| Sym | Company | Class | Ownership | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|---|
| ZYME | Zymeworks Inc. | Common Stock | 30.7% | $260M | $59.6M | 23M | +29.8% | EcoR1 Capital, LLC | Jun 26, 2025 |
| ITOS | iTeos Therapeutics, Inc. | Common Stock | 27.9% | $78.6M | $36.4M | 10.7M | +86.5% | EcoR1 Capital, LLC | May 15, 2025 |
| GLPG | Galapagos NV | Ordinary Shares, no par value | 13.22% | $221M | $23.1M | 8.71M | +11.7% | EcoR1 Capital, LLC | Jul 24, 2025 |
| TNGX | Tango Therapeutics, Inc. | Common Stock | 9.9% | $13.5M | 10.6M | EcoR1 Capital, LLC | Dec 31, 2024 | ||
| ALVR | Allovir, Inc. | Common Stock | 8.1% | $3.89M | 409K | EcoR1 Capital, LLC | Dec 31, 2024 | ||
| ETON | Eton Pharmaceuticals, Inc. | Common Stock | 7.7% | $25.1M | 1.98M | EcoR1 Capital, LLC | Dec 31, 2024 | ||
| QURE | uniQure N.V. | Ordinary Shares, par value(euro)0.05 per share | 7.5% | $33.3M | 3.63M | EcoR1 Capital, LLC | Dec 10, 2024 | ||
| ORIC | ORIC Pharmaceuticals, Inc. | Common Stock | 6.9% | $35.7M | 6.73M | EcoR1 Capital, LLC | Jul 29, 2025 | ||
| HLVX | HilleVax, Inc. | Common Stock | 5.8% | $5.49M | 2.89M | EcoR1 Capital, LLC | Jul 17, 2025 | ||
| TECX | Tectonic Therapeutic, Inc. | Common Stock | 5% | $15.6M | 935K | EcoR1 Capital, LLC | Mar 31, 2025 | ||
| KURA | Kura Oncology, Inc. | Common Stock | 4.8% | $25.3M | 4.2M | EcoR1 Capital, LLC | Jun 30, 2025 | ||
| IMNM | Immunome Inc. | Common Stock | 4.7% | $29M | 4.08M | EcoR1 Capital, LLC | Mar 31, 2025 | ||
| ADAP | Adaptimmune Therapeutics PLC | Ordinary Shares | 4.2% | $3.96M | 66M | EcoR1 Capital, LLC | Aug 15, 2025 | ||
| AVIR | Atea Pharmaceuticals, Inc. | Common Stock | 4% | $9.99M | 3.34M | EcoR1 Capital, LLC | Dec 31, 2024 | ||
| HOOK | HOOKIPA Pharma Inc. | Common Stock | 4% | $292K | 389K | EcoR1 Capital, LLC | Dec 31, 2024 | ||
| ALGS | Aligos Therapeutics, Inc. | Common Stock | 3.9% | $859K | 211K | EcoR1 Capital, LLC | Mar 31, 2025 | ||
| WHWK | Aadi Bioscience, Inc. | Common Stock | 1.4% | $570K | 345K | EcoR1 Capital, LLC | Dec 31, 2024 | ||
| TCRX | TScan Therapeutics, Inc. | Voting Common Stock | 1.3% | $842K | 663K | EcoR1 Capital, LLC | Mar 31, 2025 | ||
| KLRS | Kalaris Therapeutics, Inc. | Common Stock | 1.1% | $1.62M | 202K | EcoR1 Capital, LLC | Mar 31, 2025 | ||
| THRD | Third Harmonic Bio, Inc. | Common Stock | 0% | $0 | 0 | EcoR1 Capital, LLC | Mar 31, 2025 | ||
| MRSN | Mersana Therapeutics, Inc. | Common Stock | 0% | $0 | -$3.47M | 0 | -100% | EcoR1 Capital, LLC | Mar 31, 2025 |
| PRTA | PROTHENA CORP PUBLIC LTD CO | Ordinary Shares | 0% | $0 | -$40.3M | 0 | -100% | EcoR1 Capital, LLC | May 27, 2025 |
| ARVN | ARVINAS, INC. | Common Stock | 0% | $0 | 0 | EcoR1 Capital, LLC | Mar 31, 2025 |
| Sym | Target | Class | Ownership | Change | Current Shares | Change | Value | Reporting name | Form | Report Period | Date Filed |
|---|