Rigetti Computing, Inc.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

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Preliminary Proxy Statement

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Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

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Definitive Proxy Statement

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Definitive Additional Materials

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Soliciting Material under §240.14a-12

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RIGETTI COMPUTING, INC.

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(Name of Registrant as Specified In Its Charter)

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(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

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No fee required.

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Fee paid previously with preliminary materials.

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Fee computed in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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775 Heinz Avenue

Berkeley, CA 94710

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

To Be Held on June 9, 2026 at 9:00 a.m. Pacific Time

Dear Stockholder:

On behalf of our Board of Directors, it is our pleasure to invite you to attend the 2026 Annual Meeting of Stockholders (the “Annual Meeting”) of Rigetti Computing, Inc., a Delaware corporation.

The Annual Meeting will be held virtually, via live webcast at www.virtualshareholdermeeting.com/RGTI2026, on June 9, 2026 at 9:00 a.m., Pacific Time. We believe hosting a virtual meeting enables increased stockholder participation and improves meeting efficiency and our ability to communicate effectively with our stockholders, while lowering the cost of conducting the Annual Meeting. Stockholders attending the virtual meeting will be afforded the same rights and opportunities to participate as they would at an in-person meeting. You will be able to attend the Annual Meeting, ask your questions and vote your shares during the meeting by visiting www.virtualshareholdermeeting.com/RGTI2026. To participate in the Annual Meeting, you will need to visit www.virtualshareholdermeeting.com/RGTI2026 and enter the 16-digit control number located on the Notice of Internet Availability of Proxy Materials for the 2026 Annual Meeting of Stockholders, your proxy card or voting instruction form. Additional details regarding access to the Annual Meeting and the business to be conducted at the Annual Meeting are described in the accompanying Proxy Statement. We encourage you to attend online and participate. We recommend that you log in a few minutes before 9:00 a.m., Pacific Time, to ensure you are logged in when the Annual Meeting starts. Please refer to the additional logistical details in the accompanying Proxy Statement.

The record date for the Annual Meeting is April 15, 2026. Only stockholders of record at the close of business on that date or their proxyholders may vote at the Annual Meeting or any adjournment thereof. We will commence mailing the proxy materials to our stockholders on or about April 24, 2026, which will contain instructions on how to vote at the Annual Meeting as well as how to access the Proxy Statement and our 2025 Annual Report on Form 10-K.

Your vote is very important. Whether or not you plan to attend the Annual Meeting, we urge you to vote by proxy to ensure your vote is counted.

The Annual Meeting will be held for the following purposes:

To elect one Class I director, Dr. Subodh Kulkarni, to serve until our 2029 Annual Meeting of Stockholders.

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To ratify the selection of BDO USA, P.C. as the independent registered public accounting firm for the Company for the fiscal year ending December 31, 2026.

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To conduct any other business properly brought before the meeting.

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These items of business are more fully described in the Proxy Statement accompanying this Notice, which Proxy Statement is incorporated herein by reference in its entirety.

By Order of the Board of Directors,

Luke Kuipers

Corporate Secretary

Berkeley, CA

April 24, 2026

You are cordially invited to attend the virtual Annual Meeting. Whether or not you expect to attend the Annual Meeting, you are urged to vote and submit your proxy by following the procedures described in the Notice of Internet Availability of Proxy Materials or proxy card. Even if you have voted by proxy, you may still vote during the Annual Meeting. Please note, however, that if your shares are held by a broker, bank or other similar organization and you wish to vote during the Annual Meeting, you must follow the instructions from such organization.