MARA Holdings CEO sells 27.5K shares at $9.21

MARA Holdings, Inc. (MARA) reported that Chief Executive Officer and director Frederick G. Thiel sold 27,505 shares of common stock on 2026-08-17 at $9.21 per share.

Rhea-AI Filing Summary

MARA Holdings, Inc. (MARA) reported that Chief Executive Officer and director Frederick G. Thiel sold 27,505 shares of common stock on 2026-08-17 at $9.21 per share. Following this sale, Thiel directly holds 4,335,697 shares of MARA common stock. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by Thiel on May 28, 2025.

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 ($253K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	27,505	$9.21	$253K

Holdings After Transaction: Common Stock — 4,335,697 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: $9.21 per share Shares owned after transaction: 4,335,697 shares +1 more

4 metrics

Shares sold 27,505 shares Common stock sold by CEO Frederick G. Thiel on 2026-08-17

Sale price per share $9.21 per share Price for the 27,505 MARA common shares sold

Shares owned after transaction 4,335,697 shares Direct MARA common stock holdings of Frederick G. Thiel following the sale

10b5-1 plan adoption date May 28, 2025 Date CEO Thiel adopted the Rule 10b5-1 trading plan used for this sale

Key Terms

Rule 10b5-1 trading plan, Form 4, open market or private transaction

3 terms

Rule 10b5-1 trading plan regulatory

"The sale 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.

Form 4 regulatory

"The sale reported in this Form 4 was effected pursuant"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

open market or private transaction financial

"transaction code description: Sale in open market or private transaction"

FAQ

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

What insider transaction did MARA CEO Frederick G. Thiel report for MARA stock?

Frederick G. Thiel reported a sale of 27,505 MARA common shares on 2026-08-17 at $9.21 per share. After this transaction, he directly owns 4,335,697 shares of MARA Holdings, Inc. common stock.

Was the recent MARA (MARA) insider 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 Frederick G. Thiel on May 28, 2025. Such pre-arranged plans automate trading based on preset instructions.

How many MARA (MARA) shares did the CEO sell and at what price?

Frederick G. Thiel sold 27,505 shares of MARA common stock at a price of $9.21 per share. The transaction is coded as a sale in the open market or private transaction.

How many MARA (MARA) shares does the CEO own after the reported sale?

After the transaction, Frederick G. Thiel directly owns 4,335,697 shares of MARA Holdings, Inc. common stock. This post-transaction ownership figure is disclosed in the Form 4 as total shares following the sale.

What does the transaction code S mean in the MARA (MARA) Form 4 filing?

In this Form 4, transaction code S indicates a sale in an open market or private transaction of MARA common stock. The filing shows 27,505 shares sold at a price of $9.21 per share.

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

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Accepted by SEC EDGAR 08/19/2026 - 07:00 PM 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^*

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)
08/17/2026

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	08/17/2026		S(1)		27,505	D	$9.21	4,335,697	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	08/19/2026
	** 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)