Filed Pursuant to Rule 424(b)(3)
Registration No. 333-263798

PROSPECTUS SUPPLEMENT NO. 1

(To Prospectus dated June 1, 2022)

UP TO 19,354,059 SHARES OF COMMON STOCK

ISSUABLE UPON EXERCISE OF WARRANTS

UP TO 96,941,181 SHARES OF COMMON STOCK

UP TO 4,450,000 WARRANTS TO PURCHASE COMMON STOCK

This prospectus supplement supplements the prospectus, dated June 1, 2022 (the “Prospectus”), which forms a part of our registration statement on Form S-1 (No. 333-263798). This prospectus supplement is being filed to update and supplement the information in the Prospectus with the information contained in our Current Report on Form 8-K filed with the Securities and Exchange Commission on July 6, 2022 (the “Current Report”). Accordingly, we have attached the Current Report to this prospectus supplement.

The Prospectus and this prospectus supplement relates to the issuance by us of up to an aggregate of 19,354,059 shares of our common stock, $0.0001 par value per share (the “common stock”) consisting of (i) 4,450,000 shares of common stock issuable upon the exercise of 4,450,000 warrants (the “private placement warrants”) originally issued in a private placement in connection with the initial public offering (the “IPO”) of Supernova Partners Acquisition Company II, Ltd., a Cayman Islands exempted company (“Supernova”), by the holders thereof, (ii) 8,624,972 shares of common stock issuable upon the exercise of 8,624,972 warrants (the “public warrants” and, together with the private placement warrants, the “warrants”) originally issued in the IPO by holders thereof, and (iii) 6,279,087 shares of common stock issuable upon the exercise of warrants assumed by us and converted into warrants to purchase common stock (the “Rigetti assumed warrants”) in connection with the Business Combination (as defined below). We will receive the proceeds from the exercise of any warrants and any Rigetti assumed warrants for cash.

The Prospectus and this prospectus supplement also relates to the offer and sale from time to time by the selling securityholders named in this prospectus or their permitted transferees (the “selling securityholders”) of up to (i) 96,941,181 shares of common stock consisting of (a) 10,251,000 shares of common stock purchased by subscribers at a price of $10.00 per share and 4,390,244 shares of common stock purchased by subscribers at a price of $10.25 per share in private placements pursuant to separate subscription agreements, (b) 8,625,000 shares of common stock (the “Founder Shares”) originally purchased by Supernova Partners II LLC (“Supernova Sponsor”) for $25,000, or for approximately $0.004 per share, in a private placement in connection with the IPO, including 3,059,273 Founder Shares subject to vesting and forfeiture (the “Sponsor Vesting Shares”), (c) 4,450,000 shares of common stock issuable upon exercise of the private placement warrants, (d) 2,446,716 shares of common stock issuable pursuant to the exercise of Rigetti assumed warrants, which Rigetti assumed warrants have a weighted average exercise price of $0.6628 per share, (e) 6,226,065 shares of common stock issuable upon exercise of outstanding options, which have an exercise price of $0.272 per share, (f) 6,288,369 shares of common stock issuable in connection with the vesting and settlement of outstanding restricted stock units, which were assumed by and converted into restricted stock awards for common stock in connection with the Business Combination based on an acquiror share value of $10.00 per share and (g) 54,263,787 shares of common stock issued in connection with the Business Combination as merger consideration at an acquiror share value of $10.00 per share, and (ii) up to 4,450,000 private placement warrants, which were purchased by Supernova Sponsor at a price of $2.00 per warrant. We will not receive any proceeds from the sale of shares of common stock or warrants by the selling securityholders pursuant to this prospectus.

This prospectus supplement updates and supplements the information in the Prospectus and is not complete without, and may not be delivered or utilized except in combination with, the Prospectus, including any amendments or supplements thereto. This prospectus supplement is qualified by reference to the Prospectus, including any amendments or supplements thereto, except to the extent that the information in this prospectus supplement updates and supersedes the information contained therein.

Our common stock and public warrants are listed on the Nasdaq Capital Market under the symbols “RGTI” and “RGTIW,” respectively. On July 5, 2022, the last reported sales price of our common stock was $4.27 per share and the last reported sales price of our public warrants was $0.65 per warrant.

We are an “emerging growth company” as defined under U.S. federal securities laws and, as such, have elected to comply with reduced public company reporting requirements. This prospectus complies with the requirements that apply to an issuer that is an emerging growth company.

Investing in our securities involves a high degree of risks. You should review carefully the risks and uncertainties described in the section titled “Risk Factors” beginning on page 16 of this prospectus, and under similar headings in any amendments or supplements to this prospectus.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities, or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.

Prospectus Supplement dated July 6, 2022.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): June 29, 2022

RIGETTI COMPUTING, INC.

(Exact name of registrant as specified in its charter)

(510) 210-5550

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

On June 29, 2022, General Peter Pace, the Chairman of the Board of Directors (the “Board”) of Rigetti Computing, Inc. (the “Company”), informed the Company of his decision to resign as a director of the Company, effective at 12:00 p.m. Eastern Time on July 15, 2022, in order to spend more time with his family. General Pace’s decision to resign from the Board was not the result of any disagreement relating to the Company’s operations, policies, or practices. The Company thanks General Pace for his commitment and service to the Company.

In connection with General Pace’s resignation, the Compensation Committee of the Board and the Board have determined that 68,043 shares of unvested restricted stock and 15,075 unvested restricted stock units held by General Pace shall accelerate and immediately vest effective upon the date of his resignation.

On July 5, 2022, the Board, upon the recommendation of the Nominating and Corporate Governance Committee of the Board, appointed Ms. Cathy McCarthy, a current director on the Board, as Chair of the Board, effective at 12:00 p.m. Eastern Time on July 15, 2022. In addition, the Board, upon the recommendation of the Nominating and Governance Committee of the Board, appointed H. Gail Sandford, a current director on the Board, as a member of the Audit Committee of the Board and a member of the Nominating and Corporate Governance Committee of the Board, effective at 12:00 p.m. Eastern Time on July 15, 2022.

A copy of the press release announcing General Pace’s resignation and the appointments has been filed as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference.

Item 8.01. Other Events.

As previously disclosed, in connection with the execution of the Agreement and Plan of Merger, dated as of October 6, 2021, as amended on December 23, 2021 and January 10, 2022 (as amended, the “Merger Agreement”), by and among Rigetti Holdings, Inc. (“Legacy Rigetti”), Supernova Partners Acquisition Company II, Ltd., a Cayman Islands exempted company (“Supernova”), Supernova Merger Sub, Inc., a Delaware corporation and a direct wholly owned subsidiary of Supernova, Supernova Romeo Merger Sub, LLC, a Delaware limited liability company and a direct wholly owned subsidiary of Supernova, on October 6, 2021, Legacy Rigetti entered into a warrant subscription agreement (the “Warrant Subscription Agreement”) with Ampere Computing LLC (“Ampere”) for the purchase of a warrant for an aggregate purchase price (including amounts for exercise) of $10,000,000 pursuant to which the warrant may be exercised by Ampere at an exercise price of $0.0001 per share for 1,000,000 shares of the Company’s common stock. The Warrant Subscription Agreement was assumed by the Company pursuant to the Merger Agreement in connection with the closing of the business combination pursuant to the Merger Agreement.

