🕵️ Interactive Brokers Group, Inc. ($IBKR)
SEC insider & ownership activity, last 12 months · CIK 1381197 · every row links its SEC filing
Over the last 12 months insiders sold $70.0M against $44K of open-market buying. Brody Paul Jonathan sold $33.5M through a 10b5-1 trading plan in 27 lots (Sep). BlackRock, Inc. trimmed 9.5% → 6.2%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
2 buyers, $44K (9 lots) · 3 sellers, $70.0M (41 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Brody Paul Jonathan | 0 | – | 27 | $33.5M | Sep 30, 2025 |
| Earl H. Nemser | 0 | – | 8 | $30.7M | Jan 27, 2026 |
| Lawrence E. Harris | 0 | – | 6 | $5.8M | Apr 28, 2026 |
| Bright Jill | 1 | $26K | 0 | – | Oct 23, 2025 |
| Lori A. Conkling | 8 | $18K | 0 | – | Sep 1, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Vanguard Capital Management | 7.3% | 13G | Apr 30, 2026 | filing ↗ | |
| BlackRock, Inc. | 6.2% | 13G | Oct 17, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Lawrence E. Harris | $2.0M | Apr 28, 2026 | filing ↗ |
| Earl H. Nemser | $30.3M | Jan 22, 2026 | filing ↗ |
| Lawrence E. Harris | $4.9M | Oct 23, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Jul 31, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 31, 2026 | filing ↗ |
| Other events (8.01) | Jul 31, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 31, 2026 | filing ↗ |
| Earnings (2.02) | Jul 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 21, 2026 | filing ↗ |
| Shareholder vote (5.07) | Apr 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 23, 2026 | filing ↗ |
| Earnings (2.02) | Apr 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 21, 2026 | filing ↗ |
| Earnings (2.02) | Jan 20, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 20, 2026 | filing ↗ |
| Earnings (2.02) | Oct 16, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 16, 2025 | filing ↗ |