First Solar CEO RSUs Vest, Shares Sold for Taxes

First Solar Chief Executive Officer Mark R. Widmar reported routine equity compensation activity.

Rhea-AI Filing Summary

First Solar Chief Executive Officer Mark R. Widmar reported routine equity compensation activity. On March 13, 2026, 4,856 restricted stock units granted on March 15, 2022 vested, converting into the same number of common shares under the company’s 2020 Omnibus Incentive Compensation Plan.

On March 16, 2026, 1,937 of these shares were sold by First Solar at $200.80 per share to cover tax withholding obligations related to the vesting, rather than a discretionary market sale by Widmar. Following these transactions, he directly holds 102,798 shares of First Solar common stock.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Widmar Mark R

Role Chief Executive Officer

Sold 1,937 shs ($389K)

Approx. gross sale proceeds $389K

Approx. exercise cost $0.00

Type	Security	Shares	Price	Value
Sale	Common Stock	1,937	$200.80	$389K
Exercise	Restricted Stock Units	4,856	$0.00	$0.00
Exercise	Common Stock	4,856	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 4,856 contracts (Direct); Common Stock — 102,798 shares (Direct)

Footnotes (4)

1. F1. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 15, 2022.
2. F2. Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units.
3. F3. Each restricted stock unit represents the right to receive, upon vesting, one share of the Issuer's common stock in accordance with the Issuer's 2020 Omnibus Incentive Compensation Plan.
4. F4. The restricted stock units were granted on March 15, 2022 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 15, 2022 are scheduled to vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

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Accepted by SEC EDGAR 03/17/2026 - 07:34 PM EDT Learn about SEC filing dates

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^*

Widmar Mark R

(Last) (First) (Middle)

C/O FIRST SOLAR, INC.

4300 E CAMELBACK ROAD, SUITE 220

(Street)

PHOENIX AZ 85018

(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)
03/13/2026

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	03/13/2026		M		4,856(1)	A	$0	104,735	D
Common Stock	03/16/2026		S		1,937(2)	D	$200.8	102,798	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	(3)	03/13/2026		M			4,856	(4)	(4)	Common Stock	4,856	$0	4,856	D

Explanation of Responses:

1. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 15, 2022.

2. Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units.

3. Each restricted stock unit represents the right to receive, upon vesting, one share of the Issuer's common stock in accordance with the Issuer's 2020 Omnibus Incentive Compensation Plan.

4. The restricted stock units were granted on March 15, 2022 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 15, 2022 are scheduled to vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

	/s/ Jason E. Dymbort, attorney-in-fact	03/17/2026
	** 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.