Exhibit 4.1


 


INVESTOR’S RIGHTS AGREEMENT


 


THIS INVESTOR’S
RIGHTS AGREEMENT (this “Agreement”), is made as of July 26, 2019, by and between Chimerix,
Inc., a Delaware corporation (the “Company”), and Cantex
Pharmaceuticals, Inc., a Delaware corporation (“Investor”).


 


RECITALS


 


Whereas,
the Company and the Investor are parties to that certain License and Development Agreement of even date herewith (the “License
Agreement”) pursuant to which the Company is issuing the Investor 10,000,000 shares of Common Stock (the “Shares”);
and


 


Whereas,
in order to induce the other party to enter into the License Agreement, each party hereby agrees that this Agreement shall govern
the rights of the Investor to cause the Company to register the Shares, and shall govern certain other matters as set forth in
this Agreement;


 


Now,
Therefore, in consideration of the foregoing premises and the mutual promises, covenants and conditions contained in
this Agreement, the parties hereby agree as follows


 


1.           Definitions.
For purposes of this Agreement:


 


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


 


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


 


1.3           “Common
Stock” means shares of the Company’s common stock, par value $0.001 per share.


 


1.4           “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.


 


1.5           “DGCL”
means the Delaware General Corporation Law, as amended or superseded from time to time


 


1.6           “Exchange
Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.


 




     


     


    

 


1.7           “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.


 


1.8           “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.


 


1.9           “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.


 


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


 


1.11         “Registrable
Securities” means (i) the Shares and (ii) any Common Stock issued as (or issuable upon the conversion or exercise of
any warrant, right, or other security that is issued as) a dividend or other distribution with respect to, or in exchange for or
in replacement of, the Shares; excluding in all cases, however, any Registrable Securities sold by a Person in a transaction in
which the applicable rights under this Agreement are not assigned pursuant to Subsection 5.1,
and excluding for purposes of Section 2 any shares for which registration rights
have terminated pursuant to Subsection 2.12 of this Agreement.


 


1.12         “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.


 


1.13         “Restricted
Securities” means the securities of the Company required to be notated with the legend set forth in Subsection 2.11(b)
hereof.


 


1.14         “SEC”
means the Securities and Exchange Commission.


 


1.15         “SEC
Rule 144” means Rule 144 promulgated by the SEC under the Securities Act.


 


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


 


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


 


1.18         “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 the Investor, except for the fees and disbursements of the Investor Counsel
borne and paid by the Company as provided in Subsection 2.6.


 




    	 	2	 



     


    

 


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 one year anniversary of the date of this Agreement, the Company receives a request from
the Investor that the Company file a Form S-1 registration statement with respect to at least 30% of the Registrable Securities
then outstanding (or a lesser percent if the anticipated aggregate offering price, net of Selling Expenses, would exceed $20 million),
then the Company shall, as soon as practicable, and in any event within 60 days after the date such request is given by the Investor,
file a Form S-1 registration statement under the Securities Act covering all Registrable Securities that the Investor requested
to be registered, subject to the limitations of Subsections 2.1(c) and 2.3.


 


(b)          Form
S-3 Demand. If at any time when it is eligible to use a Form S-3 registration statement, the Company receives a request from
the Investor that the Company file a Form S-3 registration statement with respect to outstanding Registrable Securities of the
Investor having an anticipated aggregate offering price, net of Selling Expenses, of at least $10 million, then the Company shall,
as soon as practicable, and in any event within 45 days after the date such request is given by the Investor, file a Form S-3 registration
statement under the Securities Act covering all Registrable Securities requested to be included in such registration by the Investor,
subject to the limitations of Subsections 2.1(c) and 2.3.


