T1 Energy CAO reports RSU-based share holdings

T1 Energy Inc. Chief Accounting Officer Thomas Mahrer reports holdings of restricted stock units (RSUs) that convert into shares of Common Stock.

Rhea-AI Filing Summary

T1 Energy Inc. Chief Accounting Officer Thomas Mahrer reports holdings of restricted stock units (RSUs) that convert into shares of Common Stock. One RSU award covers 12,670 underlying shares granted on November 4, 2025, vesting in three equal annual installments from November 4, 2026 through November 4, 2028. A second RSU award covers 75,000 underlying shares granted on January 29, 2026, vesting in three equal annual installments from January 29, 2027 through January 29, 2029. Each RSU represents a right to receive one share of Common Stock upon settlement and is net settled in shares.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Mahrer Thomas

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
holding	Restricted Stock Units (RSUs)	--	--	--
holding	Restricted Stock Units (RSUs)	--	--	--

Holdings After Transaction: Restricted Stock Units (RSUs) — 87,670 contracts (Direct)

Footnotes (3)

1. F1. Consists of restricted stock units ("RSUs") granted on November 4, 2025 under the T1 Energy 2021 Equity Incentive Plan (amended and restated as of April 22, 2024, the "Plan")). The RSUs vest in three equal annual installments, one-third (1/3) on November 4, 2026, one-third (1/3) on November 4, 2027 and one-third (1/3) on November 4, 2028. The RSUs are net settled in shares of Common Stock.
2. F2. Consists of RSUs granted on January 29, 2026 under the Plan. The RSUs vest in three equal annual installments, one-third (1/3) on January 29, 2027, one-third (1/3) on January 29, 2028 and one-third (1/3) on January 29, 2029. The RSUs are net settled in shares of Common Stock.
3. F3. Each RSU represents a right to receive one share of Common Stock upon settlement.

Key Figures

RSU grant underlying shares (Nov 2025): 12,670 shares RSU grant underlying shares (Jan 2026): 75,000 shares Vesting dates for Nov 2025 RSUs: Nov 4, 2026/2027/2028 +4 more

7 metrics

RSU grant underlying shares (Nov 2025) 12,670 shares Underlying Common Stock from RSUs granted November 4, 2025

RSU grant underlying shares (Jan 2026) 75,000 shares Underlying Common Stock from RSUs granted January 29, 2026

Vesting dates for Nov 2025 RSUs Nov 4, 2026/2027/2028 Three equal annual vesting installments

Vesting dates for Jan 2026 RSUs Jan 29, 2027/2028/2029 Three equal annual vesting installments

Exercise price of RSUs $0.0000 per share RSUs net settled in shares of Common Stock

Post-transaction RSUs block 1 12,670 units Total shares following transaction for first RSU line

Post-transaction RSUs block 2 75,000 units Total shares following transaction for second RSU line

Key Terms

Restricted Stock Units (RSUs), T1 Energy 2021 Equity Incentive Plan, net settled, underlying shares, +1 more

5 terms

Restricted Stock Units (RSUs) financial

"Consists of restricted stock units ("RSUs") granted on November 4, 2025 under the T1 Energy 2021 Equity Incentive Plan"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

T1 Energy 2021 Equity Incentive Plan financial

"granted on November 4, 2025 under the T1 Energy 2021 Equity Incentive Plan (amended and restated as of April 22, 2024)"

net settled financial

"The RSUs vest in three equal annual installments... The RSUs are net settled in shares of Common Stock."

underlying shares financial

"underlying_security_shares": "12670.0000""

exercise price financial

"conversion_or_exercise_price": "0.0000""

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider position does the T1 Energy Inc. (TE) Form 3/A cover?

The Form 3/A covers Chief Accounting Officer Thomas Mahrer. It details his holdings of restricted stock units (RSUs) that will convert into T1 Energy Inc. Common Stock according to specified multi-year vesting schedules under the company’s 2021 Equity Incentive Plan.

How many T1 Energy (TE) shares are tied to Thomas Mahrer’s November 2025 RSU grant?

The November 4, 2025 RSU grant covers 12,670 underlying shares of Common Stock. These RSUs vest in three equal annual installments on November 4, 2026, November 4, 2027 and November 4, 2028, and are net settled in shares when they vest.

What are the key terms of Thomas Mahrer’s January 2026 RSU grant at T1 Energy (TE)?

The January 29, 2026 RSU grant covers 75,000 underlying shares of Common Stock. The award vests in three equal annual installments on January 29, 2027, January 29, 2028 and January 29, 2029, with each RSU delivering one share upon settlement.

How do Thomas Mahrer’s RSUs at T1 Energy (TE) settle into shares?

Each RSU represents a right to receive one share of T1 Energy Common Stock upon settlement. The RSUs are net settled in shares, meaning that, upon vesting, the company delivers stock rather than requiring a cash exercise price from the insider.

Are the RSUs held by T1 Energy (TE) CAO Thomas Mahrer tied to a specific plan?

Yes. The RSUs are granted under the T1 Energy 2021 Equity Incentive Plan, amended and restated as of April 22, 2024. This plan governs grant terms, vesting schedules, and the net share settlement mechanics for these restricted stock unit awards.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/11/2026 - 05:39 PM Learn about SEC filing dates

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF 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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Mahrer Thomas

(Last) (First) (Middle)

1211 E 4TH ST.

(Street)

AUSTIN TEXAS 78702

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
02/05/2026

3. Issuer Name and Ticker or Trading Symbol
T1 Energy Inc. [ TE ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)
02/13/2026

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Accounting Officer

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units (RSUs)	(1)	(1)	Common Stock	75,000	$0(3)	D
Restricted Stock Units (RSUs)	(2)	(2)	Common Stock	12,670	$0(3)	D

Explanation of Responses:

1. Consists of restricted stock units ("RSUs") granted on November 4, 2025 under the T1 Energy 2021 Equity Incentive Plan (amended and restated as of April 22, 2024, the "Plan")). The RSUs vest in three equal annual installments, one-third (1/3) on November 4, 2026, one-third (1/3) on November 4, 2027 and one-third (1/3) on November 4, 2028. The RSUs are net settled in shares of Common Stock.

2. Consists of RSUs granted on January 29, 2026 under the Plan. The RSUs vest in three equal annual installments, one-third (1/3) on January 29, 2027, one-third (1/3) on January 29, 2028 and one-third (1/3) on January 29, 2029. The RSUs are net settled in shares of Common Stock.

3. Each RSU represents a right to receive one share of Common Stock upon settlement.

Remarks:

Relationship of Reporting Person to Issuer - Chief Accounting Officer and Corporate Controller. This Amendment No. 1 to the Form 3 originally filed on February 13, 2026 is being filed to report an additional grant of 12,670 restricted stock units beneficially owned by the Reporting Person as of February 5, 2026, that was inadvertently omitted from the original Form 3. Exhibit List: Exhibit 24.1 - Power of Attorney.

	/s/ Harold Callo Sanchez, as Attorney-in-Fact	05/11/2026
	** 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 5 (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 3: SEC 1473 (03-26)