more general partners, managing members or investment adviser of, or shares the same management company or investment adviser with, such Person. 

1.2 “Board of Directors” means the board of directors of the Company. 

1.3 “Certificate of Incorporation” means the Company’s Amended and Restated Certificate of Incorporation, as amended
and/or restated from time to time. 
 1.4 “Common Stock” means shares of the Company’s common stock, par value $0.0001
per share. 
 1.5 “Competitor” means a Person engaged, directly or indirectly (including through any partnership, limited
liability company, corporation, joint venture or similar arrangement (whether now existing or formed hereafter)), in the development or commercialization of genome edited hematopoietic stem cell therapies, but shall not include [***]. 

 1.6 “Damages” means any loss, damage, claim or liability (joint or several)
to which a party hereto may become subject under the Securities Act, the Exchange Act, or other federal or state law, insofar as such loss, damage, claim or liability (or any action in respect thereof) arises out of or is based upon: (a) any
untrue statement or alleged untrue statement of a material fact contained in any registration statement of the Company, including any preliminary prospectus or final prospectus contained therein or any amendments or supplements thereto; (b) an
omission or alleged omission to state therein a material fact required to be stated therein, or necessary to make the statements therein not misleading; or (c) any violation or alleged violation by the indemnifying party (or any of its agents
or Affiliates) of the Securities Act, the Exchange Act, any state securities law, or any rule or regulation promulgated under the Securities Act, the Exchange Act, or any state securities law. 

1.7 “Derivative Securities” means any securities or rights convertible into, or exercisable or exchangeable for (in each
case, directly or indirectly), Common Stock, including options and warrants. 
 1.8 “Exchange Act” means the Securities
Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. 
 1.9 “Excluded Registration”
means (a) a registration relating to the sale or grant of securities to employees of the Company or a subsidiary pursuant to a stock option, stock purchase, equity incentive or similar plan; (b) a registration relating to an SEC Rule 145
transaction; (c) a registration on any form that does not include substantially the same information as would be required to be included in a registration statement covering the sale of the Registrable Securities; or (d) a registration in
which the only Common Stock being registered is Common Stock issuable upon conversion of debt securities that are also being registered. 

1.10 “FOIA Party” means a Person that, in the reasonable determination of the Board of Directors, may be subject to, and
thereby required to disclose non-public information furnished by or relating to the Company under, the Freedom of Information Act, 5 U.S.C. 552 (“FOIA”), any state public records access law,
any state or other jurisdiction’s laws similar in intent or effect to FOIA, or any other similar statutory or regulatory requirement. 

1.11 “Form S-1” means such form under the Securities Act as in effect on the date
hereof or any successor registration form under the Securities Act subsequently adopted by the SEC. 
 1.12 “Form S-3” means such form under the Securities Act as in effect on the date hereof or any registration form under the Securities Act subsequently adopted by the SEC that permits forward incorporation of
substantial information by reference to other documents filed by the Company with the SEC. 
 1.13 “GAAP” means generally
accepted accounting principles in the United States as in effect from time to time. 
 1.14 “Holder” means any holder of
Registrable Securities who is a party to this Agreement. 
 1.15 “Immediate Family Member” means a child, stepchild,
grandchild, parent, stepparent, grandparent, spouse, domestic partner, sibling, mother-in-law,
father-in-law, son-in-law, daughter-in-law, brother-in-law, or
sister-in-law, including, adoptive relationships, of a natural person referred to herein. 

1.16 “Independent Director” means the director appointed pursuant to Subsection 1.2(e) of the Voting Agreement of even date
herewith, as the same may be amended from time to time. 

  
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 1.17 “Initiating Holders” means, collectively, Holders who properly
initiate a registration request under this Agreement. 
 1.18 “IPO” means the Company’s first underwritten public
offering of its Common Stock under the Securities Act. 
 1.19 “Key Employee” means any executive-level employee
(including, division director and vice president-level positions) as well as any employee who, either alone or in concert with others, develops, invents, programs, or designs any Company Intellectual Property (as defined in the Purchase Agreement).

 1.20 “Major Investor” means any Investor that, individually or together with such Investor’s Affiliates, holds at
least [***] shares of Registrable Securities (as adjusted for any stock split, stock dividend, combination, or other recapitalization or reclassification effected after the date hereof). 

1.21 “New Securities” means, collectively, equity securities of the Company, whether or not currently authorized, as well as
rights, options, or warrants to purchase such equity securities, or securities of any type whatsoever that are, or may become, convertible or exchangeable into or exercisable for such equity securities. 

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

 1.23 “Preferred Directors” means, [***]. 

1.24 “Preferred Stock” means, collectively, shares of the Company’s Series A-1
Preferred Stock, Series A-2 Preferred Stock and Series B Preferred Stock. 
 1.25
“Registrable Securities” means (a) the Common Stock issuable or issued upon conversion of the Preferred Stock, excluding any Common Stock issued upon conversion of the Preferred Stock pursuant to the “Special Mandatory
Conversion” provisions of the Certificate of Incorporation; (b) any Common Stock, or any Common Stock issued or issuable (directly or indirectly) upon conversion and/or exercise of any other securities of the Company, acquired by the
Investors after the date hereof; and (c) any Common Stock issued as (or issuable upon the conversion or exercise of any warrant, right, or other security that is issued as) a dividend or other distribution with respect to, or in exchange for or
in replacement of, the shares referenced in clauses (a) and (b) above; excluding in all cases, however, any Registrable Securities sold by a Person in a transaction in which the applicable rights under this Agreement are not assigned pursuant
to Subsection 6.1, and excluding for purposes of Section 2 any shares for which registration rights have terminated pursuant to Subsection 2.13 of this Agreement. 

1.26 “Registrable Securities then outstanding” means the number of shares determined by adding the number of shares of
outstanding Common Stock that are Registrable Securities and the number of shares of Common Stock issuable (directly or indirectly) pursuant to then exercisable and/or convertible securities that are Registrable Securities. 

1.27 “Requisite Directors” means [***]. 

1.28 “Restricted Securities” means the securities of the Company required to be notated with the legend set forth in
Subsection 2.12(b) hereof. 
 1.29 “SEC” means the Securities and Exchange Commission. 

  
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 1.30 “SEC Rule 144” means Rule 144 promulgated by the SEC under the
Securities Act. 
 1.31 “SEC Rule 145” means Rule 145 promulgated by the SEC under the Securities Act. 

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

 1.33 “Selling Expenses” means all underwriting discounts, selling commissions, and stock transfer taxes applicable to
the sale of Registrable Securities, and fees and disbursements of counsel for any Holder, except for the fees and disbursements of the Selling Holder Counsel borne and paid by the Company as provided in Subsection 2.6. 

1.34 [***]. 
 1.35 [***]. 

1.36 “Series A-1 Preferred Stock” means shares of the Company’s Series A-1 Preferred Stock, par value $0.0001 per share. 
 1.37 “Series
A-2 Preferred Stock” means shares of the Company’s Series A-2 Preferred Stock, par value $0.0001 per share. 

1.38 “Series B Preferred Stock” means shares of the Company’s Series B Preferred Stock, par value $0.0001 per share.

 1.39 “Voting Agreement” means that certain Amended and Restated Voting Agreement of even date herewith by and between
the Company and the other parties named therein. 
 2. Registration Rights. The Company covenants and agrees as follows: 

2.1 Demand Registration. 

(a) Form S-1 Demand. If at any time after the earlier of (i) [***] after the date of this
Agreement or (ii) [***] after the effective date of the registration statement for the IPO, the Company receives a request from Holders of at least [***] of the Registrable Securities then outstanding that the Company file a Form S-1 registration statement with respect to at least [***] of the Registrable Securities then outstanding (or a lesser percent if the anticipated aggregate offering price, net of Selling Expenses, would exceed
[***]), then the Company shall (x) within [***] after the date such request is given, give notice thereof (the “Demand Notice”) to all Holders other than the Initiating Holders; and (y) as soon as
practicable, and in any event within [***] after the date such request is given by the Initiating Holders, file a Form S-1 registration statement under the Securities Act covering all Registrable Securities
that the Initiating Holders requested to be registered and any additional Registrable Securities requested to be included in such registration by any other Holders, as specified by notice given by each such Holder to the Company within [***] of the
date the Demand Notice is given, and in each case, subject to the limitations of Subsections 2.1(c) and 2.3. 
 (b) Form S-3 Demand. If at any time when it is eligible to use a Form S-3 registration statement, the Company receives a request from Holders of at least [***] of the Registrable
Securities then outstanding that the Company file a Form S-3 registration statement with respect to outstanding Registrable Securities of such Holders having an anticipated aggregate offering price, net of
Selling Expenses, of at least [***], then the Company shall (i) within [***] after the date such request is given, give a Demand 

  
 4 

 
Notice to all Holders other than the Initiating Holders; and (ii) as soon as practicable, and in any event within [***] after the date such request is given by the Initiating Holders, file a
Form S-3 registration statement under the Securities Act covering all Registrable Securities requested to be included in such registration by any other Holders, as specified by notice given by each such Holder
to the Company within [***] of the date the Demand Notice is given, and in each case, subject to the limitations of Subsections 2.1(c) and 2.3. 

(c) Notwithstanding the foregoing obligations, if the Company furnishes to Holders requesting a registration pursuant to this Subsection
2.1 a certificate signed by the Company’s chief executive officer stating that in the good faith judgment of the Board of Directors it would be materially detrimental to the Company and its stockholders for such registration statement to
either become effective or remain effective for as long as such registration statement otherwise would be required to remain effective, because such action would (i) materially interfere with a significant acquisition, corporate reorganization,
or other similar transaction involving the Company; (ii) require premature disclosure of material information that the Company has a bona fide business purpose for preserving as confidential; or (iii) render the Company
unable to comply with requirements under the Securities Act or Exchange Act, then the Company shall have the right to defer taking action with respect to such filing, and any time periods with respect to filing or effectiveness thereof shall be
tolled correspondingly, for a period of not more than [***] after the request of the Initiating Holders is given; provided, however, that the Company may not invoke this right more than [***] in any [***] period; and provided
further that the Company shall not register any securities for its own account or that of any other stockholder during such [***] period other than pursuant to a registration relating to the sale or grant of securities to employees of the
Company or a subsidiary pursuant to a stock option, stock purchase, equity incentive or similar plan; a registration on any form that does not include substantially the same information as would be required to be included in a registration statement
covering the sale of the Registrable Securities; or a registration in which the only Common Stock being registered is Common Stock issuable upon conversion of debt securities that are also being registered. 

(d) The Company shall not be obligated to effect, or to take any action to effect, any registration pursuant to Subsection 2.1(a)(i)
during the period that is [***] before the Company’s good faith estimate of the date of filing of, and ending on a date that is [***] after the effective date of, a Company-initiated registration, provided that the Company is actively
employing in good faith commercially reasonable efforts to cause such registration statement to become effective; (ii) after the Company has effected [***] registrations pursuant to Subsection 2.1(a); or (iii) if the
Initiating Holders propose to dispose of shares of Registrable Securities that may be immediately registered on Form S-3 pursuant to a request made pursuant to Subsection 2.1(b). The Company shall not
be obligated to effect, or to take any action to effect, any registration pursuant to Subsection 2.1(b) (i) during the period that is [***] before the Company’s good faith estimate of the date of filing of, and ending on a
date that is [***] after the effective date of, a Company-initiated registration, provided that the Company is actively employing in good faith commercially reasonable efforts to cause such registration statement to become effective; or
(ii) if the Company has effected [***] registrations pursuant to Subsection 2.1(b) within the [***] period immediately preceding the date of such request. A registration shall not be counted as “effected” for purposes of
this Subsection 2.1(d) until such time as the applicable registration statement has been declared effective by the SEC, unless the Initiating Holders withdraw their request for such registration, elect not to pay the registration expenses
therefor, and forfeit their right to one demand registration statement pursuant to Subsection 2.6, in which case such withdrawn registration statement shall be counted as “effected” for purposes of this Subsection 2.1(d);
provided, that if such withdrawal is during a period the Company has deferred taking action pursuant to Subsection 2.1(c), then the Initiating Holders may withdraw their request for registration and such registration will not be
counted as “effected” for purposes of this Subsection 2.1(d). 

  
 5 

 2.2 Company Registration. If the Company proposes to register (including, for this
purpose, a registration effected by the Company for stockholders other than the Holders) any of its securities under the Securities Act in connection with the public offering of such securities solely for cash (other than in an Excluded
Registration), the Company shall, at such time, promptly give each Holder notice of such registration. Upon the request of each Holder given within [***] after such notice is given by the Company, the Company shall, subject to the provisions of
Subsection 2.3, cause to be registered all of the Registrable Securities that each such Holder has requested to be included in such registration. The Company shall have the right to terminate or withdraw any registration initiated by it under
this Subsection 2.2 before the effective date of such registration, whether or not any Holder has elected to include Registrable Securities in such registration. The expenses (other than Selling Expenses) of such withdrawn registration
shall be borne by the Company in accordance with Subsection 2.6. 
 2.3 Underwriting Requirements. 

(a) If, pursuant to Subsection 2.1, the Initiating Holders intend to distribute the Registrable Securities covered by their request by
means of an underwriting, they shall so advise the Company as a part of their request made pursuant to Subsection 2.1, and the Company shall include such information in the Demand Notice. The underwriter(s) will be selected by the Board of
Directors and shall be reasonably acceptable to a majority in interest of the Initiating Holders. In such event, the right of any Holder to include such Holder’s Registrable Securities in such registration shall be conditioned upon such
Holder’s participation in such underwriting and the inclusion of such Holder’s Registrable Securities in the underwriting to the extent provided herein. All Holders proposing to distribute their securities through such underwriting shall
(together with the Company as provided in Subsection 2.4(e)) enter into an underwriting agreement in customary form with the underwriter(s) selected for such underwriting. Notwithstanding any other provision of this Subsection 2.3, if
the managing underwriter(s) advise(s) the Initiating Holders in writing that marketing factors require a limitation on the number of shares to be underwritten, then the Initiating Holders shall so advise all Holders of Registrable Securities that
otherwise would be underwritten pursuant hereto, and the number of Registrable Securities that may be included in the underwriting shall be allocated among such Holders of Registrable Securities, including the Initiating Holders, in proportion (as
nearly as practicable) to the number of Registrable Securities owned by each Holder or in such other proportion as shall mutually be agreed to by all such selling Holders; provided, however, that the number of Registrable Securities
held by the Holders to be included in such underwriting shall not be reduced unless all other securities are first entirely excluded from the underwriting. 

