MARA Holdings, Inc. (MARA) CEO sells 27,505 shares under 10b5-1 plan

Rhea-AI Filing Summary

MARA Holdings, Inc. Chief Executive Officer Frederick G. Thiel sold 27,505 shares of common stock on March 17, 2026 in an open-market transaction at an average price of $9.18 per share. The sale was executed under a pre-arranged Rule 10b5-1 trading plan, and Thiel now directly holds 4,788,954 shares.

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

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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)
03/17/2026

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	03/17/2026		S(1)		27,505	D	$9.18	4,788,954	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	03/19/2026
	** 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)

FAQ

What insider transaction did MARA CEO Frederick G. Thiel report on this Form 4?

Frederick G. Thiel reported selling 27,505 shares of MARA Holdings, Inc. common stock. The transaction was an open-market sale at an average price of $9.18 per share, as disclosed in the Form 4 insider trading report.

At what price did MARA CEO Frederick G. Thiel sell his shares?

Frederick G. Thiel sold his MARA Holdings, Inc. common stock at an average price of $9.18 per share. This price applies to the 27,505 shares reported as sold in the open-market transaction on March 17, 2026.

How many MARA shares does CEO Frederick G. Thiel hold after this sale?

After the reported sale, Frederick G. Thiel directly holds 4,788,954 shares of MARA Holdings, Inc. common stock. This figure represents his post-transaction direct ownership as disclosed in the Form 4 filing for the March 17, 2026 trade.

Was the MARA CEO’s share sale made under a Rule 10b5-1 trading plan?

Yes. The Form 4 footnote states the sale was effected under a Rule 10b5-1 trading plan. The plan was adopted by Frederick G. Thiel on May 28, 2025, indicating the transaction was pre-arranged rather than opportunistic.

What type of transaction is reported for MARA CEO Frederick G. Thiel?

The Form 4 reports an open-market sale of common stock by MARA Holdings, Inc. CEO Frederick G. Thiel. The transaction is coded “S”, which denotes a sale in an open market or private transaction under SEC reporting rules.

Does the MARA Form 4 show any derivative securities transactions for the CEO?

No derivative securities transactions are listed for Frederick G. Thiel in this Form 4. The filing discloses only a single non-derivative transaction, an open-market sale of 27,505 shares of MARA Holdings, Inc. common stock on March 17, 2026.