StoneX (SNEX) CRO sells 34,862 shares, exercises 46,260 options

Rhea-AI Filing Summary

StoneX Group Inc. Chief Risk Officer Mark Lowry Maurer reported an option exercise paired with a stock sale. On May 14, 2026, he exercised stock options for 46,260 shares of common stock at an exercise price of $13.34 per share and sold 34,862 shares in an open-market sale at an average price of $116.2942 per share. Following these transactions, he directly owned 181,756 shares of StoneX common stock. The exercised options covered 46,260 underlying shares and were originally scheduled to expire on December 5, 2026, and the filing notes that the reported sale price is an average across multiple trades.

Insights

Equity compensation analyst

Executive exercised options, sold part of the shares, and increased his stock stake overall.

Chief Risk Officer Mark Lowry Maurer exercised stock options for 46,260 shares at an exercise price of $13.34 per share, then sold 34,862 shares of StoneX Group Inc. common stock in an open-market transaction at an average price of $116.2942.

The combined pattern is an exercise-and-partial-sale: more shares were acquired through the option exercise than were sold, so his direct holdings rose to 181,756 shares. The derivative section shows no remaining options from this grant, indicating a full exercise of that specific option award before its December 5, 2026 expiration.

The filing does not reference a Rule 10b5-1 trading plan, so timing context is limited to the reported May 14, 2026 transaction date. Investors often note that such transactions both realize value from options and leave the executive with a continued equity position tied to future company performance.

Insider Trade Summary 10b5-1

Net Seller: 34,862 shares ($4,054,248)

Net Sell 3 txns

Insider Maurer Mark Lowry

Role null

Sold 34,862 shs ($4.05M)

Type	Security	Shares	Price	Value
Exercise	Stock Options	46,260	$0.00	--
Exercise	Common Stock	46,260	$13.34	$617K
Sale	Common Stock	34,862	$116.2942	$4.05M

Holdings After Transaction: Stock Options — 568,740 shares (Direct, null); Common Stock — 181,756 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 34,862 shares Average sale price: $116.2942 per share Options exercised: 46,260 shares +3 more

6 metrics

Shares sold 34,862 shares Open-market sale of StoneX common stock on May 14, 2026

Average sale price $116.2942 per share Average price for 34,862 StoneX shares sold

Options exercised 46,260 shares Stock options converted into StoneX common shares

Option exercise price $13.34 per share Exercise price of stock options for 46,260 shares

Shares owned after transactions 181,756 shares Direct StoneX common stock holdings post-transaction

Option expiration date December 5, 2026 Original expiration date of exercised stock options

Key Terms

open-market sale, Stock Options, derivative security, exercise price, +1 more

5 terms

open-market sale financial

"sold 34,862 shares in an open-market sale at an average price"

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.

Stock Options financial

"The exercised options covered 46,260 underlying shares and were originally scheduled"

Stock options are agreements that give a person the right to buy or sell a company's stock at a specific price within a certain time frame. They are often used as a reward or incentive, similar to a coupon that can be used later if the stock price rises, allowing the holder to make a profit.

derivative security financial

"transaction_code_description" : "Exercise or conversion of derivative security""

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

exercise price financial

"exercised stock options for 46,260 shares of common stock at an exercise price of $13.34"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

Form 4 regulatory

"according to the Form 4 filing"

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.

Form 4 Insider Transactions: What Each Field Means →

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^*

Maurer Mark Lowry

(Last) (First) (Middle)

230 SOUTH LASALLE

SUITE 10-500

(Street)

CHICAGO ILLINOIS 60604

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
StoneX Group Inc. [ SNEX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			Chief Risk Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

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	05/14/2026		M		46,260	A	$13.34	181,756	D
Common Stock	05/14/2026		S		34,862	D	$116.2942(1)	146,894	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
Stock Options	$13.34	05/14/2026		M			46,260	12/05/2021	12/05/2026	Common Stock	46,260	$0	568,740	D

Explanation of Responses:

1. The price reported represents an average price. The Reporting Person will provide to the Commission, the issuer and any stockholder, upon request, full information regarding the number of shares sold at each separate price.

Remarks:

	Mark L. Maurer	05/15/2026
	** 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 transactions did StoneX Group (SNEX) report for Mark Lowry Maurer?

Mark Lowry Maurer exercised stock options and sold common shares. He exercised 46,260 options at $13.34 per share and sold 34,862 StoneX common shares in an open-market transaction on May 14, 2026, according to the Form 4 filing.

How many StoneX (SNEX) shares did Mark Lowry Maurer sell and at what price?

He sold 34,862 shares of StoneX common stock. The reported sale price is an average of $116.2942 per share, with the filing noting this is an average across multiple trades and that detailed price breakdowns are available upon request.

What stock options did Mark Lowry Maurer exercise in the StoneX (SNEX) Form 4?

He exercised stock options covering 46,260 underlying StoneX common shares. The options had an exercise price of $13.34 per share and an original expiration date of December 5, 2026, and were fully exercised in the reported transaction.

How many StoneX (SNEX) shares does Mark Lowry Maurer own after these transactions?

After the reported option exercise and share sale, Mark Lowry Maurer directly owns 181,756 shares of StoneX Group Inc. common stock, as stated in the Form 4. This reflects his updated equity stake following the May 14, 2026 activity.

Was the StoneX (SNEX) insider sale by Mark Lowry Maurer an open-market transaction?

Yes. The Form 4 identifies the 34,862-share disposition as an open-market sale of StoneX common stock. The transaction code is “S,” described as a sale in an open market or private transaction, with an average sale price of $116.2942 per share.

Did Mark Lowry Maurer retain StoneX (SNEX) shares after exercising options and selling stock?

He retained a significant stake after the transactions. Although he sold 34,862 shares, he acquired 46,260 shares through the option exercise and ended with 181,756 StoneX common shares held directly, showing a net increase in his common stock holdings.