On June 30, 2022, pursuant to the Warrant Subscription Agreement, the Company issued the warrant to Ampere upon receipt of an aggregate of $5 million (including the exercise price), and upon such payment and issuance, 500,000 shares of the Company’s common stock vested under the warrant and were immediately exercised by Ampere pursuant to the terms of the warrant. The purchase of the warrant pursuant to the Warrant Subscription Agreement was conditioned upon, among other things, the consummation of the business combination pursuant to the Merger Agreement and the entry into a collaboration agreement between Legacy Rigetti and Ampere. Pursuant to the Warrant Subscription Agreement, Ampere is required to pay an additional $4,999,950 to the Company no later than the second anniversary of the date of the Warrant Subscription Agreement, and upon such payment, the warrant will vest and be exercisable by Ampere with respect to the remaining 500,000 shares of the Company’s common stock pursuant to the terms of the warrant. The warrant and the shares of common stock issued pursuant to the warrant have not been registered under the Securities Act of 1933, as amended, and were issued in reliance on an exemption from such registration. The Warrant Subscription Agreement further provides that the Company will use commercially reasonable efforts to file a registration statement to register the resale of the shares issued or issuable pursuant to the warrant within fifteen (15) business days after the closing date for the warrant, which was June 30, 2022.

The foregoing description of the terms of the Warrant Subscription Agreement and warrant do not purport to be complete and is subject to, and is qualified in its entirety by, reference to the Warrant Subscription Agreement and the warrant, copies of which are filed as Exhibits 99.2 and 99.3 and are incorporated by reference.

Item 9.01. Financial Statements and Exhibits.

(d)    Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: July 6, 2022

Exhibit 99.1

Rigetti Computing Announces Chairperson Transition

Current Director Cathy McCarthy Appointed Chairperson of the Board

BERKELEY, Calif., July 6, 2022 (GLOBE NEWSWIRE) — Rigetti Computing, Inc. (“Rigetti” or “the Company”) (NASDAQ: RGTI), a pioneer in hybrid quantum-classical computing systems, today announced General Peter Pace, Chairman of the Company’s board of directors (the “Board”), will step down from his position. Director Cathy McCarthy has been appointed as Chair of the Board. Director Gail Sandford has been appointed to the Nominating and Corporate Governance Committee as well as the Audit Committee. All position changes will take effect as of July 15, 2022.

“I’d like to thank General Pace on behalf of our Board and management team for his many contributions to Rigetti over the years,” commented Chad Rigetti, founder and CEO of Rigetti Computing. “Throughout Pete’s tenure, Rigetti has advanced significantly, growing from its initial stages in the private markets to list on Nasdaq and establish relationships with some of today’s leading governmental and commercial organizations. We thank Pete for his service to Rigetti and wish him all the best going forward.”

“Rigetti’s mission to build the world’s most powerful computers to help solve humanity’s most important and pressing problems has always inspired me,” commented General Pace. “For more than half a decade, it’s been my honor and pleasure to work with Chad and the rest of the Board. Today, family matters require my attention, otherwise, I would continue to proudly serve Rigetti and its shareholders.”

Ms. McCarthy has served on Rigetti’s Board since July 2021 and is currently President and CEO of the strategy consulting firm Cross Tack Consulting. Ms. McCarthy has extensive executive-level experience at both public and private companies, including SM&A, a publicly traded consulting firm that specializes in business capture and program support services for clients in Aerospace, Defense, Homeland Security, and Information Services. From 2009 to 2013, Ms. McCarthy served on Solta Medical, Inc.’s board of directors, compensation committee, and audit committee, prior to the company’s merger with Valeant Pharmaceuticals International, Inc. She also currently serves as a board member and the audit committee chairperson for the Middleby Corporation, a publicly traded global leader in the foodservice industry.

About Rigetti

Rigetti is a pioneer in full-stack quantum computing. The Company has operated quantum computers over the cloud since 2017 and serves global enterprise, government, and research clients through its Rigetti Quantum Cloud Services platform. The Company’s proprietary quantum-classical infrastructure provides ultra-low latency integration with public and private clouds for high-performance practical quantum computing. Rigetti has developed the industry’s first multi-chip quantum processor for scalable quantum computing systems. The Company designs and manufactures its chips in-house at Fab-1, the industry’s first dedicated and integrated quantum device manufacturing facility. Rigetti was founded in 2013 by Chad Rigetti and today employs more than 160 people with offices in the United States, U.K. and Australia. Learn more at www.rigetti.com.

Forward looking statements

Certain statements in this communication may be considered forward-looking statements, including but not limited to, responsibilities in connection with the management of the Company’s business and operations, including with respect to the Company’s board of directors, and Rigetti’s mission. Forward-

pg. 1

looking statements generally relate to future events and can be identified by terminology such as “pro forma,” “may,” “should,” “could,” “might,” “plan,” “possible,” “project,” “strive,” “budget,” “forecast,” “expect,” “intend,” “will,” “estimate,” “anticipate,” “believe,” “predict,” “potential,” “pursue,” “anticipate” or “continue,” or the negatives of these terms or variations of them or similar terminology. Such forward-looking statements are subject to risks, uncertainties, and other factors which could cause actual results to differ materially from those expressed or implied by such forward-looking statements. These forward-looking statements are based upon estimates and assumptions that, while considered reasonable by Rigetti and its management, are inherently uncertain. Factors that may cause actual results to differ materially from current expectations include, but are not limited to: Rigetti’s ability to achieve milestones, technological advancements, including with respect to its roadmap, help unlock quantum computing, and develop practical applications; the potential of quantum computing; the success of Rigetti’s partnerships and collaborations; Rigetti’s ability to accelerate its development of multiple generations of quantum processors; the outcome of any legal proceedings that may be instituted against Rigetti or others with respect to its business combination with Supernova Partners Acquisition Company II, Ltd. (the “Business Combination”) or other matters; the ability to meet stock exchange listing standards; the risk that the Business Combination disrupts current plans and operations of Rigetti; the ability to recognize the anticipated benefits of the Business Combination, which may be affected by, among other things, competition, the ability of Rigetti to grow and manage growth profitably, maintain relationships with customers and suppliers and retain its management and key employees; costs related to the Business Combination and operating as a public company; changes in applicable laws or regulations; the possibility that Rigetti may be adversely affected by other economic, business, or competitive factors; Rigetti’s estimates of expenses and profitability; the evolution of the markets in which Rigetti competes; the ability of Rigetti to execute on its technology roadmap; the ability of Rigetti to implement its strategic initiatives, expansion plans and continue to innovate its existing services; the impact of the COVID-19 pandemic on Rigetti’s business; the expected use of proceeds of the Business Combination; the sufficiency of Rigetti’s cash resources; unfavorable conditions in Rigetti’s industry, the global economy or global supply chain, including financial and credit market fluctuations, international trade relations, political turmoil, natural catastrophes, warfare (such as the conflict involving Russia and Ukraine), and terrorist attacks; and other risks and uncertainties set forth in the section entitled “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements” in the registration on Form S-4, the Company’s Form 8-K filed with the Securities and Exchange Commission (the “SEC”) on March 7, 2022, and in the Company’s Form 10-Q for the three months ended March 31, 2022, and other documents filed by the Company from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements. Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and the Company assumes no obligation and does not intend to update or revise these forward-looking statements other than as required by applicable law. The Company does not give any assurance that it will achieve its expectations.

