EX-4.2





 Exhibit 4.2 

CERTAIN CONFIDENTIAL PORTIONS OF THIS EXHIBIT HAVE BEEN OMITTED AND REPLACED WITH “[***]”. SUCH IDENTIFIED INFORMATION HAS BEEN
EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS (I) NOT MATERIAL AND (II) WOULD LIKELY CAUSE COMPETITIVE HARM TO THE COMPANY IF DISCLOSED. 

FOURTH AMENDED AND RESTATED 

INVESTORS’ RIGHTS AGREEMENT 












 CONFIDENTIAL 

TABLE OF CONTENTS 
  

									
	 	 	 	  	 	  	Page	 
	 1.
	 	 Definitions
	  	 	1	 
			
	 2.
	 	 Registration Rights
	  	 	5	 
		 	 2.1
	  	 Demand Registration
	  	 	5	 
		 	 2.2
	  	 Company Registration
	  	 	7	 
		 	 2.3
	  	 Underwriting Requirements
	  	 	7	 
		 	 2.4
	  	 Obligations of the Company
	  	 	9	 
		 	 2.5
	  	 Furnish Information
	  	 	10	 
		 	 2.6
	  	 Expenses of Registration
	  	 	11	 
		 	 2.7
	  	 Delay of Registration
	  	 	11	 
		 	 2.8
	  	 Indemnification
	  	 	11	 
		 	 2.9
	  	 Reports Under Exchange Act
	  	 	13	 
		 	 2.10
	  	 Limitations on Subsequent Registration Rights
	  	 	14	 
		 	 2.11
	  	 “Market Stand-off” Agreement
	  	 	14	 
		 	 2.12
	  	 Restrictions on Transfer
	  	 	15	 
		 	 2.13
	  	 Termination of Registration Rights
	  	 	16	 
			
	 3.
	 	 Information Rights
	  	 	17	 
		 	 3.1
	  	 Delivery of Financial Statements
	  	 	17	 
		 	 3.2
	  	 Inspection
	  	 	18	 
		 	 3.3
	  	 Termination of Information Rights
	  	 	18	 
		 	 3.4
	  	 Confidentiality
	  	 	19	 
			
	 4.
	 	 Rights to Future Stock Issuances
	  	 	19	 
		 	 4.1
	  	 Right of First Offer
	  	 	19	 
		 	 4.2
	  	 Termination
	  	 	20	 
			
	 5.
	 	 Additional Covenants
	  	 	21	 
		 	 5.1
	  	 Insurance
	  	 	21	 
		 	 5.2
	  	 Employee Agreements
	  	 	21	 
		 	 5.3
	  	 Employee Stock Plan; Employee Stock
	  	 	21	 
		 	 5.4
	  	 Board Matters
	  	 	21	 
		 	 5.5
	  	 Successor Indemnification
	  	 	21	 
		 	 5.6
	  	 Indemnification Matters
	  	 	22	 
		 	 5.7
	  	 Right to Conduct Activities.
	  	 	22	 
		 	 5.8
	  	 CFIUS Filing Event
	  	 	23	 
		 	 5.9
	  	 Termination of Covenants
	  	 	23	 
			
	 6.
	 	 Miscellaneous
	  	 	23	 
		 	 6.1
	  	 Successors and Assigns
	  	 	23	 
		 	 6.2
	  	 Governing Law
	  	 	24	 
		 	 6.3
	  	 Counterparts
	  	 	24	 


  
 i 














 CONFIDENTIAL 
  


									
	         
	 	 6.4
	  	 Titles and Subtitles
	  	 	24	 
		 	 6.5
	  	 Notices
	  	 	24	 
		 	 6.6
	  	 Amendments and Waivers
	  	 	25	 
		 	 6.7
	  	 Severability
	  	 	26	 
		 	 6.8
	  	 Aggregation of Stock
	  	 	26	 
		 	 6.9
	  	 Additional Investors
	  	 	26	 
		 	 6.10
	  	 Entire Agreement
	  	 	26	 
		 	 6.11
	  	 Dispute Resolution
	  	 	26	 
		 	 6.12
	  	 Delays or Omissions
	  	 	27	 
		 	 6.13
	  	 Publicity
	  	 	27	 

  

					
	Schedule A	  	-	  	Schedule of Investors
	Schedule B	  	-	  	Schedule of Key Holders


  
 ii 














 CONFIDENTIAL 
  

 FOURTH AMENDED AND RESTATED 

INVESTORS’ RIGHTS AGREEMENT 

THIS FOURTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT (this “Agreement”), is made as of the 18th day of December,
2020, by and among Ikena Oncology, Inc., a Delaware corporation (the “Company”), each of the investors listed on Schedule A hereto (the “Investors”) and each of the stockholders listed on Schedule B
hereto, each of whom is referred to herein as a “Key Holder”. 
 RECITALS 

WHEREAS, the Company, certain of the Investors and the Key Holders entered into that certain Third Amended and Restated Investors’
Rights Agreement dated as of October 1, 2020 (the “Prior Agreement”); 
 WHEREAS, the Company and certain
Investors are parties to that Series B Preferred Stock Purchase Agreement, of even date herewith (the “Series B Purchase Agreement”), pursuant to which such Investors have agreed to purchase shares of the Company’s Series B
Preferred Stock (as defined below); 
 WHEREAS, the Key Holders and the Company desire to further induce such Investors to purchase
Series B Preferred Stock; 
 WHEREAS, the Investors and the Company hereby agree that this Agreement shall govern the rights of the
Investors to cause the Company to register shares of Common Stock issuable to the Investors, to receive certain information from the Company, and to participate in future equity offerings by the Company, and shall govern certain other matters as set
forth in this Agreement; and 
 WHEREAS, the Company and certain stockholders representing the Required Holders (as defined in the
Prior Agreement) desire that the Prior Agreement be amended and restated as set forth herein. 
 NOW, THEREFORE, in consideration of
the mutual promises and obligations contained herein, the parties hereby agree to amend and restate the Prior Agreement as follows: 
 1.
Definitions. For purposes of this Agreement: 
 1.1 “Affiliate” means, with respect to any specified Person,
any other Person who, directly or indirectly, controls, is controlled by, or is under common control with such Person, including, without limitation, any general partner, managing partner, member, manager, officer or director of such Person or any
venture capital fund or other investment fund now or hereafter existing that is controlled by one or more general partners or managing members, or shares the same management company or investment adviser with, such Person. 

1.2 “Celgene” means Celgene Corporation. 

  
 1. 














 CONFIDENTIAL 
  

 1.3 “Certificate of Incorporation” means the Fourth Amended and Restated
Certificate of Incorporation of the Company, as amended and/or restated from time to time. 
 1.4 “Common Stock” means
shares of the Company’s common stock, par value $0.001 per share. 
 1.5 “Competitor” means a Person engaged, directly
or indirectly (including through any partnership, limited liability company, corporation, joint venture or similar arrangement (whether now existing or formed hereafter)), in any business or enterprise that is competitive with the
Company’s business; provided, however, the term “Competitor” shall not include (i) as of the date of this Agreement and subject to the last sentence of this definition, Celgene, and (ii) any financial investment firm
or collective investment vehicle (including any venture capital fund or other investment fund). For purposes of clarity, if Celgene or a financial investment firm or collective investment vehicle (including any venture capital fund or other
investment fund) owns a portfolio company (or an interest in a portfolio company) that is competitive with the Company’s business, Celgene or such financial investment firm or collective investment vehicle (including any venture capital fund or
other investment fund) shall not be deemed to be a “Competitor” but such portfolio company shall be deemed to be a “Competitor”. Subject to the foregoing sentence, the Board of Directors of the Company (the “Board of
Directors”) may make a unanimous determination (in good faith) that Celgene should be deemed a Competitor at any future time if Celgene or any Affiliate thereof engages in any competitive activities including, but not limited
to research, development or commercialization of products that bind or modulate the targets to which the products the Company is researching, developing or commercializing bind or modulate. 

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

1.7 “Derivative Securities” means any securities or rights convertible into, or exercisable or exchangeable for (in each case,
directly or indirectly), Common Stock, including options and warrants. 
 1.8 “Exchange Act” means the Securities Exchange
Act of 1934, as amended, and the rules and regulations promulgated thereunder. 

  
 2. 














 CONFIDENTIAL 
  

 1.9 “Excluded Registration” means (i) a registration relating to the
sale of securities to employees of the Company or a subsidiary pursuant to a stock option, stock purchase, or similar plan; (ii) a registration relating to an SEC Rule 145 transaction; (iii) a registration on any form that does not include
substantially the same information as would be required to be included in a registration statement covering the sale of the Registrable Securities; or (iv) a registration in which the only Common Stock being registered is Common Stock issuable
upon conversion of debt securities that are also being registered. 
 1.10 “Fidelity Investors” means the Investors advised
or sub-advised by Fidelity Management & Research Company LLC or affiliated investment advisers. 

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

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

1.17 “Initiating Holders” means, collectively, Holders who properly initiate a registration request under this Agreement.

 1.18 “IPO” means the Company’s first underwritten public offering of its Common Stock under the Securities Act.


  
 3. 














 CONFIDENTIAL 
  

 1.19 “Key Holder Registrable Securities” means (i) any Common
Stock currently held or hereafter acquired by the Key Holders (including any shares of Common Stock issued to Key Holders pursuant to that certain Restricted Stock Agreement, dated as of the January 11, 2019 (the “AskAt RSA”)
by and between the Company and those persons affiliated with AskAt, Inc. or pursuant to other Restricted Stock Agreement by and between the Company and certain Key Holders); and (ii) any Common Stock issued as (or issuable upon the conversion
or exercise of any warrant, right, or other security that is issued as) a dividend or other distribution with respect to, or in exchange for or in replacement of, the shares referenced above; and excluding for purposes of Section 2 any shares
for which registration rights have terminated pursuant to Subsection 2.13 of this Agreement. 
 1.20 “Major Investor” means
any Investor that, individually or together with such Investor’s Affiliates, holds at least 2,000,000 shares of Registrable Securities (as adjusted for any stock split, stock dividend, combination, or other recapitalization or reclassification
effected after the date hereof) and each Person to whom any of the right of any such Investor are assigned pursuant to Section 6.1 of this Agreement. 

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

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

 1.23 “Preferred Director” means any director of the Company that the holders of record of the Preferred
Stock are entitled to elect pursuant to the Company’s Certificate of Incorporation. 
 1.24 “Preferred Stock” means
the Series A Preferred Stock, the Series A-1 Preferred Stock, the Series A-2 Preferred Stock and the Series B Preferred Stock. 

1.25 “Registrable Securities” means (i) the Common Stock issuable or issued upon conversion of Preferred Stock;
(ii) any Common Stock, or any Common Stock issued or issuable (directly or indirectly) upon conversion and/or exercise of any other securities of the Company, acquired by the Investors after the date
hereof; (iii) the Key Holder Registrable Securities, provided, however, that such Key Holder Registrable Securities shall not be deemed Registrable Securities and the Key Holders shall not be deemed Holders for the purposes
of Subsections 2.10, 3.1, 3.2, 4.1 and 6.6; and (iv) any Common Stock issued as (or issuable upon the conversion or exercise of any warrant, right, or other security that is issued as) a dividend or
other distribution with respect to, or in exchange for or in replacement of, the shares referenced in clauses (i) and (ii) above; excluding in all cases, however, any Registrable Securities sold by a Person in a transaction in
which the applicable rights under this Agreement are not assigned pursuant to Subsection 6.1, and excluding for purposes of Section 2 any shares for which registration rights have terminated pursuant to Subsection
2.13 of this Agreement. 
 1.26 “Registrable Securities then outstanding” means the number of shares determined
by adding the number of shares of outstanding Common Stock that are Registrable Securities and the number of shares of Common Stock issuable (directly or indirectly) pursuant to then exercisable and/or convertible securities that are
Registrable Securities. 

