EX-4.1





 Exhibit 4.1 

AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

THIS AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT (this “Agreement”), is made as of November 20, 2020, by and
among ACUMEN PHARMACEUTICALS, INC., a Delaware corporation (the “Company”), each of the investors listed on Schedule A hereto, each of which is referred to in this Agreement
as an “Investor” and any Additional Purchaser (as defined in the Purchase Agreement) that becomes a party to this Agreement in accordance with Section 6.9 hereof. 

RECITALS 

WHEREAS, certain of the Investors (the “Existing Investors”) hold shares of Series A
Preferred Stock, Series A-1 Preferred Stock and/or shares of Common Stock issued upon conversion thereof and possess registration rights, information rights, rights of first offer, and other rights pursuant to
that certain Amended and Restated Investors’ Rights Agreement dated as of October 19, 2018, by and among the Company and such Existing Investors (as amended, the “Prior Agreement”); and 

WHEREAS, the Existing Investors are holders of a majority of the Registrable Securities (as defined in
the Prior Agreement), and desire to amend and restate the Prior Agreement in its entirety and to accept the rights created pursuant to this Agreement in lieu of the rights granted to them 

under the Prior Agreement; and 

WHEREAS, certain of the Investors are parties to that certain Series B Preferred Stock Purchase Agreement
of even date herewith by and among the Company and such Investors (the “Purchase Agreement”), under which certain of the Company’s and such Investors’ obligations are conditioned upon the execution and delivery of this
Agreement by such Investors, Existing Investors holding at least a majority of the Registrable Securities, and the Company; 

NOW, THEREFORE, the Existing Investors hereby agree that the Prior
Agreement is hereby amended and restated in its entirety by this Agreement, and the parties to this Agreement further agree as follows: 

1.    Definitions. For purposes of this Agreement: 

1.1    “Affiliate” means, with respect to any specified Person, any other Person who, directly or
indirectly, controls, is controlled by, or is under common control with such Person, including without limitation any general partner, limited partner, managing member, officer, director or trustee of such Person, or any investment fund (including,
without limitation, any venture capital fund) or registered investment company now or hereafter existing that is controlled by one or more general partners, managing members or investment advisers of, or shares the same management company or
investment adviser with, such Person. 
 1.2    “Board of Directors” means the board of directors of
the Company. 
 1.3    “Certificate of Incorporation” means the Company’s Amended and Restated
Certificate of Incorporation, as amended and/or restated from time to time. 
 1.4    “Common Stock”
means shares of the Company’s common stock, par value $0.0001 per share. 

  
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 1.5    “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. 

1.6    “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. 

1.7    “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and
regulations promulgated thereunder. 
 1.8    “Excluded Registration” means (i) a registration
relating to the sale or grant of securities to employees of the Company or a subsidiary pursuant to a stock option, stock purchase, equity incentive or similar plan; (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. 

1.9    “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. 

1.10    “Form S-3” means such form under the Securities Act as in
effect on the date hereof or any registration form under the Securities Act subsequently adopted by the SEC that permits forward incorporation of substantial information by reference to other documents filed by the Company with the SEC. 

1.11    “GAAP” means generally accepted accounting principles in the United States as in effect from time
to time. 
 1.12    “Holder” means any holder of Registrable Securities who is a party to this
Agreement. 
 1.13    “Immediate Family Member” means a child, stepchild, grandchild, parent,
stepparent, grandparent, spouse, life partner or similar statutorily-recognized domestic partner, sibling, mother-in-law, father-in-law, son-in-law, daughter-in-law, brother-in-law, or sister-in-law, including, adoptive relationships, of a natural person
referred to herein. 
 1.14    “Initiating Holders” means, collectively, Holders who properly initiate
a registration request under this Agreement. 
 1.15    “IPO” means the Company’s first
underwritten public offering of its Common Stock under the Securities Act. 

  
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 1.16    “Key Employee” means any executive-level
employee (including, division director and vice president-level positions) as well as any employee who, either alone or in concert with others, develops, invents, programs, or designs any Company Intellectual Property (as defined in the Purchase
Agreement). 
 1.17    “Major Investor” means (i) any Investor that, individually or together with
such Investor’s Affiliates, holds at least 1,333,333 shares of Registrable Securities (as adjusted for any stock split, stock dividend, combination, or other recapitalization or reclassification effected after the date hereof) and
(ii) Blackwell Partners LLC (“Blackwell”) for so long as it holds shares of Registrable Securities. 

1.18    “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. 

1.19    “Person” means any individual, corporation, partnership, trust, limited liability company,
association or other entity. 
 1.20    “Preferred Director” means any director of the Company that the
holders of record of a class, classes or series of Preferred Stock are entitled to elect, exclusively and as a separate class, pursuant to the Certificate of Incorporation. 

1.21    “Preferred Stock” means, collectively, shares of the Series A Preferred Stock, the Series A-1 Preferred Stock and the Series B Preferred Stock. 
 1.22    “RA
Capital” means RA Capital Healthcare Fund, L.P, RA Capital Nexus Fund II, L.P. and their respective Affiliates. 

1.23    “Registrable Securities” means (i) the Common Stock issuable or issued upon conversion of
the Preferred Stock, excluding any Common Stock issued upon conversion of the Series B Preferred Stock pursuant to the “Special Mandatory Conversion” provisions of the Certificate of Incorporation; (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; and (iii) 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 clause (i) 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 Section 6.1, and excluding for purposes of Section 2 any shares for which
registration rights have terminated pursuant to Section 2.13 of this Agreement. 

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

1.25    “Restricted Securities” means the securities of the Company required to be notated with the
legend set forth in Section 2.12(b) hereof. 
 1.26    “Sands Capital” means Sands Capital
Ventures Discovery Fund III, L.P., Sands Capital Global Venture Fund II, L.P., Sands Capital Life Sciences Pulse Fund, LLC and/or their respective Affiliates. 

  
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 1.27    “SEC” means the Securities and Exchange
Commission. 
 1.28    “SEC Rule 144” means Rule 144 promulgated by the SEC under the Securities Act.

