ASSEMBLY BIOSCIENCES INC (ASMB) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $373.71M 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 $125.02M in its March 31, 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 $108.81M, representing an estimated loss of -12.97% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 80% of the total disclosed ASMB value among the investors covered in this analysis. Major shareholders include Gilead Sciences, Inc., Farallon Capital Management Llc, Ra Capital Management, L.P., 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
72
Total Reported Value
$373.71M
Largest Holder
Gilead Sciences, Inc.
Largest Position
$125.02M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
84
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Gilead Sciences, Inc. | 5.90% | 4,505,391 | $125,024,600 | $108,805,193 | -$16,219,407 | -12.97% | |
| Farallon Capital Management Llc | 0.22% | 1,227,590 | $34,065,623 | $29,646,299 | -$4,419,325 | -12.97% | |
| Ra Capital Management, L.P. | 0.30% | 1,020,410 | $28,316,378 | $24,642,902 | -$3,673,477 | -12.97% | |
| Commodore Capital Lp | 1.61% | 1,000,000 | $27,750,000 | $24,150,000 | -$3,600,000 | -12.97% | |
| Janus Henderson Group Plc | 0.01% | 849,309 | $23,479,147 | $20,510,812 | -$2,968,335 | -12.64% | |
| Paradigm Biocapital Advisors Lp | 0.38% | 665,251 | $18,460,715 | $16,065,812 | -$2,394,903 | -12.97% | |
| Vanguard Capital Management Llc | 0.00% | 490,447 | $13,609,904 | $11,844,295 | -$1,765,609 | -12.97% | |
| Parkman Healthcare Partners Llc | 1.18% | 411,227 | $11,411,549 | $9,931,132 | -$1,480,417 | -12.97% | |
| Point72 Asset Management, L.P. | 0.02% | 344,105 | $9,548,914 | $8,310,136 | -$1,238,778 | -12.97% | |
| Blackstone Inc. | 0.03% | 296,855 | $8,237,726 | $7,169,048 | -$1,068,678 | -12.97% | |
| Millennium Management Llc | 0.00% | 233,650 | $6,483,788 | $5,642,648 | -$841,141 | -12.97% | |
| Blackrock, Inc. | 0.00% | 202,743 | $5,626,119 | $4,896,243 | -$729,876 | -12.97% | |
| Stempoint Capital Lp | 1.00% | 185,435 | $5,145,821 | $4,478,255 | -$667,566 | -12.97% | |
| B Group, Inc. | 3.61% | 175,706 | $4,875,842 | $4,243,300 | -$632,542 | -12.97% | |
| Marshall Wace, Llp | 0.00% | 163,400 | $4,534,349 | $3,946,110 | -$588,239 | -12.97% | |
| Adage Capital Partners Gp, L.L.C. | 0.01% | 161,000 | $4,467,750 | $3,888,150 | -$579,600 | -12.97% | |
| Patient Square Capital Lp | 0.67% | 136,315 | $3,782,741 | $3,292,007 | -$490,734 | -12.97% | |
| Geode Capital Management, Llc | 0.00% | 132,971 | $3,691,627 | $3,211,250 | -$480,377 | -13.01% | |
| Schonfeld Strategic Advisors Llc | 0.03% | 120,500 | $3,343,873 | $2,910,075 | -$433,798 | -12.97% | |
| Caption Management, Llc | 0.11% | 81,841 | $2,271,088 | $1,976,460 | -$294,628 | -12.97% | |
| Highvista Strategies Llc | 0.57% | 74,735 | $2,073,896 | $1,804,850 | -$269,046 | -12.97% | |
| Vanguard Fiduciary Trust Co | 0.00% | 71,606 | $1,987,067 | $1,729,285 | -$257,782 | -12.97% | |
| Qube Research & Technologies Ltd | 0.00% | 69,256 | $1,921,854 | $1,672,532 | -$249,322 | -12.97% | |
| State Street Corp | 0.00% | 56,689 | $1,573,120 | $1,369,039 | -$204,081 | -12.97% | |
| Seven Fleet Capital Management Lp | 0.49% | 56,147 | $1,558,080 | $1,355,950 | -$202,130 | -12.97% | |
| Monimus Capital Management, Lp | 0.37% | 48,390 | $1,342,822 | $1,168,619 | -$174,204 | -12.97% | |
| Northern Trust Corp | 0.00% | 41,014 | $1,138,139 | $990,488 | -$147,651 | -12.97% | |
| Eversept Partners, Lp | 0.07% | 40,889 | $1,134,670 | $987,469 | -$147,201 | -12.97% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 39,446 | $1,094,627 | $952,621 | -$142,006 | -12.97% | |
| Goldman Sachs Group Inc | 0.00% | 36,205 | $1,004,689 | $874,351 | -$130,338 | -12.97% | |
| Jane Street Group, Llc | 0.00% | 34,499 | $957,347 | $833,151 | -$124,196 | -12.97% | |
| Morgan Stanley | 0.00% | 33,055 | $917,277 | $798,278 | -$118,999 | -12.97% | |
| Susquehanna International Group, Llp | 0.00% | 32,949 | $914,335 | $795,718 | -$118,617 | -12.97% | |
| 683 Capital Management, Llc | 0.07% | 27,863 | $773,198 | $672,891 | -$100,307 | -12.97% | |
| Barclays Plc | 0.00% | 27,050 | $750,637 | $653,258 | -$97,380 | -12.97% | |
| Wellington Management Group Llp | 0.00% | 26,496 | $735,265 | $639,878 | -$95,387 | -12.97% | |
| Citadel Advisors Llc | 0.00% | 25,437 | $705,877 | $614,304 | -$91,573 | -12.97% | |
| Squarepoint Ops Llc | 0.00% | 23,804 | $660,561 | $574,867 | -$85,694 | -12.97% | |
| Trexquant Investment Lp | 0.00% | 22,741 | $631,063 | $549,195 | -$81,868 | -12.97% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 21,761 | $603,868 | $525,528 | -$78,340 | -12.97% | |
| Two Sigma Investments, Lp | 0.00% | 20,550 | $570,263 | $496,282 | -$73,981 | -12.97% | |
| Adar1 Capital Management, Llc | 0.03% | 19,947 | $553,529 | $481,720 | -$71,809 | -12.97% | |
| Palumbo Wealth Management Llc | 0.13% | 19,643 | $545,094 | $474,378 | -$70,716 | -12.97% | |
| Federated Hermes, Inc. | 0.00% | 18,904 | $524,586 | $456,532 | -$68,054 | -12.97% | |
| Vanguard Portfolio Management Llc | 0.00% | 17,723 | $491,813 | $428,010 | -$63,803 | -12.97% | |
| Hudson Bay Capital Management Lp | 0.00% | 16,799 | $466,172 | $405,696 | -$60,476 | -12.97% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 15,651 | $434,315 | $377,972 | -$56,343 | -12.97% |
| Susquehanna Portfolio Strategies, Llc | 0.01% | 14,100 | $391,275 | $340,515 | -$50,760 | -12.97% | |
| Entrypoint Capital, Llc | 0.10% | 12,384 | $343,656 | $299,074 | -$44,582 | -12.97% | |
| Brevan Howard Capital Management Lp | 0.00% | 11,112 | $308,358 | $268,355 | -$40,003 | -12.97% |
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.