  
 4. 














 CONFIDENTIAL 
  

 1.27 “Restricted Securities” means the securities of the Company required
to be notated with the legend set forth in Subsection 2.12(b) hereof. 
 1.28 “SEC” means the Securities and
Exchange Commission. 
 1.29 “SEC Rule 144” means Rule 144 promulgated by the SEC under the Securities Act. 

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

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

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

1.33 “Series A Preferred Stock” means shares of the Company’s Series A Preferred Stock, par value $0.001 per share. 

1.34 “Series A-1 Preferred Stock” means shares of the Company’s Series A-1 Preferred Stock, par value $0.001 per share. 
 1.35 “Series
A-2 Preferred Stock” means shares of the Company’s Series A-2 Preferred Stock, par value $0.001 per share. 

1.36 “Series B Preferred Stock” means shares of the Company’s Series B Preferred Stock, par value $0.001 per share. 

2. Registration Rights. The Company covenants and agrees as follows: 

2.1 Demand Registration. 

(a) Form S-1 Demand. If at any time after one hundred eighty (180) days after the
effective date of the registration statement for the IPO, the Company receives a request from Holders of at least forty percent (40%) of the Registrable Securities then outstanding (excluding any Key Holder Registrable Securities) that the Company
file a Form S-1 registration statement with respect to at least twenty percent (20%) of the Registrable Securities then outstanding (or a lesser percent if the anticipated aggregate offering price, net
of Selling Expenses, would exceed $10 million), then the Company shall (x) within ten (10) days after the date such request is given, give notice thereof (the “Demand Notice”) to all Holders other than the Initiating
Holders; and (y) as soon as practicable, and in any event within sixty (60) days after the date such request is given by the Initiating Holders, file a Form S-1 registration statement under the
Securities Act covering all Registrable Securities that the Initiating Holders requested to be registered and any additional Registrable Securities requested to be included in such registration by any other Holders, as specified by notice
given by each such Holder to the Company within twenty (20) days of the date the Demand Notice is given, and in each case, subject to the limitations of Subsections 2.1(c) and 2.3. 

  
 5. 














 CONFIDENTIAL 
  

 (b) Form S-3 Demand. If at any time when it
is eligible to use a Form S-3 registration statement, the Company receives a request from Holders of at least twenty percent (20%) of the Registrable Securities then outstanding (excluding any Key Holder
Registrable Securities) that the Company file a Form S-3 registration statement with respect to outstanding Registrable Securities of such Holders having an anticipated aggregate offering price, net of Selling
Expenses, of at least $3 million, then the Company shall (i) within ten (10) days after the date such request is given, give a Demand Notice to all Holders other than the Initiating Holders; and (ii) as soon as practicable, and
in any event within forty-five (45) days after the date such request is given by the Initiating Holders, file a Form S-3 registration statement under the Securities Act covering all Registrable Securities
requested to be included in such registration by any other Holders, as specified by notice given by each such Holder to the Company within twenty (20) days of the date the Demand Notice is given, and in each case, subject to the limitations of
Subsections 2.1(c) and 2.3. 
 (c) Notwithstanding the foregoing obligations, if the Company furnishes to Holders requesting a
registration pursuant to this Subsection 2.1 a certificate signed by the Company’s chief executive officer stating that in the good faith judgment of the Company’s Board of Directors it would be materially detrimental to the Company
and its stockholders for such registration statement to either become effective or remain effective for as long as such registration statement otherwise would be required to remain effective, because such action would (i) materially interfere
with a significant acquisition, corporate reorganization, or other similar transaction involving the Company; (ii) require premature disclosure of material information that the Company has a bona fide business purpose for preserving as
confidential; or (iii) render the Company unable to comply with requirements under the Securities Act or Exchange Act, then the Company shall have the right to defer taking action with respect to such filing, and any time periods with respect
to filing or effectiveness thereof shall be tolled correspondingly, for a period of not more than ninety (90) days after the request of the Initiating Holders is given; provided, however, that the Company may not invoke this right
more than once in any twelve (12) month period; and provided further that the Company shall not register any securities for its own account or that of any other stockholder during such ninety (90) day period other than an
Excluded Registration. 
 (d) The Company shall not be obligated to effect, or to take any action to effect, any registration pursuant to
Subsection 2.1(a), (i) during the period that is sixty (60) days before the Company’s good faith estimate of the date of filing of, and ending on a date that is one hundred eighty (180) days after the effective date of,
a Company-initiated registration, provided that the Company is actively employing in good faith commercially reasonable efforts to cause such registration statement to become effective; (ii) after the Company has effected two
(2) registrations pursuant to Subsection 2.1(a); or (iii) if the Initiating Holders propose to dispose of shares of Registrable Securities that may be immediately registered on Form S-3
pursuant to a request made pursuant to Subsection 2.1(b). The Company shall not be obligated to effect, or to take any action to effect, any registration pursuant to Subsection 2.1(b) (i) during the period that is thirty
(30) days before the Company’s good faith estimate of the date of filing of, and ending on a date that is ninety (90) days after the effective date of, a Company-initiated registration, provided that the Company is actively
employing in good faith commercially reasonable efforts to cause such registration statement to become effective; or (ii) if the Company has effected two registrations pursuant to Subsection 2.1(b) within the twelve
(12) month period immediately preceding the date of such request. A registration shall not be counted as “effected” for purposes of this Subsection 2.1(d) until such time as the applicable registration statement has been
declared effective by the SEC, unless the Initiating Holders withdraw their request for such registration, elect not to pay the registration expenses therefor, and forfeit their right to one demand registration statement pursuant to Subsection
2.6, in which case such withdrawn registration statement shall be counted as “effected” for purposes of this Subsection 2.1(d). 

  
 6. 














 CONFIDENTIAL 
  

 2.2 Company Registration. If the Company proposes to register (including, for this
purpose, a registration effected by the Company for stockholders other than the Holders) any of its Common Stock under the Securities Act in connection with the public offering of such securities solely for cash (other than in an Excluded
Registration), the Company shall, at such time, promptly give each Holder notice of such registration. Upon the request of each Holder given within twenty (20) days after such notice is given by the Company, the Company shall, subject to the
provisions of Subsection 2.3, cause to be registered all of the Registrable Securities that each such Holder has requested to be included in such registration. The Company shall have the right to terminate or withdraw any registration
initiated by it under this Subsection 2.2 before the effective date of such registration, whether or not any Holder has elected to include Registrable Securities in such registration. The expenses (other than Selling Expenses) of such
withdrawn registration shall be borne by the Company in accordance with Subsection 2.6. 
 2.3 Underwriting Requirements. 

(a) If, pursuant to Subsection 2.1, the Initiating Holders intend to distribute the Registrable Securities covered by their
request by means of an underwriting, they shall so advise the Company as a part of their request made pursuant to Subsection 2.1, and the Company shall include such information in the Demand Notice. The underwriter(s) will be selected by the
Company and shall be reasonably acceptable to a majority in interest of the Initiating Holders. In such event, the right of any Holder to include such Holder’s Registrable Securities in such registration shall be conditioned upon such
Holder’s participation in such underwriting and the inclusion of such Holder’s Registrable Securities in the underwriting to the extent provided herein. All Holders proposing to distribute their securities through such underwriting shall
(together with the Company as provided in Subsection 2.4(e)) enter into an underwriting agreement in customary form with the underwriter(s) selected for such underwriting. Notwithstanding any other provision of this Subsection 2.3, if
the managing underwriter(s) advise(s) the Initiating Holders in writing that marketing factors require a limitation on the number of shares to be underwritten, then the Initiating Holders shall so advise all Holders of Registrable Securities that
otherwise would be underwritten pursuant hereto, and the number of Registrable Securities that may be included in the underwriting shall be allocated among such Holders of Registrable Securities, including the Initiating Holders, in proportion (as
nearly as practicable) to the number of Registrable Securities owned by each Holder or in such other proportion as shall mutually be agreed to by all such selling Holders; provided, however, that (i) the number of Registrable
Securities held by the Holders to be included in such underwriting shall not be reduced unless all other securities are first entirely excluded from the underwriting and (ii) any Registrable Securities which are not Key Holder Registrable
Securities shall not be excluded from such underwriting unless all Key Holder Registrable Securities are first excluded from such offering. To facilitate the allocation of shares in accordance with the above provisions, the Company or the
underwriters may round the number of shares allocated to any Holder to the nearest one hundred (100) shares. 

  
 7. 














 CONFIDENTIAL 
  

 (b) In connection with any offering involving an underwriting of shares of the
Company’s capital stock pursuant to Subsection 2.2, the Company shall not be required to include any of the Holders’ Registrable Securities in such underwriting unless the Holders accept the terms of the underwriting as agreed upon
between the Company and its underwriters, and then only in such quantity as the underwriters in their sole discretion determine will not jeopardize the success of the offering by the Company. If the total number of securities, including Registrable
Securities, requested by stockholders to be included in such offering exceeds the number of securities to be sold (other than by the Company) that the underwriters in their reasonable discretion determine is compatible with the success of the
offering, then the Company shall be required to include in the offering only that number of such securities, including Registrable Securities, which the underwriters and the Company in their sole discretion determine will not jeopardize the success
of the offering. If the underwriters determine that less than all of the Registrable Securities requested to be registered can be included in such offering, then the Registrable Securities that are included in such offering shall be allocated among
the selling Holders in proportion (as nearly as practicable to) the number of Registrable Securities owned by each selling Holder or in such other proportions as shall mutually be agreed to by all such selling Holders; provided,
however, that any Registrable Securities which are not Key Holder Registrable Securities shall not be excluded from such underwriting unless all Key Holder Registrable Securities are first excluded from such offering. To facilitate the
allocation of shares in accordance with the above provisions, the Company or the underwriters may round the number of shares allocated to any Holder to the nearest one hundred (100) shares. Notwithstanding the foregoing, in no event shall
(i) the number of Registrable Securities included in the offering be reduced unless all other securities (other than securities to be sold by the Company) are first entirely excluded from the offering, or (ii) the number of Registrable
Securities included in the offering be reduced below thirty percent (30%) of the total number of securities included in such offering, unless such offering is the IPO, in which case the selling Holders may be excluded further if the underwriters
make the determination described above and no other stockholder’s securities are included in such offering. For purposes of the provision in this Subsection 2.3(b) concerning apportionment, for any selling Holder that is a partnership,
limited liability company, or corporation, the partners, members, retired partners, retired members, stockholders, and Affiliates of such Holder, or the estates and Immediate Family Members of any such partners, retired partners, members, and
retired members and any trusts for the benefit of any of the foregoing Persons, shall be deemed to be a single “selling Holder,” and any pro rata reduction with respect to such “selling Holder” shall be based upon the aggregate
number of Registrable Securities owned by all Persons included in such “selling Holder,” as defined in this sentence. 

  
 8. 














