Assembly Biosciences, Inc.
ASMB- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001426800
No open-market purchases or sales by Assembly Biosciences, Inc. insiders were filed in the last 90 days; 92 institutions reported holding it in 13F filings for Q2 2026, worth $514.8M in total; no superinvestor holds it.
13F holders, Q2 2025
Institutional positions in Assembly Biosciences, Inc. as of Jun 30, 2025. 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
- 33
- −4 vs. Q1 2025
- Shares held
- 3.15M
- −27.1K (−0.9%) vs. Q1 2025
- Total value
- $57.1M
- +$26.7M (+87.9%) vs. Q1 2025
- New holders
- 5
- 7 more added
- Sold out
- 9
- 8 more reduced
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ASMB 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 | 92 | $514.8M |
| Q1 2026 | 75 | $381.5M |
| Q4 2025 | 69 | $466.7M |
| Q3 2025 | 57 | $324.9M |
| Q2 2025 | 33 | $57.1M |
| Q1 2025 | 37 | $30.4M |
| Q4 2024 | 35 | $50.3M |
| Q3 2024 | 30 | $15.6M |
| Q2 2024 | 27 | $16.1M |
| Q1 2024 | 24 | $8.68M |
| Q4 2023 | 45 | $7.12M |
| Q3 2023 | 32 | $8.62M |
| Q2 2023 | 32 | $12.0M |
| Q1 2023 | 38 | $11.1M |
| Q4 2022 | 40 | $18.4M |
| Q3 2022 | 50 | $27.2M |
| Q2 2022 | 54 | $36.1M |
| Q1 2022 | 54 | $39.3M |
| Q4 2021 | 62 | $54.3M |
| Q3 2021 | 65 | $79.0M |
| Q2 2021 | 91 | $105.1M |
| Q1 2021 | 107 | $133.6M |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Assembly Biosciences, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Gilead Sciences, Inc. | 2,209,471 | $40.0M | 3.13% | 00.0% | Unchanged |
| Vanguard Group Inc | 253,825 | $4.60M | 0.00% | +37,842+17.5% | Added |
| B Group, Inc. | 189,350 | $3.43M | 2.96% | −10,650−5.3% | Reduced |
| Renaissance Technologies LLC | 107,521 | $1.95M | 0.00% | −5,790−5.1% | Reduced |
| BlackRock, Inc. | 89,672 | $1.62M | 0.00% | +10,684+13.5% | Added |
| Geode Capital Management, LLC | 51,015 | $924.6K | 0.00% | +3,312+6.9% | Added |
| Monimus Capital Management, LP | 42,067 | $762.3K | 0.61% | 00.0% | Unchanged |
| Citadel Advisors LLC | 35,725 | $647.3K | 0.00% | +23,467+191.4% | Added |
| Northern Trust Corp | 28,075 | $508.7K | 0.00% | −248−0.9% | Reduced |
| Federated Hermes, Inc. | 25,394 | $460.1K | 0.00% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 20,421 | $369.0K | 0.00% | −2,606−11.3% | Reduced |
| Palumbo Wealth Management LLC | 18,667 | $338.2K | 0.10% | +681+3.8% | Added |
| Bridgeway Capital Management, LLC | 15,225 | $275.9K | 0.01% | 00.0% | Unchanged |
| Gsa Capital Partners LLP | 14,840 | $269.0K | 0.02% | +14,840 | New |
| State Street Corp | 14,009 | $253.8K | 0.00% | 00.0% | Unchanged |
| Man Group plc | 13,227 | $239.7K | 0.00% | −4,725−26.3% | Reduced |
| Lynx1 Capital Management LP | 10,366 | $187.8K | 0.05% | +10,366 | New |
| UBS Group AG | 2,933 | $53.1K | 0.00% | +2,166+282.4% | Added |
| Barclays PLC | 2,779 | $50.4K | 0.00% | −652−19.0% | Reduced |
| Morgan Stanley | 2,149 | $38.9K | 0.00% | −151−6.6% | Reduced |
| BNP Paribas Arbitrage, SA | 302 | $5.47K | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 260 | $4.71K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 250 | $4.53K | 0.00% | −111−30.7% | Reduced |
| Raymond James Financial Inc | 250 | $4.53K | 0.00% | +250 | New |
| Rhumbline Advisers | 190 | $3.44K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 145 | $2.63K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 106 | $2.00K | 0.00% | +106 | New |
| Ameriflex Group, Inc. | 83 | $1.42K | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 67 | $1.21K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 55 | $997 | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 52 | $942 | 0.00% | +13+33.3% | Added |
| Caitong International Asset Management Co., Ltd | 34 | $616 | 0.00% | +34 | New |
| JPMorgan Chase & Co | 7 | $127 | 0.00% | 00.0% | Unchanged |
| Armistice Capital, LLC | 0 | $0 | 0.00% | −23,858−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −18,982−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −18,040−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −17,414−100.0% | Sold out |
| American Century Companies Inc | 0 | $0 | 0.00% | −11,799−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −10,182−100.0% | Sold out |
| FMR LLC | 0 | $0 | 0.00% | −5,659−100.0% | Sold out |
| Frazier Financial Advisors, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Avion Wealth | 0 | $0 | 0.00% | −33−100.0% | Sold out |