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, Q4 2025
Institutional positions in Assembly Biosciences, Inc. as of Dec 31, 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
- 69
- +14 vs. Q3 2025
- Shares held
- 13.7M
- +1.26M (+10.1%) vs. Q3 2025
- Total value
- $466.7M
- +$142.2M (+43.8%) vs. Q3 2025
- New holders
- 22
- 23 more added
- Sold out
- 8
- 13 more reduced
2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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 | $376.4M |
| Q4 2025 | 69 | $466.7M |
| Q3 2025 | 57 | $324.9M |
| Q2 2025 | 33 | $57.0M |
| Q1 2025 | 37 | $30.4M |
| Q4 2024 | 35 | $50.3M |
| Q3 2024 | 30 | $15.5M |
| Q2 2024 | 27 | $16.1M |
| Q1 2024 | 24 | $8.61M |
| Q4 2023 | 45 | $7.09M |
| Q3 2023 | 32 | $8.44M |
| Q2 2023 | 32 | $12.0M |
| Q1 2023 | 38 | $10.1M |
| Q4 2022 | 40 | $18.4M |
| Q3 2022 | 50 | $27.2M |
| Q2 2022 | 54 | $36.1M |
| Q1 2022 | 54 | $39.3M |
| Q4 2021 | 62 | $53.8M |
| Q3 2021 | 65 | $79.0M |
| Q2 2021 | 91 | $105.1M |
| Q1 2021 | 107 | $133.6M |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Assembly Biosciences, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BNP Paribas Arbitrage, SA | 2 | $68 | 0.00% | −56−96.6% | Reduced |
| Quadrant Capital Group LLC | 22 | $749 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 32 | $1.09K | 0.00% | +32 | New |
| EverSource Wealth Advisors, LLC | 55 | $1.87K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 59 | $2.01K | 0.00% | +59 | New |
| Advisor Group Holdings, Inc. | 100 | $3.40K | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 154 | $5.24K | 0.00% | +154 | New |
| Rhumbline Advisers | 190 | $6.46K | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 260 | $8.84K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 607 | $20.6K | 0.00% | +607 | New |
| Citigroup Inc | 2,201 | $74.9K | 0.00% | +2,201 | New |
| Canada Pension Plan Investment Board | 3,500 | $119.0K | 0.00% | +3,500 | New |
| Bank of America Corp | 5,110 | $173.8K | 0.00% | +1,739+51.6% | Added |
| Charles Schwab Investment Management Inc | 6,704 | $228.0K | 0.00% | +6,704 | New |
| Virtus Investment Advisers, Inc. | 7,369 | $250.6K | 0.07% | +7,369 | New |
| Renaissance Technologies LLC | 9,240 | $314.3K | 0.00% | −144,371−94.0% | Reduced |
| UBS Group AG | 9,779 | $332.6K | 0.00% | −5,984−38.0% | Reduced |
| Engineers Gate Manager LP | 10,375 | $352.9K | 0.00% | +10,375 | New |
| Acadian Asset Management LLC | 12,446 | $422.0K | 0.00% | −10,844−46.6% | Reduced |
| Gsa Capital Partners LLP | 12,699 | $432.0K | 0.04% | +279+2.2% | Added |
| Raymond James Financial Inc | 13,082 | $444.9K | 0.00% | +13,082 | New |
| Susquehanna Portfolio Strategies, LLC | 13,903 | $472.8K | 0.01% | +13,903 | New |
| Hudson Bay Capital Management LP | 15,050 | $511.9K | 0.00% | +15,050 | New |
| Omers Administration Corp | 15,598 | $530.5K | 0.00% | +15,598 | New |
| SEI Investments Co | 17,745 | $603.5K | 0.00% | +17,745 | New |
| ADAR1 Capital Management, LLC | 19,747 | $671.6K | 0.05% | +800+4.2% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 20,802 | $707.5K | 0.00% | +9,646+86.5% | Added |
| Morgan Stanley | 22,534 | $766.4K | 0.00% | +19,007+538.9% | Added |
| Barclays PLC | 24,741 | $841.4K | 0.00% | +20,780+524.6% | Added |
| Federated Hermes, Inc. | 25,394 | $863.6K | 0.00% | 00.0% | Unchanged |
| Ellsworth Advisors, LLC | 29,735 | $889.4K | 0.18% | −215−0.7% | Reduced |
| 683 Capital Management, LLC | 27,863 | $947.6K | 0.08% | +27,863 | New |
| Trexquant Investment LP | 28,276 | $961.7K | 0.01% | +15,750+125.7% | Added |