 CONFIDENTIAL 
  

 (c) For purposes of Subsection 2.1, a registration shall not be counted as
“effected” if, as a result of an exercise of the underwriter’s cutback provisions in Subsection 2.3(a), fewer than fifty percent (50%) of the total number of Registrable Securities that Holders have requested to be included in
such registration statement are actually included. 
 2.4 Obligations of the Company. Whenever required under this
Section 2 to effect the registration of any Registrable Securities, the Company shall, as expeditiously as reasonably possible: 

(a) prepare and file with the SEC a registration statement with respect to such Registrable Securities and use its commercially reasonable
efforts to cause such registration statement to become effective and, upon the request of the Holders of a majority of the Registrable Securities registered thereunder, keep such registration statement effective for a period of up to one hundred
twenty (120) days or, if earlier, until the distribution contemplated in the registration statement has been completed; provided, however, that (i) such one hundred twenty (120) day period shall be extended for a period
of time equal to the period the Holder refrains, at the request of an underwriter of Common Stock (or other securities) of the Company, from selling any securities included in such registration, and (ii) in the case of any registration of
Registrable Securities on Form S-3 that are intended to be offered on a continuous or delayed basis, subject to compliance with applicable SEC rules, such one hundred twenty (120) day period shall be
extended for up to an additional one hundred twenty (120) days, if necessary, to keep the registration statement effective until all such Registrable Securities are sold; 

(b) prepare and file with the SEC such amendments and supplements to such registration statement, and the prospectus used in connection with
such registration statement, as may be necessary to comply with the Securities Act in order to enable the disposition of all securities covered by such registration statement; 

(c) furnish to the selling Holders such numbers of copies of a prospectus, including a preliminary prospectus, as required by the Securities
Act, and such other documents as the Holders may reasonably request in order to facilitate their disposition of their Registrable Securities; 

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

(e) in the event of any underwritten public offering, enter into and perform its obligations under an underwriting agreement, in usual and
customary form, with the underwriter(s) of such offering; 
 (f) use its commercially reasonable efforts to cause all such Registrable
Securities covered by such registration statement to be listed on a national securities exchange or trading system and each securities exchange and trading system (if any) on which similar securities issued by the Company are then listed; 

  
 9. 














 CONFIDENTIAL 
  

 (g) provide a transfer agent and registrar for all Registrable Securities registered
pursuant to this Agreement and provide a CUSIP number for all such Registrable Securities, in each case not later than the effective date of such registration; 

(h) promptly make available for inspection by the selling Holders, any managing underwriter(s) participating in any disposition pursuant to
such registration statement, and any attorney or accountant or other agent retained by any such underwriter or selected by the selling Holders, all financial and other records, pertinent corporate documents, and properties of the Company, and cause
the Company’s officers, directors, employees, and independent accountants to supply all information reasonably requested by any such seller, underwriter, attorney, accountant, or agent, in each case, as necessary or advisable to verify the
accuracy of the information in such registration statement and to conduct appropriate due diligence in connection therewith; 
 (i) notify
each selling Holder, promptly after the Company receives notice thereof, of the time when such registration statement has been declared effective or a supplement to any prospectus forming a part of such registration statement has been filed; and

 (j) after such registration statement becomes effective, notify each selling Holder of any request by the SEC that the Company amend or
supplement such registration statement or prospectus. 
 In addition, the Company shall ensure that, at all times after any registration
statement covering a public offering of securities of the Company under the Securities Act shall have become effective, its insider trading policy shall provide that the Company’s directors may implement a trading program under Rule 10b5-1 of the Exchange Act. 
 2.5 Furnish Information. It shall be a condition precedent to the
obligations of the Company to take any action pursuant to this Section 2 with respect to the Registrable Securities of any selling Holder that such Holder shall furnish to the Company such information regarding itself, the
Registrable Securities held by it, and the intended method of disposition of such securities as is reasonably required to effect the registration of such Holder’s Registrable Securities. 

  
 10. 














 CONFIDENTIAL 
  

 2.6 Expenses of Registration. All expenses (other than Selling Expenses) incurred in
connection with registrations, filings, or qualifications pursuant to Section 2, including all registration, filing, and qualification fees; printers’ and accounting fees; fees and disbursements of counsel for the
Company; and the reasonable fees and disbursements of one counsel for the selling Holders (“Selling Holder Counsel”), shall be borne and paid by the Company; provided, however, that the Company shall not be
required to pay for any expenses of any registration proceeding begun pursuant to Subsection 2.1 if the registration request is subsequently withdrawn at the request of the Initiating Holders (in which case all selling Holders shall bear such
expenses pro rata based upon the number of Registrable Securities that were to be included in the withdrawn registration), unless the Initiating Holders agree to forfeit their right to one registration pursuant to Subsections 2.1(a) or
2.1(b), as the case may be; provided further that if, at the time of such withdrawal, the Holders shall have learned of a material adverse change in the condition, business, or prospects of the Company from that known to the
Holders at the time of their request and have withdrawn the request with reasonable promptness after learning of such information, then the Holders shall not be required to pay any of such expenses and shall not forfeit their right to one
registration pursuant to Subsections 2.1(a) or 2.1(b). All Selling Expenses relating to Registrable Securities registered pursuant to this Section 2 shall be borne and paid by the Holders pro rata on the basis
of the number of Registrable Securities registered on their behalf. 
 2.7 Delay of Registration. No Holder shall have any right to
obtain or seek an injunction restraining or otherwise delaying any registration pursuant to this Agreement as the result of any controversy that might arise with respect to the interpretation or implementation of this
Section 2. 
 2.8 Indemnification. If any Registrable Securities are included in a registration statement
under this Section 2: 
 (a) To the extent permitted by law, the Company will indemnify and hold harmless each
selling Holder, and the partners, members, officers, directors, and stockholders of each such Holder; legal counsel, accountants and investment advisers for each such Holder; any underwriter (as defined in the Securities Act) for each such Holder;
and each Person, if any, who controls such Holder or underwriter within the meaning of the Securities Act or the Exchange Act, against any Damages, and the Company will pay to each such Holder, underwriter, controlling Person, or other
aforementioned Person any legal or other expenses reasonably incurred thereby in connection with investigating or defending any claim or proceeding from which Damages may result, as such expenses are incurred; provided, however, that
the indemnity agreement contained in this Subsection 2.8(a) shall not apply to amounts paid in settlement of any such claim or proceeding if such settlement is effected without the consent of the Company, which consent shall not be
unreasonably withheld, nor shall the Company be liable for any Damages to the extent that they arise out of or are based upon actions or omissions made in reliance upon and in conformity with written information furnished by or on behalf of any such
Holder, underwriter, controlling Person, or other aforementioned Person expressly for use in connection with such registration. 
 (b) To
the extent permitted by law, each selling Holder, severally and not jointly, will indemnify and hold harmless the Company, and each of its directors, each of its officers who has signed the registration statement, each Person (if any), who controls
the Company within the meaning of the Securities Act, legal counsel and accountants for the Company, any underwriter (as defined in the Securities Act), any other Holder selling securities in such registration statement, and any controlling Person
of any such underwriter or other Holder, against any Damages, in each case only to the extent that such Damages arise out of or are based upon actions or omissions made in reliance upon and in conformity with written information furnished by or on
behalf of such selling Holder expressly for use in connection with such registration; and each such selling Holder will pay to the Company and each other aforementioned Person any legal or other expenses reasonably incurred thereby in connection
with investigating or defending any claim or proceeding from which Damages may result, as such expenses are incurred; provided, however, that the indemnity agreement contained in this Subsection 2.8(b) shall not apply to
amounts paid in settlement of any such claim or proceeding if such settlement is effected without the consent of the Holder, which consent shall not be unreasonably withheld; and provided further that in no event shall the aggregate
amounts payable by any Holder by way of indemnity or contribution under Subsections 2.8(b) and 2.8(d) exceed the proceeds from the offering received by such Holder (net of any Selling Expenses paid by such Holder), except in the case
of fraud or willful misconduct by such Holder. 

  
 11. 














 CONFIDENTIAL 
  

 (c) Promptly after receipt by an indemnified party under this Subsection 2.8
of notice of the commencement of any action (including any governmental action) for which a party may be entitled to indemnification hereunder, such indemnified party will, if a claim in respect thereof is to be made against any indemnifying
party under this Subsection 2.8, give the indemnifying party notice of the commencement thereof. The indemnifying party shall have the right to participate in such action and, to the extent the indemnifying party so desires, participate
jointly with any other indemnifying party to which notice has been given, and to assume the defense thereof with counsel mutually satisfactory to the parties; provided, however, that an indemnified party (together with all other
indemnified parties that may be represented without conflict by one counsel) shall have the right to retain one separate counsel, with the fees and expenses to be paid by the indemnifying party, if representation of such indemnified party by the
counsel retained by the indemnifying party would be inappropriate due to actual or potential differing interests between such indemnified party and any other party represented by such counsel in such action. 

(d) To provide for just and equitable contribution to joint liability under the Securities Act in any case in which either: (i) any party
otherwise entitled to indemnification hereunder makes a claim for indemnification pursuant to this Subsection 2.8 but it is judicially determined (by the entry of a final judgment or decree by a court of competent jurisdiction and the
expiration of time to appeal or the denial of the last right of appeal) that such indemnification may not be enforced in such case, notwithstanding the fact that this Subsection 2.8 provides for indemnification in such case, or
(ii) contribution under the Securities Act may be required on the part of any party hereto for which indemnification is provided under this Subsection 2.8, then, and in each such case, such parties will contribute to the aggregate
losses, claims, damages, liabilities, or expenses to which they may be subject (after contribution from others) in such proportion as is appropriate to reflect the relative fault of each of the indemnifying party and the indemnified party in
connection with the statements, omissions, or other actions that resulted in such loss, claim, damage, liability, or expense, as well as to reflect any other relevant equitable considerations. The relative fault of the indemnifying party and of the
indemnified party shall be determined by reference to, among other things, whether the untrue or allegedly untrue statement of a material fact, or the omission or alleged omission of a material fact, relates to information supplied by the
indemnifying party or by the indemnified party and the parties’ relative intent, knowledge, access to information, and opportunity to correct or prevent such statement or omission; provided, however, that, in any such case
(x) no Holder will be required to contribute any amount in excess of the public offering price of all such Registrable Securities offered and sold by such Holder pursuant to such registration statement, and (y) no Person guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) will be entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation; and provided further that in no
event shall a Holder’s liability pursuant to this Subsection 2.8(d), when combined with the amounts paid or payable by such Holder pursuant to Subsection 2.8(b), exceed the proceeds from the offering received by such Holder (net
of any Selling Expenses paid by such Holder), except in the case of willful misconduct or fraud by such Holder. 

  
 12. 














 CONFIDENTIAL 
  

 (e) Notwithstanding the foregoing, to the extent that the provisions on indemnification and
contribution contained in the underwriting agreement entered into in connection with the underwritten public offering are in conflict with the foregoing provisions, the provisions in the underwriting agreement shall control; provided,
however, that any matter expressly provided for or addressed by the foregoing provisions that is not expressly provided for or addressed by the underwriting agreement shall be controlled by the foregoing provisions. 

