First Solar CTO reports RSU vesting, tax share sale

Rhea-AI Filing Summary

FIRST SOLAR, INC. Chief Technology Officer Markus Gloeckler reported routine equity compensation activity tied to previously granted restricted stock units. On March 13, 2026, 854 restricted stock units from a March 15, 2022 grant vested and were converted into 854 shares of common stock at a conversion price of $0.00 per share under the company’s 2020 Omnibus Incentive Compensation Plan.

In connection with this vesting, 368 common shares were sold by the company on March 16, 2026 at $200.80 per share to satisfy tax withholding obligations, a non-discretionary transaction. After these events, Gloeckler directly owned 10,348 shares of common stock and 853 restricted stock units.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Gloeckler Markus

Role Chief Technology Officer

Sold 368 shs ($74K)

Approx. gross sale proceeds $74K

Approx. exercise cost $0.00

Type	Security	Shares	Price	Value
Sale	Common Stock	368	$200.80	$74K
Exercise	Restricted Stock Units	854	$0.00	$0.00
Exercise	Common Stock	854	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 853 contracts for 854 underlying shares (Direct); Common Stock — 10,348 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.

FAQ

What insider transactions did FSLR CTO Markus Gloeckler report?

Markus Gloeckler reported vesting of 854 restricted stock units into common shares, and a related sale of 368 shares at $200.80 per share to cover tax withholding obligations. These transactions reflect routine executive equity compensation activity.

Was the FSLR CTO’s Form 4 transaction a discretionary stock sale?

The filing shows 368 shares sold at $200.80 per share, but footnotes state this sale was made by the company to satisfy tax withholding tied to RSU vesting. It is described as a non-discretionary tax-related transaction.

How many First Solar (FSLR) shares does the CTO hold after these transactions?

Following the reported transactions, Chief Technology Officer Markus Gloeckler directly owned 10,348 shares of First Solar common stock and held 853 remaining restricted stock units. These figures come directly from the Form 4 ownership totals after the vesting and tax-related sale.

What is the origin and vesting schedule of the CTO’s FSLR restricted stock units?

The restricted stock units were granted on March 15, 2022 as part of First Solar’s annual equity award to executive officers. They vest in 20% increments on each anniversary of the grant date, starting one year after grant, according to the filing footnotes.

How many restricted stock units vested for the FSLR CTO in this Form 4?

The filing notes that 854 restricted stock units vested, representing 20% of the units granted on March 15, 2022. Each unit converts into one share of First Solar common stock upon vesting, consistent with the company’s 2020 Omnibus Incentive Compensation Plan.

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Accepted by SEC EDGAR 03/17/2026 - 07:28 PM 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
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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^*

Gloeckler Markus

(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 Technology 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		854(1)	A	$0	10,716	D
Common Stock	03/16/2026		S		368(2)	D	$200.8	10,348	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			854	(4)	(4)	Common Stock	854	$0	853	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).
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