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

1. Name and Address of Reporting Person *

OCONNOR SEAN MICHAEL		 2. Issuer Name and Ticker or Trading Symbol

StoneX Group Inc. [ SNEX ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
CEO/President
(Last)          (First)          (Middle)

230 PARK AVENUE, 10TH FLOOR		 3. Date of Earliest Transaction (MM/DD/YYYY)

9/9/2021
(Street)

NEW YORK, NY 10169
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

9/9/2021 
 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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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 9/9/2021  M  13807 (1)A$25.91 348520 D  
Common Stock 9/9/2021  S  10000 D$68 338520 (2)D  
Common Stock 9/10/2021  M  1848 (1)A$25.91 340368 D  
Common Stock 9/10/2021  S  1325 D$68 339043 (2)D  
Common Stock         61290 I By Trust 
Common Stock         780434 I Darseaker Limited 

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)		2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date7. 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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options $25.91 9/9/2021  M     13807 (1) 12/16/2016 12/16/2021 Common 13807.0 (1)$0 278114 D  
Stock Options $25.91 9/10/2021  M     1848 (1) 12/16/2016 12/16/2021 Common 1848.0 (1)$0 276266 D  
Explanation of Responses:
(1) Amendment filed to correct the number of options exercised.
(2) Amendment filed to correct the number of shares beneficially owned following correction to the number of options exercised.
Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
OCONNOR SEAN MICHAEL
230 PARK AVENUE
10TH FLOOR
NEW YORK, NY 10169		X
CEO/President
Signatures
Sean M. O'Connor9/16/2021
**Signature of Reporting PersonDate
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