First Solar (NASDAQ: FSLR) CPO reports RSU vesting and tax-driven share sales

Rhea-AI Filing Summary

FIRST SOLAR, INC. Chief Product Officer Patrick James Buehler reported routine equity compensation activity and related tax-share sales. On March 6, 2026, a total of 1,675 restricted stock units vested and were converted into the same number of common shares from grants originally awarded on March 6 of 2021, 2023, 2024 and 2025. He also received a new grant of 1,903 restricted stock units as part of the company’s annual equity program for executive officers.

On March 9, 2026, a total of 697 common shares were sold at $190.36 per share. Footnotes state these shares were sold by the company to satisfy tax withholding obligations tied to the RSU vesting, rather than as discretionary open-market sales by Buehler. Following these transactions, he directly holds 6,841 common shares of First Solar.

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

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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^*

Buehler Patrick James

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026

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	03/06/2026		M		434(1)	A	$0	6,297	D
Common Stock	03/06/2026		M		189(2)	A	$0	6,486	D
Common Stock	03/06/2026		M		442(3)	A	$0	6,928	D
Common Stock	03/06/2026		M		610(4)	A	$0	7,538	D
Common Stock	03/09/2026		S		181(5)	D	$190.36	7,357	D
Common Stock	03/09/2026		S		79(5)	D	$190.36	7,278	D
Common Stock	03/09/2026		S		184(5)	D	$190.36	7,094	D
Common Stock	03/09/2026		S		253(5)	D	$190.36	6,841	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	(6)	03/06/2026		M			434	(7)	(7)	Common Stock	434	$0	0	D
Restricted Stock Units	(6)	03/06/2026		M			189	(8)	(8)	Common Stock	189	$0	376	D
Restricted Stock Units	(6)	03/06/2026		M			442	(9)	(9)	Common Stock	442	$0	884	D
Restricted Stock Units	(6)	03/06/2026		M			610	(10)	(10)	Common Stock	610	$0	1,831	D
Restricted Stock Units	(6)	03/06/2026		A		1,903		(11)	(11)	Common Stock	1,903	$0	1,903	D

Explanation of Responses:

1. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 6, 2021.

2. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 6, 2023.

3. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on March 6, 2024.

4. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on March 6, 2025.

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

6. 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.

7. The restricted stock units were granted on March 6, 2021 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2021 vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

8. The restricted stock units were granted on March 6, 2023 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2023 vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

9. The restricted stock units were granted on March 6, 2024 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2024 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

10. The restricted stock units were granted on March 6, 2025 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2025 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

11. The restricted stock units were granted on March 6, 2026 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2026 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

	/s/ Jason E. Dymbort, attorney-in-fact	03/10/2026
	** Signature of Reporting Person	Date
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FAQ

What did First Solar (FSLR) executive Patrick Buehler report in this Form 4?

Patrick James Buehler, Chief Product Officer of First Solar, reported RSU vesting, a new RSU grant, and related share sales. The activity reflects routine executive equity compensation rather than a standalone open-market investment decision by the insider.

How many First Solar shares did Patrick Buehler sell and at what price?

Buehler reported sales totaling 697 common shares of First Solar at $190.36 per share on March 9, 2026. Footnotes explain these shares were sold by the company to cover tax withholding obligations associated with recently vested restricted stock units.

What RSU awards vested for First Solar CPO Patrick Buehler?

A total of 1,675 restricted stock units vested on March 6, 2026, converting into an equal number of common shares. The vesting represents scheduled portions of RSU grants originally awarded on March 6 of 2021, 2023, 2024 and 2025 under First Solar’s 2020 Omnibus Incentive Plan.

Did Patrick Buehler receive a new RSU grant from First Solar in 2026?

Yes. On March 6, 2026, Buehler received a grant of 1,903 restricted stock units. Footnotes state this was part of First Solar’s annual equity grant to executive officers, with the units vesting in four equal annual installments beginning one year after the grant date.

Were the First Solar share sales by Patrick Buehler discretionary or for taxes?

Footnotes indicate the 697 common shares reported as sold at $190.36 were sold by First Solar to satisfy tax withholding obligations tied to RSU vesting. This characterizes the transactions as tax-related, not discretionary open-market selling by Buehler.

How many First Solar shares does Patrick Buehler hold after these transactions?

After the March 6 and March 9, 2026 transactions, Buehler directly holds 6,841 shares of First Solar common stock. This figure appears in the final non-derivative transaction line reporting his post-transaction ownership position in the company’s shares.

What vesting schedules apply to Patrick Buehler’s First Solar RSU grants?

Footnotes state the March 6, 2021 and March 6, 2023 RSU grants vest 20% annually on each anniversary. The March 6, 2024, 2025 and 2026 grants vest 25% annually starting one year after grant, reflecting the company’s annual executive equity program.