AI summary pending
View Full Filing (SEC EDGAR)Assembly Biosciences Inc
$20.09-2.3%
+$165.8M
Net Activity
+38.76% total shares
Institutions Holding
95
Popularity Rank
#4719
Avg Weight
0.28%
Total Value
$517.0M
Market Cap
$225.2M
95 institutions currently hold ASMB, with 71 net buyers and 32 net sellers this quarter.
Institutional Moves (Q2 2026)
Majority Increased
Based on recent trading activity
Net Selling Institutions
32
Net Buying Institutions
71
Top 5 by Value
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Across its top 20 institutional holders, ASMB's holder base skews toward low-concentration, high-turnover investors on average (avg. concentration score 19/100, avg. turnover score 52/100).
ASMB ranks #4719 out of 37696 tracked stocks by institutional interest, inside the more closely watched half of our coverage.
ASMB is a top-conviction position for Gilead Sciences, Inc. — at 8.3% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
ASMB is down 2.3% today, but institutions show net buying of $165.8M this quarter — a divergence between today's price move and the underlying institutional flow.
ASMB reported a net loss of $42.0K over the trailing twelve months.
+$179.7M
Total Buy Value
$30.2M
Total Sell Value
71
Net Buyers
32
Net Sellers
ASMB
Q2 2026
Top 5 Institutional Movers
+$24.2M
+$23.4M
+$15.4M
+$11.7M
+$11.1M
ASMB does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
No Form 144 planned sale filings in the last 90 days
3
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| Paradigm BioCapital Advisors LP | 13G/A | 2026-08-14 | 7.8% |
| JANUS HENDERSON GROUP Ltd. | 13G/A | 2026-08-13 | 6.9% |
| Farallon Capital Management, L.L.C. | 13G/A | 2026-08-04 | 8.1% |
2
Filings (14d)
AI summary pending
View Full Filing (SEC EDGAR)AI summary pending
View Full Filing (SEC EDGAR)045396207, 045396108
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,278
Total reported value
$2.2T
3254 13F institutions increased their position this quarter
Institutions Holding
6,025
Total reported value
$3.6T
3054 13F institutions increased their position this quarter
Institutions Holding
6,188
Total reported value
$1.8T
2995 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,868
Total reported value
$1.5T
Held by 4868 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,789
Total reported value
$1.2T
Held by 4789 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,716
Total reported value
$473.6B
Held by 4716 institutions — one of the most-tracked stocks on AlphaSMO
Access ASMB's institutional ownership data programmatically:
REST API
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