EX-10.4





 Exhibit 10.4 

FORM OF REGISTRATION RIGHTS AGREEMENT 

THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of        , 2020, is
made and entered into by and among Supernova Partners Acquisition Company, Inc., a Delaware corporation (the “Company”), and Supernova Partners LLC, a Delaware limited liability company (the “Sponsor”), and the
undersigned parties listed under Holders on the signature page hereto (each such party, together with the Sponsor and any person or entity who hereafter becomes a party to this Agreement pursuant to Section 5.2 of this
Agreement, a “Holder” and collectively the “Holders”). 
 RECITALS 

WHEREAS, the Company and the Sponsor have entered into that certain Securities Subscription Agreement, dated as of September 9,
2020, pursuant to which the Sponsor purchased an aggregate of 11,500,000 shares of the Company’s Class B common stock, par value $0.0001 per share (the “Class B Ordinary Shares”); 

WHEREAS, on September 14, 2020, the Company effected a
0.75-for-1 reverse stock split of the Class B Ordinary Shares, resulting in 8,625,000 Class B Ordinary Shares (the “Founder Shares”)
outstanding (up to 1,125,000 of which are subject to forfeiture depending on the extent to which the underwriters’ over-allotment option is exercised); 

WHEREAS, on September 25, 2020, the Company transferred 34,500 Founder Shares to each of its five independent director nominees;

 WHEREAS, the Founder Shares are convertible into shares of the Company’s Class A common stock, par value $0.0001 per
share (the “Common Stock”), on the terms and conditions provided in the Company’s amended and restated certificate of incorporation, as may be amended from time to time; 

WHEREAS, on        , 2020, the Company and the Sponsor entered into that certain Sponsor
Warrants Purchase Agreement, pursuant to which the Sponsor agreed to purchase 5,333,333 warrants (or up to 5,933,333 warrants if the over-allotment option in connection with the Company’s initial public offering is exercised in full) (the
“Private Placement Warrants”), in a private placement transaction occurring simultaneously with the closing of the Company’s initial public offering; 

WHEREAS, in order to fund working capital deficiencies or finance the Company’s transaction costs in connection with an intended
Business Combination (as defined below), the Sponsor or an affiliate of the Sponsor or certain of the Company’s officers or directors may, but are not obligated to, loan the Company funds as the Company may require, of which up to $1,500,000 of
such loans may be convertible into an additional 1,000,000 Private Placement Warrants (the “Working Capital Warrants”); and 

WHEREAS, the Company and the Holders desire to enter into this Agreement, pursuant to which the Company shall grant the Holders certain
registration rights with respect to certain securities of the Company, as set forth in this Agreement. 












 NOW, THEREFORE, in consideration of the representations, covenants and
agreements contained herein, and certain other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound, hereby agree as follows: 

ARTICLE I. 

DEFINITIONS 
 1.1
Definitions. The terms defined in this Article I shall, for all purposes of this Agreement, have the respective meanings set forth below: 

“Adverse Disclosure” shall mean any public disclosure of material non-public information, which
disclosure, in the good faith judgment of the Chief Executive Officer or the Chief Financial Officer of the Company, after consultation with counsel to the Company, (i) would be required to be made in any Registration Statement or Prospectus in
order for the applicable Registration Statement or Prospectus not to contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements contained therein (in the case of any prospectus and any
preliminary prospectus, in the light of the circumstances under which they were made) not misleading, (ii) would not be required to be made at such time if the Registration Statement were not being filed, and (iii) the Company has a bona
fide business purpose for not making such information public. 
 “Agreement” shall have the meaning given in the Preamble. 

“Board” shall mean the Board of Directors of the Company. 

“Business Combination” shall mean any merger, capital stock exchange, asset acquisition, stock purchase, reorganization or other similar
business combination with one or more businesses, involving the Company. 
 “Founder Shares” shall have the meaning given in the Recitals
hereto. 
 “Commission” shall mean the U.S. Securities and Exchange Commission. 

“Common Stock” shall have the meaning given in the Recitals hereto. 

“Company” shall have the meaning given in the Preamble. 

“Demand Registration” shall have the meaning given in subsection 2.1.1. 

“Demanding Holder” shall have the meaning given in subsection 2.1.1. 

“Exchange Act” shall mean the Securities Exchange Act of 1934, as it may be amended from time to time. 

“Form S-1” shall have the meaning given in subsection 2.1.1. 

  
 2 













 “Form S-3” shall have the meaning given in
subsection 2.3. 
 “Founder Shares” shall have the meaning given in the Recitals hereto and shall be deemed to include the shares of
Common Stock issuable upon conversion thereof. 
 “Founder Shares Lock-up Period” shall mean, with
respect to the Founder Shares, the period ending on the earlier of (A) one year after the completion of the Company’s initial Business Combination and (B) subsequent to the Business Combination, (x) if the last reported sale
price of the Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day
period commencing at least 150 days after the Company’s initial Business Combination or (y) the date on which the Company completes a liquidation, merger, stock exchange, reorganization or other similar transaction that results in all of
the Company’s public stockholders having the right to exchange their shares of Common Stock for cash, securities or other property. 

“Holders” shall have the meaning given in the Preamble. 

“Insider Letter” shall mean that certain letter agreement, dated as of the date hereof, by and among the Company, the Sponsor and each of the
Company’s officers, directors and director nominees. 
 “Maximum Number of Securities” shall have the meaning given in subsection
2.1.4. 
 “Misstatement” shall mean an untrue statement of a material fact or an omission to state a material fact required to be
stated in a Registration Statement or Prospectus or necessary to make the statements in a Registration Statement or Prospectus (in the case of any Prospectus, in the light of the circumstances under which they were made) not misleading. 

“Permitted Transferees” shall mean a person or entity to whom a Holder of Registrable Securities is permitted to transfer such Registrable
Securities prior to the expiration of the Founder Shares Lock-up Period or Private Placement Lock-up Period, as the case may be, under the Insider Letter, this Agreement
and any other applicable agreement between such Holder and the Company and to any transferee thereafter. 
 “Piggyback Registration” shall
have the meaning given in subsection 2.2.1. 
 “Private Placement Lock-up Period” shall
mean, with respect to Private Placement Warrants that are held by the initial purchasers of such Private Placement Warrants or their Permitted Transferees, and any of the Common Stock issued or issuable upon the exercise or conversion of the Private
Placement Warrants and that are held by the initial purchasers of the Private Placement Warrants or their Permitted Transferees, the period ending 30 days after the completion of the Company’s initial Business Combination. 

