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 6 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.
13F holders, Q1 2026
Institutional positions in Inhibrx Biosciences, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 135
- −1 vs. Q4 2025
- Shares held
- 12.7M
- +692.5K (+5.8%) vs. Q4 2025
- Total value
- $854.6M
- −$95.1M (−10.0%) vs. Q4 2025
- New holders
- 25
- 55 more added
- Sold out
- 26
- 34 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting INBX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 162 | $1.36B |
| Q1 2026 | 135 | $854.6M |
| Q4 2025 | 138 | $1.01B |
| Q3 2025 | 102 | $353.6M |
| Q2 2025 | 89 | $148.9M |
| Q1 2025 | 92 | $151.0M |
| Q4 2024 | 101 | $171.9M |
| Q3 2024 | 96 | $139.3M |
| Q2 2024 | 88 | $137.9M |
| Q1 2024 | 126 | $1.34B |
| Q4 2023 | 126 | $1.54B |
| Q3 2023 | 111 | $716.1M |
| Q2 2023 | 107 | $935.2M |
| Q1 2023 | 108 | $691.6M |
| Q4 2022 | 116 | $886.0M |
| Q3 2022 | 102 | $512.2M |
| Q2 2022 | 100 | $297.3M |
| Q1 2022 | 99 | $548.0M |
| Q4 2021 | 101 | $1.01B |
| Q3 2021 | 66 | $681.6M |
| Q2 2021 | 61 | $538.8M |
| Q1 2021 | 55 | $326.3M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Inhibrx Biosciences, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Franklin Resources Inc | 34,207 | $2.30M | 0.00% | +4,899+16.7% | Added |
| ArrowMark Colorado Holdings LLC | 35,176 | $2.36M | 0.06% | 00.0% | Unchanged |
| Jefferies Financial Group Inc. | 38,973 | $2.62M | 0.03% | +30,072+337.8% | Added |
| Voleon Capital Management LP | 39,305 | $2.64M | 0.06% | +24,297+161.9% | Added |
| UBS Group AG | 48,137 | $3.24M | 0.00% | −25,562−34.7% | Reduced |
| Renaissance Technologies LLC | 50,183 | $3.37M | 0.01% | −2,417−4.6% | Reduced |
| FMR LLC | 52,808 | $3.55M | 0.00% | +6,539+14.1% | Added |
| Citigroup Inc | 62,516 | $4.20M | 0.00% | +6,757+12.1% | Added |
| Vanguard Fiduciary Trust Co | 64,322 | $4.32M | 0.00% | +64,322 | New |
| Vanguard Portfolio Management LLC | 72,460 | $4.87M | 0.00% | +72,460 | New |
| Kennedy Capital Management, Inc. | 72,812 | $4.90M | 0.10% | +1,324+1.9% | Added |
| D. E. Shaw & Co., Inc. | 77,437 | $5.21M | 0.00% | −44,664−36.6% | Reduced |
| Northern Trust Corp | 93,696 | $6.30M | 0.00% | +5,187+5.9% | Added |
| Goldman Sachs Group Inc | 95,074 | $6.39M | 0.00% | −5,543−5.5% | Reduced |
| Susquehanna International Group, LLP | 97,873 | $6.58M | 0.01% | −199,243−67.1% | Reduced |
| CDC Financial, Inc. | 124,530 | $8.37M | 6.93% | +13,720+12.4% | Added |
| Capitolis Liquid Global Markets LLC | 125,000 | $8.40M | 0.05% | +125,000 | New |
| Soleus Capital Management, L.P. | 131,000 | $8.81M | 0.36% | +106,000+424.0% | Added |
| SummitTX Capital, L.P. | 137,821 | $9.27M | 0.30% | +54,936+66.3% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 170,700 | $11.5M | 0.02% | −93,300−35.3% | Reduced |
| Geode Capital Management, LLC | 231,509 | $15.6M | 0.00% | +5,500+2.4% | Added |
| Schonfeld Strategic Advisors LLC | 254,827 | $17.1M | 0.14% | +40,102+18.7% | Added |
| PFM Health Sciences, LP | 305,431 | $20.5M | 2.16% | +39,914+15.0% | Added |
| Millennium Management LLC | 327,860 | $22.0M | 0.02% | +51,943+18.8% | Added |
| Woodline Partners LP | 384,433 | $25.8M | 0.10% | +244,954+175.6% | Added |
| Capital Research Global Investors | 392,847 | $26.4M | 0.00% | −28,728−6.8% | Reduced |
| Sofinnova Investments, Inc. | 406,029 | $27.3M | 1.37% | −48,628−10.7% | Reduced |
| Vanguard Capital Management LLC | 486,422 | $32.7M | 0.00% | +486,422 | New |
| State Street Corp | 550,845 | $37.0M | 0.00% | +175,884+46.9% | Added |
| BlackRock, Inc. | 798,898 | $53.7M | 0.00% | +21,515+2.8% | Added |
| HighTower Advisors, LLC | 870,200 | $58.5M | 0.06% | −3070.0% | Reduced |
| Sanofi | 1,157,926 | $77.8M | 23.17% | 00.0% | Unchanged |
| Morgan Stanley | 1,263,078 | $84.9M | 0.01% | +95,350+8.2% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 1,437,705 | $96.7M | 0.27% | 00.0% | Unchanged |
| Perceptive Advisors LLC | 1,442,707 | $97.0M | 1.92% | −10,000−0.7% | Reduced |
| Caligan Partners LP | 0 | $0 | 0.00% | −323,565−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −92,009−100.0% | Sold out |
| Laird Norton Trust Company, LLC | 0 | $0 | 0.00% | −40,382−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −25,390−100.0% | Sold out |
| Acuta Capital Partners, LLC | 0 | $0 | 0.00% | −16,377−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −16,088−100.0% | Sold out |
| Groupe la Francaise | 0 | $0 | 0.00% | −15,636−100.0% | Sold out |
| Mariner, LLC | 0 | $0 | 0.00% | −12,746−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −12,098−100.0% | Sold out |
| Credit Industriel Et Commercial | 0 | $0 | 0.00% | −8,656−100.0% | Sold out |
| Belvedere Trading LLC | 0 | $0 | 0.00% | −7,402−100.0% | Sold out |
| Birchview Capital, LP | 0 | $0 | 0.00% | −3,698−100.0% | Sold out |
| Intech Investment Management LLC | 0 | $0 | 0.00% | −3,242−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −3,051−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −2,192−100.0% | Sold out |
| Hurley Capital, LLC | 0 | $0 | 0.00% | −1,660−100.0% | Sold out |
| Diadema Partners LP | 0 | $0 | 0.00% | −1,299−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −1,145−100.0% | Sold out |
| Natixis | 0 | $0 | 0.00% | −889−100.0% | Sold out |
| Daiwa Securities Group Inc. | 0 | $0 | 0.00% | −841−100.0% | Sold out |
| Persistent Asset Partners Ltd | 0 | $0 | 0.00% | −346−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −285−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −121−100.0% | Sold out |
| SageView Advisory Group, LLC | 0 | $0 | 0.00% | −28−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −17−100.0% | Sold out |
| Rockefeller Capital Management L.P. | 0 | $0 | 0.00% | −13−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |