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Siren, L.L.C.

Q4 2025 Holdings

Filed 2026-02-13 | 115 holdings | $3.4B | 13F-HR | View on SEC ↗ · Holdings Table ↗

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IssuerClassCUSIPValue ↓Shares% Portfolio
Scholar Rock Holding Corp(SRRK)COM80706P103$476.8M10,825,01314.2%
Kymera Therapeutics Inc(KYMR)COM501575104$255.7M3,286,8307.6%
BeOne Medicines AG(ONC)SPONSORED ADS07725L102$151.9M500,0004.5%
Edgewise Therapeutics Inc(EWTX)COM28036F105$112.4M4,529,9903.4%
Revolution Medicines Inc(RVMD)COM76155X100$106.3M1,335,0753.2%
Centessa Pharmaceuticals PLC(CNTA)SPONSORED ADS152309100$100.7M4,027,5173.0%
Arrowhead Pharmaceuticals Inc(ARWR)COM04280A100$99.6M1,500,4763.0%
Bicara Therapeutics Inc(BCAX)COM055477103$87.8M5,216,9692.6%
Olema Pharmaceuticals Inc(OLMA)COM68062P106$82.5M3,300,7002.5%
Disc Medicine Inc(IRON)COM254604101$78.5M988,4012.3%
Structure Therapeutics Inc(GPCR)SPONSORED ADS86366E106$75.0M1,078,6982.2%
Tango Therapeutics Inc(TNGX)COM87583X109$72.3M8,165,3742.2%
Arcus Biosciences Inc(RCUS)COM03969F109$71.7M3,007,0772.1%
Stoke Therapeutics Inc(STOK)COM86150R107$71.3M2,247,3472.1%
Crinetics Pharmaceuticals Inc(CRNX)COM22663K107$70.2M1,507,6362.1%
Dyne Therapeutics Inc(DYN)COM26818M108$68.5M3,502,9412.0%
Apellis Pharmaceuticals Inc(APLS)COM03753U106$64.8M2,578,3961.9%
Cogent Biosciences Inc(COGT)COM19240Q201$57.9M1,629,2791.7%
Septerna Inc(SEPN)COM81734D104$55.8M2,000,0001.7%
Taysha Gene Therapies Inc(TSHA)COM SHS877619106$55.7M10,129,9131.7%
Rhythm Pharmaceuticals Inc(RYTM)COM76243J105$53.5M499,9751.6%
Ascendis Pharma A/S(ASND)SPONSORED ADR04351P101$50.3M235,8621.5%
Rapt Therapeutics Inc(RAPT)COM NEW75382E208$46.6M1,375,0001.4%
Taboola.com Ltd(TBLA)ORD SHSM8744T106$46.0M9,969,4951.4%
Lexicon Pharmaceuticals Inc(LXRX)COM NEW528872302$44.8M38,918,9031.3%
Zymeworks Inc(ZYME)COM98985Y108$44.2M1,680,1211.3%
Solid Biosciences Inc(SLDB)COM NEW83422E204$43.4M7,690,4051.3%
Wave Life Sciences Ltd(WVE)SHSY95308105$41.7M2,450,0001.2%
Xenon Pharmaceuticals Inc(XENE)COM98420N105$36.4M812,7611.1%
Dbv Technologies SA(DBVT)SPONSORED ADS23306J309$35.6M1,857,3621.1%
Erasca Inc(ERAS)COM29479A108$32.6M8,757,2491.0%
enGene Holdings Inc(ENGN)COM29286M105$30.1M3,336,2640.9%
Trevi Therapeutics Inc(TRVI)COM89532M101$28.6M2,286,8670.9%
Spyre Therapeutics Inc(SYRE)COM NEW00773J202$26.8M818,5980.8%
Mineralys Therapeutics Inc(MLYS)COM603170101$25.4M699,9990.8%
Denali Therapeutics Inc(DNLI)COM24823R105$23.1M1,396,5130.7%
Remitly Global Inc(RELY)COM75960P104$22.3M1,618,2710.7%
Fulcrum Therapeutics Inc(FULC)COM359616109$22.1M1,950,0000.7%
Rapport Therapeutics Inc(RAPP)COM75383L102$21.5M708,4690.6%
Silence Therapeutics PLC(SLN)ADS82686Q101$17.7M2,911,4380.5%
IHS Holding Limited(IHS)ORD SHSG4701H109$17.6M2,357,5200.5%
Gossamer Bio Inc(GOSS)COM38341P102$16.1M5,208,9680.5%
Upstream Bio Inc(UPB)COM91678A107$16.0M588,4500.5%
Bicycle Therapeutics PLC(BCYC)SPONSORED ADS088786108$14.3M2,012,7520.4%
Monopar Therapeutics Inc(MNPR)COM NEW61023L207$13.9M212,2980.4%
Cullinan Therapeutics Inc(CGEM)COM230031106$12.4M1,193,4100.4%
Sionna Therapeutics Inc(SION)COM829401108$12.3M300,0000.4%
Inhibikase Therapeutics Inc(IKT)COM NEW45719W205$12.0M5,850,0000.4%
NovaBridge Biosciences(NBP)SPONSORED ADS44975P103$11.9M3,000,0000.4%
Amazon.com Inc(AMZN)COM023135106$11.9M51,5000.4%
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