First Solar VP reports PSU vesting and tax sale

FIRST SOLAR, INC. executive Nathan B. Theurer reported two stock transactions involving company common shares.

Rhea-AI Filing Summary

FIRST SOLAR, INC. executive Nathan B. Theurer reported two stock transactions involving company common shares. On February 27, he acquired 141 shares at no cost through the vesting of performance share units granted on March 6, 2023, following an approximately three-year performance period tied to specific performance goals. On March 3, 49 shares were sold by the company to cover tax withholding obligations related to that vesting, leaving him with 92 shares of common stock held directly.

Insider Trade Summary

Net Seller: 49 shares

Net Sell 2 txns

Insider Theurer Nathan B.

Role VP - Global Controller and CAO

Sold 49 shs ($10K)

Type	Security	Shares	Price	Value
Sale	Common Stock	49	$195.93	$10K
Grant/Award	Common Stock	141	$0.00	$0.00

Holdings After Transaction: Common Stock — 92 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

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did FSLR executive Nathan B. Theurer report?

Nathan B. Theurer reported an award of 141 First Solar common shares from vesting performance share units and a sale of 49 shares to cover related tax withholding obligations. After these transactions, he directly held 92 shares of First Solar common stock.

How many First Solar (FSLR) shares did Nathan B. Theurer acquire and how?

He acquired 141 First Solar common shares at no cost through the vesting of performance share units granted on March 6, 2023. These units vested over about three years, contingent on achieving specified performance objectives set by the company for that award.

Why were 49 First Solar (FSLR) shares sold in Nathan B. Theurer’s Form 4?

The 49 First Solar shares were sold by the issuer solely to satisfy tax withholding obligations triggered by the vesting of Theurer’s performance share units. This type of sale is a common mechanism to cover taxes without requiring the executive to pay cash.

What is Nathan B. Theurer’s direct First Solar (FSLR) share ownership after these transactions?

Following the award and tax-related sale, Nathan B. Theurer directly owns 92 shares of First Solar common stock. This figure reflects his remaining holdings after 141 shares were issued upon vesting and 49 shares were sold to cover associated tax withholding.

What performance period applied to Nathan B. Theurer’s First Solar performance share units?

The performance share units that vested into 141 First Solar shares had an approximately three-year performance period beginning with their grant on March 6, 2023. Vesting depended on meeting certain defined performance objectives over that multi-year timeframe established by the company.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/03/2026 - 08:18 PM EST 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^*

Theurer Nathan B.

(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)
	VP - Global Controller and CAO

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		141(1)	A	$0	141	D
Common Stock	03/03/2026		S		49(2)	D	$195.93	92	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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