EcoR1 Capital, LLC
Securities ▲▼ | Shares | Value ($K) | |||||
|---|---|---|---|---|---|---|---|
Q4 2025 ▲▼ | Q1 2026 ▲▼ | Change ▲▼ | Q4 2025 ▲▼ | Q1 2026 ▲▼ | Weight (%) ▲▼ | Change ▲▼ | |
| CENTESSA PHARMACEUTICALS PLC(CNTA) | 0 | 6,000,000 | +6,000,000 | 0 | 238,320,000 | 10.18% | +238,320,000 |
| AKTIS ONCOLOGY INC(AKTS) | 0 | 4,824,469 | +4,824,469 | 0 | 86,309,750 | 3.69% | +86,309,750 |
| ANAPTYSBIO INC | 0 | 7,880,094 | +7,880,094 | 0 | 437,030,013 | 18.68% | +437,030,013 |
| CG ONCOLOGY INC(CGON) | 0 | 1,102,000 | +1,102,000 | 0 | 74,583,360 | 3.19% | +74,583,360 |
| JAZZ PHARMACEUTICALS PLC(JAZZ) | 0 | 1,706,469 | +1,706,469 | 0 | 322,607,964 | 13.79% | +322,607,964 |
| ORIC PHARMACEUTICALS INC | 0 | 6,728,116 | +6,728,116 | 0 | 85,245,230 | 3.64% | +85,245,230 |
| ETON PHARMACEUTICALS INC | 0 | 2,171,938 | +2,171,938 | 0 | 53,603,430 | 2.29% | +53,603,430 |
| RELAY THERAPEUTICS INC(RLAY) | 0 | 1,904,762 | +1,904,762 | 0 | 18,952,382 | 0.81% | +18,952,382 |
| CENTESSA PHARMACEUTICALS PLC(CNTA)(Call) | 0 | 410,800 | +410,800 | 0 | 16,316,976 | — | +16,316,976 |
| ERASCA INC(ERAS) | 0 | 900,000 | +900,000 | 0 | 14,562,000 | 0.62% | +14,562,000 |
| EIKON THERAPEUTICS INC | 0 | 732,606 | +732,606 | 0 | 7,750,971 | 0.33% | +7,750,971 |
| REPLIMUNE GROUP INC | 0 | 1,000,000 | +1,000,000 | 0 | 7,650,000 | 0.33% | +7,650,000 |
| ZURA BIO LTD | 0 | 1,179,715 | +1,179,715 | 0 | 7,019,304 | 0.30% | +7,019,304 |
| PHATHOM PHARMACEUTICALS INC | 0 | 625,000 | +625,000 | 0 | 6,943,750 | 0.30% | +6,943,750 |
| STOKE THERAPEUTICS INC(STOK) | 0 | 100,000 | +100,000 | 0 | 3,256,000 | 0.14% | +3,256,000 |
| PRELUDE THERAPEUTICS INC | 0 | 947,049 | +947,049 | 0 | 3,238,908 | 0.14% | +3,238,908 |
| HELIX ACQUISITION CORP III USD | 0 | 200,000 | +200,000 | 0 | 2,032,000 | 0.09% | +2,032,000 |
| MEREO BIOPHARMA GROUP PLC | 0 | 13,368,855 | +13,368,855 | 0 | 4,411,722 | 0.19% | +4,411,722 |
| SURROZEN INC | 0 | 4,444 | +4,444 | 0 | 129,454 | 0.01% | +129,454 |
| NEUROGENE INC | 0 | 1,271,342 | +1,271,342 | 0 | 25,630,255 | 1.10% | +25,630,255 |
| XENCOR INC(XNCR)(Call) | 0 | 0 | 0 | 0 | 0 | — | 0 |
| IBIO INC | 0 | 1,583,000 | +1,583,000 | 0 | 3,007,700 | 0.13% | +3,007,700 |
| CAMP4 THERAPEUTICS CORP | 0 | 0 | 0 | 0 | 0 | — | 0 |
| EVOLUS INC | 0 | 0 | 0 | 0 | 0 | — | 0 |
| GALAPAGOS NV(GLPG) | 0 | 1,667,119 | +1,667,119 | 0 | 50,013,570 | 2.14% | +50,013,570 |
| CRISPR THERAPEUTICS AG(CRSP) | 0 | 1,389,276 | +1,389,276 | 0 | 66,087,859 | 2.82% | +66,087,859 |
| NUVATION BIO INC(NUVB) | 0 | 0 | 0 | 0 | 0 | — | 0 |
| MANNKIND CORP(MNKD) | 0 | 0 | 0 | 0 | 0 | — | 0 |
| ATARA BIOTHERAPEUTICS INC | 0 | 99,593 | +99,593 | 0 | 471,075 | 0.02% | +471,075 |
| BRIDGEBIO ONCOLOGY THERAPEUT | 0 | 2,823,126 | +2,823,126 | 0 | 25,266,978 | 1.08% | +25,266,978 |
| CG ONCOLOGY INC(CGON)(Call) | 0 | 0 | 0 | 0 | 0 | — | 0 |
| ZENAS BIOPHARMA INC(ZBIO) | 0 | 789,500 | +789,500 | 0 | 15,434,725 | 0.66% | +15,434,725 |
| VOYAGER THERAPEUTICS INC | 0 | 0 | 0 | 0 | 0 | — | 0 |
| AQUESTIVE THERAPEUTICS INC | 0 | 0 | 0 | 0 | 0 | — | 0 |
| VAXCYTE INC(PCVX) | 0 | 0 | 0 | 0 | 0 | — | 0 |
| STRUCTURE THERAPEUTICS INC | 0 | 0 | 0 | 0 | 0 | — | 0 |
| XENCOR INC(XNCR) | 0 | 2,183,000 | +2,183,000 | 0 | 26,326,980 | 1.13% | +26,326,980 |
| ZYMEWORKS INC(ZYME) | 0 | 22,970,388 | +22,970,388 | 0 | 575,178,516 | 24.58% | +575,178,516 |
| MBX BIOSCIENCES INC(MBX) | 0 | 777,000 | +777,000 | 0 | 23,193,450 | 0.99% | +23,193,450 |
| CRINETICS PHARMACEUTICALS IN(CRNX) | 0 | 4,288,120 | +4,288,120 | 0 | 155,744,518 | 6.66% | +155,744,518 |
| IMMUNOME INC(IMNM) | 0 | 0 | 0 | 0 | 0 | — | 0 |