First Solar CTO sells 4,254 shares under plan

First Solar, Inc. Chief Technology Officer Markus Gloeckler reported open-market or private sales of 4,254 shares of Common Stock.

Accepted by SEC EDGAR 08/05/2026 - 06:11 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

First Solar, Inc. Chief Technology Officer Markus Gloeckler reported open-market or private sales of 4,254 shares of Common Stock. He sold 2,625.0000 shares at $218.0200 and 800.0000 shares at $222.0000 on August 3, 2026, and 829.0000 shares at $248.0000 on August 4, 2026. All transactions were executed under a previously adopted Rule 10b5-1 trading plan dated May 4, 2026.

Insider Trade Summary 10b5-1

Net Seller: 4,254 shares

Net Sell 3 txns

Insider Gloeckler Markus

Role Chief Technology Officer

Sold 4,254 shs ($955K)

Share of Position Sold 39.0%

Type	Security	Shares	Price	Value
Sale	Common Stock F1	829	$248.00	$206K
Sale	Common Stock F1	800	$222.00	$178K
Sale	Common Stock F1	2,625	$218.02	$572K

Holdings After Transaction: Common Stock — 6,642 shares (Direct)

Holdings Before and After: Common Stock, 10,896 to 6,642 shares (Direct)

Other Insiders: 1 other insider reported open-market sales of this stock in the 30 days up to this filing.

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

Total shares sold: 4254 shares Sale on August 3, 2026 at $218.0200: 2625.0000 shares at $218.0200 Sale on August 3, 2026 at $222.0000: 800.0000 shares at $222.0000 +1 more

4 metrics

Total shares sold 4254 shares Aggregate Common Stock shares sold across three transactions

Sale on August 3, 2026 at $218.0200 2625.0000 shares at $218.0200 Non-derivative Common Stock sale by CTO Markus Gloeckler

Sale on August 3, 2026 at $222.0000 800.0000 shares at $222.0000 Non-derivative Common Stock sale by CTO Markus Gloeckler

Sale on August 4, 2026 at $248.0000 829.0000 shares at $248.0000 Non-derivative Common Stock sale by CTO Markus Gloeckler

Key Terms

Rule 10b5-1 trading plan, Sale in open market or private transaction, Common Stock, Chief Technology Officer

4 terms

Rule 10b5-1 trading plan regulatory

"This transaction was effected pursuant to a Rule 10b5-1 trading plan"

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.

Sale in open market or private transaction regulatory

"transaction_code_description: Sale in open market or private transaction"

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Chief Technology Officer other

"officer_title: Chief Technology Officer"

The chief technology officer is the senior executive who sets a company's technology vision and oversees development, engineering, and technical operations—think of them as the lead architect and head mechanic who decides what tools the business builds and how they run. Their choices affect product direction, cost structure, cybersecurity and scalability, so investors watch the CTO to gauge a company’s ability to innovate, compete and manage technical risk.

FAQ

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

What insider stock transactions did First Solar (FSLR) report for Markus Gloeckler?

First Solar reported that CTO Markus Gloeckler sold 4,254 shares of Common Stock in three transactions. The sales occurred on August 3 and 4, 2026, as open-market or private transactions executed under a previously adopted Rule 10b5-1 trading plan.

How many First Solar (FSLR) shares did CTO Markus Gloeckler sell, and at what prices?

Markus Gloeckler sold 4,254 First Solar shares. On August 3, 2026, he sold 2,625.0000 shares at $218.0200 and 800.0000 shares at $222.0000. On August 4, 2026, he sold 829.0000 shares at $248.0000 per share.

Were Markus Gloeckler’s First Solar (FSLR) share sales made under a Rule 10b5-1 plan?

Yes. All reported transactions were effected under a Rule 10b5-1 trading plan. A footnote states the plan was previously adopted by Markus Gloeckler on May 4, 2026, and each sale transaction is linked to that footnote.

What is Markus Gloeckler’s position at First Solar (FSLR) in this Form 4?

The reporting person, Markus Gloeckler, is identified as Chief Technology Officer of First Solar, Inc. The Form 4 shows he executed three non-derivative Common Stock sales reported as directly owned (ownership code D).

Does this First Solar (FSLR) Form 4 include any derivative security transactions?

No derivative transactions are listed. The filing reports three non-derivative Common Stock sale transactions, and the transaction summary shows a derivativeTransactionCount of 0, indicating only common share sales were reported in this Form 4.

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

Form 4 Insider Transactions: What Each Field Means →

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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).

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)
08/03/2026

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	08/03/2026(1)		S		800	D	$222	10,096	D
Common Stock	08/03/2026(1)		S		2,625	D	$218.02	7,471	D
Common Stock	08/04/2026(1)		S		829	D	$248	6,642	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

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	08/05/2026
	** 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)