Perceptive Advisors INBX Position
Active4-Fund ConvergencePerceptive Advisors increased their position in Inhibrx Biosciences, Inc. (INBX) in Q4 2025, holding $114.8M worth of shares across 1,452,707 shares.
The position was first reported in Q1 2023 and has been tracked across 12 quarterly 13F filings.
INBX is a convergence signal: 4 specialist biotech funds hold this stock, suggesting high institutional conviction.
There is an upcoming Phase 2 readout for INBRX-106 - Hexavalent OX40 agonist antibody in 197 days (Oct 30, 2026), making the timing of Perceptive's position particularly relevant.
Short interest stands at 17.5% of float with 11.2 days to cover, indicating significant bearish positioning against Perceptive's long thesis.
About Inhibrx Biosciences, Inc.
Inhibrx Biosciences, Inc., a clinical-stage biopharmaceutical company, engages in the development of biologic therapeutics for people with life-threatening conditions. Its therapeutic candidates includes INBRX-109, a tetravalent therapeutic candidate targeting death-receptor 5 that is in phase 2 clinical trial for the treatment of unresectable or metastatic conventional chondrosarcoma; and INBRX-106, a hexavalent sdAb-based therapeutic candidate targeting OX4 that is in phase 2 clinical trial for the treatment of metastatic solid tumor, non-small cell lung cancer, melanoma, head and neck cancer, gastric (GIST) and gastroesophageal adenocarcinoma (GEA) cancer, renal cell carcinoma, and urothelial (transitional) cell carcinoma. The company was incorporated in 2024 and is based in La Jolla, California.
Full company profile →Short Interest
17.5%
11.2 days to cover
Perceptive Advisors INBX Position History
| Quarter | Action | Shares | Change | Value |
|---|---|---|---|---|
| Q4 2025 | Increased | 1,452,707 | +125,000 | $114.8M |
| Q3 2025 | Increased | 1,327,707 | +349,815 | $44.7M |
| Q2 2025 | Decreased | 977,892 | -86,134 | $14.0M |
| Q1 2025 | Held | 1,064,026 | — | $14.9M |
| Q4 2024 | Held | 1,064,026 | — | $16.4M |
| Q3 2024 | Held | 1,064,026 | — | $16.7M |
| Q2 2024 | Decreased | 1,064,026 | -3,192,078 | $15.1M |
| Q1 2024 | Held | 4,256,104 | — | $148.8M |
| Q4 2023 | Held | 4,256,104 | — | $161.7M |
| Q3 2023 | Increased | 4,256,104 | +631,922 | $78.1M |
| Q2 2023 | Increased | 3,624,182 | +8,799 | $94.1M |
| Q1 2023 | New | 3,615,383 | +3,615,383 | $68.2M |
Frequently Asked Questions
Does Perceptive Advisors own INBX?
Yes. As of Q4 2025, Perceptive Advisors holds 1,452,707 shares of Inhibrx Biosciences, Inc. (INBX) valued at $114.8M. This data comes from their SEC 13F filing.
How many hedge funds own INBX?
4 specialist biotech hedge funds currently hold INBX, including RA Capital Management, Tang Capital Management, Eventide Asset Management. When 3 or more specialist funds hold the same stock, BiotechEdge flags it as a convergence signal.
When did Perceptive Advisors first buy INBX?
Perceptive Advisors's position in INBX was first reported in Q1 2023. 13F filings are reported with a 45-day delay, so the actual purchase may have occurred earlier in the quarter.
Is Perceptive Advisors's INBX position increasing or decreasing?
Perceptive Advisors increased their INBX position in the most recent quarter, adding 125,000 shares.
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