T1 Energy Inc. has filed a prospectus supplement with the Securities and Exchange Commission to allow Evervolt Green Energy Holding Pte, Ltd., a Singapore-based private company, to resell shares of its common stock. The filing was made on October 6, 2026, pursuant to an automatic shelf registration statement on Form S-3ASR (File No. 333-292857) that T1 Energy filed with the SEC on January 21, 2026.

The shares available for resale consist of 7,246,377 shares of T1 Energy common stock, which have been issued or are issuable subject to certain beneficial ownership limitations to Evervolt. These shares were issued as part of the consideration for the purchase of intellectual property and proprietary rights and related rights, as well as certain other assets, from Evervolt. This transaction was conducted under an intellectual property purchase agreement dated July 28, 2026.

The filing of the prospectus supplement does not constitute a sale of securities by Evervolt, and the Company will not receive any proceeds from any potential future sales. T1 Energy filed this report to include a legal opinion regarding the validity of the shares covered by the prospectus supplement, which is attached as Exhibit 5.1.