“Private Placement Warrants” shall have the meaning given in the Recitals hereto. 

“Prospectus” shall mean the prospectus included in any Registration Statement, as supplemented by any and all prospectus supplements and as
amended by any and all post-effective amendments and including all material incorporated by reference in such prospectus. 

  
 3 













 “Registrable Security” shall mean (a) the Founder Shares (including any shares of
Common Stock issued or issuable upon the conversion of any such Founder Shares), (b) the Private Placement Warrants (including any shares of the Common Stock issued or issuable upon the exercise of any such Private Placement Warrants), (c) any
outstanding share of the Common Stock or any other equity security (including the shares of the Common Stock issued or issuable upon the exercise of any other equity security) of the Company held by a Holder as of the date of this Agreement,
(d) any equity securities (including the shares of Common Stock issued or issuable upon the exercise of any such equity security) of the Company issuable upon conversion of Working Capital Warrants, and (e) any other equity security of the
Company issued or issuable with respect to any such share of the Common Stock by way of a stock dividend or stock split or in connection with a combination of shares, recapitalization, merger, consolidation or reorganization; provided,
however, that, as to any particular Registrable Security, such securities shall cease to be Registrable Securities when: (A) a Registration Statement with respect to the sale of such securities shall have become effective under the
Securities Act and such securities shall have been sold, transferred, disposed of or exchanged in accordance with such Registration Statement; (B) such securities shall have been otherwise transferred, new certificates for such securities not
bearing a legend restricting further transfer shall have been delivered by the Company and subsequent public distribution of such securities shall not require registration under the Securities Act; (C) such securities shall have ceased to be
outstanding; (D) such securities are sold without registration pursuant to Rule 144 promulgated under the Securities Act; or (E) such securities have been sold to, or through, a broker, dealer or underwriter in a public distribution or
other public securities transaction. 
 “Registration” shall mean a registration effected by preparing and filing a registration statement
or similar document in compliance with the requirements of the Securities Act, and the applicable rules and regulations promulgated thereunder, and such registration statement becoming effective. 

“Registration Expenses” shall mean the out-of-pocket expenses
of a Registration, including, without limitation, the following: 
  

	(a)	 all registration and filing fees (including fees with respect to filings required to be made with the Financial
Industry Regulatory Authority, Inc.) and any securities exchange on which the Common Stock is then listed; 


  

	(b)	 fees and expenses of compliance with securities or blue sky laws (including reasonable fees and disbursements
of counsel for the Underwriters in connection with blue sky qualifications of Registrable Securities); 


  

	(c)	 printing, messenger, telephone and delivery expenses; 



 

	(d)	 reasonable fees and disbursements of counsel for the Company; 



 

	(e)	 reasonable fees and disbursements of all independent registered public accountants of the Company incurred
specifically in connection with such Registration; and 



  
 4 














	(f)	 reasonable fees and expenses of one (1) legal counsel selected by the majority-in-interest of the Demanding Holders initiating a Demand Registration to be registered for offer and sale in the applicable Registration. 



“Registration Statement” shall mean any registration statement that covers the Registrable Securities pursuant to the provisions of this
Agreement, including the Prospectus included in such registration statement, amendments (including post-effective amendments) and supplements to such registration statement, and all exhibits to and all material incorporated by reference in such
registration statement. 
 “Requesting Holder” shall have the meaning given in subsection 2.1.1. 

“Securities Act” shall mean the Securities Act of 1933, as amended from time to time. 

“Sponsor” shall have the meaning given in the Preamble hereto. 

“Underwriter” shall mean a securities dealer who purchases any Registrable Securities as principal in an Underwritten Offering and not as
part of such dealer’s market-making activities. 
 “Underwritten Registration” or “Underwritten Offering” shall mean
a Registration in which securities of the Company are sold to an Underwriter in a firm commitment underwriting for distribution to the public. 

“Working Capital Warrants” shall have the meaning given in the Recitals hereto. 

ARTICLE II. 

REGISTRATIONS 
 2.1
Demand Registration. 
 2.1.1 Request for Registration. Subject to the provisions of subsection 2.1.4 and
Section 2.4 hereof, at any time and from time to time on or after the date the Company consummates the initial Business Combination, the Holders of at least a majority in interest of the then outstanding number of
Registrable Securities (the “Demanding Holders”) may make a written demand for Registration of all or part of their Registrable Securities, which written demand shall describe the amount and type of securities to be included in such
Registration and the intended method(s) of distribution thereof (such written demand a “Demand Registration”). The Company shall, within ten (10) days of the Company’s receipt of the Demand Registration, notify, in
writing, all other Holders of Registrable Securities of such demand, and each Holder of Registrable Securities who thereafter wishes to include all or a portion of such Holder’s Registrable Securities in a Registration pursuant to a Demand
Registration (each such Holder that includes all or a portion of such Holder’s Registrable Securities in such Registration, a “Requesting Holder”) shall so notify the Company, in writing, within five (5) days after the
receipt by the Holder of the notice from the Company. Upon receipt by the Company of any such written notification from a Requesting Holder(s) to the Company, such Requesting Holder(s) shall be entitled to have their Registrable Securities included
in a Registration pursuant to a Demand Registration and the Company shall effect, as soon thereafter as practicable, the 

