Document:

EX-10.2

 Exhibit 10.2 

Final Version 
 FORM OF
SUBSCRIPTION AGREEMENT 
 This SUBSCRIPTION AGREEMENT (this “Subscription Agreement”) is entered into as of
March 17, 2021 by and between Supernova Partners Acquisition Company, Inc., a Delaware corporation (the “Issuer”), and the undersigned (“Subscriber”). Defined terms used but not otherwise defined herein
shall have the respective meanings ascribed thereto in the Merger Agreement (as defined below). 
 WHEREAS, the Issuer, OfferPad, Inc.,
a Delaware corporation (“OfferPad”), Orchids Merger Sub, Inc., a Delaware corporation (“First Merger Sub”) and Orchids Merger Sub, LLC, a Delaware limited liability company (“Second Merger Sub”)
are entering into that certain Agreement and Plan of Merger, dated as of the date hereof (as amended, modified, supplemented or waived from time to time in accordance with its terms, the “Merger Agreement”), pursuant to which,
inter alia, (i) First Merger Sub will be merged with and into OfferPad (the “First Merger”), with OfferPad surviving the First Merger and (ii) immediately following the First Merger, Offerpad will be merged with and
into Second Merger Sub (the “Second Merger”), with Second Merger Sub surviving the Second Merger as a wholly owned subsidiary of the Issuer, on the terms and subject to the conditions set forth therein (the “Merger”
and, together with the other transactions contemplated by the Merger Agreement, the “Transactions”); 
 WHEREAS, in
connection with the Transactions, Subscriber desires to subscribe for and purchase from the Issuer the number of shares of the Issuer’s Class A Common Stock, par value $0.0001 per share (the “Class A Common
Stock”), set forth on Subscriber’s signature page hereto (the “Shares”) for a purchase price of $10.00 per share (the “Per Share Price”) and an aggregate purchase price as set forth on
Subscriber’s signature page hereto (the “Purchase Price”), and the Issuer desires to issue and sell to Subscriber the Shares in consideration of the payment of the Purchase Price therefor by or on behalf of Subscriber to the
Issuer, all on the terms and conditions set forth herein; and 
 WHEREAS, certain other investors (each, other than Supernova Partners LLC
and its affiliates (collectively, the “Sponsor”) an “Other Subscriber”) are entering into separate subscription agreements with the Issuer (each, an “Other Subscription Agreement”), pursuant to
which such investors have agreed or will agree to purchase Class A Common Stock at the Per Share Price (collectively with the Shares to be purchased hereunder, the “PIPE Securities”) on the Closing Date (as defined below) for a
total aggregate investment of $200,000,000; 
 NOW, THEREFORE, in consideration of the foregoing and the mutual representations, warranties
and covenants, and subject to the conditions, herein contained, and intending to be legally bound hereby, the parties hereto hereby agree as follows: 

For ease of administration, this single Subscription Agreement is being executed so as to enable each Subscriber identified on the signature
page to enter into a Subscription Agreement, severally, but not jointly. The parties agree that (i) the Subscription Agreement shall be treated as if it were a separate agreement with respect to each Subscriber listed on the signature
page, as if each Subscriber entity had executed a separate Subscription Agreement naming only itself as Subscriber, and (ii) no Subscriber listed on the signature page shall have any liability under the Subscription Agreement for the
obligations of any other Subscriber so listed. 
 1. Subscription. Subject to the terms and conditions hereof, at the Closing (as
defined below), Subscriber hereby agrees to subscribe for and purchase, and the Issuer hereby agrees to issue and sell to Subscriber, upon the payment of the Purchase Price, the Shares (such subscription and issuance, the
“Subscription”). 
 2. Representations, Warranties and Agreements. 

2.1. Subscriber’s Representations, Warranties and Agreements. To induce the Issuer to issue the Shares to
Subscriber, Subscriber hereby represents and warrants to the Issuer and acknowledges and agrees with the Issuer as follows: 

 2.1.1. If Subscriber is not an individual, Subscriber has been duly formed
or incorporated and is validly existing in good standing under the laws of its jurisdiction of incorporation or formation, with power and authority to enter into, deliver and perform its obligations under this Subscription Agreement. If Subscriber
is an individual, Subscriber has the authority to enter into, deliver and perform its obligations under this Subscription Agreement. 

2.1.2. If Subscriber is not an individual, this Subscription Agreement has been duly authorized, validly executed and delivered
by Subscriber. If Subscriber is an individual, the signature on this Subscription Agreement is genuine, and Subscriber has legal competence and capacity to execute the same. Assuming that this Subscription Agreement constitutes the valid and binding
agreement of the Issuer, this Subscription Agreement is the valid and binding obligation of Subscriber and is enforceable against Subscriber in accordance with its terms, except as may be limited or otherwise affected by (i) bankruptcy,
insolvency, fraudulent conveyance, reorganization, moratorium or other laws relating to or affecting the rights of creditors generally, and (ii) principles of equity, whether considered at law or equity. 

2.1.3. The execution, delivery and performance by Subscriber of this Subscription Agreement and the consummation of the
transactions contemplated herein do not and will not (i) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, or result in the creation or imposition of any lien, charge or
encumbrance upon any of the property or assets of Subscriber or any of its subsidiaries pursuant to the terms of any indenture, mortgage, deed of trust, loan agreement, lease, license or other agreement or instrument to which Subscriber or any of
its subsidiaries is a party or by which Subscriber or any of its subsidiaries is bound or to which any of the property or assets of Subscriber or any of its subsidiaries is subject, which would reasonably be expected to have a material adverse
effect on the legal authority or ability of Subscriber to enter into or timely perform its obligations under this Subscription Agreement (a “Subscriber Material Adverse Effect”), (ii) if Subscriber is not an individual, result
in any breach or violation of the provisions of the organizational documents of Subscriber or any of its subsidiaries or (iii) result in any violation of any statute or any judgment, order, rule or regulation of any court or Governmental
Authority, domestic or foreign, having jurisdiction over Subscriber or, if applicable, any of its subsidiaries or any of their respective properties that would reasonably be expected to have a Subscriber Material Adverse Effect. 

2.1.4. Subscriber (i) is a “qualified institutional buyer” (as defined in Rule 144A under the Securities
Act of 1933, as amended (the “Securities Act”)) or an “accredited investor” (within the meaning of Rule 501(a)(1), (2), (3), (5), (6), (7) or (9) under the Securities Act) satisfying the applicable requirements set
forth on Schedule I hereto, (ii) is acquiring the Shares only for its own account and not for the account of others, or if Subscriber is subscribing for the Shares as a fiduciary or agent for one or more investor accounts, each owner of
such account is a qualified institutional buyer, and Subscriber has full investment discretion with respect to each such account, and the full power and authority to make the acknowledgements, representations, warranties and agreements herein on
behalf of each owner of each such account and (iii) is not acquiring the Shares with a view to, or for offer or sale in connection with, any distribution thereof in violation of the Securities Act (and shall provide the requested information on
Schedule I hereto). If Subscriber is not an individual, Subscriber is not an entity formed for the specific purpose of acquiring the Shares. 

2.1.5. Subscriber understands that the Shares are being offered in a transaction not involving any public offering within the
meaning of the Securities Act and that the Shares have not been registered under the Securities Act. Subscriber understands that the Shares may not be resold, transferred, pledged or otherwise disposed of by Subscriber absent an effective
registration statement under the Securities Act, except (i) to the Issuer or a subsidiary thereof, (ii) to non-U.S. persons pursuant to offers and sales that occur solely outside the United States
within the meaning of Regulation S under the Securities Act or (iii) pursuant to another applicable exemption from the registration requirements of the Securities Act, and in each of cases (i) and (iii), in accordance with any applicable
securities laws of the states and other jurisdictions of the United States, and that any certificates representing the Shares shall contain a legend, or each register for the Shares in book entry form shall contain a notation, to such effect.
Subscriber acknowledges that the Shares will not be eligible for resale pursuant to Rule 144A promulgated under the Securities Act. Subscriber acknowledges and agrees that the Shares will not be eligible for offer, resale, transfer, pledge or
disposition pursuant to Rule 144 promulgated under the Securities Act until at 

  
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least one year from the date that the Issuer files a Current Report on Form 8-K following the Closing Date that includes the “Form 10”
information required under applicable SEC rules and regulations. Subscriber understands and agrees that the Shares will be subject to the foregoing transfer restrictions and, as a result of these transfer restrictions, Subscriber may not be able to
readily resell the Shares and may be required to bear the financial risk of an investment in the Shares for an indefinite period of time. Subscriber understands that it has been advised to consult legal counsel prior to making any offer, resale,
pledge or transfer of any of the Shares. 
 2.1.6. Subscriber understands and agrees that Subscriber is purchasing the Shares
directly from the Issuer. Subscriber further acknowledges that there have not been, and Subscriber hereby agrees that it is not relying on, any representations, warranties, covenants or agreements made to Subscriber by J.P. Morgan Securities LLC or
Jefferies LLC (together, the “Placement Agents”), the Issuer, OfferPad, or any of their respective affiliates or any control persons, officers, directors, partners, agents or representatives, any other party to the Transactions or
any other person or entity, expressly or by implication, other than those representations, warranties, covenants and agreements expressly set forth in this Subscription Agreement. 

2.1.7. Subscriber’s acquisition and holding of the Shares will not constitute or result in a non-exempt prohibited transaction under Section 406 of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), Section 4975 of the Internal Revenue Code of 1986, as
amended (the “Code”), or any applicable similar law. 
 2.1.8. In making its decision to purchase the
Shares, Subscriber has relied solely upon independent investigation made by Subscriber and the Issuer’s representations, warranties and agreements herein. Without limiting the generality of the foregoing, Subscriber has not relied on any
statements or other information provided by anyone other than the Issuer and its representatives concerning the Issuer or the Shares or the offer and sale of the Shares. Subscriber acknowledges and agrees that Subscriber has received access to, and
has had an adequate opportunity to review, such information as Subscriber deems necessary in order to make an investment decision with respect to the Shares, including with respect to the Issuer, OfferPad and the Transactions, and made its own
assessment and is satisfied concerning the relevant tax and other economic considerations relevant to Subscriber’s investment in the Shares. Without limiting the generality of the foregoing, Subscriber acknowledges that, as the Subscriber deems
necessary, it has reviewed (i) the Issuer’s filings with the Securities and Exchange Commission (the “Commission”) and (ii) a presentation with respect to OfferPad provided to Subscriber by the Issuer (the
“Target Disclosure”). Subscriber represents and agrees that Subscriber and Subscriber’s professional advisor(s), if any, have had the full opportunity to ask such questions, receive such answers and obtain such information as
Subscriber and such Subscriber’s professional advisor(s), if any, have deemed necessary to make an investment decision with respect to the Shares. Subscriber acknowledges and agrees that (i) neither of the Placement Agents, nor any
affiliate of the Placement Agents, has provided Subscriber with any information or advice with respect to the Shares nor is such information or advice necessary or desired and (ii) neither of the Placement Agents nor any of their respective
affiliates has prepared any disclosure or offering document in connection with the offer and sale of the Shares. Neither of the Placement Agents nor any of their respective affiliates has made or makes any representation as to the Issuer, OfferPad
or the quality or value of the Shares and the Placement Agents and any of their respective affiliates may have acquired non-public information with respect to the Issuer or OfferPad which Subscriber agrees
need not be provided to it. In connection with the issuance of the Shares to Subscriber and the purchase of the Shares by Subscriber, neither of the Placement Agents nor any of their respective affiliates has acted as a financial advisor or
fiduciary to Subscriber. Subscriber acknowledges that neither of the Placement Agents shall have any liability or any obligation to the Subscriber in respect of this Subscription Agreement or the transactions contemplated hereby including, but not
limited to, any action heretofore or hereafter taken or omitted to be taken by any of them in connection with the Subscriber’s purchase of the Shares. The Subscriber hereby understands and acknowledges that none of the Placement Agents, nor any
of their respective affiliates, nor any control persons, officers, directors, employees, agents or representatives of any of the foregoing has made any independent investigation with respect to the Issuer, OfferPad or its subsidiaries or any of
their respective businesses, or the Shares or the accuracy, completeness or adequacy of any information supplied to the Subscriber by the Issuer. 

  
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 2.1.9. Subscriber became aware of this offering of the Shares solely by
means of direct contact between Subscriber and the Issuer or its representatives, including the Placement Agents. Subscriber has a pre-existing substantive relationship (as interpreted in guidance from the
Commission under the Securities Act) with the Issuer or its representatives, and the Shares were offered to Subscriber solely by direct contact between Subscriber and the Issuer or its representatives. Subscriber did not become aware of this
offering of the Shares, nor were the Shares offered to Subscriber, by any other means. Subscriber acknowledges that the Issuer represents and warrants that the Shares (i) were not offered by any form of general solicitation or general
advertising, including methods described in Section 502(c) of Regulation D under the Securities Act and (ii) are not being offered in a manner involving a public offering under, or in a distribution in violation of, the Securities
Act, or any state securities laws. 
 2.1.10. Subscriber acknowledges that it is aware that there are substantial risks
incident to the purchase and ownership of the Shares. Subscriber has such knowledge and experience in financial and business matters as to be capable of evaluating the merits and risks of an investment in the Shares, and Subscriber has sought such
accounting, legal and tax advice as Subscriber has considered necessary to make an informed investment decision. Subscriber (i) if not an individual, is an institutional account as defined in FINRA Rule 4512(c), (ii) is a sophisticated
investor, experienced in investing in private equity transactions and capable of evaluating investment risks independently, both in general and with regard to all transactions and investment strategies involving a security or securities, and
(iii) has exercised independent judgment in evaluating its participation in the purchase of the Shares. If Subscriber is not an individual, Subscriber understands and acknowledges that the purchase and sale of the Shares hereunder meets
(i) the exemptions from filing under FINRA Rule 5123(b)(1)(A) and (ii) the institutional customer exemption under FINRA Rule 2111(b). 

2.1.11. Alone, or together with any professional advisor(s), Subscriber has adequately analyzed and fully considered the risks
of an investment in the Shares and determined that the Shares are a suitable investment for Subscriber and that Subscriber is able at this time and in the foreseeable future to bear the economic risk of a total loss of Subscriber’s investment
in the Issuer. Subscriber acknowledges specifically that a possibility of total loss exists. 
 2.1.12. Subscriber
understands and agrees that no federal or state agency has passed upon or endorsed the merits of the offering of the Shares or made any findings or determination as to the fairness of an investment in the Shares. 

2.1.13. Subscriber is not (i) a person or entity named on the List of Specially Designated Nationals and Blocked Persons
administered by the U.S. Treasury Department’s Office of Foreign Assets Control (“OFAC”) or in any Executive Order issued by the President of the United States and administered by OFAC (“OFAC List”), or a
person or entity prohibited by any OFAC sanctions program, (ii) a Designated National as defined in the Cuban Assets Control Regulations, 31 C.F.R. Part 515 or (iii) a non-U.S. shell bank or
providing banking services indirectly to a non-U.S. shell bank. Subscriber agrees to provide law enforcement agencies, if requested thereby, such records as required by applicable law, provided that
Subscriber is permitted to do so under applicable laws. If Subscriber is a financial institution subject to the Bank Secrecy Act (31 U.S.C. Section 5311 et seq.), as amended by the USA PATRIOT Act of 2001, and its implementing regulations
(collectively, the “BSA/PATRIOT Act”), that Subscriber, directly or indirectly through a third-party administrator, maintains policies and procedures reasonably designed to comply with applicable obligations under the BSA/PATRIOT
Act. To the extent required, Subscriber, directly or indirectly through a third-party administrator, maintains policies and procedures reasonably designed for the screening of its investors against the OFAC sanctions programs, including the OFAC
List. Subscriber further represents and warrants that, to the extent required, it, directly or indirectly through a third-party administrator, maintains policies and procedures reasonably designed to ensure that the funds held by Subscriber and used
to purchase the Shares were legally derived. 

  
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 2.1.14. If Subscriber is an employee benefit plan that is subject to Title I
of ERISA, a plan, an individual retirement account or other arrangement that is subject to Section 4975 of the Code or an employee benefit plan that is a governmental plan (as defined in Section 3(32) of ERISA), a church plan (as defined
in Section 3(33) of ERISA), a non-U.S. plan (as described in Section 4(b)(4) of ERISA) or other plan that is not subject to the foregoing but may be subject to provisions under any other
federal, state, local, non-U.S. or other laws or regulations that are similar to such provisions of ERISA or the Code, or an entity whose underlying assets are considered to include “plan assets” of
any such plan, account or arrangement (each, a “Plan”) subject to the fiduciary or prohibited transaction provisions of ERISA or Section 4975 of the Code, Subscriber represents and warrants that it has not relied on the Issuer
or any of its affiliates (the “Transaction Parties”) for investment advice as the Plan’s fiduciary with respect to its decision to acquire and hold the Shares, and none of the Transaction Parties shall at any time be relied
upon as the Plan’s fiduciary with respect to any decision to acquire, continue to hold or transfer the Shares. 

2.1.15. [Reserved.] 

2.1.16. No foreign person (as defined in 31 C.F.R. Part 800.224) in which the national or subnational governments of a single
foreign state have a substantial interest (as defined in 31 C.F.R. Part 800.244) will acquire a substantial interest in the Issuer as a result of the purchase and sale of Shares hereunder such that a declaration to the Committee on Foreign
Investment in the United States would be mandatory under 31 C.F.R. Part 800.401, and no foreign person will have control (as defined in 31 C.F.R. Part 800.208) over the Issuer from and after the Closing as a result of the purchase and sale of Shares
hereunder. 
 2.1.17. On the date the Purchase Price would be required to be funded to the Issuer pursuant to
Section 3.1 Subscriber will have, sufficient immediately available funds to pay the Purchase Price pursuant to Section 3.1. Subscriber was not formed for the purpose of acquiring the Shares. 

2.1.18. [Reserved.] 