Contacts

Rebecca Malamud

Rigetti Computing, Inc.

press@rigetti.com

pg. 2

Polly Pearson

Investor Relations

RGTI@investorrelations.com

pg. 3

Exhibit 99.2

WARRANT SUBSCRIPTION AGREEMENT

This WARRANT SUBSCRIPTION AGREEMENT (this “Subscription Agreement”) is entered into as of October 6, 2021 by and between Rigetti Holdings, 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 and Supernova Partners Acquisition Company II, Ltd., a Cayman Islands exempted company (which shall domesticate as a Delaware corporation prior to the Closing) (“Supernova”), 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 (i) prior to the Closing and subject to the conditions of the Merger Agreement, the Supernova shall domesticate as a Delaware corporation in accordance with Section 388 of the Delaware General Corporation Law (the “DGCL”) and the applicable provisions of the Cayman Islands Companies Act (2021 Revision) (the “Companies Act”) (such deregistration and domestication, including all matters necessary or ancillary in order to effect such domestication, the “Domestication”) and (ii) Supernova will acquire 100% of the outstanding equity and equity equivalents of the Issuer (including options, warrants, preferred stock or other securities that have the right to acquire or convert into equity securities of the Issuer) (the “Acquisition”);

WHEREAS, the Issuer and the Subscriber desire to enter into the Collaboration Agreement (as defined below);

WHEREAS, in connection with the Acquisition and Collaboration Agreement, Subscriber desires to subscribe for and purchase from the Issuer a warrant in the form attached hereto (the “Warrant”) entitling the Subscriber to purchase shares of Class A common stock, par value $0.000001 per share, of the Issuer (the “Issuer Common Stock”) or such other securities as may be issuable upon the consummation of certain reorganization events, including the Acquisition, in which case such Warrant shall be exercisable for shares of common stock, par value $0.000001 per share, of Supernova after the Domestication as a corporation incorporated in the State of Delaware, subject to the to the terms and conditions set forth in the Warrant (the “Shares”), at an exercise price of $0.0001 per Share, exercisable for (i) 500,000 Shares, subject to the adjustments set forth in the Warrant (the “Tranche 1 Warrant Shares”), subject to the payment of an aggregate purchase price of $4,999,950 by Subscriber for the right to purchase the Tranche 1 Warrant Shares in accordance with the Warrant (the “Tranche 1 Warrant Purchase Price”), which is due and payable as set forth in Section 1 herein and (ii) an additional 500,000 Shares, subject to the adjustments set forth in the Warrant (the “Tranche 2 Warrant Shares”), for an aggregate purchase price of $4,999,950 for the right to purchase the Tranche 2 Warrant Shares in accordance with the Warrant, which is due and payable as set forth in Section 1 herein (the “Tranche 2 Warrant Purchase Price” and, together with the Tranche 1 Warrant Purchase Price, the “Purchase Price”), and the Issuer desires to issue and sell to Subscriber the Warrant 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

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:

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3.2. Conditions to Closing of the Issuer.

The Issuer’s obligations to sell and issue the Warrant at the applicable Closing are subject to the fulfillment or waiver by Issuer, on or prior to the applicable Closing Date, of each of the following conditions:

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Subscriber’s obligation to purchase the Warrant at the applicable Closing is subject to the fulfillment or waiver in writing by Subscriber, on or prior to the applicable Closing Date, of each of the following conditions:

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(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, in each case within two (2) Business Days;

(b) within two (2) Business Days 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

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(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;

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

(ii) if to the Issuer, to:

Rigetti Holdings, Inc.

775 Heinz Avenue Berkeley, CA 94710

Attention: Rick Danis, General Counsel

E-mail:

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

Cooley LLP

55 Hudson Yards,

New York, NY 10001

Attention: Adam Dinow, David Silverman, Rupa Briggs

Email: 

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[Signature Page Follows]

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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.

[Signature Page – Subscription Agreement]

Accepted and agreed:

SUBSCRIBER:

Email Address:

If there are joint investors, please check one:

☐ Joint Tenants with Rights of Survivorship

☐ Tenants-in-Common

☐ Community Property

[Signature Page – Subscription Agreement]

[Signature Page – Subscription Agreement]

Schedule I

ELIGIBILITY REPRESENTATIONS OF THE PURCHASER

FOR ENTITIES:

(Please check the applicable subparagraphs):

** OR **

(Please check the applicable subparagraphs):

* * AND * *

(Please check the applicable box)

THE PURCHASER:

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 Purchaser and constitutes a part of the Purchase Agreement.

I-2

Exhibit 99.3

THIS WARRANT AND THE UNDERLYING SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR UNDER THE SECURITIES LAWS OF ANY STATE. THESE SECURITIES MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT AS PERMITTED UNDER THE ACT AND APPLICABLE STATE SECURITIES LAWS IN ACCORDANCE WITH APPLICABLE REGISTRATION REQUIREMENTS OR AN EXEMPTION THEREFROM. THE ISSUER OF THESE SECURITIES MAY REQUIRE AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE ISSUER THAT SUCH OFFER, SALE, TRANSFER, PLEDGE OR HYPOTHECATION OTHERWISE COMPLIES WITH THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS. THIS WARRANT MUST BE SURRENDERED TO THE COMPANY OR ITS TRANSFER AGENT AS A CONDITION PRECEDENT TO THE SALE, TRANSFER, PLEDGE OR HYPOTHECATION OF ANY INTEREST IN ANY OF THE SECURITIES REPRESENTED HEREBY.

WARRANT TO PURCHASE SHARES OF CLASS A COMMON STOCK

of

RIGETTI COMPUTING, INC.

Dated as of June 30, 2022

Void after the date specified in Section 7

THIS CERTIFIES THAT, for value received, Ampere Computing LLC, or its registered assigns (the “Holder”), is entitled, subject to the provisions and upon the terms and conditions set forth herein, to purchase from Rigetti Computing, Inc., a Delaware corporation (the “Issuer”), shares of the Issuer’s Common Stock, $0.0001 par value per share (the “Warrant Shares”) or such other securities or property issuable in respect of a Reorganization or in connection with a Reclassification, including the Public Company Shares (the “Shares”), in the amounts, at such times and at the price per share set forth in Section 1. The term “Warrant” as used herein shall include this Warrant and any warrants delivered in substitution or exchange therefor as provided herein. This Warrant is issued in connection with the transactions described in the Warrant Subscription Agreement, dated as of October 6, 2021, by and among the Issuer and the purchasers described therein (as amended, the “Subscription Agreement”) and that certain Agreement and Plan of Merger by and among the Issuer (f/k/a Supernova Partners Acquisition Company II, Ltd.), Supernova Merger Sub, Inc., a Delaware corporation and direct, wholly owned subsidiary of the Issuer (“First Merger Sub”), Supernova Romeo Merger Sub, LLC, a Delaware limited liability company and direct, wholly owned subsidiary of the Issuer (“Second Merger Sub”), dated as of October 6, 2021 (the “Merger Agreement”), pursuant to which, subject to the terms and conditions set forth in the Merger Agreement, (i) the Issuer domesticated as a Delaware corporation in accordance with Section 388 of the Delaware General Corporation Law and the applicable provisions of the Cayman Islands Companies Act (2021 Revision) (such deregistration and domestication, including all matters necessary or ancillary in order to effect such domestication, the “Domestication”) and (ii) First Merger Sub merged with and into Rigetti Holdings, Inc. (“Legacy Rigetti”), with the Legacy Rigetti surviving such merger as a wholly owned subsidiary of the Issuer and following such merger, Legacy Rigetti merged with and into Second Merger Sub, with Second Merger Sub surviving such merger as a wholly owned subsidiary of the Issuer (the “Acquisition”). The holder of this Warrant is subject to the terms and provisions set forth in the Subscription Agreement and the Merger Agreement. Defined terms used but not otherwise defined herein shall have the respective meanings ascribed thereto in the Subscription Agreement.