  
 5 













 
Registration of all Registrable Securities requested by the Demanding Holders and Requesting Holders pursuant to such Demand Registration, including by filing a Registration Statement relating
thereto as soon as practicable, but not more than forty-five (45) days immediately after the Company’s receipt of the Demand Registration. Under no circumstances shall the Company be obligated to effect more than an aggregate of three
(3) Registrations pursuant to a Demand Registration under this subsection 2.1.1 with respect to any or all Registrable Securities; provided, however, that a Registration shall not be counted for such purposes unless a Form S-1 or any similar long-form registration statement that may be available at such time (“Form S-1”) has become effective and all of the Registrable Securities
requested by the Requesting Holders to be registered on behalf of the Requesting Holders in such Form S-1 Registration have been sold, in accordance with Section 3.1 of this
Agreement. 
 2.1.2 Effective Registration. Notwithstanding the provisions of subsection 2.1.1 above or any other part of this
Agreement, a Registration pursuant to a Demand Registration shall not count as a Registration unless and until (i) the Registration Statement filed with the Commission with respect to a Registration pursuant to a Demand Registration has been
declared effective by the Commission and (ii) the Company has complied with all of its obligations under this Agreement with respect thereto; provided, further, that if, after such Registration Statement has been declared
effective, an offering of Registrable Securities in a Registration pursuant to a Demand Registration is subsequently interfered with by any stop order or injunction of the Commission, federal or state court or any other governmental agency, the
Registration Statement with respect to such Registration shall be deemed not to have been declared effective, unless and until, (i) such stop order or injunction is removed, rescinded or otherwise terminated, and (ii) a majority-in-interest of the Demanding Holders initiating such Demand Registration thereafter affirmatively elect to continue with such Registration and accordingly notify the
Company in writing, but in no event later than five (5) days, of such election; provided, further, that the Company shall not be obligated or required to file another Registration Statement until the Registration Statement that
has been previously filed with respect to a Registration pursuant to a Demand Registration becomes effective or is subsequently terminated. 

2.1.3 Underwritten Offering. Subject to the provisions of subsection 2.1.4 and Section 2.4 hereof, if a
majority-in-interest of the Demanding Holders so advise the Company as part of their Demand Registration that the offering of the Registrable Securities pursuant to such
Demand Registration shall be in the form of an Underwritten Offering, then the right of such Demanding Holder or Requesting Holder (if any) to include its Registrable Securities in such Registration shall be conditioned upon such Holder’s
participation in such Underwritten Offering and the inclusion of such Holder’s Registrable Securities in such Underwritten Offering to the extent provided herein. All such Holders proposing to distribute their Registrable Securities through an
Underwritten Offering under this subsection 2.1.3 shall enter into an underwriting agreement in customary form with the Underwriter(s) selected for such Underwritten Offering by the majority-in-interest of the Demanding Holders initiating the Demand Registration. 
 2.1.4
Reduction of Underwritten Offering. If the managing Underwriter or Underwriters in an Underwritten Registration pursuant to a Demand Registration, in good faith, advises the Company, the Demanding Holders and the Requesting Holders (if any)
in writing that the dollar amount or number of Registrable Securities that the Demanding Holders and the Requesting Holders (if any) desire to sell, taken together with all other Common Stock or other


  
 6 













 
equity securities that the Company desires to sell and the Common Stock, if any, as to which a Registration has been requested pursuant to separate written contractual piggy-back registration
rights held by any other stockholders who desire to sell, exceeds the maximum dollar amount or maximum number of equity securities that can be sold in the Underwritten Offering without adversely affecting the proposed offering price, the timing, the
distribution method, or the probability of success of such offering (such maximum dollar amount or maximum number of such securities, as applicable, the “Maximum Number of Securities”), then the Company shall include in such
Underwritten Offering, as follows: (i) first, the Registrable Securities of the Demanding Holders and the Requesting Holders (if any) (pro rata based on the respective number of Registrable Securities that each Demanding Holder and Requesting
Holder (if any) has requested be included in such Underwritten Registration and the aggregate number of Registrable Securities that the Demanding Holders and Requesting Holders have requested be included in such Underwritten Registration) that can
be sold without exceeding the Maximum Number of Securities; (ii) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (i), the Registrable Securities of Holders (pro rata, based on the
respective number of Registrable Securities that each Holder has so requested) exercising their rights to register their Registrable Securities pursuant to subsection 2.2.1 hereof, without exceeding the Maximum Number of Securities; and
(iii) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i) and (ii), the Common Stock or other equity securities that the Company desires to sell, which can be sold without
exceeding the Maximum Number of Securities; and (iv) fourth, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i), (ii) and (iii), the Common Stock or other equity securities of other persons
or entities that the Company is obligated to register in a Registration pursuant to separate written contractual arrangements with such persons and that can be sold without exceeding the Maximum Number of Securities. 

2.1.5 Demand Registration Withdrawal. A
majority-in-interest of the Demanding Holders initiating a Demand Registration or a
majority-in-interest of the Requesting Holders (if any), pursuant to a Registration under subsection 2.1.1 shall have the right to withdraw from a Registration
pursuant to such Demand Registration for any or no reason whatsoever upon written notification to the Company and the Underwriter or Underwriters (if any) of their intention to withdraw from such Registration prior to the effectiveness of the
Registration Statement filed with the Commission with respect to the Registration of their Registrable Securities pursuant to such Demand Registration. Notwithstanding anything to the contrary in this Agreement, (i) the Company may effect any
Underwritten Registration pursuant to any then effective Registration Statement, including a Form S-3, that is then available for such offering and (ii) the Company shall be responsible for the
Registration Expenses incurred in connection with a Registration pursuant to a Demand Registration prior to its withdrawal under this subsection 2.1.5. 

2.2 Piggyback Registration. 

2.2.1 Piggyback Rights. If, at any time on or after the date the Company consummates the initial Business Combination, the Company
proposes to file a Registration Statement under the Securities Act with respect to an offering of equity securities, or securities or other obligations exercisable or exchangeable for, or convertible into equity securities, for its own account or
for the account of stockholders of the Company (or by the Company and by the stockholders of the Company including, without limitation, pursuant to Section 2.1 hereof), other


  
 7 













 
than a Registration Statement (i) filed in connection with any employee stock option or other benefit plan, (ii) for an exchange offer or offering of securities solely to the
Company’s existing stockholders, (iii) for an offering of debt that is convertible into equity securities of the Company or (iv) for a dividend reinvestment plan, then the Company shall give written notice of such proposed filing to
all of the Holders of Registrable Securities as soon as practicable but not less than ten (10) days before the anticipated filing date of such Registration Statement, which notice shall (A) describe the amount and type of securities to be
included in such offering, the intended method(s) of distribution, and the name of the proposed managing Underwriter or Underwriters, if any, in such offering, and (B) offer to all of the Holders of Registrable Securities the opportunity to
register the sale of such number of Registrable Securities as such Holders may request in writing within five (5) days after receipt of such written notice (such Registration a “Piggyback Registration”). The Company shall, in
good faith, cause such Registrable Securities to be included in such Piggyback Registration and shall use its best efforts to cause the managing Underwriter or Underwriters of a proposed Underwritten Offering to permit the Registrable Securities
requested by the Holders pursuant to this subsection 2.2.1 to be included in a Piggyback Registration on the same terms and conditions as any similar securities of the Company included in such Registration and to permit the sale or other
disposition of such Registrable Securities in accordance with the intended method(s) of distribution thereof. All such Holders proposing to distribute their Registrable Securities through an Underwritten Offering under this subsection 2.2.1
shall enter into an underwriting agreement in customary form with the Underwriter(s) selected for such Underwritten Offering by the Company. 