2.1.19. If applicable, Subscriber represents that no disqualifying event described in Rule 506(d)(1)(i)-(viii) under the
Securities Act (a “Disqualification Event”) is applicable to Subscriber or any of its Rule 506(d) Related Parties (as defined below), except, if applicable, for a Disqualification Event as to which Rule 506(d)(2)(ii) or
(iii) or (d)(3) is applicable. Subscriber hereby agrees that it shall notify the Issuer promptly in writing in the event a Disqualification Event becomes applicable to Subscriber or any of its Rule 506(d) Related Parties, except, if applicable,
for a Disqualification Event as to which Rule 506(d)(2)(ii) or (iii) or (d)(3) is applicable. For purposes of this Section 2.1.19, “Rule 506(d) Related Party” shall mean a person or entity that is a direct
beneficial owner of Subscriber’s securities for purposes of Rule 506(d) under the Securities Act. 
 2.1.20. No broker,
finder or other financial consultant has acted on behalf of Subscriber in connection with this Subscription Agreement or the transactions contemplated hereby in such a way as to create any liability on the Issuer. 

2.1.21. If Subscriber is an individual, then Subscriber resides in the state or province identified in the address of
Subscriber set forth on the signature page hereto. If Subscriber is not an individual, then the office or offices of Subscriber where its principal place of business is located is identified in the address or addresses of Subscriber set forth on the
signature page hereto. 
 2.1.22. If Subscriber is an individual, Subscriber hereby understands and acknowledges that neither
J.P. Morgan Securities LLC, Jefferies LLC, nor any of their respective affiliates is acting as a placement agent in connection with the offer and sale of the Shares to Subscriber. 

2.1.23. The Subscriber has not paid, and is not obligated to pay, any brokerage, finder or other commission or similar fee in
connection with the issuance and sale of the Shares. 

  
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 2.1.24. If Subscriber is a resident or subject to the laws of Canada,
Subscriber hereby declares, represents, warrants and agrees as set forth in the attached Schedule II. 
 2.2. Issuer’s
Representations, Warranties and Agreements. To induce Subscriber to purchase the Shares, the Issuer hereby represents and warrants to Subscriber and agrees with Subscriber as follows: 

2.2.1. The Issuer has been duly incorporated and is validly existing as a corporation in good standing under the Delaware
General Corporation Law (the “DGCL”), with corporate power and authority to own, lease and operate its properties and conduct its business as presently conducted and to enter into, deliver and perform its obligations under this
Subscription Agreement. 
 2.2.2. The Shares have been duly authorized and, when issued and delivered to Subscriber against
full payment for the Shares in accordance with the terms of this Subscription Agreement and registered with the Issuer’s transfer agent, the Shares will be validly issued, fully paid and non-assessable,
free and clear of all liens or other restrictions (other than those arising under applicable securities laws) and will not have been issued in violation of or subject to any preemptive or similar rights created under the Issuer’s organizational
documents or under the DGCL, or pursuant to any agreement or other instrument to which the Issuer is a party or by which it is otherwise bound. 

2.2.3. This Subscription Agreement has been duly authorized, validly executed and delivered by the Issuer and, assuming that
this Subscription Agreement constitutes the valid and binding obligation of Subscriber, is the valid and binding obligation of the Issuer and is enforceable against the Issuer in accordance with its terms, except as may be limited or otherwise
affected by (i) bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium or other laws relating to or affecting the rights of creditors generally and (ii) principles of equity, whether considered at law or equity. 

2.2.4. The execution, delivery and performance by the Issuer of this Subscription Agreement, issuance and sale of the Shares
and the consummation of the certain other transactions contemplated herein will not (i) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, or result in the creation or
imposition of any lien, charge or encumbrance upon any of the property or assets of the Issuer or any of its subsidiaries pursuant to the terms of any indenture, mortgage, deed of trust, loan agreement, lease, license or other agreement or
instrument to which the Issuer or any of its subsidiaries is a party or by which the Issuer or any of its subsidiaries is bound or to which any of the property or assets of the Issuer or any of its subsidiaries is subject, which would reasonably be
expected to have a material adverse effect on the business, properties, financial condition, stockholders’ equity or results of operations of the Issuer or to have a material adverse effect on the legal authority or ability of the Issuer to
enter into or timely perform its obligations under this Subscription Agreement (an “Issuer Material Adverse Effect”), (ii) result in any breach or violation of the provisions of the organizational documents of the Issuer or any
of its subsidiaries or (iii) result in any violation of any statute or any judgment, order, rule or regulation of any court or Governmental Authority, domestic or foreign, having jurisdiction over the Issuer or any of its subsidiaries or
any of their respective properties that would reasonably be expected to have an Issuer Material Adverse Effect. 
 2.2.5.
Neither the Issuer, nor any person acting on its behalf has, directly or indirectly, made any offers or sales of any Issuer security or solicited any offers to buy any Issuer security under circumstances that would adversely affect reliance by the
Issuer on Section 4(a)(2) of the Securities Act for the exemption from registration under the Securities Act of the Shares to be issued as contemplated hereby. 

2.2.6. Neither the Issuer nor any person acting on its behalf has conducted any general solicitation or general advertising,
including methods described in Section 502(c) of Regulation D under the Securities Act, in connection with the offer or sale of any of the Shares and neither the Issuer nor any person acting on its behalf offered any of the Shares in a
manner involving a public offering under, or in a distribution in violation of, the Securities Act or any state securities laws. 

  
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 2.2.7. Concurrently with the execution and delivery of this Subscription
Agreement, the Issuer is entering into the Other Subscription Agreements providing for the sale of certain PIPE Securities. Neither Issuer nor any of its affiliates has entered into any side letter agreements or other agreements or understandings
(including written summaries of any oral understandings) with any Other Subscriber or any other investor in connection with such Other Subscriber’s or investor’s direct or indirect investment in the Issuer, other than (a) Other
Subscription Agreements, (b) the Merger Agreement and (c) the Forward Purchase Agreements (as defined below). The Other Subscription Agreements reflect the same Per Share Price and terms and conditions that are not more advantageous to any
Other Subscriber thereunder than the terms and condition hereunder (other than terms particular to the regulatory requirements of such Subscriber or its affiliates or related funds). The Other Subscription Agreements have not been amended in any
material respect following the date of this Subscription Agreement. 
 2.2.8. The authorized capital stock of the Issuer as
of the date of this Subscription Agreement consists of 121,000,000 shares of capital stock as follows: (a) 100,000,000 shares of Class A Common Stock, (b) 20,000,000 shares of Class B common stock, par value $0.0001 per share
(“Authorized Class B Shares”); and (c) 1,000,000 shares of preferred stock, par value $0.0001 per share (“Authorized Preferred Shares”). On October 23, 2020, the Issuer entered into
Forward Purchase Agreements (the “Forward Purchase Agreements”) with certain affiliates of the Sponsor (the “Forward Purchasers”) pursuant to which the Forward Purchasers agreed to buy 5,000,000 shares of
Class A Common Stock, plus an aggregate of 1,666,667 warrants to purchase one share of Class A Common Stock, for an aggregate purchase price of $50.0 million, subject to termination by mutual agreement. As of the date hereof, and as
of immediately prior to the completion of the Transactions (prior to giving effect to (x) any redemption of any Class A Common Stock held by the Issuer’s public shareholders in connection with the consummation of the Transactions and
(y) the issuance of the PIPE Securities): (i) no Preferred Shares are and will be issued and outstanding; (ii) 40,250,000 shares of Class A Common Stock are and will be issued and outstanding; (iii) 10,062,500 Authorized
Class B Shares are and will be issued and outstanding; (iv) 6,700,000 warrants to purchase an aggregate of 6,700,000 shares of Class A Common Stock (the “Private Placement Warrants”) are and will be outstanding; and
(v) 13,416,666.7 warrants to purchase an aggregate of 13,416,666.7 shares of Class A Common Stock (the “Public Warrants”) are and will be outstanding. All (i) issued and outstanding shares of Class A Common Stock
and issued and outstanding Authorized Class B Shares have been duly authorized and validly issued, are fully paid and are non-assessable and are not subject to preemptive rights and (ii) outstanding
Private Placement Warrants and Public Warrants have been duly authorized and validly issued, are fully paid and are not subject to preemptive rights. Except as set forth above and pursuant to any Forward Purchase Agreements, Other Subscription
Agreements and the Merger Agreement, there are no outstanding options, warrants or other rights to subscribe for, purchase or acquire from the Issuer any shares of Class A Common Stock or Class B common stock, or any other equity interests
in the Issuer, or securities convertible into or exchangeable or exercisable for such equity interests. Other than First Merger Sub and Second Merger Sub, the Issuer has no subsidiaries and does not own, directly or indirectly, interests or
investments (whether equity or debt) in any person, whether incorporated or unincorporated. There are no stockholder agreements, voting trusts or other agreements or understandings to which the Issuer is a party or by which it is bound relating to
the voting of any securities of the Issuer, other than (A) as set forth in the SEC Documents (as defined below) and (B) as contemplated by the Merger Agreement and the other Transaction Agreements. 

2.2.9. Assuming the accuracy of Subscriber’s representations and warranties set forth in
Section 2.1 of this Subscription Agreement, (x) no registration under the Securities Act is required for the offer and sale of the Shares by the Issuer to Subscriber contemplated by this Subscription Agreement and
(y) no consent, approval, order or authorization of, or registration, qualification, designation, declaration or filing with, any federal, state or local Governmental Authority is required on the part of the Issuer in connection with such offer
and sale of Shares contemplated by this Subscription Agreement, except for filings pursuant to Regulation D of the Securities Act and applicable state securities laws. 

2.2.10. The Issuer has made available to Subscriber (including via the Commission’s EDGAR system) a true, correct and
complete copy of each form, report, statement, schedule, prospectus, proxy, registration statement and other documents filed by the Issuer with the Commission prior to the date of this Subscription Agreement (the “SEC Documents”),
which SEC Documents, complied in all material respects with the requirements of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) 

  
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applicable to the SEC Documents and the rules and regulations of the Commission promulgated thereunder applicable to the SEC Documents. Each of the financial statements (including, in each case,
any notes thereto) contained in the SEC Documents was prepared in accordance with U.S. generally accepted accounting principles applied on a consistent basis throughout the periods indicated (except as may be indicated in the notes thereto or, in
the case of unaudited statements, as permitted by Form 10-Q of the Commission) and each fairly presents, in all material respects, the financial position, results of operations and cash flows of the Issuer as
at the respective dates thereof and for the respective periods indicated therein. None of the SEC Documents filed under the Exchange Act, contained, when filed or, if amended prior to the date of this Subscription Agreement, as of the date of such
amendment with respect to those disclosures that are amended, any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading. The Issuer has timely filed each report, statement, schedule, prospectus, and registration statement that the Issuer was required to file with the Commission since its inception and through the date hereof.
There are no material outstanding or unresolved comments in comment letters from the Commission staff with respect to any of the SEC Documents. 

2.2.11. There are no pending or, to the knowledge of the Issuer, threatened, Actions, which, if determined adversely, would,
individually or in the aggregate, reasonably be expected to have an Issuer Material Adverse Effect. There is no unsatisfied judgment or any open injunction binding upon the Issuer which would, individually or in the aggregate, reasonably be expected
to have an Issuer Material Adverse Effect. 
 2.2.12. Except for the Placement Agents, the Issuer has not paid, and is not
obligated to pay, any brokerage, finder or other commission or similar fee in connection with the issuance and sale of the Shares. 

2.2.13. The Issuer is in compliance with all applicable laws, except where such
non-compliance would not, individually or in the aggregate, reasonably be expected to have an Issuer Material Adverse Effect. The Issuer has not received any written communication that alleges that the Issuer
is not in compliance with, or is in default or violation of, any applicable law, except where such non-compliance, default or violation would not, individually or in the aggregate, be reasonably expected to
have an Issuer Material Adverse Effect. 
 2.2.14. The issued and outstanding shares of the Issuer’s Class A Common
Stock are registered pursuant to Section 12(b) of the Exchange Act and are listed for trading on the New York Stock Exchange (the “NYSE”) under the symbol “SPNV.” The Issuer is in compliance in all material respects
with the rules of the NYSE and there is no Action pending or, to the knowledge of the Issuer, threatened against the Issuer by the NYSE or the Commission with respect to any intention by such entity to deregister the Issuer’s Class A
Common Stock or terminate the listing of the Issuer’s common stock on the NYSE. None of the Issuer or its affiliates has taken any action in an attempt to terminate the registration of the Issuer’s Class A Common Stock under the
Exchange Act except as contemplated by the Merger Agreement. The Issuer has not received any notice from the NYSE or the Commission regarding the revocation of such listing or otherwise regarding the delisting of the Issuer’s Class A
Common Stock from the NYSE or the Commission. 
 2.2.15. There are no securities or instruments issued by or to which the
Issuer is a party containing anti-dilution or similar provisions that will be triggered by the issuance of (i) the Shares or (ii) the shares of Class A Common Stock to be issued pursuant to any Other Subscription Agreement. 

2.2.16. Neither the Issuer nor any of its subsidiaries is an “investment company” within the meaning of the
Investment Company Act of 1940, as amended. 

  
 8 

 2.2.17. Issuer acknowledges and agrees that, notwithstanding anything herein
to the contrary, the Shares may be pledged by Subscriber in connection with a bona fide margin agreement, which shall not be deemed to be a transfer, sale or assignment of the Shares hereunder, and Issuer effecting a pledge of Shares shall not be
required to provide Issuer with any notice thereof or otherwise make any delivery to Issuer pursuant to this Subscription Agreement. Issuer hereby agrees to execute and deliver such documentation as a pledgee of the Shares may reasonably request in
connection with a pledge of the Shares to such pledgee by Subscriber. 
 3. Settlement Date and Delivery. 

3.1. Closing. The closing of the Subscription contemplated hereby (the “Closing”) shall occur immediately prior to, or
substantially concurrently with, the consummation of the Transactions (the “Closing Date”). Upon written notice from (or on behalf of) the Issuer to Subscriber (the “Closing Notice”) at least five (5) Business
Days prior to the date that the Issuer reasonably expects the closing of the Transactions to occur (the “Expected Closing Date”), Subscriber shall deliver to the Issuer no later than two (2) Business Days prior to the Closing,
the Purchase Price for the Shares, by wire transfer of United States dollars in immediately available funds to the account specified by the Issuer in the Closing Notice, such funds to be held by the Issuer in escrow until the Closing. If
(i) the Subscription Agreement terminates following the delivery by Subscriber of the Purchase Price for the Shares or the Transactions are not consummated on or prior to the second (2nd) Business Day after the Expected Closing Date, the Issuer
shall promptly (but no later than two (2) Business Days thereafter) return the Purchase Price to Subscriber, without any deduction for or on account of any tax withholding, charges or set-off, by wire
transfer of United States dollars in immediately available funds to an account specified by Subscriber. Notwithstanding the immediately preceding sentence, (i) a failure to close on or within two (2) Business Days after the Expected
Closing Date shall not, by itself, be deemed to be a failure of any of the conditions to Closing set forth in Sections 3.2 and 3.3 to be satisfied or waived on or prior to the Closing Date, and (ii) Subscriber
shall remain obligated to consummate the Closing upon satisfaction of the conditions set forth in Sections 3.2 and 3.3. At the Closing, upon satisfaction (or, if applicable, waiver) of the conditions set forth in
Sections 3.2 and 3.3, the Issuer shall deliver to Subscriber the Shares in book entry form in the name of Subscriber (or its nominee in accordance with its delivery instructions) or to a custodian designated by
Subscriber, as applicable. For purposes of this Subscription Agreement, “Business Day” means a day other than a Saturday, Sunday or any other day on which commercial banks in New York, New York are authorized or required by Law to close.
Each register and book entry for the Shares shall contain a notation with a legend substantially to the effect described in Section 2.1.5 hereof. 

3.2. Conditions to Closing of the Issuer. 

The Issuer’s obligations to sell and issue the Shares at the Closing are subject to the fulfillment or waiver by Issuer, on or prior to
the Closing Date, of each of the following conditions: 
 3.2.1. Representations and Warranties Correct. The
representations and warranties made by Subscriber in Section 2.1 hereof (i) shall be true and correct in all material respects when made (other than representations and warranties that are qualified as to materiality
or Subscriber Material Adverse Effect, which representations and warranties shall be true and correct in all respects), and (ii) shall be true and correct in all material respects on and as of the Closing Date, unless they specifically speak as
of another date in which case they shall be true and correct in all material respects as of such date (in each case, other than representations and warranties that are qualified as to materiality or Subscriber Material Adverse Effect, which
representations and warranties shall be true in all respects) with the same force and effect as if they had been made on and as of said date. 

3.2.2. Compliance with Covenants. Subscriber shall have performed, satisfied and complied in all material respects with
the covenants, agreements and conditions required by this Subscription Agreement to be performed, satisfied or complied with by Subscriber at or prior to the Closing, provided, that this condition shall be deemed satisfied unless written notice of
such non-compliance is provided by Issuer to the Subscriber, and the Subscriber fails to cure such non-compliance in all material respects within ten (10) Business
Days of receipt of such notice. 
 3.2.3. Closing of the Transactions. All conditions precedent to the Issuer’s
obligations to consummate, or cause to be consummated, the Transactions set forth in the Merger Agreement shall have been satisfied (as determined by the parties to the Merger Agreement) or waived by the party entitled to the benefit thereof under
the Merger Agreement (other than those conditions that may only be satisfied at the consummation of the Transactions, but subject to satisfaction (as determined by the parties to the Merger Agreement) or waiver by such party of such conditions as of
the consummation of the Transactions), and such Transactions are consummated substantially concurrently with the Closing. 

  
 9 

 3.2.4. Legality. There shall not be in force any order, judgment or
injunction entered by or with any Governmental Authority enjoining or prohibiting the issuance and sale of the Shares under this Subscription Agreement. 

3.3. Conditions to Closing of Subscriber. 

Subscriber’s obligation to purchase the Shares at the Closing is subject to the fulfillment or waiver by Subscriber, on or prior to the
Closing Date, of each of the following conditions: 
 3.3.1. Representations and Warranties Correct. The
representations and warranties made by the Issuer in Section 2.2 hereof (i) shall be true and correct in all material respects when made (other than representations and warranties that are qualified as to materiality
or Issuer Material Adverse Effect, which representations and warranties shall be true and correct in all respects), and (ii) shall be true and correct in all material respects on and as of the Closing Date, unless they specifically speak as of
another date in which case they shall be true and correct in all material respects as of such date (in each case, other than representations and warranties that are qualified as to materiality or Issuer Material Adverse Effect, which representations
and warranties shall be true in all respects) with the same force and effect as if they had been made on and as of said date, but in each case without giving effect to consummation of the Transactions. 