The following is a statement of the rights of the Holder and the conditions to which this Warrant is subject, and to which Holder, by acceptance of this Warrant, agrees:

1. Number and Price of Shares; Exercise Period.

(a) Number of Shares. Subject to any previous exercise of the Warrant, the Holder shall have the right to purchase up to the number of Shares first set forth above, as may be adjusted pursuant hereto, prior to (or in connection with) the expiration of this Warrant as provided in Section 7; provided, that this Warrant shall (i) not be exercisable, in whole or in part, prior to the commencement of the applicable Exercise Period, (ii) this Warrant shall be exercisable for 500,000 Shares, subject to the payment of the Tranche 1 Warrant Purchase Price in accordance with the Subscription Agreement (the “Tranche 1 Shares”), and (iii) this Warrant shall be exercisable for an additional 500,000 Shares, subject to the payment of the Tranche 2 Warrant Purchase Price in accordance with the Subscription Agreement (the “Tranche 2 Shares”).

(b) Exercise Price. The exercise price per Share shall be equal to $0.0001, subject to adjustment pursuant hereto (the “Exercise Price”).

(c) Exercise Period.

(i) This Warrant shall be exercisable with respect to the Tranche 1 Shares from and after the last to occur of (A) the consummation of the Acquisition and (B) the payment in full of the Tranche 1 Warrant Purchase Price in accordance with the Subscription Agreement, until the expiration of this Warrant as set forth in Section 7 (the “Tranche 1 Exercise Period”).

(ii) This Warrant shall be exercisable with respect to the Tranche 2 Shares from and after the last to occur of (A) the consummation of the Acquisition and (B) the payment in full of the Tranche 2 Warrant Purchase Price in accordance with the Subscription Agreement, until the expiration of this Warrant as set forth in Section 7 (the “Tranche 2 Exercise Period” and together with the Tranche 1 Exercise Period, the “Exercise Period”).

2. Exercise of the Warrant.

(a) Exercise. The purchase rights represented by this Warrant may be exercised at the election of the Holder, in whole, at any time during the Exercise Period, in accordance with Section 1, by:

(i) the tender to the Issuer or, following a Reorganization including the Acquisition, the applicable successor, acquirer or parent entity resulting from such Reorganization (such entity, which shall Supernova with respect to the Acquisition, the “Company”) at its principal office (or such other office or agency as the Company may designate) of a notice of exercise in the form of Exhibit A (the “Notice of Exercise”), duly completed and executed by or on behalf of the Holder, together with the surrender of this Warrant; and

(ii) the payment to the Company of an amount equal to (x) the Exercise Price multiplied by (y) the number of Shares being purchased, by wire transfer or certified, cashier’s or other check acceptable to the Company and payable to the order of the Company.

(b) Net Issue Exercise. In lieu of exercising this Warrant pursuant to Section 2(a)(ii), if the fair market value of one Share is greater than the Exercise Price (at the date of calculation as set forth below), the Holder may elect to receive a number of Shares equal to the value of this Warrant (or of any portion of this Warrant being canceled) by surrender of this Warrant at the principal office of the Company

(or such other office or agency as the Company may designate) together with a properly completed and executed Notice of Exercise reflecting such election, in which event the Company shall issue to the Holder that number of Shares computed using the following formula:

Where:

For purposes of the calculation above, the fair market value of one Share shall be determined by the Board of Directors of the Company, acting in good faith.

(c) Stock Certificates. The rights under this Warrant shall be deemed to have been exercised and the Shares issuable upon such exercise shall be deemed to have been issued immediately prior to the close of business on the date this Warrant is exercised in accordance with its terms, and the person entitled to receive the Shares issuable upon such exercise shall be treated for all purposes as the holder of record of such Shares as of the close of business on such date. As promptly as reasonably practicable on or after such date, the Company shall issue and deliver to the person or persons entitled to receive the same a certificate or certificates, which may be in electronic form (or a notice of issuance of uncertificated shares, if applicable) for that number of shares issuable upon such exercise.

(d) No Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of the rights under this Warrant. In lieu of such fractional share to which the Holder would otherwise be entitled, the Company shall make a cash payment equal to the Exercise Price multiplied by such fraction.

(e) Automatic Exercise. If the Holder of this Warrant has not elected to exercise this Warrant prior to expiration of this Warrant pursuant to Section 7, then this Warrant shall automatically (without any act on the part of the Holder) be exercised pursuant to Section 2(b) effective immediately prior to the expiration of the Warrant to the extent such net issue exercise would result in the issuance of Shares; provided, that if the exercise of all or any portion of the Warrant is to be made in connection with the Business Combination or any other transaction or event, such exercise may, at the election of the Holder, be conditioned upon consummation of such transaction or event in which case such exercise shall not be deemed effective until the consummation of such transaction or event. Holder may rescind the exercise of this Warrant at any time prior to the consummation of such transaction or event. If this Warrant is automatically exercised, the Company shall notify the Holder of the automatic exercise as soon as reasonably practicable, and the Holder shall surrender the Warrant to the Company in accordance with the terms hereof.

(f) Reservation of Stock. The Issuer shall take all reasonable action to reserve and keep available from its authorized and unissued shares of common stock for the purpose of effecting the exercise of this Warrant such number of shares as shall from time to time be sufficient to effect the exercise of the rights under this Warrant; and if at any time the number of authorized but unissued shares of common stock shall not be sufficient for purposes of the exercise of this Warrant in accordance with its terms, without limitation of such other remedies as may be available to the Holder, the Company will use all reasonable efforts to take such corporate action as may be necessary to increase its authorized and unissued shares of its common stock to a number of shares as shall be sufficient for such purposes.

3. Replacement of the Warrant. Subject to the receipt of evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant and, in the case of loss, theft or destruction, on delivery of an indemnity agreement reasonably satisfactory in form and substance to the Company or, in the case of mutilation, on surrender and cancellation of this Warrant, the Company at the expense of the Holder shall execute and deliver, in lieu of this Warrant, a new warrant of like tenor and amount.

4. Transfer of the Warrant.

(a) Warrant Register. The Company shall maintain a register (the “Warrant Register”) containing the name and address of the Holder or Holders. Until this Warrant is transferred on the Warrant Register in accordance herewith, the Company may treat the Holder as shown on the Warrant Register as the absolute owner of this Warrant for all purposes, notwithstanding any notice to the contrary. Any Holder of this Warrant (or of any portion of this Warrant) may change its address as shown on the Warrant Register by written notice to the Company requesting a change.

(b) Warrant Agent. The Company may appoint an agent for the purpose of maintaining the Warrant Register referred to in Section 4(a), issuing the Shares or other securities then issuable upon the exercise of the rights under this Warrant, exchanging this Warrant, replacing this Warrant or conducting related activities.

(c) Transferability of the Warrant. Subject to the provisions of this Warrant with respect to compliance with the Securities Act of 1933, as amended (the “Securities Act”) and limitations on assignments and transfers, including without limitation compliance with the restrictions on transfer set forth in Section 5, title to this Warrant may be transferred by endorsement (by the transferor and the transferee executing the assignment form attached as Exhibit B (the “Assignment Form”)) and delivery in the same manner as a negotiable instrument transferable by endorsement and delivery.