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

1.30    “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations
promulgated thereunder. 
 1.31    “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 Section 2.6. 
 1.32    “Series A Preferred Stock” means shares of the
Company’s Series A Preferred Stock, par value $0.0001 per share. 
 1.33    “Series A-1 Preferred Stock” means shares of the Company’s Series A-1 Preferred Stock, par value $0.0001 per share. 

1.34    “Series B Preferred Stock” means shares of the Company’s Series B Preferred Stock, par value
$0.0001 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 the earlier of (i) three
years after the date of this Agreement or (ii) 180 days after the effective date of the registration statement for the IPO, the Company receives a request from Holders of a majority of the Registrable Securities then outstanding that the Company
file a Form S-1 registration statement with respect to all of the Registrable Securities then outstanding held by such Holders covering the registration of Registrable Securities with an anticipated aggregate
offering price, net of Selling Expenses, of at least $5 million, then the Company shall (x) within 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 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 20 days of the date the Demand Notice is given, and in each case, subject to the limitations of Sections 2.1(c) and 2.3. 

(b)    Form S-3 Demand. If at any time when it is eligible to use a Form S-3 registration statement, the Company receives a request from Holders of at least 30% of the Registrable Securities then outstanding that the Company file a Form S-3
registration statement with respect to outstanding Registrable Securities of such Holders having an anticipated aggregate offering price, net of Selling Expenses, of at least $5 million, then the Company shall (i) within 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 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 

  
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to be included in such registration by any other Holders, as specified by notice given by each such Holder to the Company within 20 days of the date the Demand Notice is given, and in each case,
subject to the limitations of Sections 2.1(c) and 2.3. 
 (c)    Notwithstanding the foregoing obligations, if
the Company furnishes to Holders requesting a registration pursuant to this Section 2.1 a certificate signed by the Company’s chief executive officer stating that in the good faith judgment of the Board of Directors it would be
materially detrimental to the Company and its stockholders for such registration statement to either become effective or remain effective for as long as such registration statement otherwise would be required to remain effective, because it would be
materially detrimental to the Company and its stockholders for such registration statement to be filed and it is therefore necessary to defer the filing of such registration statement, 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 120 days after the request of the Initiating Holders is given; provided,
however, that the Company may not invoke this right more than twice in any 12 month period. 
 (d)    The
Company shall not be obligated to effect, or to take any action to effect, any registration pursuant to Section 2.1(a) (i) during the period that is 60 days before the Company’s good faith estimate of the date of filing of, and
ending on a date that is 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 registrations pursuant to Section 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 Section 2.1(b). The Company shall not be obligated to effect, or to take any action to effect, any registration pursuant to Section 2.1(b) (i)
during the period that is 30 days before the Company’s good faith estimate of the date of filing of, and ending on a date that is 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 Section 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 Section 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 Section 2.6, in which
case such withdrawn registration statement shall be counted as “effected” for purposes of this Section 2.1(d). 

2.2    Company Registration. If the Company proposes to register (including, for this purpose, a registration
effected by the Company for stockholders other than the Holders) any of its securities under the Securities Act in connection with the public offering of such securities solely for cash (other than in an Excluded Registration), the Company shall, at
such time, promptly give each Holder notice of such registration. Upon the request of each Holder given within 20 days after such notice is given by the Company, the Company shall, subject to the provisions of Section 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 Section 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 Section 2.6. 

  
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 2.3    Underwriting Requirements. 

(a)    If, pursuant to Section 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 Section 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 Section 2.4(e)) enter into an underwriting agreement in customary form with the underwriter(s) selected for such underwriting; provided, however, that no Holder (or
any of their assignees) shall be required to make any representations, warranties or indemnities except as they relate to Holder’s ownership of shares, and authority to enter into the underwriting agreement and to such Holder’s intended
method of distribution, and the liability of such Holder shall be several and not joint, and limited to an amount equal to the net proceeds from the offering received by such Holder. Notwithstanding any other provision of this
Section 2.3, if the managing underwriter(s) advise(s) the Initiating Holders in writing that marketing factors require a limitation on the number of shares to be underwritten, then the Initiating Holders shall so advise all Holders of
Registrable Securities that otherwise would be underwritten pursuant hereto, and the number of Registrable Securities that may be included in the underwriting shall be allocated among such Holders of Registrable Securities, including the Initiating
Holders, in proportion (as nearly as practicable) to the number of Registrable Securities owned by each Holder or in such other proportion as shall mutually be agreed to by all such selling Holders; provided, however, that the number
of Registrable Securities held by the Holders to be included in such underwriting shall not be reduced unless all other securities are first entirely excluded from the underwriting. 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 100 shares. 

(b)    In connection with any offering involving an underwriting of shares of the Company’s capital stock pursuant
to Section 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. 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 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 25% 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 

  
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are included in such offering. For purposes of the provision in this Section 2.3(b) concerning apportionment, for any selling Holder that is a partnership, limited liability company,
or corporation, the partners, members, retired partners, retired members, stockholders, and Affiliates of such Holder, or the estates and Immediate Family Members of any such partners, retired partners, members, and retired members and any trusts
for the benefit of any of the foregoing Persons, shall be deemed to be a single “selling Holder,” and any pro rata reduction with respect to such “selling Holder” shall be based upon the aggregate number of Registrable Securities
owned by all Persons included in such “selling Holder,” as defined in this sentence. 
 (c)    For purposes
of Section 2.1, a registration shall not be counted as “effected” if, as a result of an exercise of the underwriter’s cutback provisions in Section 2.3(a), fewer than 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 120 days or, if earlier, until the distribution contemplated in the registration statement has been completed; provided, however, that
such 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;

 (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; 

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

(h)    promptly make available for inspection by the selling Holders, any managing underwriter(s) participating in any
disposition pursuant to such registration statement, and any attorney or accountant or other agent retained by any such underwriter or selected by the selling Holders, all financial and other records, pertinent corporate documents, and properties of
the Company, and cause the Company’s officers, directors, employees, and independent accountants to supply all information reasonably requested by any such seller, underwriter, attorney, accountant, or agent, in each case, as necessary or
advisable to verify the accuracy of the information in such registration statement and to conduct appropriate due diligence in connection therewith; 

