AI summary pending
View Full Filing (SEC EDGAR)Assembly Biosciences Inc
$36.72+4.4%
+$165.8M
Net Activity
+38.76% total shares
Institutions Holding
95
Popularity Rank
#4717
Avg Weight
0.28%
Total Value
$517.0M
Market Cap
$411.7M
95 institutions currently hold ASMB, with 70 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
70
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 #4717 out of 37501 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.
Parkman Healthcare Partners LLC has added to its ASMB position for two straight quarters, increasing it by $11.3M to reach $19.8M today.
Ra Capital Management, L.p. has trimmed its ASMB position for two straight quarters, cutting it by $6.7M while still holding $28.0M.
ASMB is up 4.4% today, and institutions have been net buyers of $165.8M this quarter — today's price move and the underlying institutional flow are pointing the same direction.
ASMB reported a net loss of $42.0K over the trailing twelve months.
+$176.6M
Total Buy Value
$30.2M
Total Sell Value
70
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 2026-06-30 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
6,242
Total reported value
$2.2T
3229 13F institutions increased their position this quarter
Institutions Holding
5,990
Total reported value
$3.6T
3033 13F institutions increased their position this quarter
Institutions Holding
6,153
Total reported value
$1.8T
2971 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,839
Total reported value
$1.5T
Held by 4839 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,763
Total reported value
$1.2T
Held by 4763 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,691
Total reported value
$473.3B
Held by 4691 institutions — one of the most-tracked stocks on AlphaSMO
Access ASMB's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/ASMBCLI
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