3.3.2. Compliance with Covenants. The Issuer shall have performed, satisfied and complied in all material respects with
the covenants, agreements and conditions required by this Subscription Agreement to be performed, satisfied or complied with by the Issuer at or prior to the Closing. 

3.3.3. Closing of the Transactions. (i) All conditions precedent to the consummation of the Transactions set forth
in the Merger Agreement shall have been satisfied (as determined by the parties to the Merger Agreement) or waived by the party entitled to the benefit thereof under the Merger Agreement (other than those conditions that may only be satisfied at the
consummation of the Transactions, but subject to satisfaction (as determined by the parties to the Merger Agreement) or waiver by such party of such conditions as of the consummation of the Transactions) and (ii) no amendment or modification
of, or waiver under the Merger Agreement shall have occurred that would reasonably be expected to materially and adversely affect the economic benefits to Subscriber under this Subscription Agreement without having received Subscriber’s prior
written consent. 
 3.3.4. Legality. There shall not be in force any order, judgment or injunction entered by or with
any Governmental Authority enjoining or prohibiting the issuance and sale of the Shares under this Subscription Agreement, and no Governmental Authority shall have instituted or threatened in writing a proceeding seeking to impose any such
injunction or prohibition. 
 3.3.5. Listing. The Shares shall have been approved for listing on the NYSE. 

4. Registration Rights Agreement. 

4.1. The Issuer agrees that, within 30 calendar days after the consummation of the Transactions (the “Filing Deadline”), the
Issuer will file with the Commission (at the Issuer’s sole cost and expense) a registration statement (the “Registration Statement”) registering the resale of the Shares, including additional shares issued pursuant to any stock
split, stock dividend or similar transaction (the “Registrable Securities”), and the Issuer shall use its commercially reasonable efforts to have the Registration Statement declared effective as soon as practicable after the
consummation of the Transactions, but no later than the earlier of (i) the 65th calendar day (or 90th calendar day if the Commission notifies the Issuer that it will “review” the Registration Statement) following the consummation of
the Transactions and (ii) the 5th Business Day after the date the Issuer is 

  
 10 

 
notified (orally or in writing, whichever is earlier) by the Commission that the Registration Statement will not be “reviewed” or will not be subject to further review (such earlier
date, the “Effectiveness Date”); provided, however, that if the Commission is closed for operations due to a government shutdown, the Effectiveness Date shall be extended by the same amount of days that the Commission
remains closed for operations; provided, further, that the Issuer’s obligations to include the Registrable Securities in the Registration Statement are contingent upon Subscriber furnishing a completed and executed selling
shareholder questionnaire in customary form to the Issuer that contains the information required by Commission rules for a Registration Statement regarding Subscriber, the securities of the Issuer held by Subscriber and the intended method of
disposition of the Registrable Securities to effect the registration of the Registrable Securities, and Subscriber shall execute such documents in connection with such registration as the Issuer may reasonably request that are customary of a selling
stockholder in similar situations, including providing that the Issuer shall be entitled to postpone and suspend the effectiveness or use of the Registration Statement as permitted hereunder. For the avoidance of doubt, the Subscriber shall not in
connection with the foregoing be required to execute any lock-up or similar agreement or otherwise be subject to any contractual restriction on the ability to transfer the Registrable Securities. Subscriber
agrees to disclose its beneficial ownership, as determined in accordance with Rule 13d-3 of the Exchange Act, of Shares to the Issuer (or its successor) upon request to assist the Issuer in making the
determination described above. The Issuer shall provide a draft of the Registration Statement to Subscriber for review at least two (2) Business Days in advance of the date of filing the Registration Statement with the Commission (the
“Filing Date”), and Subscriber shall provide any comments on the Registration Statement to the Issuer no later than the day immediately preceding the Filing Date. In no event shall Subscriber be identified as a statutory underwriter
in the Registration Statement unless requested by the Commission; provided, that if the Commission requests that Subscriber be identified as a statutory underwriter in the Registration Statement, Subscriber will have an opportunity to withdraw from
the Registration Statement. Notwithstanding the foregoing it is expressly understood that the Issuer shall include the following in the Registration Statement, “In offering the securities covered by this prospectus, the selling securityholders
may be deemed to be “underwriters” within the meaning of the Securities Act in connection with such sales.” The Issuer may amend the Registration Statement so as to convert the Registration Statement to a Registration Statement on
Form S-3 at such time after the Issuer becomes eligible to use such Form S-3. Notwithstanding the foregoing, if the Commission prevents the Issuer from including any or
all of the shares proposed to be registered under the Registration Statement due to limitations on the use of Rule 415 under the Securities Act for the resale of the shares of Class A Common Stock by the applicable stockholders or otherwise,
such Registration Statement shall register for resale such number of shares of Class A Common Stock which is equal to the maximum number of shares as is permitted to be registered by the Commission. In such event, the number of Registrable
Securities to be registered for each selling stockholder named in the Registration Statement shall be reduced pro rata among all such selling stockholders and as promptly as practicable after being permitted to register additional shares under Rule
415 under the Securities Act, the Issuer shall amend the Registration Statement or file a new Registration Statement to register such additional shares and cause such amendment or Registration Statement to become effective as promptly as
practicable. For purposes of clarification, any failure by the Issuer to file the Registration Statement by the Filing Deadline or to effect such Registration Statement by the Effectiveness Date shall not otherwise relieve the Issuer of its
obligations to file or effect the Registration Statement as set forth above in this Section 4. 
 4.2. In the case
of the registration effected by the Issuer pursuant to this Subscription Agreement, the Issuer shall, upon reasonable request, inform Subscriber as to the status of such registration. At its expense the Issuer shall: 

4.2.1. except for such times as the Issuer is permitted hereunder to suspend the use of the prospectus forming part of a
Registration Statement, use its commercially reasonable efforts to keep such registration, and any qualification, exemption or compliance under state securities laws which the Issuer determines to obtain, continuously effective with respect to
Subscriber, and to keep the applicable Registration Statement or any subsequent shelf registration statement free of any material misstatements or omissions through the date the earliest of (i) three (3) years from the date the initial
Registration Statement covering the Registrable Securities is declared effective, (ii) the date on which Subscriber no longer owns any Shares or (iii) the first date on which Subscriber can sell all of its Shares (or shares received in
exchange therefor) without any condition or limitation under Rule 144; the Issuer will remove the legend set forth in Section 2.1.5 upon a sale pursuant to an effective Registration Statement; 

  
 11 

 4.2.2. advise Subscriber within five (5) Business Days: 

(a) when a Registration Statement or any amendment thereto has been filed with the Commission and when a Registration Statement
or any post-effective amendment thereto has become effective; 
 (b) after it shall have received notice or obtained
knowledge thereof, of the issuance by the Commission of any stop order suspending the effectiveness of any Registration Statement or the initiation of any proceedings for such purpose; 

(c) of the receipt by the Issuer of any notification with respect to the suspension of the qualification of the Registrable
Securities included therein for sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose; and 

(d) subject to the provisions in this Subscription Agreement, of the occurrence of any event that requires the making of any
changes in any Registration Statement or prospectus so that, as of such date, the statements therein do not include any untrue statements of a material fact and do not omit to state a material fact required to be stated therein or necessary to make
the statements therein (in the case of a prospectus, in the light of the circumstances under which they were made) not misleading. 
 Notwithstanding
anything to the contrary set forth in this Section 4.2.2, the Issuer shall not, when so advising Subscriber of such events, provide Subscriber with any material, nonpublic information regarding the Issuer other than to the
extent that providing notice to Subscriber of the occurrence of the events listed in (a) through (d) above may constitute material, nonpublic information regarding the Issuer; 

4.2.3. use its commercially reasonable efforts to obtain the withdrawal of any order suspending the effectiveness of any
Registration Statement as soon as reasonably practicable; 
 4.2.4. upon the occurrence of any event contemplated in
Section 4.2.2(d), except for such times as the Issuer is permitted hereunder to suspend, and has suspended, the use of a prospectus forming part of a Registration Statement, the Issuer shall use its commercially reasonable
efforts to as soon as reasonably practicable prepare a post-effective amendment to such Registration Statement or a supplement to the related prospectus, or file any other required document so that, as thereafter delivered to purchasers of the
Registrable Securities included therein, such prospectus will not include any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were
made, not misleading; and 
 4.2.5. use its commercially reasonable efforts to cause all Shares to be listed on each
securities exchange or market, if any, on which the Issuer’s Class A Common Stock is then listed. 
 4.3. Notwithstanding anything
to the contrary in this Subscription Agreement, the Issuer shall be entitled to delay or postpone the effectiveness of the Registration Statement, and from time to time to require Subscriber not to sell under the Registration Statement or to suspend
the effectiveness thereof, if the filing, effectiveness or continued use of any Registration Statement would require the Issuer to make any public disclosure of material non-public information, which
disclosure, in the good faith determination of the board of directors of the Issuer, after consultation with external counsel to the Issuer, (a) would be required to be made in any Registration Statement in order for the applicable Registration
Statement not to contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements contained therein not misleading or to comply with applicable disclosure requirements, (b) would not be required
to be made at such time if the Registration Statement were not being filed, and (c) the Issuer has a bona fide business purpose for not making such information public (each such circumstance, a “Suspension Event”);
provided, however, that the Issuer may not delay or suspend the Registration Statement on more than two (2) occasions or for more than forty-five (45) consecutive calendar days, or more than ninety (90) total calendar
days, in each case during any twelve-month period. Upon receipt of any written notice from the Issuer of the happening of any Suspension Event (which notice shall not contain material non-public information)
during the period that the Registration Statement is effective or if as a result of a Suspension Event the Registration Statement or related prospectus contains any untrue statement of a material fact or omits to state any material fact required to
be stated therein or necessary to make the statements therein, in light of the circumstances 

  
 12 

 
under which they were made (in the case of the prospectus) not misleading, Subscriber agrees that (i) it will immediately discontinue offers and sales of the Shares under the Registration
Statement until Subscriber receives copies of a supplemental or amended prospectus (which the Issuer agrees to promptly prepare) that corrects the misstatement(s) or omission(s) referred to above and receives notice that any post-effective
amendment has become effective or unless otherwise notified by the Issuer that it may resume such offers and sales, and (ii) it will maintain the confidentiality of any information included in such written notice delivered by the Issuer except
(A) for disclosure to Subscriber’s employees, agents and professional advisers who need to know such information and are obligated to keep it confidential, (B) for disclosures to the extent required in order to comply with reporting
obligations to its limited partners who have agreed to keep such information confidential and (C) as required by law. If so directed by the Issuer, Subscriber will deliver to the Issuer or, in Subscriber’s sole discretion destroy, all
copies of the prospectus covering the Shares in Subscriber’s possession; provided, however, that this obligation to deliver or destroy all copies of the prospectus covering the Shares shall not apply (i) to the extent
Subscriber is required to retain a copy of such prospectus (a) in order to comply with applicable legal, regulatory, self-regulatory or professional requirements or (b) in accordance with a bona fide
pre-existing document retention policy or (ii) to copies stored electronically on archival servers as a result of automatic data back-up. 

4.4. Subscriber may deliver written notice (including via email in accordance with this Subscription Agreement) (an “Opt-Out Notice”) to the Issuer requesting that Subscriber not receive notices from the Issuer otherwise required by this Section 4; provided, however, that Subscriber
may later revoke any such Opt-Out Notice in writing. Following receipt of an Opt-Out Notice from Subscriber (unless subsequently revoked), (i) the Issuer shall not
deliver any such notices to Subscriber and Subscriber shall no longer be entitled to the rights associated with any such notice and (ii) each time prior to Subscriber’s intended use of an effective Registration Statement, Subscriber will
notify the Issuer in writing at least three (3) Business Days in advance of such intended use, and if a notice of a Suspension Event was previously delivered (or would have been delivered but for the provisions of this
Section 4.4) and the related suspension period remains in effect, the Issuer will so notify Subscriber, within one (1) Business Day of Subscriber’s notification to the Issuer, by delivering to Subscriber a copy of
such previous notice of Suspension Event, and thereafter will provide Subscriber with the related notice of the conclusion of such Suspension Event immediately upon its availability. 

4.5. The Issuer shall indemnify and hold harmless Subscriber (to the extent a seller under the Registration Statement), the officers,
directors, members, managers, partners, agents, investment advisors and employees of Subscriber, each person who controls Subscriber (within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act) and the
officers, directors, members, managers, partners, agents and employees of each such controlling person, to the fullest extent permitted by applicable law, from and against any and all losses, claims, damages, liabilities, costs (including, without
limitation, reasonable attorneys’ fees) and expenses (collectively, “Losses”) that arise out of or are based upon any untrue or alleged untrue statement of a material fact contained in the Registration Statement, any prospectus
included in the Registration Statement or any form of prospectus or in any amendment or supplement thereto or in any preliminary prospectus, or arising out of or relating to any omission or alleged omission to state a material fact required to be
stated therein or necessary to make the statements therein (in the case of any prospectus or form of prospectus or supplement thereto, in light of the circumstances under which they were made) not misleading, except to the extent that untrue
statements, alleged untrue statements, omissions or alleged omissions are based upon information regarding Subscriber furnished in writing to the Issuer by or on behalf of Subscriber expressly for use therein or Subscriber has omitted a material
fact from such information. The Issuer shall notify Subscriber promptly of the institution, threat or assertion of any proceeding arising from or in connection with the transactions contemplated by this Section 4 of which the Issuer is aware.
Such indemnity shall remain in full force and effect regardless of any investigation made by or on behalf of an indemnified party. Notwithstanding the forgoing, the Issuer’s indemnification obligations shall not apply to amounts paid in
settlement of any Losses or action if such settlement is effected without the prior written consent of the Issuer. 
 4.6. Subscriber shall,
severally and not jointly with any Other Subscriber in the offering contemplated by this Subscription Agreement or selling stockholder named in the Registration Statement, indemnify and hold harmless the Issuer, its directors, officers, agents and
employees, each person who controls the Issuer (within the meaning of Section 15 of the Securities Act and Section 20 of the Exchange Act), and the directors, officers, agents or employees of such controlling persons, to the fullest extent
permitted by applicable law, from and 

  
 13 

 
against all Losses arising out of or based upon any untrue or alleged untrue statement of a material fact contained in any Registration Statement, any prospectus included in the Registration
Statement, or any form of prospectus, or in any amendment or supplement thereto or in any preliminary prospectus, or arising out of or relating to any omission or alleged omission of a material fact required to be stated therein or necessary to make
the statements therein (in the case of any prospectus, or any form of prospectus or supplement thereto, in light of the circumstances under which they were made) not misleading to the extent, but only to the extent, that such untrue statements,
alleged untrue statements, omissions or alleged omissions are based upon information regarding Subscriber furnished in writing to the Issuer by or on behalf of Subscriber expressly for use therein. In no event shall the liability of Subscriber be
greater in amount than the dollar amount of the net proceeds received by Subscriber upon the sale of the Shares giving rise to such indemnification obligation. Notwithstanding the forgoing, Subscriber indemnification obligations shall not apply to
amounts paid in settlement of any Losses or action if such settlement is effected without the prior written consent of Subscriber. 
 4.7.
Any person or entity 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 or entity’s right to indemnification hereunder to the extent such failure has not 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, conditioned or delayed). 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), which settlement shall not include a
statement or admission of fault and culpability on the part of such indemnified party, and which settlement shall 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. 
 4.8. The indemnification provided for under this Subscription 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 or entity of such indemnified party and shall survive the transfer of securities. 

4.9. If the indemnification provided under this Section 4 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; provided, however, that the liability of Subscriber shall be limited to the net proceeds received by such Subscriber from the sale of Shares giving rise to such indemnification obligation. 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 not made by, in the case of an omission), or relates to information supplied by (or not supplied by, in the case of an omission), such indemnifying party or indemnified party, and the indemnifying party’s and indemnified party’s
relative intent, knowledge, access to information and opportunity to correct or prevent such action. 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 this Section 4, any legal or other fees, charges or expenses reasonably incurred by such party in connection with any investigation or proceeding. 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 Section 4.9 from any person or entity who was not guilty of such fraudulent misrepresentation. 

  
 14 

 5. Termination. This Subscription Agreement shall terminate and be void and of no
further force and effect, and all rights and obligations of the parties hereunder shall terminate without any further liability on the part of any party in respect thereof, upon the earliest to occur of (i) such date and time as the Merger
Agreement is terminated in accordance with its terms, (ii) the mutual written agreement of the Issuer and Subscriber to terminate this Subscription Agreement, (iii) if any of the conditions to Closing set forth in Section 3 of this
Subscription Agreement are not satisfied or waived by the party entitled to grant such waiver on or prior to the Closing and, as a result thereof, the transactions contemplated by tis Subscription Agreement are not consummated at the Closing or
(iv) by written notice from Subscriber given any time after September 17, 2021, if the Closing has not occurred by such date and the terminating party’s breach was not the primary reason the Closing failed to occur by such date;
provided that nothing herein will relieve any party from liability for any willful breach hereof prior to the time of termination, and each party will be entitled to any remedies at law or in equity to recover reasonable and documented out-of-pocket losses, liabilities or damages arising from such willful breach. The Issuer shall promptly notify Subscriber of the termination of the Merger Agreement promptly
(and in any event within one (1) business day) after the termination of such agreement. 
 6. Miscellaneous. 

6.1. Further Assurances. At the Closing, the parties hereto shall execute and deliver such additional documents and take such additional
reasonable actions as the parties reasonably may deem to be practical and necessary in order to consummate the Subscription as contemplated by this Subscription Agreement. 