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

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

2.6    Expenses of Registration. All expenses (other than Selling Expenses) incurred in connection with
registrations, filings, or qualifications pursuant to Section 2, including all registration, filing, and qualification fees; printers’ and accounting fees; fees and disbursements of counsel for the Company; and the reasonable fees
and disbursements, not to exceed $50,000, 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 Section 2.1 if the registration request is subsequently withdrawn at the request of the Holders of a majority of the Registrable Securities to be registered (in which case all
selling Holders shall bear such expenses pro rata based upon the number of Registrable Securities that were to be included in the withdrawn registration), unless the Holders of a majority of the Registrable Securities agree to forfeit their right to
one registration pursuant to Sections 2.1(a) or 2.1(b), as the case may be then the Holders shall not be required to pay any of such expenses and shall not forfeit their right to one registration pursuant to Sections 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. 

  
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 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 and accountants 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 Section 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 except to the extent such information has been corrected in a subsequent writing prior to or
concurrently with the sale of Registrable Securities to the Person asserting the claim. 
 (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 has not been corrected in a subsequent writing prior to or concurrently with the sale of Registrable Securities to the Person asserting the claim; 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 Section 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 Sections 2.8(b) and 2.8(d)
exceed the proceeds from the offering received by such Holder (net of any Selling Expenses paid by such Holder), except in the case of fraud or willful misconduct by such Holder. 

(c)    Promptly after receipt by an indemnified party under this Section 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
Section 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 

  
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interests between such indemnified party and any other party represented by such counsel in such action. The failure to give notice to the indemnifying party within a reasonable time of the
commencement of any such action shall relieve such indemnifying party of any liability to the indemnified party under this Section 2.8, to the extent that such failure materially prejudices the indemnifying party’s ability to defend
such action. The failure to give notice to the indemnifying party will not relieve it of any liability that it may have to any indemnified party otherwise than under this Section 2.8. 

(d)    To provide for just and equitable contribution to joint liability under the Securities Act in any case in which
either: (i) any party otherwise entitled to indemnification hereunder makes a claim for indemnification pursuant to this Section 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 Section 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 Section 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 Section 2.8(d), when combined with the amounts paid or payable by such Holder pursuant to Section 2.8(b), exceed the proceeds from the offering received by such Holder
(net of any Selling Expenses paid by such Holder), except in the case of willful misconduct or fraud by such Holder. 

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

  
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 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 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). 

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 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; provided that this limitation shall not apply to Registrable Securities acquired by any additional Investor that becomes a party to this
Agreement in accordance with Section 6.9. 
 2.11    “Market
Stand-off” Agreement. Each Holder hereby agrees that it will not, without the prior written consent of the managing underwriter, during the period commencing on the date of the final prospectus
relating to the registration by the Company of shares of its Common Stock or any other equity securities under the Securities Act on a registration statement on Form S-1, and ending on the date specified by
the Company and the managing underwriter (such period not to exceed 180 days, or such other period as may be requested by the Company or an underwriter to accommodate regulatory restrictions on (1) the publication or other distribution of
research reports, and (2) analyst recommendations and opinions, including, but not limited to, the restrictions contained in applicable FINRA rules or any successor provisions or amendments thereto), (i) lend; offer; pledge; sell; contract to
sell; sell any option or contract to purchase; purchase any option or contract to sell; grant any option, right, or warrant to purchase; or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities
convertible into or exercisable or exchangeable (directly or indirectly) for Common Stock held immediately before the effective date of the registration statement for such offering 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 Section 2.11 shall apply only to the IPO and shall not apply to (a) the sale of any shares of Common Stock (x) purchased by the Holder in connection with the IPO, whether or not
pursuant to an underwriting agreement, a private placement that is concurrent with the IPO, or otherwise, or (y) acquired in the open market at any time on or after the IPO; (b) the sale of any shares to an underwriter pursuant to an
underwriting agreement, or (c) 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


  
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writing by the restrictions set forth herein, and provided further that any such transfer shall not involve a disposition for value, and shall be applicable to the Holders only if
all officers and directors are subject to the same restrictions and the Company uses commercially reasonable efforts to obtain a similar agreement from all stockholders individually owning more than 1% of the Company’s outstanding Common Stock
(after giving effect to conversion into Common Stock of all outstanding Preferred Stock). The underwriters in connection with such registration are intended third-party beneficiaries of this Section 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 Section 2.11 or that are necessary to give further effect thereto. Any discretionary waiver or termination of the restrictions of any or all of such agreements by the Company or the underwriters shall apply pro rata to all Company
stockholders that are subject to such agreements, based on the number of shares subject to such agreements. 

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. 
 (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 Section 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 Section 2.12. 

(c)    The holder of such Restricted Securities, by acceptance of ownership thereof, agrees to comply in all respects
with the provisions of this Section 2. Before any proposed sale, pledge, or transfer of any Restricted Securities, unless there is in effect a registration statement under the Securities Act covering the proposed transaction, 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 

  
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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; provided that each transferee agrees in writing to be subject to the terms of this
Section 2.12. Each certificate, instrument, or book entry representing the Restricted Securities transferred as above provided shall be notated with, except if such transfer is made pursuant to SEC Rule 144, the appropriate restrictive
legend set forth in Section 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 Sections 2.1 or 2.2 shall terminate upon the earliest to occur of: 

(a)    the closing of a Deemed Liquidation Event, as such term is defined in the Certificate of Incorporation, in which
the consideration received by the Investors in such Deemed Liquidation Event is in the form of cash and/or publicly traded securities, or if the Investors receive registration rights from the acquiring company or other successor to the Company that
are reasonably comparable to those set forth in this Section 2; 
 (b)    such time after consummation of
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 without the requirement for the
Company to be in compliance with the current public information required under subsection (c)(1) of SEC Rule 144) and such Holder (together with its “affiliates” as determined under SEC Rule 144) holds less than one percent (1%) of the
outstanding capital stock of the Company; and 
 (c)    the third anniversary of the IPO. 

