Interactive Brokers Group, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Galik Milan | Chief Executive Officer | Other | 895,688 | — | — | — | Dec 29, 2025 |
| Harris Lawrence E | — | Sale | 10,645 | $69.00 | $734,505 | 198,704 | Oct 29, 2025 |
| Harris Lawrence E | — | Sale | 6,855 | $69.15 | $474,023 | 209,349 | Oct 27, 2025 |
| Harris Lawrence E | — | Sale | 22,000 | $67.63 | $1,487,860 | 231,704 | Oct 24, 2025 |
| Bright Jill | — | Purchase | 400 | $65.95 | $26,380 | 10,304 | Oct 23, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Sale | 2,021 | $68.70 | $138,843 | 10,062 | Sep 29, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Sale | 1,182 | $63.81 | $75,423 | 58,461 | Sep 26, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Sale | 12,798 | $65.49 | $838,141 | 74,034 | Sep 23, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Sale | 140 | $65.19 | $9,127 | 108,261 | Sep 22, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Sale | 6,928 | $64.66 | $447,964 | 101,473 | Sep 19, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Sale | 44,727 | $62.48 | $2,794,543 | 275,815 | Sep 17, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Sale | 37,506 | $63.79 | $2,392,508 | 483,023 | Sep 16, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Sale | 57,851 | $62.94 | $3,641,142 | 729,750 | Sep 11, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Sale | 104,906 | $62.51 | $6,557,674 | 787,601 | Sep 9, 2025 |
| Nemser Earl H | Vice Chairman | Sale | 33,379 | $63.86 | $2,131,583 | 420,521 | Aug 14, 2025 |
| Nemser Earl H | Vice Chairman | Sale | 41,086 | $67.88 | $2,788,918 | 461,500 | Aug 12, 2025 |
| Nemser Earl H | Vice Chairman | Sale | 10,200 | $65.60 | $669,120 | 671,068 | Aug 11, 2025 |
| Nemser Earl H | Vice Chairman | Sale | 441 | $64.35 | $28,378 | 681,268 | Aug 7, 2025 |
| Nemser Earl H | Vice Chairman | Sale | 11,041 | $63.64 | $702,649 | 708,750 | Aug 5, 2025 |
| Nemser Earl H | Vice Chairman | Sale | 1,200 | $62.79 | $75,348 | 744,273 | Jul 31, 2025 |
| Nemser Earl H | Vice Chairman | Sale | 32,386 | $66.32 | $2,147,840 | 367,514 | Jul 30, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Award / Grant | 1,000,000 | $66.22 | $66,220,000 | 1,000,000 | Jul 30, 2025 |
| Nemser Earl H | Vice Chairman | Award / Grant | 400,000 | $66.22 | $26,488,000 | 760,114 | Jul 30, 2025 |
| Nemser Earl H | Vice Chairman | Sale | 100 | $65.90 | $6,590 | 399,900 | Jul 28, 2025 |
| Nemser Earl H | Vice Chairman | Gift | 500 | — | — | 427,812 | Jun 23, 2025 |
| Nemser Earl H | Vice Chairman | Tax Withholding | 5,178 | $185.60 | $961,037 | 107,078 | May 9, 2025 |
| Brody Paul Jonathan | Chief Financial Officer | Tax Withholding | 22,192 | $185.60 | $4,118,835 | 721,374 | May 9, 2025 |
| Mendonca Denis | Chief Accounting Officer | Tax Withholding | 2,467 | $185.60 | $457,875 | 36,268 | May 9, 2025 |
| Frank Thomas AJ | Executive Vice President | Tax Withholding | 8,212 | $185.60 | $1,524,147 | 67,326 | May 9, 2025 |
| Nemser Earl H | Vice Chairman | Tax Withholding | 5,178 | $185.60 | $961,037 | 107,078 | May 9, 2025 |
| Galik Milan | Chief Executive Officer | Tax Withholding | 63,580 | $185.60 | $11,800,448 | 811,250 | May 9, 2025 |
| Peterffy Thomas | Chairman | Gift | 6,447 | — | — | 1,516,182 | Feb 20, 2025 |
| Peterffy Thomas | Chairman | Gift | 85,427 | — | — | 1,527,499 | Feb 18, 2025 |
| Bright Jill | — | Purchase | 135 | $219.51 | $29,634 | 2,476 | Jan 31, 2025 |
| Peterffy William | — | Award / Grant | 142 | $176.67 | $25,087 | 2,337 | Dec 31, 2024 |
| Frank Thomas AJ | Executive Vice President | Award / Grant | 6,709 | — | — | 75,538 | Dec 31, 2024 |
| Repetto Richard H | — | Award / Grant | 425 | — | — | 425 | Dec 31, 2024 |
| Harris Lawrence E | — | Award / Grant | 142 | $176.67 | $25,087 | 63,426 | Dec 31, 2024 |
| Galik Milan | Chief Executive Officer | Award / Grant | 69,305 | — | — | 874,688 | Dec 31, 2024 |
| Nemser Earl H | Vice Chairman | Award / Grant | 7,763 | — | — | 112,114 | Dec 31, 2024 |
| Yuen Nicole | — | Award / Grant | 142 | $176.67 | $25,087 | 2,337 | Dec 31, 2024 |
| Bright Jill | — | Award / Grant | 142 | $176.67 | $25,087 | 2,341 | Dec 31, 2024 |
| Brody Paul Jonathan | Chief Financial Officer | Award / Grant | 18,130 | — | — | 743,424 | Dec 31, 2024 |
| Mendonca Denis | Chief Accounting Officer | Award / Grant | 3,748 | — | — | 38,735 | Dec 31, 2024 |
| Galik Milan | Chief Executive Officer | Gift | 223,922 | — | — | 805,383 | Dec 31, 2024 |
| Galik Milan | Chief Executive Officer | Other | 223,922 | $191.31 | $42,838,518 | 223,922 | Nov 27, 2024 |
| Peterffy Thomas | Chairman | Gift | 79,975 | — | — | 1,612,926 | Oct 1, 2024 |
| Nemser Earl H | Vice Chairman | Award / Grant | 100,000 | $118.57 | $11,857,000 | 100,000 | Jul 25, 2024 |
| Mendonca Denis | Chief Accounting Officer | Tax Withholding | 1,964 | $119.13 | $233,971 | 34,987 | May 9, 2024 |
| Brody Paul Jonathan | Chief Financial Officer | Tax Withholding | 22,883 | $119.13 | $2,726,052 | 725,294 | May 9, 2024 |