Through the 90-day period concluding February 07, 2026, Interactive Brokers's top three insider stakeholders include Chairman Thomas Peterffy (6.06Mn shares), Chief Executive Officer Milan Galik (3.47Mn shares), Chief Financial Officer Paul Jonathan Brody (2.95Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Milan Galik | Chief Executive Officer | 3,470,428 | 26 Jan, 2026 |
| Paul Jonathan Brody | Chief Financial Officer | 2,946,654 | 26 Jan, 2026 |
| Thomas Peterffy | Chairman | 6,064,728 | 24 Feb, 2025 |
| Earl H Nemser | Vice Chairman | 451,830 | 26 Jan, 2026 |
| Thomas Aj Frank | Executive Vice President | 283,248 | 07 Jan, 2026 |
| Lawrence E Harris | 199,482 | 26 Jan, 2026 | |
| Denis Mendonca | Chief Accounting Officer | 156,228 | 07 Jan, 2026 |
| Jill Bright | 11,082 | 26 Jan, 2026 | |
| William Peterffy | 10,126 | 26 Jan, 2026 | |
| Nicole Yuen | 10,126 | 26 Jan, 2026 | |
| Richard H Repetto | 3,046 | 26 Jan, 2026 | |
| Philip Uhde | 10,288 | 09 Jan, 2024 | |
| Lori A Conkling | 2,334 | 26 Jan, 2026 | |
| John M. Damgard | 8,752 | 06 Jan, 2022 | |
| Gary Katz | 7,712 | 06 Jan, 2023 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 27 Jan, 2026 | Earl H Nemser | Class A common stock | D | 39,731 | $75.07 | 20,469 | I | S |
| 27 Jan, 2026 | Earl H Nemser | Class A common stock | D | 20,469 | $75.75 | 0 | I | S |
| 26 Jan, 2026 | Earl H Nemser | Class A common stock | D | 3,101 | $77.98 | 60,200 | I | S |
| 26 Jan, 2026 | Earl H Nemser | Class A common stock | D | 30,817 | $76.72 | 63,301 | I | S |
| 26 Jan, 2026 | Earl H Nemser | Class A common stock | D | 60,882 | $75.83 | 94,118 | I | S |
| 23 Jan, 2026 | Earl H Nemser | Class A common stock | D | 60,065 | $78.14 | 155,000 | I | S |
| 23 Jan, 2026 | Earl H Nemser | Class A common stock | D | 84,935 | $77.65 | 215,065 | I | S |
| 22 Jan, 2026 | Earl H Nemser | Class A common stock | D | 100,000 | $76.81 | 300,000 | I | S |
| 01 Jan, 2026 | Earl H Nemser | Class A common stock | A | 389 | $64.31 | 451,830 | D | A |
| 01 Jan, 2026 | Paul Jonathan Brody | Class A common stock | A | 389 | $64.31 | 2,939,726 | D | A |
| 01 Jan, 2026 | Milan Galik | Class A common stock | A | 389 | $64.31 | 3,470,428 | D | A |
| 01 Jan, 2026 | Lawrence E Harris | Class A common stock | A | 389 | $64.31 | 199,482 | D | A |
| 01 Jan, 2026 | Jill Bright | Class A common stock | A | 389 | $64.31 | 11,082 | D | A |
| 01 Jan, 2026 | William Peterffy | Class A common stock | A | 389 | $64.31 | 10,126 | D | A |
| 01 Jan, 2026 | Nicole Yuen | Class A common stock | A | 389 | $64.31 | 10,126 | D | A |
| 01 Jan, 2026 | Richard H Repetto | Class A common stock | A | 389 | $64.31 | 3,046 | D | A |
| 01 Jan, 2026 | Lori A Conkling | - | - | 2,334 | D | |||
| 01 Jan, 2026 | Lori A Conkling | Class A common stock | A | 389 | $64.31 | 2,334 | D | A |
| 31 Dec, 2025 | Earl H Nemser | Class A common stock | A | 389 | $64.31 | 451,441 | D | A |
| 31 Dec, 2025 | Earl H Nemser | Class A common stock | A | 23,240 | $0.00 | 451,052 | D | A |