Document:

EX-10.12

 Exhibit 10.12 

Execution Version 

Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of
information that the registrant treats as private or confidential. 
 Double asterisks denote omissions. 

CAS9 LICENSE AGREEMENT 

by and between 

THE PRESIDENT AND FELLOWS OF HARVARD
COLLEGE, 
 THE BROAD INSTITUTE, INC. 

and 

VERVE THERAPEUTICS, INC. 

March 14, 2019 

 TABLE OF CONTENTS 

 

							
	 	 	 	  	Page	 
	 1. DEFINITIONS
	  	 	2	 
		
	 2. LICENSE
	  	 	27	 
			
	 2.1
	 	License Grants	  	 	27	 
			
	 2.2
	 	Reservation of Rights	  	 	28	 
			
	 2.3
	 	Affiliates	  	 	29	 
			
	 2.4
	 	Right to Subcontract	  	 	30	 
			
	 2.5
	 	Sublicenses	  	 	30	 
			
	 2.6
	 	U.S. Manufacturing	  	 	32	 
			
	 2.7
	 	No Other Grant of Rights	  	 	32	 
			
	 2.8
	 	Additional Limitations on Exercise of License Rights	  	 	32	 
		
	 3. DEVELOPMENT AND COMMERCIALIZATION
	  	 	32	 
			
	 3.1
	 	Diligence; Development Milestones	  	 	32	 
			
	 3.2
	 	Inclusive Innovation Model	  	 	33	 
			
	 3.3
	 	Development Plan; Adjustments	  	 	35	 
			
	 3.4
	 	Reporting	  	 	35	 
			
	 3.5
	 	Failure to Meet Development Milestone; Opportunity to Cure	  	 	35	 
		
	 4. CONSIDERATION FOR GRANT OF LICENSE
	  	 	37	 
			
	 4.1
	 	Division of Consideration	  	 	37	 
			
	 4.2
	 	License Issue Fee	  	 	38	 
			
	 4.3
	 	License Maintenance Fees	  	 	38	 
			
	 4.4
	 	Issuance of Equity	  	 	38	 
			
	 4.5
	 	Milestone Payments	  	 	39	 
			
	 4.6
	 	Royalties	  	 	41	 
			
	 4.7
	 	Sublicense Income	  	 	45	 
			
	 4.8
	 	Sublicense Income Offset	  	 	45	 
			
	 4.9
	 	Complex Consideration	  	 	45	 
			
	 4.10
	 	Additional Consideration	  	 	46	 
			
	 4.11
	 	Share Issuance Limitation	  	 	49	 
			
	 4.12
	 	Non-Circumvention	  	 	49	 
		
	 5. REPORTS; PAYMENTS; RECORDS
	  	 	49	 
			
	 5.1
	 	Reports and Payments	  	 	49	 

  
 i 

							
	 5.2
	 	Payment Currency	  	 	50	 
			
	 5.3
	 	Records	  	 	50	 
			
	 5.4
	 	Late Payments	  	 	51	 
			
	 5.5
	 	Payment Method	  	 	51	 
			
	 5.6
	 	Withholding and Similar Taxes	  	 	52	 
		
	 6. PATENT PROSECUTION
	  	 	52	 
			
	 6.1
	 	Prosecution of Patent Rights	  	 	52	 
			
	 6.2
	 	Fees and Expenses	  	 	52	 
			
	 6.3
	 	Abandonment	  	 	53	 
			
	 6.4
	 	Large Entity Designation	  	 	54	 
			
	 6.5
	 	Marking	  	 	54	 
		
	 7. ENFORCEMENT OF PATENT RIGHTS
	  	 	54	 
			
	 7.1
	 	Notification	  	 	54	 
			
	 7.2
	 	Licensor Institutions’ Enforcement Right	  	 	54	 
			
	 7.3
	 	Suit by Owner Institutions	  	 	56	 
			
	 7.4
	 	Own Counsel	  	 	57	 
			
	 7.5
	 	Cooperation	  	 	57	 
			
	 7.6
	 	Patent Validity Challenge	  	 	57	 
		
	 8. WARRANTIES; LIMITATION OF LIABILITY
	  	 	57	 
			
	 8.1
	 	Compliance with Law	  	 	57	 
			
	 8.2
	 	Representations, Warranties and Covenants	  	 	57	 
			
	 8.3
	 	Disclaimer	  	 	59	 
			
	 8.4
	 	Limitation of Liability	  	 	59	 
		
	 9. INDEMNIFICATION AND INSURANCE
	  	 	59	 
			
	 9.1
	 	Indemnification	  	 	59	 
			
	 9.2
	 	Insurance	  	 	61	 
		
	 10. TERM AND TERMINATION
	  	 	62	 
			
	 10.1
	 	Term	  	 	62	 
			
	 10.2
	 	Termination	  	 	62	 
			
	 10.3
	 	Effect of Termination	  	 	64	 
			
	 10.4
	 	Survival	  	 	67	 
		
	 11. MISCELLANEOUS
	  	 	67	 
			
	 11.1
	 	Confidentiality	  	 	67	 
			
	 11.2
	 	Use of Name	  	 	69	 

  
 ii 

							
	 11.3
	 	Press Release	  	 	70	 
			
	 11.4
	 	No Security Interest	  	 	70	 
			
	 11.5
	 	Entire Agreement	  	 	70	 
			
	 11.6
	 	Notices	  	 	70	 
			
	 11.7
	 	Dispute Resolution	  	 	71	 
			
	 11.8
	 	Governing Law and Jurisdiction	  	 	71	 
			
	 11.9
	 	Binding Effect	  	 	71	 
			
	 11.10
	 	Headings	  	 	71	 
			
	 11.11
	 	Counterparts	  	 	71	 
			
	 11.12
	 	Amendment; Waiver	  	 	72	 
			
	 11.13
	 	No Agency or Partnership	  	 	72	 
			
	 11.14
	 	Assignment and Successors	  	 	72	 
			
	 11.15
	 	Force Majeure	  	 	72	 
			
	 11.16
	 	Interpretation	  	 	72	 
			
	 11.17
	 	Severability	  	 	73	 
			
	 11.18
	 	HHMI Third Party Beneficiary	  	 	73	 

 List of Exhibits: 
  

	
	 Exhibit 1.23 – Cas9 Patent Rights Categories

Exhibit 1.25 – Cas9-I Patent Rights

Exhibit 1.31 – Cas9-II Patent Rights

Exhibit 1.144 – Reviewed Patent Rights

	 Exhibit 1.166 – Targets

	 Exhibit 3.1 – Development Milestones

Exhibit 3.3 – Development Plan

	 Exhibit 4.4.1 – Stock Issuance Agreement

  
 iii 

 CAS9 LICENSE AGREEMENT 

This Cas9 License Agreement (this “Agreement”) is entered into as of this 14th day of March, 2019 (the “Effective
Date”), by and between, on the one hand, the President and Fellows of Harvard College, an educational and charitable corporation existing under the laws and the constitution of the Commonwealth of Massachusetts, having a place of business
at Smith Campus Center, Suite 727, 1350 Massachusetts Avenue, Cambridge, MA 02138 (“Harvard”) and The Broad Institute, Inc., a non-profit Massachusetts corporation, with a principal office at
415 Main Street, Cambridge, MA 02142 (“Broad,” together with Harvard, the “Licensor Institutions” and each individually, a “Licensor Institution”) and, on the other hand, Verve
Therapeutics, Inc., a Delaware corporation, with a principal office at 26 Landsdowne Street, Cambridge, MA 02139 (“Company”). Company and the Licensor Institutions are each referred to herein as a “Party” and
together, the “Parties.” 
 WHEREAS, the technology claimed in the Cas9-I
Patent Rights (as defined below) was discovered by researchers at the Licensor Institutions; 
 WHEREAS, the technology claimed in
the Cas9-II Patent Rights (as defined below) was discovered by researchers at one or more of the Cas9-II Institutions (as defined below); 

WHEREAS, one or more of such researchers at the Licensor Institutions is an employee of the Howard Hughes Medical Institute
(“HHMI”) and HHMI has assigned to Harvard its rights in those Cas9-I Patent Rights on which an HHMI employee is an inventor, subject to certain rights retained by HHMI as specifically
described below; 
 WHEREAS, Harvard is a sole owner of certain of the Cas9-I Patent Rights,
which are identified as “Harvard Controlled Patents” on the attached Exhibit 1.25 (the “Harvard Controlled Patents”); 

WHEREAS, the Massachusetts Institute of Technology (“MIT,” a not-for-profit Massachusetts Corporation with a principal place of business at 77 Massachusetts Avenue, Cambridge, Massachusetts 02139) and Broad are co-owners of
certain of the Cas9-I Patent Rights (the “MIT/Broad Co-Owned Cas9-I Patent Rights”) set forth on Exhibit 1.25;

 WHEREAS, Harvard, MIT and Broad are co-owners of certain of the Cas9-I Patent Rights (the “Harvard/MIT/Broad Co-Owned Cas9-I Patent Rights”), identified together with the MIT/Broad Co-Owned Cas9-I Patent Rights as “Broad Controlled Patents” on the attached Exhibit 1.25; 

WHEREAS, The Rockefeller University (“Rockefeller,” a
not-for-profit New York corporation with a principal place of business at 1230 York Avenue, New York, NY 10065) and Broad are
co-owners of certain of the Cas9-I Patent Rights set forth on Exhibit 1.25; 

WHEREAS, Broad, MIT, Harvard and/or the University of Iowa Research Foundation (“Iowa,” a not-for-profit corporation existing under the laws of the State of Iowa, having a place of business at 112 N. Capitol Street, 6 Gilmore Hall, Iowa City, IA 52242) are co-owners of certain of the Cas9-II Patent Rights set forth on Exhibit 1.31; 

  
 1 

 WHEREAS, (i) pursuant to that certain Operating Agreement by and among Broad,
MIT and Harvard, dated July 1, 2009, MIT and Harvard have authorized Broad to act as their sole and exclusive agent for the purposes of licensing, as applicable, the MIT/Broad Co-Owned Cas9-I Patent Rights and the Harvard/MIT/Broad Co-Owned Cas9-I Patent Rights, as well as their interest in the co-owned Cas9-II Patent Rights, and MIT and Harvard have authorized Broad to enter into this Agreement on their behalf with respect to such patent rights, (ii) pursuant
to that certain Joint Invention Administration Agreement by and between Broad, MIT and Iowa dated December 9, 2014, as amended August 19, 2016, MIT and Iowa have authorized Broad to act as their sole and exclusive agent for the purposes of
licensing their interest in the co-owned Cas9-II Patent Rights, and MIT and Iowa have authorized Broad to enter into this Agreement on their behalf with respect to such
patent rights and (iii) pursuant to that certain Inter-Institutional Agreement by and between Broad and Rockefeller dated February 13, 2017, Rockefeller has authorized Broad to act as its sole and exclusive agent for the purposes of
licensing its interest in the co-owned Cas9-I Patent Rights, and Rockefeller has authorized Broad to enter into this Agreement on its behalf with respect to such patent
rights; 
 WHEREAS, Company wishes to obtain a license under the Cas9-I Patent Rights; 

WHEREAS, Company wishes to obtain a co-exclusive license in the Field under the Cas9-II Institutions’ interest in the Cas9-II Group A Patent Rights and a non-exclusive license under the Cas9-II Institutions’ interest in the Cas9-II Group A Patent Rights and the Cas9-II Group B Patent Rights; 

WHEREAS, the Owner Institutions desire to have products based on the inventions described in the Patent Rights developed and
commercialized to benefit the public; and 
 WHEREAS, Company has represented to the Licensor Institutions, in order to induce the
Licensor Institutions to enter into this Agreement, that Company shall commit itself to the development and commercialization of such products so that public utilization shall result. 

NOW, THEREFORE, the Parties hereto, intending to be legally bound, hereby agree as follows: 

1. DEFINITIONS. 
 Whenever used in
this Agreement with an initial capital letter, the terms defined in this Article 1, whether used in the singular or the plural, shall have the meanings specified below. 

1.1. “Abandoned Patent Rights” has the meaning set forth in Section 6.3.1 

1.2. “Achieved Milestone” has the meaning set forth in Section 4.5.1. 

1.3. “Acquisition Value” means, with respect to a Company Sale, the sum of the Upfront Acquisition Value and the Trailing
Acquisition Value. For the purpose of determining Upfront Acquisition Value or Trailing Acquisition Value, the valuation of any securities or other non-cash assets paid as consideration with respect to a
Company Sale shall be determined by reference to the operative transaction agreement(s) for such Company Sale, provided that, if no such valuation is readily determinable from such operative transaction agreement(s), then: 

  
 2 

 (a) for securities primarily listed and quoted for trading on the New York Stock Exchange,
the NYSE Amex Equities (formerly the American Stock Exchange), the NASDAQ Global Select Market, the NASDAQ Global Market, the NASDAQ Capital Market or other securities exchange, the per share value shall be deemed to be the average of the closing
prices of such securities on such exchange or market, as applicable, over the [**] period ending [**] prior to the Company Sale Date; 
 (b)
for securities primarily listed and quoted for trading on the OTC Bulletin Board or equivalent, the per share value shall be deemed to be the average of the closing bid prices over the [**] period ending [**] prior to the Company Sale Date; 

(c) for all other securities or for assets other than securities or cash, the value shall be determined in good faith by mutual agreement of
the Licensor Institutions and Company (or Company’s acquirer or successor entity, as applicable). If the Parties are not able to agree in good faith on such value within [**] after payment of such securities or property, then such dispute will
be handled pursuant to Section 11.7 of the Agreement. 
 1.4. “Adverse Disclosure” has the meaning set forth in
Section 4.10.3.3. 
 1.5. “Affiliate” means, as to any Person, any other Person that controls, is
controlled by, or is under common control with, such Person. For purposes of this definition only, “control” and, with correlative meanings, the terms “controlled by” and “under common control with” means the
possession, directly or indirectly, of the power to direct the management or policies of an organization or entity, whether through the ownership of voting securities or by contract relating to voting rights or corporate governance, or otherwise.
Without limiting the foregoing, control shall be presumed to exist when a Person (a) owns or directly controls more than fifty percent (50%) of the voting securities or other ownership interest of another Person or (b) possesses, directly
or indirectly, the power to elect or appoint more than fifty percent (50%) of the members of the governing body of the other Person. 
 1.6.
“Ag Product” means any product comprising a plant, plant tissue, plant cell, plant part or plant seed, including any organism in the microbiome used in association with such plant, plant tissue, plant cell, plant part or plant seed,
that is used for agricultural purposes. 
 1.7. “Agreement” has the meaning set forth in the Preamble. 

1.8. “Anti-Dilution Shares” has the meaning set forth in Section 4.4.2. 

1.9. “Anti-Dilution Threshold” means (a) [**] percent ([**]%) of Company’s outstanding capital stock on a Fully-Diluted
Basis or (b) following an Equity Event, if applicable, [**] percent ([**]%) of Company’s outstanding capital stock on a Fully-Diluted Basis. 

  
 3 

 1.10. “Applicable Law” means (a) with respect to a given
jurisdiction, all applicable laws, rules and regulations (including any rules, regulations, guidelines or other requirements of any regulatory authorities) that may be in effect from time to time in such jurisdiction, and (b) with respect to
any jurisdiction that does not have laws, rules or regulations that govern genetically modified organisms (including genetically modified crops), all applicable laws, rules and regulations (including any rules, regulations, guidelines or other
requirements of any regulatory authorities) of the United States federal government that may be in effect from time to time to the extent applicable to genetically modified organisms (including genetically modified crops). 

1.11. “Asset Sale” means the sale, lease, assignment, transfer, exclusive license or other disposition of all or
substantially all of the assets of Company to one or more entities that are not wholly owned subsidiaries of Company. 
 1.12.
“Average Market Capitalization” means the result of (i) the sum of the Market Capitalizations on each Trading Day during a specified period of time divided by (ii) the number of Trading Days during such specified period of
time. 
 1.13. “Bankruptcy Event” means, with respect to any Person, any of the following: 

(a) such Person shall commence a voluntary case or other proceeding seeking liquidation, reorganization or other relief with respect to itself
or its debts under any bankruptcy, insolvency or other similar law now or hereafter in effect or seeking the appointment of a trustee, receiver, liquidator, custodian or other similar official of it or any substantial part of its property, or shall
consent to any such relief or to the appointment of, or taking possession by, any such official in an involuntary case or other proceeding commenced against it, or shall make a general assignment for the benefit of creditors, or shall fail generally
to pay its debts as they become due, or shall take any corporate action to authorize any of the foregoing; 
 (b) an involuntary case or
other proceeding shall be commenced against such Person seeking liquidation, reorganization or other relief with respect to it or its debts under any bankruptcy, insolvency or other similar law now or hereafter in effect or seeking the appointment
of a trustee, receiver, liquidator, custodian or other similar official of it or any substantial part of its property, and such involuntary case or other proceeding shall remain undismissed and unstayed for a period of [**]; or an order for relief
shall be entered against such Person under the federal bankruptcy laws as now or hereafter in effect; or 
 (c) a receiver or trustee shall
be appointed with respect to such Person or all or substantially all of the assets of such Person. 
 1.14. “Broad” has the
meaning set forth in the Preamble. 
 1.15. “Broad Confidential Information” has the meaning set forth in
Section 11.1.1. 
 1.16. “Broad Controlled Patents” has the meaning set forth in the Recitals. 

  
 4 

 1.17. “Calendar Quarter” means each of the periods of three
(3) consecutive calendar months ending on March 31, June 30, September 30 and December 31 during the Term. 
 1.18.
“Calendar Year” means any twelve (12) month period commencing on January 1. 
 1.19. “Cardiovascular
Disease” means atherosclerotic cardiovascular diseases and aortic valve diseases and their prevention through lipid (cholesterol and/or triglyceride) reduction. For the avoidance of doubt, “Cardiovascular Disease” does not
include any inflammatory disease or condition or any form of cancer or symptoms of any of the foregoing, or side effects of such inflammatory disease or condition or cancer or the treatment thereof. 

1.20. “Cardiovascular Disease Field” means, solely with respect to products and processes directed to the Targets, intended
for the prevention or treatment of Cardiovascular Disease (i) using gene therapy, (ii) using editing (including modifying) of Genetic Material or (iii) using targeting of Genetic Material (including targeting of Genetic Material to
modify associated chromatin), either (a) ex vivo for subsequent administration to a human, in the case of the foregoing clause (ii) or (iii) of a product so edited or targeted, or (b) in vivo, by a product administered to a human, in
the case of the foregoing clause (ii) or (iii) of a product that so edits or targets; provided that, the Cardiovascular Disease Field does not include (I) the prevention or treatment of Cardiovascular Disease using a small or large
molecule that (A) was identified or discovered using technology Covered by the Patent Rights, (B) is Covered by (x) a Valid Claim of the Patent Rights Covering the identifying or discovering of small or large molecules, and/or
(y) a product-by-process or similar Valid Claim of the Patent Rights directed to a small or large molecule so identified or discovered, and (C) is not Covered
by any other Valid Claim of the Patent Rights; (II) (A) modifying animals or animal cells for the creation, making, having made, use, sale, offer for sale, having sold, exportation and importation of organs suitable for xenotransplantation into
humans or (B) research and development, and commercialization and other use or exploitation, of products or services in the field of Livestock Applications; (III) production or processing of small or large molecules, including for the
prevention or treatment of Cardiovascular Disease, that are made using technology Covered by the Patent Rights, unless such small or large molecules (xx) are used for (1) gene therapy, (2) editing (including modifying) of Genetic
Material or (3) targeting of Genetic Material (including targeting of Genetic Material to modify associated chromatin), in the case of (2) and (3) to the extent such editing or targeting is achieved through the use of CRISPR Technology or
TALE Technology (other than through the making of such small or large molecules) and in each case (1), (2) and (3) as set forth in clauses (a) and (b) above, and (yy) are not otherwise excluded from this definition of Cardiovascular
Disease Field; (IV) Ag Products; and (V) any products, including without limitation any Ag Product or any product in the field of Livestock Applications, that provide nutritional benefits, unless such products (aa) are regulated by a
Regulatory Authority as a drug or biologic pursuant to Section 505 of the United States Federal Food, Drug, and Cosmetic Act of 1938, as amended, Section 351 of the United States Public Health Service Act of 1944, as amended, or any
successor laws, or equivalent laws or regulations in jurisdictions outside the United States and (bb) are otherwise included in this definition of Cardiovascular Disease Field. In addition, with respect to the Delivery Patent Rights, the
Cardiovascular Disease Field only includes targeting of Genetic Material as set forth in clauses (a) and (b) above if such targeting is related to the use of CRISPR Technology, TALE Technology or zinc finger nuclease technology. 

  
 5 

 1.21. “Cas9 Enabled Product” means any product or process,
other than a Licensed Product, which is or incorporates, or which is made, identified, discovered, developed, optimized, characterized, selected, derived from or determined to have utility, in whole or in part, by the use or modification of,
(a) any Cas9-I Patent Rights or Cas9-II Group A Patent Rights or any technology or invention covered thereby, (b) any Cas9 Licensed Product, (c) any
progeny, modification or derivative of a Cas9 Licensed Product, or (d) any living or nonliving cell, organism, microorganism (including viruses) made or modified through use of a Cas9 Licensed Product or technology covered by the Cas9-I Patent Rights or Cas9-II Group A Patent Rights, or any progeny, clone, modification or derivative of such living or nonliving cell, organism, microorganism (including
viruses); provided, however, that the term “Cas9 Enabled Product” shall not include any large or small molecule that (i) was identified or discovered using a Cas9 Licensed Product or technology Covered by the Cas9-I Patent Rights or Cas9-II Group A Patent Rights and (ii) does not otherwise meet the definition of Cas9 Enabled Product (i.e., it is identified or discovered using
a Cas9 Licensed Product or technology covered by the Cas9-I Patent Rights or Cas9-II Group A Patent Rights but otherwise is not, or does not incorporate, or is not made,
developed, optimized, characterized, selected, derived from or determined to have utility, in whole or in part, by the use or modification of a Cas9 Licensed Product or technology covered by the Cas9-I Patent
Rights or Cas9-II Group A Patent Rights in a way that would cause it to be included in the definition of Cas9 Enabled Product). For clarity, the term “Cas9 Enabled Product” shall also not include any
product or process (other than a Licensed Product), for which the sole use of the Cas9-I Patent Rights or Cas9-II Group A Patent Rights or technology covered thereby in
connection with such product or process was to (x) serve as a control in the development of, or comparator in the pre-clinical development of, such product or process or (y) evaluate the efficacy of
such Cas9-I Patent Rights or Cas9-II Group A Patent Rights or technology covered thereby as applied to such product or process. 

1.22. “Cas9 Licensed Product” means, on a
country-by-country basis, any product or process the making, using, selling, offering for sale, exporting or importing of which product or process in the country in
question is Covered by at least one Valid Claim of the Cas9-I Patent Rights or Cas9-II Group A Patent Rights in that country. If, during the Royalty Term for a given
Cas9 Licensed Product, such Cas9 Licensed Product is no longer Covered by at least one Valid Claim of the Cas9-I Patent Rights or Cas9-II Group A Patent Rights in a
country, and is not Covered by at least one Valid Claim of any other Patent Right in such country, then such Cas9 Licensed Product shall be deemed a Cas9 Enabled Product in such country from that time forward for the purposes of calculating
Milestone Payments under Section 4.5 and Royalties under Section 4.6, unless and until such product or process is again Covered by at least one Valid Claim of the Cas9-I Patent Rights or Cas9-II Group A Patent Rights, at which time it shall again be deemed a Cas9 Licensed Product for such purposes. 

1.23. “Cas9 Patent Rights Categories” means the CRISPR Patent Rights, the TALE Patent Rights and the Delivery
Patent Rights. 

  
 6 

 1.24. “Cas9-I Institution” means
each of the Licensor Institutions, MIT and Rockefeller individually, and “Cas9-I Institutions” means the Licensor Institutions, MIT and Rockefeller, collectively. 

1.25. “Cas9-I Patent Rights” means the patents and patent applications
that are listed on the attached Exhibit 1.25 and any and all divisionals, continuations, continuations-in-part (only to the extent of claims that are entitled to
the priority date of and directed specifically to the subject matter claimed in the applications listed on the attached Exhibit 1.25), substitutes, counterparts and foreign equivalents thereof filed in any country, and any patents issuing thereon
(but in the case of patents issuing on continuations-in-part applications, only to the claims thereof that are entitled to the priority date of and directed specifically
to the subject matter claimed in the applications listed on the attached Exhibit 1.25) and any reissues, reexaminations or extensions thereof. The Cas9-I Patent Rights are the CRISPR Patent Rights, the TALE
Patent Rights and the Delivery Patent Rights. 
 1.26. “Cas9-II Group A Patent
Rights” means the patents and patent applications that are listed on the attached Exhibit 1.31 under the heading “Cas9-II Group A Patent Rights” and any and all divisionals,
continuations, continuations-in-part (only to the extent of claims that are entitled to the priority date of and directed specifically to the subject matter claimed in
the applications listed on the attached Exhibit 1.31 under the heading “Cas9-II Group A Patent Rights”), substitutes, counterparts and foreign equivalents thereof filed in any country, and any
patents issuing thereon (but in the case of patents issuing on continuations-in-part applications, only to the claims thereof that are entitled to the priority date of
and directed specifically to the subject matter claimed in the applications listed on the attached Exhibit 1.31 under the heading “Cas9-II Group A Patent Rights”) and any reissues, reexaminations or
extensions thereof; provided, however, that Cas9-II Group A Patent Rights shall exclude any and all foreign equivalents in [**] related to any patent or patent application denoted with a “+” symbol
on the attached Exhibit 1.31 under the heading “Cas9-II Group A Patent Rights.” 
 1.27.
“Cas9-II Group B Enabled Product” means any product or process, other than a Licensed Product or Cas9 Enabled Product, which is or incorporates, or which is made, identified,
discovered, developed, optimized, characterized, selected, derived from or determined to have utility, in whole or in part, by the use or modification of, (a) any Cas9-II Group B Patent Rights or any
technology or invention covered thereby, (b) any Cas9-II Group B Licensed Product, (c) any progeny, modification or derivative of a Cas9-II Group B Licensed
Product, or (d) any living or nonliving cell, organism, microorganism (including viruses) made or modified through use of a Cas9-II Group B Licensed Product or technology covered by the Cas9-II Group B Patent Rights, or any progeny, clone, modification or derivative of such living or nonliving cell, organism, microorganism (including viruses); provided, however, that the term “Cas9-II Group B Enabled Product” shall not include any large or small molecule that (i) was identified or discovered using a Cas9-II Group B Licensed Product
or technology Covered by the Cas9-II Group B Patent Rights and (ii) does not otherwise meet the definition of Cas9-II Group B Enabled Product (i.e., it is
identified or discovered using a Cas9-II Group B Licensed Product or technology covered by the Cas9-II Group B Patent Rights but otherwise is not, or does not
incorporate, or is not made, developed, optimized, characterized, selected, derived from or determined to have utility, in whole or in part, by the use or modification of a Cas9-II Group B

  
 7 

 
Licensed Product or technology covered by the Cas9-II Group B Patent Rights in a way that would cause it to be included in the definition of Cas9-II Group B Enabled Product). For clarity, the term “Cas9-II Group B Enabled Product” shall also not include any product or process (other than a Cas9-II Group B Licensed Product), for which the sole use of the Cas9-II Group B Patent Rights or technology covered thereby in connection with such product or process was to
(x) serve as a control in the development of, or comparator in the pre-clinical development of, such product or process or (y) evaluate the efficacy of such
Cas9-II Group B Patent Rights or technology covered thereby as applied to such product or process. 

1.28. “Cas9-II Group B Licensed Product” means, on a country-by-country basis, any product that (a) is not a Cas9 Licensed Product and (b) the making, using, selling, offering for sale, exporting or importing of which
product in the country in question is Covered by at least one Valid Claim of the Cas9-II Group B Patent Rights in that country. If, during the Royalty Term for a given
Cas9-II Group B Licensed Product, such Cas9-II Group B Licensed Product is no longer Covered by at least one such Valid Claim in a country, and is not Covered by at
least one Valid Claim of any other Patent right in such country, then such Cas9-II Group B Licensed Product shall be deemed a Cas9-II Group B Enabled Product in such
country from that time forward for the purposes of calculating Milestone Payments under Section 4.5 and Royalties under Section 4.6, unless and until such product is again Covered by at least one Valid Claim of the Cas9-II Patent Rights (other than the Cas9-II Group A Patent Rights), at which time such product shall again be deemed a Cas9-II Group
B Licensed Product for such purposes. 
 1.29. “Cas9-II Group B Patent
Rights” means the patents and patent applications that are listed on the attached Exhibit 1.31 under the heading “Cas9-II Group B Patent Rights” and any and all divisionals,
continuations, continuations-in-part (only to the extent of claims that are entitled to the priority date of and directed specifically to the subject matter claimed in
the applications listed on the attached Exhibit 1.31 under the heading “Cas9-II Group B Patent Rights”), substitutes, counterparts and foreign equivalents thereof filed in any country, and any
patents issuing thereon (but in the case of patents issuing on continuations-in-part applications, only to the claims thereof that are entitled to the priority date of
and directed specifically to the subject matter claimed in the applications listed on the attached Exhibit 1.31 under the heading “Cas9-II Group B Patent Rights”) and any reissues, reexaminations or
extensions thereof; provided, however, that Cas9-II Group B Patent Rights shall exclude any and all foreign equivalents in [**] related to any patent or patent application denoted with a “+” symbol
on the attached Exhibit 1.31 under the heading “Cas9-II Group B Patent Rights.” 
 1.30.
“Cas9-II Institution” means each of Broad, Harvard, MIT and Iowa individually, and “Cas9-II Institutions” means Broad, Harvard, MIT and
Iowa, collectively. 
 1.31. “Cas9-II Patent Rights” means the Cas9-II Group A Patent Rights and the Cas9-II Group B Patent Rights. 

1.32. “Challenging Party” means any Person that brings, assumes or participates in or that knowingly, willfully or recklessly
assists in bringing a Patent Challenge. 

  
 8 

 1.33. “Change of Control” means, with respect to Company,
(a) a merger or consolidation of Company with a Third Party which results in the voting securities of Company outstanding immediately prior thereto ceasing to represent at least fifty percent (50%) of the combined voting power of the surviving
entity immediately after such merger or consolidation, (b) a transaction or series of related transactions in which a Third Party, together with its Affiliates, becomes the owner of fifty percent (50%) or more of the combined voting power of
Company’s outstanding securities other than through issuances by Company of securities of Company in a bona fide financing transaction or series of related bona fide financing transactions, or (c) the sale or other transfer to a Third
Party of all or substantially all of Company’s assets or all or substantially all of Company’s business to which this Agreement relates. 

1.34. “Change of Control Multiplier” has the meaning set forth in Section 4.5.4. 

1.35. “Church IP” means the Patent Rights identified in Exhibit 1.25 as Church IP. 

1.36. “Claims” has the meaning set forth in Section 9.1.1. 

1.37. “Clinical Study” means any clinical study that meets the requirements of a Phase I Clinical Study, Phase II Clinical
Study or Phase III Clinical Study. 
 1.38. “Closing Price” means, with respect to a particular date,
the last reported sales price on (i) such date if such date is a Trading Day, or (ii) if such date is not a Trading Day, the most recent date prior to such date that is a Trading Day. 

1.39. “Common Stock” means the common stock, par value $0.001 per share, of Company. For the purpose of
Section 1.115, Section 4.10.1 and related definitions, “Common Stock” means the equity securities of any of Company or its Affiliates, or any successor thereto, that are Public Securities. 

1.40. “Company” has the meaning set forth in the Preamble. 

1.41. “Company Confidential Information” has the meaning set forth in Section 11.1.1. 

1.42. “Company Notification” has the meaning set forth in Section 3.2.1.  

1.43. “Company Patents” has the meaning set forth in Section 1.129. 

1.44. “Company Sale” means (i) an Asset Sale to one or more Person(s) in a single transaction or series of
related transactions, (ii) a Merger or (iii) an acquisition of at least [**] percent ([**]%) of Company’s shares by a Person or by a Group in a single transaction or a series of related transactions. Notwithstanding anything to the
contrary, (a) any Person that controls, is controlled by, or is under common control with, Company shall not be a “Person” for the purpose of this definition, (b) any Group that is solely comprised of Persons that control, are
controlled by, or are under common control with, Company shall not be a “Group” for the purpose of this definition, and (c) for the purpose of this definition only, “control” and, with correlative meanings, the terms
“controlled by” and “under common control with” means the (1) ownership or control of more than fifty percent (50%) of the voting securities or other ownership interest of another Person or (2) the possession, directly
or indirectly, of the power to elect or appoint more than fifty percent (50%) of the members of the governing body of the other Person. 

  
 9 

 1.45. “Company Sale Date” means the date of closing of a Company Sale. 

1.46. “Company Sale Success Payment” means the amount equal to the sum of all Success Payments that
(i) correspond to Value Triggers that are lower than or equal to the Company Sale Value Trigger and (ii) are unpaid as of the day immediately prior to the Company Sale Date. By way of example, if Company has only paid the first two Success
Payments to the Licensor Institutions (excluding any share issuance pursuant to Section 4.4) as of the day immediately prior to the Company Sale Date, and the Company Sale Value Trigger is [**] dollars ($[**]), then the Company Sale Success
Payment shall be [**] dollars ($[**]). 
 1.47. “Company Sale Value Trigger” means the highest Value Trigger that is lower
than or equal to the Upfront Acquisition Value. By way of example, if the Upfront Acquisition Value is [**] dollars ($[**]), then the Company Sale Value Trigger is [**] dollars ($[**]). 

1.48. “Competing Program” has the meaning set forth in Section 4.6.2.3. 

1.49. “Competing Program Notice” has the meaning set forth in Section 4.6.2.3. 

1.50. “Confidential Information” has the meaning set forth in Section 11.1.1. 

1.51. “Covered” means, with respect to a given product, process, method or service, that a Valid Claim would
(absent a license thereunder or ownership thereof) be infringed by the making, using, selling, offering for sale, importation or other exploitation of such product, process, method or service. With respect to a claim of a pending patent application,
“infringed” refers to activity that would infringe or be covered by such Valid Claim if it were contained in an issued patent. Cognates of the word “Covered” shall have correlative meanings. 

1.52. “Cpf1 Agreement” means that certain Cpf1 License Agreement between Broad and Company dated as of the
Effective Date. 
 1.53. “CRISPR Patent Rights” means the (a) Cas9-I Patent
Rights identified on Exhibit 1.25 as CRISPR Patent Rights and (b) Cas9-II Patent Rights. 

1.54. “CRISPR Technology” means an enzymatically active or inactive Cas9 or Cpf1 endonuclease combined with a
nucleic acid moiety that preferentially binds to a specified DNA sequence and targets the endonuclease to the DNA sequence, where either the endonuclease or nucleic acid moiety can be engineered and/or linked to an effector moiety. 

1.55. “Deductions” means, with respect to a Company Sale, any amounts that are deducted from the gross proceeds,
and thereby reduce the amount paid to the holders of capital stock of Company, including, without limitation: (i) amounts paid to investment bankers, accountants or attorneys in connection with the transaction, (ii) severance or change of
control payments made to employees or directors of Company, (iii) payments made to a Third Party to pay off indebtedness, (iv) liquidation preference payments or (v) amounts placed into escrow or a similar holdback. 

  
 10 

 1.56. “Delivery Patent Rights” means the Cas9-I Patent Rights identified on Exhibit 1.25 as Delivery Patent Rights. 
 1.57.
“Developing Country” means any country identified as a Low-income or Lower-middle-income economy in the World Bank “Country and Lending Groups” classification. 

1.58. “Development Milestones” means, with respect to a given product, the diligence milestones for the
development and commercialization of such product. 
 1.59. “Development Plan” means the plan for the
development and commercialization of Licensed Products attached hereto as Exhibit 3.3, as such plan may be adjusted from time to time pursuant to Section 3.3. 

1.60. “Direct License” has the meaning set forth in Section 10.3.1.2. 

1.61. “Dispute” has the meaning set forth in Section 11.7. 

1.62. “Documentation and Approvals” has the meaning set forth in Section 10.3.4.2. 

1.63. “Editas” means Editas Medicine, Inc. 

