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"). Following the filing of the Registration Statement, the Company also filed a prospectus supplement pursuant to the Registration Statement covering the resale of 14,274,704 shares of its common stock, par value $0.01 per share (the "common stock"), and a warrant to purchase 7,000,000 shares of common stock at a purchase price of $0.01 per share (the "Warrant") by the selling securityholders named in the prospectus supplement. The shares of common stock registered for resale pursuant to the prospectus supplement consist of (i) 3,000,000 shares of common stock that were issued to Trina Solar (Schweiz) AG ("Trina") in a private placement on December 30, 2025, (ii) 4,274,704 shares of common stock that were issued to Trina in a private placement on January 21, 2026 and (iii) 7,000,000 shares of common stock which may be issued upon the exercise of the Warrant issued to Stellar Hann Investment Ltd. (together with Trina, the "selling securityholders") in a private placement on September 10, 2025.

The filing of the prospectus supplement is not itself a sale of securities by the selling securityholders and does not necessarily mean that the selling securityholders will choose to sell any shares of common stock or the Warrant. If any shares of common stock or the Warrant are sold by the selling securityholders, 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 and the enforceability of the Warrant covered by the prospectus supplement, which opinion is attached hereto as Exhibit 5.1 and is incorporated herein by reference.