Shimmick Corp 美股招股说明书（2026年5月22日版）

Up to $4,986,750 of Common Stock This prospectus supplement updates and amends certain information contained in the prospectus supplement, dated September8, 2025 and thebase prospectus, dated July10, 2025 (together, the “Prospectus”), relating to the sale of shares of our common stock, par value $0.01 per share (the“Common Stock”) by Shimmick Corporation (the “Company”) from time to time to or through Roth Capital Partners, LLC (the “Sales Agent”), actingas sales agent pursuant to that certain At the Market Offering Agreement, dated September8, 2025, by and between the Company and the Sales Agent This prospectus supplement should be read in conjunction with the Prospectus and is qualified by reference to the Prospectus, except to the extentthat the information presented herein supersedes the information contained in the Prospectus. This prospectus supplement is not complete without, and Under the Prospectus, we initially registered up to $7,800,000 of the Common Stock for offer and sale pursuant to the ATM Agreement. We havenot sold any shares of Common Stock under the Prospectus. We are filing this prospectus supplement to amend the Prospectus to reduce the amount of Investing in our common stock involves risks. See the “Risk Factors” sections on page6 of the base prospectus andin the documents incorporated by reference into this prospectus supplement concerning factors you should consider We are an “emerging growth company” and a “smaller reporting company” as such terms are defined under the federal securities laws and, assuch, are subject to certain reduced public company reporting requirements. Our Common Stock is listed on the Nasdaq under the symbol “SHIM.” On May21, 2026, the last reported sale price of our Common Stock onNasdaq was $4.03per share. As of May21, 2026, the aggregate market value of our outstanding Common Stock held by non-affiliates wasapproximately $33.4million, which was calculated based on 8,278,806shares of outstanding common stock held by non-affiliates multiplied by a priceper share of $4.03, the closing price of our Common Stock on that date. Pursuant to General Instruction I.B.6 of Form S-3, in no event will we sell theshelf securities in a public primary offering with a value exceeding more than one-third of the aggregate market value of our Common Stock held by Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities orpassed upon the accuracy or adequacy of this prospectus supplement. Any representation to the contrary is a criminal offense. Roth Capital Partners The date of this prospectus supplement is May22, 2026.