2.2.2 Reduction of Piggyback Registration. If the managing Underwriter or Underwriters in an Underwritten Registration that is to be a
Piggyback Registration, in good faith, advises the Company and the Holders of Registrable Securities participating in the Piggyback Registration in writing that the dollar amount or number of the Common Stock that the Company desires to sell, taken
together with (i) the Common Stock, if any, as to which Registration has been demanded pursuant to separate written contractual arrangements with persons or entities other than the Holders of Registrable Securities hereunder (ii) the
Registrable Securities as to which registration has been requested pursuant to Section 2.2 hereof, and (iii) the Common Stock, if any, as to which Registration has been requested pursuant to separate written
contractual piggy-back registration rights of other stockholders of the Company, exceeds the Maximum Number of Securities, then: 

(a) If the Registration is undertaken for the Company’s account, the Company shall include in any such Registration
(A) first, the Common Stock or other equity securities that the Company desires to sell, which can be sold without exceeding the Maximum Number of Securities; (B) second, to the extent that the Maximum Number of Securities has not been
reached under the foregoing clause (A), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to subsection 2.2.1 hereof, pro rata, based on the respective number of Registrable
Securities that each Holder has so requested, which can be sold without exceeding the Maximum Number of Securities; and (C) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A) and
(B), the Common Stock, if any, as to which Registration has been requested pursuant to written contractual piggy-back registration rights of other stockholders of the Company, which can be sold without exceeding the Maximum Number of Securities;


  
 8 













 (b) If the Registration is pursuant to a request by persons or entities
other than the Holders of Registrable Securities, then the Company shall include in any such Registration (A) first, the Common Stock or other equity securities, if any, of such requesting persons or entities, other than the Holders of
Registrable Securities, which can be sold without exceeding the Maximum Number of Securities; (B) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (A), the Registrable Securities of
Holders exercising their rights to register their Registrable Securities pursuant to subsection 2.2.1, pro rata, based on the respective number of Registrable Securities that each Holder has requested be included in such Underwritten
Registration and the aggregate number of Registrable Securities that the Holders have requested to be included in such Underwritten Registration, which can be sold without exceeding the Maximum Number of Securities; (C) third, to the extent
that the Maximum Number of Securities has not been reached under the foregoing clauses (A) and (B), the Common Stock or other equity securities that the Company desires to sell, which can be sold without exceeding the Maximum Number of
Securities; and (D) fourth, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A), (B) and (C), the Common Stock or other equity securities for the account of other persons or entities that the
Company is obligated to register pursuant to separate written contractual arrangements with such persons or entities, which can be sold without exceeding the Maximum Number of Securities. 

2.2.3 Piggyback Registration Withdrawal. Any Holder of Registrable Securities shall have the right to withdraw from a Piggyback
Registration for any or no reason whatsoever upon written notification to the Company and the Underwriter or Underwriters (if any) of his, her or its intention to withdraw from such Piggyback Registration prior to the effectiveness of the
Registration Statement filed with the Commission with respect to such Piggyback Registration (or in the case of an Underwritten Registration pursuant to Rule 415 under the Securities Act, at least two business days prior to the time of pricing of
the applicable offering). The Company (whether on its own good faith determination or as the result of a request for withdrawal by persons pursuant to separate written contractual obligations) may withdraw a Registration Statement filed with the
Commission in connection with a Piggyback Registration at any time prior to the effectiveness of such Registration Statement. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the Registration Expenses
incurred in connection with the Piggyback Registration prior to its withdrawal under this subsection 2.2.3. 
 2.2.4 Unlimited
Piggyback Registration Rights. For purposes of clarity, any Registration effected pursuant to Section 2.2 hereof shall not be counted as a Registration pursuant to a Demand Registration effected under
Section 2.1 hereof. 
 2.3 Registrations on Form S-3. The
Holders of Registrable Securities may at any time, and from time to time, request in writing that the Company, pursuant to Rule 415 under the Securities Act (or any successor rule promulgated thereafter by the Commission), register the resale of any
or all of their Registrable Securities on Form S-3 or any similar short-form registration statement that may be available at such time (“Form S-3”);
provided, however, that the Company shall not be obligated to effect such request through an Underwritten Offering. Within five (5) days of the Company’s receipt of a written request from a Holder or Holders of


