| Insiders | Shares | % | Avg Price | Total $ | |
|---|---|---|---|---|---|
| Buys | 1 | +400 | 0.02% | $65.95 | +$26,380 |
| Sells | 3 | -1,789,105 | 100% | $67.12 | -$120,079,247 |
| Net | -2 | -1,788,705 | -100% | -$120,052,867 |
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Report Date |
|---|---|---|---|---|---|
| Thomas Peterffy | Chairman, Director | $332,817,111 | 20 Feb 2025 | ||
| Milan Galik | Chief Executive Officer, Director | $223,183,224 | 01 Jan 2026 | ||
| Paul J. Brody | Chief Financial Officer, Director | $189,053,779 | -$59,126,297 | -24% | 01 Jan 2026 |
| Earl H. Nemser | Vice Chairman, Director | $29,057,187 | -$57,185,586 | -66% | 26 Jan 2026 |
| Thomas Aj Frank | Executive Vice President | $18,215,622 | 31 Dec 2025 | ||
| Lawrence E. Harris | Director | $12,828,687 | -$3,767,363 | -23% | 01 Jan 2026 |
| Denis Mendonca | Chief Accounting Officer | $10,046,991 | 31 Dec 2025 | ||
| Jill Bright | Director | $712,683 | +$26,380 | +3.8% | 01 Jan 2026 |
| Nicole Yuen | Director | $651,203 | 01 Jan 2026 | ||
| William Peterffy | Director | $651,203 | 01 Jan 2026 | ||
| Philip Uhde | Director | $237,293 | 31 Dec 2023 | ||
| John M. Damgard | Director | $201,865 | 31 Dec 2021 | ||
| Richard H. Repetto | Director | $195,888 | 01 Jan 2026 | ||
| Gary Katz | Director | $177,877 | 31 Dec 2022 | ||
| Lori A. Conkling | Director | $150,099 | 31 Dec 2025 |
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Earl H. Nemser | IBKR | Class A common stock | Sale | -100% | $4,533,133 | $75.30 | -60,200 | 0 | 27 Jan 2026 | by EN Holdings LLC |
| Earl H. Nemser | IBKR | Class A common stock | Sale | -61.2% | $7,222,778 | $76.19 | -94,800 | 60,200 | 26 Jan 2026 | by EN Holdings LLC |
| Earl H. Nemser | IBKR | Class A common stock | Sale | -48.3% | $11,288,682 | $77.85 | -145,000 | 155,000 | 23 Jan 2026 | by EN Holdings LLC |
| Earl H. Nemser | IBKR | Class A common stock | Sale | -25% | $7,681,000 | $76.81 | -100,000 | 300,000 | 22 Jan 2026 | by EN Holdings LLC |
| William Peterffy | IBKR | Class A common stock | Award | 4% | 389 | 10,126 | 01 Jan 2026 | Direct | ||
| Earl H. Nemser | IBKR | Class A common stock | Award | 0.09% | 389 | 451,830 | 01 Jan 2026 | Direct | ||
| Paul J. Brody | IBKR | Class A common stock | Award | 0.01% | 389 | 2,939,726 | 01 Jan 2026 | Direct | ||
| Milan Galik | IBKR | Class A common stock | Award | 0.01% | 389 | 3,470,428 | 01 Jan 2026 | Direct | ||
| Lawrence E. Harris | IBKR | Class A common stock | Award | 0.2% | 389 | 199,482 | 01 Jan 2026 | Direct | ||
| Lori A. Conkling | IBKR | Class A common stock | Award | 20% | 389 | 2,334 | 01 Jan 2026 | Direct | ||
| Jill Bright | IBKR | Class A common stock | Award | 3.64% | 389 | 11,082 | 01 Jan 2026 | Direct | ||
| Nicole Yuen | IBKR | Class A common stock | Award | 4% | 389 | 10,126 | 01 Jan 2026 | Direct | ||
| Richard H. Repetto | IBKR | Class A common stock | Award | 14.6% | 389 | 3,046 | 01 Jan 2026 | Direct | ||
| Lori A. Conkling | IBKR | Class A common stock | Award | 25% | 389 | 1,945 | 31 Dec 2025 | Direct | ||
| Paul J. Brody | IBKR | Class A common stock | Award | 1.87% | 53,841 | 2,939,337 | 31 Dec 2025 | Direct | ||
| Lawrence E. Harris | IBKR | Class A common stock | Award | 0.2% | 389 | 199,093 | 31 Dec 2025 | Direct | ||
| Jill Bright | IBKR | Class A common stock | Award | 3.78% | 389 | 10,693 | 31 Dec 2025 | Direct | ||
| Richard H. Repetto | IBKR | Class A common stock | Award | 17.2% | 389 | 2,657 | 31 Dec 2025 | Direct | ||
| Milan Galik | IBKR | Class A common stock | Award | 6.93% | 225,039 | 3,470,039 | 31 Dec 2025 | Direct | ||
