Comparable stake leader
BlackRock, Inc.
SEC ownership of StoneX Group Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000913760.
Disclosed value leader
BlackRock, Inc.
Comparable rows
3/50
Latest evidence
30 Oct 2026
- Public ticker
- SNEX on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
3 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Oct 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000913760
- Issuer location
- New York, NY
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of StoneX Group Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
3/50
Latest evidence
30 Oct 2026
13F
13D/G
3/4/5
Lead comparable stake: 13%
47 rows are not safely comparable across share classes.
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 13%.
3 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 3
BlackRock, Inc.
13%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.1%
PRICE T ROWE ASSOCIATES INC /MD/
4.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
13%
Reported 13D/G
· 30 Sep 2025
|
$1,343,877,023
11,340,734 shares
|
— | 30 Jun 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.1%
Reported 13D/G
· 30 Jun 2026
|
$504,289,130
4,075,393 shares
|
$0 | 30 Jun 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
13D/G
Company · T. Rowe Price Associates, Inc.
|
4.4%
Reported 13D/G
· 31 Mar 2026
|
$369,503,000
3,118,162 shares
|
— | 30 Jun 2026 |
| Sean Michael Oconnor |
3/4/5
Executive Vice-Chairman-Board, Director
|
—
mixed-class rows
|
$398,365,192
8,860,191 shares
mixed-class rows
|
-$75,535,840 | 12 Oct 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$379,661,558
3,203,895 shares
|
— | 30 Jun 2026 |
| AMERICAN CENTURY COMPANIES INC |
13F
Company
|
—
denominator unverified
|
$351,075,684
2,962,664 shares
|
— | 30 Jun 2026 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$343,807,674
2,901,690 shares
|
— | 30 Jun 2026 |
| T. Rowe Price Investment Management, Inc. |
13F
Company
|
—
denominator unverified
|
$277,322,000
2,340,262 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$179,709,683.
Buys
$258,456
Insiders: 2
Sells
$179,968,139
Insiders: 12
Net
-$179,709,683
Shares: -1,892,397
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 3,500
Shares: 1,895,897
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 491,057 | $0 | $31,724,028 | -$31,724,028 |
| 3-6 | 2,500 | 1,198,311 | $161,206 | $123,706,461 | -$123,545,255 |
| 6-9 | 0 | 49,550 | $0 | $5,135,641 | -$5,135,641 |
| 9-12 | 1,000 | 156,979 | $97,250 | $19,402,009 | -$19,304,759 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 23 reporting-owner rows connected to StoneX Group Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
23
Largest Forms 3/4/5 holder
Sean Michael Oconnor
Net 12M change
-$179.71M
Full value: -$179,709,684 · USD · 12-month changeLatest report
05 Nov 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Sean Michael Oconnor | Executive Vice-Chairman-Board, Director | $398,365,192 | -$75,535,840 | -16% | Mixed | 12 Oct 2026 |
| John Radziwill | Chairman of the Board, Director | $138,918,147 | +$97,250 | +0.07% | Median | 30 Oct 2026 |
| Philip Andrew Smith | Chief Executive Officer, Director | $104,469,015 | -$19,564,931 | -16% | Mixed | 15 Oct 2026 |
| Scott J. Branch | Retired Director | $73,060,642 | Mixed | 13 Mar 2024 | ||
| Charles M. Lyon | President | $38,422,677 | -$4,930,911 | -11% | Mixed | 10 Sep 2026 |
| William J. Dunaway | Chief Financial Officer | $33,319,562 | -$28,948,350 | -46% | Filing P/S | 14 Aug 2026 |
| Stuart Davison | Chief Operating Officer | $17,334,342 | Mixed | 15 Dec 2025 | ||
| John M. Fowler | Director | $14,871,859 | -$446,691 | -2.9% | Mixed | 05 Nov 2026 |
