INBX
Inhibrx Biosciences, Inc.
Stock Price & Insider Activity
Historical close with open-market insider transaction markers
Insider activity
Sign in to download CSVBought$72.8M36 buy days
Sold$39.3M34 sell days
Net insider flow+$33.5Mnet buying · 10 years
Latest trade2026-10-14Lappe Mark
| Date | Side | Insider | Role | Shares | Avg price | Value | Trades |
|---|---|---|---|---|---|---|---|
| 2026-10-14 | Buy | Lappe Mark | CEO | 9,940 | $84.55 | $840.4K | 5 |
| 2026-09-28 | Buy | Lappe Mark | CEO | 4,500 | $100.76 | $453.4K | 2 |
| 2026-09-25 | Buy | Lappe Mark | CEO | 5,500 | $99.16 | $545.4K | 2 |
| 2026-09-23 | Buy | Kayyem Jon Faiz | Director | 5,000 | $100.00 | $500.0K | 1 |
| 2026-09-16 | Buy | Kayyem Jon Faiz | Director | 5,000 | $100.00 | $500.0K | 1 |
| 2026-09-15 | Sell | MANHARD KIMBERLY | Director | 500 | $105.05 | $52.5K | 1 |
| 2026-09-14 | Sell | MANHARD KIMBERLY | Director | 500 | $110.26 | $55.1K | 1 |
| 2026-09-11 | Sell | MANHARD KIMBERLY | Director | 500 | $111.78 | $55.9K | 1 |
| 2026-09-09 | Sell | MANHARD KIMBERLY | Director | 500 | $115.80 | $57.9K | 1 |
| 2026-09-08 | Buy | Lappe Mark | CEO | 25,000 | $105.82 | $2.6M | 6 |
| 2026-09-08 | Buy | Kayyem Jon Faiz | Director | 5,000 | $113.52 | $567.6K | 1 |
| 2026-09-08 | Buy | FORSYTH DOUGLAS | Director | 2,500 | $114.65 | $286.6K | 1 |
| 2026-09-08 | Sell | MANHARD KIMBERLY | Director | 500 | $115.14 | $57.6K | 1 |
| 2025-10-07 | Sell | VIKING GLOBAL INVESTORS LP | 10% owner | 350,000 | $32.25 | $11.3M | 3 |
| 2024-11-20 | Buy | Kayyem Jon Faiz | Director | 18,750 | $14.19 | $266.1K | 1 |
| 2024-11-19 | Buy | Kayyem Jon Faiz | Director | 34,843 | $14.23 | $495.8K | 1 |
| 2024-10-03 | Buy | Vuori Kristiina MD | Director | 6,667 | $15.00 | $100.0K | 1 |
| 2024-09-16 | Buy | Lappe Mark | CEO | 13,037 | $17.13 | $223.3K | 1 |
| 2024-09-12 | Buy | Lappe Mark | CEO | 26,963 | $15.05 | $405.8K | 1 |
| 2024-09-11 | Buy | Vuori Kristiina MD | Director | 6,457 | $15.07 | $97.3K | 1 |
| 2024-09-10 | Buy | Lappe Mark | CEO | 8,500 | $15.19 | $129.1K | 1 |
| 2024-09-10 | Buy | Vuori Kristiina MD | Director | 179 | $15.00 | $2.7K | 1 |
| 2024-09-09 | Buy | Lappe Mark | CEO | 9,500 | $15.21 | $144.5K | 1 |
| 2024-09-06 | Buy | Lappe Mark | CEO | 26,000 | $15.29 | $397.5K | 1 |
| 2024-09-03 | Buy | Lappe Mark | CEO | 20,000 | $15.81 | $316.3K | 2 |
| 2024-08-30 | Buy | Lappe Mark | CEO | 10,000 | $14.02 | $140.2K | 1 |
| 2024-08-29 | Buy | Lappe Mark | CEO | 10,000 | $14.03 | $140.3K | 1 |
| 2024-08-29 | Buy | Vuori Kristiina MD | Director | 7,140 | $14.00 | $100.0K | 1 |
| 2024-08-28 | Buy | MANHARD KIMBERLY | Director | 10,000 | $13.98 | $139.8K | 1 |
| 2024-08-23 | Buy | FORSYTH DOUGLAS | Director | 59,812 | $14.07 | $841.6K | 1 |
| 2024-08-22 | Buy | FORSYTH DOUGLAS | Director | 15,188 | $12.89 | $195.8K | 1 |
| 2024-08-21 | Buy | Lappe Mark | CEO | 12,945 | $12.93 | $167.4K | 1 |
| 2024-08-20 | Buy | Lappe Mark | CEO | 27,055 | $12.97 | $350.9K | 1 |
| 2024-06-05 | Buy | Kayyem Jon Faiz | Director | 57,549 | $17.32 | $997.0K | 2 |
