T1 Energy major holder reports 17.4% stake in new disclosure

Rhea-AI Filing Summary

T1 Energy Inc. disclosed that Trina Solar (Schweiz) AG has updated its ownership position in an amended Schedule 13D. The reporting person now beneficially owns 45,877,960 shares of T1 Energy common stock, representing 17.4% of the outstanding shares, based on 262,940,963 shares outstanding as of December 18, 2025.

The filing explains that Trina Solar (Schweiz) AG received 12,521,653 shares on September 5, 2025 through a “First Conversion” and a further 17,918,460 shares on December 10, 2025 through a “Second Conversion” under a Transaction Agreement with T1 Energy. Trina Solar (Schweiz) AG has sole voting and dispositive power over all 45,877,960 shares and reports no separate contracts or arrangements relating to these securities.

FAQ

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

What ownership stake in T1 Energy Inc. (TE) does Trina Solar (Schweiz) AG report?

The filing states that Trina Solar (Schweiz) AG beneficially owns 45,877,960 shares of T1 Energy Inc. common stock, representing 17.4% of the outstanding shares based on 262,940,963 shares outstanding as of December 18, 2025.

How did Trina Solar (Schweiz) AG acquire additional T1 Energy Inc. (TE) shares?

The document explains that Trina Solar (Schweiz) AG received 12,521,653 shares on September 5, 2025 in a “First Conversion” and 17,918,460 shares on December 10, 2025 in a “Second Conversion” under a Transaction Agreement with T1 Energy Inc.

Does Trina Solar (Schweiz) AG have sole voting power over its T1 Energy (TE) shares?

Yes. The filing reports sole voting power and sole dispositive power over 45,877,960 T1 Energy Inc. shares, with no shared voting or dispositive power.

What type of investor is Trina Solar (Schweiz) AG in relation to T1 Energy Inc. (TE)?

Trina Solar (Schweiz) AG is described as being engaged in the business of investment and is organized under the laws of Switzerland.

Are there any disclosed contracts or arrangements related to T1 Energy Inc. (TE) shares beyond the conversions?

Under the section on contracts, arrangements, understandings or relationships with respect to T1 Energy Inc. securities, the filing lists N/A, indicating no additional such agreements beyond the referenced Transaction Agreement conversions.

What is the significance of the December 10, 2025 date in the T1 Energy Inc. (TE) filing?

December 10, 2025 is the date of the event requiring the filing and the date on which the “Second Conversion” was completed, resulting in the issuance of 17,918,460 T1 Energy Inc. shares to Trina Solar (Schweiz) AG.

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Accepted by SEC EDGAR 12/22/2025 - 11:24 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 2)

T1 Energy Inc.

(Name of Issuer)

Common Stock, par value $0.01

(Title of Class of Securities)

35834F104

(CUSIP Number)

Catherine Pan-Giordano Esq.
51 W. 52nd Street,
New York, NY, 10019
(212) 415-9200

Anthony Epps Esq.
1400 Wewatta Street,
Denver, CO, 80202
(303) 352-1109

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

12/10/2025

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP No. 35834F104

1

Name of reporting person

Trina Solar (Schweiz) AG

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

SWITZERLAND

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 45,877,960.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 45,877,960.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

45,877,960.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

17.4 %

14

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person:

ITEM 13 Calculated based on 262,940,963 shares of common stock of the Issuer outstanding as of December 18, 2025.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock, par value $0.01
(b)	Name of Issuer: T1 Energy Inc.
(c)	Address of Issuer's Principal Executive Offices: 1211 E. 4th Street, Austin, TEXAS , 78702.
Item 2.	Identity and Background
(a)	Trina Solar (Schweiz) AG ("Reporting Person")
(b)	Birkenweg 4 Wallisellen, Switzerland 8304
(c)	The Reporting Person is engaged in the business of investment.
(d)	N/A - None
(e)	N/A - None
(f)	Switzerland
Item 3.	Source and Amount of Funds or Other Consideration
	OO
Item 4.	Purpose of Transaction
	Item 4 of the Schedule 13D filed by the Reporting Person on December 27, 2024 (the "Schedule 13D"), is incorporated by reference herein. On September 5, 2025, the Reporting Person and the Issuer completed the First Conversion (as defined in the Schedule 13D), and the Reporting Person received 12,521,653 shares of common stock of the Issuer on the same date. On December 10, 2025, the Reporting Person and the Issuer completed the Second Conversion (as defined in the Transaction Agreement which was incorporated by reference as an exhibit to the Schedule 13D), and the Reporting Person received 17,918,460 shares of common stock of the Issuer on the same date.
Item 5.	Interest in Securities of the Issuer
(a)	17.4%
(b)	45,877,960
(c)	Second Conversion (as defined in the Transaction Agreement which was incorporated by reference as an exhibit to the Schedule 13D) by the Reporting Person and issuance of 17,918,460 shares of common stock of the Issuer to the Reporting Person as a result of the Second Conversion.
(d)	N/A
(e)	N/A
Item 6.	Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer
	N/A
Item 7.	Material to be Filed as Exhibits.
	N/A

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Trina Solar (Schweiz) AG

Signature:	/a/ Vincenzo Costanzelli
Name/Title:	Chairman of Board of Directors
Date:	12/22/2025