ASMB Assembly Biosciences, Inc.
Assembly Biosciences, Inc. (ASMB) Institutional Ownership
What the institutions did with ASMB last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| GILEAD SCIENCES, INC. | 5.0M | 26.5% |
| FARALLON CAPITAL MANAGEMENT LLC | 1.6M | 8.6% |
| Paradigm Biocapital Advisors LP | 1.6M | 8.3% |
| Commodore Capital LP | 1.4M | 7.5% |
| RA CAPITAL MANAGEMENT, L.P. | 1.0M | 5.4% |
| Jupiter Topco LLC | 849.3K | 4.5% |
| BlackRock, Inc. | 766.8K | 4.1% |
| Parkman Healthcare Partners LLC | 721.2K | 3.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 558.9K | 3.0% |
| Point72 Asset Management, L.P. | 460.6K | 2.5% |
| Seven Fleet Capital Management LP | 433.1K | 2.3% |
| MILLENNIUM MANAGEMENT LLC | 298.8K | 1.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 280.4K | 1.5% |
| Schonfeld Strategic Advisors LLC | 242.2K | 1.3% |
| AMERIPRISE FINANCIAL INC | 230.0K | 1.2% |
| DV EQUITIES, LLC | 226.4K | 1.2% |
| Aberdeen Group plc | 207.0K | 1.1% |
| Affinity Asset Advisors, LLC | 190.0K | 1.0% |
| B Group, Inc. | 175.7K | 0.9% |
| STATE STREET CORP | 171.9K | 0.9% |
| STEMPOINT CAPITAL LP | 170.4K | 0.9% |
| Squadron Capital Management LLC | 160.0K | 0.9% |
| Woodline Partners LP | 150.8K | 0.8% |
| Driehaus Capital Management LLC | 150.0K | 0.8% |
| Ally Bridge Group (NY) LLC | 140.0K | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Paradigm Biocapital Advisors LP | Increased | 665.3K | 1.6M | +888.5K |
| BlackRock, Inc. | Increased | 202.7K | 766.8K | +564.1K |
| GILEAD SCIENCES, INC. | Increased | 4.5M | 5.0M | +471.7K |
| Commodore Capital LP | Increased | 1.0M | 1.4M | +415.0K |
| Seven Fleet Capital Management LP | Increased | 56.1K | 433.1K | +377.0K |
| FARALLON CAPITAL MANAGEMENT LLC | Increased | 1.2M | 1.6M | +377.0K |
| Parkman Healthcare Partners LLC | Increased | 411.2K | 721.2K | +310.0K |
| Blackstone Inc. | Sold Out | 296.9K | 0 | -296.9K |
| AMERIPRISE FINANCIAL INC | New | 0 | 230.0K | +230.0K |
| Aberdeen Group plc | New | 0 | 207.0K | +207.0K |
| STEMPOINT CAPITAL LP | Reduced | 370.9K | 170.4K | -200.5K |
| Affinity Asset Advisors, LLC | New | 0 | 190.0K | +190.0K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Sold Out | 161.0K | 0 | -161.0K |
| Squadron Capital Management LLC | New | 0 | 160.0K | +160.0K |
| Woodline Partners LP | New | 0 | 150.8K | +150.8K |
| Driehaus Capital Management LLC | New | 0 | 150.0K | +150.0K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 133.0K | 280.4K | +147.5K |
| MARSHALL WACE, LLP | Reduced | 163.4K | 17.7K | -145.7K |
| Ally Bridge Group (NY) LLC | New | 0 | 140.0K | +140.0K |
| Patient Square Capital LP | Sold Out | 136.3K | 0 | -136.3K |
| Schonfeld Strategic Advisors LLC | Increased | 120.5K | 242.2K | +121.7K |
| Point72 Asset Management, L.P. | Increased | 344.1K | 460.6K | +116.5K |
| STATE STREET CORP | Increased | 56.7K | 171.9K | +115.2K |
| FRANKLIN RESOURCES INC | New | 0 | 113.2K | +113.2K |
| GOLDMAN SACHS GROUP INC | Increased | 36.2K | 137.8K | +101.6K |
| NORTHERN TRUST CORP | Increased | 41.0K | 123.0K | +82.0K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 17.7K | 91.2K | +73.4K |
| CITADEL ADVISORS LLC | Increased | 25.4K | 95.9K | +70.5K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 490.4K | 558.9K | +68.5K |
| MILLENNIUM MANAGEMENT LLC | Increased | 233.7K | 298.8K | +65.2K |
| Caption Management, LLC | Reduced | 81.8K | 22.8K | -59.0K |
| UBS Group AG | Increased | 364 | 41.8K | +41.4K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Sold Out | 39.4K | 0 | -39.4K |
| JANE STREET GROUP, LLC | Sold Out | 34.5K | 0 | -34.5K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Sold Out | 32.9K | 0 | -32.9K |
| XTX Topco Ltd | Increased | 10.8K | 42.9K | +32.1K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | New | 0 | 29.1K | +29.1K |
| 683 Capital Management, LLC | Sold Out | 27.9K | 0 | -27.9K |
| WELLINGTON MANAGEMENT GROUP LLP | Sold Out | 26.5K | 0 | -26.5K |
| Eversept Partners, LP | Reduced | 40.9K | 16.5K | -24.4K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 149 | 24.2K | +24.1K |
| Bank of New York Mellon Corp | New | 0 | 24.0K | +24.0K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 15.7K | 39.4K | +23.8K |
| Trexquant Investment LP | Increased | 22.7K | 45.7K | +22.9K |
| BARCLAYS PLC | Reduced | 27.1K | 6.1K | -20.9K |
| FEDERATED HERMES, INC. | Sold Out | 18.9K | 0 | -18.9K |
| Qube Research & Technologies Ltd | Reduced | 69.3K | 51.5K | -17.8K |
| HSBC HOLDINGS PLC | New | 0 | 16.9K | +16.9K |
| Nuveen, LLC | New | 0 | 16.9K | +16.9K |
| Hudson Bay Capital Management LP | Sold Out | 16.8K | 0 | -16.8K |
| MORGAN STANLEY | Increased | 33.1K | 45.2K | +12.2K |
| Invesco Ltd. | New | 0 | 11.9K | +11.9K |
| RHUMBLINE ADVISERS | Increased | 190 | 11.6K | +11.4K |
| Jump Financial, LLC | Sold Out | 10.9K | 0 | -10.9K |
| Squarepoint Ops LLC | Increased | 23.8K | 34.2K | +10.4K |
| Integrated Quantitative Investments LLC | New | 0 | 10.1K | +10.1K |
| DEUTSCHE BANK AG\ | New | 0 | 9.6K | +9.6K |
| Engineers Gate Manager LP | Increased | 9.4K | 17.8K | +8.3K |
| WELLS FARGO & COMPANY/MN | New | 0 | 8.3K | +8.3K |
| PRICE T ROWE ASSOCIATES INC /MD/ | New | 0 | 8.2K | +8.2K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.