Sean Michael Oconnor - 12 Oct 2026 Form 4 Insider Report for StoneX Group Inc. (SNEX)

Reporting relationship: Executive Vice-Chairman-Board, Director
Issuer ticker: SNEX
Reported as of: 12 Oct 2026
Net transaction value: -$4,595,852
SEC form: 4
Accepted by SEC: 13 Oct 2026, 19:06:46 UTC
Prior SEC filing: 23 Jul 2026
Source filing: View source filing
Reporting owner signature: Sean M. O'Connor

Filing notes and source

Key filing fact

Sean Michael Oconnor filed Form 4 for StoneX Group Inc. (SNEX) on 13 Oct 2026.

Key facts

This page summarizes Sean Michael Oconnor's Form 4 filing for StoneX Group Inc. (SNEX).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 13 Oct 2026, 19:06.

Change

Previous filing in this sequence was filed on 23 Jul 2026.
Current net transaction value: -$4,595,852.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001208362 Primary reporting owner

OCONNOR SEAN MICHAEL

Relationship: Executive Vice-Chairman-Board, Director
Address: 230 PARK AVENUE, 10TH FLOOR, NEW YORK
Signature: Sean M. O'Connor
Signature date: 13 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SNEX transaction

Common Stock

Options Exercise

Transaction value
Shares: +157,500
Change %: +9%
Price: $8.90^*
Shares after: 1,907,947
Date: 12 Oct 2026
Ownership: Direct

SNEX transaction

Common Stock

Sale

Transaction value: $4,595,852
Shares: -76,148
Change %: -4%
Price: $60.35
Shares after: 1,831,799
Date: 12 Oct 2026
Ownership: Direct
Footnotes: F1

SNEX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 636,529
Date: 12 Oct 2026
Ownership: By Trust

SNEX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,815,946
Date: 12 Oct 2026
Ownership: Darseaker Limited

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SNEX transaction Derivative

Stock Options

Options Exercise

Transaction value
Shares: -157,500
Change %: -9.4%
Price: $0.000000^*
Shares after: 1,518,750
Date: 12 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 157,500
Exercise price: $8.90

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 1 footnote

Footnote F1

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.