1.64. “Editas Cas9-I Exclusive Field” means the “Field,” as
such term is defined in the Editas Cas9-I License Agreement. As of the Effective Date, the definition of “Field” in the Editas Cas9-I License Agreement is as
follows (with all capitalized terms in the following definition having the respective meanings ascribed to such terms in the Editas Cas9-I License Agreement): 

““Field” [as such term is defined in the Editas Cas9-I License Agreement] means the prevention or treatment of human disease (i) using gene therapy, (ii) using editing (including modifying) of Genetic Material or
(iii) using targeting of Genetic Material (including targeting of Genetic Material to modify associated chromatin), either (a) ex vivo for subsequent administration to a human, in the case of the foregoing
clause (ii) or (iii) of a product so edited or targeted, or (b) in vivo, by a product administered to a human, in the case of the foregoing clause (ii) or (iii) of a product that so edits or
targets; provided that, (I) the Field does not include the prevention or treatment of human disease using a small or large molecule that (A) was identified or discovered using technology Covered by
the Patent Rights, (B) is Covered by (x) a Valid Claim of the Patent Rights Covering the identifying or discovering of small or large molecules, and/or (y) a product-by-process or similar Valid Claim of the Patent Rights directed to a small or large molecule so identified or discovered, and (C) is not Covered by
any other Valid Claim of the Patent Rights; (II) the Field does not include (A) modifying animals or animal cells for the creation, making, having made, use, sale, offer for sale, having sold, 

  
 11 

 
exportation and importation of organs suitable for xenotransplantation into humans or (B) research and development, and commercialization and other use or exploitation, of
products or services in the field of Livestock Applications; (III) with respect to the Delivery Patent Rights, the Field only includes targeting of Genetic Material as set forth in clauses (a) and
(b) above if such targeting is related to the use of CRISPR, TALE or zinc finger nuclease technology; (IV) the Field does not include production or processing of small or large molecules, including for the prevention or treatment
of human disease, that are made using technology Covered by the Patent Rights, unless such small or large molecules (xx) are used for (1) gene therapy, (2) editing (including modifying) of
Genetic Material or (3) targeting of Genetic Material (including targeting of Genetic Material to modify associated chromatin), in the case of (2) and (3) to the extent such editing or targeting is achieved
through the use of CRISPR Technology or TALE Technology (other than through the making of such small or large molecules) and in each case (1), (2) and (3) as set forth in clauses (a) and (b) above, and (yy) are
not otherwise excluded from this definition of Field; (V) the Field does not include Ag Products; and (VI) the Field does not include any products, including without limitation any Ag Product or any
product in the field of Livestock Applications, that provide nutritional benefits, unless such products (aa) are regulated by a Regulatory Authority as a drug or biologic pursuant to Section 505 of the United States
Federal Food, Drug, and Cosmetic Act of 1938, as amended, Section 351 of the United States Public Health Service Act of 1944, as amended, or any successor laws, or equivalent laws or regulations in jurisdictions outside the United
States and (bb) are otherwise included in this definition of Field.” 
 The Licensor Institutions will promptly notify Company in writing of any
modifications or amendments to the definition of “Field” in the Editas Cas9-I License Agreement, including by providing written notice of any such modification or amendment which would reduce the
scope of Company’s rights under this Agreement within [**] following the effective date of such modification or amendment. Notwithstanding the foregoing, Licensor Institutions will use good faith efforts to provide prior notice to Company, to
the extent permitted by Editas. 
 1.65. “Editas Cas9-I License
Agreement” means the Amended and Restated Cas9-I License Agreement by and between, on the one hand, Harvard and Broad and, on the other hand, Editas dated December 16, 2016, as amended
from time to time. 
 1.66. “Editas Cas9-II Exclusive Field” means the
“Field,” as such term is defined in the Editas Cas9-II License Agreement. As of the Effective Date, the definition of “Field” in the Editas Cas9-II
License Agreement is as follows (with all capitalized terms in the following definition having the respective meanings ascribed to such terms in the Editas Cas9-II License Agreement): 

““Field” [as such term is defined in the Editas Cas9-II License Agreement] means the prevention or treatment of human disease (i) using gene therapy, (ii) using editing (including modifying) of Genetic Material or
(iii) using targeting of Genetic Material (including targeting of Genetic Material to modify associated chromatin), either (a) ex vivo for subsequent administration to a human, in the case of the foregoing
clause (ii) or (iii) of a product so edited or targeted, or (b) in vivo, by a product administered to a  

  
 12 

 
human, in the case of the foregoing clause (ii) or (iii) of a product that so edits or targets; provided that, (I) the Field does not
include the prevention or treatment of human disease using a small or large molecule that (A) was identified or discovered using technology Covered by the Patent Rights, (B) is Covered by
(x) a Valid Claim of the Patent Rights Covering the identifying or discovering of small or large molecules, and/or (y) a
product-by-process or similar Valid Claim of the Patent Rights directed to a small or large molecule so identified or discovered, and (C) is not
Covered by any other Valid Claim of the Patent Rights; (II) the Field does not include (A) modifying animals or animal cells for the creation, making, having made, use, sale, offer for sale, having sold,
exportation and importation of organs suitable for xenotransplantation into humans or (B) research and development, and commercialization and other use or exploitation, of products or services in the field of Livestock
Applications; (III) the Field does not include production or processing of small or large molecules, including for the prevention or treatment of human disease, that are made using technology Covered by the Patent Rights,
unless such small or large molecules (xx) are used for (1) gene therapy, (2) editing (including modifying) of Genetic Material or (3) targeting of Genetic Material
(including targeting of Genetic Material to modify associated chromatin), in the case of (2) and (3) to the extent such editing or targeting is achieved through the use of CRISPR Technology or TALE Technology (other than through
the making of such small or large molecules) and in each case (1), (2) and (3) as set forth in clauses (a) and (b) above, and (yy) are not otherwise excluded from this definition of Field;
(IV) the Field does not include Ag Products; and (V) the Field does not include any products, including without limitation any Ag Product or any product in the field of Livestock Applications, that provide
nutritional benefits, unless such products (aa) are regulated by a Regulatory Authority as a drug or biologic pursuant to Section 505 of the United States Federal Food, Drug, and Cosmetic Act of 1938, as amended,
Section 351 of the United States Public Health Service Act of 1944, as amended, or any successor laws, or equivalent laws or regulations in jurisdictions outside the United States and (bb) are otherwise included in this definition
of Field.” 
 The Licensor Institutions will promptly notify Company in writing of any modifications or amendments to the definition of
“Field” in the Editas Cas9-II License Agreement, including by providing written notice of any such modification or amendment which would reduce the scope of Company’s rights under this Agreement
within [**] following the effective date of such modification or amendment. Notwithstanding the foregoing, Licensor Institutions will use good faith efforts to provide prior notice to Company, to the extent permitted by Editas. 

1.67. “Editas Cas9-II License Agreement” means the Cas9-II License Agreement by and between Broad and Editas dated December 16, 2016, as amended from time to time. 

1.68. “Effective Date” has the meaning set forth in the Preamble. 

1.69. “Election Date” has the meaning set forth in Section 4.10.3. 

1.70. “Enabled Product” means any product or process that (a) is not a Licensed Product and (b) is a
Cas9 Enabled Product or Cas9-II Group B Enabled Product. 

  
 13 

 1.71. “Enrolled” means that a human research subject has met
the initial screening criteria for inclusion in a clinical study and has been deemed eligible to participate in such clinical study, all as provided in the applicable clinical study protocol(s) and statistical analysis plan(s). For clarity, human
research subjects that have been screened for inclusion in a clinical study and deemed ineligible based on the results of screening shall not be deemed to be “Enrolled” for the purposes of this Agreement. 

1.72. “Enterprise Value” means, with respect to an entity, the equity value of such entity as determined in a Valuation
Analysis. 
 1.73. “Environmental Impact” means any release, spill, emission, leaking, injection, outcross, deposit,
disposal, discharge, dispersal, leaching or migration of material (including any hazardous material, plant, plant part, plant cell, plant tissue or plant seed) into the atmosphere, soil, surface water, groundwater, sewer system or property. 

1.74. “Equity Event” means the first to occur of the following: 

(a) the first bona fide financing of Company, including the first equity financing involving the sale of Company’s preferred stock (the
“Next Financing Shares”) to investors (the “Next Financing”), which results in a Post-Money Valuation of at least $[**], where “Post-Money Valuation” means the product of (i) the highest price
per Next Financing Share paid by investors in the Next Financing, or otherwise the FMV of Common Stock, and (ii) the number of shares of Company capital stock outstanding following the consummation of all closings of the financing calculated on
a Fully-Diluted Basis; and 
 (b) Company’s achievement of a Market Capitalization of at least $500,000,000; and 

(c) Company undergoing a Company Sale where the applicable Acquisition Value exceeds $500,000,000. 

1.75. “Equity Event Shares” has the meaning set forth in Section 4.4.1. 

1.76. “E.U.” means the European Union, including the United Kingdom, regardless of its membership in the
European Union. 
 1.77. “E.U. Major Market Countries” means the United Kingdom (regardless of its membership in the
European Union), Germany, Italy, France and Spain. 
 1.78. “Exchange Act” means the United States Securities
and Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. 
 1.79. “Executive Officers”
has the meaning set forth in Section 11.7. 
 1.80. “FDA” means the United States Food and Drug Administration. 

  
 14 

 1.81. “Field” means, solely with respect to products and
processes directed to the Targets, the prevention or treatment of human disease (i) using gene therapy, (ii) using editing (including modifying) of Genetic Material or (iii) using targeting of Genetic Material (including targeting of
Genetic Material to modify associated chromatin), either (a) ex vivo for subsequent administration to a human, in the case of the foregoing clause (ii) or (iii) of a product so edited or targeted, or (b) in vivo, by a product
administered to a human, in the case of the foregoing clause (ii) or (iii) of a product that so edits or targets; provided that, the Field does not include (I) the prevention or treatment of human disease using a small or large molecule
that (A) was identified or discovered using technology Covered by the Patent Rights, (B) is Covered by (x) a Valid Claim of the Patent Rights Covering the identifying or discovering of small or large molecules, and/or (y) a product-by-process or similar Valid Claim of the Patent Rights directed to a small or large molecule so identified or discovered, and (C) is not Covered by any other
Valid Claim of the Patent Rights; (II) (A) modifying animals or animal cells for the creation, making, having made, use, sale, offer for sale, having sold, exportation and importation of organs suitable for xenotransplantation into humans or
(B) research and development, and commercialization and other use or exploitation, of products or services in the field of Livestock Applications; (III) production or processing of small or large molecules, including for the prevention or
treatment of human disease, that are made using technology Covered by the Patent Rights, unless such small or large molecules (xx) are used for (1) gene therapy, (2) editing (including modifying) of Genetic Material or
(3) targeting of Genetic Material (including targeting of Genetic Material to modify associated chromatin), in the case of (2) and (3) to the extent such editing or targeting is achieved through the use of CRISPR Technology or TALE
Technology (other than through the making of such small or large molecules) and in each case (1), (2) and (3) as set forth in clauses (a) and (b) above, and (yy) are not otherwise excluded from this definition of Field; (IV) Ag
Products; and (V) any products, including without limitation any Ag Product or any product in the field of Livestock Applications, that provide nutritional benefits, unless such products (aa) are regulated by a Regulatory Authority as a drug or
biologic pursuant to Section 505 of the United States Federal Food, Drug, and Cosmetic Act of 1938, as amended, Section 351 of the United States Public Health Service Act of 1944, as amended, or any successor laws, or equivalent laws or
regulations in jurisdictions outside the United States and (bb) are otherwise included in this definition of Field. In addition, with respect to the Delivery Patent Rights, the Field only includes targeting of Genetic Material as set forth in
clauses (a) and (b) above if such targeting is related to the use of CRISPR Technology, TALE Technology or zinc finger nuclease technology. 

1.82. “First Commercial Sale” means the date of the first sale by Company, its Affiliate or a Sublicensee of a Licensed
Product or Enabled Product to a Third Party following receipt of Regulatory Approval in the country in which such Licensed Product or Enabled Product is sold, excluding, however, any sale or other distribution for use in a clinical study, charitable
purposes or compassionate use or similar limited purposes. 
 1.83. “FMV of Common Stock” means (a) if
Company’s shares of Common Stock are Public Securities as of the applicable determination date, the Closing Price, or (b) if Company’s shares of Common Stock are not Public Securities as of the applicable determination date, the value
determined by dividing (1) the Enterprise Value as determined in the most recent Valuation Analysis prior to such date by (2) the total number of issued and outstanding shares of Common Stock (assuming conversion of all outstanding stock
other than common stock into common stock). 

  
 15 

 1.84. “Fully-Diluted Basis” means, as of a specified date,
the number of shares of common stock of Company then-outstanding plus the number of shares of common stock of Company issuable upon exercise or conversion of then-outstanding convertible securities or warrants, options, or other rights to subscribe
for, purchase or acquire from Company any capital stock of Company (which shall be determined without regard to whether such securities or rights are then vested, exercisable or convertible) plus, without duplication, the number of shares reserved
and available for future grant under any then-existing equity incentive plan of Company; provided that, for clarity, “other rights to subscribe for, purchase or acquire” shall not include (i) preemptive or other rights to participate
in new offerings of securities by Company, (ii) obligations under a purchase agreement for preferred stock of Company to acquire additional shares of such preferred stock on the same terms as those purchased at an initial closing upon the
passage of time or meeting (or waiver) of specified Company performance conditions or (iii) anti-dilution provisions that have not been triggered. 

1.85. “Genetic Material” means all DNA (including without limitation DNA in and outside chromosomes) and RNA. 

1.86. “Group” means two or more Persons acting as a partnership, limited partnership, syndicate or other group
for the purposes of acquiring, holding, voting or disposing of the securities of a company. 
 1.87. “Harvard” has the
meaning set forth in the Preamble. 
 1.88. “Harvard Confidential Information” has the meaning set forth in
Section 11.1.1. 
 1.89. “Harvard Controlled Patents” has the meaning set forth in the Recitals. 

1.90. “Harvard/MIT/Broad Co-Owned Cas9-I Patent
Rights” has the meaning set forth in the Recitals. 
 1.91. “HHMI” has the meaning set forth in the Recitals. 

1.92. “HHMI Indemnitees” has the meaning set forth in Section 9.1.3. 

1.93. “HHMI License” has the meaning set forth in Section 2.2.1. 

1.94. “HHMI Names” has the meaning set forth in Section 11.2. 

1.95. “IND” means an FDA Investigational New Drug application, or equivalent application or submission for
approval to conduct human clinical investigations filed with or submitted to a Regulatory Authority in conformance with the requirements of such Regulatory Authority. 

1.96. “Indemnitees” has the meaning set forth in Section 9.1.1. 

1.97. “Indemnitor” has the meaning set forth in Section 9.1.1. 

  
 16 

 1.98. “Ineligible Sublicensees” has the meaning set forth in
Section 10.3.1.2. 
 1.99. “Informed Party” has the meaning set forth in Section 4.6.2.3. 

1.100. “Infringement” has the meaning set forth in Section 7.2. 

1.101. “Initial Public Offering” means a firm-commitment underwritten public offering of equity
securities of Company, or any successor thereto, pursuant to an effective registration statement under the Securities Act (or any equivalent registration statement with respect to jurisdictions outside the United States) following which such equity
securities shall be publicly held. 
 1.102. “Initial Shares” has the meaning set forth in Section 4.4.1. 

1.103. “Institution Names” has the meaning set forth in Section 11.2. 

1.104. “Internal Research Purposes” means use as a research tool for research purposes in the field of human
therapeutics in Company’s or its Affiliates’ internal laboratories, provided, however, that notwithstanding the foregoing, “Internal Research Purposes” shall expressly exclude (a) any human or clinical use, including,
without limitation, any administration into humans or any diagnostic or prognostic use, (b) any human germline modification, including modifying the DNA of human embryos or human reproductive cells, (c) any in vivo veterinary or
livestock use (for clarity, the use of any animal or animal cell in preclinical research shall be included in “Internal Research Purposes”), (d) the manufacture, distribution, importation, exportation, transportation, sale, offer for sale,
marketing, promotion or other exploitation or use of, or as, a testing service, therapeutic or diagnostic for humans or animals, or (e) any use or application relating to the stimulation of biased inheritance of particular genes or traits
within a population of plants or animals. 
 1.105. “Invoicing Entity” has the meaning set forth in Section 1.123. 

1.106. “Iowa” has the meaning set forth in the Recitals. 

1.107. “License Issue Fee” has the meaning set forth in Section 4.2.1. 

1.108. “License Fees” has the meaning set forth in Section 4.3. 

1.109. “Licensed Product” means any product or process that is a Cas9 Licensed Product or Cas9-II Group B Licensed Product. 
 1.110. “Licenses” means (a) this
Agreement and (b) the Cpf1 Agreement; “License” means any of the licenses set forth in the foregoing (a) or (b). 

1.111. “Licensor Institution” and “Licensor Institutions” have the meanings set
forth in the Preamble. 
 1.112. “Licensor Institution Confidential Information” has the meaning set forth in
Section 11.1.1. 

  
 17 

 1.113. “Litigation Expenses” has the meaning set forth in
Section 7.2.3. 
 1.114. “Livestock Applications” means (a) the modification or alteration of
livestock, or of any products, cells or materials derived from livestock, or the use or provision of any processes, methods or services using livestock, or the use of any products, cells or materials derived from livestock, for the purposes of
(i) affecting the fitness of such livestock, including affecting their ability to survive or reproduce, (ii) creating, expressing, transmitting, conferring, improving, or imparting a Trait of interest in such livestock, or
(iii) bioproduction or bioprocessing, or (b) the use, production, alteration or modification of exotic animals, or of any products, cells, tissues or materials derived from exotic animals (including biomaterials derived from such exotic
animals) in or for consumer goods or products. For the purposes of this definition, (A) “livestock” means (1) cattle, sheep, goats, buffalo, llamas, camels, swine, poultry and fowl (including
egg-producing poultry and fowl), dogs, cats and equine animals, (2) animals used for food or in the production of food, (3) animals ordinarily raised or used on the farm or for home use, consumption,
or profit, and (4) fish used for food, and (B) “exotic animals” means snakes, alligators, elephants, camels and other exotic animals but specifically excludes all rodents. Notwithstanding anything in this definition or elsewhere in
this Agreement to the contrary, Livestock Applications does not include (i) the use of any animal or animal cell in preclinical research or (ii) the treatment of animal disease. 

1.115. “Market Capitalization” means, in the event that the shares of Common Stock are Public Securities, with
respect to a particular Trading Day, the closing price per share of Common Stock on such Trading Day multiplied by the number of shares of Common Stock outstanding as set forth on [**], in each case (a) and (b) [**] on or prior to such Trading
Day. For the purpose of this definition, “Company” shall mean Company or any Affiliate of Company that issues Common Stock. 

1.116. “Merger” means any merger or consolidation of Company with or into another Person where the pre-merger or pre-consolidation, as the case may be, stockholders of Company (or, in the event that there is a related tender offer for Company’s shares prior to the
merger or consolidation by a Person or a Group that is a party to such merger or consolidation, the stockholders of Company immediately prior to the commencement of such related tender offer) do not own, immediately after such merger or
consolidation, as the case may be, a majority of the total voting power represented by the outstanding voting securities of the surviving entity. 

1.117. “Milestone Event” means any milestone event indicated in Section 4.5.1 or 4.5.2. 

1.118. “Milestone Explanation” has the meaning set forth in Section 3.5. 

1.119. “Milestone Payment” means any milestone payment indicated in Section 4.5.1 or 4.5.2 corresponding to
any Milestone Event. 
 1.120. “Milestone Plan” has the meaning set forth in Section 3.5. 

1.121. “MIT” has the meaning set forth in the Recitals. 

  
 18 

 1.122. “MIT/Broad Co-Owned Cas9-I Patent Rights” has the meaning set forth in the Recitals. 
 1.123.
“Net Sales” means the gross amount billed or invoiced by or on behalf of Company, its Affiliates, Sublicensees and any Affiliates of such Sublicensees (in each case, the “Invoicing
Entity”) or if not billed or invoiced the gross amount received by the Invoicing Entity, on sales, leases, uses or other transfers of Licensed Products or Enabled Products, less the following to the extent applicable with respect to
such sales, leases or other transfers and not previously deducted from the gross invoice price: (a) customary trade, quantity or cash discounts to the extent actually allowed and taken; (b) amounts actually repaid or credited by reason of
rejection, return or recall of any previously sold, leased or otherwise transferred Licensed Products or Enabled Products; (c) rebates granted or given; (d) allowances for non-collectible
receivables; (e) customer freight charges that are paid by or on behalf of the Invoicing Entity; and (f) to the extent separately stated on purchase orders, invoices or other documents of sale, any sales, value added or similar taxes,
custom duties or other similar governmental charges levied directly on the production, sale, transportation, delivery or use of a Licensed Product or Enabled Product that are paid by or on behalf of the Invoicing Entity, but not including any tax
levied with respect to income; provided that: 
 (a) in no event shall the aggregate amount of all deductions made pursuant to clauses
(d) and (e) above in any Calendar Quarter exceed [**] percent ([**]%) of Net Sales in such Calendar Quarter; 
 (b) Net Sales shall not
include (a) sales or other transfers of any Licensed Product or Enabled Product used for clinical trials or other research, or (b) donations for charity or compassionate use for which an Invoicing Entity does not receive consideration;

 (c) in any transfers of Licensed Products or Enabled Products between an Invoicing Entity and an Affiliate or Sublicensee of such
Invoicing Entity not for the purpose of resale by such Affiliate or Sublicensee, Net Sales shall be equal to the fair market value of the Licensed Products or Enabled Products so transferred, assuming an arm’s length transaction made in the
ordinary course of business; 
 (d) in the event that (i) an Invoicing Entity receives non-cash
consideration for any Licensed Products or Enabled Products, (ii) an Invoicing Entity sells Licensed Products or Enabled Products in a transaction not at arm’s length with a non-Affiliate of an
Invoicing Entity, or (iii) any Licensed Product or Enabled Product is sold by an Invoicing Entity at a discounted price that is substantially lower than the customary prices charged by such Invoicing Entity, Net Sales shall be calculated based
on the fair market value of such consideration or transaction, assuming an arm’s length transaction made in the ordinary course of business, provided that, if a Licensed Product or Enabled Product is sold under circumstances in which the
discounted price is the result of market forces and not a quid pro quo for value other than the monetary consideration charged in such sale of Licensed Product or Enabled Product, such discounted price shall be deemed to be a customary price; 

(e) with respect to any provision hereof requiring a calculation of fair market value, assuming an arm’s length transaction made in the
ordinary course of business, Invoicing Entity may use the average price of the relevant Licensed Product or Enabled Product sold for cash during the relevant period in the relevant country; and 

  
 19 

 (f) sales of Licensed Products or Enabled Products by an Invoicing Entity to its Affiliate
or a Sublicensee for resale by such Affiliate or Sublicensee shall not be deemed Net Sales. Instead, Net Sales shall be determined based on the gross amount billed or invoiced by such Affiliate or Sublicensee upon resale of such Licensed Products or
Enabled Products to any third party that is not an Affiliate or Sublicensee of the Invoicing Entity. 
 1.124. “Next
Financing” has the meaning set forth in Section 1.74. 
 1.125. “Next Financing Shares” has the meaning set
forth in Section 1.74. 
 1.126. “Other IP” has the meaning set forth in Section 7.2. 

1.127. “Owner Institution” means each of the Cas9-I Institutions and Cas9-II Institutions individually, and “Owner Institutions” means the Cas9-I Institutions and the Cas9-II
Institutions, collectively. 
 1.128. “Party” and “Parties” have the meaning
set forth in the Preamble. 
 1.129. “Patent Challenge” means any direct, or indirect through the actions of
another acting on Company’s, its Affiliate’s, or a Sublicensee’s behalf or upon its or their instruction, dispute or challenge, or any knowing, willful, or reckless assistance in the dispute or challenge, of the validity,
patentability, scope, priority, construction, non-infringement, inventorship, ownership or enforceability of any Patent Right or any claim thereof, or opposition or assistance in the opposition of the grant of
any letters patent within the Patent Rights, in any legal or administrative proceedings, including in a court of law, before the United States Patent and Trademark Office or other agency or tribunal in any jurisdiction, or in arbitration including,
without limitation, by reexamination, inter partes review, opposition, interference, post-grant review, nullity proceeding, preissuance submission, third party submission, derivation proceeding or declaratory judgment action. For clarity, a Patent
Challenge shall not include (1) arguments made by Company that (a) distinguish the inventions claimed in patents or patent applications owned or controlled by Company (“Company Patents”) from those claimed in the
Patent Rights but (b) do not disparage the Patent Rights or challenge the validity, scope, or enforceability of the Patent Rights’ claims under applicable patent laws, regulations or administrative rules, in each case (i) in the
ordinary course of ex parte prosecution of the Company Patents or (ii) in inter partes proceedings before the United States Patent and Trademark Office or other agency or tribunal in any jurisdiction (excluding interferences or derivation
proceedings), or in arbitration, wherein the Company Patents have been challenged; (2) arguments or assertions as to whether the Patent Rights Cover a given product, to the extent arising in a Suit brought by the Licensor Institutions;
(3) Company payments of patent costs to another licensor or assignor of Company Patents as required by the agreement under which Company obtained rights to such patent rights, even if the licensor or assignor is engaging in behavior or
presenting arguments that would themselves be considered a Patent Challenge if done by Company; or (4) Company being named as an essential party, real party in interest or other status similar to either of the foregoing, in an interference
between Patent Rights and Company Patents or other adversarial proceeding similar to an interference. 

  
 20 

 1.130. “Patent Rights” means the Cas9-I Patent Rights and the Cas9-II Patent Rights. 
 1.131.
“Person” means an individual, sole proprietorship, partnership, limited partnership, limited liability partnership, corporation, limited liability company, business trust, joint stock company, trust, unincorporated
association, joint venture or other similar entity or organization, including a government or political subdivision, department or agency of a government. 

1.132. “Phase I Clinical Study” means, as to a specific Licensed Product, a study of such product in humans designed to
satisfy the requirements of 21 C.F.R. § 312.21(a), as amended from time to time, or the corresponding regulation in jurisdictions other than the United States. 

1.133. “Phase II Clinical Study” means (a) a preliminary efficacy and safety human clinical study in any country
conducted to evaluate a drug for a particular indication or indications in patients with the disease or condition under study, where at least one of the primary endpoints of such study is an efficacy endpoint, or (b) any human clinical study
that satisfies the requirements of 21 C.F.R. § 312.21(b) in the United States. 
 1.134. “Phase III Clinical Study”
means (a) a human clinical study in any country, whether controlled or uncontrolled, that is performed to obtain Regulatory Approval of a drug after preliminary evidence suggesting effectiveness of the drug under evaluation has been obtained,
and intended to confirm with statistical significance the efficacy and safety of a drug, to evaluate the overall benefit-risk relationship of the drug and to provide an adequate basis for physician labeling, or (b) a human clinical study that
satisfies the requirements of 21 C.F.R. § 312.21(c) in the United States. 
 1.135. “Post-Money Valuation” has the
meaning set forth in Section 1.74. 
 1.136. “Principal Trading Market” means the Trading Market on which the Common
Stock is primarily listed on and quoted for trading. 
 1.137. “Prosecution” means the preparation, filing,
prosecution, issuance and maintenance of the Patent Rights, including continuations, continuations-in-part, divisionals, extensions, reexaminations, inter partes review,
reissues, supplemental examination, appeals, interferences, derivation proceedings, oppositions, all other proceedings before the United States Patent and Trademark Office (including the Patent Trial and Appeal Board) and foreign patent offices, and
any judicial or other appeals of the foregoing. Cognates of the word “Prosecution” have their correlative meanings. 
 1.138.
“Public Securities” means securities that are listed on a national securities exchange registered under the Exchange Act or if not listed on a national securities exchange registered under the Exchange Act, quoted on NASDAQ, OTCQB
or other similar quotation system. 

  
 21 

 1.139. “Record Retention Period” has the meaning set forth in
Section 5.3. 
 1.140. “Regulatory Approval” means, with respect to a particular product or service,
receipt of all regulatory clearances or approvals (which in the case of the E.U. may be through the centralized procedure) required in the jurisdiction in question for the sale of the applicable product or service in such jurisdiction, including
receipt of pricing approval, if any, legally required for such sale. 
 1.141. “Regulatory Authority” means
any applicable government regulatory authority involved in granting clearances or approvals for the manufacturing and marketing of a Licensed Product or Enabled Product, including, in the United States, the FDA. 

1.142. “Replacement Product” has the meaning set forth in Section 4.5.6. 

1.143. “Resale Registration Statement” means a registration statement on Form S-1 or Form S-3 filed by Company with the Securities and Exchange Commission under the Securities Act covering the resale by a Licensor Institution of Success Payment Shares.

 1.144. “Reviewed Patent Rights” means, subject to Section 6.2, the
Cas9-I Patent Rights and Cas9-II Group A Patent Rights within and with respect to the specific patent families identified in Exhibit 1.144 (where each patent family is
listed under a distinct “Broad Reference” or “Harvard Reference” number in Exhibit 1.144). 
 1.145.
“Rockefeller” has the meaning set forth in the Recitals. 
 1.146. “Royalties” has the meaning set forth in
Section 4.6.1. 
 1.147. “Royalty Term” means, on a country-by-country and product-by-product basis, the period commencing on the Effective Date and ending on the later of:
(a) the expiration of the last Valid Claim within the Patent Rights Covering the Licensed Product or (b) the tenth (10th) anniversary of the date of the First Commercial Sale of the Licensed Product or Enabled Product; provided that, for
any Enabled Product that was a Licensed Product, the date of the First Commercial Sale in clause (b) shall be deemed to be the earlier of (i) the date of First Commercial Sale of the Enabled Product that was a Licensed Product, and
(ii) the date of the First Commercial Sale of the Licensed Product that became such Enabled Product. 
 1.148. “Schedule 1
Product” means a Licensed Product or an Enabled Product, in each case for the prevention or treatment of human disease for which the prevalence is fewer than [**] patients in the U.S., or which the Licensor Institutions and Company
otherwise agree in writing shall be considered a Schedule 1 Product based on their review and assessment of the available information. 

  
 22 

 1.149. “Schedule 2 Product” means a Licensed Product or an Enabled Product,
in each case for the prevention or treatment of human disease for which the prevalence is [**] patients or greater in the U.S. 
 1.150.
“Section 409A” means Section 409A of the United States Internal Revenue Code of 1986, as amended, and the rules and regulations promulgated thereunder. 

1.151. “Securities Act” means the United States Securities Act of 1933, as amended, and the rules and regulations promulgated
thereunder. 
 1.152. “Shares” has the meaning set forth in Section 4.4.1. 

1.153. “Single Schedule 1 Product” means all Schedule 1 Products that contain the same active ingredient and no other active
ingredient, or contain the same combination of active ingredients and no other active ingredient, without regard to formulation or dosage. 

1.154. “Single Schedule 2 Product” means all Schedule 2 Products that contain the same active ingredient and no other active
ingredient, or contain the same combination of active ingredients and no other active ingredient, without regard to formulation or dosage. 

1.155. “Skipped Milestone” has the meaning set forth in Section 4.5.1. 

1.156. “Stock Issuance Agreement” means the Stock Issuance Agreement set forth in Exhibit 4.4.1. 

1.157. “Sublicense” means an agreement (other than an assignment of this Agreement in compliance with
Section 11.14) in which Company, an Affiliate of Company or a Sublicensee (a) grants or otherwise transfers any of the rights licensed to Company hereunder or rights relating to Licensed Products or Enabled Products, (b) agrees not to
assert such rights or to sue, prevent or seek a legal remedy for the practice of same, or (c) is under an obligation to grant, assign or transfer any such rights or non-assertion, or to forbear from
granting or transferring such rights, to any other Person, including by means of an option. Agreements expressly considered Sublicenses include (i) licenses, option agreements, “lock up” agreements, right of first refusal agreements, non-assertion agreements, covenants not to sue, distribution agreements that grant or otherwise transfer any rights licensed to Company hereunder, or similar agreements, and (ii) agreements that grant or
otherwise transfer rights licensed to Company under this Agreement along with rights owned by the Company, an Affiliate of Company or a Sublicensee or granted to the Company, an Affiliate of Company or a Sublicensee by a Third Party, but excluded
from this definition of “Sublicense” is any assignment of this Agreement in compliance with Section 11.14. For the avoidance of doubt, if a Sublicense is entered into pursuant to an option or similar agreement that is also a
Sublicense, then the date of execution of the Sublicense shall be the execution date of the option or similar agreement, not the date of the exercise of the option or similar agreement. 

  
 23 

 1.158. “Sublicense Income” means consideration in any form
that Company or an Affiliate receives from a Sublicensee (or is entitled to receive, whether or not offset against amounts payable to a Sublicensee under the Sublicense). Sublicense Income shall include any license fee, license maintenance fee,
minimum royalty payment in excess of earned royalties, option fee, lump sum payment, equity securities received by Company or an Affiliate in connection with a Sublicense, distribution, joint marketing fee, milestone payments and other payments. In
the event Company or an Affiliate receives non-monetary consideration in connection with a Sublicense, Sublicense Income shall be calculated based on the fair market value of such consideration at the time of
the transaction assuming an arm’s length transaction made in the ordinary course of business. 
 Sublicense Income specifically
excludes the following: 
 (a) running royalties on Net Sales; 

(b) payments made by a Sublicensee as consideration for the issuance of equity or debt securities of, or other investment in, Company or an
Affiliate at fair market value, provided that if a Sublicensee pays more than fair market value (such fair market value being determined by reference to the price paid by a non-Sublicensee Third Party for the
equivalent Company security or by a reasonable methodology where such non-Sublicensee Third Party price is not available) for equity or debt securities or other investment in Company or an Affiliate, then the
portion in excess of fair market value shall be considered Sublicense Income; 
 (c) reimbursement for patent expenses (including prosecution
and enforcement expenses) at the Company’s or its Affiliate’s out-of-pocket cost; 

(d) payments to Company or an Affiliate by a Sublicensee under a Sublicense for the purpose of funding the costs of bona fide research and
development of Licensed Products or Enabled Products by the Company or its Affiliates to be conducted on or following the Effective Date of this Agreement and the effective date of such Sublicense, to the extent such amounts are stipulated
in the Sublicense to be allocated specifically to reimburse such costs under the Sublicense, as indicated by inclusion as specific line items in the Sublicense; provided that, to the extent such costs are not actually incurred by Company or its
Affiliates, as evidenced by written documentation of the accounts of Company or its Affiliates, during such definitive periods, such amounts shall be deemed Sublicense Income; and 

(e) payments made by a Sublicensee to Company or an Affiliate solely to the extent such amounts are allocated specifically in the Sublicense as
consideration for a Company Sale or for an option or warrant for a Company Sale at a later date. 
 1.159.
“Sublicensee” means any Third Party of Company to which Company or its Affiliate (or a direct or indirect Sublicensee of Company or its Affiliate) has granted a Sublicense. 

1.160. “Success Payment” has the meaning set forth in Section 4.10.1.2. 

1.161. “Success Payment Shares” has the meaning set forth in Section 4.10.3. 

1.162. “Suit” has the meaning set forth in Section 11.8. 

  
 24 

 1.163. “Suspension” has the meaning set forth in
Section 4.10.3.3. 
 1.164. “TALE Patent Rights” means the Cas9-I Patent Rights
identified on Exhibit 1.25 as TALE Patent Rights. 
 1.165. “TALE Technology” means a Transcription
Activator-Like Effector (TALE) protein DNA binding domain that preferentially binds a specified DNA sequence, and which may also be linked to an effector moiety. 

1.166. “Targets” means the targets set forth in Exhibit 1.166. 

1.167. “Temporary Extension” has the meaning set forth in Section 10.3.1.2. 

1.168. “Term” means the term of this Agreement as set forth in Section 10.1. 

1.169. “Third Party” means any Person that is not (a) an Owner Institution, (b) Company or (c) an
Affiliate of Company. 
 1.170. “Third Party Proposal” has the meaning set forth in Section 3.2.1. 

1.171. “Third Party Proposed Category” has the meaning set forth in Section 3.2.1. 

1.172. “Third Party Proposed Target” has the meaning set forth in Section 3.2.1. 

1.173. “Total Financing Amount” has the meaning set forth in Section 4.4.2. 

1.174. “Trading Day” means (i) a day on which the Common Stock is listed or quoted and traded on its
Principal Trading Market (other than the OTC Bulletin Board), or (ii) if the Common Stock is not listed on a Trading Market (other than the OTC Bulletin Board), a day on which the Common Stock is traded in the over-the-counter market, as reported by the OTC Bulletin Board, or (iii) if the Common Stock is not quoted on any Trading Market, a day on which the Common Stock is quoted in the over-the-counter market as reported in the “pink sheets” by Pink Sheets LLC (or any similar organization or agency succeeding to its functions of reporting prices).
In the event that Common Stock are not Public Securities, Trading Day shall mean a business day in Cambridge, Massachusetts. 
 1.175.
“Trading Market” means whichever of the New York Stock Exchange, the NYSE Amex Equities (formerly the American Stock Exchange), the NASDAQ Global Select Market, the NASDAQ Global Market, the NASDAQ Capital Market or
the OTC Bulletin Board on which the Common Stock is listed or quoted for trading on the date in question. 
 1.176. “Trailing
Acquisition Value” means with respect to a Company Sale, the amount equal to [**] after the Company Sale Date, with such amount grossed up [**], including without limitation [**]. 