(f) Unless otherwise superseded by an underwriting agreement entered into in connection with the underwritten public offering, the obligations
of the Company and Holders under this Subsection 2.8 shall survive the completion of any offering of Registrable Securities in a registration under this Section 2, and otherwise shall survive the termination of this
Agreement. 
 2.9 Reports Under Exchange Act. With a view to making available to the Holders the benefits of SEC Rule 144 and any
other rule or regulation of the SEC that may at any time permit a Holder to sell securities of the Company to the public without registration or pursuant to a registration on Form S-3, the Company shall: 

(a) make and keep available adequate current public information, as those terms are understood and defined in SEC Rule 144, at all times after
the effective date of the registration statement filed by the Company for the IPO; 
 (b) use commercially reasonable efforts to file with
the SEC in a timely manner all reports and other documents required of the Company under the Securities Act and the Exchange Act (at any time after the Company has become subject to such reporting requirements); and 

(c) furnish to any Holder, so long as the Holder owns any Registrable Securities, forthwith upon request (i) to the extent accurate, a
written statement by the Company that it has complied with the reporting requirements of SEC Rule 144 (at any time after ninety (90) days after the effective date of the registration statement filed by the Company for the IPO), the Securities
Act, and the Exchange Act (at any time after the Company has become subject to such reporting requirements), or that it qualifies as a registrant whose securities may be resold pursuant to Form S-3 (at any
time after the Company so qualifies); and (ii) such other information as may be reasonably requested in availing any Holder of any rule or regulation of the SEC that permits the selling of any such securities without registration (at any time
after the Company has become subject to the reporting requirements under the Exchange Act) or pursuant to Form S-3 (at any time after the Company so qualifies to use such form). 

  
 13. 














 CONFIDENTIAL 
  

 2.10 Limitations on Subsequent Registration Rights. From and after the date of this
Agreement, the Company shall not, without the prior written consent of the Holders of a majority of the Registrable Securities then outstanding, enter into any agreement with any holder or prospective holder of any securities of the Company that
would (i) allow such holder or prospective holder to include such securities in any registration unless, under the terms of such agreement, such holder or prospective holder may include such securities in any such registration only to the
extent that the inclusion of such securities will not reduce the number of the Registrable Securities of the Holders that are included; or (ii) allow such holder or prospective holder to initiate a demand for registration of any securities held
by such holder or prospective holder. 
 2.11 “Market
Stand-off” Agreement. Each Holder hereby agrees that it will not, without the prior written consent of the managing underwriter, during the period commencing on the date of the
final prospectus relating to the IPO and ending on the date specified by the Company and the managing underwriter (such period not to exceed one hundred eighty (180) days), (i) lend; offer; pledge; sell; contract to sell; sell any option or
contract to purchase; purchase any option or contract to sell; grant any option, right, or warrant to purchase; or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable
or exchangeable (directly or indirectly) for Common Stock held by such Holder immediately prior to the IPO or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of
ownership of such securities, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of Common Stock or other securities, in cash, or otherwise. The foregoing provisions of this Subsection 2.11
shall apply only to the IPO, and shall not apply to the sale of any shares to an underwriter pursuant to an underwriting agreement, the sale of any shares purchased in connection with the IPO, transactions (including, without limitation, any
swap, hedge or similar agreement or arrangement) or announcements, in each case, relating to securities acquired in the IPO or securities acquired in open market or other transactions from and after the IPO or that otherwise do not involve or relate
to securities of the Company owned by a Holder prior to the IPO, or the transfer of any shares to any trust for the direct or indirect benefit of the Holder or the immediate family of the Holder, provided that the trustee of the trust agrees
to be bound in writing by the restrictions set forth herein, and provided further that any such transfer shall not involve a disposition for value, and shall be applicable to the Holders only if all officers, directors and stockholders
owning 1% or more of the Company’s outstanding Common Stock (after giving effect to conversion into Common Stock of all outstanding Preferred Stock) are subject to the same restrictions. The underwriters in connection with such registration are
intended third-party beneficiaries of this Subsection 2.11 and shall have the right, power and authority to enforce the provisions hereof as though they were a party hereto. Each Holder further agrees
to execute such agreements as may be reasonably requested by the underwriters in connection with such registration that are consistent with this Subsection 2.11 or that are necessary to give further effect thereto. In the event that the
Company or the managing underwriter waives or terminates any of the restrictions contained in this Subsection 2.11 or in a lock-up agreement with respect to the securities of any Holder, officer,
director or one-percent or greater stockholder of the Company (in any such case, the “Released Securities”), the restrictions contained in this Subsection 2.11 and in any lock-up agreements executed by the Holders shall be waived or terminated, as applicable, to the same extent and with respect to the same percentage of securities of each Holder as the percentage of Released
Securities represent with respect to the securities held by the applicable Holder, officer, director or one-percent or greater stockholder. 

  
 14. 














 CONFIDENTIAL 
  

 2.12 Restrictions on Transfer. 

(a) The Preferred Stock and the Registrable Securities shall not be sold, pledged, or otherwise transferred, and the Company shall not
recognize and shall issue stop-transfer instructions to its transfer agent with respect to any such sale, pledge, or transfer, except upon the conditions specified in this Agreement, which conditions are intended to ensure compliance with the
provisions of the Securities Act. A transferring Holder will cause any proposed purchaser, pledgee, or transferee of the Preferred Stock and the Registrable Securities held by such Holder to agree to take and hold such securities subject to the
provisions and upon the conditions specified in this Agreement. Notwithstanding the foregoing, the Company shall not require any transferee of shares pursuant to an effective registration statement or, following the IPO, SEC Rule 144 to be bound by
the terms of this Agreement. 
 (b) Each certificate, instrument, or book entry representing (i) the Preferred Stock, (ii) the
Registrable Securities, and (iii) any other securities issued in respect of the securities referenced in clauses (i) and (ii), upon any stock split, stock dividend, recapitalization, merger, consolidation, or similar event, shall (unless
otherwise permitted by the provisions of Subsection 2.12(c)) be notated with a legend substantially in the following form: 
 THE
SECURITIES REPRESENTED HEREBY HAVE BEEN ACQUIRED FOR INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. SUCH SHARES MAY NOT BE SOLD, PLEDGED, OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR A VALID EXEMPTION FROM THE
REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS OF SAID ACT. 
 THE SECURITIES REPRESENTED HEREBY MAY BE TRANSFERRED ONLY IN ACCORDANCE
WITH THE TERMS OF AN AGREEMENT BETWEEN THE COMPANY AND THE STOCKHOLDER, A COPY OF WHICH IS ON FILE WITH THE SECRETARY OF THE COMPANY. 
 The
Holders consent to the Company making a notation in its records and giving instructions to any transfer agent of the Restricted Securities in order to implement the restrictions on transfer set forth in this Subsection 2.12. 

  
 15. 














 CONFIDENTIAL 
  

 (c) The holder of such Restricted Securities, by acceptance of ownership thereof, agrees to
comply in all respects with the provisions of this Section 2. Before any proposed sale, pledge, or transfer of any Restricted Securities, unless there is in effect a registration statement under the Securities Act covering
the proposed transaction or, following the IPO, the transfer is made pursuant to SEC Rule 144, the Holder thereof shall give notice to the Company of such Holder’s intention to effect such sale, pledge, or transfer. Each such notice shall
describe the manner and circumstances of the proposed sale, pledge, or transfer in sufficient detail and, if reasonably requested by the Company, shall be accompanied at such Holder’s expense by either (i) a written opinion of legal
counsel who shall, and whose legal opinion shall, be reasonably satisfactory to the Company, addressed to the Company, to the effect that the proposed transaction may be effected without registration under the Securities Act; (ii) a “no
action” letter from the SEC to the effect that the proposed sale, pledge, or transfer of such Restricted Securities without registration will not result in a recommendation by the staff of the SEC that action be taken with respect thereto; or
(iii) any other evidence reasonably satisfactory to counsel to the Company to the effect that the proposed sale, pledge, or transfer of the Restricted Securities may be effected without registration under the Securities Act, whereupon the
Holder of such Restricted Securities shall be entitled to sell, pledge, or transfer such Restricted Securities in accordance with the terms of the notice given by the Holder to the Company. The Company will not require such a legal opinion or
“no action” letter (x) in any transaction in compliance with SEC Rule 144; or (y) in any transaction in which such Holder distributes Restricted Securities to an Affiliate of such Holder for no consideration or (z) in any
internal transaction in which such Holder transfers Restricted Securities to an Affiliate of such Holder that is an entity and that is ultimately controlled by the same parent company as the Holder (or is the ultimate parent company of the Holder);
provided that, in the case of clauses (y) and (z); other than in connection with a transaction in compliance with SEC Rule 144 following the IPO, each transferee agrees in writing to be subject to the terms of this Subsection
2.12. Notwithstanding the foregoing, the Company shall be obligated to reissue promptly unlegended certificates or book entries at the request of any Holder thereof if the Company has completed its IPO and the Holder shall have obtained an
opinion of counsel (which counsel may be counsel to the Company) to the effect that the securities proposed to be disposed of may lawfully be so disposed of without registration, qualification and legend, provided that the second legend listed above
shall be removed only at such time as the Holder of such certificate is no longer subject to any restrictions hereunder. Each certificate, instrument, or book entry representing the Restricted Securities transferred as above provided shall be
notated with, except if such transfer is made pursuant to SEC Rule 144 or pursuant to an effective registration statement, the appropriate restrictive legend set forth in Subsection 2.12(b), except that such certificate instrument, or book
entry shall not be notated with such restrictive legend if, in the opinion of counsel for such Holder and the Company, such legend is not required in order to establish compliance with any provisions of the Securities Act. 

2.13 Termination of Registration Rights. The right of any Holder to request registration or inclusion of Registrable Securities in any
registration pursuant to Subsections 2.1 or 2.2 shall terminate upon the earliest to occur of: 
 (a) the closing of a Deemed
Liquidation Event (as defined in the Company’s Certificate of Incorporation); 
 (b) such time following the IPO as SEC Rule 144 or
another similar exemption under the Securities Act is available for the sale of all of such Holder’s shares without limitation during a three-month period without registration; and 

(c) the fifth anniversary of the IPO. 

  
 16. 














 CONFIDENTIAL 
  

 3. Information Rights. 

3.1 Delivery of Financial Statements. The Company shall deliver to each Major Investor: 

(a) as soon as practicable, but in any event within one hundred twenty (120) days after the end of each fiscal year of the Company,
(i) a balance sheet as of the end of such year, (ii) statements of income and of cash flows for such year, and a comparison between (x) the actual amounts as of and for such fiscal year and (y) the comparable amounts for the
prior year and as included in the Budget (as defined in Subsection 3.1(e)) for such year, with an explanation of any material differences between such amounts and a schedule as to the sources and applications of funds for such year, and
(iii) a statement of stockholders’ equity as of the end of such year, all such financial statements audited and certified by independent public accountants of nationally recognized standing selected by the Company; 

(b) as soon as practicable, but in any event within forty-five (45) days after the end of each of
the first three (3) quarters of each fiscal year of the Company, unaudited statements of income and cash flows for such fiscal quarter, and an unaudited balance sheet and a statement of stockholders’ equity as of the end of such fiscal
quarter, all prepared in accordance with GAAP (except that such financial statements may (i) be subject to normal year-end audit adjustments; and (ii) not contain all notes thereto that may be
required in accordance with GAAP); 
 (c) as soon as practicable, but in any event within forty-five (45) days after the end of each
quarter of each fiscal year of the Company, a statement showing the number of shares of each class and series of capital stock and securities convertible into or exercisable for shares of capital stock outstanding at the end of the period, the
Common Stock issuable upon conversion or exercise of any outstanding securities convertible or exercisable for Common Stock and the exchange ratio or exercise price applicable thereto, and the number of shares of issued stock options and stock
options not yet issued but reserved for issuance, if any, all in sufficient detail as to permit the Major Investors to calculate their respective percentage equity ownership in the Company, and certified by the chief financial officer or chief
executive officer of the Company as being true, complete, and correct; 
 (d) as soon as practicable, but in any event within thirty
(30) days of the end of each month, an unaudited income statement and statement of cash flows for such month, and an unaudited balance sheet and statement of stockholders’ equity as of the end of such month, all prepared in accordance with
GAAP (except that such financial statements may (i) be subject to normal year-end audit adjustments and (ii) not contain all notes thereto that may be required in accordance with GAAP); 

(e) as soon as practicable, but in any event thirty (30) days before the end of each fiscal year, a budget and business plan for the next
fiscal year (collectively, the “Budget”), approved by the Board of Directors and prepared on a monthly basis, including balance sheets, income statements, and statements of cash flow for such months and, promptly after prepared, any
other budgets or revised budgets prepared by the Company; and 

  
 17. 