3.    Information Rights. 

3.1    Delivery of Financial Statements. The Company shall deliver to each Major Investor, provided
that the Board of Directors has not reasonably determined that such Major Investor is a competitor of the Company; provided further that Sands Capital, RA Capital and Blackwell shall not be determined to be a competitor of the Company
for any purpose under this Agreement: 
 (a)    as soon as practicable, but in any event within 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 Section 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 regionally recognized standing selected
by the Company; 

  
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 (b)    as soon as practicable, but in any event within 45 days after
the end of each of the first three 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 30 days after the end of
each month, unaudited statements of income and cash flows for such month, and an unaudited balance sheet and a 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); 

(d)    as soon as practicable, but in any event within 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 a form reasonably acceptable to each Major Investor, 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; 
 (e)    as soon as
practicable, but in any event 30 days before the end of each fiscal year, a budget and business plan for the next fiscal year, 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 (such budget and business plan that is approved by the Board of Directors including the vote of a majority of the Preferred Directors then seated (the
“Requisite Preferred Director Vote”) is collectively referred to herein as the “Budget”); and 

(f)    such other information relating to the financial condition, business, prospects, or corporate affairs of the
Company as any Major Investor may from time to time reasonably request; provided, however, that the Company shall not be obligated under this Section 3.1 to provide information (i) that the Company reasonably
determines in good faith to be a trade secret or confidential information (unless covered by an enforceable confidentiality agreement, in a form acceptable to the Company); or (ii) the disclosure of which would adversely affect the
attorney-client privilege between the Company and its counsel. 
 If, for any period, the Company has any subsidiary whose accounts are
consolidated with those of the Company, then in respect of such period the financial statements delivered pursuant to the foregoing sections shall be the consolidated and consolidating financial statements of the Company and all such consolidated
subsidiaries. 
 Notwithstanding anything else in this Section 3.1 to the contrary, the Company may cease providing the
information set forth in this Section 3.1 during the period starting with the date 60 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 Section 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. 

  
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 3.2    Inspection. The Company shall permit each Major Investor,
provided that the Board of Directors has not reasonably determined that such Major Investor is a competitor of the Company, 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 Section 3.2 to provide access to any information that it reasonably and in good faith considers to be a trade secret or confidential information (unless covered by an enforceable
confidentiality agreement, in form acceptable to the Company) or the disclosure of which would adversely affect the attorney-client privilege between the Company and its counsel. 

3.3    Termination of Information. The covenants set forth in Section 3.1 and Section 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 the closing of a Deemed Liquidation Event, as such term is defined in the Certificate of Incorporation, whichever event occurs first; provided, that, with respect to clause (iii), the covenants set forth in Section 3.1
shall only terminate if the consideration received by the Investors in such Deemed Liquidation Event is in the form of cash and/or publicly traded securities or if the Investors receive financial information from the acquiring company or other
successor to the Company comparable to those set forth in Section 3.1. 
 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 Section
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 Section 3.4, provided that the Board of Directors has not reasonably determined that such prospective purchaser is a competitor of the Company; (iii) to any Affiliate, any current or
prospective partner, member or stockholder, or any 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; or (iv) as may otherwise be required by law, regulation, rule, court order or subpoena, provided that such Investor promptly notifies the Company of such disclosure and takes reasonable
steps to minimize the extent of any such required disclosure. 
 4.    Rights to Future Stock Issuances. 

4.1    Right of First Offer. Subject to the terms and conditions of this Section 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 and (ii) its Affiliates. 

  
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 (a)    The Company shall give notice (the “Offer
Notice”) to each Major Investor, stating (i) its bona fide intention to offer such New Securities, (ii) the number of such New Securities to be offered, and (iii) the price and terms, if any, upon which it proposes to offer
such New Securities. 
 (b)    By notification to the Company within 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 outstanding (assuming full conversion and/or exercise, as applicable, of all Preferred Stock and any other Derivative Securities then outstanding). At the expiration of such 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 Section 4.1(b) shall occur within the later of 90
days of the date that the Offer Notice is given and the date of initial sale of New Securities pursuant to Section 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
Section 4.1(b), the Company may, during the 90 day period following the expiration of the periods provided in Section 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 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
Section 4.1. 
 (d)    Notwithstanding any provision hereof to the contrary, in lieu of complying with the
provisions of this Section 4.1, the Company may elect to give notice to the Major Investors within thirty (30) days after the issuance of New Securities. Such notice shall describe the type, price, and terms of the New Securities.
Each Major Investor shall have twenty (20) days from the date notice is given to elect to purchase up to the number of New Securities that would, if purchased by such Major Investor, maintain such Major Investor’s percentage-ownership
position, calculated as set forth in Section 4.1(b) before giving effect to the issuance of such New Securities. 

(e)    The right of first offer in this Section 4.1 shall not be applicable to (i) Exempted Securities
(as defined in the Certificate of Incorporation); (ii) shares of Common Stock issued in the IPO; and (iii) the issuance of shares of Preferred Stock to Additional Purchasers pursuant to Section 1.3 of the Purchase Agreement 

  
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 4.2    Termination. The covenants set forth in
Section 4.1 shall terminate and be of no further force or effect (i) immediately before the consummation of the Qualified IPO, as such term is defined in the Certificate of Incorporation, (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 the closing of a Deemed Liquidation Event, as such term is defined in the Certificate of Incorporation in which the consideration
received by the Investors in such Deemed Liquidation Event is in the form of cash and/or publicly traded securities, or if the Investors receive participation rights from the acquiring company or other successor to the Company reasonably comparable
to those set forth in this Section 4, whichever event occurs first. 
 5.    Additional Covenants.

