Assembly Biosciences
ASMB
57 hedge funds and large institutions have $325M invested in Assembly Biosciences in 2025 Q3 according to their latest regulatory filings, with 31 funds opening new positions, 15 increasing their positions, 3 reducing their positions, and 7 closing their positions.
470% more capital invested
Capital invested by funds: $57M → $325M (+$268M)
400% more repeat investments, than reductions
Existing positions increased: 15 | Existing positions reduced: 3
343% more first-time investments, than exits
New positions opened: 31 | Existing positions closed: 7
121.47% more ownership
Funds ownership: 41.22% → 162.7% (+121%)
73% more funds holding
Funds holding: 33 → 57 (+24)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GS
Gilead Sciences
Foster City,
California
|
+$50.4M |
| 2 |
FCM
Farallon Capital Management
San Francisco,
California
|
+$26.9M |
| 3 |
RCM
RA Capital Management
Boston,
Massachusetts
|
+$22.4M |
| 4 |
CC
Commodore Capital
New York
|
+$21.9M |
| 5 |
Janus Henderson Group
London,
|
+$16.5M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BGI
B Group Inc
Dallas,
Texas
|
-$299K |
| 2 |
Man Group
London,
United Kingdom
|
-$240K |
| 3 |
LCM
Lynx1 Capital Management
San Juan,
Puerto Rico
|
-$188K |
| 4 |
GCP
GSA Capital Partners
London,
United Kingdom
|
-$53.1K |
| 5 |
BNP Paribas Financial Markets
Paris,
France
|
-$5.35K |
ASMB Hedge Fund Activity: Q3 2025 in Review
57 of the 7,630 institutional investors tracked by Wall St. Rank reported a position in Assembly Biosciences (ASMB) for Q3 2025, worth a combined $325M — up 470% from $57M a quarter earlier.
Buyers outnumbered sellers: 31 funds opened new ASMB positions and 7 closed out — a net gain of 24 holders — while 15 added to existing stakes and 3 trimmed.
The largest buyer was Gilead Sciences, adding an estimated $50.4M. The largest seller was B Group Inc, cutting an estimated $299K.
- 57 institutional investors held Assembly Biosciences (ASMB) as of Q3 2025, up from 33 in Q2 2025.
- Funds reported $325M of Assembly Biosciences stock for Q3 2025, up 470% quarter-over-quarter.
- 31 funds opened new Assembly Biosciences positions in Q3 2025 and 7 closed out, a net change of +24 holders.
- The largest Assembly Biosciences buyer in Q3 2025 was Gilead Sciences, an estimated $50.4M added.
- The largest Assembly Biosciences seller in Q3 2025 was B Group Inc, an estimated $299K sold.
Based on aggregated 13F filings for Q3 2025.