Globalfoundries Inc. 美股招股说明书（2026年3月11日版）

The information in this preliminary prospectus supplement is not complete and may be changed. A registration statementrelating to these securities has been declared effective by the Securities and Exchange Commission. This preliminary SUBJECT TO COMPLETION, DATED March 11, 2026 Prospectus Supplement(To Prospectus Dated March 11, 2026) Ordinary SharesGLOBALFOUNDRIES Inc. This is a public offering of the ordinary shares, US$0.02 par value per share, of GLOBALFOUNDRIES Inc., or the company. Our selling shareholder, MubadalaTechnology Investment Company (“MTIC”), a wholly owned subsidiary of Mubadala Investment Company PJSC (“MIC,” together with MTIC, “Mubadala”), isoffering an aggregate of ordinary shares, 20,000,000 shares of which shall be sold to the public at a price to the public of $ and approximately $300.0 million worth ofshares of which shall be repurchased by us at the price paid by the underwriters in this offering, as described below, under this prospectus supplement (the “ProspectusSupplement”) to the accompanying prospectus pursuant to a registration statement on Form F-3 that the company filed with the U.S. Securities and ExchangeCommission (“SEC”) on March 11, 2026. On March 10, 2026, the last reported sale price for our ordinary shares on the Nasdaq Global Select Market (“Nasdaq”) was$46.63 per ordinary share. We are not selling any ordinary shares under this prospectus supplement and will not receive any proceeds from the sale of the ordinaryshares by MTIC. We intend to concurrently repurchase from the underwriters approximately $300.0 million of the ordinary shares that are subject to this offering, Public offering price __________________ (1)The public offering price for the 20,000,000 ordinary shares sold to the public was $(2)The underwriting discount for the 20,000,000 shares offered to the public was $ per share. The price for the approximately $300.0 million worth of ordinaryshares we intend to repurchase from the underwriters was $per share. No underwriting discount or commissions will be paid to the underwriters with respectto theshares we intend to repurchase.(3)Proceeds in the table only includes proceeds from the offering to the public of 20,000,000 ordinary shares. In addition to the proceeds for the 20,000,000 ordinaryshares sold to the public, Mubadala is also receiving approximately $300.0 million from the sale of the ordinary shares we intend to repurchase from theunderwriters in the offering. (4)We refer you to “Underwriters” beginning on pageS-19of this prospectus supplement for additional information regarding underwriting compensation. MTIC has granted an option to the underwriters, exercisable for 30 days after the date of this prospectus supplement, to purchase up to 3,000,000 additionalordinary shares (equal to 15% of the initial ordinary shares being sold to the public). The underwriters will pay the public offering price, less underwriting discountsand commissions, for any shares sold pursuant to such option. The share repurchase shall not be contingent on any exercise of such option by the underwriters, and any Neither the U.S. Securities and Exchange Commission (the “SEC”) nor any state securities commission has approved or disapproved of these securities or passedupon the adequacy or accuracy of this prospectus supplement. Any representation to the contrary is a criminal offense. The underwriters expect to deliver the ordinary shares against payment in New York, New York on or aboutDepository Trust Company. , 2026, through the book-entry facility of The J.P. Morgan Morgan Stanley PROSPECTUS SUPPLEMENT ABOUT THIS PROSPECTUS SUPPLEMENTPRESENTATION OF FINANCIAL AND OTHER INFORMATIONSPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTSSUMMARY ABOUT THIS PROSPECTUSPRESENTATION OF FINANCIAL AND OTHER INFORMATIONCAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION ABOUT THIS PROSPECTUS SUPPLEMENT In this prospectus supplement, unless the context otherwise requires, the terms “GF,” “the company,” “we,” “us” and “our” referto GLOBALFOUNDRIES Inc. and its consolidated subsidiaries. You should rely only on the information contained or incorporated by reference in this prospectus supplement and theaccompanying prospectus or contained in any free writing prospectus prepared by or on behalf of us or to which we have referred you.None of the company, Mubadala or the underwriters have authorized anyone to provide any information or make any representationsother than those contained in this prospectus supplement and the accompanying prospectus or in any free writing prospectus preparedby or on behalf of us or to which we have referred you. We and Mubadala take no responsibility for, and can provide no assurance asto the reliability of, any other information that others may give you. MTIC is offering to sell, and seeking offers to buy, ordinary shares This prospectus supplement and the accompanying prospectus form part of a registration statement on Form F-3