Trina Solar (TE) affiliate sells 22.5M T1 Energy shares in open market

Rhea-AI Filing Summary

TRINA SOLAR (SCHWEIZ) AG, a ten percent owner of T1 Energy Inc., reported open-market sales of 22,500,000 Common Shares of T1 Energy. The sales took place on May 21 and 22 at weighted average prices generally between about $8 and $9 per share, across multiple individual trades within disclosed price ranges. After these transactions, the reporting holder directly owned 30,652,664 Common Shares of T1 Energy. The filing notes that detailed trade-by-trade pricing information is available to the company, its security holders, or regulators upon request.

Insights

Equity ownership and insider-trading analyst

Large shareholder executes sizable open-market sale but keeps a substantial position.

TRINA SOLAR (SCHWEIZ) AG, identified as a ten percent owner of T1 Energy Inc., executed a series of open-market sales totaling 22,500,000 Common Shares. These trades were reported with code S, confirming they were dispositions rather than option exercises or tax events.

The weighted average sale prices ranged from approximately $7.74 to $9.43 per share across different transaction blocks, indicating active selling over a relatively narrow price band. Despite the sizable sale, the holder still owns 30,652,664 Common Shares directly after the latest transaction, which remains a significant stake.

No derivative positions are shown in this filing, and there is no reference to a Rule 10b5-1 trading plan in the provided footnotes. The economic impact of these sales depends on T1 Energy’s total share count and market liquidity, which are not detailed here, so the filing mainly signals a notable but not fully quantifiable reduction by a large holder.

Insider Trade Summary

Net Seller: 22,500,000 shares ($190,311,514)

Net Sell 5 txns

Insider TRINA SOLAR (SCHWEIZ) AG

Role null

Sold 22,500,000 shs ($190.31M)

Type	Security	Shares	Price	Value
Sale	Common Shares	9,479,904	$8.1347	$77.12M
Sale	Common Shares	20,096	$8.80	$177K
Sale	Common Shares	8,849,024	$8.6229	$76.30M
Sale	Common Shares	1,150,976	$9.2011	$10.59M
Sale	Common Shares	3,000,000	$8.708	$26.12M

Holdings After Transaction: Common Shares — 30,672,760 shares (Direct, null)

Footnotes (1)

1. The sale price reported above is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.07 to $9.06, inclusive. The reporting person undertakes to provide to T1 Energy Inc., any security holder of T1 Energy Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The sale price reported above is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.07 to $9.43, inclusive. The reporting person undertakes to provide to T1 Energy Inc., any security holder of T1 Energy Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The sale price reported above is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.61 to $8.96, inclusive. The reporting person undertakes to provide to T1 Energy Inc., any security holder of T1 Energy Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The sale price reported above is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.74 to $8.72, inclusive. The reporting person undertakes to provide to T1 Energy Inc., any security holder of T1 Energy Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

Key Figures

Total shares sold: 22,500,000 shares Post-transaction holdings: 30,652,664 shares Largest block sale: 9,479,904 shares at $8.1347 +3 more

6 metrics

Total shares sold 22,500,000 shares Net open-market sales reported in this Form 4

Post-transaction holdings 30,652,664 shares Common Shares directly owned after latest sale

Largest block sale 9,479,904 shares at $8.1347 Non-derivative Common Shares sold on May 22

Additional block sale 8,849,024 shares at $8.6229 Non-derivative Common Shares sold on May 21

Higher-priced block 1,150,976 shares at $9.2011 Common Share sale on May 21

Price range footnote $7.74–$8.72 per share One weighted-average sale range disclosed in footnotes

Key Terms

ten percent owner, open-market sale, non-derivative, weighted average price, +1 more

5 terms

ten percent owner financial

"TRINA SOLAR (SCHWEIZ) AG is marked as a ten percent owner of T1 Energy Inc."

open-market sale financial

"Each transaction is described with the transaction_action field as an open-market sale."