(d) Exchange of the Warrant upon a Transfer. On surrender of this Warrant (and a properly endorsed Assignment Form) for exchange, subject to the provisions of this Warrant with respect to compliance with the Securities Act and limitations on assignments and transfers, the Company shall issue to or on the order of the Holder a new warrant or warrants of like tenor, in the name of the Holder or as the Holder (on payment by the Holder of any applicable transfer taxes) may direct, for the number of shares issuable upon exercise hereof, and the Company shall register any such transfer upon the Warrant Register. This Warrant (and the securities issuable upon exercise of the rights under this Warrant) must be surrendered to the Company or its warrant or transfer agent, as applicable, as a condition precedent to the sale, pledge, hypothecation or other transfer of any interest in any of the securities represented hereby.

(e) Taxes. In no event shall the Company be required to pay any tax which may be payable in respect of any transfer involved in the issue and delivery of any certificate, or a book entry, in a name other than that of the Holder, and the Company shall not be required to issue or deliver any such certificate, or make such book entry, unless and until the person or persons requesting the issue or entry thereof shall have paid to the Company the amount of such tax or shall have established to the satisfaction of the Company that such tax has been paid or is not payable.

5. Restrictions on Transfer of the Warrant and Shares; Compliance with Securities Laws. By acceptance of this Warrant, the Holder agrees to comply with the following:

(a) Restrictions on Transfers. Except as otherwise set forth herein and subject to Section 5(b), this Warrant may be transferred or assigned by the Holder, only in whole and not in part, without the consent of the Company, provided that the Holder provides the Company with notice of such transfer. Any transfer of this Warrant or the Shares (the “Securities”) must be in compliance with all applicable federal and state securities laws. The Holder agrees not to make any sale, assignment, transfer, pledge or other disposition of all or any portion of the Securities, or any beneficial interest therein, unless and until the transferee thereof has agreed in writing for the benefit of the Company to take and hold such Securities subject to, and to be bound by, the terms and conditions set forth in this Warrant to the same extent as if the transferee were the original Holder hereunder, and

(i) there is then in effect a registration statement under the Securities Act covering such proposed disposition and such disposition is made in accordance with such registration statement, or

(ii) (A) such Holder shall have given prior written notice to the Company of such Holder’s intention to make such disposition and shall have furnished the Company with a detailed description of the manner and circumstances of the proposed disposition, (B) the transferee shall have confirmed to the satisfaction of the Company in writing, substantially in the form of Exhibit A-1, that the Securities are being acquired (i) solely for the transferee’s own account and not as a nominee for any other party, (ii) for investment and (iii) not with a view toward distribution or resale, and shall have confirmed such other matters related thereto as may be reasonably requested by the Company, and (C) if requested by the Company, such Holder shall have furnished the Company, at the Holder’s expense, with (i) an opinion of counsel, reasonably satisfactory to the Company, to the effect that such disposition will not require registration of such Securities under the Securities Act or (ii) a “no action” letter from the Securities and Exchange Commission to the effect that the transfer of such Securities without registration will not result in a recommendation by the staff of the Securities and Exchange Commission that action be taken with respect thereto, whereupon such Holder shall be entitled to transfer such Securities in accordance with the terms of the notice delivered by the Holder to the Company. It is agreed that the Company will not require opinions of counsel for transactions made pursuant to Rule 144 except in unusual circumstances.

(b) Permitted Transfers. Permitted transfers with respect to Section 5(a) include (i) a transfer not involving a change in beneficial ownership, or (ii) transactions involving the distribution without consideration of Securities by any Holder to (x) a parent, subsidiary or other affiliate of a Holder that is a corporation, (y) any of the Holder’s partners, members or other equity owners, or retired partners or members, or to the estate of any of its partners, members or other equity owners or retired partners or members, or (z) a venture capital fund that is controlled by or under common control with one or more general partners or managing members of, or shares the same management company with, the Holder; provided, in each case, that the Holder shall give written notice to the Company of the Holder’s intention to effect such disposition and shall have furnished the Company with a detailed description of the manner and circumstances of the proposed disposition.

(c) Investment Representation Statement. Unless the rights under this Warrant are exercised pursuant to an effective registration statement under the Securities Act that includes the Shares with respect to which the Warrant was exercised, it shall be a condition to any exercise of the rights under this Warrant that the Holder shall have confirmed to the satisfaction of the Company in writing,

substantially in the form of Exhibit A-1, that the Shares so purchased are being acquired solely for the Holder’s own account and not as a nominee for any other party, for investment and not with a view toward distribution or resale and that the Holder shall have confirmed such other matters related thereto as may be reasonably requested by the Company.

(d) Securities Law Legend. Each certificate, instrument or book entry representing the Securities shall (unless otherwise permitted by the provisions of this Warrant) be notated with a legend substantially similar to the following (in addition to any legend required by the Company’s bylaws, any agreements under which the Holder is bound, or applicable state securities laws):

THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR UNDER THE SECURITIES LAWS OF CERTAIN STATES. THESE SECURITIES MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT AS PERMITTED UNDER THE ACT AND APPLICABLE STATE SECURITIES LAWS IN ACCORDANCE WITH APPLICABLE REGISTRATION REQUIREMENTS OR AN EXEMPTION THEREFROM. THE ISSUER OF THESE SECURITIES MAY REQUIRE AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE ISSUER THAT SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION OTHERWISE COMPLIES WITH THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS. THIS CERTIFICATE MUST BE SURRENDERED TO THE COMPANY OR ITS TRANSFER AGENT AS A CONDITION PRECEDENT TO THE SALE, TRANSFER, PLEDGE OR HYPOTHECATION OF ANY INTEREST IN ANY OF THE SECURITIES REPRESENTED HEREBY.

(e) Additional Legends. Each certificate, instrument or book entry representing the Shares issued upon exercise hereof shall also be notated with a legend in substantially the following form:

THE SECURITIES REPRESENTED HEREBY ARE SUBJECT TO RESTRICTIONS ON TRANSFERABILITY AND RESALE AS SET FORTH IN THE WARRANT PURSUANT TO WHICH THESE SHARES WERE ISSUED, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE COMPANY.

(f) Instructions Regarding Transfer Restrictions. The Holder consents to the Company making a notation on its records and giving instructions to any transfer agent in order to implement the restrictions on transfer established in this Section 5.

(g) Removal of Legend. The legend referring to federal and state securities laws identified in Section 5(d) notated on any certificate evidencing the Shares and the stock transfer instructions and record notations with respect to such securities shall be removed, and the Company shall issue a certificate without such legend to the holder of such securities (to the extent the securities are certificated), if (i) such securities are registered under the Securities Act, or (ii) such holder provides the Company with an opinion of counsel reasonably acceptable to the Company to the effect that a sale or transfer of such securities may be made without registration, qualification or legend.

(h) No Transfers to Bad Actors; Notice of Bad Actor Status. The Holder agrees not to sell, assign, transfer, pledge or otherwise dispose of any securities of the Company, or any beneficial interest therein, to any person (other than the Company) unless and until the proposed transferee confirms to the reasonable satisfaction of the Company that neither the proposed transferee nor any of its directors, executive officers, other officers that may serve as a director or officer of any company in which it invests, general partners or managing members nor any person that would be deemed a beneficial owner of those securities (in accordance with Rule 506(d) of the Securities Act) is subject to any of the “bad actor”

disqualifications described in Rule 506(d)(1)(i) through (viii) under the Securities Act, except as set forth in Rule 506(d)(2)(ii) or (iii) or (d)(3) under the Securities Act and disclosed, reasonably in advance of the transfer, in writing in reasonable detail to the Company. The Holder will promptly notify the Company in writing if the Holder or, to the Holder’s knowledge, any person specified in Rule 506(d)(1) under the Securities Act becomes subject to any of the “bad actor” disqualifications described in Rule 506(d)(1)(i) through (viii) under the Securities Act.