 CONFIDENTIAL 
  

 (f) such other information relating to the financial condition, business, prospects, or
corporate affairs of the Company as any Major Investor may from time to time reasonably request; provided, however, that the Company shall not be obligated under this Subsection 3.1 to provide information (i) that the
Company reasonably determines in good faith to be a trade secret or confidential information (unless covered by an enforceable confidentiality agreement, in a form acceptable to the Company); (ii) that the Company reasonably determines in good faith
would give rise to a conflict of interest between the Company, on the one hand, and such Major Investor, on the other hand; or (iii) the disclosure of which would adversely affect the attorney-client privilege between the Company and its
counsel. 
 If, for any period, the Company has any subsidiary whose accounts are consolidated with those of the Company, then in respect of
such period the financial statements delivered pursuant to the foregoing sections shall be the consolidated and consolidating financial statements of the Company and all such consolidated subsidiaries.

Notwithstanding anything else in this Subsection 3.1 to the contrary, the Company may cease providing the information set forth in this
Subsection 3.1 during the period starting with the date forty-five (45) days before the Company’s good-faith estimate of the date of filing of a registration statement if it reasonably concludes it must do so to comply with the SEC
rules applicable to such registration statement and related offering; provided that the Company’s covenants under this Subsection 3.1 shall be reinstated at such time as the Company is no longer actively employing its commercially
reasonable efforts to cause such registration statement to become effective. 
 3.2 Inspection. The Company shall permit each Major
Investor at such Major Investor’s expense, to visit and inspect the Company’s properties; examine its books of account and records; and discuss the Company’s affairs, finances, and accounts with its officers, during normal business
hours of the Company as may be reasonably requested by the Major Investor; provided, however, that the Company shall not be obligated pursuant to this Subsection 3.2 to provide access to any information that it reasonably and in
good faith considers to be a trade secret or confidential information (unless covered by an enforceable confidentiality agreement, in form acceptable to the Company), would give rise to a conflict of interest between the Company, on the one hand,
and such Major Investor, on the other hand, or the disclosure of which would adversely affect the attorney-client privilege between the Company and its counsel. 

3.3 Termination of Information Rights. The covenants set forth in Subsection 3.1 and Subsection 3.2 shall terminate and
be of no further force or effect (i) immediately before the consummation of the IPO, (ii) when the Company first becomes subject to the periodic reporting requirements of Section 12(g) or 15(d) of the Exchange Act, or
(iii) upon a Deemed Liquidation Event (as defined in the Company’s Certificate of Incorporation), whichever event occurs first. 

  
 18. 














 CONFIDENTIAL 
  

 3.4 Confidentiality. Each Investor agrees that such Investor will keep confidential
and will not disclose, divulge, or use for any purpose (other than to monitor its investment in the Company) any confidential information obtained from the Company pursuant to the terms of this Agreement (including notice of the Company’s
intention to file a registration statement), unless such confidential information (a) is known or becomes known to the public in general (other than as a result of a breach of this Subsection 3.4 by such Investor), (b) is or has been
independently developed or conceived by such Investor without use of the Company’s confidential information, or (c) is or has been made known or disclosed to such Investor by a third party without a breach of any obligation of
confidentiality such third party may have to the Company; provided, however, that an Investor may disclose confidential information (i) to its attorneys, accountants, consultants, and other professionals to the extent necessary to
obtain their services in connection with monitoring its investment in the Company; (ii) to any prospective purchaser of any Registrable Securities from such Investor, if such prospective purchaser agrees to be bound by the provisions of this
Subsection 3.4; (iii) to any existing or prospective Affiliate, partner, member, stockholder, or wholly owned subsidiary of such Investor in the ordinary course of business, provided that such Investor informs such Person that
such information is confidential and directs such Person to maintain the confidentiality of such information and, in the case of any such prospective Person of the type identified in this clause (iii), such prospective Person has agreed in writing
to maintain the confidentiality of information received from such Investor; (iv) to the extent required in connection with any routine or periodic examination or similar process by any regulatory or self-regulatory body or authority not
specifically directed at the Company or the confidential information obtained from the Company pursuant to the terms of the Agreement, including, without limitation, quarterly or annual reports or other filings required by national securities
exchanges; or (v) as may otherwise be required by law, provided that, with respect to this clause (v), the Investor promptly notifies the Company of any such required disclosures and takes reasonable steps to minimize the extent of any
such required disclosures, in each case with respect to any such required disclosures that are specifically targeted at the information regarding the Company. 

4. Rights to Future Stock Issuances. 

4.1 Right of First Offer. Subject to the terms and conditions of this Subsection 4.1 and applicable securities laws, if the
Company proposes to offer or sell any New Securities, the Company shall first offer such New Securities to each Major Investor. A Major Investor shall be entitled to apportion the right of first offer hereby granted to it, in such proportions as it
deems appropriate, among (i) itself, (ii) its Affiliates and (iii) its beneficial interest holders, such as limited partners, members or any other Person having “beneficial ownership,” as such term is defined in Rule 13d-3 promulgated under the Exchange Act, of such Major Investor (“Investor Beneficial Owners”); provided that each such Affiliate or Investor Beneficial Owner (x) is not a
Competitor or FOIA Party, unless such party’s purchase of New Securities is otherwise consented to by the Board of Directors and (y) agrees to enter into this Agreement and each of the Fourth Amended and Restated Voting Agreement (the
“Voting Agreement”) and the Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement of even date herewith among the Company, the Investors and the other parties named therein,
as an “Investor” under each such agreement. 
 (a) The Company shall give notice (the “Offer Notice”) to
each Major Investor, stating (i) its bona fide intention to offer such New Securities, (ii) the number of such New Securities to be offered, and (iii) the price and terms, if any, upon which it proposes to offer such New Securities.


  
 19. 














 CONFIDENTIAL 
  

 (b) By notification to the Company within twenty (20) days after the Offer Notice is
given, each Major Investor may elect to purchase or otherwise acquire, at the price and on the terms specified in the Offer Notice, up to that portion of such New Securities which equals the proportion that the Common Stock then held by such Major
Investor (including all shares of Common Stock then issuable (directly or indirectly) upon conversion and/or exercise, as applicable, of the Preferred Stock and any other Derivative Securities then held by such Major Investor) bears to the total
Common Stock of the Company then held by all the Investors (including all shares of Common Stock issuable (directly or indirectly) upon conversion and/or exercise, as applicable, of the Preferred Stock and any other Derivative Securities then
held by the Investors). At the expiration of such twenty (20) day period, the Company shall promptly notify each Major Investor that elects to purchase or acquire all the shares available to it (each, a “Fully Exercising
Investor”) of any other Major Investor’s failure to do likewise. During the ten (10) day period commencing after the Company has given such notice, each Fully Exercising Investor may, by giving notice to the Company, elect to
purchase or acquire, in addition to the number of shares specified above, up to that portion of the New Securities for which Major Investors were entitled to subscribe but that were not subscribed for by the Major Investors which is equal to the
proportion that the Common Stock issued and held, or issuable (directly or indirectly) upon conversion and/or exercise, as applicable, of Preferred Stock and any other Derivative Securities then held, by such Fully Exercising Investor bears to the
Common Stock issued and held, or issuable (directly or indirectly) upon conversion and/or exercise, as applicable, of the Preferred Stock and any other Derivative Securities then held, by all Fully Exercising Investors who wish to purchase
such unsubscribed shares. The closing of any sale pursuant to this Subsection 4.1(b) shall occur within the later of ninety (90) days of the date that the Offer Notice is given and the date of initial sale of New Securities pursuant to
Subsection 4.1(c). 
 (c) If all New Securities referred to in the Offer Notice are not elected to be purchased or acquired as
provided in Subsection 4.1(b), the Company may, during the ninety (90) day period following the expiration of the periods provided in Subsection 4.1(b), offer and sell the remaining unsubscribed portion of such New Securities to
any Person or Persons at a price not less than, and upon terms no more favorable to the offeree than, those specified in the Offer Notice. If the Company does not enter into an agreement for the sale of the New Securities within such period, or if
such agreement is not consummated within thirty (30) days of the execution thereof, the right provided hereunder shall be deemed to be revived and such New Securities shall not be offered unless first reoffered to the Major Investors in
accordance with this Subsection 4.1. 
 (d) The right of first offer in this Subsection 4.1 shall not be applicable to
(i) Exempted Securities (as defined in the Company’s Certificate of Incorporation), (ii) shares of Common Stock issued in the IPO, and (iii) the issuance of shares of Series B Preferred Stock pursuant to the Series B Purchase
Agreement. 
 4.2 Termination. The covenants set forth in Subsection 4.1 shall terminate and be of no further force or effect
(i) immediately before the consummation of the IPO or (ii) upon a Deemed Liquidation Event (as defined in the Company’s Certificate of Incorporation), whichever event occurs first. 

  
 20. 














 CONFIDENTIAL 
  

 5. Additional Covenants. 

5.1 Insurance. The Company has obtained from financially sound and reputable insurers Directors and Officers liability insurance in an
amount and on terms and conditions satisfactory to the Board of Directors, and will use commercially reasonable efforts to cause such insurance policies to be maintained until such time as the Board of Directors determines that such insurance should
be discontinued. The Directors and Officers liability insurance policy shall not be cancelable by the Company without prior approval by the Board of Directors (including all of the Preferred Directors). Notwithstanding any other provision of this
Section 5.1 to the contrary, for so long as a Preferred Director is serving on the Board of Directors, the Company shall not cease to maintain a Directors and Officers liability insurance policy in an amount of at least
five million dollars ($5,000,000) unless approved by all of the Preferred Directors. 
 5.2 Employee Agreements. The Company will
cause each person now or hereafter employed by it or by any subsidiary (or engaged by the Company or any subsidiary as a consultant/independent contractor) with access to confidential information and/or trade secrets to enter into a nondisclosure
and proprietary rights assignment agreement. 
 5.3 Employee Stock Plan; Employee Stock. Unless otherwise approved by
the Board of Directors (including a majority of the Preferred Directors), all future employees and consultants of the Company who purchase, receive options to purchase, or receive awards of shares of the Company’s capital stock after the date
hereof shall be required to execute restricted stock or option agreements, as applicable, providing for (a) vesting of shares over a four (4) year period, with the first twenty-five percent (25%) of such shares vesting following twelve
(12) months of continued employment or service, and the remaining shares vesting in equal monthly installments over the following thirty-six (36) months and (b) a market stand-off provision substantially similar to that in Subsection 2.11. In addition, unless otherwise approved by the Board of Directors (including all of the Preferred Directors), the Company shall
retain a “right of first refusal” on employee transfers until the Company’s IPO and shall have the right to repurchase unvested shares at cost upon termination of employment of a holder of restricted stock. 

