Blaize Holdings Inc美股招股说明书(2026-03-24版)

89,550,141 Shares of Common Stock898,250 Warrants to Purchase Shares of Common Stock29,698,250 Shares of Common Stock Issuable Upon Exercise of Warrants This prospectus supplement updates, amends and supplements the prospectus dated December 18, 2025 (as supplemented or amendedfrom time to time, the “Prospectus”), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-284365).Capitalized terms used in this prospectus supplement and not otherwise defined herein have the meanings specified in the Prospectus. This prospectus supplement is being filed to update, amend and supplement the information included in the Prospectus withinformation contained in our Annual Report on Form 10-K filed with the SEC on March 24, 2026, which is set forth below. This prospectus supplement is not complete without the Prospectus. This prospectus supplement should be read in conjunction withthe Prospectus, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent thatthe information in this prospectus supplement updates or supersedes the information contained in the Prospectus. Please keep thisprospectus supplement with your Prospectus for future reference. Our Common Stock and Warrants are listed on the Nasdaq Stock Market LLC under the trading symbols “BZAI” and “BZAIW,”respectively. On March 23, 2026, the closing prices for our Common Stock and Warrants on the Nasdaq Stock Market LLC were $1.10per share of Common Stock and $0.30 per Warrant. Investing in our securities involves a high degree of risk. See “Risk Factors” beginning on page 6 of the Prospectus and otherrisk factors contained in the documents incorporated by reference therein for a discussion of information that should beconsidered in connection with an investment in our securities. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of thesesecurities or determined if the Prospectus or this prospectus supplement is truthful or complete. Any representation to thecontrary is a criminal offense. The date of this prospectus supplement is March 24, 2026 FORM 10-K (Mark One) ☒——ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the fiscal year ended December 31, 2025OR———☐——TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934Commission File Number 001-41139 Blaize Holdings, Inc.(Exact name of Registrant as specified in its Charter) Registrant’s telephone number, including area code: (916) 347-0050 Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.Yes☐No☒ Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.Yes☐No☒ Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to suchfiling requirements for the past 90 days.Yes☒No☐ Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submitsuch files).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or anemerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growthcompany” in Rule 12b-2 of the Exchange Act. If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with anynew or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internalcontrol over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm thatprepared or issued its audit report.☐ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included inthe filing reflect the correction of an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensationreceived by any of the registrant’s executive officers during the relevant recovery p