6.1.1. Subscriber and the Issuer acknowledge that Subscriber, the Issuer and the Placement Agents (as third party beneficiaries
with respect to Section 2, Section 6 and Section 9 hereof) will rely on the acknowledgments, understandings, agreements, representations and warranties made by Subscriber
and Issuer contained in this Subscription Agreement. Prior to the Closing, each of Subscriber and the Issuer agrees to promptly notify the other party and the Placement Agents if any of its acknowledgments, understandings, agreements,
representations and warranties set forth herein are no longer accurate in all material respects. 
 6.1.2. Each of the
Issuer, the Subscriber and the Placement Agents (with respect to Section 2, Section 6 and Section 9 hereof), is entitled to rely upon this Subscription Agreement and is irrevocably authorized to produce this Subscription Agreement or
a copy hereof to any interested party in any administrative or Action or official inquiry with respect to the matters covered hereby. 

6.1.3. Each of Subscriber and the Issuer shall pay all of its own expenses in connection with this Subscription Agreement and
the transactions contemplated herein. The Issuer shall be responsible for the fees of the Transfer Agent, the escrow agent, stamp taxes and all of DTC’s fees associated with the issuance of the Shares. 

6.1.4. The Issuer may request from Subscriber such additional information as the Issuer may deem necessary to evaluate the
eligibility of Subscriber to acquire the Shares, and Subscriber shall promptly provide such information as may reasonably be requested, to the extent readily available and to the extent consistent with its internal policies and procedures; provided
that, to the extent Subscriber identifies any such additional information as confidential, the Issuer agrees to keep any such information provided by Subscriber confidential (except to the extent required to be disclosed by applicable law, including
in connection with any filings required to be made to the SEC or a stock exchange, in which case, Issuer shall provide prior written notice to Subscriber of such disclosure). 

6.2. Notices. Any notice or communication required or permitted hereunder shall be in writing and either delivered personally, emailed
or sent by overnight mail via a reputable overnight carrier, or sent by certified or registered mail, postage prepaid, and shall be deemed to be given and received (i) when so delivered personally, (ii) when sent, with no mail
undeliverable or other rejection notice, if sent by email, or (iii) three (3) Business Days after the date of mailing to the address below or to such other address or addresses as such person may hereafter designate by notice given
hereunder: 

  
 15 

 (i) if to Subscriber, to such address or addresses set forth on the
signature page hereto; 
 (ii) if to the Issuer, to: 

Supernova Partners Acquisition Company, Inc. 

4301 50th Street NW 

Suite 300, PMB 1044 

Washington, DC 20016 

Attention: Robert Reid and Michael Clifton 

Email: robert@supernovaspac.com and michael@supernovaspac.com 

with a required copy (which copy shall not constitute notice) to: 

Simpson Thacher & Bartlett LLP 

425 Lexington Avenue 
 New York,
NY 10017 
 Attention: Roxane Reardon and Marisa Stavenas 

Email: Rfreardon@stblaw.com and Mstavenas@stblaw.com 

6.3. Entire Agreement. This Subscription Agreement constitutes the entire agreement, and supersedes all other prior agreements,
understandings, representations and warranties, both written and oral, among the parties, with respect to the subject matter hereof, including any commitment letter entered into relating to the subject matter hereof. 

6.4. Modifications and Amendments. This Subscription Agreement may not be amended, modified, supplemented or waived except by an
instrument in writing, signed by the party against whom enforcement of such amendment, modification, supplement or waiver is sought; provided that any rights (but not obligations) of a party under this Subscription Agreement may be waived, in
whole or in part, by such party on its own behalf without the prior consent of any other party. 
 6.5. Assignment. Neither this
Subscription Agreement nor any rights, interests or obligations that may accrue to the parties hereunder (including Subscriber’s rights to purchase the Shares) may be transferred or assigned without the prior written consent of the other party
hereto (other than the Shares acquired hereunder, if any, and the Subscriber’s rights under Section 4 hereof, and then only in accordance with this Subscription Agreement); provided that Subscriber’s rights
and obligations hereunder may be assigned to any fund or account managed by the same investment manager as Subscriber or an affiliate of Subscriber, without the prior consent of the Issuer, provided that such assignee(s) agrees in writing to be
bound by the terms hereof, and upon such assignment by a Subscriber, the assignee(s) shall become Subscriber hereunder and have the rights and obligations and be deemed to make the representations and warranties of Subscriber provided for herein to
the extent of such assignment; provided further that, no assignment without the other party’s prior written consent shall relieve the assigning party of any of its obligations hereunder. 

6.6. Benefit. Except as otherwise provided herein, this Subscription Agreement shall be binding upon, and inure to the benefit of the
parties hereto and their heirs, executors, administrators, successors, legal representatives, and permitted assigns, and the agreements, representations, warranties, covenants and acknowledgments contained herein shall be deemed to be made by, and
be binding upon, such heirs, executors, administrators, successors, legal representatives and permitted assigns. This Subscription Agreement shall not confer rights or remedies upon any person other than the parties hereto and their respective
successors and permitted assigns. 
 6.7. Governing Law. This Subscription Agreement, and any claim or cause of action hereunder based
upon, arising out of or related to this Subscription Agreement (whether based on law, in equity, in contract, in tort or any other theory) or the negotiation, execution, performance or enforcement of this Subscription Agreement, shall be governed by
and construed in accordance with the Laws of the State of New York, without giving effect to the principles of conflicts of law thereof. 
  

  
 16 

 6.8. Consent to Jurisdiction; Waiver of Jury Trial. Each of the parties irrevocably
consents to the exclusive jurisdiction and venue of any state court located in The City and County of New York (the “New York State Courts”), provided that if subject matter jurisdiction over the matter that is the subject of
the Action is vested exclusively in the U.S. federal courts, such Action shall be heard in the U.S. District Court for the Southern District of New York (together with the New York State Courts, the “Chosen Courts”), in connection
with any matter based upon or arising out of this Subscription Agreement. Each party hereby waives, and shall not assert as a defense in any legal dispute, that (i) such person is not personally subject to the jurisdiction of the Chosen Courts
for any reason, (ii) such Action may not be brought or is not maintainable in the Chosen Courts, (iii) such person’s property is exempt or immune from execution, (iv) such Action is brought in an inconvenient forum or
(v) the venue of such Action is improper. Each party hereby consents to service of process in any such Action in any manner permitted by New York law, further consents to service of process by nationally recognized overnight courier service
guaranteeing overnight delivery, or by registered or certified mail, return receipt requested, at its address specified pursuant to Section 6.2 and waives and covenants not to assert or plead any objection which they might
otherwise have to such manner of service of process. Notwithstanding the foregoing in this Section 6.8, a party may commence any action, claim, cause of action or suit in a court other than the Chosen Courts solely for the
purpose of enforcing an order or judgment issued by the Chosen Courts. TO THE EXTENT NOT PROHIBITED BY APPLICABLE LAW WHICH CANNOT BE WAIVED, EACH OF THE PARTIES WAIVES ANY RIGHT TO TRIAL BY JURY ON ANY CLAIMS OR COUNTERCLAIMS ASSERTED IN ANY LEGAL
DISPUTE RELATING TO THIS SUBSCRIPTION AGREEMENT WHETHER NOW EXISTING OR HEREAFTER ARISING. IF THE SUBJECT MATTER OF ANY SUCH LEGAL DISPUTE IS ONE IN WHICH THE WAIVER OF JURY TRIAL IS PROHIBITED, NO PARTY SHALL ASSERT IN SUCH LEGAL DISPUTE A
NONCOMPULSORY COUNTERCLAIM ARISING OUT OF OR RELATING TO THIS SUBSCRIPTION AGREEMENT. FURTHERMORE, NO PARTY SHALL SEEK TO CONSOLIDATE ANY SUCH LEGAL DISPUTE WITH A SEPARATE ACTION OR OTHER LEGAL PROCEEDING IN WHICH A JURY TRIAL CANNOT BE WAIVED.

 6.9. Severability. If any provision of this Subscription Agreement shall be invalid, illegal or unenforceable, the validity,
legality or enforceability of the remaining provisions of this Subscription Agreement shall not in any way be affected or impaired thereby and shall continue in full force and effect. 

6.10. No Waiver of Rights, Powers and Remedies. No failure or delay by a party hereto in exercising any right, power or remedy under
this Subscription Agreement, and no course of dealing between the parties hereto, shall operate as a waiver of any such right, power or remedy of such party. No single or partial exercise of any right, power or remedy under this Subscription
Agreement by a party hereto, nor any abandonment or discontinuance of steps to enforce any such right, power or remedy, shall preclude such party from any other or further exercise thereof or the exercise of any other right, power or remedy
hereunder. The election of any remedy by a party hereto shall not constitute a waiver of the right of such party to pursue other available remedies. No notice to or demand on a party not expressly required under this Subscription Agreement shall
entitle the party receiving such notice or demand to any other or further notice or demand in similar or other circumstances or constitute a waiver of the rights of the party giving such notice or demand to any other or further action in any
circumstances without such notice or demand. 
 6.11. Remedies. 

6.11.1. The parties agree that irreparable damage would occur if this Subscription Agreement was not performed or the Closing
is not consummated in accordance with its specific terms or was otherwise breached and that money damages or other legal remedies would not be an adequate remedy for any such damage. It is accordingly agreed that the parties hereto shall be entitled
to equitable relief, including in the form of an injunction or injunctions, to prevent breaches or threatened breaches of this Subscription Agreement and to enforce specifically the terms and provisions of this Subscription Agreement in an
appropriate court of competent jurisdiction as set forth in Section 6.8, this being in addition to any other remedy to which any party is entitled at law or in equity, including money damages. The parties hereto
further agree (i) to waive any requirement for the security or posting of any bond in connection with any such equitable remedy, (ii) not to assert that a remedy of specific enforcement pursuant to this
Section 6.11 is unenforceable, invalid, contrary to applicable law or inequitable for any reason and (iii) to waive any defenses in any action for specific performance, including the defense that a remedy at law would
be adequate. 

  
 17 

 6.11.2. The parties acknowledge and agree that this
Section 6.11 is an integral part of the transactions contemplated hereby and without that right, the parties hereto would not have entered into this Subscription Agreement. 

6.12. Survival of Representations and Warranties. All representations and warranties made by the parties hereto in this Subscription
Agreement shall survive the Closing until the expiration of any statute of limitations under applicable law. For the avoidance of doubt, if for any reason the Closing does not occur prior to the consummation of the Transactions, all representations,
warranties, covenants and agreements of the parties hereunder shall survive the consummation of the Transactions and remain in full force and effect until the expiration of any statute of limitations under applicable law. 

6.13. [Reserved.] 
 6.14.
Headings and Captions. The headings and captions of the various subdivisions of this Subscription Agreement are for convenience of reference only and shall in no way modify or affect the meaning or construction of any of the terms or
provisions hereof. 
 6.15. Counterparts. This Subscription Agreement may be executed in one or more counterparts, all of which when
taken together shall be considered one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other parties, it being understood that the parties need not sign the same counterpart. In
the event that any signature is delivered by facsimile transmission or any other form of electronic delivery, such signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature is executed) with the
same force and effect as if such signature page were an original thereof. The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Subscription Agreement
or any document to be signed in connection with this Subscription Agreement shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or
enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means.

 6.16. Construction. The words “include,” “includes,” and “including” will be
deemed to be followed by “without limitation.” Pronouns in masculine, feminine, and neuter genders will be construed to include any other gender, and words in the singular form will be construed to include the plural and vice versa,
unless the context otherwise requires. The words “this Subscription Agreement,” “herein,” “hereof,” “hereby,” “hereunder,” and words of similar import refer to this
Subscription Agreement as a whole and not to any particular subdivision unless expressly so limited. The parties hereto intend that each representation, warranty, and covenant contained herein will have independent significance. If any party hereto
has breached any representation, warranty, or covenant contained herein in any respect, the fact that there exists another representation, warranty or covenant relating to the same subject matter (regardless of the relative levels of specificity)
which such party hereto has not breached will not detract from or mitigate the fact that such party hereto is in breach of the first representation, warranty, or covenant. All references in this Subscription Agreement to numbers of shares, per share
amounts and purchase prices shall be appropriately adjusted to reflect any stock split, stock dividend, stock combination, recapitalization or the like occurring after the date hereof. 

6.17. Mutual Drafting. This Subscription Agreement is the joint product of the parties hereto and each provision hereof has been subject
to the mutual consultation, negotiation and agreement of the parties and shall not be construed for or against any party hereto by virtue of the authorship of any of the provisions of this Subscription Agreement. 

  
 18 

 7. Cleansing Statement; Disclosure. 

7.1. The Issuer shall, by 9:00 a.m., New York City time, on the first (1st) Business Day immediately following the date of this Subscription
Agreement (the time of such filing, “Disclosure Time”), issue one or more press releases or file with the Commission a Current Report on Form 8-K disclosing, to the extent not previously
publicly disclosed, all material terms of the transactions contemplated hereby and by any Other Subscription Agreements executed and delivered at such time and the Transactions. From and after the Disclosure Time, the Issuer represents to the
Subscriber that it shall have publicly disclosed all material, non-public information delivered to the Subscriber by the Issuer or Offerpad or any of its respective officers, directors, employees or agents in
connection with the transactions contemplated by the Subscription Agreement and the Merger Agreement, and the Subscriber shall no longer be subject to any confidentiality or similar obligations under any current agreement, whether written or oral
with Issuer, Placement Agents or any of their affiliates, relating to the transactions contemplated by this Subscription Agreement. 
 7.2.
Subscriber hereby consents to the publication and disclosure in (x) the Form 8-K filed by the Issuer with the Commission in connection with the execution and delivery of the Merger Agreement, the
Proxy Statement or any other filing with the Commission pursuant to applicable securities laws and (y) any other documents or communications provided by the Issuer to any Governmental Authority or to securityholders of the Issuer, in each case,
(i) as and to the extent required by applicable law or the Commission or any other Governmental Authority, and (ii) in the filing of this Subscription Agreement with the Commission and in the related Current Report on Form 8-K, in a manner acceptable to Subscriber, of Subscriber’s name and identity and the nature of Subscriber’s commitments, arrangements and understandings under and relating to this Subscription Agreement
and, if deemed required or appropriate by the Issuer, a copy of this Subscription Agreement. Other than as set forth in the immediately preceding sentence, without Subscriber’s prior written consent, the Issuer will not publicly disclose the
name of Subscriber (including, for the avoidance of doubt, in any press release or marketing materials), other than to the Issuer’s lawyers, independent accountants and to other advisors and service providers who reasonably require such
information in connection with the provision of services to such person, are advised of the confidential nature of such information and are obligated to keep such information confidential. Subscriber will promptly provide any information reasonably
requested by the Issuer for any regulatory application or filing made or approval sought in connection with the Transactions (including filings with the Commission). 

8. Trust Account Waiver. Notwithstanding anything to the contrary set forth herein, Subscriber acknowledges that the Issuer has
established a trust account containing the proceeds of its initial public offering and from certain private placements (collectively, with interest accrued from time to time thereon, the “Trust Account”). Subscriber agrees that
(i) it has no right, title, interest or claim of any kind in or to any monies held in the Trust Account, and (ii) it shall have no right of set-off or any right, title, interest or claim of any kind
(“Claim”) to, or to any monies in, the Trust Account, in each case, in connection with this Subscription Agreement, and hereby irrevocably waives any Claim to, or to any monies in, the Trust Account that it may have in connection
with this Subscription Agreement; provided, however, that nothing in this Section 8 (x) shall serve to limit or prohibit the Subscriber’s right to pursue a claim against Issuer for legal relief
against assets held outside the Trust Account, for specific performance or other equitable relief, (y) shall serve to limit or prohibit any claims that the Subscriber may have in the future against Issuer’s assets or funds that are not
held in the Trust Account (including any funds that have been released from the Trust Account and any assets that have been purchased or acquired with any such funds) or (z) shall be deemed to limit Subscriber’s right, title, interest or
claim to the Trust Account by virtue of such Subscriber’s record or beneficial ownership of securities of the Issuer acquired by any means other than pursuant to this Subscription Agreement, including, but not limited to, any redemption right
with respect to any such securities of the Issuer. In the event Subscriber has any Claim against the Issuer under this Subscription Agreement, Subscriber shall pursue such Claim solely against the Issuer and its assets outside the Trust Account and
not against the property or any monies in the Trust Account. Subscriber agrees and acknowledges that such waiver is material to this Subscription Agreement and has been specifically relied upon by the Issuer to induce the Issuer to enter into this
Subscription Agreement and Subscriber further intends and understands such waiver to be valid, binding and enforceable under applicable law. In the event Subscriber, in connection with this Subscription Agreement, commences any Action which seeks,
in whole or in part, relief against the funds held in the Trust Account or distributions therefrom or any of the Issuer’s stockholders, whether in the form of monetary damages or injunctive relief, Subscriber shall be obligated to pay to the
Issuer all of its legal fees and costs in connection with any such action in the event that the Issuer prevails in such Action. 

  
 19 

 9. Non-Reliance. Subscriber acknowledges that
it is not relying upon, and has not relied upon, any statement, representation or warranty made by any person, firm or corporation (including, without limitation, the Placement Agents (or any of their respective affiliates or any control persons,
officers, directors, employees, partners, agents or representatives)), other than the representations and warranties of the Issuer expressly set forth in this Subscription Agreement, in making its investment or decision to invest in the Issuer.
Subscriber agrees that neither the Sponsor, OfferPad, the Placement Agents (and their respective affiliates or any control persons, officers, directors, employees, partners, agents or representatives) nor any Other Subscriber pursuant to this
Subscription Agreement or an Other Subscription Agreement or any other agreement related to the private placement of shares of the Issuer’s capital stock (including the controlling persons, officers, directors, partners, agents or employees of
any such Subscriber) shall be liable to Subscriber for any action heretofore or hereafter taken or omitted to be taken by any of them in connection with the purchase of the Shares hereunder. 

