Assembly Biosciences, Inc.
ASMB- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001426800
No open-market purchases or sales by Assembly Biosciences, Inc. insiders were filed in the last 90 days; 92 institutions reported holding it in 13F filings for Q2 2026, worth $514.8M in total; no superinvestor holds it.
Q4 2025 vs. Q3 2025
How the institutions holding Assembly Biosciences, Inc. changed between Q3 2025 and Q4 2025.
All holders in Q4 2025All holders in Q3 2025
| Measure | Q3 2025 | Of which not filed for Q4 2025 | Q4 2025 | Change |
|---|---|---|---|---|
| Holders | 57 | 2 | 69 | +14 |
| Shares | 12.5M | 16.2K | 13.7M | +1.26M (+10.1%) |
| Value | $324.9M | $414.0K | $466.7M | +$142.2M (+43.8%) |
2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.
New holders (22)
Institutions that held Assembly Biosciences, Inc. at the end of Q4 2025 but not at the end of Q3 2025.
Sold out (8)
Institutions that held Assembly Biosciences, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| Frazier Life Sciences Management, L.P. | 456,249 | $11.7M |
| MPM Oncology Impact Management LP | 39,665 | $1.02M |
| Walleye Capital LLC | 24,501 | $627.2K |
| Quadrature Capital Ltd | 17,935 | $459.1K |
| Bridgeway Capital Management, LLC | 15,225 | $389.8K |
| XTX Topco Ltd | 12,806 | $327.8K |
| Wells Fargo & Company | 145 | $3.71K |
| SBI Securities Co., Ltd. | 68 | $1.74K |
Not filed for Q4 2025 yet (2)
Institutions that held Assembly Biosciences, Inc. at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| Cubist Systematic Strategies, LLC | 16,161 | $413.7K |
| Point72 Europe (London) LLP | 13 | $332 |