5.4 Board Matters. Unless otherwise determined by the vote of a majority of the directors then in office, the Board of Directors shall
meet at least quarterly in accordance with an agreed-upon schedule. The Company shall reimburse the nonemployee directors for all reasonable out-of-pocket travel
expenses incurred (consistent with the Company’s travel policy) in connection with attending meetings of the Board of Directors. Each Preferred Director shall be entitled in such person’s discretion to be a member of any committee of the
Board of Directors. 
 5.5 Successor Indemnification. If the Company or any of its successors or assignees consolidates with or
merges into any other Person and is not the continuing or surviving corporation or entity of such consolidation or merger, then to the extent necessary, proper provision shall be made so that the successors and assignees of the Company assume the
obligations of the Company with respect to indemnification of members of the Board of Directors as in effect immediately before such transaction, whether such obligations are contained in the Company’s Bylaws, its Certificate of Incorporation,
or elsewhere, as the case may be. 

  
 21. 














 CONFIDENTIAL 
  

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

5.7 Right to Conduct Activities. The Company hereby agrees and acknowledges that each of OrbiMed Private
Investments, VI, LP, Atlas Venture Fund X, L.P., Atlas Venture Fund XI, L.P., Atlas Venture Opportunity Fund I, L.P., Omega Fund VI, L.P., the Fidelity Investors, Invus Public Equities, L.P., Citadel Multi-Strategy Equities Master Fund Ltd.
(“Surveyor”), Zone II Healthcare Holdings, LLC, Cowen Healthcare Investments II LP, CHI EF II LP, Biotechnology Value Fund, L.P., Biotechnology Value Fund II, L.P., Biotechnology Value Trading Fund OS, L.P. and Celgene (together
with each of their respective Affiliates) (“Funds”) is a professional investment fund or makes professional investments, and as such invests in numerous portfolio companies, some of which may be deemed competitive with the
Company’s business (as currently conducted or as currently propose to be conducted). The Company hereby agrees that, to the extent permitted under applicable law, such Funds shall not be liable to the Company for any claim arising out of,
or based upon, (i) the investment by any of such Funds in any entity competitive with the Company, or (ii) actions taken by any partner, officer or other representative of such Funds to assist any such competitive company, whether or not
such action was taken as a member of the board of directors of such competitive company or otherwise, and whether or not such action has a detrimental effect on the Company; provided, however, that the foregoing shall not relieve (x) any of
such Funds from liability associated with the unauthorized disclosure of the Company’s confidential information obtained pursuant to this Agreement, or (y) any director or officer of the Company from any liability associated with his or
her fiduciary duties to the Company. The Company acknowledges that the execution of this Agreement and and the access to the Company’s confidential information shall in no way be construed to prohibit or restrict the Funds from maintaining,
making or considering investments in other companies, or from otherwise operating in the ordinary course of business. 

  
 22. 














 CONFIDENTIAL 
  

 5.8 CFIUS Filing Event. If and only if (i) the Committee on
Foreign Investment in the United States or any member agency thereof acting in its capacity as a member agency (“CFIUS”) requests or requires that the Company and an Investor to file a notice or declaration with CFIUS pursuant to
the Defense Production Act of 1950, as amended, including all implementing regulations thereof (the “DPA”), with respect to an Investor’s investment in the Company (the “Covered Transaction”), or (ii) the
Company or an Investor determine in good faith that a filing with CFIUS with respect to the Covered Transaction is advisable or required by applicable law, then in either case, (i) or (ii) (either to constitute a “CFIUS Filing
Event”) the Company and such Investor shall, and shall cause any Affiliates of such Investor to, cooperate and promptly make a CFIUS filing in the requested, required or advisable form in accordance with the DPA. This Subsection 5.8
shall only be applicable to Investors who are Foreign Persons or are managed or controlled by Foreign Persons. “Foreign Person” means a Person or government that is a “foreign person” within the meaning of the DPA. 

5.9 Termination of Covenants. The covenants set forth in this Section 5, except for Subsection
5.5, shall terminate and be of no further force or effect (i) immediately before the consummation of the IPO, (ii) when the Company first becomes subject to the periodic reporting requirements of Section 12(g) or 15(d) of
the Exchange Act, or (iii) upon a Deemed Liquidation Event, whichever event occurs first. 
 6. Miscellaneous. 

6.1 Successors and Assigns. The rights under this Agreement may be assigned (but only with all related obligations) by a Holder
to a transferee of Registrable Securities that (i) is an Affiliate of a Holder; (ii) is a Holder’s Immediate Family Member or trust for the benefit of an individual Holder or one or more of such Holder’s Immediate Family Members;
or (iii) after such transfer, holds at least 1,000,000 shares of Registrable Securities (subject to appropriate adjustment for stock splits, stock dividends, combinations, and other recapitalizations) or, if less, all of the Registarble
Securities held by such Holder; provided, however, that (x) the Company is, within a reasonable time after such transfer, furnished with written notice of the name and address of such transferee and the Registrable Securities with
respect to which such rights are being transferred; and (y) such transferee agrees in a written instrument delivered to the Company to be bound by and subject to the terms and conditions of this Agreement, including the provisions of
Subsection 2.11. For the purposes of determining the number of shares of Registrable Securities held by a transferee, the holdings of a transferee (1) that is an Affiliate or stockholder of a Holder; (2) who is a Holder’s
Immediate Family Member; or (3) that is a trust for the benefit of an individual Holder or such Holder’s Immediate Family Member shall be aggregated together and with those of the transferring Holder; provided further that
all transferees who would not qualify individually for assignment of rights shall have a single attorney-in-fact for the purpose of exercising any rights, receiving
notices, or taking any action under this Agreement. The terms and conditions of this Agreement inure to the benefit of and are binding upon the respective successors and permitted assignees of the parties. Nothing in this Agreement, express or
implied, is intended to confer upon any party other than the parties hereto or their respective successors and permitted assignees any rights, remedies, obligations or liabilities under or by reason of this Agreement, except as expressly provided
herein. 

  
 23. 














 CONFIDENTIAL 
  

 6.2 Governing Law. This Agreement shall be governed by the internal law of the State
of Delaware, without regard to any conflicts of laws principles that would require the application of laws of any other jurisdiction. 
 6.3
Counterparts. This Agreement may be executed in two (2) or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Counterparts may be delivered via facsimile,
electronic mail (including pdf or any electronic signature complying with the U.S. federal ESIGN Act of 2000, e.g., www.docusign.com) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly
delivered and be valid and effective for all purposes.  
 6.4 Titles and Subtitles. The titles and subtitles used in
this Agreement are for convenience only and are not to be considered in construing or interpreting this Agreement. 
 6.5 Notices.
All notices and other communications given or made pursuant to this Agreement shall be in writing and shall be deemed effectively given upon the earlier of actual receipt or (i) personal delivery to the party to be notified; (ii) when
sent, if sent by electronic mail or facsimile during the recipient’s normal business hours, and if not sent during normal business hours, then on the recipient’s next business day; (iii) five (5) days after having been sent by
registered or certified mail, return receipt requested, postage prepaid; or (iv) one (1) business day after the business day of deposit with a nationally recognized overnight courier, freight prepaid, specifying
next-day delivery, with written verification of receipt. All communications shall be sent to the respective parties at their addresses as set forth on Schedule A or Schedule B (as applicable)
hereto, or to the principal office of the Company and to the attention of the Chief Executive Officer, in the case of the Company, or to such email address, facsimile number, or address as subsequently modified by written notice given in accordance
with this Subsection 6.5. If notice is given to the Company, a copy shall also be sent to Goodwin Procter LLP, 100 Northern Avenue, Boston, MA 02210, Attention: Richard A. Hoffman, Esq., Fax: (617)
977-9449, email: [***]; and if notice is given to OrbiMed Private Investments VI, LP, Atlas Venture Fund X, L.P., Atlas Venture Fund XI, L.P. or Atlas Venture Opportunity Fund I, L.P., a copy shall also be
given to Greenberg Traurig, P.A., 401 E. Las Olas Boulevard, Suite 2000, Fort Lauderdale, FL 33301, Attn: Mathew B. Hoffman, Fax: (954) 759-5532, email: [***]; and if notice is given to Omega Fund VI, L.P., a
copy shall also be given to Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP, 1 Marina Park Drive, Suite 900, Boston, MA 02210, Attention: Jeffrey Engerman, email: [***]. 

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

  
 24. 














 CONFIDENTIAL 
  

 6.6 Amendments and Waivers. Any term of this Agreement may be amended and the
observance of any term of this Agreement may be waived (either generally or in a particular instance, and either retroactively or prospectively) only with the written consent of the Company and the Required Holders (as defined in the Company’s
Certificate of Incorporation); provided that the Company may in its sole discretion waive compliance with Subsection 2.12(c) (and the Company’s failure to object promptly in writing after notification of a proposed
assignment allegedly in violation of Subsection 2.12(c) shall be deemed to be a waiver); and provided further that any provision hereof may be waived by any waiving party on such party’s own behalf, without the
consent of any other party. Notwithstanding the foregoing, (a) this Agreement may not be amended or terminated and the observance of any term hereof may not be waived with respect to any Investor without the written consent of such Investor,
unless such amendment, termination, or waiver applies to all Investors in the same fashion (it being agreed that any waiver of the provisions of Section 4 shall be effective (i) only if all Investors that have rights
under Section 4 are provided the opportunity to participate in such offering to the same extent (on a percentage basis) of their pro rata share and on similar terms as the other Investors who are participating in such
offering or (ii) if none of the Investors elect to participate in such offering), (b) Subsection 5.7 and this clause (b) of this Subsection 6.6) may not be amended, modified, terminated or waived without the written consent
of Surveyor and (c) Subsections 3.1, 3.2 and 4.1 and any other section of this Agreement applicable to the Major Investors (including this clause (c) of this Subsection 6.6) may not be amended, modified,
terminated or waived without the written consent of the holders of a majority of the Registrable Securities then outstanding and held by the Major Investors. Further, Section 2 of this Agreement may not be amended, and no provision of
Section 2 hereof may be waived, in each case, in any way which would adversely affect the rights of the Key Holders hereunder in a manner disproportionate to any adverse effect such amendment or waiver would have on the rights of the Investors
hereunder, without also the written consent of the holders of a majority of the Registrable Securities then outstanding held by the Key Holders; provided, however, any amendment to this Agreement to grant registration rights senior or pari passu to
the Investors in connection with any future issuance of securities of the Company shall not be deemed to adversely affect the rights of the Key Holders hereunder in a manner disproportionate to the Investors. The Company shall give prompt notice of
any amendment or termination hereof or waiver hereunder to any party hereto that did not consent in writing to such amendment, termination, or waiver. Any amendment, termination, or waiver effected in accordance with this Subsection 6.6 shall
be binding on all parties hereto, regardless of whether any such party has consented thereto. No waivers of or exceptions to any term, condition, or provision of this Agreement, in any one or more instances, shall be deemed to be or construed as a
further or continuing waiver of any such term, condition, or provision. 