6. Adjustments. Subject to the expiration of this Warrant pursuant to Section 7, the number and kind of shares purchasable hereunder and the Exercise Price therefor are subject to adjustment from time to time, as follows:

(a) Merger or Reorganization. If at any time there shall be any reorganization, recapitalization, merger or consolidation, including the Business Combination (a “Reorganization”) involving the Company (other than as otherwise provided for herein or as would cause the expiration of this Warrant under Section 7) in which shares of the Company’s stock are converted into or exchanged for securities, cash or other property, then, as a part of such Reorganization, lawful provision shall be made so that the Holder shall thereafter be entitled to receive upon exercise of this Warrant, the kind and amount of securities, cash or other property of the successor corporation resulting from such Reorganization, equivalent in value to that which a holder of the Shares deliverable upon exercise of this Warrant would have been entitled in such Reorganization if the right to purchase the Shares hereunder had been exercised immediately prior to such Reorganization, subject to Section 6(b) with respect to the Business Combination. In any such case, appropriate adjustment (as determined in good faith by the Board of Directors of the successor corporation) shall be made in the application of the provisions of this Warrant with respect to the rights and interests of the Holder after such Reorganization to the end that the provisions of this Warrant shall be applicable after the event, as near as reasonably may be, in relation to any shares or other securities deliverable after that event upon the exercise of this Warrant.

(b) Business Combination. Subject to and effective upon the consummation of the Business Combination in accordance with the Merger Agreement, Supernova shall assume this Warrant and this Warrant shall thereafter be exercisable for shares of shares of common stock, par value $0.0001 per share, of Supernova, after the Domestication as a corporation incorporated in the State of Delaware (the “Public Company Shares”) at the Exercise Price specified herein, with respect to the applicable number of Shares specified herein, during the Exercise Period.

(c) Reclassification of Shares. If the securities issuable upon exercise of this Warrant are changed into the same or a different number of securities of any other class or classes by reclassification, capital reorganization or otherwise (other than the Business Combination or as otherwise provided for herein) (a “Reclassification”), then, in any such event, in lieu of the number of Shares which the Holder would otherwise have been entitled to receive, the Holder shall have the right thereafter to exercise this Warrant for a number of shares of such other class or classes of stock that a holder of the number of securities deliverable upon exercise of this Warrant immediately before that change would have been entitled to receive in such Reclassification, all subject to further adjustment as provided herein with respect to such other shares.

(d) Subdivisions and Combinations. In the event that the outstanding shares of common stock are subdivided (by stock split, by payment of a stock dividend or otherwise but other than the Business Combination or as otherwise provided for herein) into a greater number of shares of such securities, the number of Shares issuable upon exercise of the rights under this Warrant immediately prior to such subdivision shall, concurrently with the effectiveness of such subdivision, be proportionately increased, and the Exercise Price shall be proportionately decreased, and in the event that the outstanding shares of common stock are combined (by reclassification or otherwise) into a lesser number of shares of such securities, the number of Shares issuable upon exercise of the rights under this Warrant immediately prior to such combination shall, concurrently with the effectiveness of such combination, be proportionately decreased, and the Exercise Price shall be proportionately increased.

(e) Notice of Adjustments. Upon any adjustment in accordance with this Section 6, the Company shall give notice thereof to the Holder, which notice shall state the event giving rise to the adjustment, the Exercise Price as adjusted and the number of securities or other property purchasable upon the exercise of the rights under this Warrant, setting forth in reasonable detail the method of calculation of each. The Company shall, upon the written request of any Holder, furnish or cause to be furnished to such Holder a certificate setting forth (i) such adjustments, (ii) the Exercise Price at the time in effect and (iii) the number of securities and the amount, if any, of other property that at the time would be received upon exercise of this Warrant.

7. Expiration of the Warrant. This Warrant shall expire and shall no longer be exercisable as of the earlier of:

(a) 5:00 p.m., Eastern time, on the tenth anniversary of the execution of the Subscription Agreement;

(b) The termination of the Merger Agreement in accordance with its terms prior to the consummation of the Acquisition;

(c) The termination of the Subscription Agreement in accordance with its terms;

(d) The Holder breaches any of its obligations under the Subscription Agreement and, if curable, fails to cure such breach within ten (10) business days’ notice of such breach by the Company; or

(e) A Liquidation Event (as defined in the Issuer’s Amended and Restated Certificate of Incorporation, as may be amended from time to time).

8. No Rights as a Stockholder. Nothing contained herein shall entitle the Holder to any rights as a stockholder of the Company or to be deemed the holder of any securities that may at any time be issuable on the exercise of the rights hereunder for any purpose nor shall anything contained herein be construed to confer upon the Holder, as such, any right to vote for the election of directors or upon any matter submitted to stockholders at any meeting thereof, or to give or withhold consent to any corporate action (whether upon any recapitalization, issuance of stock, reclassification of stock, change of par value or change of stock to no par value, consolidation, merger, conveyance or otherwise) or to receive notice of meetings, or to receive dividends or subscription rights or any other rights of a stockholder of the Company until the rights under the Warrant shall have been exercised and the Shares purchasable upon exercise of the rights hereunder shall have become deliverable as provided herein.

9. Reserved.

10. Representations and Warranties of the Holder. By acceptance of this Warrant, the Holder represents and warrants to the Company as follows:

(a) No Registration. The Holder understands that the Securities have not been, and will not be, registered under the Securities Act by reason of a specific exemption from the registration provisions of the Securities Act, the availability of which depends upon, among other things, the bona fide nature of the investment intent and the accuracy of the Holder’s representations as expressed herein or otherwise made pursuant hereto.

(b) Investment Intent. The Holder is acquiring the Securities for investment for its own account, not as a nominee or agent, and not with a view to, or for resale in connection with, any distribution thereof. The Holder has no present intention of selling, granting any participation in, or otherwise distributing the Securities, nor does it have any contract, undertaking, agreement or arrangement for the same.

(c) Investment Experience. The Holder has substantial experience in evaluating and investing in private placement transactions of securities in companies similar to the Company, and has such knowledge and experience in financial or business matters so that it is capable of evaluating the merits and risks of its investment in the Company and protecting its own interests.

(d) Speculative Nature of Investment. The Holder understands and acknowledges that the Company has a limited financial and operating history and that its investment in the Company is highly speculative and involves substantial risks. The Holder can bear the economic risk of its investment and is able, without impairing its financial condition, to hold the Securities for an indefinite period of time and to suffer a complete loss of its investment.

(e) Access to Data. The Holder has had an opportunity to ask questions of officers of the Company, which questions were answered to its satisfaction. The Holder believes that it has received all the information that it considers necessary or appropriate for deciding whether to acquire the Securities. The Holder understands that any such discussions, as well as any information issued by the Company, were intended to describe certain aspects of the Company’s business and prospects, but were not necessarily a thorough or exhaustive description. The Holder acknowledges that any business plans prepared by the Company have been, and continue to be, subject to change and that any projections included in such business plans or otherwise are necessarily speculative in nature, and it can be expected that some or all of the assumptions underlying the projections will not materialize or will vary significantly from actual results.