10. Rule 144. From and after such time as the benefits of Rule 144 promulgated under the Securities Act or any
other similar rule or regulation of the Commission that may allow Subscriber to sell securities of the Issuer to the public without registration may be available to holders of the Issuer’s common stock and until the earlier of (x) the
date on which Subscriber no longer owns any Shares and (y) the time Subscriber can sell the Shares under Rule 144 without any condition or limitation, the Issuer agrees to: 

10.1. make and keep public information available, as those terms are understood and defined in Rule 144; 

10.2. file with the Commission in a timely manner all reports and other documents required of the Issuer under the Securities Act and the
Exchange Act so long as the Issuer remains subject to such requirements and the filing of such reports and other documents is required for the applicable provisions of Rule 144; and 

10.3. furnish to Subscriber, promptly upon request, (x) a written statement by the Issuer, if true, that it has complied with the
reporting requirements of the Exchange Act as required under Rule 144, (y) a copy of the most recent annual or quarterly report of the Issuer and such other reports and documents so filed by the Issuer and (z) such other information as may
be reasonably requested to permit Subscriber to sell such securities pursuant to Rule 144 without registration. 
 If the Shares are
eligible to be sold without restriction under Rule 144 under the Securities Act, then at Subscriber’s request in connection with a transfer of Shares, the Issuer will cause its transfer agent to remove the legend set forth in
Section 2.1.5, and Subscriber shall provide all necessary certificates to facilitate the same. In connection therewith, if required by the Issuer’s transfer agent and subject to the delivery by the Subscriber of any
customary and reasonable representations or other documentation in connection therewith, the Issuer will promptly cause an opinion of counsel to be delivered to and maintained with its transfer agent, together with any other authorizations,
certificates and directions required by the transfer agent that authorize and direct the transfer agent to issue such Shares without any such legend; provided that, notwithstanding the foregoing, Issuer will not be required to deliver
any such opinion, authorization, certificate or direction if it reasonably believes that removal of the legend could result in or facilitate transfers of securities in violation of applicable law. 

11. Tax Matters. Subscriber agrees to complete and return with this Subscription Agreement, upon request of the Issuer (and no later
than two (2) Business Days prior to Closing), and to update as necessary, a valid and properly executed Internal Revenue Service (“IRS”) Form W-9 or
W-8, as applicable. Subscriber further agrees that, in the event that (i) the information contained on such IRS Form W-9 or
W-8 is no longer true and correct or (ii) upon reasonable request of the Issuer, Subscriber will provide a new IRS Form W-9 or
W-8 to the Issuer. 
 12. The obligations of the Subscriber under this Subscription Agreement are
several and not joint with the obligations of any Other Subscriber under the Other Subscription Agreements, and the Subscriber shall not be responsible in any way for the performance of the obligations of any Other Subscriber. The decision of the
Subscriber to purchase the Shares has been made by the Subscriber independently of any Other Subscriber and independently of any information, materials, statements, opinions as to the business, affairs, operations, assets, properties, liabilities,
results of operations, condition (financial or otherwise) or prospects of the Issuer, OfferPad or any of their respective subsidiaries which may have been made or given by any Other Subscriber or by any agent or

  
 20 

 
employee of any Other Subscriber, and neither the Subscriber nor any of its agents or employees shall have any liability to any Other Subscriber (or to any other person) relating to or arising
from any such information, materials, statements or opinions. The Subscriber acknowledges that no Other Subscriber has acted as agent for the Subscriber in connection with making its investment hereunder and no Other Subscriber will be acting as
agent of the Subscriber in connection with monitoring its investment in the Shares or enforcing its rights under this Subscription Agreement. 

[Signature Page Follows] 

  
 21 

 IN WITNESS WHEREOF, each of the Issuer and Subscriber has executed or caused this
Subscription Agreement to be executed by its duly authorized representative as of the date first written above. 
  

			
	ISSUER:
	
	SUPERNOVA PARTNERS ACQUISITION COMPANY, INC.
		
	By:	 	              

	Name:	 	
	Title:	 	

 [Signature Page – Subscription Agreement] 

 Accepted and agreed: 

SUBSCRIBER: 
  

									
	Signature of Subscriber:	 		 	Signature of Joint Subscriber, if applicable:
					
	By:	 	          
	 		 	By:	  	          

	Name:	 		 		 	Name:	  	
	Title:	 		 		 	Title:	  	
			
	Name of Subscriber:	 		 	Name of Joint Subscriber, if applicable:
			
	      
	 		 	      

	 (Please print. Please indicate name and capacity of

person signing above)
	 	                 

	 	(Please Print. Please indicate name and capacity of person signing above)
				
	  
	 		 		  	
	Name in which securities are to be registered (if different from the name of Subscriber listed directly above):	 		 		  	
				
	Email Address:	 		 		  	
				
	If there are joint investors, please check one:	 		 		  	
				
	☐ Joint Tenants with Rights of Survivorship	 		 		  	
				
	☐ Tenants-in-Common	 		 		  	
				
	☐ Community Property	 		 		  	
			
	Subscriber’s	 		 	Joint Subscriber’s EIN:
	EIN:	 	  
	 		 		  	
				
		 		 		 	      

	Business Address-Street:	 		 	Mailing Address-Street (if different):
	
	  

	
	      

	City, State, Zip:	 		 	City, State, Zip:
				
	Attn:	 		 		 	Attn:
			
	Telephone	 		 	Telephone
	No.:	 	      
	 		 	No.:	  	      

			
	Facsimile	 		 	Facsimile
	No.:	 	  
	 		 	No.:	  	  

  

  
 [Signature Page –
Subscription Agreement] 

 Aggregate Number of Shares subscribed for: 

 

                          
                                         
              
 Aggregate Purchase Price: $ ._______________ 

You must pay the Purchase Price by wire transfer of U.S. dollars in immediately available funds, to be held in escrow until the Closing if required, to the
account specified by the Issuer in the Closing Notice. 

  
 [Signature Page –
Subscription Agreement] 

 Schedule I 

ELIGIBILITY REPRESENTATIONS OF THE SUBSCRIBER 

FOR INDIVIDUALS: 
  

	1.	 INDIVIDUAL ACCREDITED INVESTOR STATUS: 

(Please check the applicable subparagraphs): 
  

	 	☐	 A natural person with individual net worth (or joint net worth with spouse or spousal equivalent (i.e.,
a cohabitant occupying a relationship generally equivalent to that of a spouse)) in excess of $1 million. For purposes of this item, “net worth” means the excess of total assets at fair market value, including automobiles and other
personal property but excluding the value of the primary residence of such natural person (and including property owned by a spouse or spousal equivalent other than the primary residence of the spouse or spousal equivalent), over total liabilities.
(For this purpose, the amount of any mortgage or other indebtedness secured by an investor’s primary residence should not be included as a “liability”, except to the extent (i) the fair market value of the residence is less than
the amount of such mortgage or other indebtedness) or (ii) such indebtedness existing on the date of the acceptance of the investor’s subscription for Shares exceeds the indebtedness that existed sixty (60) days preceding such date
and such indebtedness was not as a result of the acquisition of the investor’s primary residence). 

  

	 	☐	 A natural person with individual income (without including any income of the Investor’s spouse or spousal
equivalent) in excess of $200,000, or joint income with spouse or spousal equivalent of $300,000, in each of the two most recent years and who reasonably expects to reach the same income level in the current year. 

 

	 	☐	 A natural person holding in good standing one or more of the following certifications: General Securities
Representative license (Series 7), Private Securities Offerings Representative license (Series 82), and Investment Adviser Representative license (Series 65). 

FOR ENTITIES: 
  

	1.	 QUALIFIED INSTITUTIONAL BUYER STATUS 

(Please check the applicable subparagraphs): 
  

	 	☐	 We are a “qualified institutional buyer” (as defined in Rule 144A under the Securities Act of 1933,
as amended (the “Securities Act”)). 

 ** OR ** 
  

	2.	 INSTITUTIONAL ACCREDITED INVESTOR STATUS 

(Please check the applicable subparagraphs): 
  

	 	☐	 We are an “accredited investor” (within the meaning of Rule 501(a) under the Securities Act) for one
or more of the following reasons (Please check the applicable subparagraphs): 

  

	 	☐	 We are a bank, as defined in Section 3(a)(2) of the Securities Act or any savings and loan association or
other institution as defined in Section 3(a)(5)(A) of the Securities Act, whether acting in an individual or a fiduciary capacity. 

  

	 	☐	 We are a broker or dealer registered under Section 15 of the Securities Exchange Act of 1934, as amended.

  

	 	☐	 We are an insurance company, as defined in Section 2(13) of the Securities Act. 

	 	☐	 We are an investment company registered under the Investment Company Act of 1940 or a business development
company, as defined in Section 2(a)(48) of that act. 

  

	 	☐	 We are a Small Business Investment Company licensed by the U.S. Small Business Administration under
Section 301(c) or (d) of the Small Business Investment Act of 1958. 

  

	 	☐	 We are a plan established and maintained by a state, its political subdivisions or any agency or
instrumentality of a state or its political subdivisions for the benefit of its employees, if the plan has total assets in excess of $5 million. 

  

	 	☐	 We are an employee benefit plan within the meaning of Title I of the Employee Retirement Income Security Act of
1974, if the investment decision is being made by a plan fiduciary, as defined in Section 3(21) of such act, and the plan fiduciary is either a bank, a savings and loan association, an insurance company, or a registered investment adviser, or
if the employee benefit plan has total assets in excess of $5 million. 

  

	 	☐	 We are a private business development company, as defined in Section 202(a)(22) of the Investment Advisers
Act of 1940. 

  

	 	☐	 We are a corporation, Massachusetts or similar business trust, or partnership, or an organization described in
Section 501(c) (3) of the Internal Revenue Code of 1986, as amended, that was not formed for the specific purpose of acquiring the Shares, and that has total assets in excess of $5 million. 

 

	 	☐	 We are a trust with total assets in excess of $5 million not formed for the specific purpose of acquiring
the Shares, whose purchase is directed by a sophisticated person as described in Rule 506(b)(2)(ii) under the Securities Act. 

  

	 	☐	 We are an entity in which all of the equity owners are accredited investors. 

 

	 	☐	 We are an entity, of a type not listed above, not formed for the specific purpose of acquiring the securities
offered, owning investments in excess of $5 million. 

 * * AND * * 

 

	3.	 AFFILIATE STATUS 

(Please check the applicable box) 

THE SUBSCRIBER: 
  

	 	☐	 is: 

  

	 	☐	 is not: 

an “affiliate” (as defined in Rule 144 under the Securities Act) of the Issuer or acting on behalf of an affiliate of the Issuer.

   This page should be completed by the Subscriber and constitutes a part of the Subscription Agreement 

  
 I-2 

 Schedule II 

ELIGIBILITY REPRESENTATIONS OF THE INVESTOR (Canadian Investors Only) 

 

	1.	 We hereby declare, represent and warrant that: 

 

	 	(a)	 we are purchasing the Shares as principal for our own account, or are deemed to be purchasing the Shares as
principal for our own account in accordance with applicable Canadian securities laws, and not as agent for the benefit of another investor; 

  

	 	(b)	 we are residents in or subject to the laws of one of the provinces or territories of Canada;

  

	 	(c)	 we are entitled under applicable securities laws to purchase the Shares without the benefit of a prospectus
qualified under such securities laws and, without limiting the generality of the foregoing, are both: 

  

	 	a.	 an “accredited investor” as defined in section 1.1 of National Instrument 45-106 Prospectus Exemptions (“NI 45-106”) or section 73.3(2) of the Securities Act (Ontario) by virtue of satisfying the indicated criterion in
Section 11 below, and we are not a person created or used solely to purchase or hold securities as an “accredited investor” as described in paragraph (m) of the definition of “accredited investor” in section 1.1 of NI 45-106; and 

  

	 	b.	 a “permitted client” as defined in section 1.1 of National Instrument
31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations (“NI 31-103”) by virtue of satisfying the indicated criterion in
Section 12 below 

  

	 	(d)	 we have received, reviewed and understood, this Subscription Agreement and certain disclosure materials
relating to the placing of Shares in Canada and, are basing our investment decision solely on this Subscription and the materials provided by the Company and not on any other information concerning the Company or the offering of the Shares;

  

	 	(e)	 the acquisition of Shares does not and will not contravene any applicable Canadian securities laws, rules or
policies of the jurisdiction in which we are resident and does not trigger (i) any obligation to prepare and file a prospectus or similar document or (ii) any registration or other similar obligation on the part of any person;

  

	 	(f)	 we will execute and deliver within the applicable time periods all documentation as may be required by
applicable Canadian securities laws to permit the purchase of the Shares on the terms set forth herein and, if required by applicable Canadian securities laws, will execute, deliver and file or assist the Company in obtaining and filing such
reports, undertakings and other documents relating to the purchase of the Shares as may be required by any applicable Canadian securities laws, securities regulator, stock exchange or other regulatory authority; and 

 

	 	(g)	 neither we nor any party on whose behalf we are acting has been established, formed or incorporated solely to
acquire or permit the purchase of Shares without a prospectus in reliance on an exemption from the prospectus requirements of applicable Canadian securities laws. 

 

	2.	 We are aware of the characteristics of the Shares, the risks relating to an investment therein and agree that
we must bear the economic risk of its investment in the Shares. We understand that we will not be able to resell the Shares under applicable Canadian securities laws except in accordance with limited exemptions and compliance with other requirements
of applicable law, and we (and not the Company) are responsible for compliance with applicable resale restrictions or hold periods and will comply with all relevant Canadian securities laws in connection with any resale of the Shares.

	3.	 We hereby undertake to notify the Company immediately of any change to any declaration, representation,
warranty or other information relating to us set forth herein which takes place prior to the closing of the purchase of the Shares applied for hereby. 

  

	4.	 We understand and acknowledge that (i) the Company is not a reporting issuer in any province or territory
in Canada and its securities are not listed on any stock exchange in Canada and there is currently no public market for the Shares in Canada; and (ii) the Company currently has no intention of becoming a reporting issuer in Canada and the
Company is not obligated to file and has no present intention of filing a prospectus with any securities regulatory authority in Canada to qualify the resale of the Shares to the public, or listing the Company’s securities on any stock exchange
in Canada and thus the applicable restricted period or hold period may not commence and the Shares may be subject to an unlimited hold period or restricted period in Canada and in that case may only be sold pursuant to limited exemptions under
applicable securities legislation. 

  

	5.	 We confirm we have reviewed applicable resale restrictions under relevant Canadian legislation and regulations.

  

	6.	 It is acknowledged that we should consult our own legal and tax advisors with respect to the tax consequences
of an investment in the Shares in our particular circumstances and with respect to the eligibility of the Shares for investment by us and resale restrictions under relevant Canadian legislation and regulations, and that we have not relied on the
Company or on the contents of the disclosure materials provided by the Company, for any legal, tax or financial advice. 

  

	7.	 If we are a resident of Quebec, we acknowledge that it is our express wish that all documents evidencing or
relating in any way to the sale of the Shares be drawn in the English language only. Si nous sommes résidents de la province de Québec, nous reconnaissons par les présentes que c’est notre volonté expresse que
tous les documents faisant foi ou se rapportant de quelque manière à la vente des engagements soient rédigés en anglais seulement. 

 

	8.	 We understand and acknowledge that we are making the representations, warranties and agreements contained
herein with the intent that they may be relied upon by the Company and the agents in determining our eligibility to purchase the Shares, including the availability of exemptions from the prospectus requirements of applicable Canadian securities laws
in connection with the issuance of the Shares. 

  

	9.	 We consent to the collection, use and disclosure of certain personal information for the purposes of meeting
legal, regulatory, self-regulatory, security and audit requirements (including any applicable tax, securities, money laundering or anti-terrorism legislation, rules or regulations) and as otherwise permitted or required by law, which disclosures may
include disclosures to tax, securities or other regulatory or self-regulatory authorities in Canada and/or in foreign jurisdictions, if applicable, in connection with the regulatory oversight mandate of such authorities. 

 

	10.	 If we are an individual resident in Canada, we acknowledge that: (A) the Company or the agents may be
required to provide personal information pertaining to us as required to be disclosed in Schedule I of Form 45-106F1 Report of Exempt Distribution (“Form
45-106F1”) under NI 45-106 (including its name, email address, address, telephone number and the aggregate purchase price paid by the purchaser) (“personal
information”) to the securities regulatory authority or regulator in the local jurisdiction (the “Regulator”); 

  
 II-2 

	 	
(B) the personal information is being collected indirectly by the Regulator under the authority granted to it in securities legislation; and (C) the personal information is being collected
for the purposes of the administration and enforcement of the securities legislation; and by purchasing the securities, we shall be deemed to have authorized such indirect collection of personal information by the Regulator. Questions about the
indirect collection of information should be directed to the Regulator in the local jurisdiction, using the contact information set out below: 

  

	 	(a)	 in Alberta, the Alberta Securities Commission, Suite 600, 250—5th Street SW, Calgary, Alberta T2P 0R4,
Telephone: (403) 297-6454, toll free in Canada: 1-877-355-0585; 

 

	 	(b)	 in British Columbia, the British Columbia Securities Commission, P.O. Box 10142, Pacific Centre, 701 West
Georgia Street, Vancouver, British Columbia V7Y 1L2, Inquiries: (604) 899-6581, toll free in Canada:
1-800-373-6393, Email: inquiries@bcsc.bc.ca; 

 

	 	(c)	 in Manitoba, The Manitoba Securities Commission, 500—400 St. Mary Avenue, Winnipeg, Manitoba R3C 4K5,
Telephone: (204) 945-2548, toll free in Manitoba 1-800-655-5244; 

 

	 	(d)	 in New Brunswick, Financial and Consumer Services Commission (New Brunswick), 85 Charlotte Street, Suite 300,
Saint John, New Brunswick E2L 2J2, Telephone: (506) 658-3060, toll free in Canada:
1-866-933-2222, Email: info@fcnb.ca; 

  

	 	(e)	 in Newfoundland and Labrador, Government of Newfoundland and Labrador, Financial Services Regulation Division,
P.O. Box 8700, Confederation Building, 2nd Floor, West Block, Prince Philip Drive, St. John’s, Newfoundland and Labrador, A1B 4J6, Attention: Director of Securities, Telephone: (709) 729-4189,

  

	 	(f)	 in the Northwest Territories, the Government of the Northwest Territories, Office of the Superintendent of
Securities, P.O. Box 1320, Yellowknife, Northwest Territories X1A 2L9, Attention: Deputy Superintendent, Legal & Enforcement, Telephone: (867) 920-8984; 

 

	 	(g)	 in Nova Scotia, the Nova Scotia Securities Commission, Suite 400, 5251 Duke Street, Duke Tower, P.O. Box 458,
Halifax, Nova Scotia B3J 2P8, Telephone: (902) 424-7768; 

  

	 	(h)	 in Nunavut, Government of Nunavut, Department of Justice, Legal Registries Division, P.O. Box 1000, Station
570, 1st Floor, Brown Building, Iqaluit, Nunavut X0A 0H0, Telephone: (867) 975-6590; 

  

	 	(i)	 in Ontario, the Inquiries Officer at the Ontario Securities Commission, 20 Queen Street West, 22nd Floor,
Toronto, Ontario M5H 3S8, Telephone: (416) 593-8314, toll free in Canada: 1-877-785-1555,
Email: exemptmarketfilings@osc.gov.on.ca; 

  

	 	(j)	 in Prince Edward Island, the Prince Edward Island Securities Office, 95 Rochford Street, 4th Floor Shaw
Building, P.O. Box 2000, Charlottetown, Prince Edward Island C1A 7N8, Telephone: (902) 368-4569; 

  

	 	(k)	 in Québec, the Autorité des marchés financiers, 800, Square Victoria, 22e étage,
C.P. 246, Tour de la Bourse, Montréal, Québec H4Z 1G3, Telephone: (514) 395-0337 or
1-877-525-0337, Email: financementdessocietes@lautorite.qc.ca (For corporate finance issuers),
fonds_dinvestissement@lautorite.qc.ca (For investment fund issuers); 

  
 II-3 

	 	(l)	 in Saskatchewan, the Financial and Consumer Affairs Authority of Saskatchewan, Suite 601—1919 Saskatchewan
Drive, Regina, Saskatchewan S4P 4H2, Telephone: (306) 787-5879; and 

  

	 	(m)	 in Yukon, Government of Yukon, Department of Community Services, Law Centre, 3rd Floor, 2130 Second Avenue,
Whitehorse, Yukon Y1A 5H6, Telephone: (867) 667-5314. 