1.177. “Trailing Value Receipt Date” means the date of receipt by Company or its stockholders of Trailing Acquisition Value.

  
 25 

 1.178. “Trait” means any biochemical, physiological, physical
or other attribute or phenotype of a cell, plant or plant component, or animal or animal component. 
 1.179. “Trigger
Date” means [**]. 
 1.180. “Trigger Date Value Trigger” has the meaning set forth in Section 1.179.

 1.181. “Upfront Acquisition Value” means, with respect to a Company Sale, the amount equal to [**] in a
Company Sale, with such amount grossed up [**]. Any portion of such consideration that is held back or placed into escrow as security for potential indemnification or other claims in connection with such Company Sale shall be [**] the Upfront
Acquisition Value, but shall be [**] the Trailing Acquisition Value if, when and to the extent such consideration is released to Company or its stockholders. 

1.182. “Valid Claim” means: (a) a claim of an issued and unexpired patent within the Patent Rights that has
not been (i) held permanently revoked, unenforceable, unpatentable or invalid by a decision of a court or governmental body of competent jurisdiction, unappealable or unappealed within the time allowed for appeal, (ii) disclaimed or
rendered unenforceable through disclaimer or otherwise, or (iii) abandoned, or (b) a pending claim of a pending patent application within the Patent Rights, which claim has not been pending for more than [**] from the first substantive
office action with respect to the pending claim and has not been abandoned or finally rejected without the possibility of appeal or refiling or without such appeal having been taken or refiling having been made within the applicable time periods.
Notwithstanding the foregoing, (i) the [**] pendency period set forth in clause (b) above shall only apply if, after [**] of prosecution on the merits of a given application, Company notifies the Licensor Institutions in writing that it
does not believe that Licensor Institutions should continue to prosecute such application and the Licensor Institutions continue to do so at their discretion, and (ii) if the prosecution of a given application is interrupted and/or delayed
(A) by a patent office or (B) due to a Patent Challenge or a patent office proceeding such as an interference, appeal or opposition, then in each case (A) and (B) the pendency of such Patent Challenge or proceeding(s) shall not be
included in the [**] time period set forth above. The invalidity of a particular claim in one or more countries shall not invalidate such claim in any remaining countries. For the avoidance of doubt, a pending claim of a patent application filed
pursuant to the Patent Cooperation Treaty shall be considered pending in all designated jurisdictions. 
 1.183. “Valuation
Analysis” means, with respect to an entity, a valuation analysis of such entity conducted by an independent valuation expert for purposes of compliance with Section 409A and approved by the Board of Directors (or equivalent body) of
such entity in good faith. 
 1.184. “Value Trigger” means each amount shown in the column labeled “Value Trigger”
in Section 4.10.1.2. 

  
 26 

 2. LICENSE. 

2.1 License Grants. 
 2.1.1
License Grant in the Field. Subject to Section 2.2 and the other terms and conditions of this Agreement, including the restrictions set forth in Section 2.8, each Licensor Institution hereby grants to Company, with respect to the
Targets, a worldwide, royalty-bearing license, sublicensable solely in accordance with Section 2.5 below, under the (A) Cas9-I Institutions’ interests in the
Cas9-I Patent Rights solely to make, have made, use, have used, sell, offer for sale, have sold, export and import those Cas9 Licensed Products, the making, using, selling, offering for sale, exporting or
importing of which is Covered by at least one Valid Claim of the Cas9-I Patent Rights, (B) in the case of Broad, the Cas9-II Institutions’ interests in the Cas9-II Group A Patent Rights solely to make, have made, use, have used, sell, offer for sale, have sold, export and import those Cas9 Licensed Products, the making, using, selling, offering for sale, exporting or
importing of which is Covered by at least one Valid Claim of the Cas9-II Group A Patent Rights, and (C) in the case of Broad, the Cas9-II Institutions’
interests in the Cas9-II Group B Patent Rights solely to make, have made, use, have used, sell, offer for sale, have sold, export and import those Cas9 Licensed Products and
Cas9-II Group B Licensed Products, the making, using, selling, offering for sale, exporting or importing of which is Covered by at least one Valid Claim of the Cas9-II
Group B Patent Rights, in each case ((A), (B) and (C)) solely for use in the Field, except that (a) the licenses granted under this Section 2.1.1 exclude (i) the field of modifying animals or animal cells for the creation, making,
having made, use, sale, offer for sale, having sold, exportation and importation of organs suitable for xenotransplantation into humans and (ii) research and development, and commercialization and other use or exploitation, of products or
services in the field of Livestock Applications; and (b) the licenses granted under this Section 2.1.1 exclude (x) human germline modification, including intentionally modifying the DNA of human embryos or human reproductive cells,
and (y) the stimulation of biased inheritance of particular genes or traits within a population of plants or animals. The licenses granted under this Section 2.1.1 will be (aa) co-exclusive (with
Editas, or its successor or assign, or another Person (the identity of which other Person Broad will use good faith efforts to disclose to Company), who in each of the foregoing cases, for the avoidance of doubt, has the right to sublicense), with
respect to the license under the Cas9-I Institutions’ interests in the Cas9-I Patent Rights and the Cas9-II
Institutions’ interests in the Cas9-II Group A Patent Rights, and (bb) non-exclusive with respect to the license under the
Cas9-II Institutions’ interests in the Cas9-II Group B Patent Rights. 

2.1.2 Non-Exclusive License Grant. Subject to Section 2.2 and the other terms and
conditions of this Agreement, including the restrictions set forth in Section 2.8, each Licensor Institution hereby grants to Company a non-exclusive, worldwide, royalty-bearing license, sublicensable
solely in accordance with Section 2.5 below, under the Cas9-I Institutions’ interests in the Cas9-I Patent Rights and, in the case of Broad, the Cas9-II Institutions’ interests in the Cas9-II Patent Rights (a) for Internal Research Purposes, (b) for research, development and commercialization of products
(including Enabled Products) for the prevention or treatment of human disease outside of the Editas Cas9-I Exclusive Field (in the case of the Cas9-I Institutions’
interests in the Cas9-I Patent Rights) and outside of the Editas Cas9-II Exclusive Field (in the case of the Cas9-II
Institutions’ interests in the Cas9-II Patent Rights), respectively, 

  
 27 

 
and (c) with respect to the Targets, to make, have made, use, have used, sell, offer for sale, have sold, export and import Enabled Products for use within the Field; provided, however, that
notwithstanding the foregoing, (x) the license granted under this Section 2.1.2 excludes (i) human germline modification, including intentionally modifying the DNA of human embryos or human reproductive cells, (ii) the
stimulation of biased inheritance of particular genes or traits within a population of plants or animals, (iii) Ag Products, and (iv) any products, including without limitation any Ag Product or any product in the field of Livestock
Applications, that provide nutritional benefits, unless such products (aa) are regulated by a Regulatory Authority as a drug or biologic pursuant to Section 505 of the United States Federal Food, Drug, and Cosmetic Act of 1938, as amended,
Section 351 of the United States Public Health Service Act of 1944, as amended, or any successor laws, or equivalent laws or regulations in jurisdictions outside the United States and (bb) are otherwise included in the definition of Field, and
(y) the license granted by Harvard under the Church IP excludes (A) the field of modifying animals or animal cells for the creation, making, having made, use, sale, offer for sale, having sold, exportation and importation of organs
suitable for xenotransplantation into humans and (B) research and development, and commercialization and other use or exploitation of products or services, in the field of Livestock Applications. 

2.2 Reservation of Rights. Notwithstanding anything herein to the contrary: 

2.2.1 Government and Non-Profit Rights. Notwithstanding anything to the contrary herein, any and
all licenses and other rights granted under this Agreement are limited by and subject to (a) any rights or obligations of the Owner Institutions and United States government under 35 U.S.C. §§
200-212 and 37 CFR Part 401 et seq.; any right granted in this Agreement greater than that permitted under 35 U.S.C. §§ 200-212 and 37 CFR Part 401 et seq.
shall be subject to modification as may be required to conform to the provisions of those statutes and regulations, and (b) the Owner Institutions’ reservation of the right, for each of the Owner Institutions and other academic, government
and non-profit entities, to make, use and practice the Patent Rights for research, teaching, or educational purposes. Further, Company acknowledges that it has been informed that certain of the Cas9-I Patent Rights were developed, at least in part, by employees of HHMI and that HHMI has a fully paid-up, non-exclusive,
irrevocable, worldwide license to exercise any intellectual property rights with respect to such Cas9-I Patent Rights for research purposes, with the right to sublicense to
non-profit and governmental entities (the “HHMI License”). For the avoidance of doubt, the HHMI License includes, but is not limited to, (i) the right to make, use, perform and practice
the subject matter described in such Cas9-I Patent Rights for research, teaching, educational and scholarly purposes (including, but not limited to, the right to enter into projects permitted under 15 U.S.C.
3710a (the CRADA statute) or other sponsored research projects or collaborations whether or not such collaborations are formal or informal), in all fields in all territories at any time without restriction; and (ii) the right to research,
develop, make, have made, use, distribute, import or otherwise practice such Cas9-I Patent Rights and applicable Cas9 Licensed Products as research products or research tools, or for research purposes in the
Field. Any and all licenses and other rights granted under this Agreement are explicitly made subject to the HHMI License. 

  
 28 

 2.2.2 Research Reservation. Notwithstanding anything to the contrary herein, in
addition to the reservation of rights under Section 2.2.1, the co-exclusive license granted to Company in the Field under Section 2.1.1 of this Agreement is subject to: 

2.2.2.1 The Owner Institutions’ reservation of the right, for each of them and for other not-for-profit research organizations and government agencies, to make, use, perform and practice the subject matter described in the Patent Rights for research, teaching, educational and scholarly purposes
(including, but not limited to, the right to enter into projects permitted under 15 U.S.C. 3710a (the CRADA statute) or other sponsored research projects or collaborations whether or not such collaborations are formal or informal), in all fields in
all territories at any time without restriction. For clarity, sponsored research funded by a commercial entity shall be considered research for purposes of this Section 2.2.2 and the HHMI License. 

2.2.2.2 The Owner Institutions’ reservation of the right, for each of them and for any Third Party (including non-profit and for-profit entities), to research, develop, make, have made, use, offer for sale, sell, have sold, import or otherwise exploit the Patent Rights and Licensed
Products as research products or research tools, or for research purposes in the Field. Without otherwise limiting or expanding the foregoing, for the purposes of this Section 2.2.2.2, “research purposes” shall not be interpreted to
include the administration of a Licensed Product into any human. 
 2.3 Affiliates. The licenses granted to Company under
Section 2.1 include the right to have some or all of Company’s rights or obligations under this Agreement exercised or performed by one or more of Company’s Affiliates on Company’s behalf; provided, however, that: 

2.3.1 Company shall notify the Licensor Institutions in writing [**] in advance of any Affiliate exercising or performing any of Company’s
rights or obligations under this Agreement; 
 2.3.2 prior to any Affiliate exercising or performing any of Company’s rights or
obligations under this Agreement, such Affiliate shall agree in writing with Company to be bound by the terms and conditions of this Agreement as if it were Company hereunder, including specific written agreement (a) to indemnify, defend and
hold Indemnitees and HHMI Indemnitees harmless, and carry insurance, under the same terms as Article 9 of this Agreement, and (b) that the Owner Institutions and HHMI are express third party beneficiaries of such writing; 

2.3.3 no such Affiliate shall be entitled to grant, directly or indirectly, to any Person any right of whatever nature under, or with respect
to, or permitting any use or exploitation of, any of the Patent Rights, including any right to develop, manufacture, market or sell Licensed Products (a) if doing so would result in a Sublicense of Company’s rights through more than [**]
tiers (including the grant of rights from Company to the applicable Affiliate) and (b) unless such grant of rights is a Sublicense and includes all applicable restrictions and conditions on the granting of Sublicenses as set forth herein; 

  
 29 

 2.3.4 any act or omission by an Affiliate of Company shall be deemed an act or omission by
Company hereunder, and Company shall be responsible for each of its Affiliates complying with all obligations of Company under this Agreement (including without limitation all restrictions placed on Company herein); and 

2.3.5 any assumption of rights or obligations by Affiliates of Company under this Agreement shall not relieve Company of any of its obligations
under this Agreement. 
 2.4 Right to Subcontract. If Company desires to exercise any of the rights or obligations that Company may
have under this Agreement by subcontracting the exercise or performance of all or any portion of such rights and obligations on Company’s behalf, Company shall be entitled to do so, provided that (a) such contract service providers obtain
no rights in or to the Patent Rights except for the limited purpose of performing the applicable contracted services on behalf of the Company, (b) any subcontract granted or entered into by Company as contemplated by this Section 2.4 of
the exercise or performance of all or any portion of the rights or obligations that Company may have under this Agreement shall not relieve Company from any of its obligations under this Agreement, (c) any act or omission by a subcontractor of
Company shall be deemed an act or omission by Company hereunder, and (d) Company shall be responsible for each of its subcontractors complying with all obligations of Company under this Agreement (including without limitation all restrictions
placed on Company herein); provided that any subcontract or other agreement that, in whole or in part, grants or otherwise transfers any of the rights licensed to Company hereunder, or otherwise falls under the definition of a Sublicense, shall be
deemed a Sublicense and not a subcontract hereunder and shall be subject to all restrictions and requirements applicable to Sublicenses under this Agreement. 

2.5 Sublicenses. 
 2.5.1
Sublicense Rights. Company shall be entitled to sublicense (through up to [**] tiers) the rights granted to it under Section 2.1 hereof to Third Parties solely within the Field and subject to the terms of this Section 2.5, provided
that Company and its Sublicensees may only sublicense their rights under Section 2.1.2 together with a sublicense of their rights under Section 2.1.1. 

2.5.2 Sublicense Agreements. Company shall ensure that any Sublicense shall be on terms and conditions in compliance with, and not
inconsistent with, the terms of this Agreement. Notwithstanding any Sublicense, Company shall remain primarily liable to the Licensor Institutions for all of Company’s duties and obligations contained in this Agreement, and any act or omission
of a Sublicensee which would be a breach of this Agreement if performed by Company shall be deemed to be a breach by Company of this Agreement. Any Sublicenses granted by Company may include the right to grant and authorize further Sublicenses
(including to Affiliates of the Sublicensee), in each case subject to all applicable restrictions and conditions on the granting of Sublicenses herein. Subject to the provisions of Section 10.3.1.2 hereof, all Sublicenses shall automatically
terminate effective upon termination of this Agreement unless otherwise agreed in writing by the Licensor Institutions or as provided in Section 10.3.1.2. Company shall furnish the Licensor Institutions with a fully-executed, unredacted copy of
any Sublicense agreement, promptly upon execution of such Sublicense; provided that Company may redact from such copy (a) the identity of a Target selected for 

  
 30 

 
research, development or commercialization under the Sublicense and (b) other proprietary non-public technical information of Company or the
applicable Sublicensee. Notwithstanding the foregoing, Company shall not redact any information reasonably necessary for the Licensor Institutions to evaluate and confirm compliance of such Sublicense with the terms and conditions of this Agreement.
The Licensor Institutions shall use such copies solely for the purpose of monitoring Company’s and its Sublicensees’ compliance with their obligations, and enforcing the Licensor Institutions’ rights, under this Agreement. Any
Sublicense shall require a written agreement, which shall be subject and subordinate to the terms and conditions of this Agreement, and shall contain, among other things, the following: 

2.5.2.1 all provisions necessary to ensure Company’s ability to perform its obligations under this Agreement; 

2.5.2.2 a section requiring Sublicensee to indemnify, defend and hold Indemnitees and HHMI Indemnitees harmless, and carry insurance, under the
same terms set forth in Article 9 of this Agreement; 
 2.5.2.3 a statement that the Licensor Institutions are intended third party
beneficiaries of such Sublicense for the purpose of enforcing all patent challenge, indemnification, and insurance provisions of such Sublicense and enforcing the right to terminate such Sublicense for breach of the patent challenge, indemnification
and insurance provisions of such Sublicense; and a statement that HHMI and each other Owner Institution are intended third party beneficiaries of such Sublicense for the purpose of enforcing HHMI and such Owner Institution’s respective rights,
including indemnification and insurance provisions, under this Agreement; 
 2.5.2.4 a provision stating that in the event Sublicensee
directly or indirectly brings, assumes, or participates in, or knowingly, willfully or recklessly assists in bringing, a Patent Challenge then Company shall be entitled to terminate the Sublicense; 

2.5.2.5 a provision specifying that, in the event of termination of the licenses set forth in Sections 2.1 in whole or in part (e.g., as to one
license or the other, or termination in a particular country), any existing Sublicense agreement shall terminate to the same extent of such terminated license, subject to Sublicensee’s right to receive a Direct License from the Licensor
Institutions in accordance with Section 10.3.1.2 hereof; 
 2.5.2.6 a provision prohibiting the Sublicensee from sublicensing its rights
under such Sublicense agreement (a) if doing do would result in a Sublicense of Company’s rights through more than [**] tiers and (b) unless such further sublicense includes all applicable restrictions and conditions on the granting
of Sublicenses as set forth herein; 
 2.5.2.7 a provision requiring Sublicensee to comply with Section 8.1 (Compliance with Law) and
Section 11.2 (Use of Name) of this Agreement; and 

  
 31 

 2.5.2.8 a provision prohibiting the Sublicensee from assigning the Sublicense
agreement without the prior written consent of the Licensor Institutions, except that Sublicensee may assign the Sublicense agreement without such prior written consent to the same extent Company may assign this Agreement under Section 11.14.

 2.6 U.S. Manufacturing. Company agrees that any Licensed Products used or sold in the United States that are subject to 35
U.S.C. §§ 201-211 and the regulations promulgated thereunder, as amended, or any successor statutes or regulations shall, to the extent required by law, be manufactured substantially in the United
States. 
 2.7 No Other Grant of Rights. Except as expressly provided herein, nothing in this Agreement shall be construed to confer
any ownership interest, license or other rights upon Company or its Affiliates or Sublicensees by implication, estoppel or otherwise as to any technology, intellectual property rights, products or biological materials of the Licensor Institutions or
MIT, or any other entity, regardless of whether such technology, intellectual property rights, products or biological materials are dominant, subordinate or otherwise related to any Patent Rights. 

2.8 Additional Limitations on Exercise of License Rights. 

2.8.1 Germline Modification. Company will not use the Patent Rights for human germline modification, including intentionally modifying
the DNA of human embryos or human reproductive cells. 
 2.8.2 Gene-Drive Applications. Company will not use the Patent Rights for the
stimulation of biased inheritance of particular genes or traits within a population of plants or animals. 
 2.8.3 General
Restriction. Without limiting the foregoing Sections 2.8.1 and 2.8.2, Company will not use the Patent Rights except in accordance with the terms of the licenses granted under Section 2.1. 

3. DEVELOPMENT AND COMMERCIALIZATION. 

3.1 Diligence; Development Milestones. Company shall use commercially reasonable efforts or shall cause at least one of its Affiliates
or Sublicensees to use commercially reasonable efforts: (a) to research and develop Cas9 Licensed Products within the Field; (b) to introduce Cas9 Licensed Products within the Field into the commercial market; and (c) to market Cas9
Licensed Products within the Field following such introduction into the market and make such Cas9 Licensed Products reasonably available to the public. In addition, Company, by itself or through any of its Affiliates or Sublicensees, shall achieve
each of the Development Milestones specified in Exhibit 3.1 within the corresponding time period specified in Exhibit 3.1. 

  
 32 

 3.2 Inclusive Innovation Model. 

3.2.1 If at any time after the second anniversary of the Effective Date a Third Party makes a bona fide proposal (a “Third Party
Proposal”) to the Licensor Institutions for developing (a) a product within the Field, but outside the Cardiovascular Disease Field, with respect to a specific Target (which specific Target, the “Third Party Proposed
Target”) or (b) a product within the Field, but outside the Cardiovascular Disease Field, and within a specific Cas9 Patent Rights Category (the “Third Party Proposed Category”) that, in each case, may require or for
which a license under any of the Patent Rights for which Company’s license hereunder is co-exclusive is desired, then in each case ((a) or (b)), if the Licensor Institutions are interested in having such
product developed and commercialized, the Licensor Institutions may notify Company of the Third Party Proposal, and shall include in such notification information regarding the Third Party Proposal, including the Third Party Proposed Target or Third
Party Proposed Category, as applicable, specified in such Third Party Proposal and, to the extent permitted by such Third Party, the identity of the Third Party that provided the Third Party Proposal (which identity shall be deemed to be Licensor
Institution Confidential Information). Within [**] after the receipt of such notification from the Licensor Institutions, Company shall notify the Licensor Institutions regarding whether it or any of its Affiliate or Sublicensees is (or is
interested in) developing Cas9 Licensed Products in the Field with respect to the Third Party Proposed Target specified in the Third Party Proposal or within the Third Party Proposed Category specified in the Third Party Proposal, as applicable (the
“Company Notification”). 
 3.2.2 If Company notifies the Licensor Institutions within such [**] period that it or any of
its Affiliates or Sublicensees is currently developing or is interested in developing Cas9 Licensed Products in the Field with respect to the Third Party Proposed Target specified in the Third Party Proposal or within the Third Party Proposed
Category specified in the Third Party Proposal, as applicable, the Parties will negotiate in good faith and agree, during the [**] following the Company Notification (or such longer time as will be agreed to by the Parties in writing), upon a
development plan with respect to the development and commercialization of such Third Party Proposed Target or Third Party Proposed Category, as applicable, which development plan will be similar to the Development Plan with respect to other Licensed
Products developed by Company, subject to necessary adjustments, and will include reasonable milestones. If the Parties agree on such development plan and milestones within such [**] period, Company shall maintain its co-exclusive license(s) hereunder with respect to such Third Party Proposed Target or Third Party Proposed Category, as applicable, but shall be obligated (a) to use commercially reasonable efforts to develop
and commercialize at least one Cas9 Licensed Product in the Field with respect to such Third Party Proposed Target or Third Party Proposed Category, as applicable, in accordance with such new development plan and (b) to meet the milestones in
such development plan with at least one such Cas9 Licensed Product. For the avoidance of doubt, Company’s development plan for the Third Party Proposed Target or Third Party Proposed Category may be for development and commercialization within
or outside the Cardiovascular Disease Field. 
 3.2.3 If (a) Company fails to send the Company Notification to the Licensor Institutions
under Section 3.2.2 within [**] following its receipt of a notice from the Licensor Institutions regarding a Third Party Proposal, (b) the Parties do not agree on a development plan and milestones that are acceptable to the Licensor
Institutions, in their reasonable judgment, within the time period set forth in Section 3.2.2, or (c) the Parties agree on such a development plan and milestones within such time period, but Company thereafter fails to comply in any
material respect with such mutually agreed development and commercialization obligations, and fails to cure such noncompliance after notice from the Licensor Institutions within the time 

  
 33 

 
periods specified in Section 3.5 (applied mutatis mutandis), then in each case ((a)-(c)), (y) the Licensor Institutions will be free to terminate Company’s rights under
Section 2.1 with respect to the Third Party Proposed Target or Third Party Proposed Category, as applicable, specified in the applicable Third Party Proposal, and (z) the Licensor Institutions will be free to grant to Third Parties
licenses within the Field (i) under the Patent Rights that are exclusively or co-exclusively licensed to Company with respect to the Third Party Proposed Target or (ii) under the Patent Rights that
are exclusively or co-exclusively licensed to Company within the Third Party Proposed Category, as applicable, provided that such Third Party licenses do not grant rights to commercialize products intended for
use in the Cardiovascular Disease Field. 
 3.2.4 If Company states in the Company Notification that it and its Affiliates and Sublicensees
are not (and are not interested in) developing Cas9 Licensed Products with respect to the Third Party Proposed Target specified in the Third Party Proposal or within the Third Party Proposed Category specified in the Third Party Proposal, as
applicable, but that it wishes to grant a Sublicense to such Third Party with respect to the Third Party Proposed Target or the Third Party Proposed Category, as applicable, then (a) Broad will use good faith efforts to promptly disclose to
Company, to the extent permitted by such Third Party, the identity of the Third Party that provided the Third Party Proposal (which identity shall be deemed to be Licensor Institution Confidential Information) and (b) Company will have [**] (or
such longer time as will be agreed to by the Parties in writing) to negotiate and enter into such a Sublicense agreement with such Third Party in the Field; provided, however, that if Company demonstrates that it and such Third Party have entered
into a term sheet with respect to such a Sublicense agreement during such [**], Company will be entitled to extend the period for the execution of a binding Sublicense agreement by an additional [**] (or such longer time as will be agreed to by the
Parties in writing). 
 3.2.5 If Company fails to enter into such a Sublicense agreement within such [**] period or such [**] period (or such
longer time as will be agreed to by the Parties in writing), as applicable, Company shall promptly (but in any event within [**] of the end of such period) provide the Licensor Institutions in writing an explanation for such failure along with the
proposed terms last offered by Company to the prospective Sublicensee. If the Licensor Institutions determine in their good faith judgment that the terms last offered by Company to such Third Party were commercially reasonable, the Licensor
Institutions shall notify Company of such determination. Alternatively, if the Licensor Institutions determine in their good faith judgment that the terms last offered by Company to such Third Party were not commercially reasonable, the
Licensor Institutions shall notify Company of such determination, including Licensor Institutions’ reasoning therefor. In either case, the Licensor Institutions shall provide Company with an additional [**] to enter into a Sublicense with such
Third Party. If Company reasonably believes that its entry into a Sublicense agreement with such Third Party on commercially reasonable terms would require Company to make payments under this Agreement with respect to such Sublicense agreement in
excess of the payments that Company would receive under such Sublicense agreement, then (a) Company shall promptly notify the Licensor Institutions thereof, and (b) the Parties shall promptly discuss in good faith potential solutions to
address such outcome. In any event, if Company fails to enter into an agreement with such Third Party within such additional [**] period, then (y) the Licensor Institutions will be free to terminate Company’s rights under Section 2.1
with respect to the Third Party Proposed Target or 

  
 34 

 
Third Party Proposed Category, as applicable, specified in the applicable Third Party Proposal, and (z) the Licensor Institutions will be free to grant to Third Parties licenses within the
Field (i) under the Patent Rights that are exclusively or co-exclusively licensed to Company with respect to the Third Party Proposed Target or (ii) under the Patent Rights that are exclusively or co-exclusively licensed to Company within the Third Party Proposed Category, as applicable, provided that such Third Party licenses do not grant rights to commercialize products intended for use in the
Cardiovascular Disease Field. 
 3.3 Development Plan; Adjustments. The Development Plan for the development and commercialization of
Licensed Products and Enabled Products is attached hereto as Exhibit 3.3. Company shall be entitled, from time to time, to make such commercially reasonable adjustments to the Development Plan as Company believes, in its good faith judgment, are
needed in order to improve Company’s ability to meet the Development Milestones in Exhibit 3.1. 
 3.4 Reporting. Within [**]
after the end of each Calendar Year, Company shall furnish the Licensor Institutions with: 
 3.4.1 (i) a written report summarizing its, its
Affiliates’ and its Sublicensees’ efforts during the prior year to develop and commercialize Cas9 Licensed Products within the Field and (ii) a written report summarizing its, its Affiliates’ and its Sublicensees’ efforts
during the prior year to develop and commercialize Cas9-II Group B Licensed Products within the Field, including: (a) research and development activities, including information regarding specific Licensed
Products and Enabled Products in development and their therapeutic applications; (b) status of applications for Regulatory Approvals; (c) commercialization efforts; and (d) marketing efforts; which report must contain a sufficient
level of detail for the Licensor Institutions to assess whether Company is in compliance with its obligations under Article 3 and a discussion of intended efforts for the then-current year. Together with each report prepared and provided under this
Section 3.4.1, Company shall provide the Licensor Institutions with a copy of the then-current Development Plan which shall include sufficient detail to enable the Licensor Institutions to assess what Licensed Products and Enabled Products are
in development and the status of such development; and 
 3.4.2 (i) a brief written report summarizing its, its Affiliates’ and its
Sublicensees’ efforts during the prior year to develop and commercialize Cas9 Licensed Products and Cas9 Enabled Products for the prevention or treatment of human disease outside the Field and (ii) a brief written report summarizing its,
its Affiliates’ and its Sublicensees’ efforts during the prior year to develop and commercialize Cas9-II Group B Licensed Products and Cas9-II Group B Enabled
Products for the prevention or treatment of human disease outside the Field. 
 3.5 Failure to Meet Development Milestone; Opportunity to
Cure. If Company believes that, despite using commercially reasonable efforts, it will not achieve a Development Milestone, it may notify the Licensor Institutions in writing in advance of the relevant deadline. Company shall include with such
notice (a) a reasonable explanation of the reasons for such failure (lack of finances or development preference for a non-Cas9 Licensed Product shall not constitute reasonable basis for such failure)
(“Milestone Explanation”) and (b) a reasonable, detailed, written plan for promptly achieving a reasonable extended and/or amended milestone, which plan shall include information, if applicable, regarding which Licensor
Institution’s Cas9-I Patent Rights or Cas9-II Patent Rights Cover any Cas9 Licensed Product that will achieve such milestone (“Milestone Plan”).

  
 35 

 3.5.1 If Company so notifies the Licensor Institutions, but fails to provide the Licensor
Institutions with both a Milestone Explanation and Milestone Plan, then Company shall have an additional [**] or until the original deadline of the relevant Development Milestone, whichever is later, to meet such milestone. Company’s failure to
do so shall constitute a material breach of this Agreement and the Licensor Institutions shall have the right to terminate this Agreement upon written notice to Company, subject to Section 3.5.6. 

3.5.2 If Company so notifies the Licensor Institutions and provides the Licensor Institutions with a Milestone Explanation and Milestone Plan,
both of which are reasonably acceptable to Broad (and Harvard, if any Harvard Controlled Patent Covers the Licensed Product that is the subject of the Milestone Plan), then Exhibit 3.1 shall be amended automatically to incorporate the extended
and/or amended milestone set forth in the Milestone Plan. 
 3.5.3 If Company so notifies the Licensor Institutions and provides the Licensor
Institutions with a Milestone Explanation and Milestone Plan, but the Milestone Explanation is not reasonably acceptable to Broad (and Harvard, if any Harvard Controlled Patent Covers the Licensed Product that is the subject of the Milestone
Explanation) (e.g., Company asserts lack of finances or development preference for a non-Licensed Product), then the Licensor Institutions shall notify Company that the Milestone Explanation is not acceptable
and explain to Company why the Milestone Explanation is not acceptable and Company shall have an additional [**] or until the original deadline of the relevant Development Milestone, whichever is later, to meet such milestone. Company’s failure
to do so shall constitute a material breach of this Agreement and the Licensor Institutions shall have the right to terminate this Agreement upon written notice to Company, subject to Section 3.5.6. 

3.5.4 If Company so notifies the Licensor Institutions and provides the Licensor Institutions with a Milestone Explanation and Milestone Plan,
but the Milestone Plan is not reasonably acceptable to Broad (and Harvard, if any Harvard Controlled Patent Covers the Licensed Product that is the subject of the Milestone Plan), then the Licensor Institutions shall notify Company that the
Milestone Plan is not reasonably acceptable, explain to Company why the Milestone Plan is not reasonably acceptable and shall provide Company with suggestions for a reasonably acceptable Milestone Plan. Company shall have one opportunity to provide
the Licensor Institutions with a Milestone Plan reasonably acceptable to Broad (and Harvard, if any Harvard Controlled Patent Covers the Licensed Product that is the subject of the Milestone Plan) within [**] of the notice from the Licensor
Institution(s) described in the previous sentence, during which time Broad (and Harvard, if any Harvard Controlled Patent Covers the Licensed Product that is the subject of the Milestone Plan) agree(s) to work with Company in its effort to develop a
reasonably acceptable Milestone Plan. If, within such [**], Company provides the Licensor Institutions with a Milestone Plan reasonably acceptable to Broad (and Harvard, if any Harvard Controlled Patent Covers the Licensed Product that is the
subject of the Milestone Plan), then Exhibit 3.1 shall be amended automatically to incorporate 

  
 36 

 
the extended and/or amended milestone set forth in the Milestone Plan. If, within such [**], Company fails to provide a Milestone Plan reasonably acceptable to Broad (and Harvard, if any Harvard
Controlled Patent Covers the Licensed Product that is the subject of the Milestone Plan), then Company shall have an additional [**] or until the original deadline of the relevant Development Milestone, whichever is later, to meet such milestone.
Company’s failure to do so shall constitute a material breach of this Agreement and the Licensor Institutions shall have the right to terminate this Agreement upon written notice to Company, subject to Section 3.5.6. 

3.5.5 For clarity, if Company fails to achieve a Development Milestone and does not avail itself of the procedure set forth in this
Section 3.5, then the Licensor Institutions shall have the right to terminate this Agreement upon written notice to Company, subject to Section 3.5.6. Disputes arising under Section 3.5 shall not be subject to resolution by the
Executive Officers under Section 11.7. 
 3.5.6 If the Licensor Institutions elect to terminate this Agreement pursuant to this
Section 3.5, then, notwithstanding anything to the contrary in this Section 3.5, Company’s rights under this Agreement shall not terminate under this Section 3.5, and this Agreement shall remain in effect, solely with respect to
a particular Target if, at the time the Licensor Institutions have the right to terminate, Company provides evidence reasonably acceptable to the Licensor Institutions that Company (a) is not in breach of its diligence obligations in accordance
with Exhibit 3.1 with respect to such particular Target, without opportunity to cure such breach in accordance with this Section 3.5, and (b) is (i) researching and developing Cas9 Licensed Products within the Field directed to such
Target, or is causing at least one of its Affiliates or Sublicensees to do so; (ii) if applicable, using commercially reasonable efforts, or is causing at least one of its Affiliates or Sublicensees to use commercially reasonable efforts, to
introduce Cas9 Licensed Products within the Field directed to such Target into the commercial market; and (iii) if applicable, using commercially reasonable efforts, or is causing at least one of its Affiliates or Sublicensees to use
commercially reasonable efforts, to market Cas9 Licensed Products within the Field directed to such Target following such introduction into the market and make such Cas9 Licensed Products reasonably available to the public; and, thereafter, for the
remainder of the Term, Company continues, or causes at least one of its Affiliates or Sublicensees to continue, to develop and commercialize Cas9 Licensed Products directed to the particular Target in accordance with the foregoing clauses (i)-(iii).
For clarity, the Parties agree and acknowledge that this Section 3.5.6 does not create an obligation to achieve Development Milestones under Section 3.1 with respect to Licensed Products in the Field directed to more than [**] Targets,
consistent with the conditions set forth in Exhibit 3.1; provided, however, that if Company fails to meet a Diligence Milestone specified in Exhibit 3.1, the Licensor Institutions may terminate this Agreement in accordance with this
Section 3.5.6. 
 4. CONSIDERATION FOR GRANT OF LICENSE. 

4.1 Division of Consideration. Each element of consideration set forth in this Article 4 shall be provided by Company to each Licensor
Institution in split amounts, with [**] percent ([**]%) of the applicable consideration paid to Harvard and [**] percent ([**]%) of the applicable consideration paid to Broad in accordance with the payment methods set forth in Article 5 hereof. 

  
 37 

 4.2 License Issue Fee. 

4.2.1 Cash Consideration. Company shall pay to the Licensor Institutions a non-refundable
license fee (“License Issue Fee”) of one hundred and twenty-five thousand dollars ($125,000), due and payable within [**] after the Effective Date. 

4.3 License Maintenance Fees. Company shall pay to the Licensor Institutions the annual license maintenance fees (“License
Fees”) in the table below pursuant to this Section 4.3. 
  

					
	 Date
	  	License Fee	 
	 [**] anniversary of the Effective Date
	  	$	[**]	 
	 [**] anniversary of the Effective Date
	  	$	[**]	 
	 [**] anniversary of the Effective Date and each anniversary of the Effective Date
thereafter
	  	$	[**]	 

 Each such License Fee shall be due and payable on January
1st of the Calendar Year to which such fee applies, and [**] percent ([**]%) of the amount of each such License Fee shall be creditable against any Royalties due and payable under Section 4.6
below with respect to Licensed Products or Enabled Products sold in the same Calendar Year in which such License Fee was due. 
 4.4
Issuance of Equity. 
 4.4.1 Initial and Equity Event Issuances. Subject to the execution and delivery by the Parties of
the Stock Issuance Agreement, Company shall, as partial consideration for the licenses granted hereunder, issue to the Licensor Institutions, (i) as of the Effective Date an aggregate of 1,278,161 shares of Common Stock, representing [**]
percent ([**]%) of Company’s outstanding capital stock on a Fully-Diluted Basis as of the date of such issuance and after giving effect to such issuance (the “Initial Shares”) and (ii) contingent upon and effective
as of an Equity Event, such additional number of shares of Common Stock (the “Equity Event Shares”) such that the sum of the Initial Shares, any then-outstanding Anti-Dilution Shares issued pursuant to Section 4.4.2 and the
Equity Event Shares represents [**] percent ([**]%) of Company’s outstanding capital stock on a Fully-Diluted Basis as of the date of such issuance and after giving effect to such issuance (the Initial Shares, the Anti-Dilution Shares and the
Equity Event Shares, collectively, the “Shares”). The Licensor Institutions hereby agree that, as a condition to and effective as of the issuance of the Shares, the Licensor Institutions, will execute that certain Right of First
Refusal and Co-Sale Agreement and Voting Agreement by and among the Company and the stockholders set forth therein, each dated August 7, 2018, as a common stockholder of Company. 

