First Solar (NASDAQ: FSLR) VP reports RSU vesting and small tax-driven share sale

Rhea-AI Filing Summary

FIRST SOLAR, INC. executive Nathan B. Theurer, VP – Global Controller and CAO, reported routine equity compensation activity tied to restricted stock units. On May 4, 2026, 44 shares of common stock were issued upon vesting of 25% of his May 1, 2025 RSU grant. Each RSU converts into one share under the company’s 2020 Omnibus Incentive Compensation Plan.

To satisfy tax withholding obligations from this vesting, the issuer sold 13 shares of common stock at $215.63 per share on May 5, 2026. After these transactions, Theurer directly holds 31 shares of common stock and 134 restricted stock units. The filing reflects compensation-related vesting and tax withholding rather than discretionary open‑market trading.

Insights

Equity compensation and insider-transactions analyst

Routine RSU vesting with tax withholding; minimal signal on insider sentiment.

The filing shows 44 shares of FIRST SOLAR, INC. common stock issued from RSU vesting and 13 shares sold by the issuer to cover tax withholding at $215.63 per share. This pattern is typical when equity awards vest.

Following the activity, Nathan B. Theurer holds 31 common shares and 134 RSUs, indicating a continued equity stake. Because the sale is explicitly for tax obligations, not a discretionary open-market decision, it carries limited information about his outlook on FSLR stock.

Insider Trade Summary

Net Seller: 13 shares ($2,803)

Net Sell 3 txns

Insider Theurer Nathan B.

Role VP - Global Controller and CAO

Sold 13 shs ($3K)

Type	Security	Shares	Price	Value
Sale	Common Stock	13	$215.63	$3K
Exercise	Restricted Stock Units	44	$0.00	--
Exercise	Common Stock	44	$0.00	--

Holdings After Transaction: Common Stock — 31 shares (Direct, null); Restricted Stock Units — 134 shares (Direct, null)

Footnotes (1)

1. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on May 1, 2025. Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units. 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. The restricted stock units were granted on May 1, 2025 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on May 1, 2025 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

Key Figures

Tax withholding sale: 13 shares at $215.63 RSU vesting amount: 44 shares Common shares held after: 31 shares +1 more

4 metrics

Tax withholding sale 13 shares at $215.63 Shares sold by issuer on May 5, 2026 to cover taxes

RSU vesting amount 44 shares Common shares issued from RSU vesting on May 4, 2026

Common shares held after 31 shares Direct FIRST SOLAR common stock ownership after transactions

RSUs outstanding after 134 units Restricted stock units remaining after May 4, 2026 vesting

Key Terms

Restricted Stock Units, tax withholding obligations, 2020 Omnibus Incentive Compensation Plan

3 terms

Restricted Stock Units financial

"Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on May 1, 2025."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligations financial

"Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units."

2020 Omnibus Incentive Compensation Plan financial

"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."

Form 4 Insider Transactions: What Each Field Means →

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 ARIZONA 85018

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	05/04/2026		M		44(1)	A	$0	44	D
Common Stock	05/05/2026		S		13(2)	D	$215.63	31	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)	05/04/2026		M			44	(4)	(4)	Common Stock	44	$0	134	D

Explanation of Responses:

1. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on May 1, 2025.

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 May 1, 2025 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on May 1, 2025 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

	/s/ Jason E. Dymbort, attorney-in-fact	05/05/2026
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did FSLR executive Nathan Theurer report on this Form 4?

Nathan Theurer reported RSU-related activity: 44 FIRST SOLAR shares were issued upon vesting of restricted stock units, and 13 shares were sold by the issuer at $215.63 per share to cover tax withholding. He now directly holds 31 common shares and 134 RSUs.

Were the FSLR shares sold by Nathan Theurer an open-market sale or tax withholding?

The filing states the 13 FIRST SOLAR shares were sold by the issuer to satisfy tax withholding obligations tied to RSU vesting, rather than a discretionary open-market sale by Nathan Theurer. This indicates a routine tax-related disposition, not a change in investment stance.

How many First Solar (FSLR) shares does Nathan Theurer hold after these transactions?

After the reported transactions, Nathan Theurer directly holds 31 shares of FIRST SOLAR common stock and 134 restricted stock units. The RSUs entitle him to receive common shares upon future vesting dates, according to the company’s 2020 Omnibus Incentive Compensation Plan.

What triggered the RSU vesting reported for First Solar (FSLR) executive Nathan Theurer?

The footnotes explain the 44 shares issued reflect vesting of 25% of RSUs granted on May 1, 2025. These restricted stock units vest annually in 25% increments on each anniversary of the grant date as part of FIRST SOLAR’s 2020 Omnibus Incentive Compensation Plan.

Does Nathan Theurer’s Form 4 for FSLR suggest a major change in his ownership?

The Form 4 reflects routine equity compensation: partial vesting of RSUs and tax-related share sales. Post-transaction, he holds 31 common shares and 134 RSUs. The relatively small net share change suggests no major shift in his overall economic exposure to FIRST SOLAR stock.