  

	 	11.	 We hereby represent, warrant, covenant and certify that we are, or any party on whose behalf we are acting is,
an “accredited investor” as defined in NI 45-106 or section 73.3(1) of the Securities Act (Ontario) by virtue of satisfying the indicated
criterion below: 

 Please check the category that applies:

  

					
	☐	  		  	a Canadian financial institution or a Schedule III bank of the Bank Act (Canada),
			
	☐	  		  	the Business Development Bank of Canada incorporated under the Business Development Bank of Canada Act (Canada),
			
	☐	  		  	a subsidiary of any person or company referred to in paragraphs (a) or (b) if the person or company owns all of the voting securities of the subsidiary, except the voting securities required by law to be owned by directors of
that subsidiary,
			
	☐	  		  	a person or company registered under the securities legislation of a province or territory of Canada as an adviser or dealer, except as otherwise prescribed by the regulations,
			
		  		  	[omitted]
			
		  	(e.1)	  	[omitted]
			
	☐	  		  	the Government of Canada, the government of a province or territory of Canada, or any Crown corporation, agency or wholly owned entity of the Government of Canada or of the government of a province or territory of Canada,
			
	☐	  		  	a municipality, public board or commission in Canada and a metropolitan community, school board, the Comité de gestion de la taxe scolaire de l’île de Montréal or an intermunicipal management board in
Québec,
			
	☐	  		  	any national, federal, state, provincial, territorial or municipal government of or in any foreign jurisdiction, or any agency of that government,
			
	☐	  	(i)	  	a pension fund that is regulated by either the Office of the Superintendent of Financial Institutions (Canada) or a pension commission or similar regulatory authority of a province or territory of Canada,
			
		  		  	[omitted]
			
	☐	  	(j.1)	  	an individual who beneficially owns financial assets having an aggregate realizable value that before taxes, but net of any related liabilities, exceeds CAD$5,000,000,
			
		  		  	[omitted]
			
		  		  	[omitted]
			
	☐	  		  	a person, other than an individual or investment fund, that has net assets of at least $5,000,000 as shown on its most recently prepared financial statements,
			
	☐	  		  	an investment fund that distributes or has distributed its securities only to
			
		  		  	a person that is or was an accredited investor at the time of the distribution,

  
 II-4 

					
		  		  	a person that acquires or acquired securities in the circumstances referred to in sections 2.10 of NI 45-106 [Minimum amount investment], or 2.19 of
NI 45-106 [Additional investment in investment funds], or
			
		  		  	a person described in paragraph (i) or (ii) that acquires or acquired securities under section 2.18 of NI 45-106 [Investment fund reinvestment],
			
	☐	  		  	an investment fund that distributes or has distributed securities under a prospectus in a jurisdiction of Canada for which the regulator or, in Québec, the securities regulatory authority, has issued a receipt,
			
	☐	  		  	a trust company or trust corporation registered or authorized to carry on business under the Trust and Loan Companies Act (Canada) or under comparable legislation in a jurisdiction of Canada or a foreign jurisdiction, acting
on behalf of a fully managed account managed by the trust company or trust corporation, as the case may be,
			
	☐	  		  	a person acting on behalf of a fully managed account managed by that person, if that person is registered or authorized to carry on business as an adviser or the equivalent under the securities legislation of a jurisdiction of
Canada or a foreign jurisdiction,
			
	☐	  		  	a registered charity under the Income Tax Act (Canada) that, in regard to the trade, has obtained advice from an eligibility adviser or an adviser registered under the securities legislation of the jurisdiction of the
registered charity to give advice on the securities being traded,
			
	☐	  		  	an entity organized in a foreign jurisdiction that is analogous to any of the entities referred to in paragraphs (a) through (d) or paragraph (i) in form and function,
			
	☐	  		  	a person in respect of which all of the owners of interests, direct, indirect or beneficial, except the voting securities required by law to be owned by directors, are persons that are accredited investors,
			
	☐	  		  	an investment fund that is advised by a person registered as an adviser or a person that is exempt from registration as an adviser,
			
	☐	  		  	a person that is recognized or designated by the Commission as an accredited investor,
			
	☐	  		  	a trust established by an accredited investor for the benefit of the accredited investor’s family members of which a majority of the trustees are accredited investors and all of the beneficiaries are the accredited
investor’s spouse, a former spouse of the accredited investor or a parent, grandparent, brother, sister, child or grandchild of that accredited investor, of that accredited investor’s spouse or of that accredited investor’s former
spouse.

  

	 	12.	 We hereby represent, warrant, covenant and certify that we are, or any party on whose behalf we are acting is,
a “permitted client” by virtue of the criterion indicated below, 

 Please check the category that applies:

  

							
	            	 	❑	  	(a)	  	a Canadian financial institution or a Schedule III bank;
				
		 	❑	  	(b)	  	the Business Development Bank of Canada incorporated under the Business Development Bank of Canada Act (Canada);
				
		 	❑	  	(c)	  	a subsidiary of any person or company referred to in paragraph (a) or (b), if the person or company owns all of the voting securities of the subsidiary, except the voting securities required by law to be owned by directors of
the subsidiary;
				
		 	❑	  	(d)	  	a person or company registered under the securities legislation of a jurisdiction of Canada as an adviser, investment dealer, mutual fund dealer or exempt market dealer;

  
 II-5 

							
		 	❑	  	(e)	  	a pension fund that is regulated by either the Office of the Superintendent of Financial Institutions or a pension commission or similar regulatory authority of a jurisdiction of Canada or a wholly-owned subsidiary of such a pension
fund;
				
		 	❑	  	(f)	  	an entity organized in a foreign jurisdiction that is analogous to any of the entities referred to in paragraphs (a) through (e);
				
		 	❑	  	(g)	  	the Government of Canada or a jurisdiction of Canada, or any Crown corporation, agency or wholly-owned entity of the Government of Canada or a jurisdiction of Canada;
				
		 	❑	  	(h)	  	any national, federal, state, provincial, territorial or municipal government of or in any foreign jurisdiction, or any agency of that government;
				
		 	❑	  	(i)	  	a municipality, public board or commission in Canada and a metropolitan community, school board, the Comité de gestion de la taxe scolaire de l’île de Montréal or an intermunicipal management board in
Quebec;
				
		 	❑	  	(j)	  	a trust company or trust corporation registered or authorized to carry on business under the Trust and Loan Companies Act (Canada) or under comparable legislation in a jurisdiction of Canada or a foreign jurisdiction, acting on
behalf of a managed account managed by the trust company or trust corporation, as the case may be;
				
		 	❑	  	(k)	  	a person or company acting on behalf of a managed account managed by person or company, if the person or company is registered or authorized to carry on business as an adviser or the equivalent under the securities legislation of a
jurisdiction of Canada or a foreign jurisdiction;
				
		 	❑	  	(l)	  	 an investment fund if one or both of the following apply:
  

(i) the fund is managed by a person or company registered as an investment fund manager under the securities legislation of a jurisdiction of Canada;

 
 (ii) the fund is advised by a person or company authorized to act as an adviser under
the securities legislation of a jurisdiction of Canada;

				
		 	❑	  	(m)	  	in respect of a dealer, a registered charity under the Income Tax Act (Canada) that obtains advice on the securities to be traded from an eligibility adviser or an adviser registered under the securities legislation of the
jurisdiction of the registered charity;
				
		 	❑	  	(n)	  	in respect of an adviser, a registered charity under the Income Tax Act (Canada) that is advised by an eligibility adviser or an adviser registered under the securities legislation of the jurisdiction of the registered
charity;
				
		 	❑	  	(o)	  	a registered charity under the Income Tax Act (Canada) that obtains advice on the securities to be traded from an eligibility adviser or an adviser registered under the securities legislation of the jurisdiction of the registered
charity;
				
		 	❑	  	(p)	  	an individual who beneficially owns financial assets having an aggregate realizable value that, before taxes but net of any related liabilities, exceeds $5 million;
				
		 	❑	  	(q)	  	a person or company that is entirely owned by an individual or individuals referred to in paragraph (o), who holds the beneficial ownership interest in the person or company directly or through a trust, the trustee of which
is a trust company or trust corporation registered or authorized to carry on business under the Trust and Loan Companies Act (Canada) or under comparable legislation in a jurisdiction of Canada or a foreign
jurisdiction;

  
 II-6 

							
		 	❑	  	(r)	  	a person or company, other than an individual or an investment fund, that has net assets of at least C$25,000,000 as shown on its most recently prepared financial statements; or
				
		 	❑	  	(s)	  	a person or company that distributes securities of its own issue in Canada only to persons or companies referred to in paragraphs (a) through (r).

  
 II-7EX-10.3

 Exhibit 10.3 

SPONSOR SUPPORT AGREEMENT 

This Sponsor Support Agreement (this “Agreement”) is dated as of March 17, 2021 by and among Supernova Partners LLC, a
Delaware limited liability company (the “Sponsor Holdco”), the Persons set forth on Schedule I hereto (together with the Sponsor Holdco, each, a “Sponsor” and, together, the “Sponsors”),
Supernova Partners Acquisition Company, Inc., a Delaware corporation (“Acquiror”), and OfferPad, Inc., a Delaware corporation (the “Company” and, collectively with the Sponsors and Acquiror, the
“Parties”). 
 RECITALS 

WHEREAS, each Sponsor is the holder of record and the “beneficial owner” (within the meaning of Rule
13d-3 under the Exchange Act) of the shares of Acquiror Class A Common Stock, Acquiror Class B Common Stock and the Acquiror Warrants as set forth opposite such Sponsor’s name on Schedule
I attached hereto; 
 WHEREAS, concurrently herewith, Acquiror, the Company, Orchids Merger Sub, Inc., a Delaware corporation and
direct, wholly owned subsidiary of Acquiror (“First Merger Sub”), and Orchids Merger Sub, LLC, a Delaware limited liability company and direct, wholly owned subsidiary of Acquiror (“Second Merger Sub”), are entering
into an Agreement and Plan of Merger (as amended, supplemented, restated or otherwise modified from time to time, the “Merger Agreement”; capitalized terms used but not otherwise defined in this Agreement shall have the meanings
ascribed to them in the Merger Agreement), pursuant to which (and subject to the terms and conditions set forth therein), (i) First Merger Sub will merge with and into the Company (the “First Merger”), with the Company being the
surviving corporation of the First Merger, and (ii) immediately following the First Merger and as part of the same overall transaction as the First Merger, the Company will merge with and into Second Merger Sub (the “Second
Merger” and, together with the First Merger, the “Mergers”), with the Second Merger Sub being the surviving entity of the Second Merger; and 

WHEREAS, as an inducement to Acquiror and the Company to enter into the Merger Agreement and to consummate the transactions contemplated
therein, the Parties desire to agree to certain matters as set forth herein. 
 AGREEMENT 

NOW, THEREFORE, in consideration of the foregoing and the mutual agreements contained herein, and intending to be legally bound hereby, the
Parties hereby agree as follows: 
 ARTICLE I 

SPONSOR SUPPORT AGREEMENT; COVENANTS; VESTING 

Section 1.1 Binding Effect of Merger Agreement. Each Sponsor hereby acknowledges that it has read the Merger Agreement and this
Agreement and has had the opportunity to consult with its tax, legal and other advisors with respect thereto and hereto. Each Sponsor shall be bound by and comply with Section 9.05 (Confidentiality; Publicity) of the Merger
Agreement (and any relevant definitions contained in any such sections) as if such Sponsor was an original signatory to the Merger Agreement with respect to such provisions. 

 Section 1.2 No Interim Period Transfers. Each Sponsor shall not, during the
Interim Period (except, in each case, pursuant to the Merger Agreement), (i) directly or indirectly sell, transfer, hypothecate, pledge, encumber, assign, hedge, swap, convert or otherwise dispose of (including by merger (including by conversion
into securities or other consideration), by tendering into any tender or exchange offer, by testamentary disposition, by operation of Law or otherwise), either voluntarily or involuntarily, any of its Acquiror Common Stock or Acquiror Warrants,
(ii) enter into any Contract or option with respect to any transaction specified in clause (i) or any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any of its
Acquiror Common Stock or Acquiror Warrants, whether any such transaction is to be settled by delivery of such securities, in cash or otherwise, or (iii) publicly announce any intention to effect any transaction specified in clauses (i) or
(ii) (any transaction specified in clauses (i), (ii) or (iii), a “Transfer”); provided, however, that the foregoing shall not prohibit a Transfer to an Affiliate of the Sponsor or to another Sponsor that is a party to
this Agreement and bound by the terms and obligations hereof; provided, further, that any such Transfer shall be permitted only if, as a precondition to such Transfer, the transferee agrees in a writing, reasonably satisfactory in form
and substance to the Company, to assume all of the obligations of the transferor under, and be bound by all of the terms of, this Agreement; provided, further, that any Transfer permitted under this
Section 1.2 shall not relieve the transferor of its obligations under this Agreement. Any Transfer in violation of this Section 1.2 shall be null and void. 

Section 1.3 New Shares. In the event that (a) any Acquiror Common Stock, Acquiror Warrants or other equity securities of
Acquiror are issued to a Sponsor during the Interim Period pursuant to any stock dividend, stock split, recapitalization, reclassification, combination or exchange of Acquiror Common Stock or Acquiror Warrants of, on or affecting the Acquiror Common
Stock or Acquiror Warrants owned by such Sponsor or otherwise, (b) a Sponsor purchases or otherwise acquires beneficial ownership of any Acquiror Common Stock, Acquiror Warrants or other equity securities of Acquiror during the Interim Period,
or (c) a Sponsor acquires the right to vote or share in the voting of any Acquiror Common Stock or other equity securities of Acquiror during the Interim Period (such Acquiror Common Stock, Acquiror Warrants or other equity securities of
Acquiror, collectively the “New Securities”), then such New Securities acquired or purchased by such Sponsor shall be subject to the terms of this Agreement to the same extent as if they constituted the Acquiror Common Stock or
Acquiror Warrants owned by such Sponsor as of the date hereof. 
 Section 1.4 Closing Date Deliverables. On the Closing Date,
(i) the Sponsor Holdco shall deliver to Acquiror and the Company a duly executed copy of that certain Amended and Restated Registration Rights Agreement, by and among Acquiror, the Company, the Sponsor Holdco and certain of the Company’s
stockholders or their respective affiliates, as applicable, in substantially the form attached as Exhibit C to the Merger Agreement, and (ii) each of Acquiror and Spencer Rascoff shall deliver to the other (with a courtesy copy to the Company)
a duly executed copy of that certain Indemnification and Advancement Agreement, in the form attached hereto as Exhibit A. 

  
 2 

 Section 1.5 Sponsor Agreements. 

(a) During the Interim Period, at any meeting of the shareholders of Acquiror, however called, or at any adjournment thereof, or in any other
circumstance in which the vote, consent or other approval of the shareholders of Acquiror is sought, in each case, as contemplated by the Merger Agreement, each Sponsor shall (i) appear at each such meeting or otherwise cause all of its
Acquiror Common Stock to be counted as present thereat for purposes of calculating a quorum and (ii) vote (or cause to be voted), or execute and deliver a written consent (or cause a written consent to be executed and delivered) covering, all
of its Acquiror Common Stock: 
 (i) in favor of the Transactions; 

(ii) against any Business Combination Proposal or any proposal relating to a Business Combination Proposal (in each case,
other than the Transactions); 
 (iii) against any merger agreement or merger (other than the Merger Agreement and the
Mergers), consolidation, combination, sale of substantial assets, reorganization, recapitalization, dissolution, liquidation or winding up of or by Acquiror; and 

(iv) against any proposal, action or agreement that would or would reasonably be expected to (A) impede, frustrate,
prevent or nullify any provision of this Agreement, the Merger Agreement or the Mergers, (B) result in a breach in any respect of any covenant, representation, warranty or any other obligation or agreement of any party under the Merger
Agreement or (C) result in any of the conditions set forth in Article X of the Merger Agreement not being fulfilled. 
 (b) Each
Sponsor shall comply with, and fully perform all of its obligations, covenants and agreements set forth in, Section 1 of the Insider Letter (as defined below). 

(c) During the Interim Period, each Sponsor shall not modify or amend any Contract between or among such Sponsor, anyone related by blood,
marriage or adoption to such Sponsor or any Affiliate of such Sponsor (other than Acquiror or any of its Subsidiaries), on the one hand, and Acquiror or any of Acquiror’s Subsidiaries, on the other hand, including, for the avoidance of doubt,
the Insider Letter. 
 Section 1.6 Further Assurances. From time to time, at the Company’s request and without further
consideration, each Sponsor shall execute and deliver such additional documents and take all such further action as may be necessary or reasonably requested to effect the actions and consummate the Transactions and the transactions contemplated
hereby. 
 Section 1.7 No Inconsistent Agreement. Each Sponsor hereby agrees that such Sponsor shall not enter into any
agreement that would restrict, limit or interfere with the performance of such Sponsor’s obligations hereunder. 