  
 38 

 4.4.2 Anti-Dilution Issuances. Until the cumulative arm’s length investment in
Company reaches $[**] (the “Total Financing Amount”), Company will issue to the Licensor Institutions, on a pro rata basis, from time to time and for no additional consideration, additional shares of Common Stock of Company (the
“Anti-Dilution Shares”) as will cause the Licensor Institutions to own pursuant to this Agreement and the Cpf1 Agreement an aggregate percentage of Company’s outstanding capital stock on a Fully-Diluted Basis that is equal to
the Anti-Dilution Threshold as measured at the time such Total Financing Amount is reached and as calculated after giving effect to the anti-dilutive issuance to the Licensor Institutions. Company shall provide the Licensor Institutions with
evidence of the issuance of such Anti-Dilution Shares promptly after their issuance. 
 4.5 Milestone Payments. 

4.5.1 Development Milestone Payments. Company shall pay to the Licensor Institutions the Milestone Payments set forth in this
Section 4.5.1 with respect to each Single Schedule 1 Product or each Single Schedule 2 Product, as applicable, to achieve each Milestone Event, regardless of whether such Milestone Event is achieved by Company, an Affiliate of Company or a
Sublicensee: 
  

									
	 Milestone Event
	  	Schedule 1 Milestone
Payment (in Dollars)	 	  	Schedule 2 Milestone
Payment (in Dollars)	 
	 [**]
	  	 	[**]	 	  	 	[**]	 
	 [**]
	  	 	[**]	 	  	 	[**]	 
	 [**]
	  	 	[**]	 	  	 	[**]	 
	 [**]
	  	 	[**]	 	  	 	[**]	 
	 [**]
	  	 	[**]	 	  	 	[**]	 
	 [**]
	  	 	[**]	 	  	 	[**]	 

  

	*	 Milestone Events subject to Change of Control Multiplier in accordance with Section 4.5.4.

	†	 For the purposes of this Section 4.5.1, “[**]” means [**]. 

Company shall notify the Licensor Institutions in writing within [**] following the achievement of each Milestone Event described in
Section 4.5.1, and shall make the appropriate Milestone Payment within [**] after the achievement of such Milestone Event. Each Milestone Payment is payable only once for each Single Schedule 1 Product or Single Schedule 2 Product, as
applicable. The Milestone Events set forth in Section 4.5.1 are intended to be successive; for example, if a Single Schedule 1 Product is not required to undergo the event associated with a particular Milestone Event for such Single Schedule 1
Product (a “Skipped Milestone”), then such Skipped Milestone shall be deemed to have been achieved upon the achievement by such Single Schedule 1 Product of the next successive Milestone Event (“Achieved
Milestone”); provided that the Milestone Events based on [**] shall not be deemed to be successive with [**] 

  
 39 

 
(i.e., if the Milestone Event for [**] occurs prior to the Milestone Event for [**], the Milestone Event for [**] shall not be deemed a Skipped Milestone). Payment for any Skipped Milestone that
is owed in accordance with the provisions of this Section 4.5.1 shall be due within [**] after the achievement of the Achieved Milestone. 

4.5.2 Sales Milestone Payments. Company shall pay to the Licensor Institutions, within [**] of the end of the Calendar Year in which the
following sales Milestone Events are first achieved, the following Milestone Payments on a Schedule 1 Product-by-Schedule 1 Product or Schedule 2 Product-by-Schedule 2 Product basis, regardless of whether such Milestone Event is achieved by Company, an Affiliate of Company or a Sublicensee, or a combination thereof:

  

					
	 Milestone Event
	  	Milestone Payment
(in Dollars)	 
	 $[**] dollars in aggregate Net Sales
	  	$	[**]	 
	 $[**] dollars in aggregate Net Sales
	  	$	[**]	 

 4.5.3 Adjustment for Enabled Products. The Milestone Payments set forth in Section 4.5.1 or
Section 4.5.2 above shall be reduced by [**] percent ([**]%) for any Schedule 1 Product or Schedule 2 Product that is an Enabled Product. 

4.5.4 Change of Control Multiplier. In the event that a Change of Control of Company occurs at any time during the Term, the Milestone
Payments for those Milestone Events designated by an asterisk (*) in Section 4.5.1 that have not yet been paid by Company shall be increased by [**] percent ([**]%) (the “Change of Control Multiplier”). 

4.5.5 Milestone Payments for Schedule 1 Products and Schedule 2 Products. In the event that a Licensed Product or Enabled Product is
both a Schedule 1 Product and a Schedule 2 Product, then Company shall pay the applicable Milestone Payment based on whether the achievement of each Milestone Event first occurred with respect to development, regulatory approval or sales of a
Licensed Product or Enabled Product as a Single Schedule 1 Product or Single Schedule 2 Product, with simultaneous achievement being deemed to have first occurred with respect to a Licensed Product or Enabled Product as a Single Schedule 2 Product.
If achievement of a Milestone Event first occurs with respect to development, regulatory approval or sales of a Licensed Product or Enabled Product as a Single Schedule 1 Product, Company shall pay the difference between the applicable Milestone
Payment for a Single Schedule 2 Product and the applicable Milestone Payment for a Single Schedule 1 Product, if such Licensed Product or Enabled Product thereafter achieves such Milestone Event with respect to development, regulatory approval or
sales as a Single Schedule 2 Product. If achievement of a Milestone Event first occurs with respect to development, regulatory approval or sales of a Licensed Product or Enabled Product as a Single Schedule 2 Product, no additional Milestone
Payments shall be due if such Licensed Product or Enabled Product thereafter achieves such Milestone Event with respect to development, regulatory approval or sales as a Single Schedule 1 Product. For clarity, under no circumstances shall Company
pay Milestone Payments for a Licensed Product or Enabled Product that are more than the Milestone Payments set forth for a Single Schedule 2 Product. 

  
 40 

 4.5.6 Replacement Products. If (A) development of a Licensed Product is
terminated after any Milestone Payment set forth in Section 4.5.1 or Section 4.5.2, as applicable, has been made with respect to such Licensed Product and (B) another Licensed Product is selected to replace the terminated Licensed
Product and the selected Licensed Product is for the same, substantially similar or closely related indication and targets the same Target as the terminated Licensed Product (“Replacement Product”), then there shall be no payment
due upon achievement of the same milestone by such Replacement Product for which the Licensor Institutions already received a Milestone Payment for the original Licensed Product. 

4.6 Royalties. 
 4.6.1
Royalty Rates. Company shall pay to the Licensor Institutions running royalties (“Royalties”) on Net Sales of Licensed Products and Enabled Products during the applicable Royalty Term at the applicable royalty rate set forth
below within [**] following the last day of the Calendar Quarter in which such Royalty accrues. The Parties acknowledge that Royalties shall be determined on a Licensed
Product-by-Licensed Product or Enabled Product-by-Enabled Product basis, as applicable,
and on a country-by-country basis. If the manufacture, use, performance or sale of any Licensed Product is Covered by more than one Valid Claim of the Patent Rights,
multiple Royalties shall not be due as a result of being so Covered. 
 4.6.1.1 Royalty Rates for Cas9 Licensed Products
(adjusted for Cas9-II Group B Licensed Products as set forth in Section 4.6.1.3). Company shall pay to the Licensor Institutions a royalty on the aggregate annual Net Sales of
Cas9 Licensed Products, as applicable, as follows: 
  

					
	 Royalty Tiers
	  	Royalty Rate	 
	 The portion of aggregate annual Net Sales up to and including [**] dollars ($[**])
	  	 	[**]	% 
	 The portion of aggregate annual Net Sales greater than [**] dollars ($[**]) and less than [**]
dollars ($[**])
	  	 	[**]	% 
	 The portion of aggregate annual Net Sales greater than [**] dollars ($[**])
	  	 	[**]	% 

 For clarity, upon expiration of the last Valid Claim within the Patent Rights Covering the applicable Licensed
Product above, such Licensed Product shall be deemed an Enabled Product for which the Royalty rates set forth in Section 4.6.1.2 shall apply for the remainder of the Royalty Term. 

  
 41 

 4.6.1.2 Royalty Rates for Cas9 Enabled Products (adjusted for Cas9-II Group B Enabled Products as set forth in Section 4.6.1.3). 
  

					
	 Royalty Tier
	  	Royalty Rate	 
	 The portion of aggregate annual Net Sales up to and including [**] dollars ($[**])
	  	 	[**]	% 
	 The portion of aggregate annual Net Sales greater than [**] dollars ($[**]) and less than [**]
dollars ($[**])
	  	 	[**]	% 
	 The portion of aggregate annual Net Sales greater than [**] dollars ($[**])
	  	 	[**]	% 

 4.6.1.3 Adjustment for Cas9-II Group B Patent Right Products.
The applicable royalty rate set forth in Section 4.6.1.1 shall be reduced by [**] percent ([**]%) for each Cas9-II Group B Licensed Product. The applicable royalty rate set forth in Section 4.6.1.2
shall be reduced by [**] percent ([**]%) for each Cas9-II Group B Enabled Product. If during a Calendar Quarter, a Licensed Product or an Enabled Product is a Cas9-II
Group B Licensed Product or Cas9-II Group B Enabled Product (as applicable) for only a part of the Calendar Quarter, then the royalty rate adjustment set forth in this Section 4.6.1.3 shall be applied on
a pro rata basis based on the part of such Calendar Quarter during which such Licensed Product or Enabled Product (as applicable) is a Cas9-II Group B Licensed Product or
Cas9-II Group B Enabled Product (as applicable). 
 4.6.2 Royalty Offset. 

4.6.2.1 Royalties Under Multiple Agreements. On a
product-by-product basis, with respect to a Licensed Product or an Enabled Product (each as defined in the Cpf1 Agreement) or with respect to a Licensed Product or
Enabled Product (each as defined in this Agreement), if Company is required to pay Royalties (as defined in the Cpf1 Agreement or this Agreement, as applicable) under both (i) this Agreement and (ii) the Cpf1 Agreement, then Company shall
be entitled to credit [**] percent ([**]%) of the Royalties (as defined in the Cpf1 Agreement) payable under the Cpf1 Agreement prior to the application of any royalty offset set forth in the Cpf1 Agreement against the Royalties payable under
Section 4.6.1. As a condition of the offset in this Section 4.6.2.1, in the event that Company takes a credit against Royalties payable under this Agreement pursuant to this Section 4.6.2.1, then in the royalty reports due to the
Licensor Institutions under Section 5.1.1 at the time such credit is taken, Company shall include a calculation of the credit taken and, with the first such royalty report on which such credit is taken, the basis for Company’s
determination of such credit. 
 4.6.2.2 Third Party IP. On a
product-by-product basis, if Company is legally required by a future court order, settlement agreement, contract, or other legally binding written commitment to make
payments to a Third Party of running royalties on net sales of Licensed Products or Enabled Products for a license under or the use of patent rights held by 

  
 42 

 
such Third Party that Cover such Licensed Products or Enabled Products and that are necessary for the commercialization of such Licensed Products or Enabled Products, then Company shall be
entitled to credit up to [**] percent ([**]%) of such running royalties actually paid by Company to such Third Party against the Royalties payable under this Agreement, provided that if such running royalties are also creditable against payments
under the Cpf1 Agreement, then such credit shall be applied to this Agreement and the Cpf1 Agreement on a pro rata basis based on the amount of Royalties (as defined in this Agreement or the Cpf1 Agreement, as applicable) payable under each
applicable agreement. For clarity, the aggregate amount credited under the preceding sentence shall in no event exceed [**] percent ([**]%) of the applicable running royalties actually paid by Company to the applicable Third Party. As a condition of
the offset in this Section 4.6.2.2, Company shall use commercially reasonable efforts to include a provision in any agreement with such Third Party executed after the Effective Date requiring that payment of royalties by Company to such Third
Parties must be offset as a result of Royalties payable under this Agreement by at least the same percentage of net sales as the Licensor Institutions have offset against their Royalties pursuant to this Section 4.6.2. In the event Company
determines that the use of such Third Party patent rights is necessary for the commercialization of Licensed Products or Enabled Products, and takes a credit against Royalties payable under this Agreement, then in the royalty reports due to the
Licensor Institutions under Section 5.1.1 at the time such credit is taken, Company shall include a calculation of the credit taken and, with the first such royalty report on which such credit is taken, the basis for Company’s
determination of commercial necessity. 
 4.6.2.3 Co-Exclusive Adjustment. On a Target-by-Target basis, (a) if Editas (or an Editas sublicensee) publicly discloses that it has initiated a research or development program that uses technology covered
by the Patent Rights and is directed to a Target (a “Competing Program”), then Company, Broad or Harvard may notify the other two parties of such Competing Program or (b) if Company, Broad’s Office of Strategic Alliances
and Partnering or Harvard’s Office of Technology Development (the “Informed Party”) receives credible information that Editas (or an Editas sublicensee) has initiated a Competing Program directed to a Target and
such Competing Program has not been publicly disclosed, then the Informed Party shall notify the other two parties of such Competing Program, in each case subject to the Informed Party’s (and if the Informed Party is Broad’s Office of
Strategic Alliances and Partnering, then Broad’s, and if the Informed Party is Harvard’s Office of Technology Development, then Harvard’s) confidentiality obligations to Third Parties (each such notice under the foregoing clauses
(a) and (b), a “Competing Program Notice”). Upon a party’s receipt of a Competing Program Notice, (i) the Milestone Payments and royalties payable to the Licensor Institutions under Section 4.5 and
Section 4.6 with respect to the Target that is the subject of the Competing Program that is the subject of such Competing Program Notice shall be reduced by [**] percent ([**]%), and (ii) if Company has made Milestone Payments or royalty
payments under Section 4.5 or Section 4.6 of this Agreement with respect to the Target that is the subject of the Competing Program that is the subject of such Competing Program Notice prior to the receipt of the Competing Program Notice,
then Company shall be entitled to offset the foregoing deduction against future Milestone Payments or royalties payable to the Licensor Institutions pursuant to Section 4.5 and Section 4.6, subject to Section 4.6.2.4. Disputes arising
under this Section 4.6.2.3 shall be referred to the Executive Officers for resolution under Section 11.7, and there shall be no reduction in Milestone Payments or royalties under this Section 4.6.2.3 during the pendency of any such
dispute. 

  
 43 

 4.6.2.4 Minimum Royalty. Notwithstanding anything to the contrary herein (a) on
a product-by-product basis, in no event shall payments to the Licensor Institutions under this Agreement be reduced pursuant to this Section 4.6.2 such that the
Licensor Institutions receive less than (i) [**] percent ([**]%) of the applicable rate set forth in Section 4.6.1, if Company is entitled to offset Royalties under this Agreement pursuant to Section 4.6.2.3 and either or both of
Section 4.6.2.1 or Section 4.6.2.2, or (ii) otherwise, [**] percent ([**]%) of the applicable rate set forth in Section 4.6.1, and (b) any amounts that are not offset during a reporting period shall not be creditable against
payments arising in subsequent reporting periods. 
 4.6.3 Patent Challenge. In the event that Company or any of its agents,
Affiliates or Sublicensees is or becomes a Challenging Party, then (a) Company shall provide the Licensor Institutions with at least [**] notice prior to taking any such action, (b) Company shall pay all reasonable costs, fees and expenses
associated with such Patent Challenge that are incurred by the Owner Institutions and their trustees, managers, officers, agents, employees, faculty, affiliated investigators, personnel, and staff, including reasonable attorneys’ fees and all
reasonable costs associated with administrative, judicial or other proceedings, within [**] after receiving an invoice from the Licensor Institutions for same; (c) the co-exclusive licenses granted in
this Agreement may, as of the date of initiation of said challenge or opposition, (i) upon notice by Broad to Company with respect to Broad Controlled Patents or Cas9-II Patent Rights, be converted by
Broad at its option into a non-exclusive license for the remainder of the Term or (ii) upon notice by Harvard to Company with respect to Harvard Controlled Patents, be converted by Harvard at its option
into a non-exclusive license for the remainder of the Term, and in such events described in the foregoing subsections (i) and (ii), the relevant Owner Institutions shall have the right to grant licenses
under their respective Patent Rights to any Person, subject to the then-existing non-exclusive license provided herein; (d) any fees, royalties, milestones or revenues payable to the Licensor Institutions
under Section 4.2 through Section 4.7 shall double in amount if and when any Patent Right survives the Patent Challenge such that it remains valid in whole or in part; and (e) at any time after the Patent Challenge is brought, Broad
may, at its option, terminate this Agreement according to Section 10.2 with respect to Broad Controlled Patents or Cas9-II Patent Rights and Harvard may, at its option, terminate this Agreement according
to Section 10.2 with respect to Harvard Controlled Patents; provided that if any of subsections (a) through (e) are held invalid or unenforceable for any reason, such invalidity or unenforceability shall not affect any of the other said
subsections. Notwithstanding any provision of this Agreement to the contrary, Company shall not have the right to assume or participate in the defense, settlement or other disposition of such Patent Challenge through its status as licensee under
this Agreement, but shall pay associated costs, fees and expenses as provided in this Section 4.6.3. The Parties agree that any challenge or opposition to a Patent Right by Company may be detrimental to the Owner Institutions, and that the
above provisions shall constitute reasonable liquidated damages to reasonably compensate the Owner Institutions for any loss they may incur as a result of Company taking such action. 

  
 44 

 4.7 Sublicense Income. Subject to Section 4.8, Company shall pay to the Licensor
Institutions, within [**] following the last day of the Calendar Quarter in which such Sublicense Income is received by Company, a percentage of Sublicense Income within [**] following the last day of the Calendar Quarter in which such Sublicense
Income is received by Company, in accordance with the rates set forth in this Section 4.7; provided, however, that, for the purpose of calculating payments under this Section 4.7, Company may deduct from the aggregate Sublicense Income
received by Company in a given Calendar Quarter an amount equal to the total payments made by Company to the Licensor Institutions under Article 6 in such Calendar Quarter. For the avoidance of doubt, in the event any Sublicensee transfers rights
granted or transferred by the Licensor Institutions under this Agreement along with rights owned by the Company or granted to the Company by a Third Party, Company shall pay to the Licensor Institutions the following percentages of all Sublicense
Income received by Company or its Affiliates under such Sublicense without deduction from or apportionment of any part of such consideration. Company agrees that all rights relevant to making, using, selling, offering to sell or importing particular
Licensed Products or Enabled Products shall be included in or deemed to be included in the same Sublicense under which the rights granted or otherwise transferred to Company hereunder are granted with respect to such Licensed Products or Enabled
Products for the purpose of calculating Sublicense Income. 
 4.7.1 [**] percent ([**]%) of Sublicense Income received with respect to a
Sublicense executed prior to the date on which the Company has [**]; 
 4.7.2 [**] percent ([**]%) of Sublicense Income received with respect
to a Sublicense executed on or after the date on which the Company has [**]; 
 4.7.3 [**] percent ([**]%) of Sublicense Income received with
respect to a Sublicense executed on or after the date on which the [**]. 
 4.8 Sublicense Income Offset. On a Sublicense-by-Sublicense and Calendar Quarter-by-Calendar Quarter basis, if Company is required
to pay Sublicense Income (as defined in the Cpf1 Agreement or this Agreement, as applicable) under both (a) this Agreement and (b) the Cpf1 Agreement under the same Sublicense in a given Calendar Quarter, then Company shall be entitled to
credit [**] percent ([**]%) of the Sublicense Income (as defined in the Cpf1 Agreement) payable under the Cpf1 Agreement with respect to such Sublicense in such Calendar Quarter prior to the application of any applicable offset set forth in the Cpf1
Agreement against the Sublicense Income payable under Section 4.7 with respect to such Sublicense in such Calendar Quarter; provided that in no event will Sublicense Income payments under this Agreement be reduced pursuant to this
Section 4.8 by more than [**] percent ([**]%) of the payments that would otherwise be payable pursuant to Section 4.7. 
 4.9
Complex Consideration. Company acknowledges and agrees that the Parties have chosen to apply set royalty rates and milestone payments to the rights granted under this Agreement for Company’s convenience in calculating and paying
royalties and milestones. In doing so, Company acknowledges and agrees that certain royalty rates and milestones payments chosen incorporate discounts reflecting that certain products and processes may not be Covered by the Valid Claims of the
Patent Rights but may be based upon, derived from or use the Patent Rights or other licensed intellectual property rights, so that Company, unless explicitly provided otherwise in this Agreement, shall not be entitled to a reduction in the royalty
rate or milestone payment, even if it does not at all times need or use a license to specific Patent Rights, until the end of the Royalty Term for such product or process. 

  
 45 

 4.10 Additional Consideration. 

4.10.1 Success Payments. 

4.10.1.1 Notice. Company shall notify the Licensor Institutions of any payment payable to the Licensor Institutions under this
Section 4.10.1 no later than [**] after the applicable Trigger Date. Such notice shall include the date of such Trigger Date and (a) in the case of a Trigger Date that is not a Company Sale Date or a Trailing Value Receipt Date, a
determination of the Average Market Capitalization as of such Trigger Date or (b) in the case of a Trigger Date that is a Company Sale Date or a Trailing Value Receipt Date, the Upfront Acquisition Value and Trailing Acquisition Value received,
as applicable. 
 4.10.1.2 Achievement of Value Triggers. Following a Trigger Date that is not a Company Sale Date or a Trailing
Value Receipt Date, Company shall pay to the Licensor Institutions the payment indicated in the column labeled “Success Payment” (each such payment, a “Success Payment”) opposite the Trigger Date Value Trigger associated
with such Trigger Date: 
  

					
	 Value Trigger
	  	Success Payment (in Dollars)	 
	 [**]
	  	 	[**]	 
	 [**]
	  	 	[**]	 
	 [**]
	  	 	[**]	 
	 [**]
	  	 	[**]	 
	 [**]
	  	 	[**]	 
	 $10 billion
	  	 	[**]	 

  

	*	 These Success Payments only apply if a Licensed Product Covered by a Valid Claim of the Patent Rights under
this Agreement, or a Licensed Product Covered by a Valid Claim of the Patent Rights under the Cpf1 Agreement (as those terms are defined in the Cpf1 Agreement), in each case, developed by or on behalf of Company or its Affiliate or Sublicensee (as
defined under this Agreement or the Cpf1 Agreement, as applicable) is or has been the subject of a Clinical Study in connection with such development as of the applicable Trigger Date. 

For the avoidance of doubt, more than one Success Payment may become due and payable based on the Average Market Capitalization determined on
any single Trigger Date. By way of example under the immediately preceding sentence, if the Average Market Capitalization on the first Trigger Date is [**] dollars ($[**]), then Company shall pay to the Licensor Institutions aggregate Success
Payments equal to [**] dollars ($[**]). For the avoidance of doubt, the maximum amount payable by Company to the Licensor Institutions pursuant to this Section 4.10.1.2 shall be thirty-one million two
hundred and fifty thousand dollars ($31,250,000). 

  
 46 

 4.10.2 Company Sale Payments. Notwithstanding anything to the contrary herein, if
Company undergoes a Company Sale, then (a) the Licensor Institutions shall receive the applicable Company Sale Success Payment no later than the earlier of (i) [**] after the Company Sale Date and (ii) the first business day following the
date upon which Company, its stockholders or its payment agent, as the case may be, first receives payment of the consideration with respect to such Company Sale, (b) no later than [**] after any Trailing Value Receipt Date on which the
applicable Acquisition Value is greater than or equal to a Value Trigger that corresponds to a Success Payment that previously has not become due and payable, the Licensor Institutions shall receive such unpaid Success Payment and (c) no
Success Payments shall become due hereunder on the basis of Average Market Capitalization equaling or exceeding a Value Trigger. Any payments payable under this Section 4.10.2 must be paid solely in cash or in Public Securities of the
Company’s successor or acquirer, or a combination thereof. With respect to any (i) Company Sale or (ii) Asset Sale to an Affiliate of Company, Company shall cause the acquirer, successor, assignee or licensee of Company or of
Company’s assets, as applicable, to assume Company’s obligations hereunder. 
 4.10.3 Manner and Timing of Payment of Success
Payments. Any Success Payment provided herein that is payable with respect to a Trigger Date and that is not paid in connection with a Company Sale pursuant to Section 4.10.2, may be paid by Company, in its sole discretion, in cash or in a
grant to the Licensor Institutions of a number of shares of Common Stock (any such shares, “Success Payment Shares”), or a combination thereof. Company shall notify the Licensor Institutions of its election with regard to the form
of payment of a Success Payment no later than [**] after the applicable Trigger Date (the “Election Date”). If Company elects to pay any Success Payment (or portion thereof) in cash, Company shall pay to the Licensor Institutions
such Success Payment within [**] following the applicable Election Date. 
 4.10.3.1 Issuance of Success Payment Shares. If
Company elects to pay any Success Payment (or portion thereof) in Success Payment Shares, Company shall issue a number of Success Payment Shares equal to the quotient determined by dividing the applicable Success Payment amount (or portion thereof)
by the FMV of Common Stock on the day immediately prior to the date of issuance of such Success Payment Shares to the Licensor Institutions, in the names of the Licensor Institutions or each of their respective designees, upon instruction by the
Licensor Institutions and in accordance with such instructions, within [**] following such Election Date and in accordance with such instructions. Notwithstanding the foregoing, Company may defer any such issuance of Success Payment Shares until the
date that is [**] after the date of the Initial Public Offering of Company, provided that in the event of any such deferral, (i) the applicable Success Payment amount shall accrue interest from the applicable Election Date to the later of
(A) the date on which such Success Payment and all accrued interest thereon is paid in full, if such Success Payment is paid in cash, or (B) otherwise, the date on which all such Success Payment Shares are issued and covered by an
effective Resale Registration Statement, at the rate of [**] percent ([**]%) per annum (compounded quarterly), 

  
 47 

 
and (ii) Company shall, prior to the date that is [**] after the date of the Initial Public Offering of Company, (x) issue a number of Success Payment Shares equal to the quotient
determined by dividing the applicable Success Payment (or portion thereof) plus the accrued interest by the FMV of Common Stock on the day immediately prior to the date of issuance of such Success Payment Shares to the Licensor Institutions, in the
names of the Licensor Institutions or each of their respective designees, upon instruction by the Licensor Institutions and in accordance with such instructions, or (y) pay to the Licensor Institutions in cash an amount equal to the applicable
Success Payment plus the accrued interest. 
 4.10.3.2 Securities Act Registration. All Success Payment Shares issued under
this Section 4.10.3 shall be registered under the Securities Act and covered by an effective Resale Registration Statement at the time of issuance, if the Common Stock is then publicly traded. All expenses related to the registration,
qualification or compliance with registration of the Success Payment Shares shall be borne by Company. 
 4.10.3.3 Resale Registration
Statement. Any Resale Registration Statement shall include a “final” prospectus, including the information required by Item 507 of Regulation S-K of the Securities Act, as provided by the
Licensor Institutions covered by such Resale Registration Statement. Notwithstanding the foregoing, [**], Company shall [**] to Company [**] to Company [**] to the Company [**]. Notwithstanding anything to the contrary in this Agreement, if the
filing, initial effectiveness or continued use of a Resale Registration Statement at any time would require Company to make an Adverse Disclosure (as defined below), Company may, upon giving prompt written notice of such action to the Licensor
Institutions, delay the filing or initial effectiveness of, or suspend use of, the Resale Registration Statement (a “Suspension”); provided, however, that (a) Company shall not be permitted to exercise a Suspension more than
[**] period for a period not to exceed [**] and (b) the applicable Success Payment shall accrue interest from the applicable Election Date until the later of (i) the date on which such Success Payment and all accrued interest is paid in
full, if such Success Payment is paid in cash, or (ii) otherwise, the date on which all such Success Payment Shares are issued and covered by an effective Resale Registration Statement, at the rate of [**] percent ([**]%) per annum (compounded
quarterly). In the case of a Suspension, the Licensor Institutions agree to suspend use of the applicable prospectus in connection with any sale or purchase of, or offer to sell or purchase, Success Payment Shares, upon receipt of the notice
referred to above. Company shall immediately notify the Licensor Institutions in writing upon the termination of any Suspension, amend or supplement the prospectus, if necessary, so it does not contain any untrue statement or omission and furnish to
the Licensor Institutions such numbers of copies of the prospectus as so amended or supplemented as the Licensor Institutions may reasonably request. If Company does not terminate a Suspension within [**] following the date on which it notifies the
Licensor Institutions thereof, then the Licensor Institutions may request in writing that Company file a Resale Registration Statement with respect to the Success Payment Shares, in which case, subject to the terms of this Section 4.10.3.3,
Company shall, within [**] following such request, (A) file a Resale Registration Statement with respect to the Success Payment Shares (the number of which Success Payment Shares will be calculated to account for any accrued interest with
respect to the Success Payment) or (B) pay to the Licensor Institutions in cash an amount equal to the applicable Success Payment plus the accrued interest thereon. “Adverse Disclosure” means public disclosure of material non-public information that, 

  
 48 

 
in the good faith judgment of the board of directors of Company: (x) would be required to be made in any registration statement filed with the Securities and Exchange Commission by Company
so that such registration statement, from and after its effective date, does not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not
misleading; (y) would not be required to be made at such time but for the filing, effectiveness or continued use of such registration statement; and (iii) Company has a bona fide business purpose for not disclosing publicly. 

4.11 Share Issuance Limitation. In no event shall Company issue to the Licensor Institutions shares of Common Stock (i) if and to
the extent that such issuance would result in a change of control (within the meaning of NASDAQ Listing Rule 5635(b), as amended from time to time), or (ii) if and to the extent such issuance would result in the issuance of more than nineteen
and nine-tenths percent (19.9%) of the Common Stock, for the purposes of the NASDAQ Listing Rule 5635(d)(1), as amended from time to time. 

4.12 Non-Circumvention. Company shall not undertake any reorganization, transfer of assets,
consolidation, merger, dissolution, issue or sale of securities, or any other voluntary action for the purpose of avoiding the observance or performance of its payment obligations under Sections 4.10.1 and 4.4.2 and any related definitions. 

 

	5.	 REPORTS; PAYMENTS; RECORDS. 

5.1 Reports and Payments. 

5.1.1 Reports. Within [**] after the conclusion of each Calendar Quarter commencing with the first Calendar Quarter in which Net Sales
are generated or Sublicense Income is received, Company shall deliver to the Licensor Institutions a report containing the following information (in each instance, with a
product-by-product and country-by-country breakdown and, in the case of the requirement
under Section 5.1.1(c), to the extent such itemized listing of allowable deductions is available from Sublicensees under the terms of the relevant Sublicenses): 
  

	 	(a)	 the number of units of Licensed Products and Enabled Products sold, leased, performed or otherwise transferred,
by Invoicing Entities for the applicable Calendar Quarter; 

  

	 	(b)	 the gross amount billed or invoiced for Licensed Products and Enabled Products sold, leased, performed or
otherwise transferred by Invoicing Entities during the applicable Calendar Quarter; 

  

	 	(c)	 a calculation of Net Sales for the applicable Calendar Quarter, including an itemized listing of allowable
deductions; 

  

	 	(d)	 a reasonably detailed accounting of all Sublicense Income received during the applicable Calendar Quarter;

  
 49 

	 	(e)	 the total amount payable to the Licensor Institutions in dollars on Net Sales and Sublicense Income for the
applicable Calendar Quarter, together with the exchange rates used for conversion; and 

  

	 	(f)	 a list of [**] the Licensed Products. 

Company shall use reasonable efforts to include in each Sublicense a provision requiring the Sublicensee to provide the information required
under this Section 5.1.1. 
 Each such report shall be certified on behalf of Company as true, correct and complete in all material
respects with respect to the information required under Sections 5.1.1(a) through (f), and with respect to the information provided under Section 5.1.1(f), Company shall certify that based solely on its commercially reasonable efforts to
determine such information, Company believes such information is true, correct and complete in all material respects. If no amounts are due to Licensor Institutions for a particular Calendar Quarter, the report shall so state. 

5.2 Payment Currency. All payments due under this Agreement shall be paid in United States dollars. Conversion of foreign currency to
United States dollars shall be made as of the last working day of the applicable Calendar Quarter at the applicable conversion rate existing in the United States (as reported in the Wall Street Journal) or, solely with respect to
Sublicensees, at another commercially reasonable, publicly available, applicable conversion rate as may be provided in a Sublicense. Such payments shall be without deduction of exchange, collection or other charges. 

5.3 Records. Company shall maintain, and shall cause its Affiliates and Sublicensees to maintain, complete and accurate records of
Licensed Products and Enabled Products that are made, used, sold, performed, leased or transferred under this Agreement, any amounts payable to the Licensor Institutions in relation to such Licensed Products or Enabled Products, and all Sublicense
Income received by Company and its Affiliates, which records shall contain sufficient information to permit the Licensor Institutions to confirm the accuracy of any reports or notifications delivered under Section 5.1. Company, its Affiliates
and/or its Sublicensees, as applicable, shall retain such records relating to a given Calendar Year for at least [**] after the conclusion of that Calendar Year (the “Record Retention Period”). 

5.3.1 Audit of Company and Affiliates. During the Record Retention Period, the Licensor Institutions shall have the right, at their
expense, to cause an independent, certified public accountant (or, in the event of a non-financial audit, other appropriate auditor) chosen by the Licensor Institutions and reasonably acceptable to Company to
inspect such records of Company and its Affiliates during normal business hours for the purposes of verifying the accuracy of any reports and payments delivered under this Agreement and Company’s compliance with the terms hereof. Such
accountant or other auditor, as applicable, shall not disclose to the Licensor Institutions any information other than information relating to the accuracy of reports and payments delivered under this Agreement. The Parties shall reconcile any
underpayment or overpayment within [**] after the accountant delivers the results of the audit. If any audit performed under this Section 5.3.1 reveals an underpayment in excess of [**] percent ([**]%) in any Calendar Year, Company shall
reimburse the Licensor Institutions for all amounts incurred in connection with such audit. The Licensor Institutions may exercise their rights under this Section 5.3.1 [**] per audited entity, [**] and only with reasonable prior notice to the
audited entity. 

  
 50 

 5.3.2 Audit of Sublicensees. During the Record Retention Period, the Licensor
Institutions shall have the right, at their expense, to require Company to make available to an independent, certified public accountant (or, in the event of a non-financial audit, other appropriate auditor)
chosen by the Licensor Institutions and reasonably acceptable to Company, during normal business hours, such information as Company has in its possession with respect to reports and payments from Sublicensees for the purposes of verifying the
accuracy of any reports and payments delivered under this Agreement and Company’s compliance with the terms hereof. If such information as Company has in its possession is not sufficient for such purposes, the Licensor Institutions shall have
the right, at their expense, to cause Company to exercise its right under a Sublicense to cause an independent, certified public accountant (or, in the event of a non-financial audit, other appropriate
auditor) chosen by the Licensor Institutions and reasonably acceptable to Company to inspect such records of Sublicensee during normal business hours for the purposes of verifying the accuracy of any reports and payments delivered under this
Agreement and Company’s compliance with the terms hereof. Such accountant or other auditor, as applicable, shall not disclose to the Licensor Institutions any information other than information relating to the accuracy of reports and payments
delivered under this Agreement and then only to the extent such accountant or other auditor may disclose such information to Company under the terms of the relevant Sublicense. If Company does not have the right to conduct an audit of such
Sublicensee for the relevant Calendar Year, Company and the Licensor Institutions shall meet and use reasonable efforts to agree on an appropriate course of action. The Parties shall reconcile any underpayment or overpayment within [**] after the
accountant delivers the results of the audit. If any audit performed under this Section 5.3.2 reveals an underpayment to the Licensor Institutions in excess of [**] percent ([**]%) in any Calendar Year, Company shall reimburse the Licensor
Institutions for all amounts incurred in connection with such audit. The Licensor Institutions may exercise their rights under this Section 5.3.2 [**] per Sublicensee, [**] and only with reasonable prior notice to Company and any audited
Sublicensee. 
 5.4 Late Payments. Any payments by Company that are not paid on or before the date such payments are due under this
Agreement shall bear interest at the lower of (a) [**] percent ([**]%) per month and (b) the maximum rate allowed by law. Interest shall accrue beginning on the first day following the due date for payment and shall be compounded quarterly.
Payment of such interest by Company shall not limit, in any way, the Licensor Institutions’ right to exercise any other remedies the Licensor Institutions may have as a consequence of the lateness of any payment. 

