Filed Pursuant to Rule 424(b)(3)
Registration No. 333-263798
PROSPECTUS SUPPLEMENT NO. 7
(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 (i) Items 5.02 and 5.03 of our Current Report on Form 8-K filed
with the Securities and Exchange Commission on November 14, 2022 (the First Current Report), (ii) Item 4.02 of our Current Report on Form 8-K filed with the Securities and Exchange
Commission on November 14, 2022 (the Second Current Report and, together with the First Current Report, the Current Reports), (iii) Quarterly Report on Form 10-Q covering
the quarter ended September 30, 2022, filed with the Securities and Exchange Commission on November 22, 2022 (the Quarterly Report for the Third Quarter on Form 10-Q), (iv) Amendment
No. 1 to the Quarterly Report on Form 10-Q covering the quarter ended March 31, 2022, filed with the Securities and Exchange Commission on November 30, 2022 (the Amended Quarterly Report
for the First Quarter on Form 10-Q) and (v) Amendment No. 1 to the Quarterly Report on Form 10-Q covering the quarter ended June 30, 2022, filed
with the Securities and Exchange Commission on November 30, 2022 (the Amended Quarterly Report for the Second Quarter on Form 10-Q and, together with the Amended Quarterly Report for the First
Quarter on Form 10-Q, the Amended Quarterly Reports). Accordingly, we have attached the Current Reports, the Quarterly Report for the Third Quarter on
Form 10-Q and Amended Quarterly Reports to this prospectus supplement.
The Prospectus and this prospectus
supplement relate 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 relate 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 November 30, 2022, the last reported sales price of our common stock was $1.31 per share and the last reported sales price of our public warrants was
$0.1741 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. The Prospectus complies with the requirements that apply to an issuer that is an emerging growth company.