🕵️ Inhibrx Biosciences, Inc. ($INBX)
SEC insider & ownership activity, last 12 months · CIK 2007919 · every row links its SEC filing
Over the last 12 months insiders sold $11.3M with no open-market buying against it. Viking Global Investors LP sold $11.3M in discretionary trades (Oct). Blackrock, Inc. added 4.7% → 5.3%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 1 seller, $11.3M (3 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Viking Global Investors LP | 0 | – | 3 | $11.3M | Oct 7, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Perceptive Advisors LLC | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Joseph Edelman | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Perceptive Life Sciences Master Fund, Ltd. | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Investors LP | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Opportunities Parent GP LLC | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Halvorsen Ole Andreas | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Shabet Rose Sharon | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| David C. Ott | 10.0% | 13G | Feb 17, 2026 | filing ↗ | |
| Viking Global Opportunities GP LLC | 9.3% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Opportunities Portfolio GP LLC | 8.8% | 13G | May 15, 2026 | filing ↗ | |
| Viking Global Opportunities Illiquid Investments Sub-Master LP | 8.8% | 13G | May 15, 2026 | filing ↗ | |
| Jon Faiz Kayyem | 7.9% | 13D | Jun 3, 2024 | filing ↗ | |
| Morgan Stanley | 7.9% | 13G | Feb 11, 2026 | filing ↗ | |
| Mark Lappe | 6.4% | 13D | Sep 12, 2024 | filing ↗ | |
| Morgan Stanley Capital Services LLC | 6.3% | 13G | Feb 11, 2026 | filing ↗ | |
| Blackrock, Inc. | 5.3% | 13G | Jan 21, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Material agreement (1.01) | Jul 15, 2026 | filing ↗ |
| New financial obligation (2.03) | Jul 15, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Jul 15, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 15, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 15, 2026 | filing ↗ |
| Other events (8.01) | Jun 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 15, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 3, 2026 | filing ↗ |
| Earnings (2.02) | May 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 14, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 11, 2026 | filing ↗ |
| Other events (8.01) | May 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 11, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 21, 2026 | filing ↗ |
| Other events (8.01) | Apr 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 21, 2026 | filing ↗ |
| Earnings (2.02) | Mar 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 19, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 23, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 16, 2025 | filing ↗ |
| Other events (8.01) | Dec 16, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 16, 2025 | filing ↗ |
| Earnings (2.02) | Nov 14, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 14, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 23, 2025 | filing ↗ |
| Other events (8.01) | Oct 23, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 23, 2025 | filing ↗ |
| Earnings (2.02) | Aug 13, 2025 | filing ↗ |