5.5 Payment Method. Each payment due to any Licensor Institution under this Agreement shall be paid by check or wire transfer of funds
to an account(s) in accordance with written instructions provided by such Licensor Institution. If made by wire transfer, such payments shall be marked so as to refer to this Agreement. 

  
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 5.6 Withholding and Similar Taxes. All amounts to be paid to the Licensor
Institutions pursuant to this Agreement shall be without deduction of exchange, collection, or other charges, and, specifically, without deduction of withholding or similar taxes imposed on Company or other government imposed fees or taxes imposed
on Company, except as permitted in the definition of Net Sales. 
  

	6.	 PATENT PROSECUTION. 

6.1 Prosecution of Patent Rights. As between the Parties, Broad and Harvard shall each have and exercise in their sole discretion
exclusive control over the Prosecution of the respective Patent Rights that each controls. The Licensor Institutions shall keep Company reasonably informed regarding the Prosecution of the respective Reviewed Patent Rights that each controls.
Without limiting the foregoing, each of Broad and Harvard shall: (a) provide Company a reasonable opportunity to review and comment on all material submissions and correspondence with respect to the respective Reviewed Patent Rights that each
controls prior to filing of such material submissions and correspondence; provided, however, that copies of patent applications within the respective Reviewed Patent Rights will not be provided prior to filing, and (b) consider in good faith
Company’s comments and recommendations with respect thereto; provided, however, that final decision-making authority with respect to the Prosecution of all Patent Rights shall vest in the Licensor Institutions. 

6.2 Fees and Expenses.  

6.2.1 Reviewed Patent Rights Fee. Subject to Section 6.3.1, Company shall pay to the Licensor Institutions within [**] following
the end of each Calendar Year a fee equal to (a) [**] dollars ($[**]) for the first [**] patent families within the Reviewed Patent Rights (where each patent family is listed under a distinct “Broad Reference” or “Harvard
Reference” number in Exhibit 1.144) and (b) [**] dollars ($[**]) per patent family for each additional patent family in excess of [**] within the Reviewed Patent Rights (where each patent family is listed under a distinct “Broad
Reference” or “Harvard Reference” number in Exhibit 1.144). Company may elect to revise the scope of the Reviewed Patent Rights, either by (i) including one or more additional patent families within the Patent Rights to Exhibit
1.144 or by (ii) substituting one or more patent families in Exhibit 1.144 with one or more other patent families within the Patent Rights, in each of which case ((i) and (ii)) Company will notify the Licensor Institutions in writing of such
election and the Parties will amend this Agreement to update Exhibit 1.144 in accordance with such election within [**] following the Licensor Institutions’ receipt of the applicable notice; provided, however, that Company may not elect to
substitute patent families in Exhibit 1.144 pursuant to the foregoing clause (ii) more than [**]. Notwithstanding the foregoing, Company may elect, at any time upon the issuance of [**] prior written notice to the Licensor Institutions, to
relinquish its rights under Section 6.1 with respect to the Prosecution of certain Reviewed Patent Rights. Upon receipt of such notice by the Licensor Institutions, such Patent Rights shall no longer be deemed Reviewed Patent Rights under this
Agreement; provided, however, that, subject to Section 6.3.1, Company shall continue to reimburse the Licensor Institutions for all expenses incurred after the Effective Date (A) in the Prosecution of any claims or actions specifically
requested by Company or any of its representatives with respect to any of such Patent Rights or (B) with respect to the Prosecution of any such Patent Rights that are no longer licensed under the Editas
Cas9-I License Agreement or the Editas Cas9-II License Agreement (to the extent such expenses have not been reimbursed by a Third Party). 

  
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 6.2.2 Expenses for Company-Requested Actions. Subject to Section 6.3.1, in
addition to the payment obligations set forth in Section 6.2.1, Company shall reimburse each Licensor Institution for all documented, out-of-pocket expenses,
including [**] after the Effective Date [**] (to the extent such expenses have not been reimbursed by a Third Party) within [**] after the date of each invoice from the applicable Licensor Institution for such expenses. 

6.2.3 Expenses for Patent Rights Abandoned by Editas. In the event that any Patent Right is no longer licensed under the Editas Cas9-I License Agreement or the Editas Cas9-II License Agreement, the Licensor Institutions shall notify Company thereof within [**] of the effective date of such change to
the relevant Editas license agreement. Unless Company informs the Licensor Institutions in writing within [**] following its receipt of the applicable notice that it does not wish to pay for the Prosecution of such Patent Right in one or more
jurisdictions (in which case such Patent Right shall be deemed to be an Abandoned Patent Right in such jurisdiction(s)) Company shall, subject to Section 6.3.1, reimburse each Licensor Institution (to the extent not reimbursed by a Third Party)
for all documented, out-of-pocket expenses, including [**] under this Section 6.2.3 within [**] after the date of each invoice from the applicable Licensor
Institution for such expenses, up to the maximum of the greater of, on a patent family-by-patent family (where each patent family is listed under a distinct “Broad
Reference” or “Harvard Reference” number) and annual basis, (a) [**] dollars ($[**]) and (b) an amount equal to the aggregate out-of-pocket expenses
(including [**]. 
 6.3 Abandonment. 

6.3.1 Abandonment by Company. If Company decides that it does not wish to pay for the Prosecution of any Patent Rights in a particular
country under Section 6.2.2 or Section 6.2.3 (such Patent Rights in such country, the “Abandoned Patent Rights”), Company shall provide the Licensor Institutions with prompt written notice of such election. [**] after
receipt of such notice by the Licensor Institutions, Company shall be released from its obligations to reimburse the Licensor Institutions under Section 6.2 for the expenses incurred thereafter as to such Abandoned Patent Rights; provided,
however, that expenses authorized prior to the receipt by the Licensor Institutions of such notice shall be deemed incurred prior to the notice. In the event of Company’s election not to pay for the Prosecution of any Abandoned Patent Rights in
a particular country, any license granted to Company hereunder with respect to such Abandoned Patent Rights shall terminate (solely with respect to such Abandoned Patent Right and such country), and Company shall have no rights hereunder to exploit
such Abandoned Patent Rights in such country. The Licensor Institutions shall be free, without further notice or obligation to Company, to grant rights in and to such Abandoned Patent Rights to Third Parties in the Field without limitation. 

  
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 6.3.2 Abandonment by Licensor Institutions. Except with respect to the Cas9-II Group B Patent Rights, each Licensor Institution agrees to maintain any application or patent within the Patent Rights that it controls for as long as (a) Company continues to meet its obligation to
reimburse expenses associated with such application or patent in accordance with Section 6.2, (b) there is a good faith basis for doing so, and (c) doing so is consistent with the applicable Licensor Institution’s prosecution
strategy. For the avoidance of doubt, this Section 6.3.2 shall not apply and shall not limit the Licensor Institutions’ right to cease Prosecution of a given application within the Patent Rights in lieu of a divisional, continuation or continuation-in-part application that is also within the Patent Rights. 

6.4 Large Entity Designation. The Parties hereby agree that the Licensor Institutions shall pay the fees prescribed for
large entities to the USPTO with respect to the Patent Rights. 
 6.5 Marking. Company shall, and shall cause its Affiliates and
Sublicensees to, mark all Licensed Products sold, performed or otherwise disposed of in such a manner as to conform with the patent laws and practice of the country to which such products are shipped or in which such products are sold for purposes
of ensuring maximum enforceability of the Patent Rights in such country. 
  

	7.	 ENFORCEMENT OF PATENT RIGHTS. 

7.1 Notification. As between the Parties, and subject to any confidentiality obligations of Company owed to any Third Party, Company
shall inform (i) Broad promptly in writing of any alleged infringement of the Broad Controlled Patents and Cas9-II Patent Rights by a Third Party that Company becomes aware of, along with any available
evidence thereof, and (ii) Harvard promptly in writing of any alleged infringement of the Harvard Controlled Patents by a Third Party that Company becomes aware of, along with any available evidence thereof. A Licensor Institution shall inform
Company promptly in writing of any alleged infringement of any Patent Rights within the Field by a Third Party that such Licensor Institution becomes aware of, along with any available evidence thereof. 

7.2 Licensor Institutions’ Enforcement Right.  

7.2.1 As between the Parties, except as otherwise set forth in this Article 7, Broad and Harvard shall each have the sole right, but shall not
be obligated, at their sole discretion, to prosecute at their own expense all infringements of the respective Patent Rights that each controls. So long as Company remains the co-exclusive licensee of any
Patent Rights with respect to a Licensed Product in the Field, as between the Parties, Company shall, subject to the terms of this Article 7, have the first right, but not the obligation, to institute infringement suits under such Patent Rights with
respect to such Licensed Product in the Field where Company reasonably determines that a Third Party is marketing or has specific plans and is preparing to market an infringing product in any country that competes with such Licensed Product in the
Field (“Infringement”); provided, however, that pursuant to the Editas Cas9-I License Agreement or the Editas Cas9-II License Agreement, Editas may have
certain existing, independent first rights to institute infringement suits under certain of the Patent Rights, and thus, notwithstanding anything to the contrary in this Agreement, Company’s rights under this Section 7.2 are subject to an
obligation to coordinate with Editas, as set forth in Section 7.2.2, and are subject and subordinate to the rights of Editas existing as of the Effective Date, as may be amended from time to time, subject to Sections 8.2.1 and 8.2.2.
Notwithstanding anything to the contrary contained herein with respect to any Infringement, if Company owns one or more 

  
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issued patents that cover the allegedly infringing product (“Other IP”), Company shall not initiate action under the Patent Rights unless it (x) also asserts [**] of such
Other IP or (y) obtains written consent from the Licensor Institutions, which consent shall not be unreasonably withheld. Company shall use the same degree of diligence in prosecuting such Infringement as it uses or would use in prosecuting
infringement of its own patent rights. 
 7.2.2 Before Company commences an action with respect to any Infringement: 

7.2.2.1 Company shall deliver a written notice to Editas informing it of such Infringement and Company shall use reasonable efforts to
coordinate its enforcement efforts with respect to such Infringement with Editas for a period not to exceed [**] following the delivery of such notice (or such other period that the Parties may agree upon); 

7.2.2.2 Company shall provide evidence to the Licensor Institutions that (a) it has delivered such written notice to Editas and has used
reasonable efforts to coordinate its enforcement efforts with respect to such Infringement with Editas during such [**] period (or such other period that the Parties may agree upon), and (b) it has good faith basis for initiating action with
respect to such Infringement, and further, Company shall briefly summarize to Licensor Institutions whether and, if so, how Company and Editas will coordinate enforcement efforts, or whether Company will (subject to any obligation to obtain the
consent of the Licensor Institutions, as set forth in Section 7.2.1) independently enforce the Patent Rights with respect to such Infringement, as applicable; and 

7.2.2.3 Company shall consult with the applicable Owner Institutions with respect to its proposed course of action to address the Infringement
and shall consider in good faith the views of the applicable Owner Institutions, and potential effects on the public interest in making its decision whether to take such action, especially with regard to the locally-affordable availability of
Licensed Products or equivalents thereof, e.g., generic products, in Developing Countries. Notwithstanding the foregoing or anything to the contrary contained in this Agreement, Company agrees that the relevant Licensor Institution(s) shall hold
final decision-making authority, to be exercised in good faith, on a case-by-case basis, as to whether Company shall be permitted to enforce the Patent Rights in any
Developing Country. 
 7.2.3 Subject to Editas’ rights described in Section 7.2.1, should Company elect (and, where consent of a
Licensor Institution is required, be permitted) to take action against an actual or potential infringer of Patent Rights, Company shall select counsel reasonably acceptable to the applicable Owner Institutions, shall keep the applicable Owner
Institutions reasonably informed of the progress of the action and shall give the Owner Institutions a reasonable opportunity in advance to consult with Company and offer their views about major decisions affecting the action. Company shall give
careful consideration to those views, but shall have the right to control the action; provided, however, that if Company fails to defend in good faith the validity and/or enforceability of the Patent Rights in the action, or if Company’s
co-exclusive license to a Valid Claim in the suit terminates pursuant to Section 10.2, or if infringement in the Field terminates, the Owner Institutions may elect to take control of the action pursuant to Section 7.3. The expenses of
Company with respect to any suit or suits that Company elects to bring in accordance with this Section 7.2 shall be paid for entirely by Company. If required under Applicable Law to establish standing for the initiation or

  
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maintenance of such infringement action by Company, (a) the relevant Owner Institutions shall, upon request of Company or as required by a court or procedural rules, or may voluntarily, join
or be joined as a party to such action, provided that no Owner Institution shall be the first named party in such action, (b) Company shall hold the Owner Institutions free, clear and harmless from and against any and all costs and expenses,
including attorneys’ fees, incurred in conjunction with the prosecution, adjudication, defense, management or settlement of, or joinder to, such suits and any related appeals, remands or other related proceedings (“Litigation
Expenses”), and (c) Company shall reimburse any and all Litigation Expenses incurred by the Owner Institutions within [**] after receiving an invoice (including a copy of detailed time and expense entries from attorneys) from the
applicable Owner Institutions for the same. Company shall not compromise or settle such litigation without the prior written consent of the applicable Owner Institutions, which shall not be unreasonably withheld. In the event that Company exercises
its right to institute an action against any Infringement pursuant to this Section 7.2, out of any sums recovered in such suit or in settlement thereof, it shall first reimburse the Owner Institutions for any unreimbursed Litigation Expenses
and then reimburse itself for all of its litigation expenses necessarily incurred in the prosecution of any such action. The remainder of any sums recovered shall be divided as follows: (i) Company shall receive an amount equal to its lost
profits or a reasonable royalty on the infringing sales, or whichever measure of damages the court shall have applied; (ii) the Licensor Institutions shall receive an amount equal to the royalties and other amounts that Company would have paid
to the Licensor Institutions if Company had sold the infringing products or services rather than the infringer, provided that (A) amounts payable under clause (ii) shall in no event exceed the amounts payable under clause (i) above
and (B) in the event that the remainder of any sums recovered is insufficient to fully satisfy both of the foregoing clauses (i) and (ii) then Company and the Licensor Institutions shall receive a pro rata share of such remainder in
relative proportion to the amounts that would have been payable to Company and the Licensor Institutions under clauses (i) and (ii); and (iii) the balance, if any, remaining after Company and the Licensor Institutions have been compensated
under the foregoing clauses (i) and (ii) shall be shared by the Parties as follows: [**] percent ([**]%) to Company and [**] percent ([**]%) to the Licensor Institutions. 

7.3 Suit by Owner Institutions. If Company has the right but does not take action in the prosecution, prevention or termination
of any Infringement pursuant to Section 7.2 above, and has the right but has not commenced negotiations with the suspected infringer for the discontinuance of said Infringement, within [**] after receipt of notice from Licensor Institutions of
the existence of such Infringement, the Owner Institution that owns the Patent Right subject to the Infringement may elect to do so. The Owner Institutions shall give due consideration to Company’s reasons for not initiating a lawsuit or
otherwise making or prosecuting a claim. Subject to Section 7.4, any and all expenses, including reasonable attorneys’ fees, incurred by Owner Institutions with respect to the prosecution, adjudication or settlement of a suit in accordance
with this Section 7.3, including any related appeals, shall be paid for entirely by the applicable Owner Institutions. In the event that an Owner Institution exercises its right to initiate or maintain an action against any Infringement
pursuant to this Section 7.3, it shall retain all sums recovered in such suit or in settlement thereof. 

  
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 7.4 Own Counsel. The Party initiating the suit shall have the sole and exclusive
right to elect counsel for any suit initiated by it pursuant to Section 7.2 or Section 7.3; provided that such counsel is reasonably acceptable to the other Party. The other Party shall have the right to participate in and be represented
by counsel of its own selection and at its own expense in any suit instituted under this Article 7 by the first Party for Infringement. 

7.5 Cooperation. Each Party agrees to cooperate fully in any action under this Article 7 that is controlled by the other Party,
including executing legal papers and cooperating in the prosecution as may be reasonably requested by the controlling Party; provided that the controlling Party reimburses the cooperating Party promptly for any costs and expenses incurred by the
cooperating Party in connection with providing such requested cooperation within [**] after receiving an invoice from the cooperating Party for the same. 

7.6 Patent Validity Challenge. Each Party shall promptly notify the other Party in the event it receives notice of any legal or
administrative action by any Third Party against a Patent Right, including any opposition, nullity action, revocation, inter partes review, post-grant review, compulsory license proceeding, or declaratory judgment action. All such proceedings
shall be Prosecution of the Patent Rights and controlled by the Owner Institutions in a manner consistent with Section 6.1; provided however, that if any such proceeding is part of or occurs due to any action or activities of Company or its
Affiliates or Sublicensees, then Company will be responsible for reimbursing the Owner Institutions for one hundred percent (100%) of the out-of-pocket expenses incurred
by the applicable Owner Institution in defending such action (to the extent such expenses have not been reimbursed by a Third Party). 
  

	8.	 WARRANTIES; LIMITATION OF LIABILITY. 

8.1 Compliance with Law. Company represents and warrants that it shall comply, and shall ensure that its Affiliates and Sublicensees
comply, with all Applicable Law, including all local, state, federal and international laws and regulations applicable to the development, manufacture, use, sale, performance and importation of Licensed Products and Enabled Products. Without
limiting the foregoing, Company represents and warrants, on behalf of itself and its Affiliates and Sublicensees, that it shall comply with all applicable United States laws and regulations controlling the export of certain commodities and technical
data, including without limitation all Export Administration Regulations of the United States Department of Commerce. Among other things, these laws and regulations prohibit or require a license for the export of certain types of commodities and
technical data to specified countries. Company hereby gives written assurance that it shall comply with, and shall cause its Affiliates to comply with (and shall contractually obligate its Affiliates and Sublicensees to comply with), all applicable
United States export control laws and regulations, that it bears sole responsibility for any violation of such laws and regulations by itself or its Affiliates or Sublicensees, and that it shall indemnify, defend, and hold Indemnitees and HHMI
Indemnitees harmless (in accordance with Section 9.1) for the consequences of any such violation. 
 8.2 Representations, Warranties
and Covenants. 
 8.2.1 By Broad. Broad represents and warrants that (A) Broad has the authority and right to enter into and
perform its obligations under this Agreement and grant the licenses granted by Broad to Company herein, (B) as of the Effective Date, to the best of the knowledge of Broad’s Office of Strategic Alliances and Partnering, the execution,
delivery and performance 

  
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of this Agreement by Broad does not conflict with, or constitute a breach of, any order, judgment, agreement or instrument to which it is a party or is otherwise bound, and (C) as of the
Effective Date, to the best of the knowledge of Broad’s Office of Strategic Alliances and Partnering, no consent of any Third Party, including without limitation any governmental authority, is required for Broad to execute, deliver and perform
under this Agreement, including without limitation to grant the licenses granted by Broad to Company herein, except for such consents as may have been obtained prior to the Effective Date. Further, Broad will not, during the Term and to the
knowledge of Broad’s Office of Strategic Alliances and Partnering, enter into any agreement (or amend or modify any existing agreement in any manner) that is inconsistent with the co-exclusive rights and
licenses granted to Company in the Field hereunder and subject to the terms and conditions of this Agreement. 
 8.2.2 By Harvard.
Harvard represents and warrants that (A) Harvard has the authority and right to enter into and perform its obligations under this Agreement and grant the licenses granted by Harvard to Company herein, (B) as of the Effective Date, to the
best of the knowledge of Harvard’s Office of Technology Development, the execution, delivery and performance of this Agreement by Harvard does not conflict with, or constitute a breach of, any order, judgment, agreement or instrument to which
it is a party or is otherwise bound, and (C) as of the Effective Date, to the best of the knowledge of Harvard’s Office of Technology Development, no consent of any Third Party, including without limitation any governmental authority, is
required for Harvard to execute, deliver and perform under this Agreement, including without limitation to grant the licenses granted by Harvard to Company herein, except for such consents as may have been obtained prior to the Effective Date.
Further, Harvard will not, during the Term and to the knowledge of Harvard’s Office of Technology Development, enter into any agreement (or amend or modify any existing agreement in any manner) that is inconsistent with the co-exclusive rights and licenses granted to Company in the Field hereunder and subject to the terms and conditions of this Agreement. 

8.2.3 By Company. Company represents and warrants that Company has the authority and right to enter into and perform its obligations
under this Agreement. The Company further represents and warrants that as of the Effective Date (A) to the best of Company’s knowledge, the execution, delivery and performance of this Agreement by Company does not conflict with, or
constitute a breach of, any order, judgment, agreement or instrument to which it is a party or, to its knowledge, is otherwise bound, and (B) to the best of Company’s knowledge, no consent of any Third Party, including without limitation
any governmental authority, is required for Company to execute, deliver and perform under this Agreement, except for such consents as may have been obtained prior to the Effective Date. 

  
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 8.3 Disclaimer. 

8.3.1 NOTHING CONTAINED HEREIN SHALL BE DEEMED TO BE A WARRANTY BY ANY OWNER INSTITUTION THAT IT CAN OR WILL BE ABLE TO OBTAIN PATENTS ON
PATENT APPLICATIONS INCLUDED IN THE PATENT RIGHTS, OR THAT ANY OF THE PATENT RIGHTS WILL AFFORD ADEQUATE OR COMMERCIALLY WORTHWHILE PROTECTION. 

8.3.2 NO OWNER INSTITUTION MAKES ANY WARRANTIES WHATSOEVER AS TO THE COMMERCIAL OR SCIENTIFIC VALUE OF THE PATENT RIGHTS. NO OWNER INSTITUTION
MAKES ANY REPRESENTATION THAT THE PRACTICE OF THE PATENT RIGHTS OR THE DEVELOPMENT, MANUFACTURE, USE, SALE OR IMPORTATION OF ANY LICENSED PRODUCT, OR ANY ELEMENT THEREOF, WILL NOT INFRINGE ANY PATENT OR PROPRIETARY RIGHTS. 

8.3.3 EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN THIS AGREEMENT, NEITHER COMPANY NOR ANY OWNER INSTITUTION MAKES ANY WARRANTY WITH RESPECT TO
ANY TECHNOLOGY, PATENTS, GOODS, SERVICES, RIGHTS OR OTHER SUBJECT MATTER OF THIS AGREEMENT AND COMPANY AND THE OWNER INSTITUTIONS EACH HEREBY DISCLAIMS WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT WITH RESPECT
TO ANY AND ALL OF THE FOREGOING. 
 8.4 Limitation of Liability. 

8.4.1 Except with respect to matters for which Company is obligated to indemnify Indemnitees under Article 9, no Party shall be
liable to any other Party with respect to any subject matter of this Agreement under any contract, negligence, strict liability or other legal or equitable theory for (a) any indirect, incidental, consequential or punitive damages or lost
profits or (b) cost of procurement of substitute goods, technology or services. 
 8.4.2 The Owner Institutions’ aggregate
liability for all damages of any kind arising out of or relating to this Agreement or its subject matter under any contract, negligence, strict liability or other legal or equitable theory shall not exceed the amounts paid to the Licensor
Institutions under this Agreement (including the value of the Shares and, if applicable, Success Payment Shares issued pursuant to this Agreement, in each case calculated at the time of sale, or other disposition in connection with a Company Sale,
of the applicable Share or Success Payment Share by the applicable Owner Institution). 
  

	9.	 INDEMNIFICATION AND INSURANCE. 

9.1 Indemnification. 

9.1.1 Indemnity. Company shall, and shall cause its Affiliates and Sublicensees to, indemnify, defend and hold harmless each Owner
Institution and each of their current and former directors, governing board members, trustees, officers, faculty, affiliated investigators, medical and professional staff, employees, students, and agents and their respective successors,

  
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heirs and assigns (collectively, the “Indemnitees”) from and against any liability, cost, expense, damage, deficiency, loss or obligation of any kind or nature (including
reasonable attorneys’ fees and other costs and expenses of litigation or defense) to which any Indemnitee may become subject as a result of any Third Party claim, suit, investigation, action, demand or judgment based upon, arising out of, or
otherwise relating to this Agreement or any Sublicense or subcontract, including (a) any such cause of action relating to product liability concerning any product, process, or service made, used, sold or performed pursuant to any right or
license granted under this Agreement and (b) any such cause of action relating to any Environmental Impact involving or arising from a Licensed Product or Enabled Product (collectively, “Claims”), except to the extent any such
Claim results from or arises out of the gross negligence or willful misconduct of an Indemnitee or material breach of this Agreement by the Licensor Institutions. Company and each of its Affiliates and Sublicensees are referred to as
“Indemnitor” below. 
 9.1.2 Procedures. The Indemnitees agree to provide Company with prompt written notice of any
Claim for which indemnification is sought under this Agreement. Indemnitor agrees, at its own expense, to provide attorneys reasonably acceptable to the Licensor Institutions and the applicable indemnified Owner Institution to defend against any
such Claim. The Indemnitees shall cooperate with Indemnitor, at Indemnitor’s expense, in such defense and shall permit Indemnitor to conduct and control such defense and the disposition of such Claim (including without limitation all decisions
relative to litigation, appeal, and settlement); provided, however, that any Indemnitee shall have the right to retain its own counsel, at the expense of Indemnitor, if representation of such Indemnitee by the counsel retained by Indemnitor would be
inappropriate because of actual or potential differences in the interests of such Indemnitee and any other party represented by such counsel. The Licensor Institutions and the applicable indemnified Owner Institution agree to use diligent efforts to
select counsel, and to cause any other Indemnitees affiliated with their respective institutions to select counsel, that minimizes the number of counsel retained by all Indemnitees if representation of an Indemnitee by the counsel retained by
Indemnitor would be inappropriate because of actual or potential differences in the interests of such Indemnitee and any other party represented by such counsel. Indemnitor agrees to keep counsel(s) for Indemnitees informed of the progress in the
defense and disposition of such claim and to consult with the Licensor Institutions and the applicable indemnified Owner Institution with regard to any proposed settlement. Company shall not settle any Claim that has an adverse effect on the rights
of any Indemnitee hereunder that is not immaterial or that admits any liability by or imposes any obligation on any Indemnitee without the prior written consent of such Indemnitee, which consent shall not be unreasonably withheld, conditioned or
delayed. An Indemnitee may not settle any Claim without the prior written consent of Company, which consent shall not be unreasonably withheld, conditioned or delayed. 

9.1.3 HHMI Indemnity. HHMI, and its trustees, officers, employees, and agents (collectively, “HHMI Indemnitees”), shall
be indemnified, defended by counsel acceptable to HHMI, and held harmless by Company, from and against any liability, cost, expense, damage, deficiency, loss or obligation, of any kind or nature (including without limitation, reasonable
attorneys’ fees and other costs and expenses of defense) based upon, arising out of, or otherwise relating to any Third Party claim (collectively, “HHMI Claims”), based upon, arising out of, or otherwise relating to this
Agreement or any Sublicense, including without limitation any cause of 

  
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action relating to product liability. The previous sentence shall not apply to any HHMI Claim that is determined with finality by a court of competent jurisdiction to result solely from the gross
negligence or willful misconduct of an HHMI Indemnitee. Notwithstanding Section 8.4 or any other provision of this Agreement, Company’s obligation to defend, indemnify and hold harmless the HHMI Indemnitees under this paragraph shall not
be subject to any limitation or exclusion of liability or damages or otherwise limited in any way. 
 9.2 Insurance. 

9.2.1 Beginning at the time any Licensed Product or Enabled Product is being commercially distributed or sold (other than for the purpose of
obtaining Regulatory Approval) by Company, or by an Affiliate, Sublicensee or agent of Company, Company shall, at its sole cost and expense, procure and maintain commercial general liability insurance in amounts not less than [**] dollars ($[**])
per incident and [**] dollars ($[**]) annual aggregate and naming the Indemnitees and HHMI Indemnitees as additional insureds. During clinical trials of any such Licensed Product or Enabled Product, Company shall, at its sole cost and expense,
procure and maintain commercial general liability insurance in such equal or lesser amount as the Licensor Institutions or any other Owner Institution shall require, naming the Indemnitees and HHMI Indemnitees as additional insureds. Such commercial
general liability insurance shall provide (a) product liability coverage and (b) broad form contractual liability coverage for Company’s indemnification obligations under this Agreement. 

9.2.2 If Company elects to self-insure all or part of the limits described above in Section 9.2.1 (including deductibles or retentions
that are in excess of [**] dollars ($[**]) annual aggregate) such self-insurance program must be acceptable to the Owner Institutions and their respective insurers in their sole discretion. The minimum amounts of insurance coverage required shall
not be construed to create a limit of Company’s liability with respect to its indemnification obligations under this Agreement. 
 9.2.3
Company shall provide each Owner Institution with written evidence of such insurance upon request of such Owner Institution. Company shall provide each Owner Institution with written notice at least [**] prior to the cancellation, non-renewal or material change in such insurance. If Company does not obtain replacement insurance providing comparable coverage within such [**] period, the Licensor Institutions shall have the right to terminate
this Agreement effective at the end of such [**] period without notice or any additional waiting periods. 
 9.2.4 Company shall maintain
such commercial general liability insurance beyond the expiration or termination of this Agreement during: (a) the period that any Licensed Product or Enabled Product is being commercially distributed, sold or performed by Company, or an
Affiliate, Sublicensee or agent of Company; and (b) a reasonable period after the period referred to in (a) above, which in no event shall be less than [**]. 

  
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	10.	 TERM AND TERMINATION. 

10.1 Term. The term of this Agreement shall commence on the Effective Date and, unless earlier terminated as provided in this Article
10, shall continue in full force and effect until the expiration of the last to expire Valid Claim (the “Term”). Upon such expiration, the Company shall have a worldwide, perpetual, irrevocable, fully paid up, sublicensable license
under the rights and licenses granted to Company under Section 2.1, subject to Section 10.4. 
 10.2 Termination. 

10.2.1 Joint Action of Licensor Institutions. The Licensor Institutions’ rights to terminate this Agreement set forth in this
Section 10.2 shall be joint, not several. Neither Licensor Institution acting alone shall have the right to terminate this Agreement; provided, however, that each Licensor Institution shall severally be entitled to terminate the licenses
granted to Company herein under such Licensor Institution’s respective rights in the Patent Rights to the same extent Licensor Institutions are entitled to terminate this Agreement pursuant to Sections 10.2.3.2, 10.2.4 and 10.2.5 hereof. 

10.2.2 Termination Without Cause. Company may terminate this Agreement without cause upon four (4) months’ prior written
notice to the Licensor Institutions. 
 10.2.3 Termination for Default. 

10.2.3.1 In the event that either Party commits a material breach of its material obligations under this Agreement and fails to cure such
breach within [**] (or [**] in the case of failure to make any payment) after receiving written notice thereof from the other Party, the other Party may terminate this Agreement immediately upon written notice to the Party in breach. 

10.2.3.2 If Company defaults in its material obligations under Section 9.2 to procure and maintain insurance, or if Company has in any
event failed to comply with the notice requirements contained therein, and fails to cure such default (i) within [**] after receiving written notice thereof from Broad, then Broad may terminate this Agreement immediately, with respect to Broad
Controlled Patents and Cas9-II Patent Rights, upon written notice to Company and (ii) within [**] after receiving written notice thereof from Harvard, then Harvard may terminate this Agreement
immediately, with respect to Harvard Controlled Patents, upon written notice to Company. If such default of Company’s material obligations under Section 9.2 arises as a result of a breach by a Sublicensee of the terms of a Sublicense,
Company may cure such breach by purchasing additional insurance that covers the gaps in coverage created by virtue of such Sublicensee’s breach. For clarity, under this Section 10.2.3.2, each Licensor Institution shall severally be
entitled to terminate the licenses granted to Company herein under such Licensor Institution’s respective rights in the Patent Rights, pursuant to Section 10.2.1. 

10.2.3.3 The Licensor Institutions shall be entitled to terminate this Agreement in accordance with the provisions of Sections 3.2 and 3.5.

 10.2.3.4 Notwithstanding the foregoing provisions of this Section 10.2.3, if Company disputes a material breach or other default
alleged by the Licensor Institutions pursuant to Section 10.2.3.1 or 10.2.3.2 by written notice to the Licensor Institutions within the relevant cure period, then the Licensor Institutions shall not have the right to terminate this Agreement
unless it has been determined, in accordance with Section 11.7, that this Agreement was materially breached and Company fails to cure such material breach or default within the relevant cure period after such determination. 

  
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 10.2.4 Termination for Patent Challenge. If Company or any of its Affiliates or
Sublicensees directly or indirectly brings, assumes or participates in, or knowingly, willfully or recklessly assists in bringing a Patent Challenge (except as required under a court order or subpoena), then the following shall apply: (a) if
Company or any of its Affiliates is the party so bringing, assuming, participating in or assisting in such Patent Challenge, then (i) Broad shall be entitled to immediately terminate this Agreement with respect to Broad Controlled Patents and Cas9-II Patent Rights upon written notice to Company and (ii) Harvard shall be entitled to immediately terminate this Agreement with respect to Harvard Controlled Patents upon written notice to Company, and
(b) if a Sublicensee is the party so bringing, assuming, participating in or assisting in such Patent Challenge, then (i) (x) Broad shall be entitled to immediately terminate the rights hereunder with respect to Broad Controlled Patents
and Cas9-II Patent Rights as and to the extent sublicensed to a Sublicensee upon written notice to Company and (y) Harvard shall be entitled to immediately terminate the rights hereunder with respect to
Harvard Controlled Patents as and to the extent sublicensed to a Sublicensee upon written notice to Company and (ii) (x) Broad shall grant Company a period not to exceed [**] from the date of notice by Broad to Company of its intention to
terminate the Agreement with respect to Broad Controlled Patents and Cas9-II Patent Rights due to such Sublicensee bringing, assuming, participating in or assisting in a Patent Challenge, during which period
Company may terminate any and all agreements with such Sublicensee that contain a Sublicense with respect to Broad Controlled Patents and Cas9-II Patent Rights and (y) Harvard shall grant Company a period
not to exceed [**] from the date of notice by Harvard to Company of its intention to terminate the Agreement with respect to Harvard Controlled Patents due to such Sublicensee bringing, assuming, participating in or assisting in a Patent Challenge,
during which period Company may terminate any and all agreements with such Sublicensee that contain a Sublicense with respect to Harvard Controlled Patents. If, pursuant to the foregoing clause (ii), Company terminates such agreement(s) during such
[**] period, then (A) Broad shall not be entitled to terminate this Agreement with respect to Broad Controlled Patents and Cas9-II Patent Rights by virtue of such Sublicensee bringing, assuming,
participating in or assisting in such Patent Challenge and (B) Harvard shall not be entitled to terminate this Agreement with respect to Harvard Controlled Patents by virtue of such Sublicensee bringing, assuming, participating in or assisting
in such Patent Challenge. However, if Company does not terminate such agreement(s) during such [**] period, then (I) Broad shall be entitled to immediately terminate this Agreement with respect to Broad Controlled Patents and Cas9-II Patent Rights upon written notice to Company thereof and (II) Harvard shall be entitled to immediately terminate this Agreement with respect to Harvard Controlled Patents upon written notice to Company
thereof. For clarity, under this Section 10.2.4, each Licensor Institution shall severally be entitled to terminate the licenses granted to Company herein under such Licensor Institution’s respective rights in the Patent Rights, pursuant
to Section 10.2.1. 

