Exercise4

T1 Energy Inc.

Total Value

$84.9K

Filing Date

Nov 6, 2026

1 transactions

Trade Summary

On Nov 4, 2026, Mahrer Thomas, Chief Accounting Officer, reported $84.9K of T1 Energy Inc. (TE) across 1 transactions. The filing covers Common Stock and reflects balanced net activity of $0. Reported prices ranged from $2.73. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.

Insider Information

Name: Mahrer Thomas
Role: Chief Accounting Officer
Location: AUSTIN, TX

Filing Details

Filing Date: Nov 6, 2026
Transaction Date: Nov 4, 2026
Accession Number: 0001628280-26-071822
Form Type: 4

Non-Derivative Transactions

Date	Security	Shares	Price	Type	Value
Nov 4, 2026	Common Stock	25,000	$2.73	Exercise	$68.3K
Nov 4, 2026	Common Stock	6,088	$2.73	Tax Withholding	$16.6K

Derivative Transactions

Date	Security	Shares	Exercise Price	Type	Value
Nov 4, 2026	TE derivative	25,000	—	Exercise	—

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Footnotes

(F1)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.
(F2)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.
(F3)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).
(F4)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.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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 for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mahrer Thomas

(Last)

(First)

(Middle)

1211 E 4TH ST.

(Street)

AUSTIN

78702

(City)

(State)

(Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
11/04/2026

4. If Amendment, Date of 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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
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

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 Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units (RSUs)	⁽¹⁾	11/04/2026		M			25,000⁽⁴⁾	11/04/2026	⁽⁴⁾	Common Stock	25,000	⁽¹⁾	50,000	D

Explanation of Responses:

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.

Remarks:

	/s/ Harold Callo Sanchez, as Attorney-in-Fact	11/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Form 4 as rendered by the SEC from accession 0001628280-26-071822.

T1 Energy Inc.

Trade Summary

Company Information

Insider Information

Filing Details

Non-Derivative Transactions

Derivative Transactions

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Footnotes

SEC Form 4

SEC Filing

SEC Form 4