IBKR Interactive Brokers Group, Inc.
Interactive Brokers Group, Inc. (IBKR) 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.
How much of that selling was preplanned? 0% planned / 100% discretionary
Largest single sale: $7.7M.
Where they traded
Last open-market purchase: September 1, 2026 , by Conkling Lori A .
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| Conkling Lori A | Director | Buy | 25 | $94.53 | $2.4K | 2,559 | |
| Conkling Lori A | Director | Buy | 25 | $87.03 | $2.2K | 2,534 | |
| Conkling Lori A | Director | Buy | 25 | $88.03 | $2.2K | 2,509 | |
| Conkling Lori A | Director | Buy | 25 | $86.10 | $2.2K | 2,484 | |
| Conkling Lori A | Director | Buy | 25 | $79.64 | $2.0K | 2,459 | |
| Harris Lawrence E | Director | Sell | 26,000 | $76.93 | $2.0M | 173,482 −13% of holding | |
| Conkling Lori A | Director | Buy | 25 | $68.38 | $1.7K | 2,434 | |
| Conkling Lori A | Director | Buy | 25 | $69.21 | $1.7K | 2,409 | |
| Conkling Lori A | Director | Buy | 50 | $73.21 | $3.7K | 2,384 | |
| Nemser Earl H 2 fills | Vice Chairman | Sell | 60,200 | $75.30 | $4.5M | 20,469 −74.6% of holding | |
| Nemser Earl H 3 fills | Vice Chairman | Sell | 94,800 | $76.19 | $7.2M | 94,118 −50.2% of holding | |
| Nemser Earl H 2 fills | Vice Chairman | Sell | 145,000 | $77.85 | $11.3M | 215,065 −40.3% of holding | |
| Nemser Earl H | Vice Chairman | Sell | 100,000 | $76.81 | $7.7M | 300,000 −25% of holding | |
| Harris Lawrence E | Director | Sell | 10,645 | $69.00 | $734.5K | 198,704 −5.1% of holding | |
| Harris Lawrence E | Director | Sell | 6,855 | $69.15 | $474.0K | 209,349 −3.2% of holding | |
| Harris Lawrence E | Director | Sell | 7,500 | $69.73 | $523.0K | 216,204 −3.4% of holding | |
| Harris Lawrence E | Director | Sell | 8,000 | $68.50 | $548.0K | 223,704 −3.5% of holding | |
| Harris Lawrence E | Director | Sell | 22,000 | $67.63 | $1.5M | 231,704 −8.7% of holding | |
| Bright Jill | Director | Buy | 400 | $65.95 | $26.4K | 10,304 | |
| Brody Paul Jonathan 2 fills | Chief Financial Officer | Sell | 3,134 | $69.56 | $218.0K | 8,083 −27.9% of holding | |
| Brody Paul Jonathan 3 fills | Chief Financial Officer | Sell | 18,227 | $67.87 | $1.2M | 20,875 −46.6% of holding | |
| Brody Paul Jonathan 2 fills | Chief Financial Officer | Sell | 17,058 | $65.78 | $1.1M | 29,870 −36.3% of holding | |
| Brody Paul Jonathan 3 fills | Chief Financial Officer | Sell | 14,296 | $64.81 | $926.5K | 58,461 −19.6% of holding | |
| Brody Paul Jonathan 2 fills | Chief Financial Officer | Sell | 14,391 | $64.81 | $932.7K | 60,570 −19.2% of holding | |
| Brody Paul Jonathan 2 fills | Chief Financial Officer | Sell | 19,025 | $65.30 | $1.2M | 86,832 −18% of holding | |
| Brody Paul Jonathan 2 fills | Chief Financial Officer | Sell | 15,202 | $63.96 | $972.4K | 93,622 −14% of holding | |
| Brody Paul Jonathan 3 fills | Chief Financial Officer | Sell | 57,621 | $64.62 | $3.7M | 108,401 −34.7% of holding | |
| Brody Paul Jonathan 3 fills | Chief Financial Officer | Sell | 116,861 | $64.73 | $7.6M | 267,878 −30.4% of holding | |
| Brody Paul Jonathan 2 fills | Chief Financial Officer | Sell | 106,521 | $62.24 | $6.6M | 320,542 −24.9% of holding | |
| Brody Paul Jonathan 2 fills | Chief Financial Officer | Sell | 99,188 | $62.24 | $6.2M | 382,923 −20.6% of holding | |
| Brody Paul Jonathan 3 fills | Chief Financial Officer | Sell | 96,294 | $63.13 | $6.1M | 520,529 −15.6% 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.