Nemser Earl H (CIK 1391400) reported 45 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-08-04). Recent activity: Buy IBKR (803,568 shares), Sell IBKR (22,486 shares), Sell IBKR (60,882 shares), Sell IBKR (30,817 shares), Sell IBKR (3,101 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-04 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Buy | 803,568 | $70.7M |
| 2026-05-28 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 22,486 | $1.9M |
| 2026-01-28 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 60,882 | $4.6M |
| 2026-01-28 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 30,817 | $2.4M |
| 2026-01-28 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 3,101 | $241,816 |
| 2026-01-28 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 39,731 | $3.0M |
| 2026-01-28 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 20,469 | $1.6M |
| 2026-01-26 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 100,000 | $7.7M |
| 2026-01-26 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 84,935 | $6.6M |
| 2026-01-26 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 60,065 | $4.7M |
| 2026-01-26 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Buy | 389 | $25,017 |
| 2026-01-07 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Buy | 389 | $25,017 |
| 2026-01-07 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Buy | 23,240 | $0 |
| 2025-08-15 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 33,379 | $2.1M |
| 2025-08-15 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 20,521 | $1.3M |
| 2025-08-14 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 153,000 | $10.3M |
| 2025-08-14 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 41,086 | $2.8M |
| 2025-08-14 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 4,600 | $293,250 |
| 2025-08-14 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 200 | $12,838 |
| 2025-08-14 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 200 | $13,218 |
| 2025-08-14 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 2,400 | $160,248 |
| 2025-08-14 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 200 | $13,440 |
| 2025-08-12 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 10,200 | $669,120 |
| 2025-08-12 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 2,641 | $174,148 |
| 2025-08-12 | Interactive Brokers Group, Inc. (IBKR) | Vice Chairman | Sell | 12,841 | $848,662 |
Source: SEC Form 4 filings · as of 2026-08-04