 5.1    Insurance. The Company shall use commercially reasonable efforts to maintain, 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, until such time as the Board of Directors determines that such insurance should be discontinued. The
policy will not be cancelable by the Company without prior approval by the Board of Directors. 
 5.2    Employee
Agreements. The Company will cause (i) each Person now or hereafter employed by it or by any subsidiary (or engaged by the Company or any subsidiary as a consultant/independent contractor) with access to confidential information and/or
trade secrets to enter into a nondisclosure and proprietary rights assignment agreement; and (ii) each Key Employee to enter into a one year non-competition and
non-solicitation agreement, substantially in the form approved by the Board of Directors. 

5.3    Employee Stock. Unless otherwise approved by the Board of 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
(i) vesting of shares over a 4 year period, with the first 25% of such shares vesting following 12 months of continued employment or service, and the remaining shares vesting in equal monthly installments over the following 36 months, and
(ii) a market stand-off provision substantially similar to that in Section 2.11. Without the prior approval by the Board of Directors, the Company shall not amend, modify, terminate, waive or
otherwise alter, in whole or in part, any stock purchase, stock restriction or option agreement with any existing employee or service provider if such amendment would cause it to be inconsistent with this Section 5.3. In addition, unless
otherwise approved by the Board of Directors, the Company shall retain (and not waive) a “right of first refusal” on employee transfers until the Company’s IPO and shall have the right to repurchase unvested shares at cost upon
termination of employment of a holder of restricted stock. 
 5.4    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 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 non-employee director shall be entitled in such person’s discretion to be a member of any committee of the Board of Directors. 

  
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 5.5    Matters Requiring Preferred Director Approval. During such
time or times as the holders of Preferred Stock are entitled to elect a Preferred Director and such seat is filled, the Company hereby covenants and agrees with each of the Investors that it shall not, without approval of the Board of Directors,
which approval must include the Requisite Preferred Director Vote: 
 (a)    make, or permit any subsidiary to make, any
loan or advance to, or own any stock or other securities of, any subsidiary or other corporation, partnership, or other entity unless it is wholly owned by the Company; 

(b)    make, or permit any subsidiary to make, any loan or advance to any Person, including, without limitation, any
employee or director of the Company or any subsidiary, except advances and similar expenditures in the ordinary course of business or under the terms of an employee stock or option plan approved by the Board of Directors; 

(c)    guarantee, directly or indirectly, or permit any subsidiary to guarantee, directly or indirectly, any indebtedness
except for trade accounts of the Company or any subsidiary arising in the ordinary course of business; 
 (d)    make
any investment inconsistent with any investment policy approved by the Board of Directors; 
 (e)    incur any aggregate
indebtedness in excess of $250,000 that is not already included in the Budget (as defined in Section 3.1(e)), other than trade credit incurred in the ordinary course of business; 

(f)    otherwise enter into or be a party to any transaction with any director, officer, or employee of the Company or any
“associate” (as defined in Rule 12b-2 promulgated under the Exchange Act) of any such Person, including without limitation any “management bonus” or similar plan providing payments to
employees in connection with a Deemed Liquidation Event, as such term is defined in the Certificate of Incorporation, except for transactions contemplated by this Agreement and the Purchase Agreement; 

(g)    hire, terminate, or change the compensation of the executive officers, including approving any option grants or
stock awards to executive officers; 
 (h)    change the principal business of the Company, enter new lines of business,
or exit the current line of business; 
 (i)    sell, assign, license, pledge, or encumber material technology or
intellectual property, other than licenses granted in the ordinary course of business; or 
 (j)    enter into any
corporate strategic relationship involving the payment, contribution, or assignment by the Company or to the Company of money or assets greater than $250,000. 

5.6    Successor Indemnification. If the Company or any of its successors or assignees consolidates with or merges
into any other Person and is not the continuing or surviving corporation or entity of such consolidation or merger, then to the extent necessary, proper provision shall be made so that the successors and assignees of the Company assume the
obligations of the Company with respect to indemnification of members of the Board of Directors as in effect immediately before such transaction, whether such obligations are contained in the Company’s Bylaws, the Certificate of Incorporation,
or elsewhere, as the case may be. 
 5.7    Indemnification Matters. The Company hereby acknowledges that one
(1) or more of the Preferred Directors nominated to serve on the Board of Directors by the Investors may have certain rights to indemnification, advancement of expenses and/or insurance provided by one or more of the Investors and certain of
their Affiliates (collectively, the “Investor Indemnitors”). The Company hereby 

  
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agrees (a) that it is the indemnitor of first resort (i.e., its obligations to any such Preferred Director are primary and any obligation of the Investor Indemnitors to advance expenses or
to provide indemnification for the same expenses or liabilities incurred by such Preferred Director are secondary), (b) that it shall be required to advance the full amount of expenses incurred by such Preferred 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 Preferred Director to the extent legally permitted and as required by the Certificate of Incorporation or Bylaws of the Company (or
any agreement between the Company and such Preferred Director), without regard to any rights such Preferred Director may have against the Investor Indemnitors, and, (c) that it irrevocably waives, relinquishes and releases the Investor
Indemnitors from any and all claims against the Investor Indemnitors for contribution, subrogation or any other recovery of any kind in respect thereof. The Company further agrees that no advancement or payment by the Investor Indemnitors on behalf
of any such Preferred Director with respect to any claim for which such Preferred Director has sought indemnification from the Company shall affect the foregoing and the Investor Indemnitors shall have a right of contribution and/or be subrogated to
the extent of such advancement or payment to all of the rights of recovery of such Preferred Director against the Company. The Preferred Directors and the Investor Indemnitors are intended third party beneficiaries of this Section 5.7
and shall have the right, power and authority to enforce the provisions of this Section 5.7 as though they were a party to this Agreement. 

