Mark Lappe is CEO at Inhibrx, Inc. (INBX). They have made 17 open-market trades across 2 companies since 2007, most recently 2026-09-08.
CIK 0001366074
12 open-market purchases totalling $20.6M since 2007, against 5 sales. Across 11 scored buys the stock is down 1.7% at ninety days, and 4.9 points behind the S&P over the same stretch.
12 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| RPRX | 2,968,636 | $181.0M |
| INBX | 730,548 | $65.0M |
| INXB | 14,865 | — |
| Total | $246.0M |
Shares reported on the most recent Form 4, priced at the 2026-09-08 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 83% | 75% | 73% |
| Avg Move | +10.8% | -1.5% | -1.7% |
| Alpha | -20.7% | -2.9% | -4.9% |
| Scored | 12 | 12 | 11 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| INBX | BUY | 2026-09-08 | 2026-09-08 | $105.82 | $2.6M | -7.8% | -22.5% | — |
| INBX | BUY | 2024-09-12 | 2024-09-16 | $15.73 | $1.3M | -13.2% | -9.1% | -17.6% |
| INBX | BUY | 2024-09-06 | 2024-09-10 | $15.25 | $671K | +5.0% | +0.5% | -3.7% |
| INBX | BUY | 2024-08-29 | 2024-09-03 | $15.22 | $913K | +1.5% | -8.0% | -6.7% |
| INBX | BUY | 2024-08-20 | 2024-08-22 | $12.96 | $1.0M | +15.2% | +12.6% | +0.9% |
| INBX | SELL · 10b5-1 | 2023-02-28 | 2023-03-01 | $25.02 | $2K | +28.1% | +7.1% | +7.1% |
| INBX | SELL | 2022-12-19 | 2022-12-20 | $25.54 | $1.3M | +28.1% | +7.1% | +7.1% |
| INBX | SELL | 2022-11-17 | 2022-11-18 | $27.73 | $1.4M | +28.1% | +7.1% | +7.1% |
| INBX | SELL | 2022-10-17 | 2022-10-18 | $29.59 | $1.5M | +28.1% | +7.1% | +7.1% |
| RPRX | SELL | 2009-12-11 | 2009-12-15 | $0.69 | $265K | +18.4% | +1.1% | +1.1% |
| RPRX | BUY | 2008-10-31 | 2008-11-04 | $7.76 | $88K | +18.4% | +1.1% | +1.1% |
| RPRX | BUY | 2008-10-28 | 2008-10-30 | $6.94 | $238K | +18.4% | +1.1% | +1.1% |
| RPRX | BUY | 2008-10-23 | 2008-10-27 | $6.72 | $418K | +18.4% | +1.1% | +1.1% |
| RPRX | BUY | 2008-10-17 | 2008-10-21 | $6.42 | $193K | +18.4% | +1.1% | +1.1% |
| RPRX | BUY | 2008-10-10 | 2008-10-14 | $6.52 | $198K | +18.4% | +1.1% | +1.1% |
| RPRX | BUY | 2008-10-02 | 2008-10-06 | $6.50 | $12.0M | +18.4% | +1.1% | +1.1% |
| RPRX | SELL | 2008-03-14 | 2008-07-03 | $9.21 | $2.8M | +18.4% | +1.1% | +1.1% |
| RPRX | BUY | 2007-12-20 | 2007-12-21 | $9.45 | $945K | +18.4% | +1.1% | +1.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.