Sutro Biopharma Ownership | Who Owns Sutro Biopharma?
Sutro Biopharma Ownership Summary
Sutro Biopharma is owned by 0.21% institutional investors, 4.69% insiders, and 95.11% retail investors. Blackrock is the largest institutional shareholder, holding 11.24% of STRO shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.88% of its assets in Sutro Biopharma shares.
STRO Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Sutro Biopharma | 0.21% | 4.69% | 95.11% |
| Sector | Healthcare Stocks | 232.63% | 10.66% | -143.29% |
| Industry | Biotech Stocks | 382.12% | 10.42% | -292.54% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 6.91M | 11.24% | $20.25M |
| Affinity asset advisors | 748.38K | 8.82% | $8.66B |
| Suvretta capital management | 6.49M | 7.67% | $5.63M |
| Kynam capital management, lp | 5.09M | 6.02% | $4.42M |
| Tang capital management | 2.83M | 3.34% | $2.46M |
| Merck | 2.72M | 3.22% | $2.37M |
| Vestal point capital, lp | 2.60M | 3.07% | $2.26M |
| Eversept partners, lp | 2.29M | 2.71% | $1.99M |
| Samsara biocapital | 2.20M | 2.60% | $1.91M |
| Adage capital partners gp | 2.00M | 2.36% | $1.74M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Merck | 2.72M | 1.04% | $2.37M |
| Aju ib investment | 17.50K | 0.89% | $202.47K |
| Affinity asset advisors | 748.38K | 0.49% | $8.66B |
| Kynam capital management, lp | 5.09M | 0.33% | $4.42M |
| Samsara biocapital | 2.20M | 0.25% | $1.91M |
| Suvretta capital management | 6.49M | 0.14% | $5.63M |
| Eversept partners, lp | 2.29M | 0.14% | $1.99M |
| Vestal point capital, lp | 2.60M | 0.10% | $2.26M |
| Tang capital management | 2.83M | 0.09% | $2.46M |
| Dafna capital management | 437.08K | 0.09% | $379.56K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 6.91M | 0.00% | 1.21M |
| Affinity asset advisors | 748.38K | 0.49% | 748.38K |
| Millennium management | 703.15K | 0.00% | 297.54K |
| Two sigma investments, lp | 396.79K | 0.00% | 281.72K |
| Tang capital management | 2.83M | 0.09% | 267.13K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Ra capital management | - | - | -4.43M |
| Vanguard group | - | - | -3.68M |
| Acadian asset management | - | - | -3.39M |
| Velan capital investment management lp | - | - | -3.12M |
| Point72 asset management | - | - | -2.20M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Affinity asset advisors | 748.38K | 0.49% | 748.38K | $8.66B |
| Marshall wace, llp | 85.61K | 0.00% | 85.61K | $990.57M |
| Nomura | 43.43K | 0.00% | 43.43K | $127.24K |
| Jane street group | 22.95K | - | 22.95K | $265.47K |
| Omers administration | 11.02K | 0.00% | 11.02K | $127.54K |
Sold Out
| Holder | Change |
|---|---|
| Sbi securities | -2.00 |
| Farther finance advisors | -9.00 |
| Nelson, van denburg & campbell wealth management group | -13.00 |
| Allspring global investments | -15.00 |
| Group one trading | -20.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2025 | 3 | -96.51% | 17,606 | -99.97% | - | 0.01% | 1 | -96.55% | 2 | -93.94% |
| Sep 30, 2025 | 26 | -74.26% | 4,544,952 | -91.82% | 5 | 0.12% | 6 | -88.68% | 12 | -50.00% |
| Jun 30, 2025 | 100 | -14.53% | 55,566,817 | -9.91% | 65 | 1.19% | 52 | -10.34% | 24 | -27.27% |
| Mar 31, 2025 | 9 | -92.74% | 19,888,115 | -68.79% | 23 | 0.40% | 7 | -89.06% | - | -100.00% |
| Dec 31, 2024 | 121 | -9.70% | 63,450,822 | 1.49% | 77 | 1.33% | 62 | -15.07% | 35 | 9.38% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 2.42M | 2.88% | - |
| Vanguard Total Stock Mkt Idx Inv | 235.62K | 1.44% | - |
| Baillie Gifford Global Discovery A Acc | 904.60K | 1.10% | -13.25K |
| Fidelity Small Cap Index | 835.21K | 0.99% | -23.86K |
| iShares Russell 2000 Value ETF | 728.08K | 0.86% | - |
| Edinburgh Worldwide Ord | 555.93K | 0.67% | -194.80K |
| State St Russell Sm/Mid Cp® Indx NL Cl C | 502.75K | 0.60% | - |
| State St Russell Sm/Mid Cp® Indx SL Cl I | 502.75K | 0.60% | - |
| Goldman Sachs Small Cp Val Insghts Instl | 467.61K | 0.55% | - |
| iShares Biotechnology ETF | 467.05K | 0.55% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Oct 15, 2025 | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | Buy | $13.61K |
| Oct 15, 2025 | Chow Gregory K. | CFO | Buy | $16.00K |
| Oct 15, 2025 | Chung Jane | Chief Executive Officer | Buy | $10.01K |
| Oct 15, 2025 | MATSUI CONNIE | - | Buy | $39.95K |
| Oct 15, 2025 | Pauling David | Chief Admin. Ofcr. & GC | Buy | $9.99K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | - | - |
| 2025 Q4 | 5 | - |
| 2025 Q3 | - | - |
| 2025 Q2 | - | - |
| 2025 Q1 | - | - |
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