First Solar CTO sells $160K in stock under plan

Markus Gloeckler’s $200/share sale under a Rule 10b5-1 plan leaves him with 5,842 shares after selling 800.

Rhea-AI Filing Summary

FIRST SOLAR, INC. (FSLR) reported that Chief Technology Officer Markus Gloeckler sold 800 shares of common stock on September 1, 2026 in a sale described as an open market or private transaction at $200 per share. After this transaction, he directly holds 5,842 shares. The sale was carried out under a Rule 10b5-1 trading plan adopted on May 4, 2026.

Insider Trade Summary 10b5-1

Net Seller: 800 shares

Net Sell 1 txn

Insider Gloeckler Markus

Role Chief Technology Officer

Sold 800 shs ($160K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	800	$200.00	$160K

Holdings After Transaction: Common Stock — 5,842 shares (Direct)

Footnotes (1)

1. F1. This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on May 4, 2026.

Key Figures

Shares sold: 800 shares Sale price per share: $200.00 per share Approximate transaction value: $160,000 +2 more

5 metrics

Shares sold 800 shares Common stock sale reported for September 1, 2026 by the Chief Technology Officer

Sale price per share $200.00 per share Price for the 800 shares of common stock sold on September 1, 2026

Approximate transaction value $160,000 Computed from 800 shares sold at $200.00 per share

Shares held after transaction 5,842 shares Direct ownership of common stock by Markus Gloeckler after the reported sale

Rule 10b5-1 plan adoption date May 4, 2026 Adoption date of the trading plan under which the September 1, 2026 sale was executed

Key Terms

Rule 10b5-1 trading plan, open market or private transaction

2 terms

Rule 10b5-1 trading plan regulatory

"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on May 4, 2026."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open market or private transaction market

"Sale in open market or private transaction"

FAQ

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

What insider transaction did FSLR report for Markus Gloeckler?

FIRST SOLAR, INC. reported that Chief Technology Officer Markus Gloeckler sold 800 shares of common stock on September 1, 2026 in an open market or private transaction at $200 per share, under a pre-established Rule 10b5-1 trading plan.

How many FIRST SOLAR (FSLR) shares did Markus Gloeckler sell and at what price?

Markus Gloeckler sold 800 shares of FIRST SOLAR common stock at $200 per share on September 1, 2026, resulting in a reported transaction value of approximately $160,000 before any fees or taxes.

How many FIRST SOLAR (FSLR) shares does Markus Gloeckler hold after this transaction?

After the September 1, 2026 sale, Markus Gloeckler directly holds 5,842 shares of FIRST SOLAR common stock, according to the reported post-transaction ownership figure.

Was the FSLR insider sale by Markus Gloeckler under a Rule 10b5-1 plan?

Yes. The filing states that the September 1, 2026 sale of 800 FIRST SOLAR shares by Markus Gloeckler was effected pursuant to a Rule 10b5-1 trading plan that he previously adopted on May 4, 2026.

What role does Markus Gloeckler hold at FIRST SOLAR (FSLR)?

Markus Gloeckler is identified as the Chief Technology Officer of FIRST SOLAR, INC. in connection with the reported September 1, 2026 sale of 800 shares of common stock.

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

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Available on EDGAR 09/02/2026 - 11:29 AM EDT Accepted by SEC EDGAR 09/02/2026 - 11:28 AM EDT 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).

X

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 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 Technology Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026

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	09/01/2026(1)		S		800	D	$200	5,842	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. This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on May 4, 2026.

	/s/ Jason E. Dymbort, attorney-in-fact	09/02/2026
	** 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)