  
 3 

 Section 1.8 Lock-up. 

(a) Subject to Section 1.8(b), each Sponsor hereby agrees that such Sponsor shall not Transfer any Lock-up Shares until the end of the Lock-up Period (the “Lock-up”). 

(b) Notwithstanding the provisions set forth in Section 1.8(a), each Sponsor or its Permitted Transferees (as
defined below) may Transfer the Lock-up Shares during the Lock-up Period (i) to (A) the Acquiror’s officers or directors, (B) any Affiliates or family
members of the Acquiror’s officers or directors, or (C) any members or partners of Sponsor Holdco or their Affiliates, any Affiliates of Sponsor Holdco, or any employees of such Affiliates; (ii) in the case of an individual, by gift
to a member of such individual’s immediate family or to a trust, the beneficiary of which is a member of such individual’s immediate family, an Affiliate of such individual, or to a charitable organization; (iii) in the case of an
individual, by virtue of laws of descent and distribution upon death of such individual; (iv) in the case of an individual, pursuant to a qualified domestic relations order; (v) by private sales or transfers made in connection with the
SPNV Forward Purchase Agreement; (vi) by virtue of the laws of the State of Delaware or the Sponsor Holdco’s limited liability company agreement upon dissolution of the Sponsor Holdco; or (vii) in the event of the Acquiror’s
liquidation, merger, capital stock exchange or other similar transaction which results in all of the Acquiror’s stockholders having the right to exchange their shares of Acquiror Common Stock for cash, securities or other property subsequent to
the Closing Date; provided, that each transferee contemplated by clauses (i) through (vii) (each, a “Permitted Transferee”) must agree in writing to be bound by the Lock-up. 

(c) The Lock-up shall supersede Section 7 of the Insider Letter, which Section 7 of the
Insider Letter shall be of no further force or effect upon the beginning of the Lock-up Period. 

(d) Notwithstanding the provisions set forth in Section 1.8(a), if (A) at least 120 days have elapsed since the Closing Date and
(B) the Lock-up Period is scheduled to end during a Blackout Period or within five Trading Days prior to a Blackout Period, the Lock-up Period shall end 10 Trading
Days prior to the commencement of the Blackout Period (the “Blackout-Related Release”); provided that the Acquiror shall announce the date of the expected Blackout-Related Release through a major news
service, or on a Form 8-K, at least two Trading Days in advance of the Blackout-Related Release; and provided further that the Blackout-Related Release shall not
occur unless the Acquiror shall have publicly released its earnings results for the quarterly period during which the Closing occurred. For the avoidance of doubt, in no event shall the Lock-Up Period end
earlier than 120 days after the Closing Date pursuant to the Blackout-Related Release. 
 (e) Notwithstanding the provisions set forth in
Section 1.8(a), if the last reported sale price of the common stock on the exchange on which the common stock is listed (the “Closing Price”) equals or exceeds $12.50 per share (as adjusted for stock splits, stock dividends,
reorganizations, recapitalizations and the like) (the “Threshold Price”) for 20 out of any 30 consecutive Trading Days commencing at least 30 days after the Closing Date, including the last day of such 30 Trading Day period (any
such 30 Trading Day period during which such condition is satisfied, the “Measurement Period”), then 33% of the Sponsor’s Lock-Up Shares that are subject to
the Lock-Up Period, which percentage shall be calculated based on the number 

  
 4 

 
of Lock-Up Shares subject to the Lock-Up Period as of the last day of the Measurement Period, will be
automatically released from such restrictions (an “Early Lock-Up Expiration”) immediately prior to the opening of trading on the exchange on which the
common stock is listed on the second Trading Day following the end of the Measurement Period (an “Early Lock-Up Expiration Date”); provided that if the
Threshold Price equals or exceeds $15.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for 20 Trading Days during any Measurement Period, then an additional 50% of the Sponsor’s Lock-Up Shares will be automatically released from such restrictions pursuant to the terms set forth above (83% of the Lock-Up Shares in the aggregate); 

(f) Notwithstanding the provisions of Section 1.8(e), if, at the time of any
Early Lock-Up Expiration Date, the Acquiror is in a Blackout Period, the actual date of such Early Lock-Up Expiration shall be delayed (the
“Early Lock-Up Expiration Extension”) until immediately prior to the opening of trading on the second Trading Day (the “Extension Expiration
Date”) following the first date (such first date, the “Extension Expiration Measurement Date”) that (i) the Acquiror is no longer in a Blackout Period under its insider trading policy and
(ii) the Closing Price on the Extension Expiration Measurement Date is at least greater than the Threshold Price; provided, further, that, in the case of any of an Early Lock-Up Expiration or an
Early Lock-Up Expiration Extension, the Acquiror shall announce through a major news service, or on a Form 8-K, the
Early Lock-Up Expiration and the Early Lock-Up Expiration Date, or the Early Lock-Up Expiration
Extension and the Extension Expiration Date, as the case may be, at least one full Trading Day prior to the opening of trading on the Early Lock-Up Expiration Date or the Extension Expiration Date,
as applicable. For the avoidance of doubt, in the event that this Section 1.8(f) conflicts with the foregoing provisions, the Sponsor will be entitled to the earliest release date for the maximum number of
Lock-Up Shares available. 
 (g) Notwithstanding anything to the contrary herein, to the extent the
Board waives or repeals, or otherwise relaxes, any of the lock-up restrictions set forth in Section 7.12 of the Acquiror Bylaws (whether acting pursuant to Section 7.12(iii) of the Acquiror Bylaws or
otherwise), the Lock-up shall be identically waived, repealed or relaxed, as applicable. 
 (h) For
purposes of this Agreement: 
 (i) the term “Blackout Period” means a broadly applicable and regularly
scheduled period during which trading in the Acquiror’s securities would not be permitted under the Acquiror’s insider trading policy; 

(ii) the term “Insider Letter” means that certain Letter Agreement, dated October 20, 2020, by and among
the Acquiror, Sponsor Holdco and the other Persons party thereto; 
 (iii) the term
“Lock-up Period” means the period beginning on the Closing Date and ending at 8:00 am Eastern Time on the date that is 180 days after (and excluding) after the Closing Date; 

  
 5 

 (iv) the term “Lock-up
Shares” means the shares of Acquiror Common Stock and Acquiror Warrants (including the shares of Acquiror Common Stock issuable upon exercise thereof) held by the Sponsors immediately following the Closing (other than shares of Acquiror
Common Stock and Acquiror Warrants acquired in the public market or, in the case of Acquiror Common Stock, pursuant to a transaction exempt from registration under the Securities Act pursuant to a subscription agreement where the issuance of
Acquiror Common Stock occurs on or after the Closing); provided, that, for clarity, shares of Acquiror Common Stock issued in connection with the PIPE Investment or the SPNV Forward Purchase Agreement shall not constitute Lock-up Shares and shall not be subject to this Section 1.8; and 

(v) the term “Trading Day” is a day on which the New York Stock Exchange and the Nasdaq Stock Market are open
for the buying and selling of securities. 
 Section 1.9 No Solicitation. During the Interim Period, each Sponsor
shall not take, and shall direct its Affiliates and Representatives not to take, whether directly or indirectly, any action to solicit, initiate, continue or engage in discussions or negotiations with, or enter into any agreement with, or knowingly
encourage, respond to, provide information to or commence, continue or renew due diligence with respect to, any Person (other than the Company, Acquiror, their respective shareholders and/or any of their respective Affiliates or Representatives),
concerning, relating to or which is intended or is reasonably likely to give rise to or result in a Business Combination Proposal other than with the Company, its shareholders and their respective Affiliates and Representatives; provided,
that, the execution, delivery and performance of this Agreement and the consummation of the transactions contemplated hereby shall not be deemed a violation of this Section 1.9. Each Sponsor shall, and shall direct its
Representatives to, immediately cease any and all existing discussions or negotiations with any Person conducted prior to the date hereof with respect to, or which is reasonably likely to give rise to or result in, a Business Combination Proposal.
Notwithstanding the foregoing, (A) such Sponsor, in its capacity as such, shall not be responsible for the actions of Acquiror or the Board of Directors of Acquiror (or any committee thereof), any subsidiary of Acquiror, or any officers,
directors (in their capacity as such), employees and professional advisors of any of the foregoing (collectively, the “Acquiror Related Parties”), (B) such Sponsor, in its capacity as such, makes no representations or
warranties with respect to the actions of any of the Acquiror Related Parties, and (C) any breach by Acquiror of its obligations under Section 9.03(b) of the Merger Agreement shall not, in and of itself, be considered a breach of this
Section 1.9 (it being understood that, for the avoidance of doubt, such Sponsor or his, her or its Representatives shall remain responsible for any breach by such Sponsor or his, her or its Representatives of this
Section 1.9)). 
 Section 1.10 Waiver of Anti-Dilution Provision. Each of the Sponsors hereby (but
subject to the consummation of the Mergers) waives (for itself, for its successors, heirs and assigns), to the fullest extent permitted by law and the second amended and restated certificate of incorporation of Acquiror, the provisions of
Section 4.3(b) of the second amended and restated certificate of incorporation of Acquiror to have the Acquiror Class B Common Stock convert to Acquiror Class A Common Stock at a ratio of greater than one-for-one. 

  
 6 

 Section 1.11 Vesting Provisions Applicable to Founder Shares. 

(a) General. Sponsor Holdco agrees that, as of immediately prior to the Closing, 20% of the Founder Shares shall be unvested and, from
and after the Closing, shall be subject to the vesting and forfeiture provisions set forth in this Section 1.11. 

(b) Special Transfer Restrictions for Unvested Founder Shares. Neither Sponsor Holdco nor any of its Permitted Transferees shall
Transfer any of its unvested Founder Shares prior to the time such unvested Founder Shares become vested pursuant to subsection (c) below, except to Permitted Transferees that agree in writing to be bound by this
Section 1.11. 
 (c) Vesting of Founder Shares. 

(i) If, at any time during the 5-year period immediately following the Closing, the
VWAP of Acquiror Class A Common Stock is greater than or equal to $12.00 for any 20 Trading Days within a period of 30 consecutive Trading Days (the date when the foregoing is first satisfied, the “Earnout Achievement Date”),
then all of the unvested Founder Shares shall immediately vest. 
 (ii) If, at any time during the 5-year period immediately following the Closing, an Acquiror Sale is consummated, then the Earnout Achievement Date shall be deemed to occur immediately prior to the consummation of such Acquiror Sale, and upon such
deemed occurrence, all of the unvested Founder Shares shall immediately vest and shall be considered vested for purposes of the treatment of Acquiror Common Stock in such Acquiror Sale. 

(d) Forfeiture of Unvested Founder Shares. If the Earnout Achievement Date does not occur (or is not deemed to occur) by the end of the
5-year period immediately following the Closing (inclusive of the last day of such period), all of the unvested Founder Shares shall be forfeited without any consideration paid therefor. 

(e) Proportional Voting of Unvested Founder Shares. Sponsor Holdco hereby agrees that, with respect to all of its unvested Founder
Shares, such Founder Shares shall be present at all stockholder meetings for purposes of a quorum and voted at all such meetings, or voted, consented or approved in any other circumstances, upon which such vote, consent or other approval (including
providing any written consent as of any specified date) is sought or obtained by or from the stockholders of Acquiror, in the same manner (including by voting “for” or “against,” abstaining or withholding votes) as, and in the
same proportion to, the votes cast “for” or “against,” and abstentions or vote withholdings made, in respect of all shares of Acquiror Class A Common Stock and Acquiror Class B Common Stock, taken together, held by the
holders thereof (other than the unvested Founder Shares). 
 (f) Economic Rights of Unvested Founder Shares. Any economic rights
(including rights to dividends) of unvested Founder Shares shall be set aside for so long as such unvested Founder Shares remain unvested. Should unvested Founder Shares become vested in accordance with subsection (c) above, such Founder Shares
shall become entitled to all such economic rights that were set aside during the unvested period, including in the form of a lump sum payment of all dividends that were set aside, together with interest on such
set-aside dividends, at the prime rate published in The Wall Street Journal for the relevant date each such dividend was set aside through the date of the lump sum payment. 

  
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 (g) Equitable Adjustments. In the event that the shares of Acquiror Common Stock are
changed into a different number of shares or a different class, by reason of any stock dividend, subdivision, reclassification, reorganization, recapitalization, split, combination or exchange of shares, or any similar event shall have occurred,
then unvested Founder Shares shall be equitably adjusted in the same manner as all other shares of Acquiror Common Stock. 
 (h) Certain
Definitions. For purposes of this Agreement: 
 (i) “Acquiror Sale” means the occurrence of any of the
following events: (a) any Person or any group of Persons acting together which would constitute a “group” for purposes of Section 13(d) of the Exchange Act or any successor provisions thereto is or becomes the beneficial owner,
directly or indirectly, of securities of Acquiror representing more than 50% of the combined voting power of Acquiror’s then outstanding voting securities, (b) there is consummated a merger or consolidation of Acquiror with any other
corporation or other entity, and, immediately after the consummation of such merger or consolidation, either (x) the board of directors of Acquiror immediately prior to the merger or consolidation does not constitute at least a majority of the
board of directors of the company surviving the merger or, if the surviving company is a Subsidiary, the ultimate parent thereof, or (y) the voting securities of Acquiror immediately prior to such merger or consolidation do not continue to
represent or are not converted into more than 50% of the combined voting power of the then outstanding voting securities of the Person resulting from such merger or consolidation or, if the surviving company is a Subsidiary, the ultimate parent
thereof, or (c) the shareholders of Acquiror approve a plan of complete liquidation or dissolution of Acquiror or there is consummated an agreement or series of related agreements for the sale, lease or other disposition, directly or
indirectly, by Acquiror of all or substantially all of the assets of Acquiror and its Subsidiaries, taken as a whole, other than such sale or other disposition by Acquiror of all or substantially all of the assets of Acquiror and its Subsidiaries,
taken as a whole, to an entity at least 50% of the combined voting power of the voting securities of which are owned by shareholders of Acquiror in substantially the same proportions as their ownership of Acquiror immediately prior to such sale;

 (ii) “Founder Shares” means the shares of Acquiror Class B Common Stock (which, in connection with
the consummation of the Transactions, will convert into shares of Acquiror Class A Common Stock on a one-for-one basis) set forth across from Sponsor Holdco’s
name on Schedule I (provided, that, for clarity, shares of Acquiror Common Stock issued in connection with the PIPE Investment or the SPNV Forward Purchase Agreement shall not constitute Founder Shares and shall not be subject to this
Section 1.11); 

  
 8 

 (iii) “Trading Day” means any day on which shares of
Acquiror Class A Common Stock are actually traded on the principal securities exchange or securities market on which shares of Acquiror Class A Common Stock are then traded; and 

(iv) “VWAP” means, for any security as of any day or multi-day
period, the dollar volume-weighted average price for such security on the principal securities exchange or securities market on which such security is then traded during the period beginning at 9:30:01 a.m., New York time on such day or the first
day of such multi-day period (as applicable), and ending at 4:00:00 p.m., New York time on such day or the last day of such multi-day period (as applicable), as reported
by Bloomberg through its “HP” function (set to weighted average) or, if the foregoing does not apply, the dollar volume-weighted average price of such security in the
over-the-counter market on the electronic bulletin board for such security during the period beginning at 9:30:01 a.m., New York time on such day or the first day of
such multi-day period (as applicable), and ending at 4:00:00 p.m., New York time on such day or the last day of such multi-day period (as applicable), as reported by
Bloomberg, or, if no dollar volume-weighted average price is reported for such security by Bloomberg for such hours, the average of the highest closing bid price and the lowest closing ask price of any of the market makers for such security as
reported by OTC Markets Group Inc. during such day or multi-day period (as applicable). If the VWAP cannot be calculated for such security for such day or multi-day
period (as applicable) on any of the foregoing bases, the VWAP of such security shall be the fair market value per share at the end of such day or multi-day period (as applicable) as reasonably determined by
the board of directors of Acquiror. 
 ARTICLE II 

REPRESENTATIONS AND WARRANTIES 

Section 2.1 Representations and Warranties of the Sponsors. Each Sponsor represents and warrants as of the date hereof to Acquiror
and the Company (severally and not jointly and solely with respect to itself, himself or herself and not with respect to any other Sponsor) as follows: 

(a) Organization; Due Authorization. If such Sponsor is not an individual, it is duly organized, validly existing and in good standing
under the Laws of the jurisdiction in which it is incorporated, formed, organized or constituted, and the execution, delivery and performance of this Agreement and the consummation of the transactions contemplated hereby are within such
Sponsor’s corporate, limited liability company or organizational powers and have been duly authorized by all necessary corporate, limited liability company or organizational actions on the part of such Sponsor. If such Sponsor is an individual,
such Sponsor has full legal capacity, right and authority to execute and deliver this Agreement and to perform his or her obligations hereunder. This Agreement has been duly executed and delivered by such Sponsor and, assuming due authorization,
execution and delivery of this Agreement by each of the Company and Acquiror, this Agreement constitutes a legally valid and binding obligation of such Sponsor, enforceable against such Sponsor in accordance with the

  
 9 

 
terms hereof (except as enforceability may be limited by bankruptcy Laws, other similar Laws affecting creditors’ rights and general principles of equity affecting the availability of
specific performance and other equitable remedies). If this Agreement is being executed in a representative or fiduciary capacity, the Person signing this Agreement has full power and authority to enter into this Agreement on behalf of the
applicable Sponsor. 
 (b) Ownership. Such Sponsor is the record and beneficial owner (as defined in the Securities Act) of, and has
good title to, all of such Sponsor’s Acquiror Class B Common Stock and Acquiror Warrants, and there exist no Liens or any other limitation or restriction (including any restriction on the right to vote, sell or otherwise dispose of such
Acquiror Class B Common Stock or Acquiror Warrants (other than transfer restrictions under the Securities Act)) affecting any such Acquiror Class B Common Stock or Acquiror Warrants, other than Liens pursuant to (i) this Agreement,
(ii) the Acquiror Governing Documents, (iii) the Merger Agreement or (iv) any applicable securities Laws. Such Sponsor’s Acquiror Class B Common Stock and Acquiror Warrants are the only equity securities in Acquiror owned of
record or beneficially by such Sponsor on the date of this Agreement, and none of such Sponsor’s Acquiror Class B Common Stock or Acquiror Warrants are subject to any proxy, voting trust or other agreement or arrangement with respect to
the voting of such Acquiror Class B Common Stock or Acquiror Warrants, except as provided hereunder and under the Insider Letter. Other than the Acquiror Warrants, such Sponsor does not hold or own any rights to acquire (directly or indirectly)
any equity securities of Acquiror or any equity securities convertible into, or which can be exchanged for, equity securities of Acquiror. 