  
 9 













 
Registrable Securities for a Registration on Form S-3, the Company shall promptly give written notice of the proposed Registration on Form S-3 to all other Holders of Registrable Securities, and each Holder of Registrable Securities who thereafter wishes to include all or a portion of such Holder’s Registrable Securities in such Registration on
Form S-3 shall so notify the Company, in writing, within ten (10) days after the receipt by the Holder of the notice from the Company. As soon as practicable thereafter, but not more than twelve
(12) days after the Company’s initial receipt of such written request for a Registration on Form S-3, the Company shall file a Registration Statement relating to all or such portion of such
Holder’s Registrable Securities as are specified in such written request, together with all or such portion of Registrable Securities of any other Holder or Holders joining in such request as are specified in the written notification given by
such Holder or Holders; provided, however, that the Company shall not be obligated to effect any such Registration pursuant to Section 2.3 hereof if (i) a Form S-3
is not available for such offering; or (ii) the Holders of Registrable Securities, together with the Holders of any other equity securities of the Company entitled to inclusion in such Registration, propose to sell the Registrable Securities
and such other equity securities (if any) at any aggregate price to the public of less than $5,000,000. 
 2.4 Restrictions on
Registration Rights. If (A) during the period starting with the date sixty (60) days prior to the Company’s good faith estimate of the date of the filing of, and ending on a date one hundred and twenty (120) days after
the effective date of, a Company initiated Registration and provided that the Company has delivered written notice to the Holders prior to receipt of a Demand Registration pursuant to subsection 2.1.1 and it continues to actively
employ, in good faith, all reasonable efforts to cause the applicable Registration Statement to become effective; (B) the Holders have requested an Underwritten Registration and the Company and the Holders are unable to obtain the commitment of
underwriters to firmly underwrite the offer; or (C) in the good faith judgment of the Board such Registration would be seriously detrimental to the Company and the Board concludes as a result that it is essential to defer the filing of such
Registration Statement at such time, then in each case the Company shall furnish to such Holders a certificate signed by the Chairman of the Board (or, if applicable, any Co-Chairman of the Board), the Chief
Executive Officer, the Chief Financial Officer, the President or the Secretary of the Company stating that in the good faith judgment of the Board it would be seriously detrimental to the Company for such Registration Statement to be filed in the
near future and that it is therefore essential to defer the filing of such Registration Statement. In such event, the Company shall have the right to defer such filing for a period of not more than thirty (30) days; provided,
however, that the Company shall not defer its obligation in this manner more than once in any 12-month period. 

ARTICLE III. 

COMPANY PROCEDURES 

3.1 General Procedures. If at any time on or after the date the Company consummates the initial Business Combination, the Company
is required to effect the Registration of Registrable Securities, the Company shall use its best efforts to effect such Registration to permit the sale of such Registrable Securities in accordance with the intended plan of distribution thereof, and
pursuant thereto the Company shall, as expeditiously as possible: 
 3.1.1 prepare and file with the Commission as soon as practicable a
Registration Statement with respect to such Registrable Securities and use its best efforts to cause such Registration Statement to become effective and remain effective until all Registrable Securities covered by such Registration Statement have
been sold; 

  
 10 













 3.1.2 prepare and file with the Commission such amendments and post-effective amendments to
the Registration Statement, and such supplements to the Prospectus, as may be reasonably requested by the majority-in-interest of the Holders with Registrable Securities
registered on such Registration Statement or any Underwriter of Registrable Securities or as may be required by the rules, regulations or instructions applicable to the registration form used by the Company or by the Securities Act or rules and
regulations thereunder to keep the Registration Statement effective until all Registrable Securities covered by such Registration Statement are sold in accordance with the intended plan of distribution set forth in such Registration Statement or
supplement to the Prospectus; 
 3.1.3 prior to filing a Registration Statement or Prospectus, or any amendment or supplement thereto,
furnish without charge to the Underwriters, if any, and the Holders of Registrable Securities included in such Registration, and such Holders’ legal counsel, copies of such Registration Statement as proposed to be filed, each amendment and
supplement to such Registration Statement (in each case including all exhibits thereto and documents incorporated by reference therein), the Prospectus included in such Registration Statement (including each preliminary Prospectus), and such other
documents as the Underwriters and the Holders of Registrable Securities included in such Registration or the legal counsel for any such Holders may request in order to facilitate the disposition of the Registrable Securities owned by such Holders;

 3.1.4 prior to any public offering of Registrable Securities, use its best efforts to (i) register or qualify the Registrable
Securities covered by the Registration Statement under such securities or “blue sky” laws of such jurisdictions in the United States as the Holders of Registrable Securities included in such Registration Statement (in light of their
intended plan of distribution) may request and (ii) take such action necessary to cause such Registrable Securities covered by the Registration Statement to be registered with or approved by such other governmental authorities as may be
necessary by virtue of the business and operations of the Company and do any and all other acts and things that may be necessary or advisable to enable the Holders of Registrable Securities included in such Registration Statement to consummate the
disposition of such Registrable Securities in such jurisdictions; provided, however, that the Company shall not be required to qualify generally to do business in any jurisdiction where it would not otherwise be required to qualify or
take any action to which it would be subject to general service of process or taxation in any such jurisdiction where it is not then otherwise so subject; 

3.1.5 cause all such Registrable Securities to be listed on each securities exchange or automated quotation system on which similar securities
issued by the Company are then listed; 
 3.1.6 provide a transfer agent or warrant agent, as applicable, and registrar for all such
Registrable Securities no later than the effective date of such Registration Statement; 

  
 11 













 3.1.7 advise each seller of such Registrable Securities, promptly after it shall receive
notice or obtain knowledge thereof, of the issuance of any stop order by the Commission suspending the effectiveness of such Registration Statement or the initiation or threatening of any proceeding for such purpose and promptly use its reasonable
best efforts to prevent the issuance of any stop order or to obtain its withdrawal if such stop order should be issued; 
 3.1.8 at least
five (5) days prior to the filing of any Registration Statement or Prospectus or any amendment or supplement to such Registration Statement or Prospectus, furnish a copy thereof to each seller of such Registrable Securities or its counsel; 

3.1.9 notify the Holders at any time when a Prospectus relating to such Registration Statement is required to be delivered under the Securities
Act, of the happening of any event as a result of which the Prospectus included in such Registration Statement, as then in effect, includes a Misstatement, and then to correct such Misstatement as set forth in Section 3.4
hereof; 
 3.1.10 permit a representative of the Holders, the Underwriters, if any, and any attorney or accountant retained by such Holders
or Underwriter to participate, at each such person’s own expense, in the preparation of the Registration Statement, and cause the Company’s officers, directors and employees to supply all information reasonably requested by any such
representative, Underwriter, attorney or accountant in connection with the Registration; provided, however, that such representatives or Underwriters enter into a confidentiality agreement, in form and substance reasonably satisfactory
to the Company, prior to the release or disclosure of any such information; 
 3.1.11 obtain a “cold comfort” letter from the
Company’s independent registered public accountants in the event of an Underwritten Registration, in customary form and covering such matters of the type customarily covered by “cold comfort” letters as the managing Underwriter may
reasonably request, and reasonably satisfactory to a majority-in-interest of the participating Holders; 

