Lawrence E. Harris, Director at Interactive Brokers Group, Inc. (IBKR), bought 5,000 shares at $27.10 ($136K) on 2008-08-04, disclosed to the SEC on 2008-08-06.
Open-market purchase of $136k IBKR by Director. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Something here stands out, but not much.
| Filing → |
| IBKR | SELL | 2025-10-29 | $2.0M | — | Filing → |
| IBKR | SELL | 2025-10-27 | $2.0M | — | Filing → |
| IBKR | BUY | 2011-08-03 | $75K | — | Filing → |