 


(c)          Notwithstanding
the foregoing obligations, if the Company furnishes to Investor 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 be filed, become effective or remain effective for as long as such registration statement
otherwise would be required to remain effective, and it is therefore necessary to defer the filing or effectiveness 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 90 days after the request
of the Investor 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 Subsection 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 one registration pursuant to Subsection 2.1(a); or (iii) if the Investor proposes to dispose of shares of Registrable
Securities that could be registered on Form S-3 pursuant to a request made pursuant to Subsection 2.1(b) (for the avoidance
of doubt, if the Registrable Securities could be registered or requested to be registered on Form S-3 pursuant to Subsection
2.1(b) but due to the limitations of the following sentence are not registered under Subsection 2.1(b), the Company
shall not be obligated to effect, or to take any action to effect, any registration pursuant to Subsection 2.1(a)). The
Company shall not be obligated to effect, or to take any action to effect, any registration pursuant to Subsection 2.1(b)
(i) during the period that is 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 one registration pursuant to Subsection 2.1(b) within the 18 month period immediately preceding the
date of such request. A registration shall not be counted as “effected” for purposes of this Subsection 2.1(d)
until such time as the applicable registration statement has been declared effective by the SEC, unless the Investor withdraws
its request for such registration, elects not to pay the registration expenses therefor, and forfeits its right to one demand registration
statement pursuant to Subsection 2.6, in which case such withdrawn registration statement shall be counted as “effected”
for purposes of this Subsection 2.1(d); provided, that if such withdrawal is during a period the Company has deferred
taking action pursuant to Subsection 2.1(c), then the Investor may withdraw its request for registration and such registration
will not be counted as “effected” for purposes of this Subsection 2.1(d).


 




    	 	3	 



     


    

 


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


 


2.3         Underwriting
Requirements.


 


(a)          If,
pursuant to Subsection 2.1, the Investor intends to distribute the Registrable Securities covered by its request by means
of an underwriting, it shall so advise the Company as a part of its request made pursuant to Subsection 2.1. The underwriter(s)
will be selected by the Company and shall be reasonably acceptable to the Investor. The Investor shall (together with the Company
as provided in Subsection 2.4(e)) enter into an underwriting agreement in customary form with the underwriter(s) selected
for such underwriting.


 


(b)          In
connection with any offering involving an underwriting of shares of the Company’s capital stock pursuant to Subsection
2.2, the Company shall not be required to include any of the Investor’s Registrable Securities in such underwriting unless
the Investor accepts 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.


 




    	 	4	 



     


    

 


(c)          For
purposes of Subsection 2.1, a registration shall not be counted as “effected” if, as a result of an exercise
of the underwriter’s cutback provisions in Subsection 2.3(b), fewer than 50%) of the total number of Registrable Securities
that the Investor has 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 Iinvestor, 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 (i) such 120 day period shall be extended for a period of time equal
to the period the Investor refrains, at the request of an underwriter of Common Stock (or other securities) of the Company, from
selling any securities included in such registration, and (ii) in the case of any registration of Registrable Securities on Form
S-3 that are intended to be offered on a continuous or delayed basis, subject to compliance with applicable SEC rules, such 120
day period shall be extended for up to 360 days, if necessary, to keep the registration statement effective until all such Registrable
Securities are sold;


 


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


 


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


 


(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;


 




    	 	5	 



     


    

 


(h)          promptly
make available for inspection by the Investor, any 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 Investor, 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 the Investor, 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 (all such parties shall enter into a customary confidentiality
agreement with the Company prior to receiving any such records, documents or information or inspecting any properties of the Company);


 


(i)          notify
the Investor, 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 the Investor of any request by the SEC that the Company amend or supplement
such registration statement or prospectus.


 


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 that the Investor 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 the Investor’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 $10,000, of
one counsel for the Investor (“Investor Counsel”), shall be borne and paid by the Company; provided,
however, that the Company shall not be required to pay for any expenses of any registration proceeding begun pursuant to
Subsection 2.1 if the registration request is subsequently withdrawn at the request of the Investor to be registered (in
which case the Investor shall bear such expenses), unless the Investor agrees to forfeit its right to one registration pursuant
to Subsections 2.1(a) or 2.1(b), as the case may be; provided further that if, at the time of
such withdrawal, the Investor shall have learned of a material adverse change in the condition, business, or prospects of the
Company from that known to the Investor at the time of its request and has withdrawn the request with reasonable promptness after
learning of such information then the Investor shall not be required to pay any of such expenses and shall not forfeit its right
to one registration pursuant to Subsections 2.1(a) or 2.1(b).