| Mark L. Maurer | Chief Risk Officer | $13,256,398 | -$34,147,922 | -72% | Filing P/S | 12 Oct 2026 |
| Anthony J. DiCiollo | Head of Institutional Segment | $10,522,633 | Median | 30 Oct 2026 | ||
| Xuong Nguyen | Retired Officer | $10,216,530 | Mixed | 15 Jul 2024 | ||
| Glenn Henry Stevens | Retired Officer | $9,185,695 | Filing P/S | 18 Feb 2025 | ||
| Steven A. Kass | Director | $6,565,535 | -$246,519 | -3.6% | Filing P/S | 30 Oct 2026 |
| Aaron M. Schroeder | Chief Accounting Officer | $6,314,093 | -$429,272 | -6.4% | Filing P/S | 11 May 2026 |
| Abigail H. Perkins | Chief Information Officer | $6,128,577 | -$3,058,782 | -33% | Mixed | 14 Sep 2026 |
| Dhamu R. Thamodaran | Director | $5,566,414 | +$161,206 | +3% | Mixed | 30 Oct 2026 |
| Eric Parthemore | Director | $5,409,642 | -$308,249 | -5.4% | Filing P/S | 11 May 2026 |
| Diego Rotsztain | Chief Governance/Legal Officer | $2,340,802 | -$11,551,118 | -83% | Filing P/S | 14 Sep 2026 |
| Annabelle G. Bexiga | Director | $2,128,936 | -$799,555 | -27% | Filing P/S | 15 Jul 2026 |
| Gregory Kallinikos | APAC Operations CEO | $908,280 | Mixed | 31 Oct 2025 |
Recent insider transactions for StoneX Group Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| John M. Fowler | SNEX | Common Stock | Sale | -0.62% | -$89,570 | $56.87 | -1,575 | 253,834 | 05 Nov 2026 | Direct |
| John M. Fowler | SNEX | Common Stock | Tax liability | -0.04% | -108 | 255,409 | 31 Oct 2026 | Direct | ||
| John M. Fowler | SNEX | Restricted Shares of Common Stock | Award | 0.1% | 246 | 255,517 | 30 Oct 2026 | Direct | ||
| Anthony J. DiCiollo | SNEX | Restricted Shares of Common Stock | Award | 4.06% | 6,604 | 169,390 | 30 Oct 2026 | Direct | ||
| Steven A. Kass | SNEX | Restricted Shares of Common Stock | Award | 0.31% | 246 | 80,319 | 30 Oct 2026 | Direct | ||
| John Radziwill | SNEX | Restricted Shares of Common Stock | Award | 0.13% | 310 | 232,160 | 30 Oct 2026 | Direct | ||
| Dhamu R. Thamodaran | SNEX | Restricted Shares of Common Stock | Award | 3.56% | 201 | 5,849 | 30 Oct 2026 | Direct | ||
| Diane L. Cooper | SNEX | Restricted Shares of Common Stock | Award | 0.29% | 164 | 56,266 | 30 Oct 2026 | Direct | ||
| Philip Andrew Smith | SNEX | Common Stock | Sale | -5.75% | -$2,677,486 | $59.50 | -45,000 | 738,216 | 15 Oct 2026 | Direct |
| Philip Andrew Smith | SNEX | Common Stock | Options Exercise | 6.1% | 45,000 | 783,216 | 15 Oct 2026 | Direct | ||
| Philip Andrew Smith | SNEX | Stock Options | Options Exercise | -5.23% | -45,000 | 815,625 | 15 Oct 2026 | Direct | ||
| Mark L. Maurer | SNEX | Common Stock | Sale | -19.4% | -$3,195,650 | $60.35 | -52,953 | 219,663 | 12 Oct 2026 | Direct |
| Mark L. Maurer | SNEX | Common Stock | Options Exercise | 34.1% | 69,372 | 272,616 | 12 Oct 2026 | Direct | ||
| Mark L. Maurer | SNEX | Stock Options | Options Exercise | -12% | -69,372 | 506,250 | 12 Oct 2026 | Direct | ||
| Sean Michael Oconnor | SNEX | Common Stock | Sale | -3.99% | -$4,595,852 | $60.35 | -76,148 | 1,831,799 | 12 Oct 2026 | Direct |
| Sean Michael Oconnor | SNEX | Common Stock | Options Exercise | 9% | 157,500 | 1,907,947 | 12 Oct 2026 | Direct | ||
| Sean Michael Oconnor | SNEX | Stock Options | Options Exercise | -9.4% | -157,500 | 1,518,750 | 12 Oct 2026 | Direct | ||
| Philip Andrew Smith | SNEX | Common Stock | Sale | -7.08% | -$3,694,888 | $65.69 | -56,250 | 738,216 | 28 Sep 2026 | Direct |
| Philip Andrew Smith | SNEX | Common Stock | Options Exercise | 7.62% | 56,250 | 794,466 | 28 Sep 2026 | Direct | ||
| Philip Andrew Smith | SNEX | Stock Options | Options Exercise | -6.13% | -56,250 | 860,625 | 28 Sep 2026 | Direct | ||