(b) In connection with any offering involving an underwriting of shares of the Company’s capital stock pursuant to Subsection 2.2,
the Company shall not be required to include any of the Holders’ Registrable Securities in such underwriting unless the Holders accept the terms of the underwriting as agreed upon between the Company and its underwriters, and then only in such
quantity as the underwriters in their sole discretion determine will not jeopardize the success of the offering by the Company. If the total number of securities, including Registrable Securities, requested by stockholders to be included in such
offering exceeds the number of securities to be sold (other than by the Company) that the underwriters in their reasonable discretion determine is compatible with the success of the offering, then the Company shall be required to include in the
offering only that number of such securities, including Registrable Securities, which the underwriters and the Company in their sole discretion determine will not jeopardize the success of the offering. If the underwriters determine that less than
all of the Registrable Securities requested to be registered can be included in such offering, then the Registrable Securities that are included in such offering shall be allocated among the selling Holders in proportion (as nearly as practicable
to) the number of Registrable Securities owned by each selling Holder or in such other proportions as shall mutually be agreed to by all such selling Holders. Notwithstanding the foregoing, in no event shall (i) the number of Registrable
Securities included in the offering be reduced unless all other securities (other than securities to be sold by the Company) are first entirely excluded from the offering, or 

  
 6 

 
(ii) the number of Registrable Securities included in the offering be reduced below [***] of the total number of securities included in such offering, unless such offering is the IPO, in which
case the selling Holders may be excluded further if the underwriters make the determination described above and no other stockholder’s securities are included in such offering. For purposes of the provision in this Subsection 2.3(b)
concerning apportionment, for any selling Holder that is a partnership, limited liability company, or corporation, the partners, members, retired partners, retired members, stockholders, and Affiliates of such Holder, or the estates and Immediate
Family Members of any such partners, retired partners, members, and retired members and any trusts for the benefit of any of the foregoing Persons, shall be deemed to be a single “selling Holder,” and any pro rata reduction with respect to
such “selling Holder” shall be based upon the aggregate number of Registrable Securities owned by all Persons included in such “selling Holder,” as defined in this sentence. 

(c) For purposes of Subsection 2.1, a registration shall not be counted as “effected” if, as a result of an exercise of the
underwriter’s cutback provisions in Subsection 2.3(a), fewer than [***] of the total number of Registrable Securities that Holders have requested to be included in such registration statement are actually included. 

2.4 Obligations of the Company. Whenever required under this Section 2 to effect the registration of any Registrable
Securities, the Company shall, as expeditiously as reasonably possible: 
 (a) prepare and file with the SEC a registration statement with
respect to such Registrable Securities and use its commercially reasonable efforts to cause such registration statement to become effective and, upon the request of the Holders of a majority of the Registrable Securities registered thereunder, keep
such registration statement effective for a period of up to [***] or, if earlier, until the distribution contemplated in the registration statement has been completed; provided, however, that (i) such [***] period shall be
extended for a period of time equal to the period the Holder refrains, at the request of an underwriter of Common Stock (or other securities) of the Company, from selling any securities included in such registration, and (ii) in the case of any
registration of Registrable Securities on Form S-3 that are intended to be offered on a continuous or delayed basis, subject to compliance with applicable SEC rules, such [***] period shall be extended for up
to [***], if necessary, to keep the registration statement effective until all such Registrable Securities are sold; 
 (b) prepare and file
with the SEC such amendments and supplements to such registration statement, and the prospectus used in connection with such registration statement, as may be necessary to comply with the Securities Act in order to enable the disposition of all
securities covered by such registration statement; 
 (c) furnish to the selling Holders such numbers of copies of a prospectus, including a
preliminary prospectus, as required by the Securities Act, and such other documents as the Holders may reasonably request in order to facilitate their disposition of their Registrable Securities; 

(d) use its commercially reasonable efforts to register and qualify the securities covered by such registration statement under such other
securities or blue-sky laws of such jurisdictions as shall be reasonably requested by the selling Holders; provided that the Company shall not be required to qualify to do business or to file a general
consent to service of process in any such states or jurisdictions, unless the Company is already subject to service in such jurisdiction and except as may be required by the Securities Act; 

(e) in the event of any underwritten public offering, enter into and perform its obligations under an underwriting agreement, in usual and
customary form, with the underwriter(s) of such offering; 

  
 7 

 (f) use its commercially reasonable efforts to cause all such Registrable Securities covered
by such registration statement to be listed on a national securities exchange or trading system and each securities exchange and trading system (if any) on which similar securities issued by the Company are then listed; 

(g) provide a transfer agent and registrar for all Registrable Securities registered pursuant to this Agreement and provide a CUSIP number for
all such Registrable Securities, in each case not later than the effective date of such registration; 
 (h) promptly make available for
inspection by the selling Holders, any managing underwriter(s) participating in any disposition pursuant to such registration statement, and any attorney or accountant or other agent retained by any such underwriter or selected by the selling
Holders, all financial and other records, pertinent corporate documents, and properties of the Company, and cause the Company’s officers, directors, employees, and independent accountants to supply all information reasonably requested by any
such seller, underwriter, attorney, accountant, or agent, in each case, as necessary or advisable to verify the accuracy of the information in such registration statement and to conduct appropriate due diligence in connection therewith; 

(i) notify each selling Holder, promptly after the Company receives notice thereof, of the time when such registration statement has been
declared effective or a supplement to any prospectus forming a part of such registration statement has been filed; and 
 (j) after such
registration statement becomes effective, notify each selling Holder of any request by the SEC that the Company amend or supplement such registration statement or prospectus. 

In addition, the Company shall ensure that, at all times after any registration statement covering a public offering of securities of the
Company under the Securities Act shall have become effective, its insider trading policy shall provide that the Company’s directors may implement a trading program under Rule 10b5-1 of the Exchange Act.

 2.5 Furnish Information. It shall be a condition precedent to the obligations of the Company to take any action pursuant to this
Section 2 with respect to the Registrable Securities of any selling Holder that such Holder shall furnish to the Company such information regarding itself, the Registrable Securities held by it, and the intended method of disposition of
such securities as is reasonably required to effect the registration of such Holder’s Registrable Securities. 
 2.6 Expenses of
Registration. All expenses (other than Selling Expenses) incurred in connection with registrations, filings, or qualifications pursuant to Section 2, including all registration, filing, and qualification fees;
printers’ and accounting fees; fees and disbursements of counsel for the Company; and the reasonable fees and disbursements of one counsel for the selling Holders (“Selling Holder Counsel”), shall be borne and paid by the
Company; provided, however, that the Company shall not be required to pay for any expenses of any registration proceeding begun pursuant to Subsection 2.1 if the registration request is subsequently withdrawn at the request of
the Holders of a majority of the Registrable Securities to be registered (in which case all selling Holders shall bear such expenses pro rata based upon the number of Registrable Securities that were to be included in the withdrawn registration),
unless the Holders of a majority of the Registrable Securities agree to forfeit their right to one registration pursuant to Subsections 2.1(a) or 2.1(b), as the case may be; provided further that if, at the time of such
withdrawal, the Holders shall have learned of a material adverse change in the condition, business, or prospects of the Company from that known to the Holders at the time of their request and have withdrawn the request with reasonable promptness
after learning of such information then the Holders shall not be required to pay any of such expenses and shall not forfeit their right to one registration pursuant to Subsections 2.1(a) or 2.1(b). All Selling Expenses relating to
Registrable Securities registered pursuant to this Section 2 shall be borne and paid by the Holders pro rata on the basis of the number of Registrable Securities registered on their behalf. 

  
 8 

 2.7 Delay of Registration. No Holder shall have any right to obtain or seek an
injunction restraining or otherwise delaying any registration pursuant to this Agreement as the result of any controversy that might arise with respect to the interpretation or implementation of this Section 2. 

2.8 Indemnification. If any Registrable Securities are included in a registration statement under this Section 2: 

(a) To the extent permitted by law, the Company will indemnify and hold harmless each selling Holder, and the partners, members, officers,
directors, and stockholders of each such Holder; legal counsel, accountants and investment advisers for each such Holder; any underwriter (as defined in the Securities Act) for each such Holder; and each Person, if any, who controls such Holder or
underwriter within the meaning of the Securities Act or the Exchange Act, against any Damages, and the Company will pay to each such Holder, underwriter, controlling Person, or other aforementioned Person any legal or other expenses reasonably
incurred thereby in connection with investigating or defending any claim or proceeding from which Damages may result, as such expenses are incurred; provided, however, that the indemnity agreement contained in this Subsection
2.8(a) shall not apply to amounts paid in settlement of any such claim or proceeding if such settlement is effected without the consent of the Company, which consent shall not be unreasonably withheld, nor shall the Company be liable for any
Damages to the extent that they arise out of or are based upon actions or omissions made in reliance upon and in conformity with written information furnished by or on behalf of any such Holder, underwriter, controlling Person, or other
aforementioned Person expressly for use in connection with such registration. 
 (b) To the extent permitted by law, each selling Holder,
severally and not jointly, will indemnify and hold harmless the Company, and each of its directors, each of its officers who has signed the registration statement, each Person (if any), who controls the Company within the meaning of the Securities
Act, legal counsel and accountants for the Company, any underwriter (as defined in the Securities Act), any other Holder selling securities in such registration statement, and any controlling Person of any such underwriter or other Holder, against
any Damages, in each case only to the extent that such Damages arise out of or are based upon actions or omissions made in reliance upon and in conformity with written information furnished by or on behalf of such selling Holder expressly for use in
connection with such registration; and each such selling Holder will pay to the Company and each other aforementioned Person any legal or other expenses reasonably incurred thereby in connection with investigating or defending any claim or
proceeding from which Damages may result, as such expenses are incurred; provided, however, that the indemnity agreement contained in this Subsection 2.8(b) shall not apply to amounts paid in settlement of any such claim or proceeding if such
settlement is effected without the consent of the Holder, which consent shall not be unreasonably withheld; and provided further that in no event shall the aggregate amounts payable by any Holder by way of indemnity or contribution
under Subsections 2.8(b) and 2.8(d) exceed the proceeds from the offering received by such Holder (net of any Selling Expenses paid by such Holder), except in the case of fraud or willful misconduct by such Holder. 

(c) Promptly after receipt by an indemnified party under this Subsection 2.8 of notice of the commencement of any action (including any
governmental action) for which a party may be entitled to indemnification hereunder, such indemnified party will, if a claim in respect thereof is to be made against any indemnifying party under this Subsection 2.8, give the indemnifying
party notice of the commencement thereof. The indemnifying party shall have the right to participate in such action and, to the extent the indemnifying party so desires, participate jointly with any other indemnifying party to which notice has been
given, and to assume the defense thereof with counsel mutually satisfactory to the parties; provided, 

  
 9 

 
however, that an indemnified party (together with all other indemnified parties that may be represented without conflict by one counsel) shall have the right to retain one separate
counsel, with the fees and expenses to be paid by the indemnifying party, if representation of such indemnified party by the counsel retained by the indemnifying party would be inappropriate due to actual or potential differing interests between
such indemnified party and any other party represented by such counsel in such action. The failure to give notice to the indemnifying party within a reasonable time of the commencement of any such action shall relieve such indemnifying party of any
liability to the indemnified party under this Subsection 2.8, to the extent that such failure materially prejudices the indemnifying party’s ability to defend such action. The failure to give notice to the indemnifying party will not
relieve it of any liability that it may have to any indemnified party otherwise than under this Subsection 2.8. 
 (d) To provide for
just and equitable contribution to joint liability under the Securities Act in any case in which either: (i) any party otherwise entitled to indemnification hereunder makes a claim for indemnification pursuant to this Subsection 2.8 but
it is judicially determined (by the entry of a final judgment or decree by a court of competent jurisdiction and the expiration of time to appeal or the denial of the last right of appeal) that such indemnification may not be enforced in such case,
notwithstanding the fact that this Subsection 2.8 provides for indemnification in such case, or (ii) contribution under the Securities Act may be required on the part of any party hereto for which indemnification is provided under
this Subsection 2.8, then, and in each such case, such parties will contribute to the aggregate losses, claims, damages, liabilities, or expenses to which they may be subject (after contribution from others) in such proportion as is
appropriate to reflect the relative fault of each of the indemnifying party and the indemnified party in connection with the statements, omissions, or other actions that resulted in such loss, claim, damage, liability, or expense, as well as to
reflect any other relevant equitable considerations. The relative fault of the indemnifying party and of the indemnified party shall be determined by reference to, among other things, whether the untrue or allegedly untrue statement of a material
fact, or the omission or alleged omission of a material fact, relates to information supplied by the indemnifying party or by the indemnified party and the parties’ relative intent, knowledge, access to information, and opportunity to correct
or prevent such statement or omission; provided, however, that, in any such case (x) no Holder will be required to contribute any amount in excess of the public offering price of all such Registrable Securities offered and sold by
such Holder pursuant to such registration statement, and (y) no Person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) will be entitled to contribution from any Person who
was not guilty of such fraudulent misrepresentation; and provided further that in no event shall a Holder’s liability pursuant to this Subsection 2.8(d), when combined with the amounts paid or payable by such Holder
pursuant to Subsection 2.8(b), exceed the proceeds from the offering received by such Holder (net of any Selling Expenses paid by such Holder), except in the case of willful misconduct or fraud by such Holder. 

(e) Notwithstanding the foregoing, to the extent that the provisions on indemnification and contribution contained in the underwriting
agreement entered into in connection with the underwritten public offering are in conflict with the foregoing provisions, the provisions in the underwriting agreement shall control. 

(f) Unless otherwise superseded by an underwriting agreement entered into in connection with the underwritten public offering, the obligations
of the Company and Holders under this Subsection 2.8 shall survive the completion of any offering of Registrable Securities in a registration under this Section 2, and otherwise shall survive the termination of this Agreement.

