ASMB Institutional Ownership
Who owns Assembly Biosciences, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 94 funds reported holding ASMB at Jun 30, 2026, together owning 92.1% of the company.
- ▲67 buying vs 32 selling
- ▲Held by funds +24.5 pts
- ▲Funds holding +18
- ▲Superinvestors: 4 added, 0 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 94 | 76 | +23.7% |
| In funds' top 10 | 3 | 1 | +200.0% |
| 13F shares | 18.7M | 13.8M | +36.3% |
| Held by funds | 92.1% | 67.5% | +24.5 pts |
| New positions | 32 | 13 | +146.2% |
| Increased | 35 | 28 | +25.0% |
| Reduced | 17 | 17 | 0.0% |
| Sold out | 15 | 10 | +50.0% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ASMB
All superinvestors →
Who owns ASMB
share of fund held shares- Index and passive funds11.3%
- Active managers and hedge funds85.3%
- Banks and brokers3.4%
- Pensions, insurers and other0.1%
The top 10 holders own 74.3% of all ASMB shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
5 funds changed their position- State of Alaska, Department of RevenueNew+989 sh
- Caitong International Asset Management Co., LtdTrimmed−61 sh
- Sterling Capital Management LLCAdded+61 sh
- GAMMA Investing LLCNew+20 sh
- Root Financial Partners, LLCNew+1 sh
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Gilead Sciences, Inc. | 24.44% | 5M | $137M | +472K |
| 2 | Farallon Capital Management, L.l.c. | 7.88% | 1.6M | $44.1M | +377K |
| 3 | Paradigm Biocapital Advisors LP | 7.63% | 1.6M | $42.7M | +888K |
| 4 | Commodore Capital LP | 6.95% | 1.4M | $38.9M | +415K |
| 5 | RA Capital Management, L.P. | 5.01% | 1M | $28M | 0 |
| 6 | Jupiter Topco LLC | 4.17% | 849K | $23.4M | – |
| 7 | BlackRock, Inc. | 3.77% | 767K | $21.1M | +564K |
| 8 | Parkman Healthcare Partners LLC | 3.54% | 721K | $19.8M | +310K |
| 9 | Vanguard Capital Management LLC | 2.75% | 559K | $15.4M | +68K |
| 10 | Point72 Asset Management, L.P. | 2.26% | 461K | $12.7M | +116K |
- Paradigm Biocapital Advisors LP+888K sh+$24.4M
- BlackRock, Inc.+564K sh+$15.5M
- Gilead Sciences, Inc.+472K sh+$13M
- Commodore Capital LP+415K sh+$11.4M
- Farallon Capital Management, L.l.c.+377K sh+$10.4M
- Seven Fleet Capital Management LP+377K sh+$10.4M
- Parkman Healthcare Partners LLC+310K sh+$8.5M
- Ameriprise Financial Inc+230K sh+$6.3M
- Blackstone Inc.−297K sh−$8.2M
- Stempoint Capital LP−200K sh−$5.5M
- Adage Capital Partners Gp, L.l.c.−161K sh−$4.5M
- Marshall Wace, LLP−146K sh−$4M
- Patient Square Capital LP−136K sh−$3.8M
- Caption Management, LLC−59K sh−$1.6M
- Arrowstreet Capital, Limited Partnership−39K sh−$1.1M
- Jane Street Group, LLC−34K sh−$957K
ASMB institutional ownership FAQ
Who owns the most ASMB stock?
In Q2 2026 13F filings the largest holder of ASMB was Gilead Sciences, Inc., followed by Farallon Capital Management, L.l.c. and Paradigm Biocapital Advisors LP. Index fund managers are usually the biggest holders of large companies.
What percentage of ASMB is owned by institutions?
Funds that file 13F reports held 92.1% of ASMB's shares at Jun 30, 2026, compared with 67.5% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying ASMB?
In Q2 2026, 67 funds bought ASMB (32 of them new positions) and 32 sold (15 sold out completely). Among well known investors, 4 added and 0 cut. Our fund sentiment for ASMB is strongly bullish.
What is ASMB's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this ASMB ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.