3.1.12 on the date the Registrable Securities are delivered for sale pursuant to such Registration, obtain an opinion, dated such date, of
counsel representing the Company for the purposes of such Registration, addressed to the Holders, the placement agent or sales agent, if any, and the Underwriters, if any, covering such legal matters with respect to the Registration in respect of
which such opinion is being given as the Holders, placement agent, sales agent, or Underwriter may reasonably request and as are customarily included in such opinions and negative assurance letters, and reasonably satisfactory to a majority in
interest of the participating Holders; 
 3.1.13 in the event of any Underwritten Offering, enter into and perform its obligations under an
underwriting agreement, in usual and customary form, with the managing Underwriter of such offering; 
 3.1.14 make available to its security
holders, as soon as reasonably practicable, an earnings statement covering the period of at least twelve (12) months beginning with the first day of the Company’s first full calendar quarter after the effective date of the Registration
Statement which satisfies the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder (or any successor rule promulgated thereafter by the Commission); 

  
 12 













 3.1.15 if the Registration involves the Registration of Registrable Securities involving
gross proceeds in excess of $25,000,000, use its reasonable efforts to make available senior executives of the Company to participate in customary “road show” presentations that may be reasonably requested by the Underwriter in any
Underwritten Offering; and 
 3.1.16 otherwise, in good faith, cooperate reasonably with, and take such customary actions as may reasonably
be requested by the Holders, in connection with such Registration. 
 3.2 Registration Expenses. The Registration Expenses of
all Registrations shall be borne by the Company. It is acknowledged by the Holders that the Holders shall bear all incremental selling expenses relating to the sale of Registrable Securities, such as Underwriters’ commissions and discounts,
brokerage fees, Underwriter marketing costs and, other than as set forth in the definition of “Registration Expenses,” all reasonable fees and expenses of any legal counsel representing the Holders. 

3.3 Requirements for Participation in Underwritten Offerings. No person may participate in any Underwritten Offering for equity
securities of the Company pursuant to a Registration initiated by the Company hereunder unless such person (i) agrees to sell such person’s securities on the basis provided in any underwriting arrangements approved by the Company and
(ii) completes and executes all customary questionnaires, powers of attorney, indemnities, lock-up agreements, underwriting agreements and other customary documents as may be reasonably required under the
terms of such underwriting arrangements. 
 3.4 Suspension of Sales; Adverse Disclosure. Upon receipt of written notice from
the Company that a Registration Statement or Prospectus contains a Misstatement, each of the Holders shall forthwith discontinue disposition of Registrable Securities until it has received copies of a supplemented or amended Prospectus correcting
the Misstatement (it being understood that the Company hereby covenants to prepare and file such supplement or amendment as soon as practicable after the time of such notice), or until it is advised in writing by the Company that the use of the
Prospectus may be resumed. If the filing, initial effectiveness or continued use of a Registration Statement in respect of any Registration at any time would require the Company to make an Adverse Disclosure or would require the inclusion in such
Registration Statement of financial statements that are unavailable to the Company for reasons beyond the Company’s control, the Company may, upon giving prompt written notice of such action to the Holders, delay the filing or initial
effectiveness of, or suspend use of, such Registration Statement for the shortest period of time, but in no event more than thirty (30) days, determined in good faith by the Company to be necessary for such purpose. In the event the Company
exercises its rights under the preceding sentence, the Holders agree to suspend, immediately upon their receipt of the notice referred to above, their use of the Prospectus relating to any Registration in connection with any sale or offer to sell
Registrable Securities. The Company shall immediately notify the Holders of the expiration of any period during which it exercised its rights under this Section 3.4. 

  
 13 













 3.5 Reporting Obligations. As long as any Holder shall own Registrable
Securities, the Company, at all times while it shall be a reporting company under the Exchange Act, covenants to file timely (or obtain extensions in respect thereof and file within the applicable grace period) all reports required to be filed by
the Company after the date hereof pursuant to Sections 13(a) or 15(d) of the Exchange Act and to promptly furnish the Holders with true and complete copies of all such filings. The Company further covenants that it shall take such further action as
any Holder may reasonably request, all to the extent required from time to time to enable such Holder to sell shares of the Common Stock held by such Holder without registration under the Securities Act within the limitation of the exemptions
provided by Rule 144 promulgated under the Securities Act (or any successor rule promulgated thereafter by the Commission), including providing any legal opinions. Upon the request of any Holder, the Company shall deliver to such Holder a written
certification of a duly authorized officer as to whether it has complied with such requirements. 
 ARTICLE IV. 

INDEMNIFICATION AND CONTRIBUTION 

4.1 Indemnification. 

4.1.1 The Company agrees to indemnify, to the extent permitted by law, each Holder of Registrable Securities, its officers and directors and
agents and each person who controls such Holder (within the meaning of the Securities Act) against all losses, claims, damages, liabilities and expenses (including, without limitation, reasonable attorneys’ fees) resulting from any untrue or
alleged untrue statement of material fact contained in any Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof or supplement thereto or any omission or alleged omission of a material fact required to be stated
therein or necessary to make the statements therein not misleading, except insofar as the same are caused by or contained in any information or affidavit so furnished in writing to the Company by such Holder expressly for use therein. The Company
shall indemnify the Underwriters, their officers and directors and each person who controls such Underwriters (within the meaning of the Securities Act) to the same extent as provided in the foregoing with respect to the indemnification of the
Holder. 
 4.1.2 In connection with any Registration Statement in which a Holder of Registrable Securities is participating, such Holder
shall furnish to the Company in writing such information and affidavits as the Company reasonably requests for use in connection with any such Registration Statement or Prospectus and, to the extent permitted by law, shall indemnify the Company, its
directors and officers and agents and each person who controls the Company (within the meaning of the Securities Act) against all losses, claims, damages, liabilities and expenses (including, without limitation’ reasonable attorneys’ fees)
resulting from any untrue or alleged untrue statement of material fact contained in any Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof or supplement thereto or any omission or alleged omission of a material
fact required to be stated therein or necessary to make the statements therein not misleading, but only to the extent that such untrue statement or omission is contained in any information or affidavit so furnished in writing by such Holder
expressly for use therein; provided, however, that the obligation to indemnify shall be several, not joint and several, among such Holders of Registrable Securities, and the liability of each such Holder of


