Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Mahrer Thomas 2. Issuer Name and Ticker or Trading Symbol T1 Energy Inc. [TE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Accounting Officer (Last) (First) (Middle) 1211 E 4TH ST. 3. Date of Earliest Transaction (Month/Day/Year) 11/04/2026 (Street) AUSTIN, TX 78702 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 11/04/2026 M 25,000(1) A $2.73 25,000 D Common Stock 11/04/2026 F 6,088(2) D $2.73 18,912(3) D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stock Units (RSUs)

(1)

11/04/2026

M

25,000(4)

11/04/2026

(4)

Common Stock

25,000

(1)

50,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Mahrer Thomas 1211 E 4TH ST. AUSTIN, TX 78702			Chief Accounting Officer

Signatures

/s/ Harold Callo Sanchez, as Attorney-in-Fact		11/05/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	This transaction represents the vesting on November 4, 2026 of 25,000 Restricted Stock Units ("RSUs") granted on November 4, 2025 under the Company's 2021 Equity Incentive Plan (as amended and restated on April 22, 2024) and reported on the Form 3 filed February 13, 2026, as amended pursuant to Form 3/A filed on May 11, 2026. This relates to the vesting of the first of three equal annual installments (further details in Note 4 below). Each RSU represents the right to receive one share of Common Stock. These 25,000 RSUs were settled in shares of Common Stock on November 4, 2026.
(2)	This transaction represents 6,088 shares of Common Stock withheld for tax obligations in connection with the settlement on November 4, 2026 of 25,000 RSUs that vested on November 4, 2026 (the first of three equal annual installments). The vesting of those 25,000 RSUs is described in Note 1 above.
(3)	The 18,912 shares of Common Stock beneficially owned following the reported transactions reflects: (i) 25,000 shares acquired upon vesting of RSUs on November 4, 2026 (Note 1 above); less (v) 6,088 shares withheld for tax upon settlement of RSUs on November 4, 2026 (Note 2 above).
(4)	The RSUs reported on the Form 3 filed February 13, 2026, as amended pursuant to Form 3/A filed on May 11, 2026, were granted for a total of 75,000 RSUs vesting in three equal annual installments: one-third vested on November 4, 2026; one-third will vest on November 4, 2027; and the remaining one-third will vest on November 4, 2028. Following the vesting and settlement of the first installment reported herein, 50,000 RSUs remain outstanding.

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