MARA Holdings CEO Frederick Thiel (MARA) sells 27,505 shares

Rhea-AI Filing Summary

MARA Holdings, Inc. Chief Executive Officer Frederick G. Thiel sold 27,505 shares of Common Stock in an open-market sale at $14.25 per share on June 17, 2026. The transaction was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on May 28, 2025.

After this sale, Thiel directly holds 4,562,009 shares of MARA Holdings common stock, indicating the transaction represents a small portion of his overall reported holdings.

Insider Trade Summary 10b5-1

Net Seller: 27,505 shares ($391,946)

Net Sell 1 txn

Insider Thiel Frederick G

Role Chief Executive Officer

Sold 27,505 shs ($392K)

Type	Security	Shares	Price	Value
Sale	Common Stock	27,505	$14.25	$392K

Holdings After Transaction: Common Stock — 4,562,009 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 27,505 shares Sale price: $14.25 per share Shares after transaction: 4,562,009 shares +1 more

4 metrics

Shares sold 27,505 shares Common Stock sold on June 17, 2026

Sale price $14.25 per share Open-market sale of Common Stock

Shares after transaction 4,562,009 shares Direct holdings following June 17, 2026 sale

Net shares sold 27,505 shares Net-sell direction in transaction summary

Key Terms

Common Stock, open-market sale, Rule 10b5-1 trading plan

3 terms

Common Stock financial

"security_title: "Common Stock" for the reported transaction"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

open-market sale financial

"transaction_action: "open-market sale" for the CEO’s trade"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/22/2026 - 07:00 PM Accepted by SEC EDGAR 06/22/2026 - 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)
06/17/2026

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	06/17/2026		S(1)		27,505	D	$14.25	4,562,009	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	06/22/2026
	** 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 Form 4?

Frederick G. Thiel reported selling 27,505 shares of MARA Holdings Common Stock. The shares were sold in an open-market transaction at $14.25 per share on June 17, 2026, as disclosed in the Form 4 filing.

How many MARA Holdings shares does the CEO hold after this Form 4 sale?

After the reported sale, Frederick G. Thiel directly holds 4,562,009 MARA Holdings shares. This shows the 27,505 shares sold are a small fraction of his overall reported ownership position in the company’s common stock.

Was the MARA CEO’s June 17, 2026 share sale part of a Rule 10b5-1 plan?

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

What price did MARA CEO Frederick G. Thiel receive per share in the reported sale?

He sold 27,505 shares of MARA Holdings Common Stock at $14.25 per share. This price reflects the execution level for the open-market transaction reported, not necessarily the full trading range for MARA shares that day.

Does the Form 4 for MARA indicate any option exercises or derivative transactions?

No. The reported activity involves only a non-derivative Common Stock sale. The derivative summary in the data is empty, indicating no option exercises, conversions, or other derivative transactions were included in this specific Form 4 filing.