5.8    Right to Conduct Activities. The Company hereby agrees and acknowledges that each of Sands Capital Ventures,
LLC (together with its Affiliates), PBM ACU Holdings, LLC (together with its Affiliates), PBM ACU Holdings II, LLC (together with its Affiliates), Blackwell, and RA Capital (together with its Affiliates) is a professional investment organization,
and as such reviews the business plans and related proprietary information of many enterprises, some of which may compete directly or indirectly with the Company’s business (as currently conducted or as currently propose to be conducted).
Nothing in this Agreement shall preclude or in any way restrict the Investors from evaluating or purchasing securities, including publicly traded securities, of a particular enterprise, or investing or participating in any particular enterprise
whether or not such enterprise has products or services which compete with those of the Company; and the Company hereby agrees that, to the extent permitted under applicable law, Sands Capital Ventures, LLC (and its Affiliates), PBM ACU Holdings,
LLC (together with its Affiliates), PBM ACU Holdings II, LLC (together with its Affiliates), Blackwell and RA Capital (or its Affiliates) shall not be liable to the Company for any claim arising out of, or based upon, (i) the investment by
Sands Capital Ventures, LLC (or its Affiliates), PBM ACU Holdings, LLC (together with its Affiliates), PBM ACU Holdings II, LLC (together with its Affiliates), Blackwell or RA Capital (or its Affiliates) in any entity competitive with the Company,
or (ii) actions taken by any partner, officer, employee or other representative of Sands Capital Ventures, LLC (or its Affiliates), PBM ACU Holdings, LLC (together with its Affiliates), PBM ACU Holdings II, LLC (together with its Affiliates),
Blackwell or RA Capital (or its Affiliates) 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 the Investors 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. 

5.9    Side Letters. The Company agrees and covenants that it will promptly notify (and provide a copy to) RA
Capital and Sands Capital if it enters into any separate agreements or side letters with any other shareholder of the Company or an affiliate of any such shareholder (other than the Transaction Agreements (as defined in the Purchase Agreement) and
employment related agreements in the ordinary course). 
 5.10    Termination of Covenants. The covenants set
forth in this Section 5, except for Section 5.6, shall terminate and be of no further force or effect (i) immediately before the consummation 

  
 19 













 
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 such term is defined in the Certificate of Incorporation, whichever event occurs first. 

6.    Miscellaneous. 

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

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

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

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

(a)    All notices and other communications given or made pursuant to this Agreement shall be in writing and shall be
deemed effectively given upon the earlier of actual receipt or (i) personal delivery to the party to be notified; (ii) when sent, if sent by electronic mail or facsimile during the recipient’s normal business hours, and if not sent
during normal business hours, then on the recipient’s next business day; (iii) five days after having been sent by registered or certified mail, return receipt requested, postage prepaid; or (iv) one business day after the business
day of deposit with a nationally recognized overnight courier, freight prepaid, specifying next-day delivery, with written verification of 

  
 20 













 
receipt. All communications shall be sent to the respective parties at their addresses as set forth on Schedule A 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 Section 6.5. address as subsequently modified by
written notice given in accordance with this Section 6.5. If notice is given to the Company, a copy (which shall not constitute notice) shall also be sent to Cooley LLP, 1299 Pennsylvania Avenue NW, Suite 700, Washington, DC 20004,
Attention: Brooke Nussbaum. If notice is given to Investors, a copy (which shall not constitute notice) shall also be sent to Wilson Sonsini Goodrich & Rosati, Professional Corporation, 28 State Street, 37th Floor, Boston, MA 02109,
Attention: Jennifer Fang. 
 (b)    Consent to Electronic Notice. Each Investor consents to the delivery of any
stockholder notice pursuant to the Delaware General Corporation Law (the “DGCL”), as amended or superseded from time to time, by electronic transmission pursuant to Section 232 of the DGCL (or any successor thereto) at the
electronic mail address or the facsimile number set forth below such Investor’s name on the Schedule hereto, as updated from time to time by notice to the Company, or as on the books of the Company. To the extent that any notice given by means
of electronic transmission is returned or undeliverable for any reason, the foregoing consent shall be deemed to have been revoked until a new or corrected electronic mail address has been provided, and such attempted electronic notice shall be
ineffective and deemed to not have been given. Each Investor agrees to promptly notify the Company of any change in such stockholder’s electronic mail address, and that failure to do so shall not affect the foregoing. 

6.6    Amendments and Waivers. Any term of this Agreement may be amended, modified or terminated and the observance
of any term of this Agreement may be waived (either generally or in a particular instance, and either retroactively or prospectively) only with the written consent of (i) the Company and (ii) the holders of at least 67% of the shares of
Common Stock issued or issuable upon conversion of the shares of Series B Preferred Stock held by the Investors (voting together as a single class), excluding any Common Stock issued upon conversion of the Series B Preferred Stock pursuant to the
“Special Mandatory Conversion” provisions of the Certificate of Incorporation.; provided that the Company may in its sole discretion waive compliance with Section 2.12(c) (and the Company’s failure to object
promptly in writing after notification of a proposed assignment allegedly in violation of Section 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, modified 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, modification, termination, or waiver applies to all Investors in the same fashion (it being agreed that a waiver of the provisions of Section 4 with respect to
a particular transaction shall be deemed to apply to all Investors in the same fashion if such waiver does so by its terms, notwithstanding the fact that certain Investors may nonetheless, by agreement with the Company, purchase securities in such
transaction) and (b) Sections 3.1 and 3.2, Section 4 and any other section of this Agreement applicable to the Major Investors (including this clause (b) of this Section 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. Notwithstanding the foregoing, Schedule A hereto may be amended by the
Company from time to time to add transferees of any Registrable Securities in compliance with the terms of this Agreement without the consent of the other parties; and Schedule A hereto may also be amended by the Company after the date of
this Agreement without the consent of the other parties to add information regarding any additional Investor who becomes a party to this Agreement in accordance with Section 6.9. Any amendment, modification, termination, or waiver
effected in accordance with this Section 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. 

  
 21 













 6.7    Severability. In case any one or more of the provisions
contained in this Agreement is for any reason held to be invalid, illegal or unenforceable in any respect, such invalidity, illegality, or unenforceability shall not affect any other provision of this Agreement, and such invalid, illegal, or
unenforceable provision shall be reformed and construed so that it will be valid, legal, and enforceable to the maximum extent permitted by law. 

