Sec Form 4 Filing - Stevens Glenn Henry @ StoneX Group Inc. - 2021-12-15

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Stevens Glenn Henry 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) Head-Retail & Foreign Exchange (Last) (First) (Middle) 230 PARK AVENUE, 10TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 12/15/2021 (Street) NEW YORK, NY10169 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 Restricted Shares of Common Stock( 1 ) 12/15/2021 A 6,267 A $ 0 31,267 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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( 2 ) $ 62.04( 3 ) 12/15/2021 A 40,000 12/05/2022( 4 ) 12/05/2026 Common Stock 40,000 $ 62.04 40,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Stevens Glenn Henry 230 PARK AVENUE 10TH FLOOR NEW YORK, NY10169 Head-Retail & Foreign Exchange Signatures Glenn Henry Stevens 12/17/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares issued pursuant to the terms of the Company's Executive Performance Plan. Shares vest equally on anniversary in years one, two and three. ( 2 )The option grant was approved by the Company's Board of Directors on December 15, 2021. ( 3 )The strike price of the grant was set by the Company's Board of Directors as the closing price on December 14, 2021. ( 4 )The options vest in equal tranches on each of the first, second, third and fourth anniversaries of the Exercisable Date. The 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.

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).

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