StoneX officer plans 50,528-share sale in 2026

Officer Mark Maurer has filed a Rule 144 notice to sell 50,528 SNEX common shares, disclosing recent stock plan acquisitions and prior sales.

Rhea-AI Filing Summary

StoneX Group Inc. (SNEX) received a Rule 144 notice from officer Mark Maurer, indicating a proposed sale of 50,528 shares of common stock through Merrill Lynch on or after September 15, 2026, on NASDAQ, with an aggregate market value of 3,385,042.

The notice lists prior acquisitions from issuer stock plan activity and recent open-market sales by Maurer over the past three months, providing context for compliance with Rule 144 volume and information requirements.

Key Figures

Shares to be sold under Rule 144: 50,528 shares Aggregate market value of proposed sale: 3,385,042 Shares outstanding: 120,616,735 shares +3 more

6 metrics

Shares to be sold under Rule 144 50,528 shares Common stock proposed sale by Mark Maurer through Merrill Lynch

Aggregate market value of proposed sale 3,385,042 Value of 50,528 common shares covered by the notice

Shares outstanding 120,616,735 shares Common shares outstanding for StoneX Group Inc.

Recent sale on September 14, 2026 52,564 shares for 3,616,214 Common shares sold by Mark Maurer in the past three months

Recent sale on August 7, 2026 52,648 shares for 3,486,284 Common shares sold by Mark Maurer in the past three months

Stock plan activity on July 22, 2026 16,996 shares Issuer stock plan activity in common shares for Mark Maurer

Key Terms

Rule 144, aggregate market value, stock plan activity, common stock

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of 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.

aggregate market value financial

"Common | Merrill Lynch ... | 50528 | 3385042 | 120616735 | 09/15/2026"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

stock plan activity financial

"Common | 07/22/2026 | Stock Plan Activity | Issuer"

common stock financial

"Common | Merrill Lynch 1800 K ST NW Suite 800"

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.

FAQ

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

What does the Form 144 filing disclose about StoneX Group Inc. (SNEX)?

The filing discloses that officer Mark Maurer intends to sell 50,528 shares of StoneX Group Inc. common stock under Rule 144 through Merrill Lynch, with an aggregate market value of 3,385,042, to be sold on or after September 15, 2026 on NASDAQ.

How many SNEX shares is Mark Maurer proposing to sell under Rule 144?

Mark Maurer is proposing to sell 50,528 shares of StoneX Group Inc. common stock. The filing lists an aggregate market value of 3,385,042 for these shares and indicates the sales are expected to occur on or after September 15, 2026 on NASDAQ.

What is the aggregate market value of the SNEX shares covered by this Form 144?

The aggregate market value of the 50,528 StoneX Group Inc. common shares covered by this Form 144 is reported as 3,385,042. This value is tied to the shares proposed to be sold through Merrill Lynch on or after September 15, 2026.

How many StoneX (SNEX) shares are outstanding according to the filing?

The filing reports that 120,616,735 shares of StoneX Group Inc. common stock are outstanding, in the context of the Rule 144 notice describing the proposed sale of 50,528 shares.

What recent SNEX stock plan activity is disclosed for Mark Maurer?

The filing lists issuer stock plan activity in common shares for Mark Maurer of 16,996 shares on July 22, 2026, 16,724 shares on August 7, 2026, and 16,808 shares on September 14, 2026, all categorized as stock plan activity from the issuer.

What SNEX share sales has Mark Maurer made in the past three months?

The filing reports recent sales of StoneX common stock by Mark Maurer, including 52,564 shares on September 14, 2026 for 3,616,214, 52,648 shares on August 7, 2026 for 3,486,284, 52,376 shares on July 22, 2026 for 3,891,026, 11,542 shares on June 16, 2026 for 1,541,954, and 34,706 shares on June 15, 2026 for 4,694,738.

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

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Available on EDGAR 09/15/2026 - 04:47 PM Accepted by SEC EDGAR 09/15/2026 - 04:47 PM 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	0001662210
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	StoneX Group Inc.
SEC File Number
Address of Issuer	230 Park Ave 10th Floor New York NEW YORK 10169
Phone	2124853500
Name of Person for Whose Account the Securities are To Be Sold	Mark Maurer
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

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	Merrill Lynch 1800 K ST NW Suite 800 Washington DC 20006	50528	3385042	120616735	09/15/2026	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	07/22/2026	Stock Plan Activity	Issuer			16996	07/22/2026	n/a
Common	08/07/2026	Stock Plan Activity	Issuer			16724	08/07/2026	n/a
Common	09/14/2026	Stock Plan Activity	Issuer			16808	09/14/2026	n/a

* 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
Mark Maurer 230 Park Ave 10th Floor New York NY 10169	Common	09/14/2026	52564	3616214
Mark Maurer 230 Park Ave 10th Floor New York NY 10169	Common	08/07/2026	52648	3486284
Mark Maurer 230 Park Ave 10th Floor New York NY 10169	Common	07/22/2026	52376	3891026
Mark Maurer 230 Park Ave 10th Floor New York NY 10169	Common	06/16/2026	11542	1541954
Mark Maurer 230 Park Ave 10th Floor New York NY 10169	Common	06/15/2026	34706	4694738

144: Remarks and Signature

Remarks
Date of Notice	09/15/2026
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	Mark Maurer
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)