(f) Accredited Investor. The Holder is an “accredited investor” within the meaning of Regulation D, Rule 501(a), promulgated by the Securities and Exchange Commission and agrees to submit to the Company such further assurances of such status as may be reasonably requested by the Company. The Holder has furnished or made available any and all information requested by the Company or otherwise necessary to satisfy any applicable verification requirements as to “accredited investor” status. Any such information is true, correct, timely and complete.

(g) Residency. The residency of the Holder (or, in the case of a partnership or corporation, such entity’s principal place of business) is correctly set forth on the signature page hereto.

(h) Restrictions on Resales. The Holder acknowledges that the Securities must be held indefinitely unless subsequently registered under the Securities Act or an exemption from such registration is available. The Holder is aware of the provisions of Rule 144 promulgated under the Securities Act, which permit resale of shares purchased in a private placement subject to the satisfaction of certain conditions, which may include, among other things, the availability of certain current public information about the Company; the resale occurring not less than a specified period after a party has purchased and paid for the security to be sold; the number of shares being sold during any three-month period not exceeding specified limitations; the sale being effected through a “broker’s transaction,” a transaction directly with a “market maker” or a “riskless principal transaction” (as those terms are defined in the Securities Act or the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder); and the filing of a Form 144 notice, if applicable. The Holder acknowledges and understands that the Company may not

be satisfying the current public information requirement of Rule 144 at the time the Holder wishes to sell the Securities and that, in such event, the Holder may be precluded from selling the Securities under Rule 144 even if the other applicable requirements of Rule 144 have been satisfied. The Holder further acknowledges that Rule 144 may not be available with respect to the Public Company Shares for at least one year following closing due to the restrictions on use of Rule 144 in connection with sales of securities by former blank-check companies. The Holder acknowledges that, in the event the applicable requirements of Rule 144 are not met, registration under the Securities Act or an exemption from registration will be required for any disposition of the Securities. The Holder understands that, although Rule 144 is not exclusive, the Securities and Exchange Commission has expressed its opinion that persons proposing to sell restricted securities received in a private offering other than in a registered offering or pursuant to Rule 144 will have a substantial burden of proof in establishing that an exemption from registration is available for such offers or sales and that such persons and the brokers who participate in the transactions do so at their own risk.

(i) No Public Market. The Holder understands and acknowledges that no public market now exists for any of the securities issued by the Company and that the Company has made no assurances that a public market will ever exist for the Company’s securities.

(j) Brokers and Finders. The Holder has not engaged any brokers, finders or agents in connection with the Securities, and the Company has not incurred nor will incur, directly or indirectly, as a result of any action taken by the Holder, any liability for brokerage or finders’ fees or agents’ commissions or any similar charges in connection with the Securities.

(k) Legal Counsel. The Holder has had the opportunity to review this Warrant, the exhibits and schedules attached hereto and the transactions contemplated by this Warrant with its own legal counsel. The Holder is not relying on any statements or representations of the Company or its agents for legal advice with respect to this investment or the transactions contemplated by this Warrant.

(l) Tax Advisors. The Holder has reviewed with its own tax advisors the U.S. federal, state and local and non-U.S. tax consequences of this investment and the transactions contemplated by this Warrant. With respect to such matters, the Holder relies solely on any such advisors and not on any statements or representations of the Company or any of its agents, written or oral. The Holder understands that it (and not the Company) shall be responsible for its own tax liability that may arise as a result of this investment and the transactions contemplated by this Warrant.

(m) No “Bad Actor” Disqualification. Neither (i) the Holder, (ii) any of its directors, executive officers, other officers that may serve as a director or officer of any company in which it invests, general partners or managing members, nor (iii) any beneficial owner of any of the Company’s voting equity securities (in accordance with Rule 506(d) of the Securities Act) held by the Holder is subject to any of the “bad actor” disqualifications described in Rule 506(d)(1)(i) through (viii) under the Securities Act, except as set forth in Rule 506(d)(2)(ii) or (iii) or (d)(3) under the Securities Act and disclosed, reasonably in advance of the acceptance of this Warrant, in writing in reasonable detail to the Company.

11. Miscellaneous.

(a) Amendments. This Warrant and any term hereof may be amended or waived with the written consent of the Company and Holder.

(b) Waivers. No waiver of any single breach or default shall be deemed a waiver of any other breach or default theretofore or thereafter occurring.

(c) Notices. All notices and other communications required or permitted hereunder shall be in writing and shall be mailed by registered or certified mail, postage prepaid, sent by electronic mail (if to the Holder) or otherwise delivered by hand, messenger or courier service addressed:

(i) if to the Holder, to the Holder at the Holder’s address or electronic mail address as shown in the Company’s records, as may be updated in accordance with the provisions hereof, or until any such Holder so furnishes an address or electronic mail address to the Company, then to and at the address or electronic mail address of the last holder of this Warrant for which the Company has contact information in its records; or

(ii) if to the Company, to the attention of the President or Chief Financial Officer of the Company at the Company’s address as shown on the signature page hereto, or at such other current address as the Company shall have furnished to the Holder.

Each such notice or other communication shall for all purposes of this Warrant be treated as effective or having been given (i) if delivered by hand, messenger or courier service, when delivered (or if sent via a nationally-recognized overnight courier service, freight prepaid, specifying next-business-day delivery, one business day after deposit with the courier), or (ii) if sent via mail, at the earlier of its receipt or five days after the same has been deposited in a regularly-maintained receptacle for the deposit of the United States mail, addressed and mailed as aforesaid, or (iii) if sent via electronic mail, upon confirmation of delivery when directed to the relevant electronic mail address, if sent during normal business hours of the recipient, or if not sent during normal business hours of the recipient, then on the recipient’s next business day. In the event of any conflict between the Company’s books and records and this Warrant or any notice delivered hereunder, the Company’s books and records will control absent fraud or error.

(d) Governing Law. This Warrant and all actions arising out of or in connection with this Warrant shall be governed by and construed in accordance with the laws of the State of Delaware, without regard to the conflicts of law provisions of the State of Delaware, or of any other state.

(e) Jurisdiction and Venue. Each of the Holder and the Company irrevocably consents to the exclusive jurisdiction of the Delaware Court of Chancery (and appellate courts from such court), in connection with any matter based upon or arising out of this Warrant or the matters contemplated herein, and agrees that process may be served upon them in any manner authorized by the laws of the Delaware for such persons.

(f) Titles and Subtitles. The titles and subtitles used in this Warrant are used for convenience only and are not to be considered in construing or interpreting this Warrant. All references in this Warrant to sections, paragraphs and exhibits shall, unless otherwise provided, refer to sections and paragraphs hereof and exhibits attached hereto.

(g) Severability. If any provision of this Warrant becomes or is declared by a court of competent jurisdiction to be illegal, unenforceable or void, portions of such provision, or such provision in its entirety, to the extent necessary, shall be severed from this Warrant, and such illegal, unenforceable or void provision shall be replaced with a valid and enforceable provision that will achieve, to the extent possible, the same economic, business and other purposes of the illegal, unenforceable or void provision. The balance of this Warrant shall be enforceable in accordance with its terms.

(h) Waiver of Jury Trial. EACH OF THE HOLDER AND THE COMPANY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR RELATED TO THIS WARRANT.