  
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 10.2.5 Bankruptcy. Broad may terminate this Agreement with respect to Broad
Controlled Patents and Cas9-II Patent Rights, and Harvard may terminate this Agreement with respect to Harvard Controlled Patents, upon notice to Company if Company becomes subject to a Bankruptcy Event or in
the event of dissolution or cessation of operations of the Company. For clarity, under this Section 10.2.5, each Licensor Institution shall severally be entitled to terminate the licenses granted to Company herein under such Licensor
Institution’s respective rights in the Patent Rights, pursuant to Section 10.2.1. 
 10.2.6 Termination without Prejudice.
The Licensor Institutions’ right of termination in this Section 10.2 shall be in addition and without prejudice to, and shall not constitute a waiver of, any right of the Licensor Institutions for recovery of any monies then due to it
hereunder or any other right or remedy the Licensor Institutions may have at law, in equity or under this Agreement. 
 10.3 Effect of
Termination. 
 10.3.1 Termination of Rights. Upon expiration or termination of this Agreement by either Party pursuant to any of
the provisions of Section 10.2: 
 10.3.1.1 the rights and licenses granted to Company under Article 2 shall terminate, all rights in
and to and under the Patent Rights shall revert to the Licensor Institutions and neither Company nor its Affiliates may make any further use or exploitation of the Patent Rights; and 

10.3.1.2 all existing Sublicenses shall automatically terminate [**] following the effective date of termination of this Agreement; provided
that, if any Sublicensee is (i) an Affiliate of Company or (ii) in material default of any material provision of the applicable Sublicense such that Company would have the right to terminate the Sublicense ((i) and (ii) together,
“Ineligible Sublicensees”) then the applicable Sublicense to which such Sublicensee is a party shall terminate effective immediately upon termination of this Agreement. Upon termination of this Agreement pursuant to any of the
provisions of Section 10.2, (A) Company shall promptly provide notice of such termination to any Sublicensee, (B) each Sublicensee that is not an Ineligible Sublicensee shall have the right to enter into a separate license agreement
directly with the Licensor Institutions (a “Direct License”) on substantially the same non-economic terms and conditions set forth in the Sublicense and on economic terms providing for the
payment by such Sublicensee to the Licensor Institutions of the consideration that otherwise would have been payable to the Licensor Institutions if the applicable Sublicense and this Agreement were still simultaneously in effect, adjusted as if a
Change of Control of Company had occurred (i.e., the Change of Control Multiplier shall automatically apply in accordance with Section 4.5.4 as of the effective date of termination of this Agreement, resulting in any Milestone Payments that
have not accrued at such time being increased by [**]%), and (C) the Licensor Institutions shall automatically grant each such Sublicensee a temporary continuation (to expire upon the earlier of (x) execution of the Direct License or
(y) the date that is [**] following termination of this Agreement) of the rights and obligations such Sublicensee had as a Sublicensee under this Agreement (a “Temporary Extension”); provided that, under both the Direct License
and the Temporary Extension, (a) the Licensor Institutions shall not have (i) any obligations that are greater than or inconsistent with the obligations of the Licensor Institutions under this Agreement or the nature of the Licensor
Institutions as an academic and non-profit entity or (ii) any fewer rights than it has under this Agreement; (b) there shall be no representations, warranties, expenses or liabilities of or on any
Owner Institution that are not 

  
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included in this Agreement; (c) all obligations arising prior to execution of the Direct License and grant of the Temporary Extension shall remain the responsibility of Company and the
Licensor Institutions shall be released from any and all liability relating to such obligations; (d) the terms of such Direct License and Temporary Extension shall provide for payment to the Licensor Institutions of the same consideration that
would have been payable to the Licensor Institutions if the applicable Sublicense and this Agreement were still simultaneously in effect, adjusted as if a Change of Control of Company had occurred (i.e., the Change of Control Multiplier shall
automatically apply in accordance with Section 4.5.4 as of the effective date of termination of this Agreement); and (e) such modifications shall be included as are reasonably necessary to accommodate the functional and structural
differences between Company and the Licensor Institutions. By way of example and not limiting the foregoing clause (d), if the Sublicense required payment to Company of a license fee and the Licensor Institutions would have been entitled to receive
a percentage of such payment under Section 4.7 of the Agreement, then the Licensor Institutions shall continue to be entitled, under the Temporary Extension or Direct License, to the same share of that same license fee payment under the
Sublicense that the Licensor Institutions would have received had this Agreement and the Sublicense been simultaneously in effect. If any Sublicensee desires to enter into a Direct License, it shall wholly be the responsibility of that Sublicensee
to notify the Licensor Institutions of such desire no later than [**] after the effective date of termination of this Agreement. If the Licensor Institutions and the applicable Sublicensee, for any reason, do not enter into a Direct License within
[**] after the effective date of termination of the Agreement, the applicable Sublicense and Temporary Extension, and all rights granted thereunder, shall automatically terminate. 

10.3.2 Accruing Obligations. Termination or expiration of this Agreement shall not relieve the Parties of obligations accruing prior to
such termination or expiration, including obligations to pay amounts accruing hereunder up to the date of termination or expiration. After the date of termination or expiration (except in the case of termination by the Licensor Institutions pursuant
to Section 10.2), Company, its Affiliates and Sublicensees may sell Licensed Products then in stock; provided that Company shall pay the applicable Royalties and other payments to the Licensor Institutions in accordance with Article 4, provide
reports and audit rights to the Licensor Institutions pursuant to Article 5 and maintain insurance in accordance with the requirements of Section 9.2. The Parties agree that the obligations in Section 4.10.1 shall accrue immediately upon
execution of this Agreement by both Parties, regardless of the events, invoice and payment timing details set forth therein. 
 10.3.3
Enabled Products. After the date of termination or expiration of this Agreement, Company and its Affiliates may continue to sell and provide Enabled Products, provided that (a) for the remaining duration of any Royalty Term applicable to
any such Enabled Product, Company shall pay the applicable Royalties and other payments to the Licensor Institutions in accordance with Article 4, provide reports and audit rights to the Licensor Institutions pursuant to Article 5, and
(b) Company shall maintain insurance in accordance with the requirements of Section 9.2. 

  
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 10.3.4 Disposition of Company Developments. In the event this Agreement is terminated
prior to expiration of the Term, Company shall consider in good faith with the Licensor Institutions during the [**] period after such termination, whether and on what terms Company will: 

10.3.4.1 provide to the Owner Institutions a copy of, and, if requested by the Owner Institutions, grant the Owner Institutions a
sublicensable license to, all patents and patent applications of the Company or its Affiliates that improve or are otherwise related to the Patent Rights or that cover a Licensed Product that any of the Owner Institutions are interested in pursuing
either themselves or through a licensee; provided that the terms of any such license shall be consistent with Company’s obligations under contract and Applicable Law and its officers’ and directors’ fiduciary obligations. In the case
where Harvard is granted a license to any such patents and patent applications of Company or its Affiliates pursuant to this Section 10.3.4.1, such license shall extend to any HHMI employees conducting research at Harvard and/or Broad. 

10.3.4.2 provide the Owner Institutions with access to and, at the Owner Institutions’ request and expense, deliver to the Owner
Institutions a copy of all documents, filings, data and other information in Company’s or its Affiliates’ possession and control as of the date of such termination (other than documents, filings, data and other information owned by
Sublicensees or Third Parties) to the extent pertaining solely to any of the Patent Rights or Licensed Products, including all records required by Regulatory Authorities to be maintained with respect to Licensed Products, all regulatory filings,
approvals, reports, records, correspondence and other regulatory materials (including any related to reimbursement or pricing approvals), and all documents, data and other information related to clinical trials and other studies of Licensed Products
(collectively, “Documentation and Approvals”), if and to the extent that the provision of, access to and delivery of such Documentation and Approvals shall be consistent with Company’s obligations under contract and Applicable
Law; and 
 10.3.4.3 permit the Owner Institutions and their licensees to utilize, reference, cross reference, have access to, and
incorporate in applications and filings (including with any Regulatory Authority in furtherance of applications for regulatory approval) the Documentation and Approvals if and to the extent that the foregoing right to utilize, reference, cross
reference, have access to, incorporate such Documentation and Approvals shall be consistent with Company’s obligations under contract and Applicable Law; provided, however, that notwithstanding anything in the foregoing to the contrary, the
right to utilize, reference, cross reference, have access to, incorporate such Documentation and Approvals shall not be deemed or construed as a grant of any license or other right under any patent or patent application owned or controlled by
Company, its Affiliates or any Third Party. 
 10.3.4.4 It is understood that all of the foregoing provisions of Sections 10.3.4.1-10.3.4.3 shall be subject to agreement by Company and the applicable Owner Institution on the terms and conditions thereof, as first described above in this Section 10.3.4. It is further understood
that, following a Company Sale, any patent, patent application, other intellectual property right or Documentation and Approvals owned or controlled prior to such Company Sale by the acquirer or any of its Affiliates shall not be subject to the
terms of this Section 10.3.4. 

  
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 10.4 Survival. The Parties’ respective rights, obligations and duties under
Articles 5, 9, 10 and 11, Sections 8.3 and 8.4, as well as any rights, obligations and duties which by their nature extend beyond the expiration or termination of this Agreement, shall survive any expiration or termination of this Agreement. In
addition, (i) Section 11.18 and (ii) Company’s obligations under (a) Section 4.4.2, (b) Section 4.7, with respect to Sublicenses granted prior to expiration or termination of the Agreement, and
(c) Sections 4.5, 4.6 and 4.10, shall in each case survive such expiration or termination. 
  

	11.	 MISCELLANEOUS. 

11.1 Confidentiality. 

11.1.1 “Licensor Institution Confidential Information” means (a) any information related to Prosecution of Cas9-I Patent Rights provided to Company by or on behalf of Harvard (“Harvard Confidential Information”); (b) any information related to Prosecution of Patent Rights provided to Company by or on
behalf of Broad (“Broad Confidential Information”); (c) any information or material in tangible form that is marked as “confidential” or proprietary by a Licensor Institution at the time it is sent to Company; and
(c) information that is furnished orally by a Licensor Institution if such Licensor Institution identifies such information as “confidential” or proprietary in writing by a memorandum delivered to Company within [**] after the date of
disclosure. “Company Confidential Information” means (i) the Development Plan; (ii) any reports or notices prepared by Company and provided to the Licensor Institutions pursuant to Sections 3.4, 4.5.1, 4.5.2, 4.10 and
5.1.1; and (iii) any copies of Sublicenses, or information extracted therefrom, provided by Company to the Licensor Institutions under Section 2.5.2. The terms of this Agreement constitute the Confidential Information of both Parties. The
Parties agree the terms of this Agreement may be shared with the Owner Institutions and HHMI. “Confidential Information” means the Licensor Institution Confidential Information and the Company Confidential Information, as
applicable. 
 11.1.2 For the Term of this Agreement and a period of [**] thereafter, (a) Company shall maintain in confidence and shall
not disclose (i) to any third party any Licensor Institution Confidential Information, (ii) to Broad any Harvard Confidential Information, without the prior written consent of Harvard, and (iii) to Harvard any Broad Confidential
Information without the prior written consent of Broad and (b) the Licensor Institutions shall maintain in confidence and shall not disclose to any third party any Company Confidential Information, provided that the Licensor Institutions may
disclose to the Owner Institutions and HHMI (A) this Agreement including any Exhibits and Sublicenses, or information extracted therefrom, and (B) such Confidential Information of Company as an Owner Institution or HHMI, as the case may
be, reasonably requests, provided that any disclosure under the foregoing clauses (A) and (B) shall be made in confidence to the Owner Institutions or HHMI, as the case may be. Each Party shall take all reasonable steps to protect the
Confidential Information of the other Party with the same degree of care used to protect its own confidential or proprietary information. Neither Party shall use the Confidential Information of the other Party for any purpose other than those
contemplated by this Agreement. The foregoing obligations under this Section 11.1.2 shall not apply to: 
  

	 	(i)	 information that is known to the receiving Party or independently developed by the receiving Party prior to the
time of disclosure without use of or reference to the other Party’s Confidential Information, in each case, to the extent evidenced by contemporaneous written records; 

  
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	 	(ii)	 information that is independently developed by the receiving Party at or after the time of disclosure without
use of or reference to the other Party’s Confidential Information, to the extent evidenced by contemporaneous written records; 

  

	 	(iii)	 information disclosed to the receiving Party by a Third Party that has a right to make such disclosure; or

  

	 	(iv)	 information that is publicly disclosed at or prior to the time of disclosure hereunder or becomes patented,
published or otherwise part of the public domain as a result of acts by the furnishing Party or a Third Party obtaining such information as a matter of right. 

11.1.3 Permitted Disclosures. Notwithstanding anything in this Section 11.1 to the contrary, either Party may disclose Confidential
Information of the other Party to the extent such disclosure is reasonably necessary in the following instances: 
 11.1.3.1 prosecuting or
defending litigation in accordance with Article 7 of this Agreement; 
 11.1.3.2 making filings with the Securities and Exchange Commission
or foreign equivalent, any stock exchange or market, or any Regulatory Authorities, which shall include publicly disclosing or filing this Agreement as a “material agreement” in accordance with Applicable Law or applicable stock exchange
regulations; 
 11.1.3.3 complying with Applicable Law or submitting information to governmental authorities, including without limitation
any Regulatory Authority, and including without limitation any order of a court or agency of competent jurisdiction, including without limitation any Regulatory Authority; provided that if either Party is required by Applicable Law to make any
public disclosure of Confidential Information of the other Party, to the extent the Party so required may legally do so, it will give reasonable advance notice to the other Party of such disclosure and will use its reasonable efforts to secure
confidential treatment of such Confidential Information prior to its disclosure (whether through protective orders or otherwise); and 

11.1.3.4 to its Affiliates and its and their prospective and actual acquirers, licensees, sublicensees, distributors, investors, lenders and
underwriters, and (a) its and their employees, consultants, agents, and advisors, on a need to know basis, each of whom prior to disclosure must be bound by written obligations of confidentiality and
non-use of substantially equivalent or greater scope and duration than those set forth in this Article 11, (b) its and their accountants and lawyers, on a need to know basis, each of whom prior to disclosure
must be bound by written or legally enforceable professional ethical obligations of confidentiality and 

  
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non-use of substantially equivalent or greater scope and duration than those set forth in this Article 11, (c)
co-owners of any of the Patent Rights, each of whom prior to disclosure must be bound by written obligations of confidentiality and non-use, and (d) HHMI (provided
that HHMI receives such information in confidence); provided that the scope of Confidential Information that may be disclosed by Company to any Person under this Section 11.1.3.4 is limited to the terms of this Agreement and any notices given
hereunder and not any other Licensor Institution Confidential Information unless otherwise agreed to in writing by the Licensor Institutions. In addition, notwithstanding anything in this Section 11.1 to the contrary, Broad and Harvard may
disclose to (i) any other co-owner of any of the Patent Rights and (ii) HHMI or any other financial sponsor of the Licensor Institutions with respect to the Patent Rights the existence and terms of
this Agreement (including all Exhibits and Schedules), provided that any such disclosure shall be made in confidence. 
 11.1.4 Additional
Permitted Disclosure. In addition to the rights set forth elsewhere in this Article 11, each Licensor Institution and Company shall have the right to disclose to Third Parties without an obligation of confidentiality all or part of a redacted
copy of this Agreement, or the substance thereof, in the form filed by Company to comply with its obligations under the Securities Act or the Exchange Act or the rules or regulations of a Trading Market. The Party intending to make such disclosure
shall use good faith efforts to notify the other Party in advance of any such disclosure. In the event that such advance notice is not provided by a Party that makes such disclosure, such Party shall notify the other Party of such disclosure
promptly after such disclosure is made. 
 11.2 Use of Name. Except as provided below, Company shall not, and shall ensure that its
Affiliates and Sublicensees shall not, use or register the name “The Broad Institute, Inc.,” “Wyss Institute for Biologically Inspired Engineering at Harvard University,” “President and Fellows of Harvard College,”
“Massachusetts Institute of Technology,” “Lincoln Laboratory,” the “University of Iowa Research Foundation,” the “University of Iowa” or “The Rockefeller University” or any variation, adaptation, or
abbreviation thereof (alone or as part of another name) or any logos, seals, insignia or other words, names, symbols or devices that identify the Owner Institutions or any Owner Institution’s school, unit, division or affiliate
(“Institution Names”) for any purpose except with the prior written approval of, and in accordance with restrictions required by, the applicable Owner Institution, as applicable. Without limiting the foregoing, Company shall, and
shall ensure that its Affiliates and Sublicensees shall, cease all use of Institution Names as permitted under or in connection with this Agreement on the termination or expiration of this Agreement except as otherwise approved in writing by the
applicable Owner Institution. This restriction shall not apply to any information required by law to be disclosed to any governmental entity. Company shall not use or register the name “Howard Hughes Medical Institute” or any variation,
adaptation, or abbreviation thereof (alone or as part of another name) or any logos, seals, insignia or other words, names, symbols or devices that identify HHMI or any unit of HHMI (“HHMI Names”) or of any HHMI employee (including
[**]) in a manner that reasonably could constitute an endorsement of a commercial product or service; but that use for other purposes, even if commercially motivated, is permitted provided that (1) the use is limited to accurately reporting
factual events or occurrences, and (2) any reference to an HHMI Name or any HHMI employees (including [**]) in press releases or similar materials intended for public release is approved by HHMI in advance. 

  
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 11.3 Press Release. Notwithstanding the provisions of Section 11.2, in addition
to (and not in limitation of) the disclosure permitted under Section 11.1.4, the Parties shall agree on a public communications plan that shall define the nature and scope of the information relating to this Agreement and the relationship
between the Parties that shall be disclosed publicly and may issue a press release in such form as is consistent with such communications plan and mutually acceptable to the Parties (and any other Owner Institution to the extent of any reference to
such Owner Institution in such press release). Each Party agrees that it will not issue a press release or other public statement without obtaining the prior written approval of the other Party. Any use of HHMI Names or the name of any HHMI employee
(including [**]) in any such press release must be approved by HHMI in advance. 
 11.4 No Security Interest. Company shall not enter
into any agreement under which Company grants to or otherwise creates in any third party a security interest in this Agreement or any of the rights granted to Company herein. Any grant or creation of a security interest purported or attempted to be
made in violation of the terms of this Section 11.4 shall be null and void and of no legal effect. 
 11.5 Entire Agreement. This
Agreement is the sole agreement with respect to the subject matter hereof and, except as expressly set forth herein, supersedes all other agreements and understandings between the Parties with respect to the same. For the avoidance of doubt, this
Agreement shall not supersede the Cpf1 Agreement. 
 11.6 Notices. Unless otherwise specifically provided, all notices required or
permitted by this Agreement shall be in writing and may be delivered personally, or may be sent by facsimile, expedited delivery or certified mail, return receipt requested, to the following addresses of a Party, unless the other Party is
subsequently notified of any change of address in accordance with this Section 11.6: 
  

			
	If to Company (other than invoices):	  	 Verve Therapeutics, Inc.
 26 Landsdowne
Street
 Cambridge, MA 02139

		
	If to Company (invoices only):	  	 Verve Therapeutics, Inc.
 26 Landsdowne
Street
 Cambridge, MA 02139

		
	If to Licensor Institutions:	  	 The Broad Institute, Inc.
 Chief Operating
Officer
 415 Main Street
 Cambridge, MA 02142

Facsimile: [**]
 Attn: [**]

 
 AND
  

Office of Technology Development
 Harvard University

Richard A. and Susan F. Smith Campus Center, Suite 727
 1350
Massachusetts Avenue
 Cambridge, Massachusetts 02138

Facsimile: [**]
 Attn: [**]

  
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 Any notice shall be deemed to have been received as follows: (a) by personal delivery
or expedited delivery, upon receipt; (b) by facsimile, one business day after transmission or dispatch; (c) by certified mail, as evidenced by the return receipt. If notice is sent by facsimile, a confirming copy of the same shall be sent
by mail to the same address. 
 11.7 Dispute Resolution. The Parties agree that, in the event of any dispute arising out of or
relating to this Agreement (other than disputes arising under Section 3.5 or relating to nonpayment of amounts due to the Licensor Institutions hereunder or disputes affecting the rights or property of HHMI) (a “Dispute”),
either Party by written notice to the other Party may have such issue referred for resolution to the Chief Executive Officer of Company, the Chief Technology Development Officer of Harvard and the Chief Operating Officer of Broad (collectively, the
“Executive Officers”). The Executive Officers shall meet promptly to discuss the matter submitted and to determine a resolution. If the Executive Officers are unable to resolve the Dispute within [**] after it is referred to them,
then the Parties may pursue all other rights and remedies available to them under this Agreement, including the right to terminate the Agreement, and the matter may be brought by a Party as a Suit in a court of competent jurisdiction in accordance
with Section 11.8 hereof. 
 11.8 Governing Law and Jurisdiction. This Agreement will be governed by, and construed in accordance
with, the substantive laws of the Commonwealth of Massachusetts, without giving effect to any choice or conflict of law provision, except that questions affecting the construction and effect of any patent shall be determined by the law of the
country in which the patent shall have been granted in any competent forum in such country. Any action, suit or other proceeding arising under or relating to this Agreement (a “Suit”) shall be brought in a court of competent
jurisdiction in the Commonwealth of Massachusetts, and the Parties hereby consent to the sole jurisdiction of the state and federal courts sitting in the Commonwealth of Massachusetts. Each Party agrees not to raise any objection at any time to the
laying or maintaining of the venue of any Suit in any of the specified courts, irrevocably waives any claim that Suit has been brought in any inconvenient forum and further irrevocably waives the right to object, with respect to any Suit, that such
court does not have any jurisdiction over such Party. 
 11.9 Binding Effect. This Agreement shall be binding upon and inure to the
benefit of the Parties and their respective legal representatives, successors and permitted assigns. 
 11.10 Headings. Section and
subsection headings are inserted for convenience of reference only and do not form a part of this Agreement. 
 11.11 Counterparts.
The Parties may execute this Agreement in three (3) or more counterparts, each of which shall be deemed an original. 

  
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 11.12 Amendment; Waiver. This Agreement may be amended, modified, superseded or
canceled, and any of the terms may be waived, only by a written instrument executed by each Party or, in the case of waiver, by the Party waiving compliance. The delay or failure of either Party at any time or times to require performance of any
provisions hereof shall in no manner affect the rights at a later time to enforce the same. No waiver by either Party of any condition or of the breach of any term contained in this Agreement, whether by conduct, or otherwise, in any one or more
instances, shall be deemed to be, or considered as, a further or continuing waiver of any such condition or of the breach of such term or any other term of this Agreement. 

11.13 No Agency or Partnership. Nothing contained in this Agreement shall give either Party the right to bind the other, or be deemed to
constitute either Party as agent for or partner of the other or any third party. 
 11.14 Assignment and Successors. This Agreement
may not be assigned by Company, whether by operation of law or otherwise, without the consent of the Licensor Institutions, except that Company may assign or transfer the Agreement without the consent of the Licensor Institutions, to a successor in
interest of all or substantially all of Company’s assets or business related to the Licensed Products or the Agreement, whether by merger, consolidation, sale of assets, or Change of Control or other transaction, provided that (a) the
Company shall provide the Licensor Institutions with a written notice of such assignment or Change of Control including the identity of the assignee, transferee or controlling party, and a copy of the assignment and assumption agreement or other
documentary evidence sufficient to demonstrate Company’s compliance with this Section 11.14 within [**] after such assignment or Change of Control, and (b) such assignee or transferee agrees in writing to assume the obligations to the
Licensor Institutions and HHMI that are being assigned or transferred. An uncured failure of an assignee to agree to be bound by the terms hereof or an uncured failure of Company to notify the Licensor Institutions and provide copies of assignment
documentation as specified above shall be grounds for termination of this Agreement for default. Any attempted assignment in contravention of this Section 11.14 shall be null and void. 

11.15 Force Majeure. Neither Party shall be responsible for delays resulting from causes beyond the reasonable control of such Party,
including fire, explosion, flood, war, strike, or riot, provided that the nonperforming Party uses commercially reasonable efforts to avoid or remove such causes of nonperformance and continues performance under this Agreement with reasonable
dispatch whenever such causes are removed. 
 11.16 Interpretation. Each Party hereto acknowledges and agrees that: (a) it and/or
its counsel reviewed and negotiated the terms and provisions of this Agreement and has contributed to its revision; (b) the rule of construction to the effect that any ambiguities are resolved against the drafting Party shall not be employed in
the interpretation of this Agreement; (c) the terms and provisions of this Agreement shall be construed fairly as to both Parties hereto and not in favor of or against either Party, regardless of which Party was generally responsible for the
preparation of this Agreement; (d) all references herein to “dollars” or “$” shall mean United States Dollars; and (e) the use of “include,” “includes,” or “including” herein shall not be
limiting and “or” shall not be exclusive. Each Party hereto further acknowledges and agrees that nothing in this Agreement shall be construed to abridge the rights of Editas under the Editas Cas9-I
License Agreement and Editas Cas9-II License Agreement. 

  
 72 

 11.17 Severability. If any provision of this Agreement is or becomes invalid or is
ruled invalid by any court of competent jurisdiction or is deemed unenforceable, it is the intention of the Parties that the remainder of this Agreement shall not be affected. 

11.18 HHMI Third Party Beneficiary. HHMI is not a party to this Agreement and has no liability to Company or any licensee,
sublicensee, or user of anything covered by this Agreement, but HHMI is an intended third-party beneficiary of this Agreement and certain of its provisions are for the benefit of HHMI and are enforceable by HHMI in its own name. 

[The remainder of this page intentionally left blank; signature page follows] 

  
 73 

 IN WITNESS WHEREOF, the Parties have caused this Agreement to be executed by their
duly authorized representatives as of the Effective Date. 
 PRESIDENT AND FELLOWS OF HARVARD COLLEGE: 

 

			
	By:	 	 /s/ Isaac T. Kohlberg

	Name:	 	Isaac T. Kohlberg
	Title:	 	Sr. Associate Provost, Chief Technology Development Officer
	
	Office of Technology Development
	
	Harvard University

  

  
 [Signature Page to Cas9
License Agreement] 

 IN WITNESS WHEREOF, the Parties have caused this Agreement to be executed by their
duly authorized representatives as of the Effective Date. 
  

			
	THE BROAD INSTITUTE, INC.:
		
	By:	 	 /s/ Jesse Souweine

	Name: Jesse Souweine
	Title:   Chief Operating Officer

  

  
 [Signature Page to Cas9
License Agreement] 

 IN WITNESS WHEREOF, the Parties have caused this Agreement to be executed by their
duly authorized representatives as of the Effective Date. 
 VERVE THERAPEUTICS, INC.: 

 

			
	By:	 	 /s/ Andrew D. Ashe

	Name:	 	Andrew D. Ashe
	Title:	 	President & COO

  
 [Signature Page to Cas9
License Agreement] 

 Exhibit 1.166 

Targets 
 The Targets are: 

 

	 	•	 	 Proprotein convertase subtilisin/kexin type 9 (PCSK9) 

 

	 	•	 	 [**] 

  

	 	•	 	 [**] 

  
 77 

 Exhibit 3.1 

Development Milestones 

[**] 

  
 78 

 CONFIDENTIAL 

FIRST AMENDMENT TO 
 CAS9
LICENSE AGREEMENT 
 This FIRST AMENDMENT (the “Amendment”) is entered into as of this 18th day of December, 2019 (the
“Amendment Effective Date”), by and between, on the one hand, the President and Fellows of Harvard College, an educational and charitable corporation existing under the laws and the constitution of the Commonwealth of Massachusetts,
having a place of business at Smith Campus Center, Suite 727, 1350 Massachusetts Avenue, Cambridge, MA 02138 (“Harvard”) and The Broad Institute, Inc., a non-profit Massachusetts corporation,
with a principal office at 415 Main Street, Cambridge, MA 02142 (“Broad,” together with Harvard, the “Licensor Institutions” and each individually, a “Licensor Institution”) and, on
the other hand, Verve Therapeutics, Inc., a Delaware corporation, with a principal office at 26 Landsdowne Street, Cambridge, MA 02139 (“Company”). Company and the Licensor Institutions are each referred to herein as a
“Party” and together, the “Parties.” 
 WHEREAS, the Parties entered into that certain Cas9 License Agreement dated
March 15, 2019 (the “Cas9 License”) pursuant to which, among other things, the Licensor Institutions granted to Company certain rights with respect to certain identified Targets; and 

WHEREAS, the Parties now wish to amend the Cas9 License to identify ANGPTL3 as an additional Target, as set forth in this Amendment. 

NOW, THEREFORE, the Parties hereto, intending to be legally bound, hereby agree as follows: 

 

	1.	 Defined Terms. Capitalized terms used in this Amendment and not defined herein shall have the meaning
given to such terms in the Cas9 License, unless otherwise specified herein. 

  

	2.	 Exhibit 1.166. Exhibit 1.166 of the Cas9 License is hereby deleted in its entirety and replaced with
Exhibit 1.166 attached hereto. 

  

	3.	 No Other Modification. Except as specifically set forth in this Amendment, the terms and conditions of
the Cas9 License shall continue in full force and effect and shall apply to this Amendment. This Amendment is the sole agreement with respect to the subject matter of this Amendment and, except as expressly set forth herein, supersedes all other
agreements and understandings between the Parties with respect to the same. For the avoidance of doubt, this Amendment shall not supersede the Cpf1 Agreement. This Amendment may be amended, modified, superseded or canceled, and any of the terms may
be waived, only by a written instrument executed by each Party or, in the case of waiver, by the Party waiving compliance. 

  

	4.	 Miscellaneous. The Parties may execute this Amendment in three (3) or more counterparts, each of
which shall be deemed an original. This Amendment will be governed by, and construed in accordance with, the substantive laws of the Commonwealth of Massachusetts, without giving effect to any choice or conflict of law provision.

 [The remainder of this page intentionally left blank; signature page follows] 

  
 1 

 IN WITNESS WHEREOF, the Parties have caused this Amendment to be executed by their
duly authorized representatives as of the Amendment Effective Date. 
  

			
	PRESIDENT AND FELLOWS OF HARVARD COLLEGE:
		
	By:	 	 /s/ Isaac T. Kohlberg

	Name: Isaac T. Kohlberg
	Title:   Senior Associate Provost
	
	Chief Technology Development Officer
	
	Office of Technology Development

  

  
 [Signature Page to Cas9
License Amendment] 

 IN WITNESS WHEREOF, the Parties have caused this Amendment to be executed by their
duly authorized representatives as of the Amendment Effective Date. 
  

			
	THE BROAD INSTITUTE, INC.:
		
	By:	 	 /s/ Jesse Souweine

	Name: Jesse Souweine
	Title:   Chief Operating Officer

  

  
 [Signature Page to Cas9
License Amendment] 

 IN WITNESS WHEREOF, the Parties have caused this Amendment to be executed by their duly authorized
representatives as of the Amendment Effective Date. 
 VERVE THERAPEUTICS, INC.: 

 

			
	By:	 	 /s/ Andrew D. Ashe

	Name:	 	Andrew D. Ashe
	Title:	 	President & COO

  
 [Signature Page to Cas9
License Amendment] 

 Exhibit 1.166 

Targets 
 The Targets are: 

 

	 	•	 	 Proprotein convertase subtilisin/kexin type 9 (PCSK9) 

 

	 	•	 	 [**] 

  

	 	•	 	 [**] 

  

	 	•	 	 Angiopoietin-like 3 (ANGPTL3)EX-10.13

 Exhibit 10.13 

SUBLEASE 
 This SUBLEASE is
made as of April 13, 2020, by and between FOGHORN THERAPEUTICS INC., a Delaware corporation having an address at 100 Binney Street, Suite 610, Cambridge, Massachusetts 02142 (“Sublandlord”) and VERVE THERAPEUTICS INC., a
Delaware corporation having an address at 215 First Street, Suite 440, Cambridge, MA 02142 (“Subtenant”). 
 RECITALS:

 A. Pursuant to that Lease dated as of October 23, 2019 by and between ARE-TECH SQUARE,
LLC, as “Landlord” (“Prime Lessor”) and Sublandlord, as “Tenant” (such lease, as so amended, and all renewals, modifications and extensions thereof are hereinafter collectively referred to as the “Prime
Lease”), a true and complete copy of which (with certain economic terms redacted) has been provided to Subtenant, whereby Sublandlord leases approximately 81,441 rentable square feet of space in the building known as and numbered 500
Technology Square, Cambridge, Massachusetts (the “Building”) (all as more particularly described in the Prime Lease the “Premises”); 

B. A portion of the Premises consists of the entire 9th floor of the Building designated
as Suite 901, containing approximately 18,980 rentable square feet (the “Ninth Floor Premises”); 
 C. A portion of the
Premises consists of a portion of the 1st floor of the Building designated as Suite 101(a) containing approximately 371 rentable square feet (the “Initial First Floor Premises”);

 D. A portion of the Premises consists of a portion of the basement level of the Building designated as Suite 001a, containing
approximately 472 rentable square feet (the “Initial Lower Level Premises”); 
 E. Subtenant desires to sublease certain
portions of the Premises from Sublandlord and Sublandlord is willing to sublease the same, all on the terms and conditions hereinafter set forth; 

NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties covenant and
agree as follows, and capitalized terms used herein without definition shall have the meaning ascribed thereto in the Prime Lease: 

 1. Sublease of Subleased Premises. For the rent and upon the terms and conditions
herein, Sublandlord hereby subleases to Subtenant, and Subtenant hereby subleases from Sublandlord: 
  

	 	(i)	 Effective on the Commencement Date, defined below, a portion of the Ninth Floor Premises containing
approximately 16,000 rentable square feet as shown on Exhibit A-1 attached hereto (the “Ninth Floor Subleased Premises”); 

 

	 	(ii)	 Effective on the Commencement Date, the Initial First Floor Premises containing approximately 371 rentable
square feet as shown on Exhibit A-2 attached hereto (the “First Floor Subleased Premises”); and 

 

	 	(iii)	 Effective on the Commencement Date, the Initial Lower Level Premises containing approximately 472 rentable
square feet as shown on Exhibit A-3 attached hereto (the “Lower Level Subleased Premises” and together with the Ninth Floor Subleased Premises and the First Floor Subleased
Premises, collectively, the “Subleased Premises”). 

 This Sublease shall include Subtenant’s right to use on a non-exclusive basis with Sublandlord from the Commencement Date through and including the Expiration Date (in accordance with reasonable procedures for such shared use to be established by Sublandlord), the shared
glass wash facility located in the common area of the ninth floor of the Building as shown on Exhibit A-4 attached hereto (the “Ninth Floor Common Area”). 

2. Term. The term (the “Term”) of this Sublease with respect to the Subleased Premises shall commence upon the date (the
“Commencement Date”) that is the later of (i) the date on which the Consent Contingency (as hereinafter defined) has been satisfied and the Sublease has been fully executed by Sublandlord and Subtenant and (ii) March 15,
2020, and shall expire at 11:59 p.m. on the day immediately prior to the second (2nd) anniversary of the Rent Commencement Date, as defined below (the “Expiration Date”), unless the Term is earlier terminated pursuant to any of the terms
or provisions of the Prime Lease, this Sublease or applicable law. When the Commencement Date is determined, Sublandlord and Subtenant shall, upon the request of either of them, execute a statement to be prepared by Sublandlord setting forth such
date. 

  
 -2- 

 3. Base Rent. (A) Subtenant shall pay to Sublandlord the following amounts as base
rent (the “Base Rent”) in equal monthly installments commencing on the Commencement Date (subject to the provisions of Paragraph 3(E) below) and thereafter on the first day of each calendar month during the Term: 

For the Subleased Premises (i.e., approximately 16,843 rentable square feet): 
  

													
	 Term
	  	Total Rent	 	  	Monthly Rent	 	  	Rent Per Square
Foot	 
	 Commencement Date- day prior to first anniversary of Commencement Date
	  	$	1,650,614.00	 	  	$	137,551.17	 	  	$	98.00	 
	 First anniversary of Commencement Date – Expiration Date
	  	$	1,700,132.42	 	  	$	141,677.70	 	  	$	100.94	 

 Notwithstanding anything in this Sublease to the contrary, on the date of execution of this Sublease by Subtenant, Subtenant
shall pay to Sublandlord the amount of $137,551.17, which amount shall be credited against Base Rent for the Subleased Premises due for the first month of the Term of this Sublease. 

(B) In addition to Base Rent, commencing on the Rent Commencement Date, Subtenant shall pay as additional rent the Subtenant’s Percentage (as hereinafter
defined) of amounts from time to time payable by Sublandlord as “Tenant” to Prime Lessor as “Landlord” under Article 5 of the Prime Lease in respect of Operating Expenses (which includes Taxes), including any property
management fee (whether or not a third party property manager is engaged by Prime Lessor) included in Operating Expenses. Base Rent and additional rent shall sometimes be referred to as “Rent” herein. All Rent shall be due and
payable in monthly installments in advance on the first day of each calendar month, without demand, deduction, counterclaim or setoff. All Rent payments should be sent to Sublandlord at the address first noted above to the attention of Fanny Cavalie
or such other address as Sublandlord shall notify Subtenant in accordance with the terms of Paragraph 16 of this Sublease. Rent for any partial month shall be prorated and paid on the first day of such month. Notwithstanding the foregoing, Subtenant
shall pay Subtenant’s Percentage of any initial or revised Annual Estimate of Operating Expenses within fifteen (15) days after receipt of such Annual Estimate of Operating Expenses prepared by Prime Lessor, and Article 5 of the Prime
Lease, as incorporated herein by reference pursuant to Paragraph 10, shall be deemed modified accordingly. Once the Annual Estimate of Operating Expenses is set by Prime 

  
 -3- 

 
Lessor, Subtenant shall pay Subtenant’s Percentage of such Annual Estimate of Operating Expenses at the same time Subtenant pays Rent under this Sublease. Sublandlord shall deliver to
Subtenant reasonably promptly upon receiving the same true correct and complete copies of all Annual Estimates and Annual Statements of Operating Expenses, invoices or bills for Rent or other charges delivered to Sublandlord by Prime Lessor under
the Prime Lease. Subtenant shall continue to pay Subtenant’s Percentage of Operating Expenses so long as Sublandlord is required to continue paying Operating Expenses under the Prime Lease even if Sublandlord has not received the Annual
Estimates or Annual Statements of Operating Expenses from Prime Lessor. Notwithstanding anything in this Sublease to the contrary, if pursuant to the terms of the Prime Lease the rent due under the Prime Lease with respect to the Subleased Premises
is abated in whole or in part during the Term due to a casualty in the Subleased Premises, then the Rent due under this Sublease shall abate for the same period and to the same extent as the rent for the Premises is abated pursuant to the Prime
Lease. 
 Subtenant shall also pay as additional rent for all other expenses for which Sublandlord is or would be responsible under the Prime Lease to the
extent such expenses relate to the Subleased Premises (e.g., after hours HVAC ordered by Subtenant) or Subtenant’s use of the Ninth Floor Common Area. 

