Frederick Thiel files Rule 144 to sell 27,505 shares

Frederick Thiel reported proposed sales of 27,505 shares of common stock under Rule 144.

Rhea-AI Filing Summary

Frederick Thiel reported proposed sales of 27,505 shares of common stock under Rule 144. The filing lists the shares in connection with restricted stock vesting dated 01/31/2024 and shows brokerage details at Fidelity Brokerage Services LLC with a notice date of 05/18/2026.

The filing includes prior sales entries dated 03/17/2026 and 04/17/2026 showing dollar amounts in the record. The filing is a Rule 144 notice of proposed sale and reflects compensation‑related vested shares.

Insights

Securities Lawyer

Rule 144 notice records proposed sale of vested restricted shares by an affiliate.

The filing lists 27,505 shares tied to a restricted stock vesting event dated 01/31/2024. The document names Fidelity Brokerage Services LLC and provides a filing/notice date of 05/18/2026.

Timing and exact sale mechanics are not detailed here; subsequent brokerage reports or Form 4/Form 144 confirmations will show execution particulars and cash‑flow treatment.

Key Figures

Shares reported: 27,505 shares Vesting date: 01/31/2024 Filing/notice date: 05/18/2026 +3 more

6 metrics

Shares reported 27,505 shares listed for proposed sale in the Rule 144 notice

Vesting date 01/31/2024 Restricted Stock Vesting date tied to the reported shares

Filing/notice date 05/18/2026 date shown with brokerage details in the excerpt

Recorded amount (entry 1) $252,495.90 amount shown with sale entry dated 03/17/2026

Recorded amount (entry 2) $321,258.40 amount shown with sale entry dated 04/17/2026

Brokerage-listed amount $330,060.00 amount shown alongside Fidelity Brokerage and 27,505 shares

Key Terms

Rule 144, Restricted Stock Vesting, Compensation, Fidelity Brokerage Services LLC

4 terms

Rule 144 regulatory

"proposed sale of 27,505 shares under Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Restricted Stock Vesting | Issuer | 01/31/2024"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Compensation financial

"Compensation listed as purpose for the securities sold"

Fidelity Brokerage Services LLC other

"Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917"

FAQ

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

What did MARA insider Frederick Thiel disclose in this Rule 144 filing?

Frederick Thiel disclosed a proposed sale of 27,505 shares of common stock under Rule 144, tied to a restricted stock vesting dated 01/31/2024. The filing lists brokerage details at Fidelity and a notice date of 05/18/2026.

Does the filing state how much cash will be received for the MARA shares?

The filing records dollar figures associated with prior entries ($252,495.90 and $321,258.40) but does not present a single verified proceeds total for the proposed 27,505 shares sale in this excerpt.

Is the sale in the Rule 144 filing linked to compensation for MARA (symbol: MARA)?

Yes. The filing ties the securities to a Restricted Stock Vesting event dated 01/31/2024 and labels the transaction purpose as Compensation, indicating the shares became vested through compensation arrangements.

What dates should I note from the MARA Rule 144 filing?

Key dates in the excerpt include the vesting date 01/31/2024, prior reported sales dates 03/17/2026 and 04/17/2026, and the filing/notice date 05/18/2026 shown with brokerage details.

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

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Accepted by SEC EDGAR 05/18/2026 - 11:16 AM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001567383
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MARA Holdings, Inc.
SEC File Number	001-36555
Address of Issuer	1010 SOUTH FEDERAL HIGHWAY SUITE 2700 HALLANDALE BEACH FLORIDA 33009
Phone	(800) 804-1690
Name of Person for Whose Account the Securities are To Be Sold	Thiel Frederick G
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	27505	330060.00	381270503	05/18/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	01/31/2024	Restricted Stock Vesting	Issuer			27505	01/31/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Frederick Thiel 1010 South Federal Highway Suite 2700 Hallandale Beach FL 33009	Common	03/17/2026	27505	252495.90
Frederick Thiel 1010 South Federal Highway Suite 2700 Hallandale Beach FL 33009	Common	04/17/2026	27505	321258.40

144: Remarks and Signature

Remarks	Today's sale along with the sales on, 03/17/2026 and 04/17/2026, occurred in the account of the The Thiel Living Trust of which Frederick Thiel is a Trustee.
Date of Notice	05/18/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/28/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Louis Kurnick, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Frederick Thiel
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)