  
 25. 














 CONFIDENTIAL 
  

 6.7 Severability. In case any one or more of the provisions contained in this
Agreement is for any reason held to be invalid, illegal or unenforceable in any respect, such invalidity, illegality, or unenforceability shall not affect any other provision of this Agreement, and such invalid, illegal, or unenforceable provision
shall be reformed and construed so that it will be valid, legal, and enforceable to the maximum extent permitted by law. 
 6.8
Aggregation of Stock. All shares of Registrable Securities held or acquired by Affiliates shall be aggregated together for the purpose of determining the availability of any rights under this Agreement and such Affiliated persons may
apportion such rights as among themselves in any manner they deem appropriate. 
 6.9 Additional Investors. Notwithstanding
anything to the contrary contained herein, if the Company issues additional shares of Preferred Stock after the date hereof, any purchaser of such shares of Preferred Stock may become a party to this Agreement by executing and delivering an
additional counterpart signature page to this Agreement, and thereafter shall be deemed an “Investor” for all purposes hereunder. No action or consent by the Investors shall be required for such joinder to this Agreement by such additional
Investor, so long as such additional Investor has agreed in writing to be bound by all of the obligations as an “Investor” hereunder. 

6.10 Entire Agreement. This Agreement (including any Schedules and Exhibits hereto) constitutes the full and entire understanding and
agreement among the parties with respect to the subject matter hereof, and any other written or oral agreement relating to the subject matter hereof existing between the parties, including the Prior Agreement, is expressly canceled. 

6.11 Dispute Resolution. The parties (a) hereby irrevocably and unconditionally submit to the jurisdiction of the state courts of
Delaware and to the jurisdiction of the United States District Court for the District of Delaware for the purpose of any suit, action or other proceeding arising out of or based upon this Agreement, (b) agree not to commence any suit, action or
other proceeding arising out of or based upon this Agreement except in the state courts of Delaware or the United States District Court for the District of Delaware, and (c) hereby waive, and agree not to assert, by way of motion, as a
defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally to the jurisdiction of the above-named courts, that its property is exempt or immune from attachment or execution, that the suit, action or
proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court. 

WAIVER OF JURY TRIAL: EACH PARTY HEREBY WAIVES ITS RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT,
THE SECURITIES OR THE SUBJECT MATTER HEREOF. THE SCOPE OF THIS WAIVER IS INTENDED TO BE ALL-ENCOMPASSING OF ANY AND ALL DISPUTES THAT MAY BE FILED IN ANY COURT AND THAT RELATE TO THE SUBJECT MATTER OF THIS
TRANSACTION, INCLUDING, WITHOUT LIMITATION, CONTRACT CLAIMS, TORT CLAIMS (INCLUDING NEGLIGENCE), BREACH OF DUTY CLAIMS, AND ALL OTHER COMMON LAW AND STATUTORY CLAIMS. THIS SECTION HAS BEEN FULLY DISCUSSED BY EACH OF THE PARTIES HERETO AND THESE
PROVISIONS WILL NOT BE SUBJECT TO ANY EXCEPTIONS. EACH PARTY HERETO HEREBY FURTHER WARRANTS AND REPRESENTS THAT SUCH PARTY HAS REVIEWED THIS WAIVER WITH ITS LEGAL COUNSEL, AND THAT SUCH PARTY KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL RIGHTS
FOLLOWING CONSULTATION WITH LEGAL COUNSEL. 

  
 26. 














 CONFIDENTIAL 
  

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

6.13 Publicity. 
 (a) The
Company shall not use the name or logo of Celgene or its Affiliates, or refer to Celgene or its Affiliates, directly or indirectly, in connection with Celgene’s or its Affiliates’ relationship, agreements or arrangements with the Company
in any advertisement, press release, professional or trade publication, or in any other manner, except (i) as may be required by law, (ii) on a confidential basis to potential financing sources, including lenders, investors, investment
bankers or acquirors but only as to the fact of Celgene’s equity investment in the Company and documentation relating thereto, (iii) on a confidential basis to the Company’s lawyers, contractors, accountants and other advisors who
have a need to have access and knowledge of such information, or (iv) with Celgene’s prior written consent, which may be withheld in Celgene’s sole discretion. If the Company believes public disclosure of Celgene’s or its
Affiliates’ relationship, agreements or arrangements with the Company is required by law, the Company shall at a reasonable time before making any such disclosure, consult with Celgene regarding such disclosure, permit Celgene to review such
disclosure not less than ten (10) business days prior to its proposed disclosure (unless the Company is legally obligated to make such disclosure on fewer than ten (10) business days’ notice, in which case the Company shall give
Celgene as much time to review such disclosure as is reasonably practicable), revise such disclosure as reasonably requested by Celgene, and if requested by Celgene, seek confidential treatment for any portion of any agreements or documents intended
to be filed with the Securities and Exchange Commission or other regulatory authority as may be reasonably requested by Investor. 
 (b)
Except as provided in Section 6.13(a) hereof, the Company may not, without the express prior approval of Celgene (which may be given or withheld in Celgene’s sole discretion) issue any press release, advertisement or
announcement (in whatever form) disclosing that Celgene has invested in the Company or make any other disclosure regarding Celgene or its Affiliates. 

[Signature Page to Follow] 

  
 27. 













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

			
	COMPANY:
	
	IKENA ONCOLOGY, INC.
		
	By:	 	 /s/ Mark Manfredi

	Name: Mark Manfredi
	Title: President and Chief Executive Officer
	
	Address:
	50 Northern Avenue, 7th Floor
	Boston, MA 02210


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement] 












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

	
	KEY HOLDERS:
	
	GEORGE GEORGIOU, PH.D.
	
	Signature: /s/ George Georgiou                        
	
	MARYJEAN DOTIS
	
	Signature: /s/ Maryjean Dotis                          
	
	AKIHIRO FURUTA
	
	Signature: /s/ Akihiro Furuta                            
	
	SHINICHI KOIZUMI
	
	Signature: /s/ Shinichi Koizumi                        
	
	ATSUSHI NAGAHISA
	
	Signature: /s/ Atsushi Nagahisa                        
	
	TAKAKO OKUMURA
	
	Signature: /s/ Takako Okumura                        


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

	
	KEY HOLDERS:
	
	YOSHIYUKI OKUMURA
	
	Signature: /s/ Yoshiyuki Okumura                
	
	ANDREW M. SAIDEL
	
	Signature: /s/ Andrew M. Saidel                    
	
	YUKINORI TAKE
	
	Signature: /s/ Yukinori Take                          
	
	MARK MANFREDI
	
	Signature: /s/ Mark Manfredi                        
	
	SILVIA BUONAMICI
	
	Signature: /s/ Silvia Buonamici                     
	
	SIMONE HAUSMANN
	
	Signature: /s/ Simone Hausmann                 
	
	SHANE LOFGREN
	
	Signature: /s/ Shane Lofgren                        


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

	
	KEY HOLDERS:
	
	SERENA LUNARDI
	
	Signature: /s/ Serena Lunardi                    
	
	PAWEL MAZUR
	
	Signature: /s/ Pawel Mazur                        
	
	PETER SMITH
	
	Signature: /s/ Peter Smith                          
	
	DOMINIC REYNOLDS
	
	Signature: /s/ Dominic Reynolds              


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

			
	INVESTOR:
	
	CELGENE CORPORATION
		
	By:	 	 /s/ Daniel O’Connell

		 	Name: Daniel O’Connell
		 	Title: Authorized Signatory


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

			
	INVESTOR:
	
	ORBIMED PRIVATE INVESTMENTS VI, LP
		
	By:	 	OrbiMed Capital GP VI LLC, its General Partner
		
	By:	 	OrbiMed Advisors LLC, its Managing Member
		
	By:	 	 /s/ David Bonita

		 	Name: David Bonita
		 	Title: Member


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

			
	 INVESTOR:

	
	
	 ORBIMED GENESIS MASTER FUND, L.P.

	
	
	 By:
	 	 OrbiMed Genesis GP LLC, its General Partner

		
	 By:
	 	 OrbiMed Advisors LLC, its Managing Member

		
		 	
	 By:
	 	 /s/ C. Scotland Stevens

		 	 Name: C. Scotland Stevens

		 	 Title: Member



  












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

			
	 INVESTOR:

	
	
	 WORLDWIDE HEALTHCARE TRUST PLC

	
	
	 By:
	 	 OrbiMed Capital LLC, solely in its capacity as

Portfolio Manager

		
		 	
	 By:
	 	 /s/ C. Scotland Stevens

		 	 Name: C. Scotland Stevens

		 	 Title: Member



  












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

			
	INVESTOR:
	
	ATLAS VENTURE FUND X, L.P.
		
	By:	 	Atlas Venture Associates X, L.P., its General Partner
		
	By:	 	Atlas Venture Associates X, LLC, its General Partner
		
	By:	 	 /s/ Ommer Chohan

		 	Name: Ommer Chohan
		 	Title: CFO


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

			
	INVESTOR:
	
	ATLAS VENTURE FUND XI, L.P.
		
	By:	 	Atlas Venture Associates XI, L.P., its General Partner
		
	By:	 	Atlas Venture Associates XI, LLC, its General Partner
		
	By:	 	 /s/ Ommer Chohan

		 	Name: Ommer Chohan
		 	Title: CFO


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

			
	INVESTOR:
	
	ATLAS VENTURE OPPORTUNITY FUND I, L.P.
		
	By:	 	Atlas Venture Associates Opportunity I, L.P., its General Partner
		
	By:	 	Atlas Venture Associates Opportunity I, LLC, its General Partner
		
	By:	 	 /s/ Ommer Chohan

		 	Name: Ommer Chohan
		 	Title: CFO


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

			
	INVESTOR:
	
	OMEGA FUND VI, L.P.
	
	By: Omega Fund VI GP, L.P., its General Partner
	
	By: Omega Fund VI GP Manager, Ltd., its General Partner
		
	By:	 	 /s/ Otello Stampacchia

	Name: Otello Stampacchia
	Title: Director


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

			
	INVESTOR:
	
	FIDELITY CAPITAL TRUST: FIDELITY FLEX SMALL CAP FUND – SMALL CAP GROWTH SUBPORTFOLIO
		
	By:	 	 /s/ Chris Maher

	Name: Chris Maher
	Title: Authorized Signatory


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

			
	INVESTOR:
	
	 FIDELITY SECURITIES FUND:

FIDELITY SMALL CAP GROWTH FUND

		
	By:	 	 /s/ Chris Maher

	Name: Chris Maher
	Title: Authorized Signatory


 [Signature Page to Fourth Amended and Restated Investors’ Rights Agreement]













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

			
	INVESTOR:
	
	 FIDELITY SECURITIES FUND:

FIDELITY SMALL CAP GROWTH K6 FUND

		
	By:	 	 /s/ Chris Maher

	Name: Chris Maher
	Title: Authorized Signatory



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	 FIDELITY ADVISOR SERIES VII:

FIDELITY ADVISOR BIOTECHNOLOGY FUND

		
	By:	 	 /s/ Chris Maher

	Name: Chris Maher
	Title: Authorized Signatory



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	FIDELITY CAPITAL TRUST: FIDELITY STOCK SELECTOR SMALL CAP FUND
		
	By:	 	 /s/ Chris Maher

	Name: Chris Maher
	Title: Authorized Signatory



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	 FIDELITY SECURITIES FUND:

FIDELITY SERIES SMALL CAP
 OPPORTUNITIES
FUND

		
	By:	 	 /s/ Chris Maher

	Name: Chris Maher
	Title: Authorized Signatory



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	 FIDELITY SELECT PORTFOLIOS:

BIOTECHNOLOGY PORTFOLIO

		
	By:	 	 /s/ Chris Maher

	Name: Chris Maher
	Title: Authorized Signatory



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	INVUS PUBLIC EQUITIES, L.P.
		