(C) As used herein, “Subtenant’s Percentage” shall mean that percentage that from time to time constitutes the ratio that the rentable
square feet in the Subleased Premises bears to the rentable square feet in the Premises. As of the Commencement Date, Subtenant’s Percentage shall be 29.15%. As of June 1, 2020, Subtenant’s Percentage shall be 20.68%. 

(D) Subtenant shall pay for all other expenses, without mark-up by Sublandlord, specific to the Subleased Premises and
the Ninth Floor Common Area to the extent incurred by Sublandlord or caused by Subtenant’s actions. 
 (E) Notwithstanding the foregoing provisions of
this Paragraph 3, if and for so long as no default has occurred, Sublandlord agrees to waive payment of the monthly installments of Base Rent for the Subleased Premises (together with any additional rent attributable to Subtenant’s use and
occupancy of the Subleased Premises and utility charges as described in Paragraph 4 of this Sublease) for the period commencing on the Commencement Date and ending on the date that is the sooner to occur of (i) the date upon which Subtenant
occupies the Subleased Premises for the ordinary conduct of business with more than four (4) employees so conducting business in the Subleased Premises at any given time, and (ii) three (3) weeks from the date that the City of Cambridge
Inspectional Services Department, Building Division, resumes conducting inspections and Massachusetts Executive Order COVID-19 Order No. 13 is withdrawn, rescinded or otherwise rendered inapplicable to
construction activities by any governmental authority having jurisdiction, so that construction can occur (the “Rent Waiver Period”). As used herein, the “Rent Waiver
Amount” shall mean the total 

  
 -4- 

 
amount of Rent and utility charges that is subject to waiver during the Rent Waiver Period. The day immediately following the last day of the Rent Waiver Period is referred to herein as the
“Rent Commencement Date”. If the Rent Waiver Period ends on a day that is not the last day of a calendar month, then on the first day of such calendar month Subtenant shall make a pro-rated
payment of Base Rent (calculated on a per diem basis) for the balance of the partial calendar month in which the Rent Waiver Period expires. Additional rent for the balance of such partial calendar month shall be payable by Subtenant to Sublandlord
as and when invoiced, and utility charges for such partial calendar month shall be payable directly by Subtenant commencing on the Rent Commencement Date in accordance with Paragraph 4 below). 

4. Electricity. Commencing on the Rent Commencement Date, Subtenant shall pay to Sublandlord within thirty (30) days of being
invoiced therefor, Subtenant’s Percentage of all electricity charges paid by Sublandlord for the Subleased Premises (whether paid by Sublandlord to the utility provider or to Prime Lessor) (including, but not limited to the consumption of
lights, outlets and heating, ventilation and air conditioning serving the Subleased Premises).  
 Subtenant shall also (i) pay for all other
utilities used in the Subleased Premises (including, without limitation, the right to use shared compressed air, central vacuum, RO water systems (if applicable) and, to the extent agreed by Sublandlord, the right to access back-up emergency power) by paying to Sublandlord Subtenant’s Percentage for Building shared utilities at the cost charged to Sublandlord therefor without markup, but only to the extent such amounts are not
included in Operating Expenses and are payable by Sublandlord under the Prime Lease and (ii) pay directly for any utilities separately metered solely to the Subleased Premises in accordance with the Prime Lease. 

5. Permitted Use. Subtenant shall use the Subleased Premises only for the Permitted Use. Subtenant shall not do, suffer or permit
anything to be done in or upon the Subleased Premises except in accordance with and as permitted by the Prime Lease, this Sublease and applicable law. Subtenant shall comply with the certificate of occupancy relating to the Subleased Premises and
with all laws, statutes, ordinances, orders, rules, regulations and requirements of all federal, state and municipal governments and the appropriate agencies, officers, departments, boards and commissions thereof, and the board of fire underwriters
and/or the fire insurance rating organization or similar organization performing the same or similar functions, whether now or hereafter in force, applicable to the Subleased Premises. During the Term hereof, subject to the terms, conditions and
limitations of the Prime Lease and Prime Lessor’s exercise of any rights it may have thereunder to restrict access to the Building, Subtenant shall have access to the Subleased Premises twenty-four (24) hours a day, 7 days a week, 52 weeks
per year, subject to the terms of this Sublease. 

  
 -5- 

 6. Condition of Subleased Premises. 

(a) Subtenant represents that it has made or caused to be made a thorough examination and inspection of the Subleased Premises and is familiar
with the condition of every part thereof. Subtenant agrees that, except as expressly provided herein, (i) it enters into this Sublease without relying upon any representations, warranties or promises by Sublandlord, its agents, representatives,
employees or any other person in respect of the Building or the Subleased Premises, (ii) no rights, easements or licenses are acquired by Subtenant by implication or otherwise except as expressly set forth herein, (iii) Sublandlord shall
deliver the Subleased Premises broom-clean and otherwise in the condition which Sublandlord received the Subleased Premises from Prime Lessor and Sublandlord shall have no obligation to do any work in order to make the Subleased Premises suitable
and ready for occupancy and use by Subtenant, and (iv) the Subleased Premises are in satisfactory condition. Notwithstanding the foregoing, Subtenant acknowledges receipt from Prime Lessor of a decommissioning report with respect to the
Subleased Premises prepared by Ramboll US Corporation and dated March 17, 2020 (the “Decommissioning Report”) and has accepted the results set forth in the Decommissioning Report. Sublandlord represents and warrants to
Subtenant that Sublandlord has not physically occupied the Subleased Premises at any time, including from and after the date of the Decommissioning Report. 

(b) Subtenant shall keep and maintain the Subleased Premises, the furniture, fixtures and equipment therein (including, without limitation, all
laboratory-specific mechanical equipment) clean and in good order, repair and condition, except for reasonable wear and tear and damage by fire or other casualty or condemnation. To the extent agreed to by Prime Lessor, Subtenant shall be entitled
to the benefit of those obligations of Prime Lessor set forth in the Prime Lease as to Prime Lessor’s obligation to maintain Building Systems. 

(c) Subtenant shall make no alteration, installation, removal, addition or improvement in or to the Subleased Premises or to any other portion
of the Building without the prior written consent of each of Sublandlord and, if required pursuant to the terms of the Prime Lease, Prime Lessor, and then, only in compliance fully with the terms of this Sublease and the Prime Lease. Sublandlord may
withhold consent in its sole discretion to any alteration, installation, addition or improvement proposed by Subtenant. Sublandlord may require Subtenant to remove any and all alterations, installations, additions or improvements that Subtenant
makes to the Subleased Premises upon the expiration or termination of the Term, and to restore the Subleased Premises to its condition prior to such alterations, installations, additions or improvements. 

  
 -6- 

 (d) During the Term of the Sublease, and subject to Prime Lessor’s consent, Subtenant
may use 0.90 parking spaces in the Technology Square Garage per 1,000 rentable square feet of the Subleased Premises as allocated to Sublandlord pursuant to Section 10 of the Prime Lease. Such parking use by Subtenant shall, subject to Prime
Lessor’s consent, be at the same cost per space as charged to Sublandlord from time to time pursuant to the Prime Lease, and such use by Subtenant shall be in accordance with Section 10 of the Prime Lease as amended from time to time and
all published rules and regulations of the Landlord and/or the operator of the Technology Square Garage as to such parking use. 
 7.
Insurance. Subtenant shall maintain throughout the Term of this Sublease such insurance in respect of the Subleased Premises and the conduct and operation of business therein, with Sublandlord, Prime Lessor and Alexandria Real Estate
Equities, Inc., and their respective officers, directors, employees, managers, agents, invitees and contractors listed as additional insureds as is required of “Tenant” pursuant to the terms of the Prime Lease (including, without
limitation, Section 17 thereof as hereinafter incorporated by reference) with no penalty to Sublandlord or Prime Lessor resulting from deductibles or self-insured retentions effected in Subtenant’s insurance coverage, and with such other
endorsements and provisions as Sublandlord or Prime Lessor may reasonably request. If Subtenant fails to procure or maintain such insurance, pay all premiums and charges therefor and provide Sublandlord with certificate(s) thereof within ten
(10) days after notice from Sublandlord, Sublandlord may (but shall not be obligated to) do so, whereupon Subtenant shall reimburse Sublandlord upon demand for Sublandlord’s costs incurred in so doing. All such insurance policies shall, to
the extent obtainable, contain endorsements providing that (i) such policies may not be canceled except upon thirty (30) days’ prior notice to Sublandlord and Prime Lessor, (ii) no act or omission of Subtenant shall affect or
limit the obligations of the insurer with respect to any other named or additional insured and (iii) Subtenant shall be solely responsible for the payment of all premiums under such policies and Sublandlord, notwithstanding that it is or may be
a named insured, shall have no obligation for the payment thereof. Such insurance shall otherwise be reasonably acceptable to Sublandlord in both form and substance. On or before the Commencement Date, Subtenant shall deliver to Sublandlord and
Prime Lessor a certificate evidencing the coverages required by this Paragraph 7. Any endorsements to such certificates shall also be delivered to Sublandlord and Prime Lessor upon issuance thereof. Subtenant shall procure and pay for renewals of
such insurance from time to time before the expiration thereof, and Subtenant shall deliver to Sublandlord and Prime Lessor such renewal certificates at least ten (10) days before the expiration of any existing policy. In the event Subtenant
fails so to deliver any such renewal certificate at least ten (10) days before the expiration of any existing policy, then, in addition to its other rights and remedies in respect of such breach of this Sublease by Subtenant, Sublandlord shall
have the right, but not the obligation, to obtain such insurance on Subtenant’s behalf, whereupon Subtenant shall reimburse Sublandlord upon demand for Sublandlord’s costs incurred in so doing. 

  
 -7- 

 Sublandlord shall maintain in full force and effect during the Term of this Sublease, all
insurance required to be maintained by Sublandlord as the Tenant under the Prime Lease. 
 Subtenant shall include in all such insurance
policies any clauses or endorsements in favor of Prime Lessor including, but not limited to, waivers of the right of subrogation, which Sublandlord is required to provide as “Tenant” pursuant to the provisions of the Prime Lease. Subtenant
and Sublandlord each shall include in all insurance policies it is required to carry in accordance with this Sublease, all clauses or endorsements in favor of the other which Sublandlord is required to carry in favor of Prime Lessor under the Prime
Lease, including, but not limited to, waivers of the right of subrogation, which Sublandlord is required to provide as “Tenant” pursuant to the provisions of the Prime Lease. Subtenant releases and waives all claims against Sublandlord for
loss or damage to Subtenant’s personal property and its alterations in the Subleased Premises to the extent that such loss or damage is insurable under policies of casualty insurance Subtenant carries or is required to carry under this
Sublease. Sublandlord releases and waives all claims against Subtenant for loss or damage to Sublandlord’s personal property and its alterations in the Subleased Premises to the extent that such loss or damage is insurable under policies of
casualty insurance Sublandlord carries or is required to carry under the Prime Lease. 
 8. Indemnification. Subtenant agrees to
protect, defend (with counsel reasonably approved by Sublandlord), indemnify and hold Sublandlord and Prime Lessor and their respective officers, agents and employees harmless from and against any and all liabilities, claims, suits, demands,
judgments, costs, losses, interest and expenses (except to the extent arising from Sublandlord’s Work or any negligence or willful misconduct of Prime Lessor or Sublandlord or their contractors, invitees, agents or employees), arising from any
bodily injury to or death of persons, or damage to property occurring or resulting from an occurrence in the Subleased Premises during the Term hereof, or from any breach or default on the part of Subtenant in the performance of any covenant or
agreement on the part of Subtenant to be performed pursuant to the terms of this Sublease or from any willful misconduct or negligence on the part of Subtenant or any of its agents, employees, licensees, invitees or assignees or any person claiming
through or under Subtenant. Subtenant further agrees to indemnify Sublandlord and Prime Lessor and their respective officers, agents and employees from and against any and all liabilities, claims, suits, demands, judgments, costs, losses, interest
and expenses (including, without being limited to, reasonable attorneys’ fees and expenses), incurred in connection with any such indemnified claim or any action or proceeding brought in connection therewith. The provisions of this Paragraph
are intended to supplement any other indemnification provisions contained in this Sublease and in the Prime Lease to the extent incorporated by reference herein. Any non-liability, indemnity or hold harmless
provisions in the Prime Lease for the benefit of Prime Lessor that are incorporated herein by reference shall be deemed to inure to the benefit of Sublandlord and Prime Lessor. 

  
 -8- 

 9. No Assignment or Subletting. Subtenant shall not assign, sell, mortgage, pledge or
in any manner transfer this Sublease or any interest herein, or the Term or estate granted hereby or the rentals hereunder, or sublet the Subleased Premises or any part thereof, or grant any concession or license or otherwise permit occupancy of all
or any part of the Subleased Premises by any person without the prior written consent of Sublandlord, and if such transaction would require the consent of Prime Lessor under Section 22 of the Prime Lease, without the prior written consent of
Prime Lessor in accordance with Section 22 of the Prime Lease. Sublandlord‘s consent under this Paragraph 9 shall not be unreasonably withheld, conditioned or delayed. Any direct or indirect change in ownership of, or power to vote, a
majority of the ownership interests of Subtenant shall constitute a transfer requiring Sublandlord’s and Prime Lessor’s prior written consent hereunder, other than a Corporate Permitted Assignment, which shall not require the consent of
Sublandlord (but reasonable prior written notice thereof shall be provided to Sublandlord) and shall only require the consent of Prime Lessor to the extent required under Section 22 of the Prime Lease. Neither the consent of Sublandlord or
Prime Lessor to an assignment, subletting, concession, or license, nor the references in this Sublease to assignees, subtenants, concessionaires or licensees, shall in any way be construed to relieve Subtenant or any assignee, subtenant or sub-subtenant of the requirement of obtaining the consent of Sublandlord and Prime Lessor to any further assignment or subletting or to the making of any assignment, subletting, concession or license for all or any
part of the Subleased Premises, Subtenant and any such assignee, subtenant or sub-subtenant under this Sublease hereby agreeing to be bound by the provisions of this Sublease and the Prime Lease as to any
further assignment, subleasing or other arrangement for which consent is required under this Sublease or the Prime Lease. Notwithstanding any assignment or subletting, including, without limitation, any assignment or subletting permitted or
consented to, the original Subtenant named herein and any other person(s) who at any time was or were Subtenant shall remain fully liable under this Sublease, and all acts and omissions of any assignee or subtenant or anyone claiming under or
through any assignee or subtenant that shall be in conflict with the terms of this Sublease shall constitute a breach by Subtenant under this Sublease. If this Sublease is assigned, or if the Subleased Premises or any part thereof is underlet or
occupied by any person or entity other than Subtenant, Sublandlord may, after default by Subtenant, following notice and the expiration of any applicable cure period, collect rent from the assignee, undertenant or occupant, and apply the net amount
collected to the Rent payable by Subtenant hereunder, but no assignment, underletting, occupancy or collection shall be deemed a waiver of the provisions hereof, the acceptance of the assignee, undertenant or occupant as tenant, or a release of
Subtenant from the further performance by Subtenant of the covenants hereunder to be performed on the part of Subtenant. Any attempted assignment or subletting or other arrangement, whether by Subtenant or any assignee or subtenant of Subtenant,
without the prior written consent of the Sublandlord and Prime Lessor shall be void. 

  
 -9- 

 10. Primacy and Incorporation of Prime Lease. 

(a) This Sublease is and shall be subject and subordinate to the Prime Lease and to all matters to which the Prime Lease is or shall be subject
and subordinate, and to all amendments, modifications, renewals and extensions of or to the Prime Lease and Sublandlord purports hereby to convey, and Subtenant takes hereby, no greater rights than those accorded to or taken by Sublandlord as
“Tenant” under the terms of the Prime Lease. Subtenant covenants and agrees that it will perform and observe all of the provisions contained in the Prime Lease to be performed and observed by the “Tenant” thereunder to the extent
incorporated herein, but only as and to the extent applicable to the Subleased Premises, other than the payment of rent. Notwithstanding anything in this Sublease to the contrary, Subtenant shall have no obligation to (i) cure any default of
Sublandlord under the Prime Lease unless caused by Subtenant’s default under this Sublease, (ii) perform any obligation of Sublandlord under the Prime Lease relating to Sublandlord’s Work or any other alterations or improvements made
by or at the direction of Sublandlord or which arose prior to the Commencement Date, (iii) repair any damage to the Premises, including the Subleased Premises, caused by Sublandlord or Prime Lessor, (iv) remove any alterations or additions
installed within the Subleased Premises by or at the direction of Sublandlord or Prime Lessor or prior to the Commencement Date, (v) indemnify Sublandlord or Prime Lessor with respect to any negligence or willful misconduct of Sublandlord or
Prime Lessor or their respective agents, employees or contractors or (vi) discharge any liens on the Subleased Premises or the Building that arise out of any work performed, or claimed to be performed, by or at the direction of Sublandlord or
Prime Lessor, except work to be undertaken at Subtenant’s expense. Except to the extent inconsistent with the context hereof, capitalized terms used and not otherwise defined herein shall have the meanings ascribed to them in the Prime Lease.
Further, except as set forth below, the terms, covenants and conditions of the following specified provisions of the Prime Lease are incorporated herein by reference as if such terms, covenants and conditions were stated herein to be the terms,
covenants and conditions of this Sublease, so that except to the extent that they are inconsistent with or modified by the provisions of this Sublease, for the purpose of incorporation by reference each and every referenced term, covenant and
condition of the Prime Lease binding upon or inuring to the benefit of the “Landlord” thereunder shall, in respect of this Sublease and the Subleased Premises, be binding upon or inure to the benefit of Sublandlord, and each and every
referenced term, covenant and condition of the Prime Lease binding upon or inuring to the benefit of the “Tenant” thereunder shall, in respect of this Sublease, be binding upon or inure to the benefit of Subtenant, with the same force and
effect as if such terms, covenants and conditions were completely set forth in this Sublease: Sections: 5 (except for the last three paragraphs thereof), 7, 8, 10, 14, 15, 16, 17 (excluding the first paragraph), 20, 21, 23, 25, 26, 27 (except for
the proviso starting on the 5th line thereof) 28, 29, 30, 31, 32, 33, 34, 36, 37, 38 and 41(excluding 41(k)). Notwithstanding anything in this Sublease to the contrary, for purposes of this
Sublease, as to such incorporated terms, covenants and conditions: 

  
 -10- 

	 	(i)	 references in the Prime Lease to the “Premises” shall be deemed to refer to the “Subleased
Premises” hereunder; 

  

	 	(ii)	 references in the Prime Lease to “Landlord” and to “Tenant” shall be deemed to refer to
“Sublandlord” and “Subtenant” hereunder, respectively, except that where the terms “Landlord” is used in the context of ownership or management of the entire Building, such term shall be deemed to mean only “Prime
Lessor”; 

  

	 	(iii)	 references in the Prime Lease to “this Lease” shall be deemed to refer to “this Sublease”
(except when such reference in the Prime Lease is, by its terms (unless modified by this Sublease), a reference to any other section of the Prime Lease, in which event such reference shall be deemed to refer to the particular section of the Prime
Lease); 

  

	 	(iv)	 references in the Prime Lease to the “Commencement Date” shall be deemed to refer to the
“Commencement Date” hereunder; 

  

	 	(v)	 references in the Prime Lease to the “Fixed Rent,” “additional rent” and “rent”
shall be deemed to refer to the “Base Rent,” “additional rent” and “Rent”, respectively, as defined hereunder; and 

  

	 	(vi)	 references in the Prime Lease to the “Lease Term” shall be deemed to refer to the “Term” of
this Sublease. 

 The following provisions of the Prime Lease, Exhibits and Schedules annexed thereto are not incorporated
herein by reference and shall not, except as to definitions set forth therein, have any applicability to this Sublease: Sections: 1, 2, 3, 4, the last three paragraphs of Section 5, Sections 6, 9, 12, the first paragraph of 17, 18, 19, 22, the
proviso starting on the fifth line of Section 27, 32, 35, 39, 40 and 41(k); Exhibits A, B, C, D and F. 
 Where reference is made in
the following Sections to “Landlord”, the same shall be deemed to refer only to Prime Lessor and not Sublandlord: Sections: 7(c), 10, 11, 13 and the third and fifth paragraphs of Section 17. 

Where reference is made in the following Sections to “Landlord”, the same shall be deemed to refer to both Prime Lessor and
Sublandlord: Sections: the second paragraph of Section 17, Sections 24, 26, 32, and 33. 

  
 -11- 

 (b) Notwithstanding such incorporation by reference, Subtenant acknowledges that pursuant to
the Prime Lease, certain services, repairs, restorations, equipment and access to and for the Premises and insurance coverage of the Building are in fact to be provided by Prime Lessor and Sublandlord shall have no obligation to provide any such
services, repairs, restorations, equipment, access or insurance coverage. Subtenant agrees to look solely to Prime Lessor for the furnishing of such services, repairs, restorations, equipment, access and insurance coverage. Sublandlord shall
cooperate reasonably with Subtenant in attempting to obtain for Subtenant’s benefit the performance by Prime Lessor of its obligations under the Prime Lease, but Sublandlord shall in no event be obligated to commence litigation or other formal
proceedings, nor shall Sublandlord be liable to Subtenant, nor shall the obligations of Subtenant hereunder be impaired or the performance thereof excused, because of any failure or delay on Prime Lessor’s part in furnishing such services,
repairs, restorations, equipment, access or insurance coverage. 
 (c) Notwithstanding anything to the contrary contained in the Prime Lease,
the time limits (the “Notice Periods”) contained in the Prime Lease for the giving of notices, making of demands or performing of any act, condition or covenant on the part of the “Tenant” (including any grace periods set
forth in Section 19 of the Prime Lease), thereunder, or for the exercise by “Tenant” thereunder of any right, remedy or option, are changed for the purposes of incorporation herein by reference by shortening the same in each instance
by five (5) days (or by three (3) days if the notice period is ten (10) days or less), so that in each instance Subtenant shall have five (5) (or three (3), as applicable) fewer days to observe or perform hereunder than Sublandlord
has as “Tenant” under the Prime Lease; provided, however, that if the Prime Lease allows a Notice Period of five (5) days or less, then Subtenant shall nevertheless be allowed the number of days equal to one-half of the number of days in each Notice Period to give any such notices, make any such demands, perform any such acts, conditions or covenants or exercise any such rights, remedies or options; provided,
further, that if one-half of the number of days in the Notice Period is not a whole number, Subtenant shall be allowed the number of days equal to one-half of the number
of days in the Notice Period rounded up to the next whole number. 
 (d) Notwithstanding anything to the contrary contained in this Sublease
(including, without limitation, the provisions of the Prime Lease incorporated herein by reference), Sublandlord makes no representations or warranties whatsoever with respect to the Subleased Premises, this Sublease, the Prime Lease or any other
matter, either express or implied, except as expressly set forth herein, except further that Sublandlord represents and warrants, as of the date of execution hereof, (i) that it is the holder of the interest of the “Tenant” under the
Prime Lease and said interest is not the subject of any lien, assignment, conflicting sublease, or other hypothecation or pledge, (ii) that the Prime Lease is in full force and effect, unmodified and constitutes the entire agreement between
Prime Lessor and Sublandlord in respect of the Subleased Premises, (iii) that no notices of default have been served on Sublandlord under the Prime Lease which have not been cured and (iv) to the best of Sublandlord’s knowledge,
neither Sublandlord nor Prime Lessor is in default under the Prime Lease. 

  
 -12- 

 11. Certain Services and Rights. Except to the extent otherwise expressly provided in
Paragraph 10(b) of this Sublease, the only services or rights to which the Subtenant is entitled hereunder, including without limitation rights relating to the repair, maintenance and restoration of the Subleased Premises, are those services and
rights to which Sublandlord is entitled under the Prime Lease. Subtenant acknowledges and agrees that Sublandlord shall have no obligation to furnish any services whatsoever to Subtenant, any such obligation being that of Prime Lessor under the
Prime Lease, and that, as set forth in Paragraph 10(b) of this Sublease, the sole obligation of Sublandlord hereunder with respect to such services is to cooperate reasonably with Subtenant to obtain Prime Lessor’s performance. Notwithstanding
anything in this Sublease to the contrary, all cleaning and janitorial services to the Subleased Premises shall be provided by Subtenant at its sole cost and expense. 

12. Compliance with Prime Lease. 
  

	 	(i)	 Subtenant shall neither do nor permit anything to be done that could, after notice and failure to timely cure,
if applicable, cause the Prime Lease to be terminated or forfeited by reason of any right of termination or forfeiture reserved or vested in Prime Lessor under the Prime Lease as a result of a “Tenant” default under the Prime Lease, and
Subtenant shall defend, indemnify and hold Sublandlord harmless from and against any and all liabilities, claims, suits, demands, judgments, costs, losses, interest and expenses (including, without being limited to, reasonable attorneys’ fees
and expenses) of any kind whatsoever by reason of any breach or default on the part of Subtenant by reason of which the Prime Lease is or could be so terminated or forfeited. Subtenant covenants and agrees that Subtenant will not do anything that
would constitute a default under the provisions of the Prime Lease or omit to do anything that Subtenant is obligated to do under the terms of this Sublease that would constitute a default under the Prime Lease. 

 

	 	(ii)	 Sublandlord covenants and agrees that Sublandlord: (i) shall cause all rent to be paid under the Prime
Lease as and when due and payable under the Prime Lease; (ii) shall observe and perform the other terms, provisions, covenants and conditions of the Prime Lease to be observed and performed by Sublandlord, except and to the extent that such
terms, provisions, covenants and conditions are assumed by Subtenant hereunder; (iii) shall not 

  
 -13- 

	 	
amend the Prime Lease in a manner adverse to Subtenant in any material respect; (iv) shall not knowingly take any action or knowingly fail to perform any act that results in a breach or
default under the Prime Lease to the extent any such failure to perform such act adversely affects the rights of Subtenant under this Sublease, including, without limitation, the right of Subtenant to receive all services, utilities, repairs and
restorations to be provided by Landlord to Sublandlord under the Prime Lease with respect to the Subleased Premises or the ability of Subtenant to seek or obtain the approval or consent of Landlord or the right of Subtenant to use and occupy the
Subleased Premises for the purposes set forth in this Sublease. Sublandlord shall not be deemed to have made any representation made by Landlord in any of the incorporated provisions. Should the Prime Lease expire or terminate during the Term for
any reason, this Sublease shall terminate on the date of such expiration or termination of the Prime Lease, with the same force and effect as if such expiration or termination date had been specified in this Sublease as the Termination Date and
Sublandlord shall have no liability to Subtenant in the event of any such expiration or termination except to the extent such termination is solely and directly caused by an Event of Default by Sublandlord under the Prime Lease not caused by a
default by Subtenant hereunder. 

 13. Default. If Subtenant shall default in any of its obligations hereunder beyond
applicable cure periods, Sublandlord shall have available to it all of the rights and remedies available to Prime Lessor under the Prime Lease, including without limitation Sections 20 and 21 thereof as incorporated herein by reference, as though
Sublandlord were the “Landlord” thereunder and Subtenant the “Tenant” thereunder. If Subtenant shall default in any of its obligations hereunder beyond applicable cure periods, Subtenant further agrees to reimburse the Rent
Waiver Amount to Sublandlord, and to reimburse Sublandlord for all costs and expenses, including reasonable attorneys’ fees, incurred by Sublandlord in asserting or enforcing its rights hereunder against Subtenant or any assignee, sub-subtenant or other person claiming under Subtenant. 
 14. Brokerage. Subtenant and Sublandlord
represent that they have not dealt with any broker in connection with this Sublease other than CB Richard Ellis (the “Broker”). Each party agrees to indemnify and hold harmless the other from and against any and all liabilities,
claims, suits, demands, judgments, costs, losses, interest and expenses (including, without being limited to, reasonable attorneys’ fees and expenses) which the indemnified party may be subject to or suffer by reason of any claim made by any
person, firm or corporation other than the Broker for any commission, expense or other compensation as a result of the execution and delivery of 

  
 -14- 

 
this Sublease, which is based on alleged conversations or negotiations by said person, firm or corporation with the indemnifying party. Sublandlord shall pay the Broker(s) the brokerage
commission due the Broker in connection with this Sublease under separate agreement between Sublandlord and Broker. 
 15. Security
Deposit. (a) To secure the full and prompt payment by Subtenant of all amounts due under this Sublease and the performance of all obligations of Subtenant hereunder, Subtenant shall, simultaneously with the execution and delivery of this
Sublease, provide Sublandlord with an irrevocable standby letter of credit (the “Letter of Credit”) in the amount of Four Hundred Twelve Thousand Six Hundred Fifty-Four Dollars ($412,654.00) (the “Stated Amount)
substantially in the form attached hereto as Exhibit B issued by a bank or other financial institution selected by Subtenant (and reasonably approved by Sublandlord) with a window for the presentation of letters of credit in Boston,
Massachusetts, and otherwise reasonably acceptable to Sublandlord, in which the issuer unconditionally agrees to pay upon sight draft within three (3) business days the amount(s) from time to time drawn by Sublandlord. Any issuer of a Letter of
Credit hereunder shall, at a minimum, have long-term debt rated at least “A,” or the equivalent, by Standard & Poor’s Rating Group or “A,” or the equivalent, by Moody’s Investors Services Inc. and have capital
and surplus in excess of Five Hundred Million Dollars ($500,000,000). The following provisions and requirements shall apply to the Letter of Credit: 

(i) The initial expiration date of the Letter of Credit shall be the first anniversary of the Commencement Date and such
expiration date shall be automatically extended for additional periods of one (1) year each from such initial or each subsequent expiration date (except that the final expiration date shall be a date not less than sixty (60) days after the
expiration of the Term), unless, at least sixty (60) days prior to any such expiration date of the Letter of Credit, the issuer notifies Sublandlord in writing, by registered mail, courier service or hand delivery, that it elects not to extend
the expiration date. In such event, Subtenant shall, no later than thirty (30) days prior to the expiration date of the then current Letter of Credit, provide to Sublandlord a replacement Letter of Credit from another bank or financial
institution reasonably acceptable to Sublandlord meeting or exceeding the same minimum credit requirements as set forth in Paragraph 15(a), substantially in the form of the Letter of Credit initially issued. In addition, if the credit rating of an
issuer of a Letter of Credit furnished hereunder, as determined by any commercially recognized rating agency, falls below the level of credit rating required under Paragraph 15(a), then, upon notice to Subtenant, Sublandlord may require Subtenant to
provide a substitute Letter of Credit from a new issuer having a credit rating equivalent to that of the issuer at the time the then current Letter of Credit was furnished. If Sublandlord shall present, draw upon and apply or retain all or any
portion of the proceeds of the Letter of Credit, Subtenant shall upon notice from Sublandlord cause a substitute Letter of Credit in the form and Stated Amount and with an issuer all as required 

  
 -15- 

 
above to be furnished to Sublandlord so that at all times during the Term of this Sublease, Sublandlord shall be entitled to draw upon the full Stated Amount of the Letter of Credit
notwithstanding any prior presentation and draw thereon. Upon issuance of a substitute Letter of Credit, the current Letter of Credit shall be cancelled and surrendered. Failure to provide Sublandlord with a replacement Letter of Credit by the
expiration of the then expiring Letter of Credit or a substitute Letter of Credit within thirty (30) days of Sublandlord’s notice, as the case may be, shall be deemed a default by Subtenant without any further grace period applicable
thereto, on account of which Sublandlord shall have the immediate right to draw the entire Stated Amount due. 
 (ii) From and after the
occurrence of any default of Subtenant hereunder (beyond the expiration of any applicable notice or cure period), or upon the events described in Paragraphs 15(a)(i) or (iii) , Sublandlord may draw in full, or in part, upon the Letter of Credit and
apply all or any portion of the proceeds of the draw to remedy said default and to reimburse itself for any loss, cost, damage or expense incurred thereby, including, without limitation, thereafter accruing on account of a termination. Subtenant
shall thereafter immediately provide a supplementary letter of credit to Sublandlord in the amount of such draw, so that at all times Sublandlord shall hold a rent security deposit in the Stated Amount. 

(iii) In the event a petition is filed by the Subtenant seeking an adjudication of itself as bankrupt or insolvent under any bankruptcy law or
similar law or if any petition shall be filed or action taken to declare Subtenant a bankrupt or to delay, reduce or modify Subtenant’s debts or obligations or to reorganize or modify Subtenant’s capital structure or indebtedness or to
appoint a trustee, receiver or liquidator of Subtenant or if an involuntary petition in bankruptcy is filed against Subtenant, Sublandlord may draw against the Letter of Credit for any amount up to the Stated Amount paid by Subtenant to Sublandlord
within the applicable preference period on account of its obligations under this Sublease. The amount so drawn shall be held by Sublandlord in a segregated account until expiration of the preference period. If a preference claim is brought against
Sublandlord requiring Sublandlord to repay to the debtor’s estate the amount of any payments made by Subtenant to Sublandlord as a preference, Sublandlord may reimburse itself out of the funds drawn under the Letter of Credit and so held the
amount of the preference payments that Sublandlord is required to pay back to the debtor’s estate, together with reasonable attorneys’ fees and disbursements incurred by Sublandlord in connection with any claim by the debtor’s estate
for such payment. Any amounts drawn down in accordance with this subparagraph that are unexpended after expiration of the preference period shall be paid over to Subtenant, or its estate, as applicable. 

(iv) The Letter of Credit shall be fully transferable to any successor or assign of Sublandlord. 

  
 -16- 

 (v) If a draw is made against the Letter of Credit of the entire Stated Amount due to the
failure of the issuer to renew or the failure or inability of Subtenant to obtain a replacement or substitute Letter of Credit within the applicable period provided in Paragraph 15(a)(i), or either such condition, and unless this Sublease is
terminated by Sublandlord, the funds shall be held by Sublandlord as a security deposit for the performance of Subtenant’s obligations under the Sublease in accordance with the provisions of Paragraph 15(a)(vi) and shall be promptly paid to
Subtenant by Sublandlord upon Sublandlord’s receipt of a replacement or substitute Letter of Credit. 
 (b) In the event the proceeds of the Letter of
Credit are drawn under circumstances described in Paragraph 15(a)(v) and if the Sublease is not terminated, the proceeds so drawn shall be held as a security deposit (“Proceeds Security Deposit”) to secure the faithful performance
by Subtenant of all the covenants, conditions and agreements in this Sublease set forth and contained on the part of Subtenant to be fulfilled, kept, observed and performed including, but not by way of limitation, such covenants and agreements in
this Sublease which become applicable upon the termination of the same by re-entry or otherwise, in accordance with the following: (a) the Proceeds Security Deposit or any portion thereof not previously
applied, or from time to time, such one or more portions thereof, may be applied to the curing of any default that may then exist, without prejudice to any other remedy or remedies which Sublandlord may have on account thereof; (b) should the
Prime Lease be assigned by Sublandlord, the Proceeds Security Deposit or any portion thereof not previously applied shall be turned over to Sublandlord’s assignee or refunded to Subtenant within sixty (60) days thereafter, and if the same
be turned over as aforesaid, Subtenant hereby releases Sublandlord from any and all liability with respect to the Proceeds Security Deposit, its application or return; (c) if permitted by law, Sublandlord or its successor shall not be obligated
to hold the Proceeds Security Deposit as a separate fund, but on the contrary may commingle the same with its other funds; (e) if Subtenant shall not then be in default under this Sublease, the sum deposited or the portion thereof not
previously applied, shall be returned to Subtenant, without interest, no later than sixty (60) days after the expiration of the Term of this Sublease (or, if later, the date upon which any such default shall have been cured), provided Subtenant
has vacated the Premises and surrendered possession thereof to Sublandlord at the expiration of the Term or any extension or renewal thereof as provided herein; (f) in the event that Sublandlord terminates this Sublease or Subtenant’s
right to possession by reason of a default by Subtenant, Sublandlord may apply the Proceeds Security Deposit against damages suffered to the date of such termination or may retain the Proceeds Security Deposit to apply against such damages as may be
suffered or shall accrue thereafter by reason of Subtenant’s default, or both of them; (g) in the event any bankruptcy, insolvency, reorganization or other creditor-debtor proceedings shall be instituted by or against Subtenant, or its
successors or assigns, the Proceeds Security Deposit shall be deemed to be applied first to the payment of any Annual Fixed Rent or Additional Rent, or both, due Sublandlord 

  
 -17- 

 
for all periods prior to the institution of such proceedings, and the balance, if any, of the Proceeds Security Deposit may be applied by Sublandlord on account of Sublandlord’s damages. No
portion of the Proceeds Security Deposit, while held by Sublandlord, shall be deemed a “last month’s rent” or other payment on account of Subtenant’s monetary obligations, unless Sublandlord so specifies. The use and application
of the Proceeds Security Deposit shall be solely at the discretion of Sublandlord. The provisions of this Paragraph shall inure to the benefit of and be binding upon any subsequent transferee of Sublandlord. 

