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