EcoR1 Capital, LLC

CIK: 0001587114Latest portfolio: $2.2B · Q4 2025

Holdings

28

Total Value

$2.2B

New Positions

9

Closed Positions

11

#StockSharesValue% PortfolioChangeType
1
ZYMEZYMEWORKS INC
22,970,388$604.8M27.44%
2
ANABANAPTYSBIO INC
7,880,094$382.0M17.33%
3
JAZZJAZZ PHARMACEUTICALS PLC
1,706,469$290.1M13.16%
4
CRNXCRINETICS PHARMACEUTICALS IN
4,288,120$199.6M9.06%
5
CNTACENTESSA PHARMACEUTICALS PLC
3,115,000$77.9M3.53%+2.6M
6
CRSPCRISPR THERAPEUTICS AG
1,389,276$72.9M3.31%
7
MBXMBX BIOSCIENCES INC
2,123,604$67.0M3.04%
8
IMNMIMMUNOME INC
2,855,590$61.3M2.78%-1,223,825
9
ORICORIC PHARMACEUTICALS INC
6,728,116$55.0M2.50%
10
GLPGGALAPAGOS NV
1,667,119$54.5M2.47%
11
XNCRXENCOR INC
3,318,612$50.8M2.31%NEWCall
12
CGONCG ONCOLOGY INC
1,064,800$44.2M2.01%NEWCall
13
BBOTBRIDGEBIO ONCOLOGY THERAPEUT
2,823,126$35.3M1.60%
14
ETONETON PHARMACEUTICALS INC
2,030,544$34.3M1.56%
15
ZBIOZENAS BIOPHARMA INC
789,500$28.7M1.30%NEW
16
NGNENEUROGENE INC
1,271,342$26.2M1.19%
17
GPCRSTRUCTURE THERAPEUTICS INC
334,380$23.3M1.06%NEW
18
PCVXVAXCYTE INC
450,000$20.8M0.94%NEW
19
AQSTAQUESTIVE THERAPEUTICS INC
2,625,000$17.0M0.77%
20
VYGRVOYAGER THERAPEUTICS INC
4,002,847$15.7M0.71%+3.3M
21
ATRAATARA BIOTHERAPEUTICS INC
573,183$10.4M0.47%
22
MNKDMANNKIND CORP
1,660,000$9.4M0.43%NEW
23
NUVB/WSNUVATION BIO INC
963,333$8.6M0.39%
24
EOLSEVOLUS INC
675,000$4.5M0.20%NEW
25
IBIOIBIO INC
2,228,000$4.3M0.20%NEW

Quarterly Changes

New Positions

Closed Positions

Increased Positions

No increased positions

Decreased Positions

NameSharesChange
IMNM2.9M-1223825
SRZNW4K-62221
CNTA3.1M2.6M
VYGR4.0M3.3M

Sector Breakdown

Healthcare0.0% ($6.048103820262901e+122T)
Unknown0.0% ($8.6M)

Filing History

QuarterFiling DatePortfolio ValueHoldings
Q4 2025Feb 17, 2026$2.2B30
Q3 2025Nov 14, 2025$2.1T30
Q2 2025Aug 14, 2025$1.7T37
Q1 2025May 15, 2025$1.7T46
Q4 2024Feb 14, 2025$2.6T59
Q3 2024Nov 14, 2024$2921.6T64
Q2 2024Aug 14, 2024$3268.9T55
Q1 2024May 15, 2024$3953.7T59
Q4 2023Feb 14, 2024$3851.5T51
Q3 2023Nov 14, 2023$2964.7T51
Q2 2023Aug 14, 2023$4081.5T53
Q1 2023May 15, 2023$3105.4T58
Q4 2022Feb 14, 2023$3285.6T66
Q3 2022Nov 14, 2022$3.4T76
Q2 2022Aug 15, 2022$2.9T80
Q1 2022May 16, 2022$3.2T87
Q4 2021Feb 14, 2022$3.1T76
Q3 2021Nov 15, 2021$2.9T71
Q2 2021Aug 16, 2021$2.7T72
Q1 2021May 17, 2021$2.3T71
Q4 2020Feb 16, 2021$1.9T67
Q3 2020Nov 16, 2020$1.4T50
Q2 2020Aug 14, 2020$1.4T49
Q1 2020May 15, 2020$957.2B51
Q4 2019Feb 14, 2020$1.1T44
Q3 2019Nov 14, 2019$791.9B41
Q2 2019Aug 14, 2019$989.6B40
Q1 2019May 15, 2019$1.1T41
Q4 2018Feb 14, 2019$999.4B54
Q3 2018Nov 14, 2018$1.1T51
Q2 2018Aug 14, 2018$1.1T35
Q1 2018May 15, 2018$997.0B32
Q4 2017Feb 14, 2018$888.1B31
Q3 2017Nov 14, 2017$750.3B40
Q2 2017Aug 14, 2017$563.2B36
Q1 2017May 15, 2017$395.6B33
Q4 2016Feb 14, 2017$299.2B30
Q3 2016Nov 14, 2016$325.9B31
Q2 2016Aug 15, 2016$253.6B32
Q1 2016May 16, 2016$286.2B37

Fund Information

CIK0001587114
Most Recent FilingFeb 17, 2026
Number of Filings40

EcoR1 Capital, LLC is an institutional investment manager that files 13F reports with the SEC. As of the Q4 2025 filing, the fund reported a portfolio valued at $2.2B across 28 holdings. The largest position is ZYMEWORKS INC (ZYME), representing 27.4% of the portfolio. Compared to the previous quarter, the fund opened 10 new positions and closed 12 positions. 13F filings are required quarterly disclosures that provide transparency into the holdings of institutional investment managers with at least $100 million in qualifying assets.