ASSEMBLY BIOSCIENCES INC (ASMB)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
92
Reporting holders
$515.4M
Reported value
91.9%
Of shares outstanding
0.2%
Held as options
+18
Holder change
Institutions report 18,710,769 shares against 20,360,596 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| GILEAD SCIENCES, INC. | $136.8M | 4,977,089 | 8.30% | 7q | +10.5%+$13.0M |
| FARALLON CAPITAL MANAGEMENT, L.L.C. | $44.1M | 1,604,590 | 0.20% | 4q | +30.7%+$10.4M |
| Paradigm Biocapital Advisors LP | $42.7M | 1,553,748 | 0.80% | 3q | +133.6%+$24.4M |
| Commodore Capital LP | $38.9M | 1,415,000 | 2.32% | 4q | +41.5%+$11.4M |
| RA CAPITAL MANAGEMENT, L.P. | $28.0M | 1,020,410 | 0.24% | 4q | HELD |
| Jupiter Topco LLC | $23.4M | 849,309 | 0.01% | new | FIRST |
| BlackRock, Inc. | $21.1M | 766,819 | 0.00% | 8q | +278.2%+$15.5M |
| Parkman Healthcare Partners LLC | $19.8M | 721,181 | 2.03% | 4q | +75.4%+$8.5M |
| VANGUARD CAPITAL MANAGEMENT LLC | $15.4M | 558,942 | 0.00% | 2q | +14.0%+$1.9M |
| Point72 Asset Management, L.P. | $12.7M | 460,593 | 0.01% | 4q | +33.9%+$3.2M |
| Seven Fleet Capital Management LP | $11.9M | 433,147 | 1.96% | 3q | +671.5%+$10.4M |
| MILLENNIUM MANAGEMENT LLC | $8.2M | 298,807 | 0.00% | 4q | +27.9%+$1.8M |
| GEODE CAPITAL MANAGEMENT, LLC | $7.7M | 280,424 | 0.00% | 10q | +110.9%+$4.1M |
| Schonfeld Strategic Advisors LLC | $6.7M | 242,153 | 0.02% | 4q | +101.0%+$3.3M |
| AMERIPRISE FINANCIAL INC | $6.3M | 230,000 | 0.00% | new | NEW |
| DV EQUITIES, LLC | $6.2M | 226,415 | 0.89% | new | NEW |
| Aberdeen Group plc | $5.7M | 207,047 | 0.01% | new | NEW |
| Affinity Asset Advisors, LLC | $5.2M | 190,000 | 0.24% | new | NEW |
| B Group, Inc. | $4.8M | 175,706 | 2.27% | 7q | HELD |
| STATE STREET CORP | $4.7M | 171,931 | 0.00% | 10q | +203.3%+$3.2M |
| STEMPOINT CAPITAL LP | $4.7M | 170,378 | 0.81% | 4q | -54.1%-$5.5M |
| Squadron Capital Management LLC | $4.4M | 160,000 | 1.36% | new | NEW |
| Woodline Partners LP | $4.1M | 150,780 | 0.01% | new | NEW |
| Driehaus Capital Management LLC | $4.1M | 150,000 | 0.02% | new | NEW |
| Ally Bridge Group (NY) LLC | $3.8M | 140,000 | 3.40% | new | NEW |
| GOLDMAN SACHS GROUP INC | $3.8M | 137,833 | 0.00% | 4q | +280.7%+$2.8M |
| NORTHERN TRUST CORP | $3.4M | 123,029 | 0.00% | 10q | +200.0%+$2.3M |
| CITADEL ADVISORS LLC | $3.1M | 95,907 | 0.00% | 6q | +277.0%+$2.3M |
| FRANKLIN RESOURCES INC | $3.1M | 113,200 | 0.00% | new | NEW |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $2.5M | 91,153 | 0.00% | 2q | +414.3%+$2.0M |
| VANGUARD FIDUCIARY TRUST CO | $2.0M | 73,970 | 0.00% | 2q | +3.3%+$65.0K |
| HighVista Strategies LLC | $2.0M | 73,405 | 0.46% | 2q | -1.8%-$36.5K |
| Qube Research & Technologies Ltd | $1.4M | 51,488 | 0.00% | 4q | -25.7%-$488.3K |
| MONIMUS CAPITAL MANAGEMENT, LP | $1.3M | 47,580 | 0.30% | 7q | -1.7%-$22.3K |
| Trexquant Investment LP | $1.3M | 45,661 | 0.01% | 4q | +100.8%+$629.8K |
| JPMORGAN CHASE & CO | $1.3M | 46,385 | 0.00% | 10q | -14.0%-$204.3K |
| MORGAN STANLEY | $1.2M | 45,219 | 0.00% | 10q | +36.8%+$334.3K |
| XTX Topco Ltd | $1.2M | 42,918 | 0.02% | 2q | +297.9%+$883.0K |
| UBS Group AG | $1.1M | 41,806 | 0.00% | 10q | +11385.2%+$1.1M |
