EcoR1 Capital, LLC Q4 2025 Filing
Filed February 17, 2026
Portfolio Value
$2.2T
Holdings
28
Report Date
Q4 2025
Filing Type
13F-HR
All Holdings (28 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | ZYMEZYMEWORKS INC | 22,970,388 | $604.8B | 27.44% | |
| 2 | ANABANAPTYSBIO INC | 7,880,094 | $382.0B | 17.33% | |
| 3 | JAZZJAZZ PHARMACEUTICALS PLC | 1,706,469 | $290.1B | 13.16% | |
| 4 | CRNXCRINETICS PHARMACEUTICALS IN | 4,288,120 | $199.6B | 9.06% | |
| 5 | CNTACENTESSA PHARMACEUTICALS PLC | 3,115,000 | $77.9B | 3.53% | |
| 6 | CRSPCRISPR THERAPEUTICS AG | 1,389,276 | $72.9B | 3.31% | |
| 7 | MBXMBX BIOSCIENCES INC | 2,123,604 | $67.0B | 3.04% | |
| 8 | IMNMIMMUNOME INC | 2,855,590 | $61.3B | 2.78% | |
| 9 | ORICORIC PHARMACEUTICALS INC | 6,728,116 | $55.0B | 2.50% | |
| 10 | GLPGGALAPAGOS NV | 1,667,119 | $54.5B | 2.47% | |
| 11 | XNCRXENCOR INC | 3,318,612 | $50.8B | 2.31% | Call |
| 12 | CGONCG ONCOLOGY INC | 1,064,800 | $44.2B | 2.01% | Call |
| 13 | BBOTBRIDGEBIO ONCOLOGY THERAPEUT | 2,823,126 | $35.3B | 1.60% | |
| 14 | ETONETON PHARMACEUTICALS INC | 2,030,544 | $34.3B | 1.56% | |
| 15 | ZBIOZENAS BIOPHARMA INC | 789,500 | $28.7B | 1.30% | |
| 16 | NGNENEUROGENE INC | 1,271,342 | $26.2B | 1.19% | |
| 17 | GPCRSTRUCTURE THERAPEUTICS INC | 334,380 | $23.3B | 1.06% | |
| 18 | PCVXVAXCYTE INC | 450,000 | $20.8B | 0.94% | |
| 19 | AQSTAQUESTIVE THERAPEUTICS INC | 2,625,000 | $17.0B | 0.77% | |
| 20 | VYGRVOYAGER THERAPEUTICS INC | 4,002,847 | $15.7B | 0.71% | |
| 21 | ATRAATARA BIOTHERAPEUTICS INC | 573,183 | $10.4B | 0.47% | |
| 22 | MNKDMANNKIND CORP | 1,660,000 | $9.4B | 0.43% | |
| 23 | NUVB/WSNUVATION BIO INC | 963,333 | $8.6B | 0.39% | |
| 24 | EOLSEVOLUS INC | 675,000 | $4.5B | 0.20% | |
| 25 | IBIOIBIO INC | 2,228,000 | $4.3B | 0.20% | |
| 26 | MREOMEREO BIOPHARMA GROUP PLC | 7,856,466 | $3.3B | 0.15% | |
| 27 | CAMPCAMP4 THERAPEUTICS CORP | 325,000 | $2.0B | 0.09% | |
| 28 | SRZNWSURROZEN INC | 4,444 | $100.0M | 0.00% |