 2.9 Reports Under Exchange Act. With a view to making available to the Holders the benefits of SEC Rule 144 and any other rule or
regulation of the SEC that may at any time permit a Holder to sell securities of the Company to the public without registration or pursuant to a registration on Form S-3, the Company shall: 

(a) make and keep available adequate current public information, as those terms are understood and defined in SEC Rule 144, at all times after
the effective date of the registration statement filed by the Company for the IPO; 

  
 10 

 (b) use commercially reasonable efforts to file with the SEC in a timely manner all reports
and other documents required of the Company under the Securities Act and the Exchange Act (at any time after the Company has become subject to such reporting requirements); and 

(c) furnish to any Holder, so long as the Holder owns any Registrable Securities, forthwith upon request (i) to the extent accurate, a
written statement by the Company that it has complied with the reporting requirements of SEC Rule 144 (at any time after [***] after the effective date of the registration statement filed by the Company for the IPO), the Securities Act, and the
Exchange Act (at any time after the Company has become subject to such reporting requirements), or that it qualifies as a registrant whose securities may be resold pursuant to Form S-3 (at any time after the
Company so qualifies); (ii) a copy of the most recent annual or quarterly report of the Company and such other reports and documents so filed by the Company; and (iii) such other information as may be reasonably requested in availing any
Holder of any rule or regulation of the SEC that permits the selling of any such securities without registration (at any time after the Company has become subject to the reporting requirements under the Exchange Act) or pursuant to Form S-3 (at any
time after the Company so qualifies to use such form). 
 2.10 Limitations on Subsequent Registration Rights. From and after the date
of this Agreement, the Company shall not, without the prior written consent of the Holders of [***] of the Registrable Securities then outstanding, enter into any agreement with any holder or prospective holder of any securities of the Company that
would (a) allow such holder or prospective holder to include such securities in any registration unless, under the terms of such agreement, such holder or prospective holder may include such securities in any such registration only to the
extent that the inclusion of such securities will not reduce the number of the Registrable Securities of the Holders that are included; or (b) allow such holder or prospective holder to initiate a demand for registration of any securities
held by such holder or prospective holder; provided that this limitation shall not apply to Registrable Securities acquired by any additional Investor that becomes a party to this Agreement in accordance with Subsection 6.9. 

2.11 “Market Stand-off”‘ Agreement. Each Holder
hereby agrees that it will not, without the prior written consent of the managing underwriter, during the period commencing on the date of the final prospectus relating to the IPO and ending on the date specified by the Company and the managing
underwriter (such period not to exceed [***]), (i) lend; offer; pledge; sell; contract to sell; sell any option or contract to purchase; purchase any option or contract to sell; grant any option, right, or warrant to purchase; or otherwise transfer
or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable (directly or indirectly) for Common Stock held immediately before the effective date of the registration statement
for the IPO or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of such securities, whether any such transaction described in clause (i) or (ii)
above is to be settled by delivery of Common Stock or other securities, in cash, or otherwise. The foregoing provisions of this Subsection 2.11 shall apply only to the IPO, shall not apply to the sale of any shares to an underwriter pursuant
to an underwriting agreement, or the transfer of any shares to any trust for the direct or indirect benefit of the Holder or the immediate family of the Holder, provided that the trustee of the trust agrees to be bound in writing by the restrictions
set forth herein, and provided further that any such transfer shall not involve a disposition for value, and shall be applicable to the Holders only if all officers and directors are subject to the same restrictions and the Company obtains a similar
agreement from all stockholders individually owning more than [***] of the Company’s outstanding Common Stock (after giving effect to conversion into Common Stock of all outstanding Preferred Stock). [***] The underwriters in connection with
such registration are intended third-party beneficiaries of this Subsection 2.11 and shall have the right, 

  
 11 

 
power and authority to enforce the provisions hereof as though they were a party hereto. Each Holder further agrees to execute such agreements as may be reasonably requested by the underwriters
in connection with such registration that are consistent with this Subsection 2.11 or that are necessary to give further effect thereto. [***]. 

2.12 Restrictions on Transfer. 

(a) The Preferred Stock and the Registrable Securities shall not be sold, pledged, or otherwise transferred, and the Company shall not
recognize and shall issue stop-transfer instructions to its transfer agent with respect to any such sale, pledge, or transfer, except upon the conditions specified in this Agreement, which conditions are intended to ensure compliance with the
provisions of the Securities Act. A transferring Holder will cause any proposed purchaser, pledgee, or transferee of the Preferred Stock and the Registrable Securities held by such Holder to agree to take and hold such securities subject to the
provisions and upon the conditions specified in this Agreement. Notwithstanding the foregoing, the Company shall not require any transferee of shares pursuant to an effective registration statement or, following the IPO, SEC Rule 144 to be bound by
the terms of this Agreement. 
 (b) Each certificate, instrument, or book entry representing (i) the Preferred Stock, (ii) the
Registrable Securities, and (iii) any other securities issued in respect of the securities referenced in clauses (i) and (ii), upon any stock split, stock dividend, recapitalization, merger, consolidation, or similar event, shall
(unless otherwise permitted by the provisions of Subsection 2.12(c)) be notated with a legend substantially in the following form: 

THE SECURITIES REPRESENTED HEREBY HAVE BEEN ACQUIRED FOR INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. SUCH SHARES
MAY NOT BE SOLD, PLEDGED, OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR A VALID EXEMPTION FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS OF SAID ACT. 

THE SECURITIES REPRESENTED HEREBY MAY BE TRANSFERRED ONLY IN ACCORDANCE WITH THE TERMS OF AN AGREEMENT BETWEEN THE COMPANY AND THE
STOCKHOLDER, A COPY OF WHICH IS ON FILE WITH THE SECRETARY OF THE COMPANY. 
 The Holders consent to the Company making a notation in its
records and giving instructions to any transfer agent of the Restricted Securities in order to implement the restrictions on transfer set forth in this Subsection 2.12. 

(c) The holder of such Restricted Securities, by acceptance of ownership thereof, agrees to comply in all respects with the provisions of this
Section 2. Before any proposed sale, pledge, or transfer of any Restricted Securities, unless there is in effect a registration statement under the Securities Act covering the proposed transaction or, following the IPO, the transfer is made
pursuant to SEC Rule 144, the Holder thereof shall give notice to the Company of such Holder’s intention to effect such sale, pledge, or transfer. Each such notice shall describe the manner and circumstances of the proposed sale, pledge, or
transfer in sufficient detail and, if reasonably requested by the Company, shall be accompanied at such Holder’s expense by either (i) a written opinion of legal counsel who shall, and whose legal opinion shall, be reasonably
satisfactory to the Company, addressed to the Company, to the effect that the proposed transaction may be effected without registration under the Securities Act; (ii) a “no action” letter from the SEC to the effect that the proposed
sale, pledge, or transfer of such Restricted Securities without registration will not result in a recommendation by the staff of the SEC that action be taken with respect thereto; or 

  
 12 

 
(iii) any other evidence reasonably satisfactory to counsel to the Company to the effect that the proposed sale, pledge, or transfer of the Restricted Securities may be effected without
registration under the Securities Act, whereupon the Holder of such Restricted Securities shall be entitled to sell, pledge, or transfer such Restricted Securities in accordance with the terms of the notice given by the Holder to the Company. The
Company will not require such a legal opinion or “no action” letter (x) in any transaction in compliance with SEC Rule 144; or (y) in any transaction in which such Holder distributes Restricted Securities to an Affiliate of
such Holder for no consideration; provided that, other than in connection with a transaction in compliance with SEC Rule 144 following the IPO, each transferee agrees in writing to be subject to the terms of this Subsection 2.12. Each
certificate, instrument, or book entry representing the Restricted Securities transferred as above provided shall be notated with, except if such transfer is made pursuant to SEC Rule 144 or pursuant to an effective registration statement, the
appropriate restrictive legend set forth in Subsection 2.12(b), except that such certificate instrument, or book entry shall not be notated with such restrictive legend if, in the opinion of counsel for such Holder and the Company, such
legend is not required in order to establish compliance with any provisions of the Securities Act. 
 2.13 Termination of Registration
Rights. The right of any Holder to request registration or inclusion of Registrable Securities in any registration pursuant to Subsections 2.1 or 2.2 shall terminate upon the earliest to occur of: 

[***] 
 3. Information and Observer
Rights. 
 3.1 Delivery of Financial Statements. The Company shall deliver to each Major Investor, provided that the
Board of Directors has not reasonably determined that such Major Investor is a Competitor: 
 (a) starting with the fiscal year ending
December 31, 2019, as soon as practicable, but in any event within [***] after the end of each fiscal year of the Company and starting with the fiscal year ending December 31, 2020, as soon as practicable but in any event
within [***] after the end of each fiscal year of the Company (i) a balance sheet as of the end of such year, (ii) statements of income and of cash flows for such year, and a comparison between (x) the actual
amounts as of and for such fiscal year and (y) the comparable amounts for the prior year and as included in the Budget (as defined in Subsection 3.1(d)) for such year, with an explanation of any material differences between such
amounts and a schedule as to the sources and applications of funds for such year, and (iii) a statement of stockholders’ equity as of the end of such year, all such financial statements audited and certified by independent public
accountants of regionally recognized standing selected by the Company; 
 (b) as soon as practicable, but in any event within [***] after
the end of each of the first three (3) quarters of each fiscal year of the Company, unaudited statements of income and cash flows for such fiscal quarter, and an unaudited balance sheet and a statement of stockholders’ equity as of
the end of such fiscal quarter, all prepared in accordance with GAAP (except that such financial statements may (i) be subject to normal year-end audit adjustments; and (ii) not contain all notes thereto that may be required in
accordance with GAAP); 
 (c) as soon as practicable, but in any event within [***] after the end of each of the first three
(3) quarters of each fiscal year of the Company, a statement showing the number of shares of each class and series of capital stock and securities convertible into or exercisable for shares of capital stock outstanding at the end of the
period, the Common Stock issuable upon conversion or exercise of any outstanding securities convertible or exercisable for Common Stock and the exchange ratio or exercise price applicable thereto, and the number of shares of issued stock options and
stock options not yet issued but reserved for issuance, if any, all in sufficient detail as to permit the Major Investors to calculate their respective percentage equity ownership in the Company, and certified by the chief financial officer or chief
executive officer of the Company as being true, complete, and correct; 

  
 13 

 (d) as soon as practicable, but in any event [***] before the end of each fiscal year, a
budget and business plan for the next fiscal year (collectively, the “Budget”), approved by the Board of Directors (including the Requisite Directors) and prepared on a monthly basis, including balance sheets, income statements, and
statements of cash flow for such months and, promptly after prepared, any other budgets or revised budgets prepared by the Company; 
 (e)
with respect to the financial statements called for in Subsection 3.1(a), and Subsection 3.1(b), an instrument executed by the chief financial officer and chief executive officer of the Company certifying that such financial statements
were prepared in accordance with GAAP consistently applied with prior practice for earlier periods (except as otherwise set forth in Subsection 3.1(b)) and fairly present the financial condition of the Company and its results of operation for
the periods specified therein; and 
 (f) such other information relating to the financial condition, business, prospects, or corporate
affairs of the Company as any Major Investor may from time to time reasonably request; provided, however, that the Company shall not be obligated under this Subsection 3.1 to provide information (i) that the Company
reasonably determines in good faith to be a trade secret or confidential information (unless covered by an enforceable confidentiality agreement, in a form acceptable to the Company); or (ii) the disclosure of which would adversely
affect the attorney-client privilege between the Company and its counsel. 
 If, for any period, the Company has any subsidiary whose
accounts are consolidated with those of the Company, then in respect of such period the financial statements delivered pursuant to the foregoing sections shall be the consolidated and consolidating financial statements of the Company and all such
consolidated subsidiaries. 
 Notwithstanding anything else in this Subsection 3.1 to the contrary, the Company may cease providing
the information set forth in this Subsection 3.1 during the period starting with the date thirty (30) days before the Company’s good-faith estimate of the date of filing of a registration statement if it reasonably concludes it must
do so to comply with the SEC rules applicable to such registration statement and related offering; provided that the Company’s covenants under this Subsection 3.1 shall be reinstated at such time as the Company is no longer actively
employing its commercially reasonable efforts to cause such registration statement to become effective. 
 3.2 Inspection. The
Company shall permit each Major Investor (provided that the Board of Directors has not reasonably determined that such Major Investor is a Competitor), at such Major Investor’s expense, to visit and inspect the Company’s properties;
examine its books of account and records; and discuss the Company’s affairs, finances, and accounts with its officers, during normal business hours of the Company as may be reasonably requested by the Major Investor; provided,
however, that the Company shall not be obligated pursuant to this Subsection 3.2 to provide access to any information that it reasonably and in good faith considers to be a trade secret or confidential information (unless covered by an
enforceable confidentiality agreement, in form acceptable to the Company) or the disclosure of which would adversely affect the attorney-client privilege between the Company and its counsel. 

3.3 Observer Rights. 

[***] 

  
 14 

 (c) As long as PureTech owns not less than [***] shares of Series A-2 Preferred Stock, the Company shall invite a representative of PureTech, which individual shall initially be Bharatt Chowrira to attend all meetings of the Board of Directors in a nonvoting observer capacity and,
in this respect, shall give such representative copies of all notices, minutes, consents, and other materials that it provides to its directors at the same time and in the same manner as provided to such directors; provided, however, that such
representative shall agree to hold in confidence and trust and to act in a fiduciary manner with respect to all information so provided; and provided further, that the Company reserves the right to withhold any information and to
exclude such representative from any meeting or portion thereof if access to such information or attendance at such meeting could adversely affect the attorney-client privilege between the Company and its counsel or result in disclosure of trade
secrets or a conflict of interest, or if such Investor or its representative is a Competitor of the Company; 
 [***] 

Any person other than the persons initially specified in Subsections 3.3(a)-(e) that is invited to represent an Investor in a nonvoting observer
capacity pursuant to this Section 3.3 shall be mutually agreeable to the applicable appointing Investor and the Requisite Directors then in office. 

3.4 Termination of Information and Observer Rights. The covenants set forth in Subsection 3.1, Subsection
3.2 and Subsection 3.3 shall terminate and be of no further force or effect (a) immediately before the consummation of the IPO, or (b) when the Company first becomes subject to the periodic reporting requirements
of Section 12(g) or 15(d) of the Exchange Act, or (c) upon the closing of a Deemed Liquidation Event, as such term is defined in the Certificate of Incorporation, whichever event occurs first; provided, however,
that in the event the covenants set forth in Subsection 3.1 terminate upon a Deemed Liquidation Event, if the consideration received by the Investors in such Deemed Liquidation Event is not solely in the form of cash and/or publicly traded
securities, the Company will use commercially reasonable efforts to ensure that the Investors receive financial information from the acquiring company or other successor to the Company comparable to those set forth in Subsection 3.1.