| RENAISSANCE TECHNOLOGIES LLC | $1.1M | 39,441 | 0.00% | 10q | +152.0%+$653.7K |
| Squarepoint Ops LLC | $940.2K | 34,214 | 0.00% | 2q | +43.7%+$286.1K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $800.4K | 29,128 | 0.00% | new | NEW |
| Sixth Street Partners Management Company, L.P. | $800.4K | 29,128 | 0.00% | new | NEW |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $742.0K | options only | 0.00% | 4q | OPTIONS |
| BNP PARIBAS FINANCIAL MARKETS | $665.1K | 24,203 | 0.00% | 7q | +16143.6%+$661.0K |
| Bank of New York Mellon Corp | $659.9K | 24,015 | 0.00% | new | NEW |
| Connor, Clark & Lunn Investment Management Ltd. | $653.1K | 23,765 | 0.00% | 4q | +9.2%+$55.1K |
| Caption Management, LLC | $627.3K | 22,829 | 0.00% | 4q | -72.1%-$1.6M |
| ADAR1 Capital Management, LLC | $561.9K | 20,447 | 0.03% | 4q | +2.5%+$13.7K |
| Palumbo Wealth Management LLC | $545.9K | 19,865 | 0.11% | 7q | +1.1%+$6.1K |
| TWO SIGMA INVESTMENTS, LP | $490.7K | 17,858 | 0.00% | 2q | -13.1%-$74.0K |
| Engineers Gate Manager LP | $488.2K | 17,766 | 0.01% | 3q | +88.5%+$229.3K |
| MARSHALL WACE, LLP | $487.4K | 17,735 | 0.00% | 4q | -89.1%-$4.0M |
| Nuveen, LLC | $463.7K | 16,875 | 0.00% | new | NEW |
| Eversept Partners, LP | $453.7K | 16,510 | 0.02% | 3q | -59.6%-$669.9K |
| Susquehanna Portfolio Strategies, LLC | $415.7K | 15,129 | 0.01% | 3q | +7.3%+$28.3K |
| Virtus Investment Advisers, LLC | $391.6K | 14,251 | 0.09% | 3q | +88.7%+$184.1K |
| AMERICAN CENTURY COMPANIES INC | $363.8K | 13,239 | 0.00% | 2q | +44.6%+$112.3K |
| Invesco Ltd. | $326.0K | 11,864 | 0.00% | new | NEW |
| RHUMBLINE ADVISERS | $318.5K | 11,590 | 0.00% | 10q | +6000.0%+$313.3K |
| Integrated Quantitative Investments LLC | $276.9K | 10,078 | 0.05% | new | NEW |
| DEUTSCHE BANK AG\ | $264.2K | 9,615 | 0.00% | new | NEW |
| BANK OF AMERICA CORP /DE/ | $262.9K | 9,567 | 0.00% | 9q | -12.2%-$36.7K |
| CANADA PENSION PLAN INVESTMENT BOARD | $233.6K | 8,500 | 0.00% | 3q | HELD |
| EntryPoint Capital, LLC | $227.7K | 8,285 | 0.06% | 2q | -33.1%-$112.6K |
| WELLS FARGO & COMPANY/MN | $226.8K | 8,253 | 0.00% | new | NEW |
| Brevan Howard Capital Management LP | $213.4K | 7,765 | 0.00% | 2q | -30.1%-$92.0K |
| Persistent Asset Partners Ltd | $190.8K | 6,942 | 0.06% | new | NEW |
| BARCLAYS PLC | $168.5K | 6,133 | 0.00% | 10q | -77.3%-$574.8K |
| MetLife Investment Management, LLC | $161.7K | 5,885 | 0.00% | new | NEW |
| Vanguard Global Advisers, LLC | $126.8K | 4,615 | 0.00% | 2q | HELD |
| CITIGROUP INC | $125.1K | 4,554 | 0.00% | 3q | -29.8%-$53.0K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $124.2K | 4,519 | 0.00% | new | NEW |
| NEW YORK STATE COMMON RETIREMENT FUND | $115.4K | 4,200 | 0.00% | new | NEW |
| Police & Firemen's Retirement System of New Jersey | $79.9K | 2,907 | 0.00% | new | NEW |
| Legal & General Group Plc | $26.3K | 958 | 0.00% | new | NEW |
| Ameritas Investment Partners, Inc. | $24.6K | 895 | 0.00% | new | NEW |
| Russell Investments Group, Ltd. | $21.7K | 788 | 0.00% | new | NEW |
| HSBC HOLDINGS PLC | $17.1K | 16,935 | 0.00% | new | NEW |
| Tower Research Capital LLC (TRC) | $14.6K | 530 | 0.00% | 3q | -2.6% |
