# EDGAR Filing Document

**Accession Number:** 0002047012
**File Stem:** 0000912282-26-000766
**Filing Date:** 2026-5
**Character Count:** 6414
**Document Hash:** c801f2bd2c9887eaa2d946dd118fc4a9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000912282-26-000766.hdr.sgml**: 20260526

**ACCESSION NUMBER**: 0000912282-26-000766

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260526

**DATE AS OF CHANGE**: 20260526

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** T1 Energy Inc.
- **CENTRAL INDEX KEY:** 0001992243
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 933205861
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-94349
- **FILM NUMBER:** 261021546

**BUSINESS ADDRESS:**
- **STREET 1:** 1211 E 4TH ST.
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78702
- **BUSINESS PHONE:** 409-599-5706

**MAIL ADDRESS:**
- **STREET 1:** 1211 E 4TH ST.
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78702

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FREYR Battery, Inc. /DE/
- **DATE OF NAME CHANGE:** 20230901
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TRINA SOLAR (SCHWEIZ) AG
- **CENTRAL INDEX KEY:** 0002047012

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** V8
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** BIRKENWEG 4
- **CITY:** WALLISELLEN
- **STATE:** V8
- **ZIP:** 8304
- **BUSINESS PHONE:** 41-43-299-6800

**MAIL ADDRESS:**
- **STREET 1:** BIRKENWEG 4
- **CITY:** WALLISELLEN
- **STATE:** V8
- **ZIP:** 8304

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 5)**

**T1 Energy Inc.**

*(Name of Issuer)*

**Common Stock, par value $0.01**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

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

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

**05/21/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Trina Solar (Schweiz) AG** | Name of reporting person<br>**Trina Solar (Schweiz) AG** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**V8** | Citizenship or place of organization<br>**V8** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**30652664.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**30652664.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**30652664.00** | Aggregate amount beneficially owned by each reporting person<br>**30652664.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**11.0%** | Percent of class represented by amount in Row (11)<br>**11.0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** Percent of class calculated based on 279,271,380 shares of common stock of the Issuer outstanding as of May 8, 2026, as reported by the Issuer on the 10-Q filed with the Securities and Exchange Commission on May 12, 2026.

**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, TX, 78702

**Item 4. Purpose of Transaction**

On May 21, 2026, and May 22, 2026, the Reporting Person sold a total of 22,500,000 shares of common stock of the Issuer in the ordinary course of business.

**Item 5. Interest in Securities of the Issuer**

**(a)**
11.0%

**(b)**
Sole voting power:             30,652,664
Shared voting power:                         0
Sole dispositive power:       30,652,664
Shared dispositive power:                   0

**(c)**
On May 21, 2026, the Reporting Person sold 13,000,000 common shares of the Issuer (the "Shares"), as set forth below:

8,849,024 Shares at an average weighted price of $8.6229 per share, with sales prices ranging from $8.07 to $9.06, inclusive

1,150,976 Shares at an average weighted price of $9.2011 per share, with sales prices ranging from $9.07 to $9.43, inclusive

3,000,000 Shares at an average weighted price of $8.708 per share, with sales prices ranging from $8.61 to $8.96, inclusive

On May 22, 2026, the Reporting Person sold 9,500,000 Shares, as set forth below:

9,479,904 Shares at an average weighted price of $8.1347 per share, with sales prices ranging from $7.74 to $8.72, inclusive

20,096 Shares at $8.80 per share

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Exhibit 10.1  Cooperation Agreement dated as of December 23, 2024
Exhibit 10.2  Amended and Restated Cooperation Agreement dated as of December 29, 2025

### 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.

**Reporting Person:** Trina Solar (Schweiz) AG

**Signature:** /a/ Vincenzo Costanzelli

**Name/Title:** Chairman of Board of Directors

**Date:** 05/26/2026