Inhibrx Biosciences, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Viking Global Opportunities Parent GP LLC | — | Sale | 25,042 | $32.25 | $807,605 | 102,864 | Oct 7, 2025 |
| Kayyem Jon Faiz | — | Gift | 90,000 | — | — | 419,360 | Mar 27, 2025 |
| Kayyem Jon Faiz | — | Gift | 250,000 | — | — | 250,000 | Dec 16, 2024 |
| Kayyem Jon Faiz | — | Gift | 52,000 | — | — | 1,009,360 | Dec 6, 2024 |
| Kayyem Jon Faiz | — | Purchase | 34,843 | $14.23 | $495,816 | 51,093 | Nov 19, 2024 |
| Vuori Kristiina MD | — | Purchase | 6,667 | $15.00 | $100,005 | 20,443 | Oct 3, 2024 |
| Lappe Mark | Chief Executive Officer | Purchase | 26,963 | $15.05 | $405,793 | 692,511 | Sep 16, 2024 |
| Lappe Mark | Chief Executive Officer | Purchase | 26,000 | $15.29 | $397,540 | 647,548 | Sep 10, 2024 |
| Vuori Kristiina MD | — | Purchase | 6,457 | $15.07 | $97,307 | 13,776 | Sep 10, 2024 |
| Lappe Mark | Chief Executive Officer | Purchase | 10,000 | $14.03 | $140,300 | 135,000 | Sep 3, 2024 |
| Vuori Kristiina MD | — | Purchase | 7,140 | $14.00 | $99,960 | 7,140 | Aug 29, 2024 |
| MANHARD KIMBERLY | — | Purchase | 10,000 | $13.98 | $139,800 | 10,000 | Aug 28, 2024 |
| FORSYTH DOUGLAS | — | Purchase | 59,812 | $14.07 | $841,555 | 224,564 | Aug 22, 2024 |
| Lappe Mark | Chief Executive Officer | Purchase | 12,945 | $12.93 | $167,379 | 54,865 | Aug 20, 2024 |
| Kayyem Jon Faiz | — | Gift | 10,000 | — | — | 16,250 | Jun 24, 2024 |
| Kayyem Jon Faiz | — | Purchase | 49,284 | $17.23 | $849,163 | 1,142,145 | Jun 5, 2024 |
| Kayyem Jon Faiz | — | Purchase | 46,792 | $16.61 | $777,215 | 923,060 | Jun 3, 2024 |
| Inhibrx, Inc. | — | Other | 13,316,140 | — | — | 1,157,926 | May 29, 2024 |
| Lappe Mark | Chief Executive Officer | Award / Grant | 621,548 | — | — | 621,548 | May 29, 2024 |
| Kayyem Jon Faiz | — | Award / Grant | 6,250 | — | — | 6,250 | May 29, 2024 |
| FORSYTH DOUGLAS | — | Award / Grant | 149,564 | — | — | 149,564 | May 29, 2024 |
| Eckelman Brendan P. | Chief Scientific Officer | Award / Grant | 40,000 | — | — | 40,000 | May 29, 2024 |