 3.5 Confidentiality. Each Investor agrees that such Investor will, and shall cause any Affiliate thereof to, keep confidential,
not disclose, divulge, or use for any purpose (other than to monitor its investment in the Company and, in the case of Columbia, its rights under that certain Exclusive License Agreement and that certain Restricted Stock Agreement, each dated
April 28, 2016, by and between Columbia and the Company, as each may be amended from time to time) any confidential information obtained from the Company pursuant to the terms of this Agreement (including notice of the Company’s intention
to file a registration statement), unless such confidential information (a) is known or becomes known to the public in general (other than as a result of a breach of this Subsection 3.5 by such Investor), (b) is or has been independently
developed or conceived by such Investor without use of the Company’s confidential information, or (c) is or has been made known or disclosed to such Investor by a third party without a breach of any obligation of confidentiality such third
party may have to the Company; provided, however, that an Investor may disclose confidential information (i) to its attorneys, accountants, consultants, and other professionals to the extent necessary to obtain their services in connection with
monitoring its investment in the Company (and, in the case of Columbia, for the purpsoes described above); (ii) to any prospective purchaser of any Registrable Securities from such Investor, if such prospective purchaser agrees to be bound by the
provisions of this Subsection 3.5; (iii) to any existing or prospective Affiliate, partner, member, stockholder, or wholly owned subsidiary of such Investor in the ordinary course of business, provided that such Investor informs such Person
that such information is confidential, directs such Person to maintain the confidentiality of such information and directs such person to use such information only in compliance with the use restrictions set forth in this Subsection 3.5; or
(iv) as may otherwise be required by law, regulation, rule, court order or subpoena, provided that such Investor promptly notifies the Company of such disclosure and takes reasonable steps to minimize the extent of any such required
disclosure. 

  
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 4. Rights to Future Stock Issuances. 

4.1 Right of First Offer. Subject to the terms and conditions of this Subsection 4.1 and applicable securities laws, if the
Company proposes to offer or sell any New Securities, the Company shall first offer such New Securities to each Major Investor. A Major Investor shall be entitled to apportion the right of first offer hereby granted to it in such proportions as it
deems appropriate, among (i) itself, (ii) its Affiliates, (iii) in the case of [***] and (iv) its beneficial interest holders, such as limited partners, members or any other Person having “beneficial
ownership,” as such term is defined in Rule 13d-3 promulgated under the Exchange Act, of such Major Investor (“Investor Beneficial Owners”); provided that each such Affiliate or
Investor Beneficial Owner (x) is not a Competitor or FOIA Party, unless such party’s purchase of New Securities is otherwise consented to by the Board of Directors, (y) agrees to enter into this Agreement and each of the
Voting Agreement and Right of First Refusal and Co-Sale Agreement of even date herewith among the Company, the Investors and the other parties named therein, as an “Investor” under each such agreement (provided that any Competitor
or FOIA Party shall not be entitled to any rights as a Major Investor under Subsections 3.1, 3.2 and 4.1 hereof), and (z) agrees to purchase at least such number of New Securities as are allocable hereunder to
the Major Investor holding the fewest number of Preferred Stock and any other Derivative Securities. 
 (a) The Company shall give notice
(the “Offer Notice”) to each Major Investor, stating (i) its bona fide intention to offer such New Securities, (ii) the number of such New Securities to be offered, and (iii) the price and terms,
if any, upon which it proposes to offer such New Securities. 
 (b) By notification to the Company within [***] after the Offer Notice is
given, each Major Investor may elect to purchase or otherwise acquire, at the price and on the terms specified in the Offer Notice, up to that portion of such New Securities which equals the proportion that the Common Stock then held by such Major
Investor (including all shares of Common Stock then issuable (directly or indirectly) upon conversion and/or exercise, as applicable, of the Preferred Stock and any other Derivative Securities then held by such Major Investor but excluding any
Common Stock issued upon conversion of the Series B Preferred Stock pursuant to the “Special Mandatory Conversion” provisions of the Certificate of Incorporation) bears to the total Common Stock of the Company then outstanding (assuming
full conversion and/or exercise, as applicable, of all Preferred Stock and any other Derivative Securities then outstanding). At the expiration of such [***] period, the Company shall promptly notify each Major Investor that elects to purchase or
acquire all the shares available to it (each, a “Fully Exercising Investor”) of any other Major Investor’s failure to do likewise. During the [***] period commencing after the Company has given such notice, each Fully
Exercising Investor may, by giving notice to the Company, elect to purchase or acquire, in addition to the number of shares specified above, up to that portion of the New Securities for which Major Investors were entitled to subscribe but that were
not subscribed for by the Major Investors which is equal to the proportion that the Common Stock issued and held, or issuable (directly or indirectly) upon conversion and/or exercise, as applicable, of Preferred Stock and any other Derivative
Securities then held by such Fully Exercising Investor (excluding any Common Stock issued upon conversion of the Series B Preferred Stock pursuant to the “Special Mandatory Conversion” provisions of the Certificate of Incorporation) bears
to the Common Stock issued and held, or issuable (directly or indirectly) upon conversion and/or exercise, as applicable, of the Preferred Stock and any other Derivative Securities then held, by all Fully Exercising Investors who wish to purchase
such unsubscribed shares. The closing of any sale pursuant to this Subsection 4.1(b) shall occur within the later of [***] of the date that the Offer Notice is given and the date of initial sale of New Securities pursuant to Subsection
4.1(c). 

  
 16 

 (c) If all New Securities referred to in the Offer Notice are not elected to be purchased or
acquired as provided in Subsection 4.1(b), the Company may, during the [***] period following the expiration of the periods provided in Subsection 4.1(b), offer and sell the remaining unsubscribed portion of such New Securities to any
Person or Persons at a price not less than, and upon terms no more favorable to the offeree than, those specified in the Offer Notice. If the Company does not enter into an agreement for the sale of the New Securities within such period, or if such
agreement is not consummated within [***] of the execution thereof, the right provided hereunder shall be deemed to be revived and such New Securities shall not be offered unless first reoffered to the Major Investors in accordance with this
Subsection 4.1. 
 (d) The right of first offer in this Subsection 4.1 shall not be applicable to (i) Exempted
Securities (as defined in the Certificate of Incorporation); (ii) shares of Common Stock issued in the IPO; (iii) the issuance of Series B Preferred Stock to Additional Purchasers pursuant to Subsection 1.3 of the Purchase
Agreement; and (iv) the issuance of Series B Preferred Stock in the Milestone Closing (as defined in the Purchase Agreement). 

4.2 Termination. The covenants set forth in Subsection 4.1 shall terminate and be of no further force or effect
(a) immediately before the consummation of the IPO, (b) when the Company first becomes subject to the periodic reporting requirements of Section 12(g) or 15(d) of the Exchange Act, or (c) upon the
closing of a Deemed Liquidation Event, as such term is defined in the Certificate of Incorporation, whichever event occurs first. 
 5.
Additional Covenants. 
 5.1 Insurance. The Company shall obtain, within [***] of the date hereof, from financially
sound and reputable insurers Directors and Officers liability insurance in an amount and on terms and conditions satisfactory to the Board of Directors, and will use commercially reasonable efforts to cause such insurance policies to be maintained
until such time as the Board of Directors determines that such insurance should be discontinued. The policy shall not be cancelable by the Company without prior approval by the Board of Directors, including the Requisite Directors and holders of
[***] of the Preferred Stock. Notwithstanding any other provision of this Section 5.1 to the contrary, for so long as [***] is serving on the Board of Directors, the Company shall not cease to maintain a Directors and
Officers liability insurance policy in an amount of at least [***] unless approved by [***], and the Company shall annually, within one hundred [***] after the end of each fiscal year of the Company, deliver to the designators of [***] under the
Voting Agreement a certification that such a Directors and Officers liability insurance policy remains in effect. 
 5.2 Employee
Agreements. The Company will cause (a) each Person now or hereafter employed by it or by any subsidiary (or engaged by the Company or any subsidiary as a consultant/independent contractor) with access to confidential information
and/or trade secrets to enter into a nondisclosure and proprietary rights assignment agreement; and (b) subject to applicable law, each Key Employee to enter into a [***] nonsolicitation agreement, substantially in the form approved by
the Board of Directors. In addition, the Company shall not amend, modify, terminate, waive, or otherwise alter, in whole or in part, any of the above-referenced agreements or any restricted stock agreement between the Company and any employee,
without the consent of the Requisite Directors. 
 5.3 Employee Stock. Unless otherwise approved by the Board of Directors, including
the Requisite Directors, all future employees and consultants of the Company who purchase, receive options to purchase, or receive awards of shares of the Company’s capital stock after the date hereof shall be required to execute
restricted stock or option agreements, as applicable, providing for (a) vesting of shares over a [***] period, with the first [***] of such shares vesting following [***] of continued employment

  
 17 

 
or service, and the remaining shares vesting in equal [***] installments over the following [***], and (b) a market stand-off provision at
least as restrictive as that in Subsection 2.11. Without the prior approval by the Board of Directors, including the Requsite Directors, the Company shall not amend, modify, terminate, waive or otherwise alter, in whole or in part, any stock
purchase, stock restriction or option agreement with any existing employee or service provider if such amendment would cause it to be inconsistent with this Subsection 5.3. In addition, unless otherwise approved by the Board of Directors,
including the Requisite Directors, the Company shall retain (and not waive) a “right of first refusal” on employee transfers until the Company’s IPO and shall have the right to repurchase unvested shares at cost upon termination of
employment of a holder of restricted stock. 
 5.4 Matters Requiring Investor Director Approval. So long as [***] is entitled to
designate a Preferred Director, the Company hereby covenants and agrees with each of the Investors that it shall not, without approval of the Board of Directors, which approval must include the affirmative vote of the Requisite Directors: 

[***] 
 5.5 Board Matters.
Unless otherwise determined by the vote of a majority of the directors then in office, including the Requisite Directors, the Board of Directors shall meet at least quarterly in accordance with an agreed-upon schedule. The Company shall reimburse
the nonemployee directors and observers for all reasonable out-of-pocket travel expenses incurred (consistent with the Company’s travel policy) in connection with attending meetings of the Board of Directors. Each Preferred Director shall be
entitled in such person’s discretion to be a member of any committee of the Board of Directors. 
 5.6 Successor
Indemnification. If the Company or any of its successors or assignees consolidates with or merges into any other Person and is not the continuing or surviving corporation or entity of such consolidation or merger, then to the extent necessary,
proper provision shall be made so that the successors and assignees of the Company assume the obligations of the Company with respect to indemnification of members of the Board of Directors as in effect immediately before such transaction, whether
such obligations are contained in the Company’s Bylaws, the Certificate of Incorporation, or elsewhere, as the case may be. 
 5.7
Expenses of Counsel. In the event of a transaction which is a Sale of the Company (as defined in the Voting Agreement of even date herewith among the Investors, the Company and the other parties named therein), the reasonable fees and
disbursements of one counsel for the Major Investors (“Investor Counsel”), in their capacities as stockholders, shall be borne and paid by the Company. At the outset of considering a transaction which, if consummated would
constitute a Sale of the Company, the Company shall obtain the ability to share with the Investor Counsel (and such counsel’s clients) and shall share the confidential information (including, without limitation, the initial and all subsequent
drafts of memoranda of understanding, letters of intent and other transaction documents and related noncompete, employment, consulting and other compensation agreements and plans) pertaining to and memorializing any of the transactions which,
individually or when aggregated with others would constitute the Sale of the Company. The Company shall be obligated to share (and cause the Company’s counsel and investment bankers to share) such materials when distributed to the
Company’s executives and/or any one or more of the other parties to such transaction(s). In the event that Investor Counsel deems it appropriate, in its reasonable discretion, to enter into a joint defense agreement or other arrangement to
enhance the ability of the parties to protect their communications and other reviewed materials under the attorney client privilege, the Company shall, and shall direct its counsel to, execute and deliver to Investor Counsel and its clients such an
agreement in form and substance reasonably acceptable to Investor Counsel. In the event that one or more of the other party or parties to such transactions require the clients of Investor Counsel to enter into a confidentiality agreement and/or
joint defense agreement in order to receive such information, then the Company shall share whatever information can be shared without entry into such agreement and shall, at the same time, in good faith work expeditiously to enable Investor Counsel
and its clients to negotiate and enter into the appropriate agreement(s) without undue burden to the clients of Investor Counsel. 

  
 18 

 5.8 Indemnification Matters. The Company hereby acknowledges that one
(1) or more of the directors nominated to serve on the Board of Directors by the Investors (each an “Investor Director”) may have certain rights to indemnification, advancement of expenses and/or insurance provided by
one or more of the Investors and certain of their Affiliates (collectively, the “Investor Indemnitors”). The Company hereby agrees (a) that it is the indemnitor of first resort (i.e., its obligations to any such Investor
Director are primary and any obligation of the Investor Indemnitors to advance expenses or to provide indemnification for the same expenses or liabilities incurred by such Investor Director are secondary), (b) that it shall be required
to advance the full amount of expenses incurred by such Investor Director and shall be liable for the full amount of all expenses, judgments, penalties, fines and amounts paid in settlement by or on behalf of any such Investor Director to the extent
legally permitted and as required by the Company’s Certificate of Incorporation or Bylaws of the Company (or any agreement between the Company and such Investor Director), without regard to any rights such Investor Director may have against the
Investor Indemnitors, and, (c) that it irrevocably waives, relinquishes and releases the Investor Indemnitors from any and all claims against the Investor Indemnitors for contribution, subrogation or any other recovery of any kind in
respect thereof. The Company further agrees that no advancement or payment by the Investor Indemnitors on behalf of any such Investor Director with respect to any claim for which such Investor Director has sought indemnification from the Company
shall affect the foregoing and the Investor Indemnitors shall have a right of contribution and/or be subrogated to the extent of such advancement or payment to all of the rights of recovery of such Investor Director against the Company. The Investor
Directors and the Investor Indemnitors are intended third-party beneficiaries of this Subsection 5.8 and shall have the right, power and authority to enforce the provisions of this Subsection 5.8
as though they were a party to this Agreement. 
 5.9 Right to Conduct Activities. [***] 

5.10 Covered Investment Rights. Investor does not and shall not permit any “foreign person” (as defined in the DPA (as
defined below)) affiliated with Investor, whether affiliated as a limited partner or otherwise, to obtain through Investor any of the following with respect to the Company within the meaning of the Defense Production Act of 1950, including all
implementing regulations thereof (the “DPA”): (i) “control” of the Company; (ii) access to any “material nonpublic technical information” in the possession of the Company; (iii) membership or observer
rights on, or the right to nominate an individual to a position on, the board of directors or equivalent governing body of the Company; or (iv) any “involvement” (other than through voting of shares) in “substantive
decision-making” of the Company regarding: (a) the use, development, acquisition, safekeeping, or release of “sensitive personal data” of U.S. citizens maintained or collected by the Company; (b) the use, development,
acquisition, or release of “critical technologies”, or (c) the management, operation, manufacture, or supply of “covered investment critical infrastructure.” 