 


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


 


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


 




    	 	6	 



     


    

 


(a)          To
the extent permitted by law, the Company will indemnify and hold harmless each the Investor, and the partners, members, officers,
directors, and stockholders of each the Investor; legal counsel and accountants for the Investor; any underwriter (as defined in
the Securities Act) for the Investor; and each Person, if any, who controls the Investor or such underwriter within the meaning
of the Securities Act or the Exchange Act, against any Damages, and the Company will pay to the Investor, underwriter, controlling
Person, or other aforementioned Person any legal or other expenses reasonably incurred thereby in connection with investigating
or defending any claim or proceeding from which Damages may result, as such expenses are incurred; provided, however,
that the indemnity agreement contained in this Subsection 2.8(a) shall not apply to amounts paid in settlement of any such
claim or proceeding if such settlement is effected without the consent of the Company, which consent shall not be unreasonably
withheld, nor shall the Company be liable for any Damages to the extent that they arise out of or are based upon actions or omissions
made in reliance upon and in conformity with written information furnished by or on behalf of any the Investor, underwriter, controlling
Person, or other aforementioned Person expressly for use in connection with such registration.


 


(b)          To
the extent permitted by law, the Investor 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 stockholder
selling securities in such registration statement, and any controlling Person of any such underwriter or other stockholder, 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 the Investor expressly for use in connection with
such registration; and the Investor will pay to the Company and each other aforementioned Person any legal or other expenses reasonably
incurred thereby in connection with investigating or defending any claim or proceeding from which Damages may result, as such
expenses are incurred; provided, however, that the indemnity agreement contained in this Subsection 2.8(b)
shall not apply to amounts paid in settlement of any such claim or proceeding if such settlement is effected without the consent
of the Investor, which consent shall not be unreasonably withheld; and provided further that in no event
shall the aggregate amounts payable by the Investor by way of indemnity or contribution under Subsections 2.8(b) and 2.8(d)
exceed the proceeds from the offering received by the Investor (net of any Selling Expenses paid by the Investor), except
in the case of fraud or willful misconduct by the Investor.


 


(c)          Promptly
after receipt by an indemnified party under this Subsection 2.8 of notice of the commencement of any action (including any
governmental action) for which a party may be entitled to indemnification hereunder, such indemnified party will, if a claim in
respect thereof is to be made against any indemnifying party under this Subsection 2.8, give the indemnifying party notice
of the commencement thereof. The indemnifying party shall have the right to participate in such action and, to the extent the indemnifying
party so desires, participate jointly with any other indemnifying party to which notice has been given, and to assume the defense
thereof with counsel mutually satisfactory to the parties; provided, however, that an indemnified party (together
with all other indemnified parties that may be represented without conflict by one counsel) shall have the right to retain one
separate counsel, with the fees and expenses to be paid by the indemnifying party, if representation of such indemnified party
by the counsel retained by the indemnifying party would be inappropriate due to actual or potential differing interests between
such indemnified party and any other party represented by such counsel in such action. The failure to give notice to the indemnifying
party within a reasonable time of the commencement of any such action shall relieve such indemnifying party of any liability to
the indemnified party under this Subsection 2.8, to the extent that such failure materially prejudices the indemnifying
party’s ability to defend such action. The failure to give notice to the indemnifying party will not relieve it of any liability
that it may have to any indemnified party otherwise than under this Subsection 2.8.


