[Form 4] T1 Energy Inc. Insider Trading Activity

Rhea-AI Filing Summary

T1 Energy Inc. director and Chief Executive Officer Daniel Barcelo reported compensation-related equity activity involving Restricted Stock Units and associated tax withholding. On January 1, 2026, 333,333 RSUs vested and were exercised into 333,333 shares of Common Stock at $0.00 per share.

To cover tax obligations from RSU settlements, the company withheld 110,155 shares of Common Stock at $6.68 per share on March 13, 2026 and 134,903 shares at $2.58 per share on March 30, 2026. Following these transactions, Barcelo beneficially owned 1,096,608 shares of Common Stock.

The RSU grant originally covered 1,000,000 RSUs vesting in three equal annual installments. After vesting and settlement of the second 333,333-unit installment, 333,334 RSUs remain outstanding, scheduled as the third and final installment of the January 1, 2025 grant.

Insider Trade Summary

333,333 shares exercised/converted

Mixed 4 txns

Insider Barcelo Daniel

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	134,903	$2.58	$348K
Tax Withholding	Common Stock	110,155	$6.68	$736K
Exercise	Restricted Stock Units (RSUs)	333,333	$0.00	--
Exercise	Common Stock	333,333	$0.00	--

Holdings After Transaction: Common Stock — 1,096,608 shares (Direct); Restricted Stock Units (RSUs) — 333,334 shares (Direct)

Footnotes (1)

1. This transaction represents the vesting on January 1, 2026 of 333,333 Restricted Stock Units ("RSUs") granted on January 1, 2025 under the Company's 2021 Equity Incentive Plan (as amended and restated on April 22, 2024) and reported on the Form 4 filed January 3, 2025. This relates to the vesting of the second of three equal annual installments (further details in Note 5 below). Each RSU represents the right to receive one share of Common Stock. These 333,333 RSUs were settled in shares of Common Stock on March 13, 2026. This transaction represents 110,155 shares of Common Stock withheld for tax obligations in connection with the settlement on March 13, 2026 of 333,333 RSUs that vested on January 1, 2026 (the second of three equal annual installments). The vesting of those 333,333 RSUs is described in Note 1 above. This transaction represents 134,903 shares of Common Stock withheld for tax obligations in connection with the settlement on March 30, 2026 of 333,333 RSUs that vested on January 1, 2025 (the first of three equal annual installments). Those 333,333 RSUs had previously vested as reported on the Form 4 filed on January 3, 2025, however, settlement did not occur until March 30, 2026. Because the vesting of those 333,333 RSUs was previously reported, only the tax withholding is reported on this Form 4. The 1,096,608 shares of Common Stock beneficially owned following the reported transactions reflects: (i) 1,008,333 shares reported on the Form 4 filed December 3, 2025; plus (ii) 333,333 shares acquired upon vesting of RSUs on January 1, 2026 and subsequently settled on March 13, 2026 (Note 1 above); less (iii) 110,155 shares withheld for tax upon settlement of RSUs on March 13, 2026 (Note 2 above); less (iv) 134,903 shares withheld for tax upon settlement of RSUs on March 30, 2026 (Note 3 above). The RSUs reported on the Form 4 filed January 3, 2025 were granted for a total of 1,000,000 RSUs vesting in three equal annual installments: one-third vested on January 1, 2025; one-third vested on January 1, 2026; and the remaining one-third will vest on January 1, 2027. That filing reported 333,333 shares acquired in Table I and 666,667 RSUs in Table II, representing the unvested second and third installments. Following the vesting and settlement of the second installment reported herein, 333,334 RSUs remain outstanding and are reported in Table II, representing the third and final installment of the grant dated January 1, 2025. No Table II disposition was reported for the first installment because those RSUs were converted to shares upon vesting on January 1, 2025 and reported in Table I on the prior filing, not in Table II.

