AMASS Brands Inc. 美国 IPO 招股说明书（2026年5月29日版）

PROSPECTUS SUPPLEMENTDated May 29, 2026(To Prospectus Dated May 18, 2026) AMASS BRANDS INC Up to 14,293,298 Shares of Common Stock This prospectus supplement (the “Sticker Supplement”) modifies, supersedes and supplements certain information containedin, and should be read in conjunction with, our Prospectus filed with the SEC dated May 18, 2026 (the “Prospectus”), related to theregistration of the resale of up to 14,293,298 shares of our common stock, par value $0. 00001 per share (“Common Stock”), by ourstockholders identified in the Prospectus (the “Registered Stockholders”) in connection with our direct listing on the Global Market This Sticker Supplement is not complete without, and may not be delivered or used except in connection with, the Prospectus. Our shares of Common Stock are listed on the Nasdaq Global Market under the symbol “AMSS.” The information contained in this Sticker Supplement modifies and supersedes, in part, the information in the Prospectus.Any information that is modified or superseded in the Prospectus shall not be deemed to constitute a part of the Prospectus, except asmodified or superseded by this Sticker Supplement. We may amend or supplement the Prospectus from time to time by filing Investing in our securities involves a high degree of risk. See “Risk Factors” beginning on page 10 of the Prospectusand in documents incorporated by reference into the Prospectus. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved ofthese securities or determined if this Sticker Supplement, or the Prospectus is truthful or complete. Any representation to the FORWARD-LOOKING STATEMENTS You should carefully consider the risk factors set forth in the Prospectus, as well as the other information contained in orincorporated by reference into this Sticker Supplement and the Prospectus. This Sticker Supplement and the Prospectus and documentsincorporated therein by reference contain forward-looking statements regarding events, conditions, and financial trends that may affectour plan of operation, business strategy, operating results, and financial position. You are cautioned that any forward-lookingstatements are not guarantees of future performance and are subject to risks and uncertainties. Actual results may differ materially WARRANT AMENDMENT This Sticker Supplement is being filed to disclose an amendment to the warrant to purchase shares of our Common Stock (the“Warrant”) held by Streeterville Capital, LLC (the “Investor”) issued in connection with that certain Securities Purchase Agreement,dated March 17, 2026, by and between AMASS Brands Inc (the “Company”) and the Investor, as amended by that certain GlobalAmendment dated April 7, 2026. On May 29, 2026, we entered into Amendment No. 1 to the Warrant to Purchase Shares of CommonStock (the “Warrant Amendment”) with the Investor to modify the exercise price of the Warrant to provide for a reduced exercise priceof $5.00 per share for any exercise occurring during the ninety (90) day period commencing on the effective date of the Warrant The date of this Sticker Supplement to Prospectus is May 29, 2026.