 




    	 	7	 



     


    

 


(d)          To
provide for just and equitable contribution to joint liability under the Securities Act in any case in which either: (i) any party
otherwise entitled to indemnification hereunder makes a claim for indemnification pursuant to this Subsection 2.8 but it
is judicially determined (by the entry of a final judgment or decree by a court of competent jurisdiction and the expiration of
time to appeal or the denial of the last right of appeal) that such indemnification may not be enforced in such case, notwithstanding
the fact that this Subsection 2.8 provides for indemnification in such case, or (ii) contribution under the Securities
Act may be required on the part of any party hereto for which indemnification is provided under this Subsection 2.8, then,
and in each such case, such parties will contribute to the aggregate losses, claims, damages, liabilities, or expenses to which
they may be subject (after contribution from others) in such proportion as is appropriate to reflect the relative fault of each
of the indemnifying party and the indemnified party in connection with the statements, omissions, or other actions that resulted
in such loss, claim, damage, liability, or expense, as well as to reflect any other relevant equitable considerations. The relative
fault of the indemnifying party and of the indemnified party shall be determined by reference to, among other things, whether
the untrue or allegedly untrue statement of a material fact, or the omission or alleged omission of a material fact, relates to
information supplied by the indemnifying party or by the indemnified party and the parties’ relative intent, knowledge,
access to information, and opportunity to correct or prevent such statement or omission; provided, however, that,
in any such case (x) the Investor will not be required to contribute any amount in excess of the public offering price of all
such Registrable Securities offered and sold by the Investor 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
the Investor’s liability pursuant to this Subsection 2.8(d), when combined with the amounts paid or payable by the
Investor pursuant to Subsection 2.8(b), exceed the proceeds from the offering received by the Investor (net of any Selling
Expenses paid by the Investor), except in the case of willful misconduct or fraud by the Investor.


 


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


 


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


 




    	 	8	 



     


    

 


2.9         Reports
Under Exchange Act. With a view to making available to the Investor the benefits of SEC Rule 144 and any other rule or regulation
of the SEC that may at any time permit the Investor 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 one year anniversary of the date of this Agreement;


 


(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 the Investor, so long as the Investor 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, the Securities Act, and
the Exchange Act, or that it qualifies as a registrant whose securities may be resold pursuant to Form S-3 and (ii) such other
information as may be reasonably requested in availing the Investor of any rule or regulation of the SEC that permits the selling
of any such securities without registration or pursuant to Form S-3.


 


2.10         “Market
Stand-off” Agreement. The Investor 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 or Form S-3,
and ending on the date specified by the Company and the managing underwriter (such period not to exceed 90 days), (i) lend; offer;
pledge; sell; contract to sell; sell any option or contract to purchase; purchase any option or contract to sell; grant any option,
right, or warrant to purchase; or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any
securities convertible into or exercisable or exchangeable (directly or indirectly) for Common Stock (whether such shares or any
such securities are then owned by the Investor or are thereafter acquired) or (ii) enter into any swap or other arrangement that
transfers to another, in whole or in part, any of the economic consequences of ownership of such securities, whether any such
transaction described in clause (i) or (ii) above is to be settled by delivery of Common Stock or other securities, in cash, or
otherwise. The foregoing provisions of this Subsection 2.10 shall not apply to the sale of any shares to an underwriter
pursuant to an underwriting agreement and shall be applicable to the Investor only if all officers and directors are subject to
the same restrictions. The underwriters in connection with such registration are intended third-party beneficiaries of this Subsection
2.10 and shall have the right, power and authority to enforce the provisions hereof as though they were a party hereto. The
Investor further agrees to execute such agreements as may be reasonably requested by the underwriters in connection with such
registration that are consistent with this Subsection 2.10 or that are necessary to give further effect thereto.


 




    	 	9	 



     


    

 


2.11       Restrictions
on Transfer.


 


(a)          The
Shares shall not be sold, pledged, assigned, donated, transferred or otherwise disposed of, and the Company shall not recognize
and shall issue stop-transfer instructions to its transfer agent with respect to any such sale, pledge, assignment, donation, transfer
or disposition, except upon the conditions specified in this Agreement, which conditions are intended to ensure compliance with
the provisions of the Securities Act. The Investor will cause any proposed purchaser, pledgee, or transferee of the Shares 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 Shares and (ii) any other securities issued in respect of the securities
referenced in clause (i) upon any stock split, stock dividend, recapitalization, merger, consolidation, or similar event, shall
(unless otherwise permitted by the provisions of Subsection 2.11(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 Investor consents
to the Company making a notation in its records and giving instructions to any transfer agent of the Restricted Securities in order
to implement the restrictions on transfer set forth in this Subsection 2.11.