| EAM Investors, LLC | 29,523 | $1.00M | 0.11% | +451+1.6% | Added |
| Citadel Advisors LLC | 32,866 | $1.12M | 0.00% | −21,012−39.0% | Reduced |
| Goldman Sachs Group Inc | 34,794 | $1.18M | 0.00% | +17,138+97.1% | Added |
| Palumbo Wealth Management LLC | 37,305 | $1.27M | 0.31% | +2,507+7.2% | Added |
| Arrowstreet Capital, Limited Partnership | 37,812 | $1.29M | 0.00% | +37,812 | New |
| Monimus Capital Management, LP | 38,301 | $1.30M | 0.86% | −3,766−9.0% | Reduced |
| Northern Trust Corp | 41,227 | $1.40M | 0.00% | +1,272+3.2% | Added |
| Qube Research & Technologies Ltd | 42,185 | $1.43M | 0.00% | +31,155+282.5% | Added |
| JPMorgan Chase & Co | 48,159 | $1.64M | 0.00% | +48,152+687,885.7% | Added |
| State Street Corp | 52,989 | $1.80M | 0.00% | +8,175+18.2% | Added |
| Jane Street Group, LLC | 53,702 | $1.83M | 0.00% | +19,874+58.8% | Added |
| Schonfeld Strategic Advisors LLC | 54,235 | $1.84M | 0.01% | −67,653−55.5% | Reduced |
| Superstring Capital Management LP | 65,273 | $2.22M | 1.19% | +65,273 | New |
| Seven Fleet Capital Management LP | 73,762 | $2.51M | 1.70% | +73,762 | New |
| Susquehanna International Group, LLP | 80,394 | $2.73M | 0.00% | −50,632−38.6% | Reduced |
| Millennium Management LLC | 98,221 | $3.34M | 0.00% | +76,613+354.6% | Added |
| Caption Management, LLC | 106,591 | $3.63M | 0.16% | +106,591 | New |
| Patient Square Capital LP | 127,000 | $4.32M | 0.92% | −8,182−6.1% | Reduced |
| Marshall Wace, LLP | 129,075 | $4.39M | 0.00% | +43,860+51.5% | Added |
| Geode Capital Management, LLC | 131,307 | $4.47M | 0.00% | +1,212+0.9% | Added |
| StemPoint Capital LP | 156,728 | $5.33M | 0.91% | +90,598+137.0% | Added |
| Eversept Partners, LP | 159,676 | $5.43M | 0.30% | +159,676 | New |
| Adage Capital Partners GP, L.L.C. | 161,000 | $5.48M | 0.01% | +161,000 | New |
| B Group, Inc. | 175,706 | $5.98M | 4.43% | 00.0% | Unchanged |
| BlackRock, Inc. | 192,296 | $6.54M | 0.00% | +22,097+13.0% | Added |
| Franklin Resources Inc | 210,528 | $7.16M | 0.00% | −27,641−11.6% | Reduced |
| Parkman Healthcare Partners LLC | 249,357 | $8.48M | 0.81% | −1,624−0.6% | Reduced |
| Blackstone Group Inc. | 318,754 | $10.8M | 0.05% | −129,035−28.8% | Reduced |
| Vanguard Group Inc | 572,898 | $19.5M | 0.00% | +70,786+14.1% | Added |
| Point72 Asset Management, L.P. | 600,609 | $20.4M | 0.03% | +304,592+102.9% | Added |
| Paradigm Biocapital Advisors LP | 665,251 | $22.6M | 0.61% | +665,251 | New |
| Janus Henderson Group PLC | 837,925 | $28.5M | 0.01% | +85,299+11.3% | Added |
| Commodore Capital LP | 1,000,000 | $34.0M | 2.26% | 00.0% | Unchanged |
| Ra Capital Management, L.P. | 1,020,410 | $34.7M | 0.36% | 00.0% | Unchanged |
| Farallon Capital Management, L.L.C. | 1,227,590 | $41.8M | 0.22% | 00.0% | Unchanged |
| Gilead Sciences, Inc. | 4,505,391 | $153.2M | 7.92% | 00.0% | Unchanged |
| Frazier Life Sciences Management, L.P. | 0 | $0 | 0.00% | −456,249−100.0% | Sold out |
| MPM Oncology Impact Management LP | 0 | $0 | 0.00% | −39,665−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −24,501−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −17,935−100.0% | Sold out |
| Bridgeway Capital Management, LLC | 0 | $0 | 0.00% | −15,225−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −12,806−100.0% | Sold out |
| Wells Fargo & Company | 0 | $0 | 0.00% | −145−100.0% | Sold out |
| SBI Securities Co., Ltd. | 0 | $0 | 0.00% | −68−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | – | – | – | – | Not filed |
| Point72 Europe (London) LLP | – | – | – | – | Not filed |