There are no significant Insider Shareholders in Interactive Brokers Group as of December 20, 2025.
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Thomas Peterffy | Chairman | 6,064,728 | 24 Feb, 2025 |
| Milan Galik | Chief Executive Officer | 4,140,688 | 03 Jun, 2025 |
| Earl H Nemser | Vice Chairman | 827,812 | 24 Jun, 2025 |
| Paul Jonathan Brody | Chief Financial Officer | 2,892,424 | 03 Jun, 2025 |
| Lawrence E Harris | 198,704 | 31 Oct, 2025 | |
| Thomas Aj Frank | Executive Vice President | 269,304 | 03 Jun, 2025 |
| Denis Mendonca | Chief Accounting Officer | 145,072 | 03 Jun, 2025 |
| Jill Bright | 10,304 | 27 Oct, 2025 | |
| Philip Uhde | 10,288 | 09 Jan, 2024 | |
| William Peterffy | 9,348 | 07 Jan, 2025 | |
| Nicole Yuen | 9,348 | 07 Jan, 2025 | |
| John M. Damgard | 8,752 | 06 Jan, 2022 | |
| Gary Katz | 7,712 | 06 Jan, 2023 | |
| Richard H Repetto | 2,268 | 07 Jan, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 29 Oct, 2025 | Lawrence E Harris | Class A common stock | D | 10,645 | $69.00 | 198,704 | D | S |
| 27 Oct, 2025 | Lawrence E Harris | Class A common stock | D | 7,500 | $69.73 | 216,204 | D | S |
| 28 Oct, 2025 | Lawrence E Harris | Class A common stock | D | 6,855 | $69.15 | 209,349 | D | S |
| 23 Oct, 2025 | Lawrence E Harris | Class A common stock | D | 22,000 | $67.63 | 231,704 | D | S |
| 23 Oct, 2025 | Jill Bright | Class A common stock | A | 400 | $65.95 | 10,304 | D | P |
| 24 Oct, 2025 | Lawrence E Harris | Class A common stock | D | 8,000 | $68.50 | 223,704 | D | S |
| 29 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 7,414 | $67.16 | 20,875 | I | S |
| 29 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 8,792 | $68.27 | 12,083 | I | S |
| 29 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 2,021 | $68.70 | 10,062 | I | S |
| 30 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 1,979 | $69.30 | 8,083 | I | S |
| 30 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 1,155 | $70.00 | 6,928 | I | S |
| 25 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 1,182 | $63.81 | 58,461 | I | S |
| 25 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 8,866 | $64.76 | 49,595 | I | S |
| 25 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 4,248 | $65.19 | 45,347 | I | S |
| 25 Sep, 2025 | Paul Jonathan Brody | - | - | 45,347 | I | |||
| 26 Sep, 2025 | Paul Jonathan Brody | - | - | 29,870 | I | |||
| 26 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 15,477 | $65.74 | 29,870 | I | S |
| 26 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 1,581 | $66.15 | 28,289 | I | S |
| 26 Sep, 2025 | Paul Jonathan Brody | - | - | 28,289 | I | |||
| 23 Sep, 2025 | Paul Jonathan Brody | Class A common stock | D | 6,227 | $64.90 | 86,832 | I | S |