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

6.9    Additional Investors. Notwithstanding anything to the contrary contained herein, if the Company issues
additional shares of the Company’s Preferred Stock after the date hereof, whether pursuant to the Purchase Agreement or otherwise, 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 is expressly canceled. Upon the effectiveness
of this Agreement, the Prior Agreement shall be deemed amended and restated and superseded and replaced in its entirety by this Agreement, and shall be of no further force or effect. 

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. 

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. 

  
 22 













 6.13    Special Mandatory Conversion. In the event that the
Series B Preferred Stock held by an Investor is converted into Common Stock (the “Converted Stock”) pursuant to the “Special Mandatory Conversion” provisions of the Certificate of Incorporation, such Investor shall cease
to be entitled to any of the rights and privileges granted to an Investor or Major Investor pursuant to this Agreement with respect to such shares of Converted Stock. 

[Remainder of Page Intentionally Left Blank] 

  
 23 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	COMPANY:
	
	ACUMEN PHARMACEUTICALS, INC. 
		
	By:	 	 /s/ Daniel J. O’Connell

	Name:	 	Daniel J. O’Connell
	Title:	 	Chief Executive Officer


 
			
		
	Address:	 	     427 Park Street

    Charlottesville, VA 22902

	
	E-Mail: doconnell@acumenpharm.com



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Joseph Andrasko

	Joseph Andrasko



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	ARROCHAR INVESTMENTS LLC
		
	By:	 	 /s/ John Macfarlane

	Name:	 	John Macfarlane
	Title:	 	Managing Member



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	BLACKROCK HEALTH SCIENCES TRUST
		
	By:	 	BlackRock Advisors, LLC, its Investment Adviser


 
			
		
	By:	 	 /s/ Hongying Erin Xie

	Name:	 	Hongying Erin Xie
	Title:	 	Managing Director
	
	BLACKROCK HEALTH SCIENCES TRUST II


 
			
	By:	 	BlackRock Advisors, LLC, its Investment Adviser


 
			
		
	By:	 	 /s/ Hongying Erin Xie

	Name:	 	Hongying Erin Xie
	Title:	 	Managing Director



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	BLACKWELL PARTNERS LLC – SERIES A
		
	By:	 	 /s/ Abayomi A. Adigun

	Name:	 	Abayomi A. Adigun
	Title:	 	Investment Manager
		 	DUMAC, Inc., Authorized Signatory
		
	By:	 	 /s/ Jannine M. Lall

	Name:	 	Jannine M. Lall
	Title:	 	Head of Finance & Controller
		 	DUMAC, Inc., Authorized Signatory


 
			
		
	Address:	 	 Blackwell Partners LLC – Series A

		 	 280 S. Mangum Street

		 	 Suite 210

		 	 Durham, NC 27701

		 	 Attn: Jannine Lall




  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Frank A. Bonsal, Jr.

	Frank A. Bonsal, Jr.



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	BIOTECHNOLOGY VALUE FUND, LP
	By:	 	BVF Partners, L.P., its general partner
	By:	 	BVF, Inc., its general partner


 
			
		
	By:	 	 /s/ Mark N. Lampert

	Name:	 	Mark N. Lampert
	Title:	 	President
	
	INVESTMENT 10, LLC


 
			
	By:	 	BVF Partners, L.P., its attorney-in-fact
	By:	 	BVF, Inc., its general partner


 
			
		
	By:	 	 /s/ Mark N. Lampert

	Name:	 	Mark N. Lampert
	Title:	 	President
	
	BIOTECHNOLOGY VALUE FUND II, LP


 
			
	By:	 	BVF Partners, L.P., its general partner
	By:	 	BVF, Inc., its general partner


 
			
		
	By:	 	 /s/ Mark N. Lampert

	Name:	 	Mark N. Lampert
	Title:	 	President
	
	BVF INVESTMENTS, L.L.C.


 
			
	By:	 	BVF Partners, L.P., its manager
	By:	 	BVF, Inc., its general partner


 
			
		
	By:	 	 /s/ Mark N. Lampert

	Name:	 	Mark N. Lampert
	Title:	 	President



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Alex Casdin

	Alex Casdin



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	CHARLOTTESVILLE AREA COMMUNITY FOUNDATION
		
	By:	 	 /s/ Jan
Dorman                            

	Name:	 	Jan Dorman
	Title:	 	Director of Finance



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	CLELAND FAMILY III, LLC
		
	By:	 	 /s/ Bruce Cleland

	Name:	 	Bruce Cleland
	Title:	 	Managing Partner



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	 /s/ Terrence D.
Daniels                                        


	Terrence D. Daniels
	
	TERRENCE D. DANIELS 2008 CHILDREN’S TRUST
		
	By:	 	 /s/ Terrence D.
Daniels                            

	Name:	 	Terrence D. Daniels
	Title:	 	Trustee
	
	TERRENCE D. DANIELS 2010 GRANDCHILDREN’S TRUST
		
	By:	 	 /s/ Terrence D. Daniels

	Name:	 	Terrence D. Daniels
	Title:	 	Trustee



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Tim Davis

	 Tim Davis




  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	EUGENE V. FIFE REVOCABLE TRUST DTD APRIL 24, 2002
		
	By:	 	 /s/ Eugene V. Fife

	Name:	 	Eugene V. Fife
	Title:	 	Trustee



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Caleb Finch

	Caleb Finch



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	GLYNN INVESTMENT COMPANY, LLC
		
	By:	 	 /s/ John Glynn

	Name:	 	John Glynn
	Title:	 	Chief Executive



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Philip Goelet

	Philip Goelet



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	H7 HOLDINGS, LLC
		
	By:	 	 /s/ Robert Hardie

	Name:	 	Robert Hardie
	Title:	 	Co-Chairman and CEO



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 MARK J. KINGTON & ANN KINGTON
TBE
 c/o Dyson Capital Advisors, LLC

	
	 /s/ Mark J. Kington

	Mark J. Kington
	
	 /s/ Ann Kington

	Ann Kington



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	KNOLLWOOD INVESTMENT FUND LLC
		
	By:	 	 /s/ Kevin D. Irwin, Jr.