5.11 Covered Company Rights. Notwithstanding the foregoing or anything herein or elsewhere to the contrary, in no event shall the
Company be obligated or permitted to afford to any Investor that is a “foreign person” within the meaning of the DPA (i) “control” of the Company; (ii) access to any “material nonpublic technical information” in
the possession of the Company; (iii) membership or observer rights on, or the right to nominate an individual to a position on, the board of directors or equivalent governing body of the Company; or (iv) any “involvement” (other
than through voting of shares) in “substantive decision-making” of the Company regarding: (a) the use, development, acquisition, safekeeping, or release of “sensitive personal data” of U.S. citizens maintained or collected
by the Company; (b) the use, development, acquisition, or release of “critical technologies”, or (c) the management, operation, manufacture, or supply of “covered investment critical infrastructure.” 

  
 19 

 5.12 Cybersecurity. The Company shall, within 180 days following the Initial Closing
(as defined in the Purchase Agreement), (a) identify its sensitive data and information, and restrict access (through physical and electronic controls) to those individuals who have a need to access it and (b) design and begin
implementing cybersecurity solution(s) (“Cybersecurity Solutions”) designed to protect its technology and systems (including servers, laptops, desktops, cloud, containers, virtual environments and data centers) and all
data contained in such systems, which such Cybersecurity Solutions will be installed and fully implemented prior to the one year anniversary of the Initial Closing. The Company shall use commercially reasonable efforts to ensure that the
Cybersecurity Solutions (x) are up-to-date and include industry-standard protections (e.g., antivirus, endpoint detection and response and threat hunting),
and (y) require the vendors to notify the Company of any security incidents posing a risk to the Company’s information (regardless of whether information was actually compromised). The Company shall evaluate on a regular
basis whether the Cybersecurity Solutions should be updated to ensure continued effectiveness and industry-standard protections. The Company shall also educate its employees about the proper use and storage of sensitive information, including
regular training as determined reasonably necessary by the Company or its Board of Directors. 
 5.13 Termination of Covenants. The
covenants set forth in this Section 5, except for Subsections 5.6, 5.7 and 5.8, shall terminate and be of no further force or effect (a) immediately before the
consummation of the IPO, (b) when the Company first becomes subject to the periodic reporting requirements of Section 12(g) or 15(d) of the Exchange Act, or (c) upon a Deemed Liquidation Event, as such term is
defined in the Certificate of Incorporation, whichever event occurs first. 
 6. Miscellaneous. 

6.1 Successors and Assigns. The rights under this Agreement may be assigned (but only with all related obligations) by a Holder to a
transferee of Registrable Securities that (a) is an Affiliate of a Holder; (b) is a Holder’s Immediate Family Member or trust for the benefit of an individual Holder or one or more of such Holder’s Immediate Family
Members; or (c) after such transfer, holds at least [***] shares of Registrable Securities (subject to appropriate adjustment for stock splits, stock dividends, combinations, and other recapitalizations); provided, however,
that (x) the Company is, within a reasonable time after such transfer, furnished with written notice of the name and address of such transferee and the Registrable Securities with respect to which such rights are being transferred; and
(y) such transferee agrees in a written instrument delivered to the Company to be bound by and subject to the terms and conditions of this Agreement, including the provisions of Subsection 2.11. For the purposes of determining the
number of shares of Registrable Securities held by a transferee, the holdings of a transferee (1) that is an Affiliate or stockholder of a Holder; (2) who is a Holder’s Immediate Family Member; or (3) that is
a trust for the benefit of an individual Holder or such Holder’s Immediate Family Member shall be aggregated together and with those of the transferring Holder; provided further that all transferees who would not qualify
individually for assignment of rights shall, as a condition to the applicable transfer, establish a single attorney-in-fact for the purpose of exercising any rights,
receiving notices, or taking any action under this Agreement. The terms and conditions of this Agreement inure to the benefit of and are binding upon the respective successors and permitted assignees 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 permitted assignees any rights, remedies, obligations or liabilities under or by reason of this Agreement, except as expressly
provided herein. 

  
 20 

 6.2 Governing Law. This Agreement shall be governed by the internal law of the State
of Delaware, without regard to conflict of law principles that would result in the application of any law other than the law of the State of Delaware. 

6.3 Counterparts. This Agreement may be executed in two (2) or more counterparts, each of which shall be deemed an
original, but all of which together shall constitute one and the same instrument. Counterparts may be delivered via facsimile, electronic mail (including pdf or any electronic signature complying with the U.S. federal ESIGN Act of 2000, e.g.,
www.docusign.com) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes. 

6.4 Titles and Subtitles. The titles and subtitles used in this Agreement are for convenience only and are not to be considered in
construing or interpreting this Agreement. 
 6.5 Notices. 

(a) All notices and other communications given or made pursuant to this Agreement shall be in writing and shall be deemed effectively given
upon the earlier of actual receipt or (i) personal delivery to the party to be notified; (ii) when sent, if sent by electronic mail or facsimile during the recipient’s normal business hours, and if not sent during normal
business hours, then on the recipient’s next business day; (iii) five (5) days after having been sent by registered or certified mail, return receipt requested, postage prepaid; or (iv) one (1) business day after the
business day of deposit with a nationally recognized overnight courier, freight prepaid, specifying next-day delivery, with written verification of receipt. All communications shall be sent to the respective
parties at their addresses as set forth on Schedule A or Schedule B (as applicable) hereto, or to the principal office of the Company and to the attention of the Chief Executive Officer, in the case of the Company, or to such
email address, facsimile number, or address as subsequently modified by written notice given in accordance with this Subsection 6.5. If notice is given to the Company, a copy shall also be sent to [***] and if notice is given to
Stockholders, a copy shall also be given to [***]. 
 (b) Consent to Electronic Notice. Each Investor consents to the delivery of any
stockholder notice pursuant to the Delaware General Corporation Law (the “DGCL”), as amended or superseded from time to time, by electronic transmission pursuant to Section 232 of the DGCL (or any successor thereto) at
the electronic mail address or the facsimile number set forth below such Investor’s name on the Schedules hereto, as updated from time to time by notice to the Company, or as on the books of the Company. To the extent that any notice given by
means of electronic transmission is returned or undeliverable for any reason, the foregoing consent shall be deemed to have been revoked until a new or corrected electronic mail address has been provided, and such attempted Electronic Notice shall
be ineffective and deemed to not have been given. Each Investor agrees to promptly notify the Company of any change in such stockholder’s electronic mail address, and that failure to do so shall not affect the foregoing. 

6.6 Amendments and Waivers. Any term of this Agreement may be amended, modified or terminated and the observance of any term of this
Agreement may be waived (either generally or in a particular instance, and either retroactively or prospectively) only with the written consent of the Company and the holders of [***] Common Stock issuable or issued upon conversion of [***],
excluding any Common Stock issued upon conversion of the [***] pursuant to the “Special Mandatory Conversion” provisions of the Certificate of Incorporation; provided that the Company may in its sole discretion waive compliance with
Subsection 2.12(c) (and the Company’s failure to object promptly in writing after notification of a proposed assignment allegedly in violation of Subsection 2.12(c) shall be deemed to be a waiver); and provided further that any
provision hereof may be waived by any waiving party on such party’s 

  
 21 

 
own behalf, without the consent of any other party. Notwithstanding the foregoing, (a) [***] and (b) Subsections 3.1 and 3.2, Section 4 and any other section
of this Agreement applicable to the Major Investors (including this clause (b) of this Subsection 6.6) may not be amended, modified, terminated or waived without the written consent of the holders of at least a majority of the
Registrable Securities then outstanding and held by the Major Investors. None of Subsection 1.5, Subsection 3.3, Subsection 5.4 or Subsection 5.9 of this Agreement may be amended, modified, terminated or waived in respect
of any Investor without the written consent of such Investor. Subsection 1.20 may not be amended, modified, terminated or waived without the written consent of each affected Investor. Section 4.1(iii) may not be amended, modified,
terminated or waived without the written consent of Columbia and Subsection 4.1(b) may not be amended, modified, terminated or waived in a manner that adversely impacts any Investor in a manner that is disproportionate to the adverse impact
on other Investors. Notwithstanding the foregoing, Schedule A hereto may be amended by the Company from time to time to add transferees of any Registrable Securities in compliance with the terms of this Agreement without the consent of the other
parties; and Schedule A hereto may also be amended by the Company after the date of this Agreement without the consent of the other parties to add information regarding any additional Investor who becomes a party to this Agreement in accordance with
Subsection 6.9. The Company shall give prompt notice of any amendment, modification or termination hereof or waiver hereunder to any party hereto that did not consent in writing to such amendment, modification, termination, or waiver. Any
amendment, modification, termination, or waiver effected in accordance with this Subsection 6.6 shall be binding on all parties hereto, regardless of whether any such party has consented thereto. No waivers of or exceptions to any term,
condition, or provision of this Agreement, in any one or more instances, shall be deemed to be or construed as a further or continuing waiver of any such term, condition, or provision. 

6.7 Severability. In case any one or more of the provisions contained in this Agreement is for any reason held to be invalid, illegal
or unenforceable in any respect, such invalidity, illegality, or unenforceability shall not affect any other provision of this Agreement, and such invalid, illegal, or unenforceable provision shall be reformed and construed so that it will be valid,
legal, and enforceable to the maximum extent permitted by law. 
 6.8 Aggregation of Stock. All shares of Registrable Securities held
or acquired by Affiliates shall be aggregated together for the purpose of determining the availability of any rights under this Agreement and such Affiliated persons may apportion such rights as among themselves in any manner they deem appropriate.

 6.9 Additional Investors. Notwithstanding anything to the contrary contained herein, if the Company issues additional shares of
the Company’s Series B Preferred Stock after the date hereof, whether pursuant to the Purchase Agreement or otherwise, any purchaser of such shares of Series B Preferred Stock may become a party to this Agreement by executing and delivering an
additional counterpart signature page to this Agreement, and thereafter shall be deemed an “Investor” for all purposes hereunder. No action or consent by the Investors shall be required for such joinder to this Agreement by such additional
Investor, so long as such additional Investor has agreed in writing to be bound by all of the obligations as an “Investor” hereunder. 

6.10 Entire Agreement. Upon effectiveness of this Agreement, the Prior Agreement shall be deemed to be amended and restated and
superseded and replaced in its entirety by this Agreement and shall be of no further force or effect. This Agreement (including any Schedules and Exhibits hereto) constitutes the full and entire understanding and agreement among 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 is expressly canceled. 

  
 22 

 6.11 Dispute Resolution. The parties (a) hereby irrevocably and
unconditionally submit to the jurisdiction of the state courts of the State of Delaware and to the jurisdiction of the United States District Court for the District 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 state courts of the State of Delaware or the United States District Court for the
District 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. 
 WAIVER OF JURY TRIAL: EACH PARTY HEREBY WAIVES ITS RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF
ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT, THE OTHER TRANSACTION DOCUMENTS, THE SECURITIES OR THE SUBJECT MATTER HEREOF OR THEREOF. THE SCOPE OF THIS WAIVER IS INTENDED TO BE ALL-ENCOMPASSING OF ANY
AND ALL DISPUTES THAT MAY BE FILED IN ANY COURT AND THAT RELATE TO THE SUBJECT MATTER OF THIS TRANSACTION, INCLUDING, WITHOUT LIMITATION, CONTRACT CLAIMS, TORT CLAIMS (INCLUDING NEGLIGENCE), BREACH OF DUTY CLAIMS, AND ALL OTHER COMMON LAW AND
STATUTORY CLAIMS. THIS SECTION HAS BEEN FULLY DISCUSSED BY EACH OF THE PARTIES HERETO AND THESE PROVISIONS WILL NOT BE SUBJECT TO ANY EXCEPTIONS. EACH PARTY HERETO HEREBY FURTHER WARRANTS AND REPRESENTS THAT SUCH PARTY HAS REVIEWED THIS WAIVER WITH
ITS LEGAL COUNSEL, AND THAT SUCH PARTY KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL RIGHTS FOLLOWING CONSULTATION WITH LEGAL COUNSEL. 

6.12 Delays or Omissions. No delay or omission to exercise any right, power, or remedy accruing to any party under this Agreement, upon
any breach or default of any other party under this Agreement, shall impair any such right, power, or remedy of such nonbreaching or nondefaulting party, nor shall it be construed to be a waiver of or acquiescence to any such breach or default, or
to any similar breach or default thereafter occurring, nor shall any waiver of any single breach or default be deemed a waiver of any other breach or default theretofore or thereafter occurring. All remedies, whether under this Agreement or by law
or otherwise afforded to any party, shall be cumulative and not alternative. 
 [Remainder of Page Intentionally Left Blank] 

  
 23 

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

			
	VOR BIOPHARMA INC.
		
