Mark Lappe
Chief Executive Officer at Inhibrx Biosciences Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 3 years
- Director since
- 2024
3 years of board service in total across 1 board, counting each seat separately. Longest: Inhibrx Biosciences Inc., 2 years.
Chief executive roles
Weak · grade F
Out of 100, from shareholder return, dividends, growth and acquisitions.
Partial: only 20% of the scoring weight is on file.
- Revenue growth 20%
- 0
-15% a year in revenue
20% of the scoring weight is on file. Figures cover December 2023 – December 2025.
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 28, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +1,500 | $98.88 | $148,320 |
| Sep 28, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +3,000 | $101.70 | $305,100 |
| Sep 25, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +3,324 | $98.87 | $328,644 |
| Sep 25, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +2,176 | $99.60 | $216,730 |
| Sep 8, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +5,895 | $99.29 | $585,315 |
| Sep 8, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +6,605 | $100.64 | $664,727 |
| Sep 8, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +1,100 | $107.12 | $117,832 |
| Sep 8, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +500 | $108.24 | $54,120 |
| Sep 8, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +1,219 | $111.88 | $136,382 |
| Sep 8, 2026 | Inhibrx Biosciences Inc. | Open-market purchase | +9,681 | $112.28 | $1,086,983 |
| Sep 16, 2024 | Inhibrx Biosciences Inc. | Open-market purchase | +13,037 | $17.13 | $223,324 |
| Sep 12, 2024 | Inhibrx Biosciences Inc. | Open-market purchase | +26,963 | $15.05 | $405,793 |
| Sep 10, 2024 | Inhibrx Biosciences Inc. | Open-market purchase | +8,500 | $15.19 | $129,115 |
| Sep 9, 2024 | Inhibrx Biosciences Inc. | Open-market purchase | +9,500 | $15.21 | $144,495 |
| Sep 6, 2024 | Inhibrx Biosciences Inc. | Open-market purchase | +26,000 | $15.29 | $397,540 |
Questions about Mark Lappe
What boards is Mark Lappe on?
Mark Lappe sits on the board of Inhibrx Biosciences Inc.
What company is Mark Lappe the CEO of?
Mark Lappe has been Chief Executive Officer of Inhibrx Biosciences Inc. since May 2024.
How long has Mark Lappe served on boards?
Our records show at least 3 years of board service across 1 board, the earliest from 2024.
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