ASMB Institutional Ownership & Shareholders
ASSEMBLY BIOSCIENCES INC (ASMB) is currently held by 90 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $461.48M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Gilead Sciences, Inc. is currently the largest disclosed institutional shareholder of ASMB tracked by InsiderSet, reporting ownership valued at approximately $136.77M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $100.19M, representing an estimated loss of -26.75% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 76% of the total disclosed ASMB value among the investors covered in this analysis. Major shareholders include Gilead Sciences, Inc., Paradigm Biocapital Advisors Lp, Commodore Capital Lp, and several other long-term asset managers with concentrated positions in ASSEMBLY BIOSCIENCES INC (ASMB).
This page ranks the largest institutional ASMB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
90
Total Reported Value
$461.48M
Largest Holder
Gilead Sciences, Inc.
Largest Position
$136.77M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
116
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Gilead Sciences, Inc. | 8.30% | 4,977,089 | $136,770,406 | $100,188,802 | -$36,581,604 | -26.75% | |
| Paradigm Biocapital Advisors Lp | 0.80% | 1,553,748 | $42,696,995 | $31,276,947 | -$11,420,048 | -26.75% | |
| Commodore Capital Lp | 2.32% | 1,415,000 | $38,884,200 | $28,483,950 | -$10,400,250 | -26.75% | |
| Ra Capital Management, L.P. | 0.24% | 1,020,410 | $28,040,867 | $20,540,853 | -$7,500,014 | -26.75% | |
| Janus Henderson Group Plc | 0.01% | 849,309 | $23,479,147 | $17,096,590 | -$6,382,557 | -27.18% | |
| Blackrock, Inc. | 0.00% | 766,819 | $21,072,187 | $15,436,066 | -$5,636,121 | -26.75% | |
| Parkman Healthcare Partners Llc | 2.04% | 721,181 | $19,818,054 | $14,517,374 | -$5,300,680 | -26.75% | |
| Vanguard Capital Management Llc | 0.00% | 558,942 | $15,359,726 | $11,251,502 | -$4,108,224 | -26.75% | |
| Point72 Asset Management, L.P. | 0.02% | 460,593 | $12,657,096 | $9,271,737 | -$3,385,359 | -26.75% | |
| Seven Fleet Capital Management Lp | 1.96% | 433,147 | $11,902,879 | $8,719,249 | -$3,183,630 | -26.75% | |
| Millennium Management Llc | 0.01% | 298,807 | $8,211,216 | $6,014,985 | -$2,196,231 | -26.75% | |
| Geode Capital Management, Llc | 0.00% | 280,424 | $7,707,832 | $5,644,935 | -$2,062,897 | -26.76% | |
| Schonfeld Strategic Advisors Llc | 0.04% | 242,153 | $6,654,363 | $4,874,540 | -$1,779,823 | -26.75% | |
| Ameriprise Financial Inc | 0.00% | 230,000 | $6,320,400 | $4,629,900 | -$1,690,500 | -26.75% | |
| Aberdeen Group Plc | 0.01% | 207,047 | $5,689,652 | $4,167,856 | -$1,521,796 | -26.75% | |
| Affinity Asset Advisors, Llc | 0.26% | 190,000 | $5,221,200 | $3,824,700 | -$1,396,500 | -26.75% | |
| B Group, Inc. | 2.74% | 175,706 | $4,828,401 | $3,536,962 | -$1,291,439 | -26.75% | |
| State Street Corp | 0.00% | 171,931 | $4,724,664 | $3,460,971 | -$1,263,693 | -26.75% | |
| Stempoint Capital Lp | 0.81% | 170,378 | $4,681,987 | $3,429,709 | -$1,252,278 | -26.75% | |
| Squadron Capital Management Llc | 1.51% | 160,000 | $4,396,800 | $3,220,800 | -$1,176,000 | -26.75% | |
| Woodline Partners Lp | 0.01% | 150,780 | $4,143,434 | $3,035,201 | -$1,108,233 | -26.75% | |
| Driehaus Capital Management Llc | 0.02% | 150,000 | $4,122,000 | $3,019,500 | -$1,102,500 | -26.75% | |
| Ally Bridge Group (Ny) Llc | 4.96% | 140,000 | $3,847,200 | $2,818,200 | -$1,029,000 | -26.75% | |
| Goldman Sachs Group Inc | 0.00% | 137,833 | $3,787,651 | $2,774,578 | -$1,013,073 | -26.75% | |
| Northern Trust Corp | 0.00% | 123,029 | $3,380,837 | $2,476,574 | -$904,263 | -26.75% | |
| Citadel Advisors Llc | 0.00% | 95,907 | $2,635,524 | $1,930,608 | -$704,916 | -26.75% | |
