13F HOLDINGS REPORT
EcoR1 Capital, LLC
Quarter ended Q2 2025 · Filed August 14, 2025 · Accession 0000935836-25-000506
Total Value
$1.69B
Positions
37
Other Managers
0
Confidential Omitted
No
Holdings (37)
| # | Issuer | Ticker / CUSIP | Shares | Value | % of Filing |
|---|---|---|---|---|---|
| 1 | ZYMEWORKS INC | ZYME | 22,970,388 | $288.3M | 17.06% |
| 2 | APELLIS PHARMACEUTICALS INC | APLS | 11,895,808 | $205.9M | 12.19% |
| 3 | JAZZ PHARMACEUTICALS PLC | JAZZ | 1,706,469 | $181.1M | 10.72% |
| 4 | ANAPTYSBIO INC | ANABV | 7,880,094 | $174.9M | 10.36% |
| 5 | CRINETICS PHARMACEUTICALS IN | CRNX | 4,288,120 | $123.3M | 7.30% |
| 6 | ITEOS THERAPEUTICS INC | 46565G104 | 10,688,978 | $106.6M | 6.31% |
| 7 | CRISPR THERAPEUTICS AG | CRSP | 1,389,276 | $67.6M | 4.00% |
| 8 | UNIQURE NV | QURE | 3,988,971 | $55.6M | 3.29% |
| 9 | TANGO THERAPEUTICS INC | TNGX | 10,630,736 | $54.4M | 3.22% |
| 10 | XENCOR INC | XNCR | 6,144,767 | $48.3M | 2.86% |
| 11 | IMMUNOME INC | IMNM | 4,079,415 | $37.9M | 2.25% |
| 12 | JANUX THERAPEUTICS INC | JANX | 1,469,818 | $34.0M | 2.01% |
| 13 | GALAPAGOS NV | GLPGF | 1,036,945 | $29.0M | 1.72% |
| 14 | ETON PHARMACEUTICALS INC | ETON | 2,030,544 | $28.9M | 1.71% |
| 15 | KURA ONCOLOGY INC | KURA | 4,200,000 | $24.2M | 1.43% |
| 16 | AKERO THERAPEUTICS INC | 00973Y108 | 440,000 | $23.5M | 1.39% |
| 17 | MADRIGAL PHARMACEUTICALS INC | MDGL | 75,000 | $22.7M | 1.34% |
| 18 | NEUROGENE INC | NGNE | 1,271,342 | $19.0M | 1.13% |
| 19 | VERONA PHARMA PLC | 925050106 | 200,000 | $18.9M | 1.12% |
| 20 | TECTONIC THERAPEUTIC INC | TECX | 935,121 | $18.6M | 1.10% |
| 21 | ORIC PHARMACEUTICALS INC | ORIC | 1,618,068 | $16.4M | 0.97% |
| 22 | ALKERMES PLC | ALKS | 500,000 | $14.3M | 0.85% |
| 23 | AVIDITY BIOSCIENCES INC | 05370A108 | 500,000 | $14.2M | 0.84% |
| 24 | MBX BIOSCIENCES INC | MBX | 1,149,794 | $13.1M | 0.78% |
| 25 | VOYAGER THERAPEUTICS INC | VYGR | 3,917,546 | $12.2M | 0.72% |
| 26 | PACIRA BIOSCIENCES INC | PCRX | 457,471 | $10.9M | 0.65% |
| 27 | REPLIMUNE GROUP INC | REPL | 850,341 | $7.9M | 0.47% |
| 28 | METSERA INC | 59267L107 | 271,529 | $7.7M | 0.46% |
| 29 | ADAPTIMMUNE THERAPEUTICS PLC | ADTI | 27,404,070 | $6.6M | 0.39% |
| 30 | DAY ONE BIOPHARMACEUTICALS I | DAWN | 862,068 | $5.6M | 0.33% |
| 31 | HILLEVAX INC | 43157M102 | 2,420,243 | $4.8M | 0.29% |
| 32 | ATARA BIOTHERAPEUTICS INC | ATRA | 573,183 | $4.4M | 0.26% |
| 33 | WHITEHAWK THERAPEUTICS INC | WHWK | 1,091,417 | $2.0M | 0.12% |
| 34 | MACROGENICS INC | MGNX | 1,602,717 | $1.9M | 0.11% |
| 35 | UNIQURE NV | QURE | 135,000 | $1.9M | 0.11% |
| 36 | NUVATION BIO INC | NUVB | 963,333 | $1.9M | 0.11% |
| 37 | SURROZEN INC | SRZNW | 66,665 | $595,985 | 0.04% |