Assembly Biosciences
ASMB · NASDAQ
$21.19+$1.03 (+5.11%)TodayMarket closed ·
Prev close $20.16
Who owns ASMB
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 70.2% of ASMB’s shares.
- Gilead Sciences, Inc.25.1%
- Farallon Capital Management, L.L.C.8.1%
- Paradigm BioCapital Advisors LP7.8%
- Commodore Capital LP7.1%
- Next 6 largest institutions22.0%
- All other shareholders29.8%
| Holder | Shares | % of shares |
|---|---|---|
| Gilead Sciences, Inc. | 4.98M | 25.11% |
| Farallon Capital Management, L.L.C. | 1.60M | 8.10% |
| Paradigm BioCapital Advisors LP | 1.55M | 7.84% |
| Commodore Capital LP | 1.42M | 7.14% |
| RA Capital Management, LP | 1.02M | 5.15% |
| Janus Henderson Investors | 849.31K | 4.29% |
| Parkman Healthcare Partners LLC | 721.18K | 3.64% |
| BlackRock Institutional Trust Company, N.A. | 670.72K | 3.38% |
| Vanguard Capital Management, LLC | 558.94K | 2.82% |
| Schornstein (Alexander) | 543.52K | 2.74% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 413.28K | 2.09% |
| iShares Russell 2000 ETF | 243.94K | 1.23% |
| Vanguard Extended Market Index Fund | 133.61K | 0.67% |
| Fidelity Small Cap Index Fund | 106.70K | 0.54% |
| iShares Russell 2000 Value ETF | 88.52K | 0.45% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $674 (1 trade) of ASMB on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Bjorkquist Jeanette M | Sale | 29 | $674 |
| McHutchison John G | Award | 8.00K | — |
| Mahony Susan | Award | 8.00K | — |
| Johnson-Pratt Lisa | Award | 8.00K | — |
| Houghton Michael | Award | 8.00K | — |
| Consylman Gina | Award | 8.00K | — |
| ALTIG ANTHONY E | Award | 8.00K | — |
| GILEAD SCIENCES, INC. | Award | 471.70K | $12.50M |
Short interest
Settled Sep 30, 2026
- Shares short
- 2.82M
- Days to cover
- 6.83
- % of shares outstanding
- 14.24%
- Average daily volume
- 412.95K
- Change since last report
- +34.7%
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