Rigetti SPAC Presentation Deck

Cautionary Notes (continued) Use of Projections - This Presentation contains projected financial information. Such projected financial information constitutes forward-looking information, and is for illustrative purposes only and should not be relied upon as necessarily being indicative of future results. The assumptions and estimates underlying such financial forecast information are inherently uncertain and are subject to a wide variety of significant business, economic, competitive, and other risks and uncertainties. See "Forward-Looking Statements" above. Actual results may differ materially from the results contemplated by the financial forecast information contained in this Presentation, and the inclusion of such information in this Presentation should not be regarded as a representation by any person that the results reflected in such forecasts will be achieved. Use of Data - The data contained herein is derived from various internal and external sources. No representation is made as to the reasonableness of the assumptions made within or the accuracy or completeness of any projections or modeling or any other information contained herein. Any data on past performance or modeling contained herein is not an indication as to future performance. Supernova and Rigetti assume no obligation to update the information in this presentation. Trademarks This presentation contains trademarks, service marks, trade names and copyrights of other companies, which are property of their respective owners. Use of Non-GAAP Financial Metrics and Other Key Financial Metrics - This presentation includes certain non- GAAP financial measures (including on a forward-looking basis) such as EBITDA and EBITDA Margin. Rigetti defines EBITDA as net income (loss), adjusted for interest expense, depreciation and amortization, stock-based compensation and income taxes and one-off non-recurring items. EBITDA Margin is EBITDA divided by total revenue. These non-GAAP measures are an addition, and not a substitute for or superior to measures of financial performance prepared in accordance with GAAP and should not be considered as an alternative to net income, operating income or any other performance measures derived in accordance with GAAP. Reconciliations of non-GAAP measures to their most directly comparable GAAP counterparts are included in the Appendix to this presentation. Rigetti believes that these non-GAAP measures of financial results (including on a forward-looking basis) provide useful supplemental information to investors about Rigetti. Rigetti's management uses forward looking non-GAAP measures to evaluate Rigetti's projected financial and operating performance. However, there are a number of limitations related to the use of these non-GAAP measures and their nearest GAAP equivalents. For example, other companies may calculate non-GAAP measures differently, or may use other measures to calculate their financial performance, and therefore Rigetti's non-GAAP measures may not be directly comparable to similarly titled measures of other companies. Morgan Stanley & Co. LLC (Morgan Stanley) and Deutsche Bank Securities, Inc. (Deutsche Bank) are acting as placement agents in connection with the business combination. In addition, Morgan Stanley is acting as financial advisor to Supernova and Deutsche Bank is acting as financial advisor to Rigetti. Morgan Stanley, Deutsche Bank, their respective affiliates and any of their respective employees, directors, officers, contractors, advisors, members, successors, representatives or agents make no representation or warranty as to the accuracy or completeness of this presentation, and shall have no liability for any representations (expressed or implied) contained in, or for any omissions from, this presentation or any other written or oral communications transmitted to the recipient in the course of its evaluation of Rigetti. The only information that will have any legal effect and upon which an interested 3 party may rely upon will be that in such representations and warranties as may be contained in a definitive agreement between such party and Rigetti relating to a Transaction, if any. Additional Information and Where to Find It - Supernova intends to file a registration statement on Form S-4 with the Securities Exchange Commission (the "SEC"), which will include a proxy statement/prospectus, that will be both the proxy statement to be distributed to holders of Supernova's common shares in connection with its solicitation of proxies for the vote by Supernova's shareholders with respect to the proposed business combination and other matters as may be described in the registration statement, as well as the prospectus relating to the offer and sale of the securities to be issued in the business combination. After the registration statement is declared effective, Supernova will mail a definitive proxy statement/prospectus and other relevant documents to its shareholders. This presentation does not contain all the information that should be considered concerning the proposed business combination and is not intended to form the basis of any investment decision or any other decision in respect of the business combination. Supernova's shareholders and other interested persons are advised to read, when available, the preliminary proxy statement/prospectus included in the registration statement and the amendments thereto and the definitive proxy statement/prospectus and other documents filed in connection with the proposed business combination, as these materials will contain important information about Rigetti, Supernova and the business combination. When available, the definitive proxy statement/prospectus and other relevant materials for the proposed business combination will be mailed to shareholders of Supernova as of a record date to be established for voting on the proposed business combination. Shareholders will also be able to obtain copies of the preliminary proxy statement, the definitive proxy statement and other documents filed with the SEC, without charge, once available, at the SEC's website at www.sec.gov, or by directing a request to Supernova's secretary at 4301 50th Street NW, Suite 300 PMB 1044, Washington, D.C. 20016, (202) 918-7050. Participants in the Solicitation Supernova and its directors and executive officers may be deemed participants in the solicitation of proxies from Supernova's shareholders with respect to the proposed business combination. A list of the names of those directors and executive officers and a description of their interests in Supernova is contained in Supernova's prospectus dated March 3, 2021 relating to its initial public offering, which was filed with the SEC and is available free of charge at the SEC's website at www.sec.gov. To the extent such holdings of Supernova's securities may have changed since that time, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC. Additional information regarding the interests of such participants will be contained in the proxy statement/prospectus for the proposed business combination when available. Rigetti and its directors and executive officers may also be deemed to be participants in the solicitation of proxies from the shareholders of Supernova in connection with the proposed business combination. A list of the names of such directors and executive officers and information regarding their interests in the proposed business combination will be included in the proxy statement/prospectus for the proposed business combination when available. No Offer or Solicitation - This presentation does not constitute (i) a solicitation of a proxy, consent or authorization with respect to any securities or in respect of the proposed business combination or (ii) an offer to sell, a solicitation of an offer to buy, or a recommendation to purchase any security of Supernova, Rigetti, or any of their respective affiliates. rigetti