	By:	 	 /s/ Raymond Debbane

	Name: Raymond Debbane
	Title: President of its General Partner



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	HEALTHCOR THERAPEUTICS MASTER FUND, L.P.
		
	By:	 	HealthCor Therapeutics GP, LLC, its General Partner
		
	By:	 	 /s/ Anabelle Perez Gray

		 	Name: Anabelle Perez Gray
		 	Title: General Counsel



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	CITADEL MULTI-STRATEGY EQUITIES MASTER FUND LTD.
		
	By:	 	Citadel Advisors, LLC, its portfolio manager
		
	By:	 	 /s/ Shellane Mulcahy

		 	Name: Shellane Mulcahy 
		 	Title: Authorized Signatory



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	ZONE II HEALTHCARE HOLDINGS, LLC
		
	By:	 	Farallon Capital Management, L.L.C., its Manager
		
	By:	 	 /s/ Philip Dreyfuss

		 	Name: Philip Dreyfuss
		 	Title: Authorized Signatory



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	COWEN HEALTHCARE INVESTMENTS II LP
		
	By:	 	Cowen Healthcare Investments II GP LLC, its General Partner
		
	By:	 	 /s/ Kevin Raidy

		 	Name: Kevin Raidy
		 	Title: Managing Partner
	
	CHI EF II LP
		
	By:	 	Cowen Healthcare Investments II GP LLC, its General Partner
		
	By:	 	 /s/ Kevin Raidy

		 	Name: Kevin Raidy
		 	Title: Managing Partner



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	LOGOS OPPORTUNITIES FUND II, L.P.
		
	By:	 	Logos Opportunities Fund GP, LLC, its General Partner
		
	By:	 	 /s/ Graham Walmsley

		 	Name: Graham Walmsley
		 	Title: Managing Member
	
	LOGOS OPPORTUNITIES FUND II, L.P.
		
	By:	 	Logos Opportunities Fund GP, LLC, its General Partner
		
	By:	 	 /s/ Arsani William

		 	Name: Arsani William
		 	Title: Managing Partner



  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













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

			
	INVESTOR:
	
	BIOTECHNOLOGY VALUE FUND, L.P.
		
	By:	 	 /s/ Mark Lampert

		 	Name: Mark Lampert
		 	 Title:  Chief Executive Officer BVF I GP LLC, itself General Partner of Biotechnology
Value Fund, L.P.

	
	BIOTECHNOLOGY VALUE FUND II, L.P.
		
	By:	 	 /s/ Mark Lampert

		 	Name: Mark Lampert
		 	 Title:  Chief Executive Officer BVF II GP LLC, itself General Partner of Biotechnology
Value Fund, L.P.

	
	BIOTECHNOLOGY VALUE TRADING FUND OS, L.P.
		
	By:	 	 /s/ Mark Lampert

		 	Name: Mark Lampert
		 	 Title:  Chief Executive Officer BVF Partners L.P., itself sole member of BVF Partners
OS Ltd., itself GP of Biotechnology Value Trading Fund OS, L.P.




  
 [Signature Page to
Fourth Amended and Restated Investors’ Rights Agreement] 













 SCHEDULE A 

Investors 
 Celgene Corporation 

86 Morris Avenue 
 Summit, NJ 07901 

Attn: Daniel O’Connell and Andrew Fedder 
 Email: [***];
[***] 
 OrbiMed Private Investments VI, LP 
 Attention:
General Counsel 
 601 Lexington Avenue, 54th Floor 
 New York,
NY 10022 
 Email: [***] 
 Worldwide Healthcare Trust PLC 

Attention: General Counsel 
 601 Lexington Avenue, 54th Floor 

New York, NY 10022 
 Email: [***] 

Orbimed Genesis Master Fund, L.P. 
 Attention: General Counsel

 601 Lexington Avenue, 54th Floor 
 New York, NY 10022 

Email: [***] 
 Atlas Venture Fund X, L.P. 

300 Technology Square, 8th Floor 

Cambridge, MA 02139 
 Attn: Ommer Chohan 

Email: [***] 
 Atlas Venture Fund XI, L.P. 

300 Technology Square, 8th Floor 

Cambridge, MA 02139 
 Attn: Kevin Bitterman 

Email: [***] 
 Atlas Venture Opportunity Fund I, L.P. 

300 Technology Square, 8th Floor 

Cambridge, MA 02139 
 Attn: Ommer Chohan 

Email: [***] 












 Omega Fund VI, L.P. 

888 Boylston Street, Suite 1111 
 Boston, MA 02199 

Fidelity Capital Trust: Fidelity Flex Small Cap Fund – Small Cap Growth Subportfolio 

State Street Bank & Trust 
 PO Box 5756 

Boston, MA 02206 
 Attn: ISLANDMOORING CO FBO Fidelity Capital
Trust: Fidelity Flex Small Cap Fund - Small Cap Growth Subportfolio 
 Email: [***] 

Fax Number: 617-988-9110 

Fidelity Securities Fund: Fidelity Small Cap Growth Fund 

Mag & Co. 
 c/o Brown Brothers Harriman & Co.

 Attn: Corporate Actions/Vault 
 140 Broadway 

New York, NY 10005 
 Email: [***] 

Fidelity Securities Fund: Fidelity Small Cap Growth K6 Fund 
 BNY
Mellon 
 PO Box 392002 
 Pittsburgh, PA 15230 

Email: [***] 
 Fidelity Advisor Series VII: Fidelity Advisor
Biotechnology Fund 
 State Street Bank & Trust 
 PO
Box 5756 
 Boston, MA 02206 
 Attn: Bangle & Co fbo
Fidelity Advisor Series VII: Fidelity Advisor Biotechnology Fund 
 Email: [***] 

Fax Number: 617-988-9110 

Fidelity Capital Trust: Fidelity Stock Selector Small Cap Fund 

Mag & Co. 
 c/o Brown Brothers Harriman & Co.

 Attn: Corporate Actions/Vault 
 140 Broadway 

New York, NY 10005 
 Email: [***] 

Fidelity Securities Fund: Fidelity Series Small Cap Opportunities Fund 

Mag & Co. 
 c/o Brown Brothers Harriman & Co.

 Attn: Corporate Actions/Vault 
 140 Broadway 

New York, NY 10005 
 Email: [***] 












 Fidelity Select Portfolios: Biotechnology Portfolios 

Mag & Co. 
 c/o Brown Brothers Harriman & Co.

 Attn: Corporate Actions/Vault 
 140 Broadway 

New York, NY 10005 
 Email: [***] 

Invus Public Equities, L.P. 
 c/o The Invus Group, LLC 

750 Lexington Avenue 
 New York, NY 10022 

Attn: Raymond Debbane 
 With cc to [***], [***], [***] 

Citadel Multi-Strategy Equities Master Fund Ltd. 
 c/o Citadel
Advisors, LLC 
 601 Lexington Avenue 
 New York, NY 10022 

Attn: Noah Goldberg and Harry Greenbaum 
 [***]; [***]; [***] 

With copies to: 
 Choate, Hall & Stewart, LLP 

Two International Place 
 Boston, MA 02100 

Attention: Brian P. Lenihan and Tobin P. Sullivan 
 [***]; [***]

 Zone II Healthcare Holdings, LLC 
 c/o Farallon Capital
Management, L.L.C. 
 One Maritime Plaza, Suite 2100 
 San
Francisco, CA 94111 
 Attn: Philip Dreyfuss 
 Email: [***];
[***] 












 HealthCor Therapeutics Master Fund, L.P. 

c/o HealthCor Management, L.P. 
 55 Hudson Yards, 28th Floor 
 New York, NY 10001 

Attn: Anabelle Perez Gray 
 Email: [***] 

Cowen Healthcare Investments II LP 
 c/o CHI Advisors LLC 

599 Lexington Ave., 19th Floor 

New York, NY 10022 
 Attn: Kevin Raidy and Tim Anderson 

Email: [***]; [***] 
 CHI EF II LP 

c/o CHI Advisors LLC 
 599 Lexington Ave., 19th Floor 
 New York, NY 10022 

Attn: Kevin Raidy and Tim Anderson 
 Email: [***]; [***] 

Biotechnology Value Fund, L.P. 
 c/o BVF Partners L.P. 

44 Montgomery Street, 40th Floor 

San Francisco, CA 94104 
 Attn: Gorjan Hrustanovic 

Email: [***] 
 Biotechnology Value Fund II, L.P. 

c/o BVF Partners L.P. 
 44 Montgomery Street, 40th Floor 
 San Francisco, CA 94104 

Attn: Gorjan Hrustanovic 
 Email: [***] 

Biotechnology Value Trading Fund OS, L.P. 
 c/o BVF Partners L.P.

 44 Montgomery Street, 40th Floor 

San Francisco, CA 94104 
 Attn: Gorjan Hrustanovic 

Email: [***] 
 Logos Opportunities Fund II, L.P. 

1 Letterman Drive 
 Building D, Suite D3-7300 
 San Francisco, CA 94129 

Attn: Virginia Yee 
 Email: [***] 












 SCHEDULE B 

Key Holders 
 George
Georgiou, Ph.D. 
 [***] 
 [***]

 Maryjean Dotis 
 [***] 

[***] 
 Akihiro Furuta 

c/o AskAt, Inc. 
 4-37-2 Hirojihonmachi 

Showa-ku, Nagoya, Japan, 466-0841 

Shinichi Koizumi 
 c/o AskAt,
Inc. 
 4-37-2 Hirojihonmachi 

Showa-ku, Nagoya, Japan, 466-0841 

Atsushi Nagahisa 
 c/o AskAt,
Inc. 
 4-37-2 Hirojihonmachi 

Showa-ku, Nagoya, Japan, 466-0841 

Takako Okumura 
 c/o AskAt, Inc.

 4-37-2 Hirojihonmachi 

Showa-ku, Nagoya, Japan, 466-0841 

Yoshiyuki Okumura 
 c/o AskAt,
Inc. 
 4-37-2 Hirojihonmachi 

Showa-ku, Nagoya, Japan, 466-0841 

Andrew M. Saidel 
 [***] 

[***] 
 Yukinori Take 

c/o AskAt, Inc. 
 4-37-2 Hirojihonmachi 

Showa-ku, Nagoya, Japan, 466-0841 












 Mark Manfredi 

[***] 
 [***] 

Silvia Buonamici 
 [***] 

[***] 
 Simone Hausmann 

[***] 
 [***] 

Shane Lofgren 
 [***] 

[***] 
 Serena Lunardi 

[***] 
 [***] 

Pawel Mazur 
 [***] 

[***] 
 Peter Smith 

[***] 
 [***] 

Dominic Reynolds 
 [***] 

[***]