	Name:	 	Kevin D. Irwin, Jr.
	Title:	 	President of Managing Member



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	MARC D. KOZIN IRREVOCABLE TRUST, DONNA M. KOZIN, TRUSTEE
		
	By:	 	 /s/ Donna M. Kozin

	Name:	 	Donna M. Kozin
	Title:	 	Trustee



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Grant A. Krafft

	Grant A. Krafft



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	LEVEL ONE PARTNERS, LLC
		
	By:	 	 /s/ Robert Hardie

	Name:	 	Robert Hardie
	Title:	 	Manager



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ John L. Lewis IV

	John L. Lewis IV



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	DAVID V MILLIGAN TRUST DATED OCT 19, 1991
		
	By:	 	 /s/ David Milligan

	Name:	 	David Milligan
	Title:	 	Trustee



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	MRW BLIND TRUST
	c/o Dyson Capital Advisors, LLC
		
	By:	 	 /s/ Nicholas Perrins

	Name:	 	Nicholas Perrins
	Title:	 	Trustee



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Edward Meigs

	Edward Meigs



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	JAMES B. MURRAY, JR. REVOCABLE TRUST U/A/D 8/5/1991
		
	By:	 	 /s/ James B. Murray, Jr.

	Name:	 	James B. Murray, Jr.
	Title:	 	Trustee



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	NEUROVENTURES CAPITAL LLC
		
	By:	 	 /s/ Daniel O’Connell

	Name:	 	Daniel O’Connell
	Title:	 	Managing Member



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	 PBM ACU HOLDINGS, LLC

By PBM Capital Group, LLC, its manager

		
	By:	 	 /s/ Paul B. Manning

	Name:	 	Paul B. Manning
	Title:	 	CEO
		
	Date:	 	11/20/2020
	
	 PBM ACU HOLDINGS II, LLC

By: PBM Capital Group, LLC, its manager

		
	By:	 	 /s/ Paul B. Manning

	Name:	 	Paul B. Manning
	Title:	 	CEO
		
	Date:	 	11/20/2020



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	PRAXIS TECHNOLOGIES L.P.
		
	By:	 	 /s/ James B. Murray, Jr.

	Name:	 	James B. Murray, Jr.
	Title:	 	Manager



  

SIGNATURE PAGE TO AMENDED AND RESTATED
INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	PROTECTIVE INSURANCE COMPANY INC.
		
	By:	 	 /s/ Mark McNeill

	Name:	 	Mark McNeill
	Title:	 	Financial Reporting Manager



  

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INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	RA CAPITAL HEALTHCARE FUND, L.P.
	
	 By: RA Capital Healthcare Fund GP, LLC

Its General Partner

		
	By:	 	 /s/ Rajeev Shah

	Name:	 	Rajeev Shah
	Title:	 	Manager
		
	Address:	 	 RA Capital Management, L.P.

200 Berkeley Street
 18th Floor
 Boston, MA 02116

Attn: General Counsel

	
	RA CAPITAL NEXUS FUND II, L.P.
	By: RA Capital Nexus Fund II GP, LLC
	Its: General Partner
		
	By:	 	 /s/ Rajeev Shah

	Name:	 	Rajeev Shah
	Title:	 	Manager
		
	Address:	 	 RA Capital Management, L.P.

200 Berkeley Street
 18th Floor
 Boston, MA 02116

Attn: General Counsel




  

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INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	R3 CAPITAL STRATEGIES, LLC
		
	By:	 	 /s/ Robert Brown

	Name:	 	Robert Brown
	Title:	 	Owner



  

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 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Dru Rasmussen

	Dru Rasmussen



  

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INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	ROCK SPRINGS CAPITAL MASTER FUND LP
	
	By: Rock Springs General Partner LLC, its General Partner
		
	By:	 	 /s/ Mark Bussard

	Name:	 	Mark Bussard
	Title:	 	Member
	
	FOUR PINES MASTER FUND LP
	By: Four Pines General Partner LLC, its General Partner
		
	By:	 	 /s/ Mark Bussard

	Name:	 	Mark Bussard
	Title:	 	Member



  

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INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	SANDS CAPITAL LIFE SCIENCES PULSE FUND, LLC
		
	By:	 	 /s/ Jonathan Goodman

	Name:	 	Jonathan Goodman
	Title:	 	General Counsel
	
	SANDS CAPITAL GLOBAL VENTURE FUND II, L.P.
	
	 By: Sands Capital Global Venture Fund II-GP, L.P., Its

General Partner

	
	By: Sands Capital Global Venture Fund II-GP, LLC, Its General Partner
		
	By:	 	 /s/ Jonathan Goodman

	Name:	 	Jonathan Goodman
	Title:	 	General Counsel
	
	SANDS CAPITAL VENTURES DISCOVERY FUND III, L.P.
	
	 By: Sands Capital Ventures Discovery Fund III-GP, LLC,

its general partner

		
	By:	 	 /s/ Jonathan Goodman

	Name:	 	Jonathan Goodman
	Title:	 	General Counsel



  

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INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ David Summa

	David Summa



  

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INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Hans Utsch

	Hans Utsch



  

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INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	VALINCO INVESTMENTS LIMITED
		
	By:	 	 /s/ A.H.D. Weldon

	Name:	 	A.H.D. Weldon
	Title:	 	Director



  

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 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Spencer Wheeler

	Spencer Wheeler



  

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INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

	
	INVESTOR:
	
	 /s/ Wm Matthew Zuga

	Wm Matthew Zuga



  

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INVESTORS’ RIGHTS AGREEMENT 













 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	MIDDLELAND ENDOWMENT I, LLC
		
	By:	 	 /s/ Arthur X. Duffy

	Name:	 	Arthur X. Duffy
	Title:	 	Manager



  

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 IN WITNESS WHEREOF, the parties have executed this Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	INVESTOR:
	
	DALTON TRUST - 1995
		
	By:	 	 /s/ David P. Mixer

	Name:	 	David P. Mixer
	Title:	 	Trustee



  

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 SCHEDULE A 

INVESTORS