Assembly Biosciences
ASMB
93 hedge funds and large institutions have $515M invested in Assembly Biosciences in 2026 Q2 according to their latest regulatory filings, with 34 funds opening new positions, 35 increasing their positions, 17 reducing their positions, and 15 closing their positions.
200% more funds holding in top 10
Funds holding in top 10: 1 → 3 (+2)
127% more first-time investments, than exits
New positions opened: 34 | Existing positions closed: 15
106% more repeat investments, than reductions
Existing positions increased: 35 | Existing positions reduced: 17
51% more call options, than puts
Call options by funds: $758K | Put options by funds: $503K
37% more capital invested
Capital invested by funds: $376M → $515M (+$138M)
32.44% more ownership
Funds ownership: 85.54% → 117.98% (+32%)
24% more funds holding
Funds holding: 75 → 93 (+18)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PBA
Paradigm Biocapital Advisors
New York
|
+$24.2M |
| 2 |
BlackRock
New York
|
+$15.4M |
| 3 |
GS
Gilead Sciences
Foster City,
California
|
+$12.8M |
| 4 |
CC
Commodore Capital
New York
|
+$11.3M |
| 5 |
FCM
Farallon Capital Management
San Francisco,
California
|
+$10.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Blackstone Inc
New York
|
-$8.24M |
| 2 |
Adage Capital Partners
Boston,
Massachusetts
|
-$4.47M |
| 3 |
Marshall Wace
London,
United Kingdom
|
-$3.97M |
| 4 |
PSC
Patient Square Capital
Menlo Park,
California
|
-$3.78M |
| 5 |
CM
Caption Management
Oklahoma City,
Oklahoma
|
-$1.61M |
ASMB Hedge Fund Activity: Q2 2026 in Review
93 of the 8,316 institutional investors tracked by Wall St. Rank reported a position in Assembly Biosciences (ASMB) for Q2 2026, worth a combined $515M — up 37% from $376M a quarter earlier.
Buyers outnumbered sellers: 34 funds opened new ASMB positions and 15 closed out — a net gain of 19 holders — while 35 added to existing stakes and 17 trimmed.
The largest buyer was Paradigm Biocapital Advisors, adding an estimated $24.2M. The largest seller was Blackstone Inc, exiting entirely with an estimated $8.24M sold.
- 93 institutional investors held Assembly Biosciences (ASMB) as of Q2 2026, up from 75 in Q1 2026.
- Funds reported $515M of Assembly Biosciences stock for Q2 2026, up 37% quarter-over-quarter.
- 34 funds opened new Assembly Biosciences positions in Q2 2026 and 15 closed out, a net change of +19 holders.
- The largest Assembly Biosciences buyer in Q2 2026 was Paradigm Biocapital Advisors, an estimated $24.2M added.
- The largest Assembly Biosciences seller in Q2 2026 was Blackstone Inc, an estimated $8.24M sold.
Based on aggregated 13F filings for Q2 2026.