  
 14 













 
Registrable Securities shall be in proportion to and limited to the net proceeds received by such Holder from the sale of Registrable Securities pursuant to such Registration Statement. The
Holders of Registrable Securities shall indemnify the Underwriters, their officers, directors and each person who controls such Underwriters (within the meaning of the Securities Act) to the same extent as provided in the foregoing with respect to
indemnification of the Company. 
 4.1.3 Any person entitled to indemnification herein shall (i) give prompt written notice to the
indemnifying party of any claim with respect to which it seeks indemnification (provided that the failure to give prompt notice shall not impair any person’s right to indemnification hereunder to the extent such failure has not materially
prejudiced the indemnifying party) and (ii) unless in such indemnified party’s reasonable judgment a conflict of interest between such indemnified and indemnifying parties may exist with respect to such claim, permit such indemnifying
party to assume the defense of such claim with counsel reasonably satisfactory to the indemnified party. If such defense is assumed, the indemnifying party shall not be subject to any liability for any settlement made by the indemnified party
without its consent (but such consent shall not be unreasonably withheld). An indemnifying party who is not entitled to, or elects not to, assume the defense of a claim shall not be obligated to pay the fees and expenses of more than one counsel for
all parties indemnified by such indemnifying party with respect to such claim, unless in the reasonable judgment of any indemnified party a conflict of interest may exist between such indemnified party and any other of such indemnified parties with
respect to such claim. No indemnifying party shall, without the consent of the indemnified party, consent to the entry of any judgment or enter into any settlement which cannot be settled in all respects by the payment of money (and such money is so
paid by the indemnifying party pursuant to the terms of such settlement) or which settlement does not include as an unconditional term thereof the giving by the claimant or plaintiff to such indemnified party of a release from all liability in
respect to such claim or litigation. 
 4.1.4 The indemnification provided for under this Agreement shall remain in full force and effect
regardless of any investigation made by or on behalf of the indemnified party or any officer, director or controlling person of such indemnified party and shall survive the transfer of securities. The Company and each Holder of Registrable
Securities participating in an offering also agrees to make such provisions as are reasonably requested by any indemnified party for contribution to such party in the event the Company’s or such Holder’s indemnification is unavailable for
any reason. 
 4.1.5 If the indemnification provided under Section 4.1 hereof from the indemnifying party is unavailable or insufficient
to hold harmless an indemnified party in respect of any losses, claims, damages, liabilities and expenses referred to herein, then the indemnifying party, in lieu of indemnifying the indemnified party, shall contribute to the amount paid or payable
by the indemnified party as a result of such losses, claims, damages, liabilities and expenses in such proportion as is appropriate to reflect the relative fault of the indemnifying party and the indemnified party, as well as any other relevant
equitable considerations. The relative fault of the indemnifying party and indemnified party shall be determined by reference to, among other things, whether any action in question, including any untrue or alleged untrue statement of a material fact
or omission or alleged omission to state a material fact, was made by, or relates to information supplied by, such indemnifying party or indemnified party, and the indemnifying party’s and indemnified party’s relative intent, knowledge,
access to information and opportunity 

  
 15 













 
to correct or prevent such action; provided, however, that the liability of any Holder under this subsection 4.1.5 shall be limited to the amount of the net proceeds received
by such Holder in such offering giving rise to such liability. The amount paid or payable by a party as a result of the losses or other liabilities referred to above shall be deemed to include, subject to the limitations set forth in subsections
4.1.1, 4.1.2 and 4.1.3 above, any legal or other fees, charges or expenses reasonably incurred by such party in connection with any investigation or proceeding. The parties hereto agree that it would not be just and equitable if
contribution pursuant to this subsection 4.1.5 were determined by pro rata allocation or by any other method of allocation, which does not take account of the equitable considerations referred to in this subsection 4.1.5. No person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution pursuant to this subsection 4.1.5 from any person who was not guilty of such
fraudulent misrepresentation. 
 ARTICLE V. 

MISCELLANEOUS 
 5.1
Notices. Any notice or communication under this Agreement must be in writing and given by (i) deposit in the United States mail, addressed to the party to be notified, postage prepaid and registered or certified with return
receipt requested, (ii) delivery in person or by courier service providing evidence of delivery, or (iii) transmission by hand delivery, electronic mail or facsimile. Each notice or communication that is mailed, delivered, or transmitted
in the manner described above shall be deemed sufficiently given, served, sent, and received, in the case of mailed notices, on the third business day following the date on which it is mailed and, in the case of notices delivered by courier service,
hand delivery, electronic mail or facsimile, at such time as it is delivered to the addressee (with the delivery receipt or the affidavit of messenger) or at such time as delivery is refused by the addressee upon presentation. Any notice or
communication under this Agreement must be addressed to the Company, 4301 50th Street NW, Suite 300 PMB 1044, Washington D.C. 20016, and, if to any Holder, at such Holder’s address or facsimile number as found in the Company’s books and
records. Any party may change its address for notice at any time and from time to time by written notice to the other parties hereto, and such change of address shall become effective thirty (30) days after delivery of such notice as provided
in this Section 5.1. 
 5.2 Assignment; No Third Party Beneficiaries. 

5.2.1 This Agreement and the rights, duties and obligations of the Company hereunder may not be assigned or delegated by the Company in whole
or in part. 
 5.2.2 Prior to the expiration of the Founder Shares Lock-up Period or the Private
Placement Lock-up Period, as the case may be, no Holder may assign or delegate such Holder’s rights, duties or obligations under this Agreement, in whole or in part, except in connection with a transfer
of Registrable Securities by such Holder to a Permitted Transferee but only if such Permitted Transferee agrees to become bound by the transfer restrictions set forth in this Agreement, the Warrant Agreement or any other applicable letter agreements
between the Company and such Holder. 

  
 16 













 5.2.3 This Agreement and the provisions hereof shall be binding upon and shall inure to the
benefit of each of the parties and its successors and the permitted assigns of the Holders, which shall include Permitted Transferees. 