Key Figures

RSUs vested: 333,333 RSUs Tax withholding shares March 13, 2026: 110,155 shares at $6.68/share Tax withholding shares March 30, 2026: 134,903 shares at $2.58/share +4 more

7 metrics

RSUs vested 333,333 RSUs Vested on January 1, 2026 from January 1, 2025 grant

Tax withholding shares March 13, 2026 110,155 shares at $6.68/share Common Stock withheld for tax on RSU settlement

Tax withholding shares March 30, 2026 134,903 shares at $2.58/share Common Stock withheld for tax on RSU settlement

Total shares withheld for tax 245,058 shares Sum of March 13 and March 30, 2026 tax-withholding dispositions

Shares beneficially owned after transactions 1,096,608 shares Common Stock held by Daniel Barcelo following reported transactions

Remaining RSUs 333,334 RSUs Third and final installment of January 1, 2025 grant

Original RSU grant size 1,000,000 RSUs Granted January 1, 2025 in three equal annual installments

Key Terms

Restricted Stock Units ("RSUs"), tax obligations, Equity Incentive Plan, beneficially owned, +1 more

5 terms

Restricted Stock Units ("RSUs") financial

"This transaction represents the vesting on January 1, 2026 of 333,333 Restricted Stock Units ("RSUs") granted on January 1, 2025"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

tax obligations financial

"This transaction represents 110,155 shares of Common Stock withheld for tax obligations in connection with the settlement on March 13, 2026"

Equity Incentive Plan financial

"under the Company's 2021 Equity Incentive Plan (as amended and restated on April 22, 2024)"

An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.

beneficially owned financial

"The 1,096,608 shares of Common Stock beneficially owned following the reported transactions reflects:"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

annual installments financial

"were granted for a total of 1,000,000 RSUs vesting in three equal annual installments"

Form 4 Insider Transactions: What Each Field Means →

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^*

Barcelo Daniel

(Last) (First) (Middle)

1211 E 4TH ST.

(Street)

AUSTIN TEXAS 78702

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
01/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	01/01/2026		M		333,333(1)	A	(1)	1,341,666(1)	D
Common Stock	03/13/2026		F		110,155(2)	D	$6.68	1,231,511(2)	D
Common Stock	03/30/2026		F		134,903(3)	D	$2.58	1,096,608(3)(4)	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units (RSUs)	(1)	01/01/2026		M			333,333	(5)	(5)	Shares of Common Stock	333,333	(1)	333,334(5)	D

Explanation of Responses:

1. This transaction represents the vesting on January 1, 2026 of 333,333 Restricted Stock Units ("RSUs") granted on January 1, 2025 under the Company's 2021 Equity Incentive Plan (as amended and restated on April 22, 2024) and reported on the Form 4 filed January 3, 2025. This relates to the vesting of the second of three equal annual installments (further details in Note 5 below). Each RSU represents the right to receive one share of Common Stock. These 333,333 RSUs were settled in shares of Common Stock on March 13, 2026.

2. This transaction represents 110,155 shares of Common Stock withheld for tax obligations in connection with the settlement on March 13, 2026 of 333,333 RSUs that vested on January 1, 2026 (the second of three equal annual installments). The vesting of those 333,333 RSUs is described in Note 1 above.

3. This transaction represents 134,903 shares of Common Stock withheld for tax obligations in connection with the settlement on March 30, 2026 of 333,333 RSUs that vested on January 1, 2025 (the first of three equal annual installments). Those 333,333 RSUs had previously vested as reported on the Form 4 filed on January 3, 2025, however, settlement did not occur until March 30, 2026. Because the vesting of those 333,333 RSUs was previously reported, only the tax withholding is reported on this Form 4.

4. The 1,096,608 shares of Common Stock beneficially owned following the reported transactions reflects: (i) 1,008,333 shares reported on the Form 4 filed December 3, 2025; plus (ii) 333,333 shares acquired upon vesting of RSUs on January 1, 2026 and subsequently settled on March 13, 2026 (Note 1 above); less (iii) 110,155 shares withheld for tax upon settlement of RSUs on March 13, 2026 (Note 2 above); less (iv) 134,903 shares withheld for tax upon settlement of RSUs on March 30, 2026 (Note 3 above).

5. The RSUs reported on the Form 4 filed January 3, 2025 were granted for a total of 1,000,000 RSUs vesting in three equal annual installments: one-third vested on January 1, 2025; one-third vested on January 1, 2026; and the remaining one-third will vest on January 1, 2027. That filing reported 333,333 shares acquired in Table I and 666,667 RSUs in Table II, representing the unvested second and third installments. Following the vesting and settlement of the second installment reported herein, 333,334 RSUs remain outstanding and are reported in Table II, representing the third and final installment of the grant dated January 1, 2025. No Table II disposition was reported for the first installment because those RSUs were converted to shares upon vesting on January 1, 2025 and reported in Table I on the prior filing, not in Table II.

Remarks:

	/s/ Michael Holland, as Attorney-in-Fact	04/02/2026
	** 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: SEC 1474 (03-26)