[Form 3] StoneX Group Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

StoneX Group Inc. (SNEX) reported an insider’s initial holdings. APAC Operations CEO Gregory Kallinikos filed a Form 3 for an event on 10/31/2025.

He beneficially owns 9,000 shares of common stock (direct). He also holds stock options covering 180,000 shares at an exercise price of $83.8, first exercisable on 12/05/2026 and expiring on 12/05/2031. The Board approved the grant on June 4, 2025, with vesting in equal tranches over five years.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Kallinikos Gregory

(Last) (First) (Middle)

230 PARK AVENUE

10TH FLOOR

(Street)

NEW YORK NY 10169

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
10/31/2025

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

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

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			APAC Operations CEO

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	9,000	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options(1)	12/05/2026(2)	12/05/2031	Common Stock	180,000	$83.8(3)	D

Explanation of Responses:

1. The option grant was approved by the Company's Board of Directors on June 4, 2025.

2. The options vest in equal tranches over a five year period. The initial Exercisable Date and Expiration Date were set by the Company's Board of Directors to coincide with the same dates as stock options previously granted to additional members of the Company's senior executive management team.

3. The strike price of the grant was set by the Company's Board of Directors as the closing price on the day of the grant, June 4, 2025.

Remarks:

	Gregory Kallinikos	10/31/2025
	** 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 5 (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.
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FAQ

What did SNEX disclose in this Form 3 filing?

APAC Operations CEO Gregory Kallinikos reported initial beneficial ownership, including 9,000 common shares and stock options for 180,000 shares at $83.8.

How many SNEX shares does Gregory Kallinikos own?

He beneficially owns 9,000 shares of StoneX Group Inc. common stock, held directly.

What are the terms of the SNEX stock options reported?

Options for 180,000 shares at $83.8, first exercisable on 12/05/2026 and expiring on 12/05/2031.

When were the SNEX options approved and how do they vest?

The Board approved the grant on June 4, 2025. They vest in equal tranches over five years.

What is the insider’s role at StoneX (SNEX)?

Gregory Kallinikos is APAC Operations CEO.

What is the Form 3 event date for this SNEX filing?

The stated event date is 10/31/2025.