| Vanguard Portfolio Management Llc | 0.00% | 91,153 | $2,504,884 | $1,834,910 | -$669,974 | -26.75% | |
| Vanguard Fiduciary Trust Co | 0.00% | 73,970 | $2,032,696 | $1,489,016 | -$543,680 | -26.75% | |
| Highvista Strategies Llc | 0.46% | 73,405 | $2,017,170 | $1,477,643 | -$539,527 | -26.75% | |
| Qube Research & Technologies Ltd | 0.00% | 51,488 | $1,414,890 | $1,036,453 | -$378,437 | -26.75% | |
| Monimus Capital Management, Lp | 0.33% | 47,580 | $1,307,498 | $957,785 | -$349,713 | -26.75% | |
| Trexquant Investment Lp | 0.01% | 45,661 | $1,254,764 | $919,156 | -$335,608 | -26.75% | |
| Jpmorgan Chase & Co | 0.00% | 46,385 | $1,250,540 | $933,730 | -$316,810 | -25.33% | |
| Morgan Stanley | 0.00% | 45,219 | $1,242,618 | $910,258 | -$332,360 | -26.75% | |
| Gsa Capital Partners Llp | 0.07% | 42,931 | $1,180,000 | $864,201 | -$315,799 | -26.76% | |
| Xtx Topco Ltd | 0.02% | 42,918 | $1,179,387 | $863,939 | -$315,448 | -26.75% | |
| Ubs Group Ag | 0.00% | 41,806 | $1,148,829 | $841,555 | -$307,274 | -26.75% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 39,441 | $1,083,839 | $793,947 | -$289,892 | -26.75% |
| Squarepoint Ops Llc | 0.00% | 34,214 | $940,201 | $688,728 | -$251,473 | -26.75% | |
| Charles Schwab Investment Management Inc | 0.00% | 29,128 | $800,437 | $586,347 | -$214,090 | -26.75% | |
| Bnp Paribas Financial Markets | 0.00% | 24,203 | $665,098 | $487,206 | -$177,892 | -26.75% | |
| Bank Of New York Mellon Corp | 0.00% | 24,015 | $659,933 | $483,422 | -$176,511 | -26.75% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 23,765 | $653,062 | $478,389 | -$174,673 | -26.75% | |
| Caption Management, Llc | 0.02% | 22,829 | $627,341 | $459,548 | -$167,793 | -26.75% | |
| Adar1 Capital Management, Llc | 0.03% | 20,447 | $561,884 | $411,598 | -$150,286 | -26.75% | |
| Palumbo Wealth Management Llc | 0.11% | 19,865 | $545,891 | $399,882 | -$146,009 | -26.75% | |
| Two Sigma Investments, Lp | 0.00% | 17,858 | $490,738 | $359,482 | -$131,256 | -26.75% | |
| Engineers Gate Manager Lp | 0.01% | 17,766 | $488,210 | $357,630 | -$130,580 | -26.75% | |
| Marshall Wace, Llp | 0.00% | 17,735 | $487,357 | $357,006 | -$130,351 | -26.75% | |
| Nuveen, Llc | 0.00% | 16,875 | $463,725 | $339,694 | -$124,031 | -26.75% |
Frequently asked questions about ASMB
Who are the largest institutional holders of ASMB?
The largest institutional holders of ASMB reported in the latest SEC Form 13F filings include Gilead Sciences, Inc., Paradigm Biocapital Advisors Lp, Commodore Capital Lp, Ra Capital Management, L.P., and Janus Henderson Group Plc. InsiderSet ranks institutional holders by their latest reported ASMB position.
What is ASMB institutional ownership?
This page tracks ASMB positions reported by institutional investment managers through SEC Form 13F. ASSEMBLY BIOSCIENCES INC (ASMB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ASMB?
InsiderSet currently tracks 90 institutional managers reporting ASMB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ASMB shareholders.
How much ASMB stock do institutions own?
Institutional investment managers disclosed approximately $461.48M in ASMB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ASMB institutional ownership last updated?
The latest ASMB institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ASMB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ASMB position after the reporting date.
Are institutions buying or selling ASMB?
Institutional buying and selling can be analyzed by comparing ASMB positions across consecutive 13F reporting periods. InsiderSet's ASMB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ASMB ownership changes.
How has ASMB institutional ownership changed over time?
InsiderSet tracks ASMB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.