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  4. [Form 4] FIRST SOLAR, INC. Insider Trading Activity

FIRST SOLAR, INC. reported $5.2B in revenue and $1.5B in net income for fiscal 2025. See the full FSLR financial statements: income statement, balance sheet, cash flow and ratios, each column linked to its SEC filing.

First Solar CTO reports RSU vesting and tax-share sale

First Solar, Inc. Chief Technology Officer Markus Gloeckler reported routine equity compensation activity and related share sales.

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

First Solar, Inc. Chief Technology Officer Markus Gloeckler reported routine equity compensation activity and related share sales. On March 6, 2026, he acquired a total of 3,150 shares of common stock at $0.00 per share through the vesting and conversion of restricted stock units granted in prior years, and received a new grant of 3,066 restricted stock units as part of the company’s annual executive equity program.

On March 9, 2026, 1,325 shares of common stock were sold at an average price of $190.36 per share in open-market transactions described as being made by the issuer to satisfy tax withholding obligations arising from the RSU vesting. Following these transactions, Gloeckler directly holds 9,862 shares of First Solar common stock.

Positive

  • None.

Negative

  • None.
Insider Gloeckler Markus
Role Chief Technology Officer
Sold 1,325 shs ($252K)
Approx. gross sale proceeds $252K
Approx. exercise cost $0.00
Type Security Shares Price Value
Sale Common Stock 320 $190.36 $61K
Sale Common Stock 199 $190.36 $38K
Sale Common Stock 358 $190.36 $68K
Sale Common Stock 448 $190.36 $85K
Exercise Restricted Stock Units 760 $0.00 $0.00
Exercise Restricted Stock Units 471 $0.00 $0.00
Exercise Restricted Stock Units 852 $0.00 $0.00
Exercise Restricted Stock Units 1,067 $0.00 $0.00
Grant/Award Restricted Stock Units 3,066 $0.00 $0.00
Exercise Common Stock 760 $0.00 $0.00
Exercise Common Stock 471 $0.00 $0.00
Exercise Common Stock 852 $0.00 $0.00
Exercise Common Stock 1,067 $0.00 $0.00
Holdings After Transaction: Restricted Stock Units — 8,917 shares (Direct); Common Stock — 9,862 shares (Direct)
Footnotes (11)
  1. F1. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 6, 2021.
  2. F2. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 6, 2023.
  3. F3. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on March 6, 2024.
  4. F4. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on March 6, 2025.
  5. F5. Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units.
  6. F6. 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.
  7. F7. The restricted stock units were granted on March 6, 2021 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2021 vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date.
  8. F8. The restricted stock units were granted on March 6, 2023 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2023 vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date.
  9. F9. The restricted stock units were granted on March 6, 2024 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2024 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.
  10. F10. The restricted stock units were granted on March 6, 2025 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2025 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.
  11. F11. The restricted stock units were granted on March 6, 2026 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2026 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.

FAQ

What insider transactions did First Solar (FSLR) report for CTO Markus Gloeckler?
First Solar reported that CTO Markus Gloeckler had restricted stock units vest into 3,150 common shares and received a new grant of 3,066 RSUs. Subsequently, 1,325 shares were sold at $190.36 per share to cover tax withholding obligations tied to the vesting.

How many First Solar (FSLR) shares does CTO Markus Gloeckler hold after these transactions?
After the reported Form 4 transactions, Markus Gloeckler directly holds 9,862 shares of First Solar common stock. This figure reflects the net result of RSU vesting into shares and the sale of 1,325 shares to satisfy tax withholding obligations on March 9, 2026.

What restricted stock unit activity did First Solar (FSLR) disclose for its CTO?
First Solar disclosed that RSUs granted in 2021, 2023, 2024, and 2025 partially vested on March 6, 2026, converting into 3,150 common shares. The company also granted 3,066 new RSUs on March 6, 2026 under its 2020 Omnibus Incentive Compensation Plan for executive officers.

At what price were First Solar (FSLR) shares sold in the reported CTO transactions?
The 1,325 First Solar common shares associated with Markus Gloeckler’s Form 4 were sold at an average price of $190.36 per share. According to the footnotes, these sales were executed by the issuer to cover tax withholding obligations triggered by the vesting of restricted stock units.

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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*
Gloeckler Markus
(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 Technology Officer
3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026
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 03/06/2026 M 760(1) A $0 8,797 D
Common Stock 03/06/2026 M 471(2) A $0 9,268 D
Common Stock 03/06/2026 M 852(3) A $0 10,120 D
Common Stock 03/06/2026 M 1,067(4) A $0 11,187 D
Common Stock 03/09/2026 S 320(5) D $190.36 10,867 D
Common Stock 03/09/2026 S 199(5) D $190.36 10,668 D
Common Stock 03/09/2026 S 358(5) D $190.36 10,310 D
Common Stock 03/09/2026 S 448(5) D $190.36 9,862 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 (6) 03/06/2026 M 760 (7) (7) Common Stock 760 $0 0 D
Restricted Stock Units (6) 03/06/2026 M 471 (8) (8) Common Stock 471 $0 942 D
Restricted Stock Units (6) 03/06/2026 M 852 (9) (9) Common Stock 852 $0 1,705 D
Restricted Stock Units (6) 03/06/2026 M 1,067 (10) (10) Common Stock 1,067 $0 3,204 D
Restricted Stock Units (6) 03/06/2026 A 3,066 (11) (11) Common Stock 3,066 $0 3,066 D
Explanation of Responses:
1. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 6, 2021.
2. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 6, 2023.
3. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on March 6, 2024.
4. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on March 6, 2025.
5. Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units.
6. 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.
7. The restricted stock units were granted on March 6, 2021 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2021 vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date.
8. The restricted stock units were granted on March 6, 2023 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2023 vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date.
9. The restricted stock units were granted on March 6, 2024 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2024 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.
10. The restricted stock units were granted on March 6, 2025 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2025 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date.
11. The restricted stock units were granted on March 6, 2026 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2026 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 03/10/2026
** 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.

Source: View Original Filing on SEC EDGAR