First Solar (NASDAQ: FSLR) exec nets shares after RSU vesting and tax sale

Rhea-AI Filing Summary

Chief Supply Chain Officer Michael Koralewski of First Solar, Inc. reported routine equity compensation activity. On March 13, 2026, 640 restricted stock units vested and were converted into 640 shares of common stock under the company’s 2020 Omnibus Incentive Compensation Plan.

On March 16, 2026, 264 of these shares were sold by the company at $200.80 per share to satisfy tax withholding obligations related to the vesting, rather than as a discretionary open-market sale. After these transactions, Koralewski directly owned 14,339 shares of First Solar common stock, indicating a relatively small net change in his overall holdings.

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^*

Koralewski Michael

(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 Supply Chain 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		640(1)	A	$0	14,603	D
Common Stock	03/16/2026		S		264(2)	D	$200.8	14,339	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			640	(4)	(4)	Common Stock	640	$0	640	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
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FAQ

What insider transactions did First Solar (FSLR) report for Michael Koralewski?

First Solar’s Chief Supply Chain Officer Michael Koralewski had 640 restricted stock units vest into common shares. Subsequently, 264 shares were sold by the company to cover tax withholding obligations, leaving him with 14,339 directly owned shares of First Solar common stock.

Was the First Solar (FSLR) insider sale by Michael Koralewski an open-market sale?

The 264-share disposition was not a discretionary open-market sale. Footnotes state the shares were sold by First Solar to satisfy tax withholding obligations arising from RSU vesting, making this a compensation-related, mechanical transaction rather than a typical market-driven share sale.

How many First Solar (FSLR) shares did Michael Koralewski acquire through RSU vesting?

On March 13, 2026, 640 restricted stock units vested for Michael Koralewski, converting into 640 shares of First Solar common stock. These RSUs were granted on March 15, 2022 and vest annually in 20% increments on each anniversary of the grant date.

How many First Solar (FSLR) shares does Michael Koralewski hold after the reported transactions?

Following the March 2026 RSU vesting and related tax-withholding sale, Michael Koralewski directly owns 14,339 shares of First Solar common stock. This figure reflects his position after receiving 640 shares from vested RSUs and the subsequent 264-share sale for tax withholding.

What is the vesting schedule of Michael Koralewski’s First Solar (FSLR) restricted stock units?

The restricted stock units were granted on March 15, 2022 as part of First Solar’s annual executive equity awards. They are scheduled to vest at a rate of 20% each year on the grant date anniversary, beginning on the first anniversary of the March 15, 2022 grant.

At what price were the First Solar (FSLR) shares for tax withholding sold?

The 264 shares sold to satisfy tax withholding obligations were transacted at $200.80 per share. This sale was executed by First Solar in connection with the vesting of Michael Koralewski’s restricted stock units, according to the Form 4’s transaction details and accompanying footnotes.