16. Notices. All notices, consents, approvals, demands, bills, statements and requests which are required or permitted to be given by
either party to the other hereunder shall be in writing and shall be governed by Section 41(a) of the Prime Lease as incorporated herein by reference, except that the mailing addresses for Sublandlord and Subtenant shall initially be those
first set forth above, and after the Commencement Date, to Subtenant at the Premises. Communications and payments to the Prime Lessor shall be given in accordance with, and subject to, Section 41(a) of the Prime Lease. 

17. Interpretation. Each covenant, agreement, obligation or other provision of this Sublease shall be deemed and construed as a
separate and independent covenant of the party bound by, undertaking or making the same, which covenant, agreement, obligation or other provision shall be construed and interpreted in the context of the Sublease as a whole. The word
“person” as used in this Sublease shall mean a natural person or persons, a partnership, a corporation or any other form of business or legal association or entity. 

18. Fire or Casualty; Eminent Domain. In the event the Subleased Premises (or access thereto or systems serving the same) are subjected
to a fire or other casualty or to a taking by eminent domain that interferes with the use and enjoyment by Subtenant of a material portion of the Subleased Premises, Subtenant shall, to the extent Sublandlord is entitled to an abatement of rent
pursuant to the Prime Lease, be entitled to an equitable adjustment of Rent until tenantable occupancy is restored. If the estimated time for repairs will exceed, or such interference has not been remedied and tenantable occupancy restored after,
one hundred eighty (180) days from the date such interference was first experienced, Sublandlord or Subtenant may, by notice to the other, terminate this Sublease. In the event of any taking of the Subleased Premises, Subtenant assigns to Prime
Lessor any right Subtenant may have to any damages or award. Subtenant shall not make claims against Sublandlord, Prime Lessor or the condemning authority for damages. 

19. Right to Cure Subtenant’s Defaults. If Subtenant shall at any time fail to make any payment or perform any other obligation of
Subtenant hereunder and fails to cure such default following notice and prior to expiration of the applicable cure period hereunder, then Sublandlord shall have the right, but not the obligation, after notice to Subtenant, or without notice to
Subtenant in the case of any emergency, and without 

  
 -18- 

 
waiving or releasing Subtenant from any obligations of Subtenant hereunder, to make such payment or perform such other obligation of Subtenant in such manner and to such extent as Sublandlord
shall deem necessary, and in exercising any such right, to pay any incidental costs and expenses, employ attorneys, and incur and pay reasonable attorneys’ fees. Subtenant shall pay to Sublandlord upon demand as additional rent all sums so paid
by Sublandlord and all incidental costs and expenses of Sublandlord in connection therewith, together with interest thereon at an annual rate equal to the rate two percent (2%) above the base rate or prime rate then published as such in the Wall
Street Journal, or, if less, the maximum rate permitted by law. Such interest shall be payable with respect to the period commencing on the date such expenditures are made by Sublandlord and ending on the date such amounts are repaid by
Subtenant. The provisions of this Paragraph shall survive the Expiration Date or the sooner termination of this Sublease. 
 20.
Termination of Prime Lease. If for any reason the term of the Prime Lease shall terminate prior to the Expiration Date, this Sublease shall thereupon automatically terminate and Sublandlord shall not be liable to Subtenant by reason thereof;
provided, however, that Sublandlord agrees that so long as Subtenant is not in default hereunder beyond delivery of written notice and expiration of the applicable cure period hereunder, Sublandlord shall not voluntarily surrender the
Prime Lease, except in accordance with rights expressly reserved to Sublandlord as “Tenant” under the Prime Lease, including, without limitation, such rights as are available under Sections 18 and 19 of the Prime Lease in the event of a
taking or casualty. Notwithstanding anything in this Sublease to the contrary, if the Prime Lease gives Sublandlord any right to terminate the Prime Lease in the event of the partial or total damage, destruction, or condemnation of the Subleased
Premises or the Building, the exercise of such right by Sublandlord shall not constitute a default or breach hereunder. Nothing herein shall prevent an assignment of the Prime Lease or the subleasing by Sublandlord of additional space covered by the
Prime Lease (excluding the Subleased Premises) to any third parties and in no event shall Sublandlord have any liability to Subtenant for any defaults or termination of the Prime Lease by such other subtenants or defaults under such other subleases.

 Upon the expiration or termination of this Sublease, whether by forfeiture, lapse of time or otherwise, or upon the termination of Subtenant’s right
of possession, Subtenant shall (i) remove (and restore any damage resulting from such removal) (a) any and all of Subtenant’s movable personal property and signage and (b) such alterations, installations, additions and
improvements, if any (expressly excluding Sublandlord’s Work) made by or on behalf of Subtenant that Sublandlord requires to be removed and restore the Subleased Premises to its condition prior to such alterations, installations, additions and
improvements, and (ii) at once surrender and deliver the Subleased Premises in the condition and repair required by, and in accordance with the provisions of, this Sublease. If Subtenant shall fail to remove any of Subtenant’s personal
property from the Subleased Premises, such property shall be deemed abandoned (and 

  
 -19- 

 
Subtenant will be deemed to have relinquished all right, title and interest in such property), and Sublandlord is authorized, without liability to Subtenant for loss or damage thereto, at the
sole risk of Subtenant, to (a) remove and store such property at Subtenant’s risk and expense; (b) retain such property, in which case all right, title and interest therein shall accrue to Sublandlord; (c) sell such property and
retain the proceeds from such sale; or (d) otherwise dispose or destroy such property. 
 21. No Privity of Estate. Nothing
contained in this Sublease shall be construed to create privity of estate or of contract between Subtenant and Prime Lessor and Prime Lessor is not obligated to recognize or to provide for the non-disturbance
of the rights of Subtenant hereunder. 
 22. No Waiver. The failure of Sublandlord to insist in any one or more cases upon the strict
performance or observance of any obligation of Subtenant hereunder or to exercise any right or option contained herein shall not be construed as a waiver or relinquishment for the future of any such obligation of Subtenant or any right or option of
Sublandlord. Sublandlord’s receipt and acceptance of Rent or electricity charge, or Sublandlord’s acceptance of performance of any other obligation by Subtenant, with knowledge of Subtenant’s breach of any provision of this Sublease,
shall not be deemed a waiver of such breach. No waiver by Sublandlord of any term, covenant or condition of this Sublease shall be deemed to have been made unless expressed in writing and signed by Sublandlord. 

23. Complete Agreement. This Sublease constitutes the entire agreement between the parties and there are no representations,
agreements, arrangements or understandings, oral or written, between the parties relating to the subject matter of this Sublease which are not fully expressed in this Sublease. This Sublease cannot be changed or terminated orally or in any manner
other than by a written agreement executed by both parties. This Sublease may be executed in several counterparts, each of which shall be deemed an original, and all of such counterparts together shall constitute one and the same instrument.
Signatures transmitted electronically (by pdf) shall be binding as originals. 
 24. Successors and Assigns. The provisions of this
Sublease, except as herein otherwise specifically provided, shall extend to bind and inure to the benefit of the parties hereto and their respective personal representatives, heirs, successors and permitted assigns. 

25. Waiver of Jury Trial and Right to Counterclaim. The parties hereto hereby waive any rights which they may have to trial by jury in
any summary action or other action, proceeding or counterclaim arising out of or in any way connected with this Sublease, the relationship of Sublandlord and Subtenant, the Subleased Premises and the use and occupancy thereof, and any claim for
injury or damages. Subtenant also hereby waives all right to assert or interpose a counterclaim (other than mandatory or compulsory counterclaims) in any summary proceeding or other action or proceeding to recover or obtain possession of the
Subleased Premises. 

  
 -20- 

 26. Consent of Prime Lessor. Notwithstanding anything contained herein, the
effectiveness of this Sublease is subject to and conditioned upon the written approval hereof and consent hereto by Prime Lessor in form reasonably acceptable to Sublandlord and Subtenant (the “Consent”). This Sublease shall not
become effective unless and until the Consent is fully executed and delivered by Prime Lessor, Sublandlord and Subtenant (the “Consent Contingency”). Each of Sublandlord and Subtenant agrees to execute and deliver the Consent in the
form provided by Prime Lessor and reasonably approved by Sublandlord and Subtenant. 
 27. Limitation of Liability. No director,
officer, shareholder, employee, adviser or agent of either Sublandlord or Subtenant shall be personally liable in any manner or to any extent under or in connection with this Sublease. In no event shall either Sublandlord, Subtenant or any of their
respective directors, officers, shareholders, employees, advisers or agents be responsible for (i) any incidental, indirect or consequential/special or punitive damages (except that Subtenant shall be liable for such damages under Paragraph 28
of this Sublease), (ii) any damages in the nature of interruption or loss of business (except that Subtenant shall be liable for such damages under Paragraph 28 of this Sublease) or (iii) claims for constructive eviction, nor shall Sublandlord
be liable for loss of or damage to personal property of Subtenant, its agents, contractors, employees or invitees. 
 28. Holdover.
If Subtenant shall fail to surrender and deliver the Subleased Premises as and when required hereunder, Subtenant shall become a tenant at sufferance only, subject to all of the terms, covenants and conditions herein specified, except the rate of
Base Rent shall increase to (i) 150% of the rate of Base Rent then in effect for the first thirty (30) days of such holdover and (ii) thereafter Sublessee shall pay 200% of the rate of Base Rent then in effect for the remainder of such
holdover. In addition, Subtenant agrees to protect, defend (with counsel reasonably approved by Sublandlord), indemnify and hold harmless Sublandlord and its officers, directors, agents and employees from and against any and all liability, claims,
suits, demands, judgments, costs, losses, interest and expenses (including, without being limited to, reasonable attorneys’ fees and expenses) that Sublandlord may suffer, under Section 8 of the Prime Lease or otherwise, by reason of any
holdover by Subtenant hereunder. If a holdover by Subtenant exceeds sixty (60) days, damages payable by Subtenant under this Section 28 shall not be limited to direct damages, but shall include incidental, indirect, consequential/special
or punitive damages and damages in the nature of interruption or loss of business. The terms and provisions of this Paragraph 28 shall survive the expiration or earlier termination of this Sublease. 

  
 -21- 

 29. Attorney’s Fees. If either Sublandlord or Subtenant shall bring any action
or legal proceeding for an alleged breach of any provision of this Sublease, to recover Rent, to terminate this Sublease or otherwise to enforce, protect or establish any term or covenant of this Sublease, the prevailing party shall be entitled to
recover as a part of such action or proceeding, or in a separate action brought for that purpose, reasonable attorneys’ fees, court costs, and expert fees as may be fixed by the court. 

30. Appurtenant Rights. Subtenant shall have (as appurtenant to the Subleased Premises) rights to use in common with Sublandlord and
others entitled thereto Sublandlord’s rights in driveways, walkways, hallways, stairways and passenger elevators convenient for access to the Subleased Premises. 

31. Surrender. Subtenant expressly acknowledges and agrees that it is required to comply with all of the provisions of Section 28
of the Prime Lease (as incorporated herein by reference) regarding surrender of the Subleased Premises, including, without limitation, hiring of a certified industrial hygienist to timely submit and perform a Decommissioning and HazMat Closure Plan
with respect to the Subleased Premises as described in said Section 28 of the Prime Lease. 
 32. Extension Option. Subtenant
shall have the right (the “Extension Right”) to extend the Term of this Sublease for a single additional period of three (3) months (the “Sublease Extension Term”) on the same terms and conditions as this
Sublease (other than Base Rent) by giving Sublandlord written notice of its election to exercise the Extension Right at least eight (8) months prior to the Expiration Date of the initial Term, which notice, once given, shall be irrevocable. If
Subtenant timely elects to exercise such right to the Sublease Extension Term, the Sublease Extension Term shall commence on the day immediately following the initial Expiration Date. During the Sublease Extension Term, Base Rent for each portion of
the Subleased Premises shall be payable at a rate equal to 103% of the rate in effect with respect to such portion of the Subleased Premised on the initial Expiration Date. The Extension Right is personal to Subtenant and shall not be assignable
without Sublandlord’s and Prime Lessor’s consent in their respective sole discretion, except that it may (subject to obtaining the consent of Prime Lessor to the extent required under Section 22 of the Prime Lease) be assigned in
connection with a Corporate Permitted Assignment of this Sublease. Notwithstanding the foregoing, Subtenant may not exercise the Extension Right (i) during any period of time that Subtenant is in default under any provision of this Sublease,
(ii) if Subtenant has been in default under any provision of this Sublease two (2) or more times, whether or not the defaults are cured, during the last year of the initial Term of this Sublease, or (iii) if Subtenant is not in
occupancy of at least eighty percent (80%) of the entire Subleased Premises both at the time of the exercise of the Extension Right and at the time of the commencement date of the Sublease Extension Term. The Extension Right shall terminate and be
of no further force or effect even after Subtenant’s due and timely exercise of the Extension Right, if after such exercise, but prior to the commencement date of the Sublease Extension Term, (i) Subtenant fails to timely cure any default
by Subtenant under this Sublease, or (ii) Subtenant has defaulted two (2) or more times during the period from the date of the exercise of the Extension Right to the date of the commencement of the Sublease Extension Term, whether or not
such defaults are cured. 

  
 -22- 

 33. Signage. Supplementing the provisions of Section 38 of the Prime Lease as
incorporated herein by reference, Subtenant shall, subject to the provisions of the Prime Lease and to Sublandlord’s prior written consent (which shall be granted provided that Prime Lessor similarly consents) and at Subtenant’s sole cost
and expense, have the right to Building standard signage at the entrance to the Subleased Premises and Subtenant’s pro-rata share of listings on any tenant directories maintained by Landlord at the
Building. 
 34. Survival. Paragraphs 3 (Base Rent), 4 (Electricity), 8 (Indemnification), 14 (Brokerage), 25 (Waiver of Jury Trial
and Right to Counterclaim), 27 (Limitation on Liability) and 31 (Surrender) of this Sublease shall survive the expiration or earlier termination of this Sublease. 

[remainder of page intentionally left blank] 

  
 -23- 

 IN WITNESS WHEREOF, Sublandlord and Subtenant have executed this Sublease as a sealed instrument as of the
date first written above. 
  

			
	SUBLANDLORD
	
	FOGHORN THERAPEUTICS INC.
		
	By:	 	 /s/ Adrian Gottschalk

		 	Name: Adrian Gottschalk
		 	Title: President & CEO
	
	SUBTENANT
	
	VERVE THERAPEUTICS, INC.
		
	By:	 	 /s/ Andrew D. Ashe

		 	Name: Andrew D. Ashe
		 	Title: President & COO

  
 -24- 

 EXHIBITS A-1 THOUGH
A-4 
 SUBLEASED PREMISES 

  
 -25- 

 EXHIBIT B 

FORM OF LETTER OF CREDIT 

[NAME AND OFFICE OF ISSUING BANK] 

IRREVOCABLE AND TRANSFERABLE 

LETTER OF CREDIT 
 LETTER OF CREDIT NO.
______________ 
 Date: ________, 2020 
 AMOUNT: $412,654.00

 [BENEFICIARY] 
  

	Re:	 Sublease dated , 2020, between FOGHORN THERAPEUTICS INC. and VERVE
THERAPEUTICS, INC/ (“Subtenant”). 

 Gentlemen: 

We hereby open our Irrevocable and Transferable Letter of Credit No. ________ in your favor for the account of _____________ in an aggregate
amount of up to $412,654.00. We hereby irrevocably authorize you to draw on us in accordance with the terms and conditions hereinafter set forth by one (1) or more demands for payment in an aggregate amount not exceeding the foregoing amount.
Partial drawings under this Letter of Credit are permitted. 
 Any demand for payment and all other communications relating to this Letter
of Credit shall be in writing and addressed and presented by hand or by reputable overnight courier or by certified mail or registered mail, return receipt requested to our Letter of Credit Section at our office at ____________________, Boston,
Massachusetts, and shall make specific reference to this Letter of Credit by number. Demand for payment under this Letter of Credit may be made prior to its expiration at any time during business hours at the foregoing office on a day (a
“Business Day”) on which we are open for the purpose of conducting commercial banking business. Payments under this Letter of Credit shall be made within three (3) business days after the date of presentment to us. 

This Letter of Credit shall expire at 5:00 P.M., Eastern Standard Time, on ___________________________ or, if such day is not a Business Day,
then on the next day following which is a Business Day. This Letter of Credit shall be considered automatically extended without amendment for periods of one year from the present or any future expiration date unless we notify you in writing at your
address set forth above (or in any transfer instruction, if applicable) presented by hand or by reputable overnight courier or by certified mail or registered mail, return receipt requested, not less than sixty (60) days prior to any such
expiration date that we elect not to consider this Letter of Credit renewed for any such additional period. The final expiry date of this Letter of Credit shall be [60 days after sublease expiration date including any renewal term]. 

  
 -26- 

 This Letter of Credit may be transferred one or more times in its entirety without our
consent and without cost to you upon presentation to us of (i) a written transfer instruction signed by you and naming the transferee and (ii) the original of this letter of credit. Upon such presentation, we shall issue a replacement
letter of credit in favor of the transferee in the form of this letter of credit. No other documents or presentations will be required by us in connection with any such transfer. Any and all transfer fees shall be charged to the account of
Subtenant. 
 This Letter of Credit sets forth in full our undertaking and such undertaking shall not in any way be modified, amended,
amplified or limited by reference to any document, instrument or agreement referred to herein; and any such reference shall be limited to the matter referred to and shall not be deemed to incorporate herein by reference any such document, instrument
or agreement. This Letter of Credit may not be amended without your written consent. 
 This letter of credit is issued subject to, and
shall be governed by, the International Standby Practices 1998, International Chamber of Commerce Publication No. 590. 
  

			
	Very truly yours,
	
	[Name of Issuing Bank]
		
	By:	 	  

	NAME:	 	
	TITLE:	 	

  
 -27- 

 FIRST AMENDMENT TO LEASE 

THIS FIRST AMENDMENT TO LEASE (this “Amendment”) is entered into as of July 17, 2020 (the “Effective
Date”), by and between FOGHORN THERAPEUTICS INC., a Delaware corporation having an address at 100 Binney Street, Suite 610, Cambridge, Massachusetts 02142 (“Sublandlord”) and VERVE THERAPEUTICS INC., a Delaware corporation having
an address at 215 First Street, Suite 440, Cambridge, MA 02142 (“Subtenant”). 
 RECITALS 

A. WHEREAS, Sublandlord and Subtenant entered into that certain Sublease dated as of April 13, 2020 (the “Existing
Sublease”), whereby Subtenant leases certain premises from Sublandlord (the “Existing Premises”) in the building at 500 Technology Square, Cambridge, Massachusetts (the “Building”); 

B. WHEREAS, the Existing Sublease was consented to by ARE-TECH SQUARE LLC (“Prime Lessor”)
pursuant to Consent to Sublease dated as of April 20, 2020 and executed among Sublandlord, Subtenant and Prime Lessor (the “Original Consent”); 

C. WHEREAS, Sublandlord desires to sublease to Subtenant and Subtenant desires to sublease from Sublandlord, additional premises comprising
approximately 2,980 square feet of Rentable Area (the “Additional Premises”) on the ninth (9th) floor of the Building, as depicted on Exhibit A attached hereto; 

D. WHEREAS, Sublandlord and Subtenant desire to modify and amend the Existing Sublease only in the respects and on the conditions hereinafter
stated. 
 AGREEMENT 

NOW, THEREFORE, Sublandlord and Subtenant, in consideration of the mutual promises contained herein and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound, agree as follows: 
 1.
Definitions. For purposes of this Amendment, capitalized terms shall have the meanings ascribed to them in the Existing Sublease unless otherwise defined herein. The Existing Sublease, as amended by this Amendment, is referred to collectively
herein as the “Sublease.” From and after the date hereof, the term “Sublease,” as used in the Existing Sublease, shall mean the Existing Sublease, as amended by this Amendment. 

2. Sublease of Additional Premises. Subject to satisfaction of the Amendment Consent Contingency, defined below, effective on the
Additional Premises Commencement Date (as hereinafter defined), Sublandlord hereby leases to Subtenant, and Subtenant hereby leases from Sublandlord, the Additional Premises. Subtenant’s leasing of the Additional Premises shall be upon all of
the same terms and conditions of Sublease applicable to the Existing Premises, except to the extent inconsistent with the provisions of this Amendment. From and after the Additional Premises Commencement Date, the term “Premises,”
as used in the Sublease, shall be deemed to include the Additional Premises. 

  
 1 

 3. Additional Premises Term. The Term of the Sublease for the Additional Premises
(the “Additional Premises Term”) shall commence on July 29, 2020 (the “Additional Premises Commencement Date”) and end on the date that is one month from the Additional Premises Rent Commencement Date, subject to a week-to-week extension as mutually agreed upon by the parties. The Additional Premises Term, together with the Term with respect to the Existing Premises, shall be referred to
collectively as the “Term.” Prior to entering upon the Additional Premises, Subtenant shall furnish to Sublandlord evidence satisfactory to Sublandlord that insurance coverages required of Subtenant under the provisions of the
Existing Sublease. 
 4. Additional Premises Rent. 

(a) Subtenant shall pay to Sublandlord as Base Rent for the Additional Premises, commencing on the Additional Premises Rent Commencement Date,
the sums set forth in Section 4(b) of this Amendment with respect to the Additional Premises. Notwithstanding anything herein to the contrary, the waiver contained in Section 3(E) of the Sublease shall not apply to
Subtenant’s obligation to pay Base Rent for the Additional Premises. 
 (b) Initial monthly and weekly installments of Base Rent for the
Additional Premises shall be as follows 
  

																					
	 Dates
	  	Square
Feet of
Rentable
Area	 	  	Rent per
Square
Foot of
Rentable
Area	 	  	Monthly
Rent	 	  	Weekly
Rent	 	  	Annualized
Rent	 
	 Additional Premises Rent Commencement Date –Rent Commencement Date
	  	 	2,980	 	  	$	98.00	 	  	$	24,336.67	 	  	$	5,616.15	 	  	$	292,040.00	 

 Payment for rent after the first month shall be made weekly and extend thereafter upon mutual agreement of the
parties on a week-to-week basis. To the extent Subtenant’s occupancy is for less than a week after a weekly payment has been made, Subtenant shall not be entitled
to any refund of the Base Rent paid for such week. 

  
 2 

 5. Condition of Additional Premises. Subtenant acknowledges that (a) it is fully
familiar with the condition of the Additional Premises and, notwithstanding anything contained in the Lease to the contrary, agrees to take the same in its condition “as is” as of the first day of the Additional Premises Term, and
(b) Sublandlord shall have no obligation to alter, repair or otherwise prepare the Additional Premises for Subtenant’s occupancy for the Additional Premises Term or to pay for any improvements to the Additional Premises. 

6. Consent of Prime Lessor. Notwithstanding anything contained herein, the effectiveness of this Amendment is subject to and
conditioned upon the written approval hereof and consent hereto by Prime Lessor in form reasonably acceptable to Sublandlord and Subtenant. This Amendment shall not become effective unless and until the Original Consent is amended in writing as
among Prime Lessor, Sublandlord and Subtenant to evidence Prime Lessor’s consent to this Amendment (the “Amendment Consent Contingency”). Each of Sublandlord and Subtenant agrees to execute and deliver an amendment to the Original
Consent in the form provided by Prime Lessor and reasonably approved by Sublandlord and Subtenant. 
 7. Effect of Amendment. Except
as modified by this Amendment, the Existing Sublease and all the covenants, agreements, terms, provisions and conditions thereof shall remain in full force and effect and are hereby ratified and affirmed as to both the Premises and the Additional
Premises. In the event of any conflict between the terms contained in this Amendment and the Existing Sublease, the terms herein contained shall supersede and control the obligations and liabilities of the parties. 

8. Successors and Assigns. Each of the covenants, conditions and agreements contained in this Amendment shall inure to the benefit of
and shall apply to and be binding upon the parties hereto and their respective heirs, legatees, devisees, executors, administrators and permitted successors and assigns and sublessees. Nothing in this section shall in any way alter the provisions of
the Lease restricting assignment or subletting. 
 9. Miscellaneous. This Amendment becomes effective only upon execution and
delivery hereof by Sublandlord and Subtenant. The captions of the paragraphs and subparagraphs in this Amendment are inserted and included solely for convenience and shall not be considered or given any effect in construing the provisions hereof.
All exhibits hereto are incorporated herein by reference. Submission of this instrument for examination or signature by Subtenant does not constitute a reservation of or option for a lease, and shall not be effective as a lease, lease amendment or
otherwise until execution by and delivery to both Sublandlord and Subtenant. 
 10. Authority. Subtenant guarantees, warrants and
represents that the individual or individuals signing this Amendment have the power, authority and legal capacity to sign this Amendment on behalf of and to bind all entities, corporations, partnerships, limited liability companies, joint venturers
or other organizations and entities on whose behalf such individual or individuals have signed. 

  
 3 

 11. Brokerage. Subtenant and Sublandlord represent that they have not dealt with any broker
in connection with this Amendment. Each party agrees to indemnify and hold harmless the other from and against any and all liabilities, claims, suits, demands, judgments, costs, losses, interest and expenses (including, without being limited to,
reasonable attorneys’ fees and expenses) which the indemnified party may be subject to or suffer by reason of any claim made by any person, firm or corporation for any commission, expense or other compensation as a result of the execution and
delivery of this Sublease, which is based on alleged conversations or negotiations by said person, firm or corporation with the indemnifying party. 

12. Surrender. Subtenant expressly acknowledges and agrees that it is required to comply with all of the provisions of Section 28
of the Prime Lease (as incorporated in the Existing Sublease and this Amendment by reference) regarding surrender of the Additional Premises, including, without limitation, hiring of a certified industrial hygienist to timely submit and perform a
Decommissioning and HazMat Closure Plan with respect to the Additional Premises as described in said Section 28 of the Prime Lease. 

13. Counterparts; Facsimile and PDF Signatures. This Amendment may be executed in one or more counterparts, each of which, when taken
together, shall constitute one and the same document. A facsimile or portable document format (PDF) signature on this Amendment shall be equivalent to, and have the same force and effect as, an original signature. 

[REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK] 

  
 4 

 IN WITNESS WHEREOF, Sublandlord and Subtenant have executed this Amendment as a sealed
Massachusetts instrument as of the date and year first above written. 
  

			
	SUBLANDLORD:
	
	 FOGHORN THERAPEUTICS, INC.,
 a
Delaware limited liability company

		
	By:	 	 /s/ Fanny Cavalié

	Name:	 	Fanny Cavalié
	Title:	 	VP, Head of Business and Operations
	
	SUBTENANT:
	
	 VERVE THERAPEUTICS, INC.,
 a
Delaware corporation

		
	By:	 	 /s/ Andrew D. Ashe

	Name:	 	Andrew D. Ashe
	Title:	 	President & COO

  

  
 5 

 EXHIBIT A 

Additional Premises Plan 

 SECOND AMENDMENT TO SUBLEASE 

THIS SECOND AMENDMENT TO SUBLEASE (this “Second Amendment”) is entered into as of January 20, 2021 (the
“Effective Date”), by and between FOGHORN THERAPEUTICS INC., a Delaware corporation having an address at 500 Technology Square, Suite 700, Cambridge, Massachusetts 02139 (“Sublandlord”) and VERVE THERAPEUTICS, INC.,
a Delaware corporation having an address at 500 Technology Square, Cambridge, MA 02139 (“Subtenant”). 
 RECITALS

 E. WHEREAS, Sublandlord and Subtenant entered into that certain Sublease dated as of April 13, 2020 (the “Original
Sublease”), as amended by that First Amendment (the “First Amendment”) dated as of July 17, 2020 (together with the Original Sublease, the “Existing Sublease”), whereby Subtenant leases certain
premises from Sublandlord (the “Existing Premises”) in the building at 500 Technology Square, Cambridge, Massachusetts (the “Building”); 

F. WHEREAS, the Original Sublease was consented to by ARE-TECH SQUARE LLC (“Prime
Lessor”) pursuant to that certain Consent to Sublease dated as of April 20, 2020 and executed among Sublandlord, Subtenant and Prime Lessor (the “Original Consent”), and the First Amendment was consented to by Prime
Lessor pursuant to that certain Consent to Sublease Amendment dated as of July 24, 2020 and executed among Sublandlord, Subtenant and Prime Lessor (the “Consent to Amendment”); 

G. WHEREAS, Sublandlord desires to sublease to Subtenant and Subtenant desires to sublease from Sublandlord, additional premises comprising
approximately 2,980 square feet of Rentable Area (the “Additional Premises”) on the ninth (9th) floor of the Building, as depicted on Exhibit A attached hereto; 

H. WHEREAS, Sublandlord and Subtenant desire to modify and amend the Existing Sublease only in the respects and on the conditions hereinafter
stated. 
 AGREEMENT 

NOW, THEREFORE, Sublandlord and Subtenant, in consideration of the mutual promises contained herein and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound, agree as follows: 
 14.
Definitions. For purposes of this Second Amendment, capitalized terms shall have the meanings ascribed to them in the Existing Sublease unless otherwise defined herein. The Existing Sublease, as amended by this Amendment, is referred to
collectively herein as the “Sublease.” From and after the date hereof, the term “Sublease,” as used in the Existing Sublease, shall mean the Existing Sublease, as amended by this Amendment. 

 15. Sublease of Additional Premises. Subject to satisfaction of the Second Amendment
Consent Contingency, defined below, effective on the Second Amendment Additional Premises Commencement Date (as hereinafter defined), Sublandlord hereby leases to Subtenant, and Subtenant hereby leases from Sublandlord, the Additional Premises.
Subtenant’s leasing of the Additional Premises shall be upon all of the same terms and conditions of Sublease applicable to the Existing Premises, except to the extent inconsistent with the provisions of this Amendment. From and after the
Second Amendment Additional Premises Commencement Date, the term “Premises,” as used in the Sublease, shall be deemed to include the Additional Premises. 

16. Second Amendment Additional Premises Term. The Term of the Sublease for the Additional Premises (the “Second Amendment
Additional Premises Term”) shall commence on the Second Amendment Additional Premises Commencement Date and end on the same date as the Term for the Existing Premises in the Existing Sublease. The Second Amendment Additional Premises Term,
together with the Term with respect to the Existing Premises, shall be referred to collectively as the “Term.” Prior to entering upon the Additional Premises, Subtenant shall furnish to Sublandlord evidence satisfactory to
Sublandlord that insurance coverages required of Subtenant under the provisions of the Existing Sublease. 
 17. Additional Premises
Rent. 
 (a) Subtenant shall pay to Sublandlord as Base Rent for the Additional Premises, commencing on February 1, 2021
(“Second Amendment Additional Premises Commencement Date”), the sums set forth in Section 4(b) of this Amendment with respect to the Additional Premises. Such payment shall be made at the same time and on
the same terms as the Rent payments set forth in the Existing Sublease. 
 (b) Base Rent for the Additional Premises shall be as follows 

 

																	
	 Dates
	  	Square
Feet of
Rentable
Area	 	  	Rent per
Square
Foot of
Rentable
Area	 	  	Monthly
Rent	 	  	Annualized
Rent	 
	 Second Amendment Additional Premises Rent Commencement Date – Day prior to first anniversary
of Commencement Date (as defined in Existing Sublease)
	  	 	2,980	 	  	$	98.00	 	  	$	24,336.67	 	  	$	292,040.00	 
	 First Anniversary of Commencement Date- Expiration Date
	  	 	2,980	 	  	 	100.94	 	  	$	25,066.77	 	  	$	300,801.20	 

  
 3 

 18. Condition of Additional Premises. Subtenant acknowledges that (a) it is
fully familiar with the condition of the Additional Premises and, notwithstanding anything contained in the Lease to the contrary, agrees to take the same in its condition “as is” as of the first day of the Second Amendment Additional
Premises Term, and (b) Sublandlord shall have no obligation to alter, repair or otherwise prepare the Additional Premises for Subtenant’s occupancy for the Additional Premises Term or to pay for any improvements to the Additional Premises.

 19. Consent of Prime Lessor. Notwithstanding anything contained herein, the effectiveness of this Second Amendment is subject to
and conditioned upon the written approval hereof and consent hereto by Prime Lessor in substantially the same form as the Original Consent and the Consent to Amendment (the “Consent to Second Amendment”). This Second Amendment shall
not become effective unless and until the Consent to Second Amendment has been duly executed by each of Prime Lessor, Sublandlord and Subtenant (the “Second Amendment Consent Contingency”). Each of Sublandlord and Subtenant agrees
to execute and deliver the Consent to Second Amendment in the form provided by Prime Lessor and reasonably approved by Sublandlord and Subtenant. 

20. Effect of Amendment. Except as modified by this Second Amendment, the Existing Sublease and all the covenants, agreements, terms,
provisions and conditions thereof shall remain in full force and effect and are hereby ratified and affirmed as to both the Premises and the Additional Premises. In the event of any conflict between the terms contained in this Amendment and the
Existing Sublease, the terms herein contained shall supersede and control the obligations and liabilities of the parties. 
 21.
Successors and Assigns. Each of the covenants, conditions and agreements contained in this Amendment shall inure to the benefit of and shall apply to and be binding upon the parties hereto and their respective heirs, legatees, devisees,
executors, administrators and permitted successors and assigns and sublessees. Nothing in this section shall in any way alter the provisions of the Lease restricting assignment or subletting. 

22. Miscellaneous. This Amendment becomes effective only upon execution and delivery hereof by Sublandlord and Subtenant. The captions
of the paragraphs and subparagraphs in this Amendment are inserted and included solely for convenience and shall not be considered or given any effect in construing the provisions hereof. All exhibits hereto are incorporated herein by reference.
Submission of this instrument for examination or signature by Subtenant does not constitute a reservation of or option for a lease, and shall not be effective as a lease, lease amendment or otherwise until execution by and delivery to both
Sublandlord and Subtenant. 
 23. Authority. Subtenant guarantees, warrants and represents that the individual or individuals signing
this Amendment have the power, authority and legal capacity to sign this Amendment on behalf of and to bind all entities, corporations, partnerships, limited liability companies, joint venturers or other organizations and entities on whose behalf
such individual or individuals have signed. 

  
 4 

 24. Brokerage. Subtenant and Sublandlord represent that they have not dealt with any
broker in connection with this Second Amendment. Each party agrees to indemnify and hold harmless the other from and against any and all liabilities, claims, suits, demands, judgments, costs, losses, interest and expenses (including, without being
limited to, reasonable attorneys’ fees and expenses) which the indemnified party may be subject to or suffer by reason of any claim made by any person, firm or corporation for any commission, expense or other compensation as a result of the
execution and delivery of this Sublease, which is based on alleged conversations or negotiations by said person, firm or corporation with the indemnifying party. 

25. Surrender. Subtenant expressly acknowledges and agrees that it is required to comply with all of the provisions of
Section 28 of the Prime Lease (as incorporated in the Existing Sublease and this Amendment by reference) regarding surrender of the Additional Premises, including, without limitation, hiring of a certified industrial
hygienist to timely submit and perform a Decommissioning and HazMat Closure Plan with respect to the Additional Premises as described in said Section 28 of the Prime Lease. 

26. Counterparts; Facsimile and PDF Signatures. This Amendment may be executed in one or more counterparts, each of which, when taken
together, shall constitute one and the same document. A facsimile or portable document format (PDF) signature on this Amendment shall be equivalent to, and have the same force and effect as, an original signature. 

[REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK] 

  
 5 

 IN WITNESS WHEREOF, Sublandlord and Subtenant have executed this Amendment as a sealed
Massachusetts instrument as of the date and year first above written. 
  

			
	SUBLANDLORD:
	
	 FOGHORN THERAPEUTICS INC.,
 a
Delaware Corporation

		
	By:	 	 /s/ Fanny Cavalié

	Name:	 	Fanny Cavalié
	Title:	 	SVP, Head of Business & Operations
	
	SUBTENANT:
	
	 VERVE THERAPEUTICS, INC.,
 a
Delaware corporation

		
	By:	 	 /s/ Andrew D. Ashe

	Name:	 	Andrew D. Ashe
	Title:	 	President & COO

 EXHIBIT A 

Additional Premises Plan 
 See
section in green

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