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.
13F holders, Q1 2025
Institutional positions in Assembly Biosciences, Inc. as of Mar 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 37
- +2 vs. Q4 2024
- Shares held
- 3.18M
- −10.1K (−0.3%) vs. Q4 2024
- Total value
- $30.4M
- −$19.9M (−39.6%) vs. Q4 2024
- New holders
- 6
- 11 more added
- Sold out
- 4
- 10 more reduced
Compare with Q4 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ASMB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 92 | $514.8M |
| Q1 2026 | 75 | $381.5M |
| Q4 2025 | 69 | $466.7M |
| Q3 2025 | 57 | $324.9M |
| Q2 2025 | 33 | $57.1M |
| Q1 2025 | 37 | $30.4M |
| Q4 2024 | 35 | $50.3M |
| Q3 2024 | 30 | $15.6M |
| Q2 2024 | 27 | $16.1M |
| Q1 2024 | 24 | $8.68M |
| Q4 2023 | 45 | $7.12M |
| Q3 2023 | 32 | $8.62M |
| Q2 2023 | 32 | $12.0M |
| Q1 2023 | 38 | $11.1M |
| Q4 2022 | 40 | $18.4M |
| Q3 2022 | 50 | $27.2M |
| Q2 2022 | 54 | $36.1M |
| Q1 2022 | 54 | $39.3M |
| Q4 2021 | 62 | $54.3M |
| Q3 2021 | 65 | $79.0M |
| Q2 2021 | 91 | $105.1M |
| Q1 2021 | 107 | $133.6M |
Institutions, Q1 2025
Shares, value and share of portfolio for each institution holding Assembly Biosciences, Inc.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Gilead Sciences, Inc. | 2,209,471 | $21.1M | 1.79% | 00.0% | Unchanged |
| Vanguard Group Inc | 215,983 | $2.06M | 0.00% | +15,525+7.7% | Added |
| B Group, Inc. | 200,000 | $1.91M | 1.66% | +149,349+294.9% | Added |
| Renaissance Technologies LLC | 113,311 | $1.08M | 0.00% | +18,600+19.6% | Added |
| BlackRock, Inc. | 78,988 | $755.1K | 0.00% | −2,541−3.1% | Reduced |
| Geode Capital Management, LLC | 47,703 | $456.2K | 0.00% | +1,068+2.3% | Added |
| Monimus Capital Management, LP | 42,067 | $402.2K | 0.34% | 00.0% | Unchanged |
| Northern Trust Corp | 28,323 | $270.8K | 0.00% | −326−1.1% | Reduced |
| Federated Hermes, Inc. | 25,394 | $242.8K | 0.00% | 00.0% | Unchanged |
| Armistice Capital, LLC | 23,858 | $228.1K | 0.01% | −144,216−85.8% | Reduced |
| Acadian Asset Management LLC | 23,027 | $219.0K | 0.00% | +6,823+42.1% | Added |
| Squarepoint Ops LLC | 18,982 | $181.5K | 0.00% | +18,982 | New |
| Marshall Wace, LLP | 18,040 | $172.5K | 0.00% | +3,217+21.7% | Added |
| Palumbo Wealth Management LLC | 17,986 | $171.9K | 0.06% | +6,559+57.4% | Added |
| Man Group plc | 17,952 | $171.6K | 0.00% | −1,615−8.3% | Reduced |
| Susquehanna International Group, LLP | 17,414 | $166.5K | 0.00% | −4,040−18.8% | Reduced |
| Bridgeway Capital Management, LLC | 15,225 | $145.6K | 0.00% | +1,200+8.6% | Added |
| State Street Corp | 14,009 | $133.9K | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 12,258 | $117.2K | 0.00% | +12,258 | New |
| American Century Companies Inc | 11,799 | $112.8K | 0.00% | +11,799 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 10,182 | $97.3K | 0.00% | −631−5.8% | Reduced |
| FMR LLC | 5,659 | $54.1K | 0.00% | −11,907−67.8% | Reduced |
| Barclays PLC | 3,431 | $32.8K | 0.00% | +437+14.6% | Added |
| Morgan Stanley | 2,300 | $22.0K | 0.00% | −686−23.0% | Reduced |
| UBS Group AG | 767 | $7.33K | 0.00% | −5,780−88.3% | Reduced |
| Tower Research Capital LLC (TRC) | 361 | $3.45K | 0.00% | +12+3.4% | Added |
| BNP Paribas Arbitrage, SA | 302 | $2.89K | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 260 | $2.49K | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 190 | $1.82K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 145 | $1.39K | 0.00% | +145 | New |
| Ameriflex Group, Inc. | 83 | $793 | 0.00% | +83 | New |
| SBI Securities Co., Ltd. | 67 | $641 | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 55 | $526 | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 39 | $373 | 0.00% | +2+5.4% | Added |
| JPMorgan Chase & Co | 7 | $67 | 0.00% | −11,420−99.9% | Reduced |
| Frazier Financial Advisors, LLC | 1 | $10 | 0.00% | 00.0% | Unchanged |
| Avion Wealth | 33 | $0 | 0.00% | +33 | New |
| Peapod Lane Capital LLC | 0 | $0 | 0.00% | −62,970−100.0% | Sold out |
| Marquette Asset Management, LLC | 0 | $0 | 0.00% | −9,016−100.0% | Sold out |
| GWM Advisors LLC | 0 | $0 | 0.00% | −846−100.0% | Sold out |
| Advisor Group Holdings, Inc. | 0 | $0 | 0.00% | −187−100.0% | Sold out |