 


(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 Investor thereof shall give notice to
the Company of the Investor’s intention to effect such sale, pledge, or transfer. Each such notice shall describe the manner
and circumstances of the proposed sale, pledge, or transfer in sufficient detail and, if reasonably requested by the Company, shall
be accompanied at the Investor’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 Investor shall be entitled to sell, pledge, or transfer such Restricted Securities in accordance
with the terms of the notice given by the Investor to the Company. 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 Subsection 2.11(b), except that such certificate instrument, or book
entry shall not be notated with such restrictive legend if, in the opinion of counsel for the Investor and the Company, such legend
is not required in order to establish compliance with any provisions of the Securities Act.


 




    	 	10	 



     


    

 


(d)          In
no event may the Investor make any sale, pledge, transfer, assignment, donation or other disposition of the Shares or Registrable
Securities on or before the one year anniversary of this Agreement, except pursuant to a any bona fide third party tender offer,
merger, consolidation or other similar transaction made to all holders of the Company’s capital stock involving a change
of control of the Company which is approved by the Board of Directors (including, without limitation, the entering into any lock-up,
voting or similar agreement pursuant to which the undersigned may agree to transfer, sell, tender or otherwise dispose of common
stock or other such securities in connection with such transaction, or vote any common stock or other such securities in favor
of any such transaction); provided, however, that in the event such tender offer, merger, consolidation or other
such transaction is not completed, the Shares and Registrable Securities shall remain subject to the terms of this Subsection 2.11.


 


2.12       Termination
of Registration Rights. The right of the Investor to request registration or inclusion of Registrable Securities in any registration
pursuant to Subsection 2.1 shall terminate upon the earliest to occur of:


 


(a)          such
time as Rule 144 or another similar exemption under the Securities Act is available for the sale of all of the Shares without limitation
during a three-month period without registration; or


 


(b)          August
1, 2022.


 


The right of the Investor
to request registration or inclusion of Registrable Securities in any registration pursuant to Subsection 2.2 shall terminate
upon the earliest to occur of:


 


(a)          such
time as Rule 144 or another similar exemption under the Securities Act is available for the sale of all of the Shares without limitation
during a three-month period without registration; or


 


(b)          August
1, 2024.


 


3.          Confidentiality.
The Investor agrees that it 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 (including notice of the Company’s
intention to file a registration statement) pursuant to the terms of Article 12 of the License Agreement mutatis mutandis.


 


4.          Standstill
Agreement.


 


(a)          Except
as specifically permitted or required by this Agreement, the Investor will not, directly or indirectly, without the prior approval
of the Board of Directors:


 


		(i)	acquire (or offer, propose or agree to acquire) any shares
of Common Stock by any means whatsoever;



 


		(ii)	engage, or become a participant, in any “solicitation”
of “proxies” (as such terms are defined in Regulation 14A under the Exchange Act) or consents to vote any shares of
Common Stock;



 




    	 	11	 



     


    

 


		(iii)	grant a proxy or otherwise transfer the right to vote any
shares of Common Stock, other than to the Company’s designee(s) pursuant to a proxy solicitation conducted by or on behalf
of the Board of Directors;



 


		(iv)	act or seek to control or influence the management, the
Board of Directors or policies of the Company (by seeking to call a stockholders meeting, proposing or nominating any Person for
election to the Board of Directors, submitting a proposal for action at a stockholders meeting or by consent of the stockholders
in lieu of a meeting, proposing a merger, statutory share exchange or other business combination or extraordinary corporate transaction,
or otherwise);



 


		(v)	publicly disclose any intention, plan or arrangement inconsistent
with the foregoing; or



 


		(vi)	advise, assist or encourage any other Persons in connection
with any of the foregoing or to do any of the foregoing.



