MARA CEO sells 27,505 shares at $11.45

MARA’s CEO Frederick G. Thiel reported a pre-planned sale of 27,505 common shares under a Rule 10b5-1 trading plan, retaining over 4.3 million shares afterward.

Rhea-AI Filing Summary

MARA Holdings, Inc. (MARA) reported that Chief Executive Officer and director Frederick G. Thiel sold shares of common stock. On September 17, 2026, he sold 27,505 shares of MARA common stock at a price of $11.45 per share in an open-market or private transaction. After this sale, he continued to hold 4,308,192 shares of MARA common stock directly. The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on May 28, 2025, indicating it was pre-arranged under that plan.

Insider Trade Summary 10b5-1

Net Seller: 27,505 shares

Net Sell 1 txn

Insider Thiel Frederick G

Role Chief Executive Officer

Sold 27,505 shs ($315K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	27,505	$11.45	$315K

Holdings After Transaction: Common Stock — 4,308,192 shares (Direct)

Footnotes (1)

1. F1. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2025.

Key Figures

Shares sold: 27,505 shares Sale price per share: $11.45 per share Shares held after transaction: 4,308,192 shares +2 more

5 metrics

Shares sold 27,505 shares Common stock sold by CEO Frederick G. Thiel on September 17, 2026

Sale price per share $11.45 per share Price for the 27,505 MARA common shares sold on September 17, 2026

Shares held after transaction 4,308,192 shares Direct holdings of MARA common stock by Frederick G. Thiel following the sale

Rule 10b5-1 plan adoption date May 28, 2025 Date the CEO’s trading plan governing this sale was adopted

Transactions in this Form 4 1 sale transaction Single reported non-derivative sale of common stock

Key Terms

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

3 terms

Rule 10b5-1 trading plan regulatory

"The sale reported in this Form 4 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.

open market or private transaction market

"Sale in open market or private transaction"

non-derivative financial

"transaction_type non-derivative"

FAQ

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

What insider transaction did MARA Holdings, Inc. (MARA) report for its CEO?

MARA reported that CEO Frederick G. Thiel sold 27,505 shares of common stock on September 17, 2026 at $11.45 per share, in an open-market or private transaction, and continued to hold shares afterward.

How many MARA (MARA) shares does CEO Frederick G. Thiel hold after this Form 4 sale?

After the reported sale, CEO Frederick G. Thiel directly holds 4,308,192 shares of MARA common stock, as stated in the Form 4 filing’s post-transaction holdings field.

Was the MARA (MARA) CEO’s September 17, 2026 share sale under a Rule 10b5-1 plan?

Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2025, and the Rule 10b5-1 checkbox is affirmed.

What was the price for the MARA (MARA) shares sold by the CEO on September 17, 2026?

The filing reports that the 27,505 shares of MARA common stock were sold at a price of $11.45 per share, identified as a per-share transaction price.

Is this MARA (MARA) Form 4 transaction a purchase or a sale?

It is a sale transaction. The Form 4 identifies the transaction code as a sale and classifies the direction as a sell of 27,505 shares of common stock.

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

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Available on EDGAR 09/18/2026 - 07:00 PM Accepted by SEC EDGAR 09/18/2026 - 07:00 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).

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^*

Thiel Frederick G

(Last) (First) (Middle)

C/O MARA HOLDINGS, INC.

1010 SOUTH FEDERAL HIGHWAY, SUITE 2700

(Street)

HALLANDALE BEACH FLORIDA 33009

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MARA Holdings, Inc. [ MARA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/17/2026

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	09/17/2026		S(1)		27,505	D	$11.45	4,308,192	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. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2025.

	/s/ Zabi Nowaid, Attorney-in-Fact for Fred Thiel	09/18/2026
	** 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)