First Solar (FSLR) CTO receives 7,065 shares as PSUs vest; 3,425 withheld

Rhea-AI Filing Summary

First Solar, Inc.’s Chief Technology Officer Markus Gloeckler reported performance-based equity vesting and related tax-share withholding. On February 27, 2026, he acquired 7,065 shares of common stock at $0 per share upon vesting of performance share units granted on March 6, 2023, which vested over an approximately three-year period contingent on performance objectives. On March 3, 2026, 3,425 shares of common stock were sold by the issuer at $195.93 per share to satisfy tax withholding obligations from that vesting. After these transactions, Gloeckler directly owned 11,677 common shares.

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^*

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)
02/27/2026

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	02/27/2026		A		7,065(1)	A	$0	15,102	D
Common Stock	03/03/2026		S		3,425(2)	D	$195.93	11,677	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. Represents the acquisition of shares of common stock issued upon the vesting of the performance share units granted on March 6, 2023, which performance share unit awards vested over an approximately three-year performance period contingent upon the achievement of certain performance objectives.

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

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

What insider transactions did First Solar (FSLR) report for CTO Markus Gloeckler?

First Solar’s CTO Markus Gloeckler reported vesting of performance share units, acquiring 7,065 common shares at $0 per share, and a related sale of 3,425 shares at $195.93 per share to cover tax withholding obligations, leaving him with 11,677 directly owned shares.

How many First Solar (FSLR) shares did the CTO acquire through performance share vesting?

Markus Gloeckler acquired 7,065 First Solar common shares at $0 per share. These were issued upon vesting of performance share units granted on March 6, 2023, which vested over an approximately three-year period contingent on achieving specified performance objectives.

Why were 3,425 First Solar (FSLR) shares sold in Markus Gloeckler’s Form 4 filing?

The 3,425 First Solar shares were sold by the issuer to satisfy tax withholding obligations tied to the vesting of Gloeckler’s performance share units. This transaction is a tax-related disposition rather than a discretionary open-market sale of his personal holdings.

What is Markus Gloeckler’s First Solar (FSLR) share ownership after these transactions?

Following the performance share vesting and related tax-share sale, Markus Gloeckler directly owns 11,677 shares of First Solar common stock. This figure reflects his updated direct ownership immediately after both the share award and the tax withholding disposition.

What were the terms of the performance share units in First Solar (FSLR) CTO’s award?

The performance share units were granted on March 6, 2023 and vested over an approximately three-year performance period. Vesting was contingent on achieving certain performance objectives, and upon vesting they were settled in 7,065 shares of First Solar common stock.