[Form 4] First Solar, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Mark R. Widmar, Chief Executive Officer and Director of First Solar, Inc. (FSLR), reported multiple open-market sales of company common stock on August 12-13, 2025 under a previously adopted Rule 10b5-1 trading plan. The transactions total 27,708 shares sold across 11 reported lines at weighted-average prices ranging roughly from $181.77 to $190.25 per share. After these dispositions the reporting person beneficially owned 84,182 shares as of the last reported sale. The filing states the 10b5-1 plan was adopted on May 13, 2025 and that transaction details reflect multiple executions within disclosed price ranges.

Positive

• Transactions executed under a Rule 10b5-1 plan, providing an affirmative defense and indicating pre-planned sales
• Complete Section 16 disclosure including weighted-average prices and willingness to provide tranche-level details on request

Negative

• Total insider sales of 27,708 shares across August 12-13, 2025, reducing reported beneficial ownership to 84,182 shares
• Sales executed at prices up to $190.25, constituting a notable reduction in the CEO's reported stake over the two-day period

Insights

Corporate Governance Expert

TL;DR: Routine insider sales executed under a 10b5-1 plan reduce the CEO's stake but comply with an established trading mechanism.

The Form 4 shows the CEO and director executing a series of sales totaling 27,708 shares under a Rule 10b5-1 plan adopted May 13, 2025. Use of a pre-established written plan typically provides an affirmative defense to accusations of trading on material nonpublic information, and the filing discloses weighted-average prices and ranges for each trade line. From a governance perspective, the disclosure is complete for Section 16 purposes and includes the plan note and willingness to provide tranche-level price details on request.

Securities Analyst

TL;DR: Insider sales are material to ownership levels but appear scheduled; impact on valuation is likely neutral absent other company news.

The reported sales reduced beneficial ownership to 84,182 shares after transactions executed at prices between about $181.77 and $190.25. Total shares sold (27,708) represent the material fact here; however, the filing attributes the trades to a 10b5-1 plan, indicating pre-arranged disposition rather than opportunistic ad hoc selling. For investors, the filing provides clear numbers but contains no operational or forward-looking company information to change an investment thesis on its own.

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).

X

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^*

Widmar Mark R

(Last) (First) (Middle)

C/O FIRST SOLAR, INC.

350 WEST WASHINGTON STREET, SUITE 600

(Street)

TEMPE AZ 85288

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
FIRST SOLAR, INC. [ FSLR ]

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

3. Date of Earliest Transaction (Month/Day/Year)
08/12/2025

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

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 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	08/12/2025(1)		S		200	D	$181.78(2)	111,690	D
Common Stock	08/12/2025(1)		S		900	D	$183.79(3)	110,790	D
Common Stock	08/12/2025(1)		S		14,322	D	$185.04(4)	96,468	D
Common Stock	08/12/2025(1)		S		5,456	D	$186.17(5)	91,012	D
Common Stock	08/12/2025(1)		S		2,834	D	$186.97(6)	88,178	D
Common Stock	08/12/2025(1)		S		200	D	$187.74(7)	87,978	D
Common Stock	08/13/2025(1)		S		1,367	D	$185.45(8)	86,611	D
Common Stock	08/13/2025(1)		S		581	D	$186.58(9)	86,030	D
Common Stock	08/13/2025(1)		S		786	D	$187.38(10)	85,244	D
Common Stock	08/13/2025(1)		S		274	D	$188.82(11)	84,970	D
Common Stock	08/13/2025(1)		S		788	D	$189.91(12)	84,182	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. This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on May 13, 2025.

2. This transaction was executed in multiple trades at prices ranging from $181.77 to $181.78. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

3. This transaction was executed in multiple trades at prices ranging from $183.26 to $184.22. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

4. This transaction was executed in multiple trades at prices ranging from $184.52 to $185.46. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

5. This transaction was executed in multiple trades at prices ranging from $185.61 to $186.60. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

6. This transaction was executed in multiple trades at prices ranging from $186.61 to $187.49. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

7. This transaction was executed in multiple trades at prices ranging from $187.73 to $187.74. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

8. This transaction was executed in multiple trades at prices ranging from $185.00 to $185.96. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

9. This transaction was executed in multiple trades at prices ranging from $186.07 to $186.98. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

10. This transaction was executed in multiple trades at prices ranging from $187.11 to $187.84. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

11. This transaction was executed in multiple trades at prices ranging from $188.51 to $189.20. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

12. This transaction was executed in multiple trades at prices ranging from $189.67 to $190.25. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote.

	/s/ Jason E. Dymbort, attorney-in-fact	08/14/2025
	** 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.

FAQ

Who filed this Form 4 for FSLR?

The filing was made by Mark R. Widmar, who is reported as both Chief Executive Officer and a Director of First Solar, Inc.

How many FSLR shares did the reporting person sell?

The Form 4 reports 27,708 shares sold in multiple transactions on August 12-13, 2025.

At what prices were the FSLR shares sold?

Reported weighted-average prices for the sale lines range approximately from $181.77 to $190.25 per share, with detailed price ranges disclosed for each trade line.

Were the trades part of a trading plan?

Yes. The filing states the transactions were effected pursuant to a Rule 10b5-1 trading plan adopted May 13, 2025.

What was the reporting person's beneficial ownership after the transactions?

Following the reported sales, the reporting person beneficially owned 84,182 shares as shown in the Form 4.