	By:	 	/s/ Robert Ang
	Name:	 	Robert Ang
	Title:	 	President and Chief Executive Officer

 SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

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

[***]               

SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

 SCHEDULE A 

INVESTORS 
 [***]EX-10.22

 Exhibit 10.22 

CERTAIN IDENTIFIED INFORMATION HAS BEEN EXCLUDED (INDICATED BY: [***]) FROM THE EXHIBIT BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) WOULD LIKELY
CAUSE COMPETITIVE HARM IF PUBLICLY DISCLOSED. 
 AMENDED AND RESTATED RIGHT OF FIRST REFUSAL AND
CO-SALE AGREEMENT 

 TABLE OF CONTENTS 

 

									
	 	 	 	  	 	  	Page	 
	1.	 	Definitions	  	 	1	 
	2.	 	Agreement Among the Company, the Investors and the Key Holders	  	 	3	 
				
		 	2.1	  	 Right of First Refusal
	  	 	3	 
		 	2.2	  	 Right of Co-Sale 
	  	 	4	 
		 	2.3	  	 Effect of Failure to Comply
	  	 	6	 
			
	3.	 	Exempt Transfers	  	 	7	 
				
		 	3.1	  	 Exempted Transfers
	  	 	7	 
		 	3.2	  	 Exempted Offerings
	  	 	7	 
		 	3.3	  	 Prohibited Transferees
	  	 	7	 
			
	4.	 	Legend	  	 	7	 
	5.	 	Lock-Up	  	 	8	 
				
		 	5.1	  	 Agreement to Lock-Up
	  	 	8	 
		 	5.2	  	 Stop Transfer Instructions
	  	 	8	 
			
	6.	 	Miscellaneous	  	 	8	 
				
		 	6.1	  	 Term
	  	 	8	 
		 	6.2	  	 Stock Split
	  	 	8	 
		 	6.3	  	 Ownership
	  	 	8	 
		 	6.4	  	 Dispute Resolution
	  	 	8	 
		 	6.5	  	 Notices
	  	 	9	 
		 	6.6	  	 Entire Agreement
	  	 	10	 
		 	6.7	  	 Delays or Omissions
	  	 	10	 
		 	6.8	  	 Amendment; Waiver and Termination
	  	 	10	 
		 	6.9	  	 Assignment of Rights
	  	 	11	 
		 	6.10	  	 Severability
	  	 	11	 
		 	6.11	  	 Additional Investors
	  	 	11	 
		 	6.12	  	 Governing Law
	  	 	11	 
		 	6.13	  	 Titles and Subtitles
	  	 	11	 
		 	6.14	  	 Counterparts
	  	 	11	 
		 	6.15	  	 Aggregation of Stock
	  	 	12	 
		 	6.16	  	 Specific Performance
	  	 	12	 
		 	6.17	  	 Additional Key Holders
	  	 	12	 
		 	6.18	  	 Consent of Spouse
	  	 	12	 

  

					
	Schedule A	  	-	  	Investors 
			
	Schedule B	  	-	  	Key Holders
			
	Exhibit A	  	-	  	Consent of Spouse

 AMENDED AND RESTATED RIGHT OF FIRST REFUSAL AND
CO-SALE AGREEMENT 
 THIS AMENDED AND RESTATED RIGHT OF FIRST REFUSAL AND CO-SALE AGREEMENT (this “Agreement”), is made as of the 30th day of June, 2020 by and among Vor Biopharma Inc., a Delaware corporation (the “Company”), the Investors (as defined below) listed on
Schedule A and the Key Holders (as defined below) listed on Schedule B. 
 WHEREAS, the Company, the Key Holders
and certain of the Investors (the “Existing Investors”) previously entered into a Right of First Refusal and Co-Sale Agreement dated [***] in connection with the sale and issuance of shares of
Series A-2 Preferred Stock of the Company, par value $0.0001 per share (“Series A-2 Preferred Stock”); and 

WHEREAS, the Company, the Key Holders and the Existing Investors desire to induce certain of the Investors to purchase shares of the
Series B Preferred Stock of the Company, par value $0.0001 per share (“Series B Preferred Stock”) pursuant to that certain Series B Preferred Stock Purchase Agreement, of even date herewith (the “Purchase
Agreement”) by amending and restating the Prior Agreement to provide the Investors with the rights and privileges as set forth in this Agreement. 

NOW, THEREFORE, the Company, the Key Holders and the Investors, including the Existing Investors, each hereby agree to amend and
restate the Prior Agreement in its entirety as set forth in this agreement, and the parties further agree as follows: 
 1. Definitions. 

1.1 “Affiliate” means, with respect to any specified Investor, any other Investor who directly or indirectly, controls, is
controlled by or is under common control with such Investor, including, without limitation, any general partner, managing member, officer, director or trustee of such Investor, or any investment fund or registered investment company now or hereafter
existing which is controlled by one or more general partners, managing members or investment advisers of, or shares the same management company or investment adviser with, such Investor. 

1.2 “Board of Directors” means the board of directors of the Company. 

1.3 “Capital Stock” means (a) shares of Common Stock and Preferred Stock (whether now outstanding or hereafter issued in
any context), (b) shares of Common Stock issued or issuable upon conversion of Preferred Stock, and (c) shares of Common Stock issued or issuable upon exercise or conversion, as applicable, of stock options, warrants or other convertible
securities of the Company, in each case now owned or subsequently acquired by any Key Holder, any Investor, or their respective successors or permitted transferees or assigns. For purposes of the number of shares of Capital Stock held by an Investor
or Key Holder (or any other calculation based thereon), all shares of Preferred Stock shall be deemed to have been converted into Common Stock at the then-applicable conversion ratio. 

1.4 “Change of Control” means a transaction or series of related transactions in which a person, or a group of related
persons, acquires from stockholders of the Company shares representing more than fifty percent (50%) of the outstanding voting power of the Company. 

1.5 “Common Stock” means shares of Common Stock of the Company, $0.0001 par value per share. 

 1.6 “Company Notice” means written notice from the Company notifying the
selling Key Holders and each Investor that the Company intends to exercise its Right of First Refusal as to some or all of the Transfer Stock with respect to any Proposed Key Holder Transfer. 

1.7 “Investor Notice” means written notice from any Investor notifying the Company and the selling Key Holder(s) that such
Investor intends to exercise its Secondary Refusal Right as to a portion of the Transfer Stock with respect to any Proposed Key Holder Transfer. 

1.8 “Investors” means the persons named on Schedule A hereto, each person to whom the rights of an Investor are
assigned pursuant to Subsection 6.9, each person who hereafter becomes a signatory to this Agreement pursuant to Subsection 6.11 and any one of them, as the context may require; provided, however, that any such person shall cease to be
considered an Investor for purposes of this Agreement at any time such person and his, her or its Affiliates collectively hold fewer than [***] shares of Capital Stock (as adjusted for any stock combination, stock split, stock dividend,
recapitalization or other similar transaction and excluding any shares of Common Stock issued to an Investor pursuant to the Special Mandatory Conversion provisions of the Restated Certificate). 

1.9 “Key Holders” means the persons named on Schedule B hereto, each person to whom the rights of a Key Holder are
assigned pursuant to Subsection 3.1, each person who hereafter becomes a signatory to this Agreement pursuant to Subsection 6.9 or 6.17 and any one of them, as the context may require. 

1.10 “Preferred Stock” means collectively, all shares of Series A-1 Preferred Stock,
Series A-2 Preferred Stock and Series B Preferred Stock. 
 1.11 “Proposed Key Holder
Transfer” means any assignment, sale, offer to sell, pledge, mortgage, hypothecation, encumbrance, disposition of or any other like transfer or encumbering of any Transfer Stock (or any interest therein) proposed by any of the Key Holders.

 1.12 “Proposed Transfer Notice” means written notice from a Key Holder setting forth the terms and conditions of a
Proposed Key Holder Transfer. 
 1.13 “Prospective Transferee” means any person to whom a Key Holder proposes to make a
Proposed Key Holder Transfer. 
 1.14 “Restated Certificate” means the Company’s Amended and Restated Certificate of
Incorporation, as amended and/or restated from time to time. 
 1.15 “Right of
Co-Sale” means the right, but not an obligation, of an Investor to participate in a Proposed Key Holder Transfer on the terms and conditions specified in the Proposed Transfer Notice. 

1.16 “Right of First Refusal” means the right, but not an obligation, of the Company, or its permitted transferees or
assigns, to purchase some or all of the Transfer Stock with respect to a Proposed Key Holder Transfer, on the terms and conditions specified in the Proposed Transfer Notice. 

1.17 “Secondary Notice” means written notice from the Company notifying the Investors and the selling Key Holder that the
Company does not intend to exercise its Right of First Refusal as to all shares of any Transfer Stock with respect to a Proposed Key Holder Transfer, on the terms and conditions specified in the Proposed Transfer Notice. 

  
 2 

 1.18 “Secondary Refusal Right” means the right, but not an obligation, of
each Investor to purchase up to its pro rata portion (based upon the total number of shares of Capital Stock then held by all Investors) of any Transfer Stock not purchased pursuant to the Right of First Refusal, on the terms and conditions
specified in the Proposed Transfer Notice. 
 1.19 “Series A-1 Preferred Stock”
means shares of Series A-1 Preferred Stock, par value $0.0001 per share, of the Company. 
 1.20
“Transfer Stock” means shares of Capital Stock owned by a Key Holder, or issued to a Key Holder after the date hereof (including, without limitation, in connection with any stock split, stock dividend, recapitalization,
reorganization, or the like), but does not include any shares of Preferred Stock or of Common Stock that are issued or issuable upon conversion of Preferred Stock. 

1.21 “Undersubscription Notice” means written notice from an Investor notifying the Company and the selling Key Holder that
such Investor intends to exercise its option to purchase all or any portion of the Transfer Stock not purchased pursuant to the Right of First Refusal or the Secondary Refusal Right. 

2. Agreement Among the Company, the Investors and the Key Holders. 

2.1 Right of First Refusal. 

(a) Grant. Subject to the terms of Section 3 below, each Key Holder hereby unconditionally and irrevocably grants to the
Company a Right of First Refusal to purchase all or any portion of Transfer Stock that such Key Holder may propose to transfer in a Proposed Key Holder Transfer, at the same price and on the same terms and conditions as those offered to the
Prospective Transferee. 
 (b) Notice. Each Key Holder proposing to make a Proposed Key Holder Transfer must deliver a Proposed
Transfer Notice to the Company and each Investor not later than [***] prior to the consummation of such Proposed Key Holder Transfer. Such Proposed Transfer Notice shall contain the material terms and conditions (including price and form of
consideration) of the Proposed Key Holder Transfer, the identity of the Prospective Transferee and the intended date of the Proposed Key Holder Transfer. To exercise its Right of First Refusal under this Section 2, the Company must
deliver a Company Notice to the selling Key Holder and the Investors within [***] after delivery of the Proposed Transfer Notice specifying the number of shares of Transfer Stock to be purchased by the Company. In the event of a conflict between
this Agreement and any other agreement that may have been entered into by a Key Holder with the Company that contains a preexisting right of first refusal, the Company and the Key Holder acknowledge and agree that the terms of this Agreement shall
control and the preexisting right of first refusal shall be deemed satisfied by compliance with Subsection 2.1(a) and this Subsection 2.1(b). 

(c) Grant of Secondary Refusal Right to the Investors. Subject to the terms of Section 3 below, each Key Holder hereby
unconditionally and irrevocably grants to the Investors a Secondary Refusal Right to purchase all or any portion of the Transfer Stock not purchased by the Company pursuant to the Right of First Refusal, as provided in this Subsection 2.1(c).
If the Company does not provide the Company Notice exercising its Right of First Refusal with respect to all Transfer Stock subject to a Proposed Key Holder Transfer, the Company must deliver a Secondary Notice to the selling Key Holder and to each
Investor to that effect no later than [***] after the selling Key Holder delivers the Proposed Transfer Notice to the Company. To exercise its Secondary Refusal Right, an Investor must deliver an Investor Notice to the selling Key Holder and the
Company within [***] after the Company’s deadline for its delivery of the Secondary Notice as provided in the preceding sentence. 

  
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 (d) Undersubscription of Transfer Stock. If options to purchase have been exercised
by the Company and the Investors pursuant to Subsections 2.1(b) and (c) with respect to some but not all of the Transfer Stock by the end of the [***] period specified in the last sentence of Subsection 2.1(c) (the
“Investor Notice Period”), then the Company shall, within [***] after the expiration of the Investor Notice Period, send written notice (the “Company Undersubscription Notice”) to those Investors who fully exercised
their Secondary Refusal Right within the Investor Notice Period (the “Exercising Investors”). Each Exercising Investor shall, subject to the provisions of this Subsection 2.1(d), have an additional option to purchase all or
any part of the balance of any such remaining unsubscribed shares of Transfer Stock on the terms and conditions set forth in the Proposed Transfer Notice. To exercise such option, an Exercising Investor must deliver an Undersubscription Notice to
the selling Key Holder and the Company within [***] after the expiration of the Investor Notice Period. In the event there are [***] or more such Exercising Investors that choose to exercise the last-mentioned option for a total number of remaining
shares in excess of the number available, the remaining shares available for purchase under this Subsection 2.1(d) shall be allocated to such Exercising Investors pro rata based on the number of shares of Transfer Stock such Exercising
Investors have elected to purchase pursuant to the Secondary Refusal Right (without giving effect to any shares of Transfer Stock that any such Exercising Investor has elected to purchase pursuant to the Company Undersubscription Notice). If the
options to purchase the remaining shares are exercised in full by the Exercising Investors, the Company shall immediately notify all of the Exercising Investors and the selling Key Holder of that fact. 

(e) Consideration; Closing. If the consideration proposed to be paid for the Transfer Stock is in property, services or other non-cash consideration, the fair market value of the consideration shall be as determined in good faith by the Board of Directors and as set forth in the Company Notice. If the Company or any Investor cannot for any
reason pay for the Transfer Stock in the same form of non-cash consideration, the Company or such Investor may pay the cash value equivalent thereof, as determined in good faith by the Board of Directors and
as set forth in the Company Notice. The closing of the purchase of Transfer Stock by the Company and the Investors shall take place, and all payments from the Company and the Investors shall have been delivered to the selling Key Holder, by the
later of (i) the date specified in the Proposed Transfer Notice as the intended date of the Proposed Key Holder Transfer; and (ii) [***] after delivery of the Proposed Transfer Notice. 