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

non-derivative financial

"Each transaction lists transaction_type as non-derivative for Common Shares."

weighted average price financial

"The sale price reported above is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Common Shares financial

"The security_title field identifies the security as Common Shares."

Common shares are the basic units of ownership in a company that give holders a claim on profits and a right to vote on key matters, like electing the board. Think of them as membership cards in a club: they let you share in successes and losses, but in a bankruptcy or liquidation they are paid after creditors and preferred shareholders, so their value can swing more and matters for assessing risk and potential return.

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^*

TRINA SOLAR (SCHWEIZ) AG

(Last) (First) (Middle)

BIRKENWEG 4

(Street)

WALLISELLEN 8304

(City) (State) (Zip)

SWITZERLAND

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

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 Shares	05/21/2026		S		8,849,024	D	$8.6229(1)	44,303,640	D
Common Shares	05/21/2026		S		1,150,976	D	$9.2011(2)	43,152,664	D
Common Shares	05/21/2026		S		3,000,000	D	$8.708(3)	40,152,664	D
Common Shares	05/22/2026		S		9,479,904	D	$8.1347(4)	30,672,760	D
Common Shares	05/22/2026		S		20,096	D	$8.8	30,652,664	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

Explanation of Responses:

1. The sale price reported above is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.07 to $9.06, inclusive. The reporting person undertakes to provide to T1 Energy Inc., any security holder of T1 Energy Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

2. The sale price reported above is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.07 to $9.43, inclusive. The reporting person undertakes to provide to T1 Energy Inc., any security holder of T1 Energy Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

3. The sale price reported above is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.61 to $8.96, inclusive. The reporting person undertakes to provide to T1 Energy Inc., any security holder of T1 Energy Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

4. The sale price reported above is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.74 to $8.72, inclusive. The reporting person undertakes to provide to T1 Energy Inc., any security holder of T1 Energy Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

	Trina Solar (Schweiz) AG By: Vincenzo Costanzelli, Chairman of the Board of Directors	05/26/2026
	** 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)

FAQ

What did TRINA SOLAR (SCHWEIZ) AG do in this T1 Energy (TE) Form 4?

TRINA SOLAR (SCHWEIZ) AG sold 22,500,000 T1 Energy Common Shares. The Form 4 shows multiple open-market sale transactions on May 21–22 at prices around $8–$9 per share, reducing but not eliminating its sizable ownership position in T1 Energy.

How many T1 Energy (TE) shares does TRINA SOLAR (SCHWEIZ) AG still hold?

After the reported sales, the holder owns 30,652,664 Common Shares. This post-transaction balance reflects its remaining direct position in T1 Energy Inc., as disclosed in the latest transaction line of the Form 4 filing.

At what prices were the T1 Energy (TE) shares sold by TRINA SOLAR (SCHWEIZ) AG?

The reported sales used weighted average prices between roughly $7.74 and $9.43. Individual transaction blocks show averages like $8.13, $8.62, $8.71, $8.80, and $9.20 per share, with footnotes stating trades occurred within specified price ranges.

How many T1 Energy (TE) shares did TRINA SOLAR (SCHWEIZ) AG sell in total?

The Form 4 summarizes total net sales of 22,500,000 Common Shares. This figure combines five separate non-derivative open-market sale entries reported for May 21 and May 22, and represents a significant reduction in the holder’s share count.

Were TRINA SOLAR (SCHWEIZ) AG’s T1 Energy (TE) trades part of derivative exercises?

No, all reported transactions involve non-derivative Common Shares coded as sales. The derivative summary is empty in this filing, and there are no option exercises or conversions; each entry is an open-market sale of existing Common Shares.

Do the footnotes say anything special about TRINA SOLAR (SCHWEIZ) AG’s T1 Energy (TE) sales?

The footnotes explain that each reported price is a weighted average. They state that shares were sold in multiple trades within specified price ranges and that detailed per-trade information is available to T1 Energy, its security holders, or SEC staff upon request.