Assembly BiosciencesASMB
13F holders, Q1 2025 (March 31)At the end of Q1 2025, 37 institutions reported holding Assembly Biosciences Inc. (ASMB) in their 13F filings, up 2 from Q4 2024. 6 opened new positions and 4 sold out. The largest holders were Gilead Sciences, Inc. ($21.1M), Vanguard Group Inc. ($2.1M) and B Group, Inc. ($1.9M). 2 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Assembly Biosciences Inc.
- CUSIP
- 045396207
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 6 | $414K |
| Exits | 4 | $1.2M |
All 13F filers, Q4 2024 → Q1 2025: 246,092 shares bought and 256,181 shares sold, net −10,089 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 37 holders
| Gilead Sciences, Inc. | 1.79% | No change | 2,209,471 | $21.1M |
| Vanguard Group Inc. | 0.00% | Add +7.7% | 215,983 | $2.1M |
| B Group, Inc. | 1.66% | Add +294.9% | 200,000 | $1.9M |
| Renaissance Technologies | 0.00% | Add +19.6% | 113,311 | $1.1M |
| BlackRock, Inc. | 0.00% | Reduce -3.1% | 78,988 | $755K |
| Geode Capital Management, LLC | 0.00% | Add +2.3% | 47,703 | $456K |
| Monimus Capital Management, LP | 0.34% | No change | 42,067 | $402K |
| Northern Trust Corp. | 0.00% | Reduce -1.1% | 28,323 | $271K |
| Federated Hermes, Inc. | 0.00% | No change | 25,394 | $243K |
| Armistice Capital, LLC | 0.01% | Reduce -85.8% | 23,858 | $228K |
| Acadian Asset Management LLC | 0.00% | Add +42.1% | 23,027 | $219K |
| Squarepoint Ops LLC | 0.00% | New | 18,982 | $181K |
| Marshall Wace, LLP | 0.00% | Add +21.7% | 18,040 | $172K |
| Palumbo Wealth Management LLC | 0.06% | Add +57.4% | 17,986 | $172K |
| Man Group plc | 0.00% | Reduce -8.3% | 17,952 | $172K |
| Susquehanna International Group, LLP | 0.00% | Reduce -18.8% | 17,414 | $166K |
| Bridgeway Capital Management, LLC | 0.00% | Add +8.6% | 15,225 | $146K |
| State Street Corp. | 0.00% | No change | 14,009 | $134K |
| Citadel Advisors | 0.00% | New | 12,258 | $117K |
| American Century Companies Inc. | 0.00% | New | 11,799 | $113K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -5.8% | 10,182 | $97K |
| FMR LLC | 0.00% | Reduce -67.8% | 5,659 | $54K |
| Barclays PLC | 0.00% | Add +14.6% | 3,431 | $33K |
| Morgan Stanley | 0.00% | Reduce -23.0% | 2,300 | $22K |
| UBS Group AG | 0.00% | Reduce -88.3% | 767 | $7K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +3.4% | 361 | $3K |
| BNP Paribas Financial Markets | 0.00% | No change | 302 | $3K |
| Northwestern Mutual Wealth Management Co. | 0.00% | No change | 260 | $2K |
| Rhumbline Advisers | 0.00% | No change | 190 | $2K |
| Wells Fargo & Company | 0.00% | New | 145 | $1K |
| Ameriflex Group, Inc. | 0.00% | New | 83 | $793 |
| SBI Securities Co., Ltd. | 0.00% | No change | 67 | $641 |
| EverSource Wealth Advisors, LLC | 0.00% | No change | 55 | $526 |
| Bank of America Corp. | 0.00% | Add +5.4% | 39 | $373 |
| JPMorgan Chase & Co. | 0.00% | Reduce -99.9% | 7 | $67 |
| Frazier Financial Advisors, LLC | 0.00% | No change | 1 | $10 |
| Avion Wealth | 0.00% | New | 33 | $0 |
"% of holder's portfolio" is ASMB's weight in each manager's 13F, not the share of Assembly Biosciences Inc. the manager owns.