XCF Global Inc-A美股招股说明书(2026-05-06版)

This prospectus supplement supplements the prospectus dated December 2, 2025, (the “Prospectus”), which forms a part of our registration statement on Form S-1 (No. 333-291024). Thisprospectus supplement is being filed to update and supplement the information in the Prospectus with the information contained in our Form 8-K, filed with the Securities and Exchange Commission(the “SEC”) on May 5, 2026 (the “Form 8-K”). Accordingly, we have attached the Form 8-K to this prospectus supplement. This prospectus supplement should be read in conjunction with theProspectus, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in this prospectus supplement updates or supersedesthe information contained in the Prospectus. Our common stock is listed on The Nasdaq Stock Market under the symbol “SAFX.” On May 5, 2026, the last reported sale price of our common stock was $0.46 per share. You are urged toobtain current market data and should not use the market price as of May 5, 2026, as a prediction of the future market price of our common stock. We are an “emerging growth company” and a “smaller reporting company,” as those terms are defined under the federal securities laws, and as such, have elected to comply with certain reducedpublic company reporting requirements for the registration statement of which this prospectus forms a part and future filings. See “Prospectus Summary – Implications of Being an Emerging GrowthCompany and Smaller Reporting Company” in the Prospectus. Investing in our securities involves significant risk. You should carefully read and consider the information referred to under “Risk Factors” beginning on page 11 of the Prospectusand under similar headings in any amendments or supplements to the Prospectus for a discussion of certain risks that you should consider in connection with an investment in our securities. We may amend or supplement this prospectus from time to time by filing amendments or supplements with the SEC. We urge you to read the entire prospectus, any suchamendments or supplements, any free writing prospectuses we may file with the SEC, and any documents incorporated by reference into this prospectus or any prospectus supplementcarefully before you make your investment decision. Neither the SEC nor any state securities commission has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus. Any representationto the contrary is a criminal offense. The date of this prospectus supplement is May 6, 2026 UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549 FORM 8-K CURRENT REPORTPursuant to Section 13 or Section 15(d)of the Securities Exchange Act of 1934Date of Report (Date of earliest event reported): May 4, 2026 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 or Rule 12b-2 of the Securities Exchange Act of 1934. 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 standardsprovided pursuant to Section 13(a) of the Exchange Act.☐ Item 7.01 Regulation FD. On May 4, 2026, XCF Global, Inc. (“XCF” or the “Company”) updated the Company’s investor presentation (the “Investor Presentation”), attached hereto as Exhibit 99.1. The InvestorPresentation will be available under the “Events and Presentations” tab section of the Company’s website, The information in Item 7.01 of this Current Report (including Exhibit 99.1) is being furnished pursuant to Item 7.01 and shall not be deemed to be “filed” for purposes of Section 18 of theSecurities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed to be incorporated by reference in any filing under the Securities Act of 1933, asamended. Additional Information and Where to Find It In connection with the proposed transaction, among the Company, DevvStream, and Southern, the Company will prepare and file relevant materials with the Securities and ExchangeCommission (the “SEC”), including a registration statement on Form S-4 that will contain a proxy statement of the Company that also constitutes a prospectus (the “Proxy Statement/Prospectus”). Adefinitive Proxy Statement/Prospectus will be mailed to stockholders of the Company. The Company, DevvStream, and Southern may also file other documents with the SEC regarding the proposedtransaction. This communication is not a substitute for any proxy statement, registration statement or prospectus, or any other document that the Company, DevvStream, and Southern (as applicable)may file with the SEC in connection with the proposed transaction. BEFORE MAKING ANY VOTING OR INVESTMENT DECISION, INVESTORS AND SECURITY HOLDE