Inhibrx Biosciences, Inc.
INBX- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0002007919
In the last 90 days, Inhibrx Biosciences, Inc. insiders filed 5 open-market purchases and 2 sales; 162 institutions reported holding it in 13F filings for Q2 2026, worth $1.36B in total; Viking Global Investors is the only superinvestor holding it.
Holders of 5% or more of INBX
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Inhibrx Biosciences, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Perceptive Advisors LLC | 13G/A | 9.99%1.49M shares | 0.00 ppfrom 9.99% | May 15, 20262 filings | Aug 14, 2026 | SEC |
| Viking Global Investors LPSuperinvestorViking Global Investors | 13G/A | 9.30%1.38M shares | −0.69 ppfrom 9.99% | Feb 17, 20263 filings | Aug 14, 2026 | SEC |
| Morgan Stanley | 13G | 7.90%1.16M shares | New | Feb 11, 20261 filing | Feb 11, 2026 | SEC |
| Kayyem Jon Faiz | 13D/A | 7.90%1.15M shares | – | Feb 26, 20251 filing | Feb 26, 2025 | SEC |
| Lappe Mark | 13D/A | 6.40%925.4K shares | – | Feb 26, 20251 filing | Feb 26, 2025 | SEC |
| Bank of America Corp | 13G | 5.90%857.3K shares | New | Aug 3, 20261 filing | Aug 3, 2026 | SEC |
| Schonfeld Strategic Advisors LLC | 13G | 5.33%781.7K shares | New | Aug 14, 20261 filing | Aug 14, 2026 | SEC |
| BlackRock, Inc. | 13G | 5.30%768.1K shares | +0.60 ppfrom 4.70% | Feb 4, 20253 filings | Jan 21, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
13 Schedule 13D and 13G filings on Inhibrx Biosciences, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20265:19 PM ET | Perceptive Advisors LLCand 2 others | 13G/A | 9.99%1.49M shares | 0.00 ppfrom 9.99% | Jun 30, 2026 | SEC |
| Aug 14, 20264:15 PM ET | Schonfeld Strategic Advisors LLC | 13G | 5.33%781.7K shares | New | Jun 30, 2026 | SEC |
| Aug 14, 20264:10 PM ET | Viking Global Investors LPand 10 othersSuperinvestorViking Global Investors | 13G/A | 9.30%1.38M shares | −0.69 ppfrom 9.99% | Jun 30, 2026 | SEC |
| Aug 3, 202612:26 PM ET | Bank of America Corp | 13G | 5.90%857.3K shares | New | Jun 30, 2026 | SEC |
| May 15, 20265:48 PM ET | Viking Global Investors LPand 10 othersSuperinvestorViking Global Investors | 13G/A | 9.99%1.46M shares | 0.00 ppfrom 9.99% | Mar 31, 2026 | SEC |
| May 15, 20264:00 PM ET | Perceptive Advisors LLCand 2 others | 13G/A | 9.99%1.46M shares | – | Mar 31, 2026 | SEC |
| Feb 17, 20264:26 PM ET | Viking Global Investors LPand 11 othersSuperinvestorViking Global Investors | 13G/A | 9.99%1.45M shares | – | Dec 31, 2025 | SEC |
| Feb 11, 20261:33 PM ET | Morgan Stanleyand 1 other | 13G | 7.90%1.16M shares | New | Dec 31, 2025 | SEC |
| Jan 21, 202612:30 PM ET | BlackRock, Inc. | 13G | 5.30%768.1K shares | +0.60 ppfrom 4.70% | Dec 31, 2025 | SEC |
| Oct 17, 20256:13 PM ET | BlackRock, Inc. | 13G/A | 4.70%680.4K shares | −1.00 ppfrom 5.70%Below 5% | Sep 30, 2025 | SEC |
| Feb 26, 20254:26 PM ET | Kayyem Jon Faizand 1 other | 13D/A | 7.90%1.15M shares | – | Jun 3, 2024 | SEC |
| Feb 26, 20254:16 PM ET | Lappe Mark | 13D/A | 6.40%925.4K shares | – | Sep 12, 2024 | SEC |
| Feb 4, 20253:45 PM ET | BlackRock, Inc. | 13G | 5.70%831.8K shares | New | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Inhibrx Biosciences, Inc. shares.
No Form 144 notices for Inhibrx Biosciences, Inc. are on file.