Institutional Holders (2026 Q1)
157 + investorsExplore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in ERAS. Verified SEC 13F-HR filings.
| # | Investor | % of Portfolio | Shares | Mkt Value |
|---|---|---|---|---|
| 1 | ARCH Venture Management, LLC | 16.95% | 7,091,557 | $114.7M |
| 2 | Vivo Capital, LLC | 16.41% | 12,151,480 | $196.6M |
| 3 | 5AM Venture Management, LLC | 15.66% | 3,485,971 | $56.4M |
| 4 | Frazier Life Sciences Management, L.P. | 10.27% | 24,675,188 | $399.2M |
| 5 | Venrock Adviser, LLC | 9.89% | 16,382,812 | $265.1M |
| 6 | Logos Global Management LP | 9.01% | 11,150,000 | $180.4M |
| 7 | Siren, L.L.C. | 5.04% | 11,244,246 | $181.9M |
| 8 | Cormorant Asset Management, LP | 4.71% | 5,800,000 | $93.8M |
| 9 | Affinity Asset Advisors, LLC | 4.47% | 5,350,000 | $86.6M |
| 10 | KVP Capital Advisors, LP | 4.11% | 340,000 | $5.5M |
| 11 | ACUTA CAPITAL PARTNERS, LLC | 4.05% | 354,575 | $5.7M |
| 12 | a16z Capital Management, L.L.C. | 3.59% | 2,862,500 | $46.3M |
| 13 | Paradigm Biocapital Advisors LP | 3.44% | 10,392,702 | $168.2M |
| 14 | SILVERARC CAPITAL MANAGEMENT, LLC | 3.06% | 1,851,812 | $30.0M |
| 15 | Commodore Capital LP | 2.97% | 3,175,000 | $51.4M |
| 16 | RTW INVESTMENTS, LP | 2.60% | 16,157,175 | $261.4M |
| 17 | Spruce Street Capital LP | 1.64% | 422,543 | $6.8M |
| 18 | First Turn Management, LLC | 1.57% | 867,639 | $14.0M |
| 19 | SUVRETTA CAPITAL MANAGEMENT, LLC | 1.42% | 3,434,967 | $55.6M |
| 20 | Seven Fleet Capital Management LP | 1.14% | 222,468 | $3.6M |
| 21 | Rock Springs Capital Management LP | 1.05% | 1,103,469 | $17.9M |
| 22 | HighVista Strategies LLC | 0.81% | 181,069 | $2.9M |
| 23 | STEMPOINT CAPITAL LP | 0.75% | 239,861 | $3.9M |
| 24 | Parkman Healthcare Partners LLC | 0.68% | 406,702 | $6.6M |
| 25 | EcoR1 Capital, LLC | 0.62% | 900,000 | $14.6M |
| Investor | Ownership History |
% of Portfolio | Prev % | Rank | Conviction | Avg Buy Price | 13F Score™ 3Y / 7Y | Sell Timing | Shares | Mkt Value | Change | Change % | Source | Quarter | Filed |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|