| ROYAL BANK OF CANADA | $12.0K | 440 | 0.00% | new | NEW |
| SIMPLEX TRADING, LLC | $11.0K | options only | 0.00% | 4q | OPTIONS |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | $7.1K | 260 | 0.00% | 7q | HELD |
| Accent Capital Management, LLC | $5.8K | 212 | 0.00% | 2q | +49.3%+$1.9K |
| Sterling Capital Management LLC | $5.5K | 199 | 0.00% | new | NEW |
| Truvestments Capital LLC | $5.3K | 193 | 0.00% | new | NEW |
| FMR LLC | $4.9K | 178 | 0.00% | new | NEW |
| Integrated Wealth Concepts LLC | $3.0K | 108 | 0.00% | new | NEW |
| OSAIC HOLDINGS, INC. | $2.7K | 100 | 0.00% | 4q | HELD |
| Caitong International Asset Management Co., Ltd | $2.1K | 75 | 0.00% | new | NEW |
| Quarry LP | $2.1K | 75 | 0.00% | new | NEW |
| EverSource Wealth Advisors, LLC | $1.5K | 55 | 0.00% | 10q | HELD |
| GSA CAPITAL PARTNERS LLP | $1.2K | 42,931 | 0.07% | 5q | -4.7% |
| Allworth Financial LP | $275 | 10 | 0.00% | 3q | -65.5% |
| PRICE T ROWE ASSOCIATES INC /MD/ | $226 | 8,203 | 0.00% | new | NEW |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G/A | Paradigm BioCapital Advisors LPwith 3 co-filers | 7.8% |
| 2026-08-13 | 13G/A | JANUS HENDERSON GROUP Ltd. | 6.9% |
| 2026-08-04 | 13G/A | Farallon Capital Management, L.L.C.with 26 co-filers | 8.1% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 92 | $515.4M | 18,710,769 | 32 | 34 | 17 | 0.2% |
| Q1 2026 | 74 | $380.3M | 13,708,989 | 12 | 27 | 17 | 0.0% |
| Q4 2025 | 68 | $465.9M | 13,699,069 | 21 | 22 | 12 | 0.0% |
| Q3 2025 | 57 | $335.4M | 12,446,905 | 33 | 15 | 2 | 3.4% |
| Q2 2025 | 31 | $56.4M | 3,113,271 | 4 | 7 | 7 | 0.0% |
| Q1 2025 | 35 | $30.1M | 3,152,612 | 5 | 10 | 10 | 0.0% |
| Q4 2024 | 34 | $50.0M | 3,169,557 | 5 | 10 | 7 | 0.0% |
| Q3 2024 | 28 | $15.4M | 1,016,867 | 3 | 8 | 6 | 0.0% |
| Q2 2024 | 26 | $15.9M | 1,161,765 | 5 | 8 | 6 | 0.0% |
| Q1 2024 | 22 | $8.1M | 606,906 | 22 | 0 | 0 | 0.0% |
| Q4 2023 | 38 | $6.7M | 8,124,998 | 13 | 9 | 3 | 0.1% |
| Q3 2023 | 29 | $8.1M | 9,143,178 | 2 | 3 | 8 | 0.1% |
| Q2 2023 | 28 | $11.1M | 9,635,060 | 3 | 4 | 7 | 0.2% |
| Q1 2023 | 32 | $9.1M | 10,731,619 | 3 | 8 | 10 | 0.6% |
| Q4 2022 | 33 | $14.4M | 11,090,812 | 2 | 7 | 12 | 0.2% |
| Q3 2022 | 49 | $27.3M | 16,595,739 | 3 | 10 | 21 | 0.2% |
| Q2 2022 | 54 | $36.3M | 17,189,912 | 7 | 12 | 22 | 0.5% |
| Q1 2022 | 55 | $39.4M | 19,079,101 | 12 | 9 | 20 | 0.3% |
| Q4 2021 | 58 | $54.6M | 23,315,448 | 8 | 20 | 16 | 0.4% |
| Q3 2021 | 61 | $80.9M | 22,706,616 | 3 | 25 | 23 | 2.4% |
| Q2 2021 | 89 | $107.8M | 27,094,544 | 15 | 29 | 35 | 2.5% |
| Q1 2021 | 105 | $134.7M | 28,747,122 | 14 | 35 | 33 | 0.8% |
| Q4 2020 | 108 | $168.3M | 27,660,176 | 27 | 40 | 24 | 0.6% |
| Q3 2020 | 117 | $502.9M | 30,543,981 | 21 | 28 | 43 | 0.2% |
| Q2 2020 | 106 | $706.0M | 30,210,196 | 16 | 47 | 23 | 0.1% |
| Q1 2020 | 98 | $459.5M | 30,472,093 | 12 | 39 | 30 | 1.6% |
| Q4 2019 | 104 | $596.8M | 28,689,390 | 21 | 41 | 26 | 1.7% |
| Q3 2019 | 97 | $212.0M | 20,978,282 | 10 | 30 | 35 | 2.6% |
| Q2 2019 | 106 | $301.9M | 21,673,143 | 28 | 39 | 21 | 2.7% |
| Q1 2019 | 102 | $444.3M | 22,311,117 | 11 | 41 | 28 | 1.1% |
| Q4 2018 | 106 | $489.0M | 21,583,861 | 2 | 0 | 3 | 0.1% |