(c) No Conflicts. The execution and delivery of this Agreement by such Sponsor does not, and the performance by such Sponsor of his,
her or its obligations hereunder will not, (i) if such Sponsor is not an individual, conflict with or result in a violation of the organizational documents of such Sponsor or if such Sponsor is an individual, conflict with the rights of such
Sponsor’s spouse or domestic partner, as applicable, or (ii) require any consent or approval that has not been given or other action that has not been taken by any Person (including under any Contract binding upon such Sponsor or such
Sponsor’s Acquiror Class B Common Stock or Acquiror Warrants), in each case, to the extent the absence of such consent, approval or other action would prevent, enjoin or materially delay the performance by such Sponsor of its, his or her
obligations under this Agreement. 
 (d) Litigation. As of the date hereof, there are no Actions pending against such Sponsor, or to
the knowledge of such Sponsor threatened against such Sponsor, before (or, in the case of threatened Actions, that would be before) any arbitrator or any Governmental Authority, which in any manner challenges or seeks to prevent, enjoin or
materially delay the performance by such Sponsor of its, his or her obligations under this Agreement. 
 (e) Brokerage Fees. Except
as described on Section 6.07 of the Acquiror Disclosure Letter, no broker, finder, investment banker or other Person is entitled to any brokerage fee, finders’ fee or other commission in connection with the transactions contemplated by the
Merger Agreement based upon arrangements made by such Sponsor, for which Acquiror or any of its Affiliates may become liable. 

  
 10 

 (f) Affiliate Arrangements. Except as set forth on Schedule II attached
hereto, neither such Sponsor nor any anyone related by blood, marriage or adoption to such Sponsor or, to the knowledge of such Sponsor, any Person in which such Sponsor has a direct or indirect legal, contractual or beneficial ownership of 5% or
greater is party to, or has any rights with respect to or arising from, any Contract with Acquiror or its Subsidiaries. 
 (g)
Acknowledgment. Such Sponsor understands and acknowledges that each of Acquiror and the Company is entering into the Merger Agreement in reliance upon such Sponsor’s execution and delivery of this Agreement. 

Section 2.2 No Actions to Breach Agreement. Each Sponsor shall not take any action that would make any representation or warranty
of such Sponsor contained herein untrue or incorrect or have the effect of preventing or disabling such Sponsor from performing its obligations under this Agreement. 

Section 2.3 Update of Schedule I. If any Sponsor acquires record or beneficial ownership of any Acquiror Class A Common
Stock, Acquiror Class B Common Stock or Acquiror Warrants during the Interim Period (or becomes aware, during the Interim Period, of its record or beneficial ownership of any Acquiror Class A Common Stock, Acquiror Class B Common
Stock or Acquiror Warrants as of the date hereof, which securities are not already set forth on Schedule I), such Sponsor shall promptly notify the Company and Acquiror in writing, and Schedule I shall be updated to reflect such
Sponsor’s ownership of such additional Acquiror Class A Common Stock, Acquiror Class B Common Stock or Acquiror Warrants, as applicable. 

ARTICLE III 

MISCELLANEOUS 

Section 3.1 Termination; Non-Survival of Representations and Warranties. 

(a) This Agreement shall terminate upon the earliest to occur of (i) the termination of the Merger Agreement in accordance with its terms
in circumstances where the Closing does not occur, (ii) the consummation of an Acquiror Sale following the Closing and (iii) the later to occur of (A) the expiration of the Lock-up Period and
(B) the earlier to occur of (I) the occurrence (or deemed occurrence) of the Earnout Achievement Date on or before the fifth anniversary of the Closing Date and (II) the fifth anniversary of the Closing Date, and upon such
termination, this Agreement shall forthwith become void and have no further force or effect, without any liability on the part of any Party; provided, that (1) no such termination shall relieve any Party of any liability for its pre-termination fraud or material breach of this Agreement and (2) Section 1.1, Section 2.2, this Section 3.1, Sections 3.2
through 3.10, and (only in the event this Agreement is terminated following the Closing) Section 3.11 shall survive any such termination. 

(b) None of the representations or warranties contained in this Agreement or in any certificate or other writing delivered pursuant hereto
shall survive the Closing. 

  
 11 

 Section 3.2 Governing Law. This Agreement, and all claims or causes of action
based upon, arising out of, or related to this Agreement or the transactions contemplated hereby, shall be governed by, and construed in accordance with, the internal Laws of the State of Delaware, including its statute of limitations, without
giving effect to principles or rules of conflict of laws to the extent such principles or rules would require or permit the application of the Laws or statute of limitations of another jurisdiction. 

Section 3.3 CONSENT TO JURISDICTION AND SERVICE OF PROCESS; WAIVER OF JURY TRIAL. 

(a) Any Action based upon, arising out of or related to this Agreement or the transactions contemplated hereby may only be brought in the
Court of Chancery of the State of Delaware or, if such court lacks jurisdiction, the state and federal courts in the State of Delaware, and each of the Parties irrevocably submits to the exclusive jurisdiction of each such court in any such Action,
waives any objection it may now or hereafter have to personal jurisdiction, venue or to convenience of forum, agrees that all claims in respect of the Action shall be heard and determined only in any such court, and agrees not to bring any Action
arising out of or relating to this Agreement or the transactions contemplated hereby in any other court. Nothing herein contained shall be deemed to affect the right of any Party to serve process in any manner permitted by Law or to commence legal
proceedings or otherwise proceed against any other Party in any other jurisdiction, in each case, to enforce judgments obtained in any Action brought pursuant to this Section 3.3(a). 

(b) EACH OF THE PARTIES HERETO HEREBY KNOWINGLY, INTENTIONALLY, VOLUNTARILY AND IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY
ACTION BASED UPON, ARISING OUT OF OR RELATED TO THIS SPONSOR AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY. 
 Section 3.4
Assignment. Neither this Agreement nor any of the rights, interests or obligations hereunder shall (a) be assigned by any of the Sponsors, in whole or in part (whether by operation of Law or otherwise), without the prior written consent
of Acquiror and the Company or (b) be assigned by Acquiror or the Company, in whole or in part (whether by operation of law or otherwise), without the prior written consent of the Company (in the case of an attempted assignment by Acquiror) or
Acquiror (in the case of an attempted assignment by the Company). Any such assignment without such consent shall be null and void. This Agreement shall be binding upon, inure to the benefit of and be enforceable by the Parties and their respective
successors and permitted assigns. 
 Section 3.5 Specific Performance. The Parties agree that irreparable damage (for which
monetary damages, even if available, would not be an adequate remedy) would occur, and that the Parties would not have any adequate remedy at law, in the event that any of the provisions of this Agreement were not performed in accordance with their
specific terms or were otherwise breached. It is accordingly agreed that the Parties shall be entitled to specific performance, an injunction or injunctions, or other equitable relief to prevent breaches or threatened breaches of this Agreement and
to enforce specifically the terms and provisions of this Agreement, including each Sponsor’s obligations under Section 1.5(a), without proof of actual damages or otherwise (and each Party hereby waives any requirement
for the securing or posting of any bond in connection with such remedy), this being in addition to any other remedy 

  
 12 

 
to which they are entitled at Law or in equity. Each Party acknowledges and agrees that the right of specific enforcement is an integral part of the transactions contemplated hereby and that,
without such right, none of the Parties would have entered into this Agreement. Each Party agrees that it will not oppose the granting of specific performance and other equitable relief on the basis that the other Parties have an adequate remedy at
Law. 
 Section 3.6 Amendment. This Agreement may not be amended, modified or supplemented in any manner, whether by course of
conduct or otherwise, except by an instrument in writing signed by Acquiror, the Company and each Sponsor charged with such amendment, modification or supplement. 

Section 3.7 Severability. If any term or other provision of this Agreement is held by a court of competent jurisdiction or other
authority to be invalid, void, unenforceable or against its regulatory policy, the remainder of the terms and provisions of this Agreement shall remain in full force and effect and shall in no way be affected, impaired or invalidated. Upon such a
determination, the Parties shall negotiate in good faith to modify this Agreement so as to effect the original intent of the Parties as closely as possible in an acceptable manner in order that the transactions contemplated hereby be consummated as
originally contemplated to the fullest extent possible. 
 Section 3.8 Notices. All notices and other communications hereunder
shall be in writing and shall be deemed given if delivered personally, by email (with confirmation of receipt) or sent by a nationally recognized overnight courier service, such as Federal Express, to the Parties at the following addresses (or at
such other address for a Party as shall be specified by like notice made pursuant to this Section 3.8): 
 If to
Acquiror prior to the Closing: 
 Supernova Partners Acquisition Company, Inc. 

4301 50th St. NW 
 Suite 300, PMB
1044 
 Washington, DC 20016 

Attention: Robert Reid, CEO; Michael Clifton, CFO 

Email: robert@supernovaspac.com; michael@supernovaspac.com 

with a copy to (which will not constitute notice): 

Simpson Thacher & Bartlett LLP 

900 G Street, NW 
 Washington,
D.C. 20001 
 Attn: Jonathan L. Corsico 

E-mail: jonathan.corsico@stblaw.com 

and 
 Simpson Thacher &
Bartlett LLP 
 425 Lexington Ave. 

  
 13 

 
New York, NY 10017 
 Attn: Michael Wolfson 

E-mail: mwolfson@stblaw.com 

If to the Company: 

OfferPad, Inc. 
 2150 E Germann
Rd, Suite 1 
 Chandler, AZ 85286 

Attention: Benjamin Aronovitch, Chief Legal Officer 

Email: benjamin.aronovitch@offerpad.com 

with a copy to (which shall not constitute notice): 

Latham & Watkins LLP 

885 Third Avenue 
 New York, New
York 10022 
 Attention: Justin Hamill; Josh Dubofsky 

Email: justin.hamill@lw.com; josh.dubofsky@lw.com 

If to a Sponsor: 
 To such
Sponsor’s address set forth in Schedule I 
 with a copy to (which will not constitute notice): 

Simpson Thacher & Bartlett LLP 

900 G Street, NW 
 Washington,
D.C. 20001 
 Attn: Jonathan L. Corsico 

E-mail: jonathan.corsico@stblaw.com 

and 
 Simpson Thacher &
Bartlett LLP 
 425 Lexington Ave. 

New York, NY 10017 
 Attn: Michael
Wolfson 
 E-mail: mwolfson@stblaw.com 

If to Acquiror after the Closing: 

Supernova Partners Acquisition Company, Inc. 

2150 E Germann Rd, Suite 1 

Chandler, AZ 85286 
 Attention:
Benjamin Aronovitch, Chief Legal Officer 
 Email: benjamin.aronovitch@offerpad.com 

  
 14 

 In addition to the foregoing, in the case of any
pre-Closing notices sent by any Sponsor to any other Sponsor or Acquiror, or sent by Acquiror to any Sponsor, copies shall also be sent to the Company and to Latham & Watkins LLP (to the persons
referenced above). 
 Section 3.9 Counterparts. This Agreement may be executed in two or more counterparts (any of which may be
delivered by electronic transmission), each of which shall constitute an original, and all of which taken together shall constitute one and the same instrument. 

Section 3.10 Entire Agreement. This Agreement and the agreements referenced herein constitute the entire agreement and
understanding of the Parties in respect of the subject matter hereof and supersede all prior understandings, agreements or representations by or among the Parties to the extent they relate in any way to the subject matter hereof. 

Section 3.11 Mutual Release. 

(a) Effective as of the Closing, Acquiror, on behalf of itself and its Subsidiaries and its and their respective successors and assigns (each,
an “Acquiror Releasing Party”), hereby unconditionally and irrevocably forever releases and discharges each Sponsor and each of its Affiliates, and any past, present or future directors, managers, officers, employees,
Representatives, agents, lenders, investors, partners, principals, members, managers, direct or indirect shareholders or equityholders of any of the foregoing Persons, and the respective successors and assigns of the foregoing Persons (each, an
“Acquiror Released Party”), of and from, and hereby unconditionally and irrevocably waives, releases and discharges any and all proceedings, covenants, claims, liabilities, suits, judgments, accounts, actions and causes of action of
any kind or character whatsoever, known or unknown, suspected or unsuspected, in Contract, direct or indirect, primary or secondary, at Law or in equity, that such Acquiror Releasing Party ever had, now has or ever may have or claim to have against
any Acquiror Released Party, for or by reason of any matter, circumstance, event, action, inaction, omission, cause or thing arising at or prior to the Closing, or otherwise related to the pre-Closing period;
provided, that nothing contained in this Section 3.11(a) shall be construed as a waiver of any rights under (i) this Agreement, (ii) any other Transaction Agreement to which any Acquiror Releasing Party is
party or (iii) with respect to any Acquiror Released Party who is a natural person, any indemnification, employment or other similar arrangements (including any such arrangement providing for exculpation or advancement of expenses). Acquiror,
on behalf of itself and the other Acquiror Releasing Parties, expressly waives all rights afforded by any statute which limits the effect of a release with respect to unknown claims, and understands the significance of this release of unknown claims
and waiver of statutory protection against a release, on behalf of itself and the other Acquiror Releasing Parties, of unknown claims, and acknowledges and agrees that this waiver is an essential and material term of this Agreement. Acquiror, on
behalf of itself and each other Acquiror Releasing Party, acknowledges that each Sponsor will be relying on the waiver and release provided in this Section 3.11(a) in connection with entering into this Agreement and that
this Section 3.11(a) is intended for the benefit of the Acquiror Released Parties and to grant third party beneficiary rights to each Acquiror Released Party to enforce this Section 3.11(a). 

  
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 (b) Effective as of the Closing, each Sponsor, on behalf of itself and its Affiliates and
its and their respective successors and assigns (each, a “Sponsor Releasing Party”), hereby unconditionally and irrevocably forever releases and discharges Acquiror and each of its Affiliates, and any past, present or future
directors, managers, officers, employees, Representatives, agents, lenders, investors, partners, principals, members, managers, direct or indirect shareholders or equityholders of any of the foregoing Persons, and the respective successors and
assigns of the foregoing Persons (each, a “Sponsor Released Party”), of and from, and hereby unconditionally and irrevocably waives, releases and discharges any and all proceedings, covenants, claims, liabilities, suits, judgments,
accounts, actions and causes of action of any kind or character whatsoever, known or unknown, suspected or unsuspected, in Contract, direct or indirect, primary or secondary, at Law or in equity, that such Sponsor Releasing Party ever had, now has
or ever may have or claim to have against any Sponsor Released Party, for or by reason of any matter, circumstance, event, action, inaction, omission, cause or thing arising at or prior to the Closing, or otherwise related to the pre-Closing period; provided, that nothing contained in this Section 3.11(b) shall be construed as a waiver of any rights under (i) this Agreement, (ii) any other Transaction Agreement to which
such Sponsor or any of its associated Sponsor Releasing Parties is party or (iii) with respect to any Sponsor Releasing Party who is a natural person, any indemnification, employment or other similar arrangements (including any such arrangement
providing for exculpation or advancement of expenses). Each Sponsor, on behalf of itself and each of its associated Sponsor Releasing Parties, expressly waives all rights afforded by any statute which limits the effect of a release with respect to
unknown claims, and understands the significance of this release of unknown claims and waiver of statutory protection against a release, on behalf of itself and its associated Sponsor Releasing Parties, of unknown claims, and acknowledges and agrees
that this waiver is an essential and material term of this Agreement. Each Sponsor, on behalf of itself and each of its associated Sponsor Releasing Parties, acknowledges that Acquiror will be relying on the waiver and release provided in this
Section 3.11(b) in connection with entering into this Agreement and that this Section 3.11(b) is intended for the benefit of the Sponsor Released Parties and to grant third party beneficiary rights
to each Sponsor Released Party to enforce this Section 3.11(b). 
 [THE REMAINDER OF THIS PAGE IS INTENTIONALLY
BLANK] 

  
 16 

 IN WITNESS WHEREOF, the Sponsors, Acquiror, and the Company have each caused this Sponsor
Support Agreement to be duly executed as of the date first written above. 
  

			
	SPONSORS:
	
	SUPERNOVA PARTNERS LLC
		
	By:	 	 /s/ Michael S. Clifton

		 	Name: Michael S. Clifton
		 	Title: Chief Financial Officer

 
	
	
	 /s/ Spencer M. Rascoff

	Name: Spencer M. Rascoff
	
	 /s/ Alexander M. Klabin

	Name: Alexander M. Klabin
	
	 /s/ Robert D. Reid

	Name: Robert D. Reid
	
	 /s/ Michael S. Clifton

	Name: Michael S. Clifton
	
	 /s/ Ken Fox

	Name: Ken Fox
	
	 /s/ Jim Lanzone

	Name: Jim Lanzone
	
	 /s/ Greg Renfrew

	Name: Gregg Renfrew
	
	 /s/ Rajeev Singh

	Name: Rajeev Singh

 [Signature Page to Sponsor Support Agreement] 

 
			
	ACQUIROR:
	
	SUPERNOVA PARTNERS ACQUISITION
	COMPANY, INC.
		
	By:	 	 /s/ Michael S. Clifton

		 	Name: Michael S. Clifton
		 	Title: Chief Financial Officer
	
	COMPANY:
	
	OFFERPAD, INC.
		
	By:	 	 /s/ Brian Bair

		 	Name: Brian Bair
		 	Title: Chief Executive Officer & Founder

 [Signature Page to Sponsor Support Agreement]

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