| Diego Rotsztain | SNEX | Common Stock | Sale | -36.8% | -$1,362,593 | $67.13 | -20,298 | 34,870 | 16 Sep 2026 | Direct |
| Mark L. Maurer | SNEX | Common Stock | Sale | -19.9% | -$3,386,629 | $67.02 | -50,528 | 203,244 | 15 Sep 2026 | Direct |
| Diego Rotsztain | SNEX | Common Stock | Sale | -35.5% | -$2,087,474 | $68.83 | -30,327 | 55,168 | 14 Sep 2026 | Direct |
| Diego Rotsztain | SNEX | Common Stock | Options Exercise | 145.2% | 50,625 | 85,495 | 14 Sep 2026 | Direct | ||
| Diego Rotsztain | SNEX | Stock Options | Options Exercise | -9.09% | -50,625 | 506,250 | 14 Sep 2026 | Direct | ||
| Abigail H. Perkins | SNEX | Common Stock | Sale | -9.23% | -$614,218 | $68.83 | -8,924 | 87,739 | 14 Sep 2026 | Direct |
| Mark L. Maurer | SNEX | Common Stock | Sale | -17.2% | -$3,617,864 | $68.83 | -52,564 | 253,772 | 14 Sep 2026 | Direct |
| Mark L. Maurer | SNEX | Common Stock | Options Exercise | 29.3% | 69,372 | 306,336 | 14 Sep 2026 | Direct | ||
| Mark L. Maurer | SNEX | Stock Options | Options Exercise | -10.8% | -69,372 | 575,622 | 14 Sep 2026 | Direct | ||
| Charles M. Lyon | SNEX | Common Stock | Gift | -0.15% | -500 | 324,242 | 10 Sep 2026 | Direct | ||
| William J. Dunaway | SNEX | Common Stock | Sale | -16.1% | -$6,401,803 | $66.35 | -96,490 | 502,203 | 14 Aug 2026 | Direct |
| William J. Dunaway | SNEX | Common Stock | Options Exercise | 26.8% | 126,562 | 598,693 | 14 Aug 2026 | Direct | ||
| William J. Dunaway | SNEX | Stock Options | Options Exercise | -20% | -126,562 | 506,250 | 14 Aug 2026 | Direct | ||
| Abigail H. Perkins | SNEX | Common Stock | Sale | -4.45% | -$291,662 | $64.81 | -4,500 | 96,663 | 10 Aug 2026 | Direct |
| Abigail H. Perkins | SNEX | Common Stock | Options Exercise | 4.66% | 4,500 | 101,163 | 10 Aug 2026 | Direct | ||
| Abigail H. Perkins | SNEX | Stock Options | Options Exercise | -0.87% | -4,500 | 515,250 | 10 Aug 2026 | Direct | ||
| Dhamu R. Thamodaran | SNEX | Common Stock | Purchase | 3.41% | $161,206 | $64.48 | 2,500 | 75,760 | 10 Aug 2026 | By Trust |
| Mark L. Maurer | SNEX | Common Stock | Sale | -18.2% | -$3,487,935 | $66.25 | -52,648 | 236,964 | 07 Aug 2026 | Direct |
| Mark L. Maurer | SNEX | Common Stock | Options Exercise | 31.5% | 69,372 | 289,612 | 07 Aug 2026 | Direct | ||
| Mark L. Maurer | SNEX | Stock Options | Options Exercise | -9.71% | -69,372 | 644,994 | 07 Aug 2026 | Direct | ||
| John M. Fowler | SNEX | Common Stock | Sale | -0.61% | -$118,771 | $75.41 | -1,575 | 255,271 | 05 Aug 2026 | Direct |
| John M. Fowler | SNEX | Common Stock | Tax liability | -0.08% | -197 | 256,846 | 31 Jul 2026 | Direct | ||
| John M. Fowler | SNEX | Restricted Shares of Common Stock | Award | 0.07% | 174 | 257,043 | 31 Jul 2026 | Direct | ||
| Diane L. Cooper | SNEX | Restricted Shares of Common Stock | Award | 0.21% | 116 | 56,102 | 31 Jul 2026 | Direct | ||
| John Radziwill | SNEX | Restricted Shares of Common Stock | Award | 0.09% | 219 | 231,850 | 31 Jul 2026 | Direct | ||
| Dhamu R. Thamodaran | SNEX | Restricted Shares of Common Stock | Award | 2.58% | 142 | 5,648 | 31 Jul 2026 | Direct | ||
| Steven A. Kass | SNEX | Restricted Shares of Common Stock | Award | 0.22% | 174 | 80,073 | 31 Jul 2026 | Direct | ||
| Diego Rotsztain | SNEX | Common Stock | Sale | -37.2% | -$1,534,886 | $74.40 | -20,630 | 34,870 | 24 Jul 2026 | Direct |
| Diego Rotsztain | SNEX | Common Stock | Sale | -35.1% | -$2,229,282 | $74.32 | -29,995 | 55,500 | 22 Jul 2026 | Direct |
| Diego Rotsztain | SNEX | Common Stock | Options Exercise | 145.2% | 50,625 | 85,495 | 22 Jul 2026 | Direct |
* marks a reported price that did not pass the local price check.