5.2.4 This Agreement shall not confer any rights or benefits on any persons that are not parties hereto, other than as expressly set forth in
this Agreement and Section 5.2 hereof. 
 5.2.5 No assignment by any party hereto of such party’s rights,
duties and obligations hereunder shall be binding upon or obligate the Company unless and until the Company shall have received (i) written notice of such assignment as provided in Section 5.1 hereof and (ii) the
written agreement of the assignee, in a form reasonably satisfactory to the Company, to be bound by the terms and provisions of this Agreement (which may be accomplished by an addendum or certificate of joinder to this Agreement). Any transfer or
assignment made other than as provided in this Section 5.2 shall be null and void. 
 5.3
Severability. This Agreement shall be deemed severable, and the invalidity or unenforceability of any term or provision hereof shall not affect the validity or enforceability of this Agreement or of any other term or provision hereof.
Furthermore, in lieu of any such invalid or unenforceable term or provision, the parties hereto intend that there shall be added as a part of this Agreement a provision as similar in terms to such invalid or unenforceable provision as may be
possible that is valid and enforceable. 
 5.4 Counterparts. This Agreement may be executed in multiple counterparts (including
facsimile or PDF counterparts), each of which shall be deemed an original, and all of which together shall constitute the same instrument, but only one of which need be produced. 

5.5 Governing Law; Venue. NOTWITHSTANDING THE PLACE WHERE THIS AGREEMENT MAY BE EXECUTED BY ANY OF THE PARTIES HERETO, THE
PARTIES EXPRESSLY AGREE THAT (I) THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED UNDER THE LAWS OF THE STATE OF NEW YORK, INCLUDING, WITHOUT LIMITATION, SECTIONS 5-1401 AND 5-1402 OF THE NEW YORK GENERAL OBLIGATIONS LAW AND NEW YORK CIVIL PRACTICE LAWS AND RULES 327(B), AS APPLIED TO AGREEMENTS AMONG NEW YORK RESIDENTS ENTERED INTO AND TO BE PERFORMED ENTIRELY WITHIN NEW YORK AND
(II) THE VENUE FOR ANY ACTION TAKEN WITH RESPECT TO THIS AGREEMENT SHALL BE ANY STATE OR FEDERAL COURT IN NEW YORK COUNTY IN THE STATE OF NEW YORK. 

5.6 Entire Agreement. This Agreement (including all agreements entered into pursuant hereto and all certificates and instruments
delivered pursuant hereto and thereto) constitute the entire agreement of the parties with respect to the subject matter hereof and supersede all prior and contemporaneous agreements, representations, understandings, negotiations and discussions
between the parties, whether oral or written. 
 5.7 Amendments and Modifications. Upon the written consent of the Company and
the Holders of at least a majority in interest of the Registrable Securities at the time in question, compliance with any of the provisions, covenants and conditions set forth in this Agreement may be waived, or any of such provisions, covenants or
conditions may be amended or modified; 

  
 17 













 
provided, however, that notwithstanding the foregoing, any amendment hereto or waiver hereof that adversely affects one Holder, solely in its capacity as a holder of the shares of
capital stock of the Company, in a manner that is materially different from the other Holders (in such capacity) shall require the consent of the Holder so affected. No course of dealing between any Holder or the Company and any other party hereto
or any failure or delay on the part of a Holder or the Company in exercising any rights or remedies under this Agreement shall operate as a waiver of any rights or remedies of any Holder or the Company. No single or partial exercise of any rights or
remedies under this Agreement by a party shall operate as a waiver or preclude the exercise of any other rights or remedies hereunder or thereunder by such party. 

5.8 Titles and Headings. Titles and headings of sections of this Agreement are for convenience only and shall not affect the
construction of any provision of this Agreement. 
 5.9 Waivers and Extensions. Any party to this Agreement may waive any
right, breach or default which such party has the right to waive, provided that such waiver will not be effective against the waiving party unless it is in writing, is signed by such party, and specifically refers to this Agreement. Waivers may be
made in advance or after the right waived has arisen or the breach or default waived has occurred. Any waiver may be conditional. No waiver of any breach of any agreement or provision herein contained shall be deemed a waiver of any preceding or
succeeding breach thereof nor of any other agreement or provision herein contained. No waiver or extension of time for performance of any obligations or acts shall be deemed a waiver or extension of the time for performance of any other obligations
or acts. 
 5.10 Remedies Cumulative. In the event that the Company fails to observe or perform any covenant or agreement to be
observed or performed under this Agreement, the Holders may proceed to protect and enforce its rights by suit in equity or action at law, whether for specific performance of any term contained in this Agreement or for an injunction against the
breach of any such term or in aid of the exercise of any power granted in this Agreement or to enforce any other legal or equitable right, or to take any one or more of such actions, without being required to post a bond. None of the rights, powers
or remedies conferred under this Agreement shall be mutually exclusive, and each such right, power or remedy shall be cumulative and in addition to any other right, power or remedy, whether conferred by this Agreement or now or hereafter available
at law, in equity, by statute or otherwise. 
 5.11 Term. This Agreement shall terminate upon the earlier of (i) the tenth
anniversary of the date of this Agreement or (ii) the date as of which (A) all of the Registrable Securities have been sold pursuant to a Registration Statement (but in no event prior to the applicable period referred to in
Section 4(a)(3) of the Securities Act and Rule 174 thereunder) or (B) the Holders of all Registrable Securities are permitted to sell the Registrable Securities without registration pursuant to Rule 144 promulgated under the Securities Act
(but with no volume or other restrictions or limitations). The provisions of Section 3.5 and Article IV shall survive any termination. 

[SIGNATURE PAGES FOLLOW] 

  
 18 













 IN WITNESS WHEREOF, the undersigned have caused this Agreement to be executed as of the date
first written above. 
  

					
	COMPANY:
	
	SUPERNOVA PARTNERS ACQUISITION COMPANY, INC., a Delaware corporation
		
	By:	 	  

		 	Name:	 	Michael Clifton
		 	Title:	 	Chief Financial Officer
	
	HOLDERS:
	
	SUPERNOVA PARTNERS LLC, a Delaware limited liability company
		
	By:	 	  

		 	Name:	 	Michael Clifton
		 	Title:	 	Chief Financial Officer