SNEX StoneX Group Inc.

NASDAQ
$70.37

StoneX Group Inc. (SNEX) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with SNEX's own trailing one-year pace, with 3% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 1 buyer in the last 90 days 8 sellers in the last 90 days
Insiders buying
2
2 transactions
Insiders selling
12
51 transactions
Purchases
$258.5K
3,500 shares
Sales
$158.5M
1,536,205 shares
Net activity
-$158.3M
purchases less sales

How much of that selling was preplanned? 3% planned / 97% discretionary

10b5-1 plan sales $4.7M 1 transaction · 34,706 shares
Discretionary sales $153.8M 50 transactions · 1,501,499 shares

Largest single sale: $15.5M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: August 10, 2026 , by Thamodaran Dhamu R. .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Dunaway William J Chief Financial Officer Sell 96,490 $66.35 $6.4M 502,203 −16.1% of holding
Perkins Abigail H Chief Information Officer Sell 4,500 $64.81 $291.7K 96,663 −4.4% of holding
Thamodaran Dhamu R. Director Buy 2,500 $64.48 $161.2K 75,760
Maurer Mark Lowry Other Sell 52,648 $66.25 $3.5M 236,964 −18.2% of holding
FOWLER JOHN MOORE Director Sell 1,575 $75.41 $118.8K 255,271 −0.6% of holding
Rotsztain Diego Chief Governance/Legal Officer Sell 20,630 $74.40 $1.5M 34,870 −37.2% of holding
OCONNOR SEAN MICHAEL Executive Vice-Chairman-Board Sell 104,934 $74.33 $7.8M 1,750,447 −5.7% of holding
Dunaway William J Chief Financial Officer Sell 95,970 $74.33 $7.1M 472,131 −16.9% of holding
Maurer Mark Lowry Other Sell 52,376 $74.32 $3.9M 220,240 −19.2% of holding
Smith Philip Andrew Chief Executive Officer Sell 45,000 $74.32 $3.3M 738,216 −5.7% of holding
Rotsztain Diego Chief Governance/Legal Officer Sell 29,995 $74.32 $2.2M 55,500 −35.1% of holding
Perkins Abigail H Chief Information Officer Sell 8,919 $70.43 $628.1K 96,663 −8.4% of holding
BEXIGA ANNABELLE G Director Sell 1,500 $113.92 $170.9K 18,688 −7.4% of holding
Smith Philip Andrew 2 fills Chief Executive Officer Sell 51,540 $118.72 $6.1M 492,144 −9.5% of holding
Maurer Mark Lowry Other Sell 11,542 $133.63 $1.5M 135,496 −7.8% of holding
OCONNOR SEAN MICHAEL Executive Vice-Chairman-Board Sell 75,000 $135.42 $10.2M 1,086,921 −6.5% of holding
Maurer Mark Lowry Other Sell 10b5-1 34,706 $135.31 $4.7M 147,038 −19.1% of holding
BEXIGA ANNABELLE G Director Sell 1,500 $133.36 $200.0K 20,188 −6.9% of holding
OCONNOR SEAN MICHAEL Executive Vice-Chairman-Board Sell 75,000 $131.15 $9.8M 1,161,921 −6.1% of holding
Dunaway William J Chief Financial Officer Sell 63,602 $131.16 $8.3M 294,359 −17.8% of holding
Lyon Charles M President Sell 9,000 $131.96 $1.2M 216,495 −4% of holding
Perkins Abigail H Chief Information Officer Sell 4,312 $118.51 $511.0K 72,388 −5.6% of holding
Maurer Mark Lowry Other Sell 11,398 $112.25 $1.3M 135,496 −7.8% of holding
Smith Philip Andrew Chief Executive Officer Sell 8,535 $112.72 $962.1K 506,184 −1.7% of holding
Rotsztain Diego 2 fills Chief Governance/Legal Officer Sell 27,392 $112.79 $3.1M 23,247 −54.1% of holding
OCONNOR SEAN MICHAEL Executive Vice-Chairman-Board Sell 72,140 $109.94 $7.9M 1,236,921 −5.5% of holding
OCONNOR SEAN MICHAEL Executive Vice-Chairman-Board Sell 87,790 $111.46 $9.8M 1,236,921 −6.6% of holding
Rotsztain Diego 2 fills Chief Governance/Legal Officer Sell 40,108 $111.48 $4.5M 36,943 −52.1% of holding
OCONNOR SEAN MICHAEL Executive Vice-Chairman-Board Sell 140,070 $110.31 $15.5M 1,236,921 −10.2% of holding
Dunaway William J Chief Financial Officer Sell 64,017 $110.46 $7.1M 273,586 −19% of holding
BEXIGA ANNABELLE G Director Sell 1,500 $112.82 $169.2K 21,688 −6.5% of holding
Maurer Mark Lowry Other Sell 34,862 $116.29 $4.1M 146,894 −19.2% of holding
Schroeder Aaron Chief Accounting Officer Sell 3,500 $122.65 $429.3K 51,481 −6.4% of holding
PARTHEMORE ERIC Director Sell 2,500 $123.30 $308.2K 43,874 −5.4% of holding
KASS STEVEN A Director Sell 2,000 $123.26 $246.5K 53,266 −3.6% of holding
FOWLER JOHN MOORE Director Sell 1,050 $106.25 $111.6K 171,246 −0.6% of holding
BEXIGA ANNABELLE G Director Sell 1,500 $101.91 $152.9K 23,188 −6.1% of holding
Smith Philip Andrew Chief Executive Officer Sell 30,000 $92.23 $2.8M 514,719 −5.5% of holding
BEXIGA ANNABELLE G Director Sell 1,000 $106.54 $106.5K 16,459 −5.7% of holding
Perkins Abigail H Chief Information Officer Sell 8,000 $126.72 $1.0M 48,259 −14.2% of holding
OCONNOR SEAN MICHAEL Executive Vice-Chairman-Board Sell 40,000 $124.56 $5.0M 854,127 −4.5% of holding
OCONNOR SEAN MICHAEL Executive Vice-Chairman-Board Sell 40,000 $124.95 $5.0M 854,127 −4.5% of holding
Maurer Mark Lowry Other Sell 40,000 $124.88 $5.0M 90,331 −30.7% of holding
Lyon Charles M President Sell 30,000 $124.78 $3.7M 150,330 −16.6% of holding
FOWLER JOHN MOORE Director Sell 1,125 $112.70 $126.8K 113,765 −1% of holding
Rotsztain Diego Chief Governance/Legal Officer Sell 2,029 $94.50 $191.7K 15,498 −11.6% of holding
Rotsztain Diego Chief Governance/Legal Officer Sell 2,477 $94.91 $235.1K 17,527 −12.4% of holding
Rotsztain Diego Chief Governance/Legal Officer Sell 1,348 $96.17 $129.6K 20,004 −6.3% of holding
RADZIWILL JOHN Chairman of the Board Buy 1,000 $97.25 $97.3K 101,596
FOWLER JOHN MOORE Director Sell 1,125 $91.20 $102.6K 114,769 −1% of holding

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.