First Solar executive reports award vesting, tax share sale

First Solar Chief Supply Chain Officer Michael Koralewski reported two stock transactions involving company common shares.

Rhea-AI Filing Summary

First Solar Chief Supply Chain Officer Michael Koralewski reported two stock transactions involving company common shares. On February 27, 2026, he acquired 2,826 shares at no cost from the vesting of performance share units that were granted on March 6, 2023 and tied to multi-year performance goals. On March 3, 2026, 1,330 shares were sold by the company to cover tax withholding obligations related to that vesting, a disposition that did not represent an open-market sale by Koralewski. After these transactions, he directly held 12,865 shares of First Solar common stock.

Insider Trade Summary

Net Buyer: 1,496 shares

Net Buy 2 txns

Insider Koralewski Michael

Role Chief Supply Chain Officer

Sold 1,330 shs ($261K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,330	$195.93	$261K
Grant/Award	Common Stock	2,826	$0.00	$0.00

Holdings After Transaction: Common Stock — 12,865 shares (Direct)

Footnotes (2)

1. F1. 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. F2. Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the performance share units.

FAQ

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

First Solar reported that Michael Koralewski received 2,826 common shares from vesting performance share units and 1,330 shares were sold to cover tax withholding. Both transactions involved equity compensation rather than discretionary open-market trading activity.

How many First Solar (FSLR) shares did Michael Koralewski acquire in the latest Form 4?

Michael Koralewski acquired 2,826 First Solar common shares at no cost through the vesting of performance share units. These awards were granted in March 2023 and vested over an approximately three-year period based on achieving specified performance objectives.

Why were 1,330 First Solar (FSLR) shares sold in Michael Koralewski’s Form 4?

The 1,330 First Solar shares were sold by the company to satisfy tax withholding obligations triggered by the vesting of performance share units. This represents a tax-related disposition rather than a discretionary open-market sale by Michael Koralewski personally.

What is Michael Koralewski’s direct First Solar (FSLR) share ownership after these transactions?

After the reported transactions, Michael Koralewski directly held 12,865 shares of First Solar common stock. This balance reflects the net effect of the vested performance share units and the shares sold to cover associated tax withholding obligations.

How were the performance share units in First Solar (FSLR) Form 4 structured?

The performance share units were granted on March 6, 2023 and vested over an approximately three-year performance period. Vesting was contingent upon achieving specified performance objectives, leading to the issuance of 2,826 First Solar common shares to Michael Koralewski.

Does the Form 4 indicate open-market selling by First Solar (FSLR) executive Michael Koralewski?

The Form 4 shows a sale of 1,330 shares executed by the issuer solely to cover tax withholding related to vesting awards. It does not reflect a discretionary open-market sale decision by Michael Koralewski of his personal holdings.

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Accepted by SEC EDGAR 03/03/2026 - 08:22 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
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^*

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)
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		2,826(1)	A	$0	14,195	D
Common Stock	03/03/2026		S		1,330(2)	D	$195.93	12,865	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).
** 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.
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