Q1 2025 · 13F-HR
EcoR1 Capital, LLCholdings as filed
Filed 2025-05-15 · accession 0000935836-25-000338
$1.69B
Reported value
46
Positions
2025-03-31
Period end
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 03753U106 | APLSUSD | APELLIS PHARMACEUTICALS INC | $260.2M | 15.4% | 11,895,808 | Common | SOLE |
| G50871105 | JAZZ | JAZZ PHARMACEUTICALS PLC | $211.9M | 12.6% | 1,706,469 | Common | SOLE |
| 98985Y108 | ZYME | ZYMEWORKS INC | $205.6M | 12.2% | 17,259,548 | Common | SOLE |
| 032724106 | ANAB | ANAPTYSBIO INC | $146.5M | 8.69% | 7,880,094 | Common | SOLE |
| 22663K107 | CRNX | CRINETICS PHARMACEUTICALS IN | $143.8M | 8.53% | 4,288,120 | Common | SOLE |
| G72800108 | PRTA | PROTHENA CORP PLC | $143.4M | 8.50% | 11,584,280 | Common | SOLE |
| 803607100 | SRPT | SAREPTA THERAPEUTICS INC | $82.5M | 4.89% | 1,292,386 | Common | SOLE |
| 98401F105 | XNCR | XENCOR INC | $65.4M | 3.88% | 6,144,767 | Common | SOLE |
| H17182108 | CRSP | CRISPR THERAPEUTICS AG | $47.3M | 2.80% | 1,389,276 | Common | SOLE |
| N90064101 | QURE | UNIQURE NV | $42.3M | 2.51% | 3,988,971 | Common | SOLE |
| 47103J105 | JANX | JANUX THERAPEUTICS INC | $39.7M | 2.35% | 1,469,818 | Common | SOLE |
| 45257U108 | IMNM | IMMUNOME INC | $27.5M | 1.63% | 4,079,415 | Common | SOLE |
| 29772L108 | ETON | ETON PHARMACEUTICALS INC | $25.2M | 1.49% | 1,939,288 | Common | SOLE |
| 558868105 | MDGL | MADRIGAL PHARMACEUTICALS INC | $24.8M | 1.47% | 75,000 | Common | SOLE |
| 68622P109 | ORIC | ORIC PHARMACEUTICALS INC | $19.1M | 1.13% | 3,418,068 | Common | SOLE |
| 00973Y108 | AKRO | AKERO THERAPEUTICS INC | $17.8M | 1.06% | 440,000 | Common | SOLE |
| 50127T109 | KURA | KURA ONCOLOGY INC | $17.4M | 1.03% | 2,640,298 | Common | SOLE |
| 878972108 | TECX | TECTONIC THERAPEUTIC INC | $16.6M | 0.98% | 935,121 | Common | SOLE |
| 05370A108 | RNAGBP | AVIDITY BIOSCIENCES INC | $16.5M | 0.98% | 557,576 | Common | SOLE |
| 64135M105 | NGNE | NEUROGENE INC | $14.9M | 0.88% | 1,271,342 | Common | SOLE |
| 87583X109 | TNGX | TANGO THERAPEUTICS INC | $14.6M | 0.86% | 10,630,736 | Common | SOLE |
| 92915B106 | VYGR | VOYAGER THERAPEUTICS INC | $13.2M | 0.79% | 3,917,546 | Common | SOLE |
| 07373V105 | BEAM | BEAM THERAPEUTICS INC | $10.3M | 0.61% | 526,685 | Common | SOLE |
| 55287L101 | MBX | MBX BIOSCIENCES INC | $9.3M | 0.55% | 1,259,273 | Common | SOLE |
| 37611X209 | DNA | GINKGO BIOWORKS HOLDINGS INC | $8.3M | 0.49% | 1,462,328 | Common | SOLE |
| 76029N106 | REPL | REPLIMUNE GROUP INC | $8.3M | 0.49% | 850,341 | Common | SOLE |
| 088786108 | BCYC | BICYCLE THERAPEUTICS PLC | $7.7M | 0.46% | 910,000 | Common | SOLE |
| 23954D109 | DAWNGBX | DAY ONE BIOPHARMACEUTICALS I | $6.8M | 0.41% | 862,068 | Common | SOLE |
| 92539P101 | — | VERVE THERAPEUTICS INC | $5.7M | 0.34% | 1,250,000 | Common | SOLE |
| 00653A107 | ADAPY | ADAPTIMMUNE THERAPEUTICS PLC | $5.4M | 0.32% | 27,404,070 | Common | SOLE |
| 36315X101 | LKFT | GALAPAGOS NV | $3.9M | 0.23% | 155,006 | Common | SOLE |
| 00032Q104 | WHWK | WHITEHAWK THERAPEUTICS INC | $3.7M | 0.22% | 2,082,000 | Common | SOLE |
| 046513206 | ATRA | ATARA BIOTHERAPEUTICS INC | $3.4M | 0.20% | 573,183 | Common | SOLE |
| 83422E204 | SLDB | SOLID BIOSCIENCES INC | $2.8M | 0.16% | 744,450 | Common | SOLE |
| 492327101 | KROS | KEROS THERAPEUTICS INC | $1.9M | 0.11% | 187,500 | Common | SOLE |
| 67080N119 | NUVB/WS | NUVATION BIO INC | $1.7M | 0.10% | 963,333 | Common | SOLE |
| 75943R102 | RLAY | RELAY THERAPEUTICS INC | $1.7M | 0.10% | 641,426 | Common | SOLE |
| 482929106 | KLRS | KALARIS THERAPEUTICS INC | $1.6M | 0.10% | 201,718 | Common | SOLE |
| N90064101 | QURE | UNIQURE NV | $1.4M | 0.08% | 135,000 | CALL | SOLE |
| 74168J101 | PRME | PRIME MEDICINE INC | $1.4M | 0.08% | 700,000 | Common | SOLE |
| 59267L107 | — | METSERA INC | $1.4M | 0.08% | 50,000 | Common | SOLE |
| 89854M101 | TCRX | TSCAN THERAPEUTICS INC | $914,710 | 0.05% | 662,833 | Common | SOLE |
| 86889P117 | SRZNW | SURROZEN INC | $777,314 | 0.05% | 66,665 | Common | SOLE |
| 01626L204 | ALGS | ALIGOS THERAPEUTICS INC | $730,694 | 0.04% | 88,569 | Common | SOLE |
| 29772L108 | ETON | ETON PHARMACEUTICALS INC | $655,490 | 0.04% | 50,500 | CALL | SOLE |
| 91678A107 | UPB | UPSTREAM BIO INC | $367,200 | 0.02% | 60,000 | Common | SOLE |
Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.