MARA Holdings (MARA) CEO trades 27,505 shares under Rule 10b5-1 plan

Rhea-AI Filing Summary

MARA Holdings, Inc. reports that Frederick G. Thiel, its Chief Executive Officer and director, sold 27,505 shares of Common Stock on July 17, 2026 at $10.90 per share. The transaction was executed under a Rule 10b5-1 trading plan adopted on May 28, 2025, leaving him with 4,471,403 shares held directly.

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 ($300K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	27,505	$10.90	$300K

Holdings After Transaction: Common Stock — 4,471,403 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: $10.90 per share Shares owned after sale: 4,471,403 shares +1 more

4 metrics

Shares sold 27,505 shares Common Stock sale on July 17, 2026 by the CEO

Sale price $10.90 per share Price for the 27,505 Common Stock shares sold on July 17, 2026

Shares owned after sale 4,471,403 shares Direct Common Stock holdings of Frederick G. Thiel following the transaction

10b5-1 plan adoption date May 28, 2025 Date the Rule 10b5-1 trading plan governing the reported sale was adopted

Key Terms

Rule 10b5-1 trading plan, Form 4, Chief Executive Officer

3 terms

Rule 10b5-1 trading plan regulatory

"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person"

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 to a Rule 10b5-1 plan"

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.

Chief Executive Officer financial

"Reporting person Frederick G. Thiel serves as Chief Executive Officer and officer of the issuer"

A chief executive officer (CEO) is the top leader of a company, responsible for making major decisions, setting goals, and guiding the organization’s overall direction. Think of the CEO as the captain of a ship, steering it toward success. Investors pay close attention to the CEO because their leadership and strategy can significantly influence the company's performance and future growth.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/20/2026 - 07:00 PM Accepted by SEC EDGAR 07/20/2026 - 07:00 PM Learn about SEC filing dates

FAQ

What insider transaction did MARA (MARA) disclose in this Form 4?

MARA disclosed that CEO Frederick G. Thiel sold 27,505 shares of Common Stock on July 17, 2026. The sale was reported as a non-derivative disposition and executed under a Rule 10b5-1 trading plan previously adopted by the reporting person.

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

Frederick G. Thiel sold 27,505 shares of MARA Holdings Common Stock at a price of $10.90 per share. This was categorized as a sale in an open market or private transaction, according to the transaction code description in the filing.

How many MARA (MARA) shares does the CEO hold after this sale?

After the reported transaction, Frederick G. Thiel directly owns 4,471,403 shares of MARA Holdings Common Stock. This figure reflects his direct holdings immediately following the July 17, 2026 sale disclosed in the Form 4 filing.

Was the MARA (MARA) CEO’s stock sale made under a Rule 10b5-1 plan?

Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 trading plan. A footnote specifies that the plan was adopted on May 28, 2025, and the form-level 10b5-1 checkbox is marked as affirming plan usage.

When was the MARA (MARA) CEO’s Rule 10b5-1 trading plan adopted?

The Rule 10b5-1 trading plan covering this sale was adopted on May 28, 2025. The footnote explains that the July 17, 2026 sale of 27,505 shares was executed pursuant to this pre-arranged trading plan by the reporting person.

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)
07/17/2026

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	07/17/2026		S(1)		27,505	D	$10.9	4,471,403	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	07/20/2026
	** 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)