MARA insider sale — 1,000 shares sold under 10b5-1 at $20.71

Rhea-AI Filing Summary

Douglas K. Mellinger, a director of MARA Holdings, Inc. (MARA), reported a sale of 1,000 shares of Common Stock on 10/07/2025 at a price of $20.71 per share. The Form 4 states the sale was executed under a Rule 10b5-1 trading plan adopted on 03/06/2025. After the transaction, the reporting person beneficially owned 171,859 shares, held directly. The filing is signed by an attorney-in-fact on behalf of the reporting person with a signature date of 10/08/2025.

Insider Trade Summary

Net Seller: 1,000 shares

Net Sell 1 txn

Insider MELLINGER DOUGLAS K

Role Director

Sold 1,000 shs ($21K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,000	$20.71	$21K

Holdings After Transaction: Common Stock — 171,859 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 March 6, 2025.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 10/08/2025 - 08:00 PM Learn about SEC filing dates

FAQ

What did MARA director Douglas Mellinger disclose on Form 4?

The Form 4 discloses a sale of 1,000 shares of MARA on 10/07/2025 at $20.71 per share, executed under a Rule 10b5-1 trading plan.

How many MARA shares does Douglas Mellinger own after the reported sale?

The filing reports 171,859 shares beneficially owned following the reported transaction.

Was the sale part of a pre-arranged plan?

Yes. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 03/06/2025.

What price was received for the shares sold by the MARA director?

The reported sale price was $20.71 per share for the 1,000 shares sold.

Who signed the Form 4 for Douglas Mellinger?

The Form 4 is signed by Zabi Nowaid, Attorney-in-Fact for Douglas K. Mellinger, dated 10/08/2025.

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^*

MELLINGER DOUGLAS K

(Last) (First) (Middle)

C/O MARA HOLDINGS, INC.

1010 SOUTH FEDERAL HIGHWAY, SUITE 2700

(Street)

HALLANDALE BEACH FL 33009

(City) (State) (Zip)

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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/07/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	10/07/2025		S(1)		1,000	D	$20.71	171,859	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 March 6, 2025.

	/s/ Zabi Nowaid, Attorney-in-Fact for Douglas K. Mellinger	10/08/2025
	** 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.