UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT ~~Pursuantto~~Pursuant to Section 13 or 15(d)~~of the Securities Exchange Act of 1934~~

~~Date~~ of ~~Report~~the ~~(Date~~Securities ofExchange ~~earliest~~Act ~~event~~of ~~reported): March 4, 2026~~1934

Date of Report (Date of earliest event reported): March 19, 2026

RIGETTI COMPUTING, INC.

(Exact name of registrant as specified in its charter)

Delaware	~~001-40140~~	88001-~~0950636~~40140	88-0950636
(State or Other Jurisdictionof Incorporation)	(CommissionFile Number)	(I.R.S. EmployerIdentification No.)
(State or other jurisdiction of incorporation)		(Commission File Number)	(I.R.S. Employer Identification No.)

775 Heinz Avenue, Berkeley, California		94710
(Address of principal executive offices)		(Zip Code)

(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:

☐¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐¨ Pre-commencement ~~communications~~communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class	~~ ~~	Trading ~~symbol~~Symbol(s)	~~ ~~	Name of each exchange on which registered
Common Stock, $0.0001 par value per share		RGTI		The Nasdaq Capital Market
Warrants, each whole warrant exercisable for oneshare of Common Stock at an exercise price of$11.50 per share		RGTIW		The Nasdaq Capital Market
Warrants, each whole warrant exercisable for one share of Common Stock at an exercise price of $11.50 per share		RGTIW		The Nasdaq Capital Market

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 ☒ x

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 March 19, 2026, H. Gail Sandford notified Rigetti Computing, Inc. (the “Company”) that she would not stand for re-election to the Board of Directors of the Company (the “Board”) upon the completion of her current term, which expires at the Company’s 2026 Annual Meeting of Stockholders. Ms. Sandford’s decision not to stand for re-election was not due to any disagreement with the Company on any matter relating to the Company’s operations, policies or practices. The Company thanks Ms. Sandford for her commitment and service to the Company.

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.

Item 2.02.Results of Operations and Financial Condition.

Date: March 20, 2026	RIGETTI COMPUTING, INC.

	By:	/s/ Jeffrey Bertelsen
		Jeffrey Bertelsen
		Chief Financial Officer

On March 4, 2026, Rigetti Computing, Inc. (the “Company”) issued a press release announcing its financial results for the three months and year ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K (“Current Report”) and is hereby incorporated by reference.

The information included in Item 2.02 of this Current Report (including Exhibit 99.1 hereto) is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (“Exchange Act”), or otherwise subject to liabilities of that section, and shall not be deemed incorporated by reference into any filing under the Exchange Act or the Securities Act of 1933, as amended (“Securities Act”), except as expressly set forth by specific reference in such filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.		Description
99.1		Press Release issued by Rigetti Computing, Inc. dated March 4, 2026

104		Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

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.

Date: March 4, 2026

RIGETTI COMPUTING, INC. By: /s/ Jeffrey Bertelsen Jeffrey Bertelsen Chief Financial Officer

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