 


(b)          The
obligations of the Investor under Section 4(a) shall terminate in the event (i) any bona fide third party tender or exchange
offer is publicly announced and commenced by any Person other than the Investor or an Affiliate of the Investor for at least 50%
of the outstanding shares of Common Stock that is conditioned upon the offeror receiving tenders for at least 50% of the outstanding
shares of Common Stock, or (ii) the Company enters into any agreement to merge or enter into a statutory share exchange with any
Person other than the Investor or an Affiliate of the Investor following the closing of which the Common Stock would cease to be
registered under the Exchange Act. All of the provisions of Section 4(a) shall be reinstated and shall apply in full force
according to their terms in the event that: (A) if the provisions of Section 4(a) shall have terminated as the result of
clause (i), and such tender or exchange offer (as originally made or as amended or modified) shall have terminated without acquisition
by the offeror of at least 50% of the outstanding shares of Common Stock; or (B) if the provisions of Section 4(a) shall
have terminated as a result of clause (ii), such merger or share exchange agreement shall have been terminated prior to its closing.
Upon reinstatement of the provisions of Section 4(a), the provisions of this Section 4(b) shall continue to govern
in the event that any of the events described in this Section 4(b) shall subsequently occur.


 


(c)          Except
as otherwise provided in Section 4(b), the covenants in this Section 4 shall remain in effect until the one year
anniversary of this Agreement.


 


5.          Miscellaneous.


 


5.1         Successors
and Assigns. The rights under this Agreement may not be assigned by the Investor. 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.


 


5.2         Governing
Law. This Agreement and all disputes arising out of or related to this Agreement or any breach hereof are governed by and
construed under the laws of the State of Delaware, without giving effect to any choice of law principles that would require the
application of the laws of a different state.


 




    	 	12	 



     


    

 


5.3         Counterparts.
This Agreement may be executed in one or more counterparts, each of which is an original, but all of which together constitute
one and the same instrument. Each party may execute this Agreement by facsimile transmission or by PDF. In addition, facsimile
or PDF signatures of authorized signatories of any party will be deemed to be original signatures and will be valid and binding,
and delivery of a facsimile or PDF signature by any party will constitute due execution and delivery of this Agreement.


 


5.4         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.


 


5.5         Notices.


 


(a)          All
notices and other communications given or made pursuant to this Agreement shall conform with the requirements of Section 15.3 of
the License Agreement.


 


(b)          Consent
to Electronic Notice. The Investor consents to the delivery of any stockholder notice pursuant to the DGCL, by electronic transmission
pursuant to Section 232 of the DGCL (or any successor thereto) at the electronic mail address or the facsimile number as on the
books of the Company. The 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.


 


5.6         Amendments
and Waivers. Any term of this Agreement may be amended, modified or terminated and the observance of any term of this Agreement
may be waived (either generally or in a particular instance, and either retroactively or prospectively) only with the written
consent of the Company and the Investor; provided that the Company may in its sole discretion waive compliance with Subsection
2.11(c); 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. 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.


 


5.7         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.


 


5.8         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.


 


5.9         Dispute
Resolution. The dispute resolution provision contained in Sections 14.1 and 14.2 of the License Agreement shall apply to this
Agreement mutatis mutandis. 


 


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


 


[Remainder of this page intentionally
left blank] 


 




    	 	13	 



     


    

 


In
Witness Whereof, the Parties hereto have caused this Agreement to be executed by their duly authorized officers as of
the date first written above.


 


	CANTEX PHARMACEUTICALS, INC.	 	CHIMERIX, INC.
	 	 	 	 	 
	By:	/s/ Stephen Marcus	 	By:	/s/ Michael Sherman
	Name: Stephen Marcus	 	 	Michael Sherman
	Title: CEO	 	 	Chief Executive Officer


 


Signature
Page to Investor’s Rights Agreement