ASSEMBLY BIOSCIENCES INC (ASMB) Institutional Shareholders
ASSEMBLY BIOSCIENCES INC (ASMB) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $461.48M in ASMB holdings during the latest filing period.
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 $126.12M, representing an estimated loss of -7.79% 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
87
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
113
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 | $126,119,435 | -$10,650,971 | -7.79% | |
| Paradigm Biocapital Advisors Lp | 0.80% | 1,553,748 | $42,696,995 | $39,371,974 | -$3,325,021 | -7.79% | |
| Commodore Capital Lp | 2.32% | 1,415,000 | $38,884,200 | $35,856,100 | -$3,028,100 | -7.79% | |
| Ra Capital Management, L.P. | 0.24% | 1,020,410 | $28,040,867 | $25,857,189 | -$2,183,678 | -7.79% | |
| Janus Henderson Group Plc | 0.01% | 849,309 | $23,479,147 | $21,521,490 | -$1,957,657 | -8.34% | |
| Blackrock, Inc. | 0.00% | 766,819 | $21,072,187 | $19,431,193 | -$1,640,994 | -7.79% | |
| Parkman Healthcare Partners Llc | 2.04% | 721,181 | $19,818,054 | $18,274,727 | -$1,543,327 | -7.79% | |
| Vanguard Capital Management Llc | 0.00% | 558,942 | $15,359,726 | $14,163,590 | -$1,196,136 | -7.79% | |
| Point72 Asset Management, L.P. | 0.02% | 460,593 | $12,657,096 | $11,671,427 | -$985,669 | -7.79% | |
| Seven Fleet Capital Management Lp | 1.96% | 433,147 | $11,902,879 | $10,975,945 | -$926,934 | -7.79% | |
| Millennium Management Llc | 0.01% | 298,807 | $8,211,216 | $7,571,769 | -$639,447 | -7.79% | |
| Geode Capital Management, Llc | 0.00% | 280,424 | $7,707,832 | $7,105,944 | -$601,888 | -7.81% | |
| Schonfeld Strategic Advisors Llc | 0.04% | 242,153 | $6,654,363 | $6,136,157 | -$518,206 | -7.79% | |
| Ameriprise Financial Inc | 0.00% | 230,000 | $6,320,400 | $5,828,200 | -$492,200 | -7.79% | |
| Aberdeen Group Plc | 0.01% | 207,047 | $5,689,652 | $5,246,571 | -$443,081 | -7.79% | |
| Affinity Asset Advisors, Llc | 0.26% | 190,000 | $5,221,200 | $4,814,600 | -$406,600 | -7.79% | |
| B Group, Inc. | 2.74% | 175,706 | $4,828,401 | $4,452,390 | -$376,011 | -7.79% | |
| State Street Corp | 0.00% | 171,931 | $4,724,664 | $4,356,732 | -$367,932 | -7.79% | |
| Stempoint Capital Lp | 0.81% | 170,378 | $4,681,987 | $4,317,379 | -$364,608 | -7.79% | |
| Squadron Capital Management Llc | 1.51% | 160,000 | $4,396,800 | $4,054,400 | -$342,400 | -7.79% | |
| Woodline Partners Lp | 0.01% | 150,780 | $4,143,434 | $3,820,765 | -$322,669 | -7.79% | |
| Driehaus Capital Management Llc | 0.02% | 150,000 | $4,122,000 | $3,801,000 | -$321,000 | -7.79% | |
| Ally Bridge Group (Ny) Llc | 4.96% | 140,000 | $3,847,200 | $3,547,600 | -$299,600 | -7.79% | |
| Goldman Sachs Group Inc | 0.00% | 137,833 | $3,787,651 | $3,492,688 | -$294,963 | -7.79% | |
| Northern Trust Corp | 0.00% | 123,029 | $3,380,837 | $3,117,555 | -$263,282 | -7.79% | |
| Citadel Advisors Llc | 0.00% | 95,907 | $2,635,524 | $2,430,283 | -$205,241 | -7.79% | |
| Vanguard Portfolio Management Llc | 0.00% | 91,153 | $2,504,884 | $2,309,817 | -$195,067 | -7.79% | |
| Vanguard Fiduciary Trust Co | 0.00% | 73,970 | $2,032,696 | $1,874,400 | -$158,296 | -7.79% | |
| Highvista Strategies Llc | 0.46% | 73,405 | $2,017,170 | $1,860,083 | -$157,087 | -7.79% | |
| Qube Research & Technologies Ltd | 0.00% | 51,488 | $1,414,890 | $1,304,706 | -$110,184 | -7.79% | |
| Monimus Capital Management, Lp | 0.33% | 47,580 | $1,307,498 | $1,205,677 | -$101,821 | -7.79% | |
| Trexquant Investment Lp | 0.01% | 45,661 | $1,254,764 | $1,157,050 | -$97,714 | -7.79% | |
| Jpmorgan Chase & Co | 0.00% | 46,385 | $1,250,540 | $1,175,396 | -$75,144 | -6.01% | |
| Morgan Stanley | 0.00% | 45,219 | $1,242,618 | $1,145,849 | -$96,769 | -7.79% | |
| Gsa Capital Partners Llp | 0.07% | 42,931 | $1,180,000 | $1,087,872 | -$92,128 | -7.81% | |
| Xtx Topco Ltd | 0.02% | 42,918 | $1,179,387 | $1,087,542 | -$91,845 | -7.79% | |
| Ubs Group Ag | 0.00% | 41,806 | $1,148,829 | $1,059,364 | -$89,465 | -7.79% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 39,441 | $1,083,839 | $999,435 | -$84,404 | -7.79% |
| Squarepoint Ops Llc | 0.00% | 34,214 | $940,201 | $866,983 | -$73,218 | -7.79% | |
| Charles Schwab Investment Management Inc | 0.00% | 29,128 | $800,437 | $738,104 | -$62,333 | -7.79% | |
| Bnp Paribas Financial Markets | 0.00% | 24,203 | $665,098 | $613,304 | -$51,794 | -7.79% | |
| Bank Of New York Mellon Corp | 0.00% | 24,015 | $659,933 | $608,540 | -$51,393 | -7.79% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 23,765 | $653,062 | $602,205 | -$50,857 | -7.79% | |
| Caption Management, Llc | 0.02% | 22,829 | $627,341 | $578,487 | -$48,854 | -7.79% | |
| Adar1 Capital Management, Llc | 0.03% | 20,447 | $561,884 | $518,127 | -$43,757 | -7.79% | |
| Palumbo Wealth Management Llc | 0.11% | 19,865 | $545,891 | $503,379 | -$42,512 | -7.79% | |
| Two Sigma Investments, Lp | 0.00% | 17,858 | $490,738 | $452,522 | -$38,216 | -7.79% | |
| Engineers Gate Manager Lp | 0.01% | 17,766 | $488,210 | $450,190 | -$38,020 | -7.79% | |
| Marshall Wace, Llp | 0.00% | 17,735 | $487,357 | $449,405 | -$37,952 | -7.79% | |
| Nuveen, Llc | 0.00% | 16,875 | $463,725 | $427,613 | -$36,113 | -7.79% |
Frequently asked questions about ASMB
Who owns the most ASMB stock?
The largest holders of ASMB are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ASSEMBLY BIOSCIENCES INC (ASMB).
Is ASMB widely held by superinvestors?
Many widely followed stocks like ASMB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ASMB is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.