2.2 Right of Co-Sale. 

(a) Exercise of Right. If any Transfer Stock subject to a Proposed Key Holder Transfer is not purchased pursuant to Subsection
2.1 above and thereafter is to be sold to a Prospective Transferee, each respective Investor may elect to exercise its Right of Co-Sale and participate on a pro rata basis in the Proposed Key Holder
Transfer as set forth in Subsection 2.2(b) below and, subject to Subsection 2.2(d), otherwise on the same terms and conditions specified in the Proposed Transfer Notice. Each Investor who desires to exercise its Right of Co-Sale (each, a “Participating Investor”) must give the selling Key Holder written notice to that effect within [***] after the deadline for delivery of the Secondary Notice described above, and
upon giving such notice such Participating Investor shall be deemed to have effectively exercised the Right of Co-Sale. 

(b) Shares Includable. Each Participating Investor may include in the Proposed Key Holder Transfer all or any part of such
Participating Investor’s Capital Stock equal to the product obtained by multiplying (i) the aggregate number of shares of Transfer Stock subject to the Proposed Key Holder Transfer (excluding shares purchased by the Company or the
Participating Investors pursuant to the Right of First Refusal or the Secondary Refusal Right) by (ii) a fraction, the numerator of which is the number of shares of Capital Stock owned by such Participating Investor immediately before
consummation of the Proposed Key Holder Transfer (including any shares that such Participating Investor has agreed to purchase pursuant to the Secondary Refusal Right) and the denominator of which is the total number of shares of

  
 4 

 
Capital Stock owned, in the aggregate, by all Participating Investors immediately prior to the consummation of the Proposed Key Holder Transfer (including any shares that all Participating
Investors have collectively agreed to purchase pursuant to the Secondary Refusal Right), plus the number of shares of Transfer Stock held by the selling Key Holder. To the extent one (1) or more of the Participating Investors exercise such
right of participation in accordance with the terms and conditions set forth herein, the number of shares of Transfer Stock that the selling Key Holder may sell in the Proposed Key Holder Transfer shall be correspondingly reduced. 

(c) Purchase and Sale Agreement. The Participating Investors and the selling Key Holder agree that the terms and conditions of any
Proposed Key Holder Transfer in accordance with this Subsection 2.2 will be memorialized in, and governed by, a written purchase and sale agreement with the Prospective Transferee (the “Purchase and Sale Agreement”) with
customary terms and provisions for such a transaction, and the Participating Investors and the selling Key Holder further covenant and agree to enter into such Purchase and Sale Agreement as a condition precedent to any sale or other transfer in
accordance with this Subsection 2.2. 
 (d) Allocation of Consideration. 

(i) Subject to Subsection 2.2(d)(ii), the aggregate consideration payable to the Participating Investors and the selling Key Holder
shall be allocated based on the number of shares of Capital Stock sold to the Prospective Transferee by each Participating Investor and the selling Key Holder as provided in Subsection 2.2(b), provided that if a Participating Investor
wishes to sell Preferred Stock, the price set forth in the Proposed Transfer Notice shall be appropriately adjusted based on the conversion ratio of the Preferred Stock into Common Stock. 

(ii) In the event that the Proposed Key Holder Transfer constitutes a Change of Control, the terms of the Purchase and Sale Agreement shall
provide that the aggregate consideration from such transfer shall be allocated to the Participating Investors and the selling Key Holder in accordance with Sections 2.1 and 2.2 of Article IV(B) of the Restated Certificate and, if applicable, the
next sentence as if (A) such transfer were a Deemed Liquidation Event (as defined in the Restated Certificate), and (B) the Capital Stock sold in accordance with the Purchase and Sale Agreement were the only Capital Stock
outstanding. In the event that a portion of the aggregate consideration payable to the Participating Investor(s) and selling Key Holder is placed into escrow and/or is payable only upon satisfaction of contingencies, the Purchase and Sale Agreement
shall provide that (x) the portion of such consideration that is not placed in escrow and is not subject to contingencies (the “Initial Consideration”) shall be allocated in accordance with Sections 2.1 and 2.2 of
Article IV(B) of the Restated Certificate as if the Initial Consideration were the only consideration payable in connection with such transfer, and (y) any additional consideration which becomes payable to the Participating Investor(s)
and selling Key Holder upon release from escrow or satisfaction of such contingencies shall be allocated in accordance with Sections 2.1 and 2.2 of Article IV(B) of the Restated Certificate after taking into account the previous payment of the
Initial Consideration as part of the same transfer. 
 (e) Purchase by Selling Key Holder; Deliveries. Notwithstanding Subsection
2.2(c) above, if any Prospective Transferee or Transferees refuse(s) to purchase securities subject to the Right of Co-Sale from any Participating Investor or Investors or upon the failure to negotiate in
good faith a Purchase and Sale Agreement reasonably satisfactory to the Participating Investors, no Key Holder may sell any Transfer Stock to such Prospective Transferee or Transferees unless and until, simultaneously with such sale, such Key Holder
purchases all securities subject to the Right of Co-Sale from such Participating Investor or Investors on the same terms and conditions (including the proposed purchase price) as set forth in the Proposed
Transfer Notice and as provided in Subsection 2.2(d)(i); provided, however, if such sale constitutes a Change of Control, the portion of the aggregate consideration paid by the selling Key Holder

  
 5 

 
to such Participating Investor or Investors shall be made in accordance with the first sentence of Subsection 2.2(d)(ii). In connection with such purchase by the selling Key Holder,
such Participating Investor or Investors shall deliver to the selling Key Holder any stock certificate or certificates, properly endorsed for transfer, representing the Capital Stock being purchased by the selling Key Holder (or request that the
Company effect such transfer in the name of the selling Key Holder). Any such shares transferred to the selling Key Holder will be transferred to the Prospective Transferee against payment therefor in consummation of the sale of the Transfer Stock
pursuant to the terms and conditions specified in the Proposed Transfer Notice, and the selling Key Holder shall concurrently therewith remit or direct payment to each such Participating Investor the portion of the aggregate consideration to which
each such Participating Investor is entitled by reason of its participation in such sale as provided in this Subsection 2.2(e). 

(f) Additional Compliance. If any Proposed Key Holder Transfer is not consummated within [***] days after receipt of the Proposed
Transfer Notice by the Company, the Key Holders proposing the Proposed Key Holder Transfer may not sell any Transfer Stock unless they first comply in full with each provision of this Section 2. The exercise or election not to exercise
any right by any Investor hereunder shall not adversely affect its right to participate in any other sales of Transfer Stock subject to this Subsection 2.2. 

2.3 Effect of Failure to Comply. 

(a) Transfer Void; Equitable Relief. Any Proposed Key Holder Transfer not made in compliance with the requirements of this Agreement
shall be null and void ab initio, shall not be recorded on the books of the Company or its transfer agent and shall not be recognized by the Company. Each party hereto acknowledges and agrees that any breach of this Agreement would result in
substantial harm to the other parties hereto for which monetary damages alone could not adequately compensate. Therefore, the parties hereto unconditionally and irrevocably agree that any non-breaching party
hereto shall be entitled to seek protective orders, injunctive relief and other remedies available at law or in equity (including, without limitation, seeking specific performance or the rescission of purchases, sales and other transfers of Transfer
Stock not made in strict compliance with this Agreement). 
 (b) Violation of First Refusal Right. If any Key Holder becomes
obligated to sell any Transfer Stock to the Company or any Investor under this Agreement and fails to deliver such Transfer Stock in accordance with the terms of this Agreement, the Company and/or such Investor may, at its option, in addition to all
other remedies it may have, send to such Key Holder the purchase price for such Transfer Stock as is herein specified and transfer to the name of the Company or such Investor (or request that the Company effect such transfer in the name of an
Investor) on the Company’s books any certificates, instruments, or book entry representing the Transfer Stock to be sold. 
 (c)
Violation of Co-Sale Right. If any Key Holder purports to sell any Transfer Stock in contravention of the Right of Co-Sale (a “Prohibited
Transfer”), each Participating Investor who desires to exercise its Right of Co-Sale under Subsection 2.2 may, in addition to such remedies as may be available by law, in equity or hereunder,
require such Key Holder to purchase from such Participating Investor the type and number of shares of Capital Stock that such Participating Investor would have been entitled to sell to the Prospective Transferee had the Prohibited Transfer been
effected in compliance with the terms of Subsection 2.2. The sale will be made on the same terms, including, without limitation, as provided in Subsection 2.2(d)(i) and the first sentence of Subsection 2.2(d)(ii), as applicable,
and subject to the same conditions as would have applied had the Key Holder not made the Prohibited Transfer, except that the sale (including, without limitation, the delivery of the purchase price) must be made within [***] after the Participating
Investor learns of the Prohibited Transfer, as opposed to the timeframe proscribed in Subsection 2.2. Such Key Holder shall also reimburse each Participating Investor for any and all reasonable and documented out-of-pocket fees and expenses, including reasonable legal fees and expenses, incurred pursuant to the exercise or the attempted exercise of the Participating Investor’s rights under
Subsection 2.2. 

  
 6 

 3. Exempt Transfers. 

3.1 Exempted Transfers. Notwithstanding the foregoing or anything to the contrary herein, the provisions of Subsections 2.1 and
2.2 shall not apply (a) in the case of a Key Holder that is an entity, upon a transfer by such Key Holder to its stockholders, members, partners or other equity holders, (b) to a repurchase of Transfer Stock from a Key Holder
by the Company at a price no greater than that originally paid by such Key Holder for such Transfer Stock and pursuant to an agreement containing vesting and/or repurchase provisions approved by a majority of the Board of Directors, including a
majority of Preferred Directors or (c) in the case of a Key Holder that is a natural person, upon a transfer of Transfer Stock by such Key Holder made for bona fide estate planning purposes, either during his or her lifetime or on death
by will or intestacy to his or her spouse, child (natural or adopted), or any other direct lineal descendant of such Key Holder (or his or her spouse) (all of the foregoing collectively referred to as “family members”), or any other person
approved by the Board of Directors, or any custodian or trustee of any trust, partnership or limited liability company for the benefit of, or the ownership interests of which are owned wholly by such Key Holder or any such family members; provided
that in the case of clause(s) (a) or (c), the Key Holder shall deliver prior written notice to the Investors of such pledge, gift or transfer and such shares of Transfer Stock shall at all times remain subject to the terms and
restrictions set forth in this Agreement and such transferee shall, as a condition to such issuance, deliver a counterpart signature page to this Agreement as confirmation that such transferee shall be bound by all the terms and conditions of this
Agreement as a Key Holder (but only with respect to the securities so transferred to the transferee), including the obligations of a Key Holder with respect to Proposed Key Holder Transfers of such Transfer Stock pursuant to Section 2;
and provided further in the case of any transfer pursuant to clause (a) or (d) above, that such transfer is made pursuant to a transaction in which there is no consideration actually paid for such transfer. 

3.2 Exempted Offerings. Notwithstanding the foregoing or anything to the contrary herein, the provisions of Section 2 shall
not apply to the sale of any Transfer Stock (a) to the public in an offering pursuant to an effective registration statement under the Securities Act of 1933, as amended (a “Public Offering”); or (b) pursuant to a Deemed
Liquidation Event (as defined in the Restated Certificate). 
 3.3 Prohibited Transferees. Notwithstanding the foregoing, no Key
Holder shall transfer any Transfer Stock to (a) any entity which, in the determination of the Board of Directors, directly or indirectly competes with the Company; or (b) any customer, distributor or supplier of the Company, if the
Board of Directors should determine that such transfer would result in such customer, distributor or supplier receiving information that would place the Company at a competitive disadvantage with respect to such customer, distributor or supplier.

 4. Legend. Each certificate, instrument, or book entry representing shares of Transfer Stock held by the Key Holders or issued to
any permitted transferee in connection with a transfer permitted by Subsection 3.1 hereof shall be notated with the following legend: 

THE SALE, PLEDGE, HYPOTHECATION, OR TRANSFER OF THE SECURITIES REPRESENTED HEREBY IS SUBJECT TO, AND IN CERTAIN CASES PROHIBITED BY, THE TERMS
AND CONDITIONS OF A CERTAIN RIGHT OF FIRST REFUSAL AND CO-SALE AGREEMENT BY AND AMONG THE STOCKHOLDER, THE CORPORATION AND CERTAIN OTHER HOLDERS OF STOCK OF THE CORPORATION. COPIES OF SUCH AGREEMENT MAY BE
OBTAINED UPON WRITTEN REQUEST TO THE SECRETARY OF THE CORPORATION. 

  
 7 

 Each Key Holder agrees that the Company may instruct its transfer agent to impose transfer restrictions on
the shares notated with the legend referred to in this Section 4 above to enforce the provisions of this Agreement, and the Company agrees to promptly do so. The legend shall be removed upon termination of this Agreement at
the request of the holder. 
 5. Lock-Up. 

5.1 Agreement to Lock-Up. Each Key Holder hereby agrees that it will not, without the prior
written consent of the managing underwriter, during the period commencing on the date of the final prospectus relating to the Company’s initial public offering (the “IPO”) and ending on the date specified by the Company and the
managing underwriter (such period not to exceed [***]), or such other period as may be requested by the Company or an underwriter to accommodate regulatory restrictions on (1) the publication or other distribution of research reports;
and (2) analyst recommendations and opinions, including, but not limited to, the restrictions contained in FINRA Rule 2711(f)(4) or NYSE Rule 472(f)(4), or any successor provisions or amendments thereto), (a) lend, offer, pledge, sell,
contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, or otherwise transfer or dispose of, directly or indirectly, any shares of Capital Stock held
immediately prior to the effectiveness of the registration statement for the IPO; or (b) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the
Capital Stock, whether any such transaction described in clause (a) or (b) above is to be settled by delivery of Capital Stock or other securities, in cash or otherwise. [***] The underwriters in connection with the IPO are intended
third-party beneficiaries of this Section 5 and shall have the right, power and authority to enforce the provisions hereof as though they were a party hereto. Each Key Holder further agrees to execute such agreements as may be reasonably
requested by the underwriters in the IPO that are consistent with this Section 5 or that are necessary to give further effect thereto. 

5.2 Stop Transfer Instructions. In order to enforce the foregoing covenant, the Company may impose stop-transfer instructions with
respect to the shares of Capital Stock of each Key Holder (and transferees and assignees thereof) until the end of such restricted period. 
 6.
Miscellaneous. 
 6.1 Term. This Agreement shall automatically terminate upon the earlier of [***]. 