| Earl H. Nemser | IBKR | Class A common stock | Award | 5.52% | 23,629 | 451,441 | 31 Dec 2025 | Direct | ||
| Thomas Aj Frank | IBKR | Class A common stock | Award | 5.18% | 13,944 | 283,248 | 31 Dec 2025 | Direct | ||
| Denis Mendonca | IBKR | Class A common stock | Award | 7.69% | 11,156 | 156,228 | 31 Dec 2025 | Direct | ||
| Lori A. Conkling | IBKR | Class A common stock | Award | 1,556 | 1,556 | 31 Dec 2025 | Direct | |||
| Nicole Yuen | IBKR | Class A common stock | Award | 4.16% | 389 | 9,737 | 31 Dec 2025 | Direct | ||
| William Peterffy | IBKR | Class A common stock | Award | 4.16% | 389 | 9,737 | 31 Dec 2025 | Direct | ||
| Milan Galik | IBKR | Class A common stock | Other | -100% | -895,688 | 0 | 29 Dec 2025 | Immediate Family Member | ||
| Lawrence E. Harris | IBKR | Class A common stock | Sale | -5.08% | $734,505 | $69.00 | -10,645 | 198,704 | 29 Oct 2025 | Direct |
| Lawrence E. Harris | IBKR | Class A common stock | Sale | -3.17% | $474,023 | $69.15 | -6,855 | 209,349 | 28 Oct 2025 | Direct |
| Lawrence E. Harris | IBKR | Class A common stock | Sale | -3.35% | $522,975 | $69.73 | -7,500 | 216,204 | 27 Oct 2025 | Direct |
| Lawrence E. Harris | IBKR | Class A common stock | Sale | -3.45% | $548,000 | $68.50 | -8,000 | 223,704 | 24 Oct 2025 | Direct |
| Jill Bright | IBKR | Class A common stock | Purchase | 4.04% | $26,380 | $65.95 | 400 | 10,304 | 23 Oct 2025 | Direct |
| Lawrence E. Harris | IBKR | Class A common stock | Sale | -8.67% | $1,487,860 | $67.63 | -22,000 | 231,704 | 23 Oct 2025 | Direct |
| Paul J. Brody | IBKR | Class A common stock | Sale | -31.2% | $217,995 | $69.56 | -3,134 | 6,928 | 30 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -64.4% | $1,236,997 | $67.87 | -18,227 | 10,062 | 29 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -37.6% | $1,122,041 | $65.78 | -17,058 | 28,289 | 26 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -24% | $926,513 | $64.81 | -14,296 | 45,347 | 25 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -19.4% | $932,684 | $64.81 | -14,391 | 59,643 | 24 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -20.4% | $1,242,273 | $65.30 | -19,025 | 74,034 | 23 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -6.39% | $447,964 | $64.66 | -6,928 | 101,473 | 19 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -42.4% | $7,564,312 | $64.73 | -116,861 | 158,954 | 18 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -27.9% | $6,629,479 | $62.24 | -106,521 | 275,815 | 17 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -20.6% | $6,173,684 | $62.24 | -99,188 | 382,336 | 16 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -16.7% | $6,078,562 | $63.12 | -96,294 | 481,524 | 15 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -14.4% | $6,227,389 | $64.06 | -97,209 | 577,818 | 12 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -14.3% | $7,118,241 | $63.23 | -112,574 | 675,027 | 11 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -11.8% | $6,557,674 | $62.51 | -104,906 | 787,601 | 10 Sep 2025 | by PJB Holdings LLC |
| Paul J. Brody | IBKR | Class A common stock | Sale | -10.8% | $6,650,489 | $61.87 | -107,493 | 892,507 | 09 Sep 2025 | by PJB Holdings LLC |
| Earl H. Nemser | IBKR | Class A common stock | Sale | -11.9% | $3,449,442 | $64.00 | -53,900 | 400,000 | 14 Aug 2025 | by EN Holdings LLC |
| Earl H. Nemser | IBKR | Class A common stock | Sale | -1.65% | $492,994 | $64.87 | -7,600 | 453,900 | 13 Aug 2025 | by EN Holdings LLC |
| Earl H. Nemser | IBKR | Class A common stock | Sale | -29.6% | $13,099,588 | $67.49 | -194,086 | 461,500 | 12 Aug 2025 | by EN Holdings LLC |