Assembly Biosciences Ownership | Who Owns Assembly Biosciences?
Assembly Biosciences Ownership Summary
Assembly Biosciences is owned by 41.13% institutional investors, 38.52% insiders, and 20.36% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 1.17% of ASMB shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.01% of its assets in Assembly Biosciences shares.
ASMB Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Assembly Biosciences | 41.13% | 38.52% | 20.36% |
| Sector | Healthcare Stocks | 488.30% | 11.08% | -399.38% |
| Industry | Biotech Stocks | 307.10% | 11.11% | -218.21% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 89.67K | 1.17% | $1.62M |
| Ellsworth advisors | 29.95K | 0.39% | $851.78K |
| Acadian asset management | 20.42K | 0.27% | $369.00K |
| Palumbo wealth management | 18.67K | 0.24% | $338.25K |
| Raymond james financial | 250.00 | 0.00% | $4.53K |
| Eversource wealth advisors | 55.00 | 0.00% | $997.00 |
| Connor, clark & lunn investment management | - | - | - |
| Squarepoint ops | - | - | - |
| American century companies | - | - | - |
| Marshall wace, llp | - | - | - |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Ellsworth advisors | 29.95K | 0.18% | $851.78K |
| Palumbo wealth management | 18.67K | 0.10% | $338.25K |
| Acadian asset management | 20.42K | 0.00% | $369.00K |
| Connor, clark & lunn investment management | - | - | - |
| Squarepoint ops | - | - | - |
| Armistice capital | - | - | - |
| American century companies | - | - | - |
| Blackrock funding, inc. /de | 89.67K | - | $1.62M |
| Frazier financial advisors | - | - | - |
| Raymond james financial | 250.00 | - | $4.53K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Ellsworth advisors | 29.95K | 0.18% | 29.95K |
| Blackrock funding, inc. /de | 89.67K | - | 10.68K |
| Palumbo wealth management | 18.67K | 0.10% | 681.00 |
| Raymond james financial | 250.00 | - | 250.00 |
| Eversource wealth advisors | 55.00 | - | - |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Armistice capital | - | - | -23.86K |
| Squarepoint ops | - | - | -18.98K |
| Marshall wace, llp | - | - | -18.04K |
| American century companies | - | - | -11.80K |
| Connor, clark & lunn investment management | - | - | -10.18K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Ellsworth advisors | 29.95K | 0.18% | 29.95K | $851.78K |
| Raymond james financial | 250.00 | - | 250.00 | $4.53K |
Sold Out
| Holder | Change |
|---|---|
| Frazier financial advisors | -1.00 |
| Connor, clark & lunn investment management | -10.18K |
| American century companies | -11.80K |
| Marshall wace, llp | -18.04K |
| Squarepoint ops | -18.98K |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2025 | 34 | -5.56% | 3,148,666 | -0.85% | 41 | 2.30% | 13 | -18.75% | 8 | -20.00% |
| Mar 31, 2025 | 36 | 2.86% | 3,175,639 | -0.32% | 42 | 1.81% | 16 | -23.81% | 10 | 42.86% |
| Dec 31, 2024 | 35 | 16.67% | 3,185,761 | 210.20% | 48 | 18.52% | 21 | 61.54% | 7 | - |
| Sep 30, 2024 | 30 | 7.14% | 1,026,987 | -12.62% | 16 | 3.73% | 13 | -13.33% | 7 | 40.00% |
| Jun 30, 2024 | 28 | 16.67% | 1,175,256 | 81.57% | 20 | 14.95% | 15 | 1400.00% | 5 | -78.26% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 127.52K | 2.01% | -2.79K |
| Vanguard US Total Market Shares ETF | 114.78K | 1.53% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 68.61K | 1.08% | -32.59K |
| Franklin Biotechnology Discv A(acc)USD | 166.20K | 1.07% | 166.20K |
| Federated Hermes MDT Small Cap Growth IS | 25.39K | 0.33% | - |
| Federated Hermes MDT SCG Institutional | 25.39K | 0.33% | - |
| Vanguard Strategic Small-Cap Equity Inv | 17.72K | 0.23% | - |
| Bridgeway Ultra-Small Company Market | 13.75K | 0.22% | - |
| Fidelity Extended Market Index | 27.00K | 0.17% | 4.20K |
| Extended Equity Market Fund K | 13.08K | 0.17% | 8.11K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Aug 08, 2025 | GILEAD SCIENCES, INC. | - | Buy | $2.30K |
| Aug 08, 2025 | GILEAD SCIENCES, INC. | - | Buy | $24.80M |
| Aug 08, 2025 | GILEAD SCIENCES, INC. | - | Buy | $24.80M |
| Mar 31, 2025 | McHutchison John G | - | Sell | $7.46K |
| Mar 31, 2025 | Bjorkquist Jeanette M | Principal Accounting Officer | Sell | $1.77K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q2 | - | - |
| 2025 Q1 | - | 4 |
| 2024 Q4 | 6 | 3 |
| 2024 Q3 | 2 | 2 |
| 2024 Q2 | 2 | 10 |
ASMB Ownership FAQ
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