First Solar officer nets shares after RSU vesting

Rhea-AI Filing Summary

FIRST SOLAR, INC. Chief Supply Chain Officer Michael Koralewski reported routine equity compensation activity and a small related share sale. On May 4, 2026, 518 shares of common stock were issued upon vesting of restricted stock units granted on May 1, 2025, with each unit converting into one share under the 2020 Omnibus Incentive Compensation Plan.

On the same date, his restricted stock unit balance changed to 1,556 units, which continue to vest annually at a rate of 25% on each anniversary of the May 1, 2025 grant. On May 5, 2026, 215 shares of common stock were sold at $215.63 per share to satisfy tax withholding obligations tied to the vesting, leaving him with 14,642 common shares held directly.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Koralewski Michael

Role Chief Supply Chain Officer

Sold 215 shs ($46K)

Approx. gross sale proceeds $46K

Approx. exercise cost $0.00

Type	Security	Shares	Price	Value
Sale	Common Stock	215	$215.63	$46K
Exercise	Restricted Stock Units	518	$0.00	$0.00
Exercise	Common Stock	518	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 1,556 contracts (Direct); Common Stock — 14,642 shares (Direct)

Footnotes (4)

1. F1. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on May 1, 2025.
2. F2. Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units.
3. F3. 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. F4. 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

Shares sold for tax withholding: 215 shares Sale price: $215.63 per share Shares acquired via RSU vesting: 518 shares +3 more

6 metrics

Shares sold for tax withholding 215 shares Common stock sold on May 5, 2026 at $215.63 per share

Sale price $215.63 per share Price for 215 First Solar common shares on May 5, 2026

Shares acquired via RSU vesting 518 shares Common shares issued on May 4, 2026 upon RSU vesting

Common shares held after transactions 14,642 shares Direct holdings after May 5, 2026 sale

Remaining restricted stock units 1,556 RSUs Balance after 518 units vested from May 1, 2025 grant

RSU vesting rate 25% annually Annual vesting on each anniversary of May 1, 2025 grant

Key Terms

restricted stock units, tax withholding obligations, 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."

Omnibus Incentive Compensation Plan financial

"in accordance with the Issuer's 2020 Omnibus Incentive Compensation Plan."

An omnibus incentive compensation plan is a single, flexible program that lets a company grant different kinds of pay — such as cash bonuses, stock options, restricted stock, or performance awards — to employees, executives and directors. Investors care because the plan affects how much ownership can be given away (dilution), how much the company spends on pay, and whether executives’ goals are aligned with shareholders, much like a menu that decides what rewards staff can pick and how costly they are.

FAQ

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

What insider transactions did FIRST SOLAR (FSLR) report for Michael Koralewski?

FIRST SOLAR’s Chief Supply Chain Officer received 518 shares of common stock upon restricted stock unit vesting and sold 215 shares at $215.63 per share. The sale was made to cover tax withholding obligations related to the equity award vesting.

How many FIRST SOLAR (FSLR) shares does Michael Koralewski hold after these transactions?

After the reported transactions, Michael Koralewski directly holds 14,642 shares of FIRST SOLAR common stock. This reflects the net effect of 518 vested shares and the 215-share sale for tax withholding associated with his restricted stock unit award.

What happened to Michael Koralewski’s restricted stock units in FIRST SOLAR (FSLR)?

On May 4, 2026, 518 restricted stock units converted into common shares. Following this vesting event, Koralewski’s remaining balance is 1,556 restricted stock units, which vest annually at 25% on each anniversary of the May 1, 2025 grant date.

Why were some FIRST SOLAR (FSLR) shares sold in this Form 4 filing?

The Form 4 notes that 215 shares of FIRST SOLAR common stock were sold to the issuer to satisfy tax withholding obligations triggered by the vesting of restricted stock units, rather than as a discretionary open-market sale for investment purposes.

What plan governs Michael Koralewski’s restricted stock units at FIRST SOLAR (FSLR)?

Koralewski’s restricted stock units are granted under FIRST SOLAR’s 2020 Omnibus Incentive Compensation Plan. Each unit represents the right to receive one share of common stock upon vesting, with the May 1, 2025 grant vesting in 25% annual installments.

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

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Accepted by SEC EDGAR 05/05/2026 - 07:54 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 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)
	Chief Supply Chain Officer

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		518(1)	A	$0	14,857	D
Common Stock	05/05/2026		S		215(2)	D	$215.63	14,642	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			518	(4)	(4)	Common Stock	518	$0	1,556	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)