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 2026
Institutional positions in Assembly Biosciences, Inc. as of Jun 30, 2026. 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
- 92
- +18 vs. Q1 2026
- Shares held
- 18.7M
- +5.84M (+45.3%) vs. Q1 2026
- Total value
- $514.8M
- +$156.8M (+43.8%) vs. Q1 2026
- New holders
- 33
- 35 more added
- Sold out
- 15
- 17 more reduced
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Assembly Biosciences, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Gilead Sciences, Inc. | 4,977,089 | $136.8M | 8.30% | +471,698+10.5% | Added |
| Farallon Capital Management, L.L.C. | 1,604,590 | $44.1M | 0.26% | +377,000+30.7% | Added |
| Paradigm Biocapital Advisors LP | 1,553,748 | $42.7M | 0.80% | +888,497+133.6% | Added |
| Commodore Capital LP | 1,415,000 | $38.9M | 2.32% | +415,000+41.5% | Added |
| Ra Capital Management, L.P. | 1,020,410 | $28.0M | 0.24% | 00.0% | Unchanged |
| Jupiter Topco LLC | 849,309 | $23.4M | 0.01% | +849,309 | New |
| BlackRock, Inc. | 766,819 | $21.1M | 0.00% | +564,076+278.2% | Added |
| Parkman Healthcare Partners LLC | 721,181 | $19.8M | 2.04% | +309,954+75.4% | Added |
| Vanguard Capital Management LLC | 558,942 | $15.4M | 0.00% | +68,495+14.0% | Added |
| Point72 Asset Management, L.P. | 460,593 | $12.7M | 0.02% | +116,488+33.9% | Added |
| Seven Fleet Capital Management LP | 433,147 | $11.9M | 1.96% | +377,000+671.5% | Added |
| Millennium Management LLC | 298,807 | $8.21M | 0.01% | +65,157+27.9% | Added |
| Geode Capital Management, LLC | 280,424 | $7.71M | 0.00% | +147,453+110.9% | Added |
| Schonfeld Strategic Advisors LLC | 242,153 | $6.65M | 0.04% | +121,653+101.0% | Added |
| Ameriprise Financial Inc | 230,000 | $6.32M | 0.00% | +230,000 | New |
| DV Equities, LLC | 226,415 | $6.22M | 0.90% | +226,415 | New |
| Standard Life Aberdeen plc | 207,047 | $5.69M | 0.01% | +207,047 | New |
| Affinity Asset Advisors, LLC | 190,000 | $5.22M | 0.26% | +190,000 | New |
| B Group, Inc. | 175,706 | $4.83M | 2.74% | 00.0% | Unchanged |
| State Street Corp | 171,931 | $4.72M | 0.00% | +115,242+203.3% | Added |
| StemPoint Capital LP | 170,378 | $4.68M | 0.81% | −200,492−54.1% | Reduced |
| Squadron Capital Management LLC | 160,000 | $4.40M | 1.51% | +160,000 | New |
| Woodline Partners LP | 150,780 | $4.14M | 0.01% | +150,780 | New |
| Driehaus Capital Management LLC | 150,000 | $4.12M | 0.02% | +150,000 | New |
| Ally Bridge Group (NY) LLC | 140,000 | $3.85M | 4.96% | +140,000 | New |
| Goldman Sachs Group Inc | 137,833 | $3.79M | 0.00% | +101,628+280.7% | Added |
| Northern Trust Corp | 123,029 | $3.38M | 0.00% | +82,015+200.0% | Added |
| Franklin Resources Inc | 113,200 | $3.11M | 0.00% | +113,200 | New |
| Citadel Advisors LLC | 95,907 | $2.64M | 0.00% | +70,470+277.0% | Added |
| Vanguard Portfolio Management LLC | 91,153 | $2.50M | 0.00% | +73,430+414.3% | Added |
| Vanguard Fiduciary Trust Co | 73,970 | $2.03M | 0.00% | +2,364+3.3% | Added |
| HighVista Strategies LLC | 73,405 | $2.02M | 0.46% | −1,330−1.8% | Reduced |
| Qube Research & Technologies Ltd | 51,488 | $1.41M | 0.00% | −17,768−25.7% | Reduced |
| Monimus Capital Management, LP | 47,580 | $1.31M | 0.33% | −810−1.7% | Reduced |
| Trexquant Investment LP | 45,661 | $1.25M | 0.01% | +22,920+100.8% | Added |
| JPMorgan Chase & Co | 46,385 | $1.25M | 0.00% | −7,577−14.0% | Reduced |
| Morgan Stanley | 45,219 | $1.24M | 0.00% | +12,164+36.8% | Added |
| Gsa Capital Partners LLP | 42,931 | $1.18M | 0.07% | −2,118−4.7% | Reduced |
| XTX Topco Ltd | 42,918 | $1.18M | 0.02% | +32,133+297.9% | Added |
| UBS Group AG | 41,806 | $1.15M | 0.00% | +41,442+11,385.2% | Added |
| Renaissance Technologies LLC | 39,441 | $1.08M | 0.00% | +23,790+152.0% | Added |
| Squarepoint Ops LLC | 34,214 | $940.2K | 0.00% | +10,410+43.7% | Added |
| Charles Schwab Investment Management Inc | 29,128 | $800.4K | 0.00% | +29,128 | New |
| BNP Paribas Arbitrage, SA | 24,203 | $665.1K | 0.00% | +24,054+16,143.6% | Added |
| Bank of New York Mellon Corp | 24,015 | $659.9K | 0.00% | +24,015 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 23,765 | $653.1K | 0.00% | +2,004+9.2% | Added |
