Material Event (Form 8-K)

Item 8.01. Other Events.

On January 21, 2026, T1 Energy Inc. (the "Company") filed with the Securities and Exchange Commission (the "SEC") an automatic shelf registration statement on Form S-3ASR (File No. 333-292857) (the "Registration Statement"). On August 7, 2026, the Company filed a prospectus supplement pursuant to the Registration Statement covering the resale of shares of its common stock, par value $0.01 per share (the "common stock"), by Evervolt Green Energy Holding Pte, Ltd., a private company limited by shares organized under the laws of Singapore ("Evervolt"). The shares of common stock registered for resale pursuant to the prospectus supplement consist of 13,615,979 shares of common stock that were issued to Evervolt as a portion of the consideration for the purchase by the Company of certain intellectual property and proprietary rights from Evervolt pursuant to an intellectual property purchase agreement, dated July 28, 2026, between the Company and Evervolt.

The filing of the prospectus supplement is not itself a sale of securities by Evervolt and does not necessarily mean that Evervolt will choose to sell any shares of common stock. If any shares of common stock are sold by Evervolt, the Company would not receive any proceeds from that sale. No securities will be issued or sold by the Company pursuant to the prospectus supplement.

The Company is filing this current report to provide the legal opinion as to the validity of the shares of common stock covered by the prospectus supplement, which opinion is attached hereto as Exhibit 5.1 and is incorporated herein by reference.