| 2024-06-04 | Buy | Kayyem Jon Faiz | Director | 89,063 | $17.65 | $1.6M | 2 |
| 2024-06-03 | Buy | Kayyem Jon Faiz | Director | 127,530 | $17.43 | $2.2M | 2 |
| 2024-05-31 | Buy | Kayyem Jon Faiz | Director | 70,193 | $16.14 | $1.1M | 1 |
| 2024-05-28 | Sell | Eckelman Brendan P. | Other C-suite | 300,000 | $34.30 | $10.3M | 1 |
| 2023-08-28 | Buy | VIKING GLOBAL INVESTORS LP | 10% owner | 511,627 | $19.35 | $9.9M | 1 |
| 2023-03-01 | Sell | Eckelman Brendan P. | Other C-suite | 40,000 | $24.21 | $968.2K | 2 |
| 2023-02-28 | Sell | Lappe Mark | CEO | 60 | $25.02 | $1.5K | 1 |
| 2023-02-02 | Sell | Eckelman Brendan P. | Other C-suite | 11,250 | $25.45 | $286.3K | 2 |
| 2023-02-01 | Sell | Eckelman Brendan P. | Other C-suite | 28,750 | $24.72 | $710.8K | 3 |
| 2023-01-24 | Sell | Lappe Mark | CEO | 4,335 | $25.72 | $111.5K | 2 |
| 2023-01-23 | Sell | Lappe Mark | CEO | 21,665 | $25.36 | $549.4K | 1 |
| 2023-01-23 | Sell | Kayyem Jon Faiz | Director | 9,500 | $25.26 | $240.0K | 1 |
| 2023-01-04 | Sell | Eckelman Brendan P. | Other C-suite | 7,105 | $23.48 | $166.8K | 2 |
| 2023-01-03 | Sell | Eckelman Brendan P. | Other C-suite | 32,895 | $23.76 | $781.7K | 3 |
| 2022-12-21 | Sell | Kayyem Jon Faiz | Director | 9,500 | $27.02 | $256.7K | 2 |
| 2022-12-19 | Sell | Lappe Mark | CEO | 26,000 | $25.55 | $664.4K | 2 |
| 2022-12-06 | Sell | Eckelman Brendan P. | Other C-suite | 40,000 | $27.21 | $1.1M | 3 |
| 2022-11-21 | Sell | Kayyem Jon Faiz | Director | 9,500 | $29.89 | $284.0K | 2 |
| 2022-11-17 | Sell | Lappe Mark | CEO | 26,000 | $27.88 | $724.9K | 7 |
| 2022-11-01 | Sell | Eckelman Brendan P. | Other C-suite | 40,000 | $33.51 | $1.3M | 2 |
| 2022-10-21 | Sell | Kayyem Jon Faiz | Director | 9,500 | $30.13 | $286.3K | 2 |
| 2022-10-17 | Sell | Lappe Mark | CEO | 26,000 | $29.59 | $769.4K | 4 |
| 2022-10-07 | Buy | VIKING GLOBAL INVESTORS LP | 10% owner | 1,333,333 | $30.00 | $40.0M | 2 |
| 2022-10-04 | Sell | Eckelman Brendan P. | Other C-suite | 40,000 | $27.82 | $1.1M | 7 |
| 2022-09-06 | Sell | Eckelman Brendan P. | Other C-suite | 40,000 | $14.91 | $596.4K | 2 |
| 2022-08-03 | Sell | Eckelman Brendan P. | Other C-suite | 15,500 | $18.47 | $286.3K | 1 |
| 2022-08-02 | Sell | Eckelman Brendan P. | Other C-suite | 24,500 | $17.70 | $433.6K | 1 |
| 2022-07-07 | Sell | Eckelman Brendan P. | Other C-suite | 40,000 | $17.17 | $686.8K | 1 |
| 2022-04-05 | Sell | Eckelman Brendan P. | Other C-suite | 400 | $25.04 | $10.0K | 1 |
| 2021-03-24 | Sell | Eckelman Brendan P. | Other C-suite | 17,000 | $19.02 | $323.3K | 1 |
| 2021-02-17 | Sell | Wagner Klaus W. | Other C-suite | 19,559 | $25.29 | $494.6K | 1 |
| 2021-02-16 | Sell | Wagner Klaus W. | Other C-suite | 156,474 | $24.32 | $3.8M | 1 |
| 2021-02-16 | Sell | Eckelman Brendan P. | Other C-suite | 17,000 | $25.90 | $440.3K | 1 |
| 2020-08-26 | Buy | VIKING GLOBAL INVESTORS LP | 10% owner | 180,219 | $18.92 | $3.4M | 2 |
| 2020-08-25 | Buy | VIKING GLOBAL INVESTORS LP | 10% owner | 85,304 | $19.36 | $1.7M | 2 |
| 2020-08-24 | Buy | VIKING GLOBAL INVESTORS LP | 10% owner | 46,161 | $19.43 | $896.9K | 1 |