6.2 Stock Split. All references to numbers of shares in this Agreement shall be appropriately adjusted to reflect any stock dividend,
split, combination or other recapitalization affecting the Capital Stock occurring after the date of this Agreement. 
 6.3
Ownership. Each Key Holder represents and warrants that such Key Holder is the sole legal and beneficial owner of the shares of Transfer Stock subject to this Agreement and that no other person or entity has any interest in such shares (other
than a community property interest as to which the holder thereof has acknowledged and agreed in writing to the restrictions and obligations hereunder). 

6.4 Dispute Resolution. The parties (a) hereby irrevocably and unconditionally submit to the jurisdiction of the state courts of
the State of Delaware and to the jurisdiction of the United States District Court for the District 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 state courts of the State of Delaware or the United States District Court for the District 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. 

  
 8 

 WAIVER OF JURY TRIAL: EACH PARTY HEREBY WAIVES ITS RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION
BASED UPON OR ARISING OUT OF THIS AGREEMENT, THE OTHER TRANSACTION DOCUMENTS, THE SECURITIES OR THE SUBJECT MATTER HEREOF OR THEREOF. THE SCOPE OF THIS WAIVER IS INTENDED TO BE ALL-ENCOMPASSING OF ANY AND ALL
DISPUTES THAT MAY BE FILED IN ANY COURT AND THAT RELATE TO THE SUBJECT MATTER OF THIS TRANSACTION, INCLUDING, WITHOUT LIMITATION, CONTRACT CLAIMS, TORT CLAIMS (INCLUDING NEGLIGENCE), BREACH OF DUTY CLAIMS, AND ALL OTHER COMMON LAW AND STATUTORY
CLAIMS. THIS SECTION HAS BEEN FULLY DISCUSSED BY EACH OF THE PARTIES HERETO AND THESE PROVISIONS WILL NOT BE SUBJECT TO ANY EXCEPTIONS. EACH PARTY HERETO HEREBY FURTHER WARRANTS AND REPRESENTS THAT SUCH PARTY HAS REVIEWED THIS WAIVER WITH ITS LEGAL
COUNSEL, AND THAT SUCH PARTY KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL RIGHTS FOLLOWING CONSULTATION WITH LEGAL COUNSEL. 
 Each party will bear its
own costs in respect of any disputes arising under this Agreement. The prevailing party shall be entitled to reasonable attorney’s fees, costs, and necessary disbursements in addition to any other relief to which such party may be entitled.]
Each of the parties to this Agreement consents to personal jurisdiction for any equitable action sought in the U.S. District Court for the District of Delaware or any court of the State of Delaware having subject matter jurisdiction. 

6.5 Notices. 
 All notices and other
communications given or made pursuant to this Agreement shall be in writing and shall be deemed effectively given upon the earlier of actual receipt or (a) personal delivery to the party to be notified, (b) when sent, if sent by electronic
mail or facsimile during normal business hours of the recipient, and if not sent during normal business hours, then on the recipient’s next business day, (c) five (5) days after having been sent by registered or certified mail, return
receipt requested, postage prepaid, or (d) one (1) business day after deposit with a nationally recognized overnight courier, freight prepaid, specifying next business day delivery, with written verification of receipt. All communications shall
be sent to the respective parties at their address as set forth on Schedule A or Schedule B hereof, as the case may be, or to such email address, facsimile number or address as subsequently modified by written notice given in
accordance with this Section 6.5. If notice is given to the Company, it shall be sent to [***]; and a copy shall also be sent to [***], and if notice is given to Stockholders, a copy shall also be given to [***]. 

(a) Consent to Electronic Notice. Each Investor and Key Holder consents to the delivery of any stockholder notice pursuant to the
Delaware General Corporation Law (the “DGCL”), as amended or superseded from time to time, by electronic transmission pursuant to Section 232 of the DGCL (or any successor thereto) at the electronic mail address or the
facsimile number set forth below such Investor’s or Key Holder’s name on the Schedules hereto, as updated from time to time by notice to the Company, or as on the books of the Company. To the extent that any notice given by means of
electronic transmission is returned or undeliverable for any reason, the foregoing consent shall be deemed to have been revoked until a new or corrected electronic mail address has been provided, and such attempted Electronic Notice shall be
ineffective and deemed to not have been given. Each Investor and Key Holder agrees to promptly notify the Company of any change in its electronic mail address, and that failure to do so shall not affect the foregoing. 

  
 9 

 6.6 Entire Agreement. Upon effectiveness of this Agreement, the Prior Agreement shall
be deemed to be amended and restated and superseded and replaced in its entirety by this Agreement and shall be of no further force or effect. This Agreement (including, the Exhibits and Schedules hereto) constitutes 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. 

6.7 Delays or Omissions. No delay or omission to exercise any right, power or remedy accruing to any party under this Agreement, upon
any breach or default of any other party under this Agreement, shall impair any such right, power or remedy of such non-breaching or non-defaulting party nor shall it be construed to be a waiver of any such
breach or default, or an acquiescence therein, or of or in any similar breach or default thereafter occurring; nor shall any waiver of any single breach or default be deemed a waiver of any other breach or default theretofore or thereafter
occurring. Any waiver, permit, consent or approval of any kind or character on the part of any party of any breach or default under this Agreement, or any waiver on the part of any party of any provisions or conditions of this Agreement, must be in
writing and shall be effective only to the extent specifically set forth in such writing. All remedies, either under this Agreement or by law or otherwise afforded to any party, shall be cumulative and not alternative. 

6.8 Amendment; Waiver and Termination. This Agreement may be amended, modified or terminated (other than pursuant to
Section 6.1 above) and the observance of any term hereof may be waived (either generally or in a particular instance and either retroactively or prospectively) only by a written instrument executed by (a) the
Company, (b) the Key Holders holding [***] of the shares of Transfer Stock then held by all of the Key Holders who are then providing services to the Company as officers, employees or consultants, provided, that such
consent shall not be required if the Key Holders do not then own [***] shares of Capital Stock and (c) the holders of [***] shares of Common Stock issued or issuable upon conversion of the then outstanding shares of [***] held by the Investors
(voting as a single separate class and on an as-converted basis but excluding any Common Stock issued upon conversion of the Preferred Stock pursuant to the “Special Mandatory Conversion” provisions of the Restated Certificate). Any
amendment, modification, termination or waiver so effected shall be binding upon the Company, the Investors, the Key Holders and all of their respective successors and permitted assigns whether or not such party, assignee or other shareholder
entered into or approved such amendment, modification, termination or waiver. Notwithstanding the foregoing, (i) this Agreement may not be amended, modified or terminated and the observance of any term hereunder may not be waived with
respect to any Investor or Key Holder without the written consent of such Investor or Key Holder unless such amendment, modification, termination or waiver applies to all Investors and Key Holders, respectively, in the same fashion,
(ii) this Agreement may not be amended, modified or terminated and the observance of any term hereunder may not be waived with respect to any Investor without the written consent of such Investor, if such amendment, modification,
termination or waiver would adversely affect the rights of such Investor in a manner disproportionate to any adverse effect such amendment, modification, termination or waiver would have on the rights of the other Investors under this Agreement,
(iii) the consent of the Key Holders shall not be required for any amendment, modification, termination or waiver if such amendment, modification, termination or waiver does not apply to the Key Holders, and (iv) Schedule
A hereto may be amended by the Company from time to time in accordance with the Purchase Agreement to add information regarding Additional Purchasers (as defined in the Purchase Agreement) without the consent of the other parties hereto. The
Company shall give prompt written notice of any amendment, modification or termination hereof or waiver hereunder to any party hereto that did not consent in writing to such amendment, modification, termination or waiver. No waivers of or exceptions
to any term, condition or provision of this Agreement, in any one or more instances, shall be deemed to be, or construed as, a further or continuing waiver of any such term, condition or provision. 

  
 10 

 6.9 Assignment of Rights. 

(a) The terms and conditions of this Agreement shall inure to the benefit of and be binding upon the respective successors and permitted
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 permitted assigns any rights, remedies, obligations, or liabilities under or
by reason of this Agreement, except as expressly provided in this Agreement. 
 (b) Any successor or permitted assignee of any Key Holder,
including any Prospective Transferee who purchases shares of Transfer Stock in accordance with the terms hereof, shall deliver to the Company and the Investors, as a condition to any transfer or assignment, a counterpart signature page hereto
pursuant to which such successor or permitted assignee shall confirm their agreement to be subject to and bound by all of the provisions set forth in this Agreement that were applicable to the predecessor or assignor of such successor or permitted
assignee. 
 (c) The rights of the Investors hereunder are not assignable without the Company’s written consent (which shall not be
unreasonably withheld, delayed or conditioned), except (i) by an Investor to any Affiliate, or (ii) to an assignee or transferee who acquires at least [***] shares of Capital Stock (as adjusted for any stock combination,
stock split, stock dividend, recapitalization or other similar transaction), it being acknowledged and agreed that any such assignment, including an assignment contemplated by the preceding clauses (i) or (ii) shall be subject to and
conditioned upon any such assignee’s delivery to the Company and the other Investors of a counterpart signature page hereto pursuant to which such assignee shall confirm their agreement to be subject to and bound by all of the provisions set
forth in this Agreement that were applicable to the assignor of such assignee. 
 (d) Except in connection with an assignment by the Company
by operation of law to the acquirer of the Company, the rights and obligations of the Company hereunder may not be assigned under any circumstances. 

6.10 Severability. The invalidity or unenforceability of any provision hereof shall in no way affect the validity or enforceability of
any other provision. 
 6.11 Additional Investors. Notwithstanding anything to the contrary contained herein, if the Company issues
additional shares of the Company’s Series B Preferred Stock after the date hereof, any purchaser of such shares of Series B Preferred Stock may become a party to this Agreement by executing and delivering an additional counterpart
signature page to this Agreement and thereafter shall be deemed an “Investor” for all purposes hereunder. 
 6.12 Governing
Law. This Agreement shall be governed by the internal law of the State of Delaware, without regard to conflict of law principles that would result in the application of any law other than the law of the State of Delaware. 

6.13 Titles and Subtitles. The titles and subtitles used in this Agreement are used for convenience only and are not to be considered
in construing or interpreting this Agreement. 
 6.14 Counterparts. This Agreement may be executed in two (2) or more
counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Counterparts may be delivered via facsimile, electronic mail (including pdf or any electronic signature complying with
the U.S. federal ESIGN Act of 2000, e.g., www.docusign.com) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes. 

  
 11 

 6.15 Aggregation of Stock. All shares of Capital Stock held or acquired by Affiliated
entities or persons shall be aggregated together for the purpose of determining the availability of any rights under this Agreement and such Affiliated persons may apportion such rights as among themselves in any manner they deem appropriate. 

6.16 Specific Performance. In addition to any and all other remedies that may be available at law in the event of any breach of this
Agreement, each Investor shall be entitled to specific performance of the agreements and obligations of the Company and the Key Holders hereunder and to such other injunction or other equitable relief as may be granted by a court of competent
jurisdiction. 
 6.17 Additional Key Holders. In the event that after the date of this Agreement, the Company issues shares of Common
Stock, or options to purchase Common Stock, to any employee or consultant, which shares or options would collectively constitute with respect to such employee or consultant (taking into account all shares of Common Stock, options and other purchase
rights held by such employee or consultant) [***] or more of the Company’s then outstanding Common Stock (treating for this purpose all shares of Common Stock issuable upon exercise of or conversion of outstanding options, warrants or
convertible securities, as if exercised or converted), the Company shall, as a condition to such issuance, cause such employee or consultant to execute a counterpart signature page hereto as a Key Holder, and such person shall thereby be bound by,
and subject to, all the terms and provisions of this Agreement applicable to a Key Holder. 
 6.18 Consent of Spouse. If any Key
Holder is married on the date of this Agreement, such Key Holder’s spouse shall execute and deliver to the Company a Consent of Spouse in the form of Exhibit A hereto (“Consent of Spouse”), effective on the date hereof.
Notwithstanding the execution and delivery thereof, such consent shall not be deemed to confer or convey to the spouse any rights in such Key Holder’s shares of Transfer Stock that do not otherwise exist by operation of law or the agreement of
the parties. If any Key Holder should marry or remarry subsequent to the date of this Agreement, such Key Holder shall within thirty (30) days thereafter obtain his/her new spouse’s acknowledgement of and consent to the existence
and binding effect of all restrictions contained in this Agreement by causing such spouse to execute and deliver a Consent of Spouse acknowledging the restrictions and obligations contained in this Agreement and agreeing and consenting to the same.

 [Remainder of Page Intentionally Left Blank] 

  
 12 

 IN WITNESS WHEREOF, the parties have executed this Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	VOR BIOPHARMA INC.
		
	 By:
	 	/s/ Robert Ang

 
			
	 Name:
	 	Robert Ang
	 Title:
	 	President and Chief Executive Officer

 SIGNATURE PAGE TO AMENDED AND RESTATED RIGHT OF FIRST REFUSAL AND
CO-SALE AGREEMENT 

  

 IN WITNESS WHEREOF, the parties have executed this Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	[***]

 SIGNATURE PAGE TO AMENDED AND RESTATED RIGHT OF FIRST REFUSAL AND
CO-SALE AGREEMENT 

  

 SCHEDULE A 

INVESTORS 
 [***] 

 SCHEDULE B 

KEY HOLDERS 
 [***] 

 EXHIBIT A 

CONSENT OF SPOUSE 
 I,
                                        ,
spouse of                                     , acknowledge
that I have read the Amended and Restated Right of First Refusal and Co-Sale Agreement, dated as of June 30, 2020, to which this Consent is attached as Exhibit A (the “Agreement”),
and that I know the contents of the Agreement. I am aware that the Agreement contains provisions regarding certain rights to certain other holders of Capital Stock of the Company upon a Proposed Key Holder Transfer of shares of Transfer Stock of the
Company which my spouse may own including any interest I might have therein. 
 I hereby agree that my interest, if any, in any shares of
Transfer Stock of the Company subject to the Agreement shall be irrevocably bound by the Agreement and further understand and agree that any community property interest I may have in such shares of Transfer Stock of the Company shall be similarly
bound by the Agreement. 
 I am aware that the legal, financial and related matters contained in the Agreement are complex and that I am
free to seek independent professional guidance or counsel with respect to this Consent. I have either sought such guidance or counsel or determined after reviewing the Agreement carefully that I will waive such right. 

Dated as of the            day of
          , 20          . 
  

	
	   

	Signature

  

	
	   

	Print Name

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