| Caption Management, LLC | 22,829 | $627.3K | 0.02% | −59,012−72.1% | Reduced |
| ADAR1 Capital Management, LLC | 20,447 | $561.9K | 0.03% | +500+2.5% | Added |
| Palumbo Wealth Management LLC | 19,865 | $545.9K | 0.11% | +222+1.1% | Added |
| Two Sigma Investments, LP | 17,858 | $490.7K | 0.00% | −2,692−13.1% | Reduced |
| Engineers Gate Manager LP | 17,766 | $488.2K | 0.01% | +8,343+88.5% | Added |
| Marshall Wace, LLP | 17,735 | $487.4K | 0.00% | −145,665−89.1% | Reduced |
| Nuveen, LLC | 16,875 | $463.7K | 0.00% | +16,875 | New |
| Eversept Partners, LP | 16,510 | $453.7K | 0.02% | −24,379−59.6% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 15,129 | $415.7K | 0.01% | +1,029+7.3% | Added |
| Virtus Investment Advisers, Inc. | 14,251 | $391.6K | 0.09% | +6,698+88.7% | Added |
| American Century Companies Inc | 13,239 | $363.8K | 0.00% | +4,085+44.6% | Added |
| Invesco Ltd. | 11,864 | $326.0K | 0.00% | +11,864 | New |
| Rhumbline Advisers | 11,590 | $318.5K | 0.00% | +11,400+6,000.0% | Added |
| Integrated Quantitative Investments LLC | 10,078 | $276.9K | 0.05% | +10,078 | New |
| Deutsche Bank AG | 9,615 | $264.2K | 0.00% | +9,615 | New |
| Bank of America Corp | 9,567 | $262.9K | 0.00% | −1,335−12.2% | Reduced |
| Canada Pension Plan Investment Board | 8,500 | $233.6K | 0.00% | 00.0% | Unchanged |
| EntryPoint Capital, LLC | 8,285 | $227.7K | 0.06% | −4,099−33.1% | Reduced |
| Wells Fargo & Company | 8,253 | $226.8K | 0.00% | +8,253 | New |
| Price T Rowe Associates Inc | 8,203 | $226.0K | 0.00% | +8,203 | New |
| Brevan Howard Capital Management LP | 7,765 | $213.4K | 0.00% | −3,347−30.1% | Reduced |
| Persistent Asset Partners Ltd | 6,942 | $190.8K | 0.06% | +6,942 | New |
| Barclays PLC | 6,133 | $168.5K | 0.00% | −20,917−77.3% | Reduced |
| MetLife Investment Management | 5,885 | $161.7K | 0.00% | +5,885 | New |
| Vanguard Global Advisers, LLC | 4,615 | $126.8K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 4,554 | $125.1K | 0.00% | −1,929−29.8% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 4,519 | $124.2K | 0.00% | +4,519 | New |
| New York State Common Retirement Fund | 4,200 | $115.4K | 0.00% | +4,200 | New |
| Police & Firemen's Retirement System of New Jersey | 2,907 | $79.9K | 0.00% | +2,907 | New |
| Legal & General Group Plc | 958 | $26.3K | 0.00% | +958 | New |
| Ameritas Investment Partners, Inc. | 895 | $24.6K | 0.00% | +895 | New |
| Russell Investments Group, Ltd. | 788 | $21.7K | 0.00% | +788 | New |
| HSBC Holdings PLC | 16,935 | $17.1K | 0.00% | +16,935 | New |
| Tower Research Capital LLC (TRC) | 530 | $14.6K | 0.00% | −14−2.6% | Reduced |
| Royal Bank of Canada | 440 | $12.0K | 0.00% | +424+2,650.0% | Added |
| Northwestern Mutual Wealth Management Co | 260 | $7.14K | 0.00% | 00.0% | Unchanged |
| Accent Capital Management, LLC | 212 | $5.83K | 0.00% | +70+49.3% | Added |
| Sterling Capital Management LLC | 199 | $5.47K | 0.00% | +199 | New |
| Truvestments Capital LLC | 193 | $5.30K | 0.00% | +193 | New |
| FMR LLC | 178 | $4.89K | 0.00% | +178 | New |
| California State Teachers Retirement System | 136 | $3.74K | 0.00% | +136 | New |
| Advisor Group Holdings, Inc. | 100 | $2.75K | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 75 | $2.06K | 0.00% | +75 | New |
| Quarry LP | 75 | $2.06K | 0.00% | +75 | New |
| EverSource Wealth Advisors, LLC | 55 | $1.51K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 10 | $275 | 0.00% | −19−65.5% | Reduced |
| Blackstone Group Inc. | 0 | $0 | 0.00% | −296,855−100.0% | Sold out |
| Adage Capital Partners GP, L.L.C. | 0 | $0 | 0.00% | −161,000−100.0% | Sold out |
| Patient Square Capital LP | 0 | $0 | 0.00% | −136,315−100.0% | Sold out |
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −39,446−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −34,499−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −32,949−100.0% | Sold out |
| 683 Capital Management, LLC | 0 | $0 | 0.00% | −27,863−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −26,496−100.0% | Sold out |