Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in INBX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | PERCEPTIVE ADVISORS LLC | 1.4M | $97.0M | -0.7% | 9.834% | 1.92% |
| 2 | VIKING GLOBAL INVESTORS LP | 1.4M | $96.7M | 0.0% | 9.800% | 0.27% |
| 3 | MORGAN STANLEY | 1.3M | $84.9M | +8.2% | 8.609% | 0.01% |
| 4 | Sanofi | 1.2M | $77.8M | 0.0% | 7.892% | 23.17% |
| 5 | HighTower Advisors, LLC | 870K | $58.5M | -0.0% | 5.931% | 0.06% |
| 6 | BlackRock, Inc. | 799K | $53.7M | +2.8% | 5.445% | 0.00% |
| 7 | STATE STREET CORP | 551K | $37.0M | +46.9% | 3.755% | 0.00% |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 486K | $32.7M | β | 3.315% | 0.00% |
| 9 | Sofinnova Investments, Inc. | 406K | $27.3M | -10.7% | 2.768% | 1.43% |
| 10 | Capital Research Global Investors | 393K | $26.4M | -6.8% | 2.678% | 0.00% |
| 11 | Woodline Partners LP | 384K | $25.8M | +175.6% | 2.620% | 0.10% |
| 12 | MILLENNIUM MANAGEMENT LLC | 328K | $22.0M | +18.8% | 2.235% | 0.01% |
| 13 | PFM Health Sciences, LP | 305K | $20.5M | +15.0% | 2.082% | 2.05% |
| 14 | Schonfeld Strategic Advisors LLC | 255K | $17.1M | +18.7% | 1.737% | 0.13% |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | 232K | $15.6M | +2.4% | 1.578% | 0.00% |
| 16 | CDC Financial, Inc. | 187K | $12.5M | +68.3% | 1.271% | 9.30% |
| 17 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 171K | $11.5M | -35.3% | 1.163% | 0.02% |
| 18 | GOLDMAN SACHS GROUP INC | 162K | $10.9M | -3.3% | 1.101% | 0.00% |
| 19 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 157K | $10.6M | -75.1% | 1.073% | 0.00% |
| 20 | SummitTX Capital, L.P. | 138K | $9.3M | +66.3% | 0.939% | 0.29% |
| 21 | Soleus Capital Management, L.P. | 131K | $8.8M | +424.0% | 0.893% | 0.36% |
| 22 | CAPITOLIS LIQUID GLOBAL MARKETS LLC | 125K | $8.4M | β | 0.852% | 0.05% |
| 23 | D. E. Shaw & Co., Inc. | 100K | $6.7M | -30.9% | 0.682% | 0.01% |
| 24 | NORTHERN TRUST CORP | 94K | $6.3M | +5.9% | 0.639% | 0.00% |
| 25 | KENNEDY CAPITAL MANAGEMENT, INC. | 73K | $4.9M | +1.8% | 0.496% | 0.10% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in INBX β a direct measure of their conviction.
Filings activity in INBX during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new INBX position in Q1 2026
Institutions that fully closed their INBX position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 132 | 2.2% | 64.36% | 14.46 pp | $871M | 18% |
| Q4 2025 | 135 | +36% | 78.82% | +52.78 pp | $1.07B | +203% |
| Q3 2025 | 99 | +11% | 26.04% | +15.20 pp | $352M | +140% |
| Q2 2025 | 89 | 5.3% | 10.84% | 0.18 pp | $147M | 1.6% |
| Q1 2025 | 94 | 6.0% | 11.02% | 1.43 pp | $149M | 12% |
| Q4 2024 | 100 | +3.1% | 12.45% | +2.16 pp | $168M | +21% |
| Q3 2024 | 97 | +13% | 10.29% | +0.12 pp | $139M | +1.2% |
| Q2 2024 | 86 | β | 10.17% | β | $138M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying INBX stock.
Based on Q1 2026 13F filings, institutional ownership of Inhibrx Biosciences, Inc. stands at 64.4%, held across 132 reporting institutions.
PERCEPTIVE ADVISORS LLC is the largest reported institutional holder of INBX, with approximately 1,442,707 shares worth $0.10B as of Q1 2026.
Yes β 3 widely-followed marquee investors appear among the top 25 institutional holders of INBX, including VIKING GLOBAL INVESTORS LP, MILLENNIUM MANAGEMENT LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for INBX is 46 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
25 institutions opened new positions in INBX during Q1 2026, while 28 fully exited. 28 added to existing positions and 78 trimmed.
INBX institutional ownership fell by 14.46 percentage points quarter-over-quarter, with a net change of -3 holders.
The top 10 institutions account for 68.0% of all reported 13F value in INBX, and the top 25 account for 89.9%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Inhibrx Biosciences, Inc. (INBX) Institutional Ownership