Lawrence E. Harris is Director at Interactive Brokers Group, Inc. (IBKR). They have made 13 open-market trades across 1 company since 2007, most recently 2026-04-28.
CIK 0001406586
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
9 open-market purchases totalling $1.0M since 2007, against 4 sales. Across 9 scored buys the stock is down 0.6% at ninety days, and 0.8 points behind the S&P over the same stretch.
9 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| IBKR | 173,482 | $14.3M |
Shares reported on the most recent Form 4, priced at the 2026-04-29 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 0% | 0% | 0% |
| Avg Move | -19.4% | -0.6% | -0.6% |
| Alpha | -13.6% | -0.8% | -0.8% |
| Scored | 9 | 9 | 9 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| IBKR | SELL | 2026-04-28 | 2026-04-29 | $76.93 | $2.0M | +10.1% | +12.8% | +17.9% |
| IBKR | SELL | 2025-10-29 | 2025-10-31 | $69.00 | $735K | +2.6% | -10.4% | +6.7% |
| IBKR | SELL | 2025-10-27 | 2025-10-29 | $69.45 | $2.0M | +3.6% | -5.3% | +9.9% |
| IBKR | SELL | 2025-10-23 | 2025-10-27 | $67.86 | $2.0M | -0.2% | -8.3% | +7.6% |
| IBKR | BUY | 2011-08-01 | 2011-08-03 | $14.98 | $75K | -19.4% | -0.6% | -0.6% |
| IBKR | BUY | 2011-07-26 | 2011-07-27 | $15.12 | $151K | -19.4% | -0.6% | -0.6% |
| IBKR | BUY | 2011-07-25 | 2011-07-26 | $15.20 | $228K | -19.4% | -0.6% | -0.6% |
| IBKR | BUY | 2009-05-01 | 2009-05-04 | $14.23 | $71K | -19.4% | -0.6% | -0.6% |
| IBKR | BUY | 2009-02-02 | 2009-02-03 | $14.59 | $73K | -19.4% | -0.6% | -0.6% |
| IBKR | BUY | 2009-01-31 | 2009-02-02 | $15.21 | $76K | -19.4% | -0.6% | -0.6% |
| IBKR | BUY | 2008-10-27 | 2008-10-28 | $14.69 | $73K | -19.4% | -0.6% | -0.6% |
| IBKR | BUY | 2008-08-04 | 2008-08-06 | $27.10 | $136K | -19.4% | -0.6% | -0.6% |
| IBKR | BUY | 2007-07-30 | 2007-07-31 | $24.12 | $121K | -19.4% | -0.6% | -0.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.