(i) Rights and Obligations Survive Exercise of the Warrant. Except as otherwise provided herein, the rights and obligations of the Company and the Holder under this Warrant shall survive exercise of this Warrant.

(j) Entire Agreement. Except as expressly set forth herein, this Warrant (including the exhibits attached hereto) constitutes the entire agreement and understanding of the Company and the Holder with respect to the subject matter hereof and supersede all prior agreements and understandings relating to the subject matter hereof.

(signature page follows)

The Company and the Holder sign this Warrant as of the date stated on the first page.

(Signature Page to Warrant to Purchase Shares of Common Stock of Rigetti Computing, Inc.)

The Company and the Holder sign this Warrant as of the date stated on the first page.

AGREED AND ACKNOWLEDGED,

AMPERE COMPUTING LLC

(Signature Page to Warrant to Purchase Shares of Common Stock of Rigetti Computing, Inc.)

EXHIBIT A

NOTICE OF EXERCISE

(signature page follows)

A-1

(Signature page to the Notice of Exercise)

A-2

EXHIBIT A-l

INVESTMENT REPRESENTATION STATEMENT

In connection with the purchase or acquisition of the above-listed Securities, the undersigned Investor represents and warrants to, and agrees with, the Company as follows:

1. No Registration. The Investor understands that the Securities have not been, and will not be, registered under the Securities Act of 1933, as amended (the “Securities Act”), by reason of a specific exemption from the registration provisions of the Securities Act, the availability of which depends upon, among other things, the bona fide nature of the investment intent and the accuracy of the Investor’s representations as expressed herein or otherwise made pursuant hereto.

2. Investment Intent. The Investor is acquiring the Securities for investment for its own account, not as a nominee or agent, and not with a view to, or for resale in connection with, any distribution thereof. The Investor has no present intention of selling, granting any participation in, or otherwise distributing the Securities, nor does it have any contract, undertaking, agreement or arrangement for the same.

3. Investment Experience. The Investor has substantial experience in evaluating and investing in private placement transactions of securities in companies similar to the Company, and has such knowledge and experience in financial or business matters so that it is capable of evaluating the merits and risks of its investment in the Company and protecting its own interests.

4. Speculative Nature of Investment. The Investor understands and acknowledges that the Company has a limited financial and operating history and that its investment in the Company is highly speculative and involves substantial risks. The Investor can bear the economic risk of its investment and is able, without impairing its financial condition, to hold the Securities for an indefinite period of time and to suffer a complete loss of its investment.

5. Access to Data. The Investor has had an opportunity to ask questions of officers of the Company, which questions were answered to its satisfaction. The Investor believes that it has received all the information that it considers necessary or appropriate for deciding whether to acquire the Securities. The Investor understands that any such discussions, as well as any information issued by the Company, were intended to describe certain aspects of the Company’s business and prospects, but were not necessarily a thorough or exhaustive description. The Investor acknowledges that any business plans prepared by the Company have been, and continue to be, subject to change and that any projections included in such business plans or otherwise are necessarily speculative in nature, and it can be expected that some or all of the assumptions underlying the projections will not materialize or will vary significantly from actual results.

A-1-1

6. Accredited Investor. The Investor is an “accredited investor” within the meaning of Regulation D, Rule 501(a), promulgated by the Securities and Exchange Commission and agrees to submit to the Company such further assurances of such status as may be reasonably requested by the Company. The Investor has furnished or made available any and all information requested by the Company or otherwise necessary to satisfy any applicable verification requirements as to “accredited investor” status. Any such information is true, correct, timely and complete.

7. Residency. The residency of the Investor (or, in the case of a partnership or corporation, such entity’s principal place of business) is correctly set forth on the signature page hereto.

8. Restrictions on Resales. The Investor acknowledges that the Securities must be held indefinitely unless subsequently registered under the Securities Act or an exemption from such registration is available. The Investor is aware of the provisions of Rule 144 promulgated under the Securities Act, which permit resale of shares purchased in a private placement subject to the satisfaction of certain conditions, which may include, among other things, the availability of certain current public information about the Company; the resale occurring not less than a specified period after a party has purchased and paid for the security to be sold; the number of shares being sold during any three-month period not exceeding specified limitations; the sale being effected through a “broker’s transaction,” a transaction directly with a “market maker” or a “riskless principal transaction” (as those terms are defined in the Securities Act or the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder); and the filing of a Form 144 notice, if applicable. The Investor acknowledges and understands that the Company may not be satisfying the current public information requirement of Rule 144 at the time the Investor wishes to sell the Securities and that, in such event, the Investor may be precluded from selling the Securities under Rule 144 even if the other applicable requirements of Rule 144 have been satisfied. The Investor understands and acknowledges that, in the event the applicable requirements of Rule 144 are not met, registration under the Securities Act or an exemption from registration will be required for any disposition of the Securities. The Investor understands that, although Rule 144 is not exclusive, the Securities and Exchange Commission has expressed its opinion that persons proposing to sell restricted securities received in a private offering other than in a registered offering or pursuant to Rule 144 will have a substantial burden of proof in establishing that an exemption from registration is available for those offers or sales and that those persons and the brokers who participate in the transactions do so at their own risk.

9. No Public Market. The Holder understands and acknowledges that no public market now exists for any of the securities issued by the Company and that the Company has made no assurances that a public market will ever exist for the Company’s securities.

10. Brokers and Finders. The Investor has not engaged any brokers, finders or agents in connection with the Securities, and the Company has not incurred nor will incur, directly or indirectly, as a result of any action taken by the Investor, any liability for brokerage or finders’ fees or agents’ commissions or any similar charges in connection with the Securities.

11. Legal Counsel. The Investor has had the opportunity to review the Warrant, the exhibits and schedules attached thereto and the transactions contemplated by the Warrant with its own legal counsel. The Investor is not relying on any statements or representations of the Company or its agents for legal advice with respect to this investment or the transactions contemplated by the Warrant.

12. Tax Advisors. The Investor has reviewed with its own tax advisors the U.S. federal, state and local and non-U.S. tax consequences of this investment and the transactions contemplated by the Warrant. With respect to such matters, the Investor relies solely on such advisors and not on any statements or representations of the Company or any of its agents, written or oral. The Investor understands that it (and not the Company) shall be responsible for its own tax liability that may arise as a result of this investment or the transactions contemplated by the Warrant.

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13. No “Bad Actor” Disqualification. Neither (i) the Investor, (ii) any of its directors, executive officers, other officers that may serve as a director or officer of any company in which it invests, general partners or managing members, nor (iii) any beneficial owner of any of the Company’s voting equity securities (in accordance with Rule 506(d) of the Securities Act) held by the Investor is subject to any of the “bad actor” disqualifications described in Rule 506(d)(1)(i) through (viii) under the Securities Act, except as set forth in Rule 506(d)(2)(ii) or (iii) or (d)(3) under the Securities Act and disclosed, reasonably in advance of the purchase or acquisition of the Securities, in writing in reasonable detail to the Company.

(signature page follows)

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The Investor is signing this Investment Representation Statement on the date first written above.

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EXHIBIT B

ASSIGNMENT FORM

Name of Assignee:                                                                                                                                                    

Address of Assignee:                                                                                                                                               

Number of Shares Assigned:                                                                                                                                    

and does irrevocably constitute and appoint ______________________ as attorney to make such transfer on the books of Rigetti Computing, Inc., maintained for the purpose, with full power of substitution in the premises.

(signature page follows)

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Assignor and Assignee are signing this Assignment Form on the date first set forth above.

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