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Siren, L.L.C.

Q1 2026 Holdings

Filed 2026-05-14 | 102 holdings | $3.6B | 13F-HR | View on SEC ↗ · Holdings Table ↗

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IssuerClassCUSIPValue ↓Shares% Portfolio
Scholar Rock Holding Corp(SRRK)COM80706P103$532.2M10,825,01314.8%
Kymera Therapeutics Inc(KYMR)COM501575104$265.4M3,186,8307.4%
Erasca Inc(ERAS)COM29479A108$181.9M11,244,2465.0%
Edgewise Therapeutics Inc(EWTX)COM28036F105$139.6M4,430,2633.9%
BeOne Medicines AG(ONC)SPONSORED ADS07725L102$138.1M465,0003.8%
Tango Therapeutics Inc(TNGX)COM87583X109$118.3M5,657,1053.3%
Bicara Therapeutics Inc(BCAX)COM055477103$115.4M5,802,9703.2%
Revolution Medicines Inc(RVMD)COM76155X100$108.0M1,110,9803.0%
Arrowhead Pharmaceuticals Inc(ARWR)COM04280A100$101.3M1,615,4762.8%
Veradermics Inc(MANE)COMMON STOCK922967104$95.1M1,505,3742.6%
Xenon Pharmaceuticals Inc(XENE)COM98420N105$76.7M1,318,5642.1%
Olema Pharmaceuticals Inc(OLMA)COM68062P106$70.9M4,756,9492.0%
Crinetics Pharmaceuticals Inc(CRNX)COM22663K107$69.1M1,903,6361.9%
Lexicon Pharmaceuticals Inc(LXRX)COM NEW528872302$69.1M44,303,5181.9%
Cogent Biosciences Inc(COGT)COM19240Q201$65.8M1,709,2791.8%
Stoke Therapeutics Inc(STOK)COM86150R107$65.0M1,995,3471.8%
Arcus Biosciences Inc(RCUS)COM03969F109$65.0M3,007,0771.8%
Structure Therapeutics Inc(GPCR)SPONSORED ADS86366E106$64.0M1,328,6981.8%
Disc Medicine Inc(IRON)COM254604101$63.2M988,4011.8%
Rhythm Pharmaceuticals Inc(RYTM)COM76243J105$63.1M725,5111.7%
Solid Biosciences Inc(SLDB)COM NEW83422E204$55.4M7,690,4051.5%
Septerna Inc(SEPN)COM81734D104$48.1M2,000,0001.3%
Centessa Pharmaceuticals PLC(CNTA)SPONSORED ADS152309100$41.8M1,053,4641.2%
Spyre Therapeutics Inc(SYRE)COM NEW00773J202$41.3M818,5981.1%
Cytokinetics Inc(CYTK)COM NEW23282W605$40.5M613,9521.1%
Dyne Therapeutics, Inc(DYN)COM26818M108$40.4M2,229,1251.1%
Taysha Gene Therapies Inc(TSHA)COM SHS877619106$39.5M8,829,9131.1%
Dbv Technologies SA(DBVT)SPONSORED ADS23306J309$38.8M1,857,3621.1%
Oric Pharmaceuticals Inc(ORIC)COM68622P109$38.0M2,998,1921.1%
enGene Holdings Inc(ENGN)COM29286M105$35.8M5,253,1591.0%
Palvella Therapeutics Inc(PVLA)COM697947109$32.1M257,4850.9%
Taboola.com Ltd(TBLA)ORD SHSM8744T106$30.9M9,969,4950.9%
Enliven Therapeutics Inc(ELVN)COM29337E102$29.3M746,2260.8%
Denali Therapeutics Inc(DNLI)COM24823R105$26.8M1,396,5130.7%
Remitly Global Inc(RELY)COM75960P104$24.2M1,543,2710.7%
Damora Therapeutics Inc(GLTO)COM NEW36322Q206$23.3M900,0000.6%
Zura Bio Ltd(ZURA)CLASS A ORD SHSG9TY5A101$22.2M3,734,8660.6%
Annexon Inc(ANNX)COM03589W102$21.9M3,958,6460.6%
Trevi Therapeutics Inc(TRVI)COM89532M101$21.3M1,786,8670.6%
Rapport Therapeutics Inc(RAPP)COM75383L102$20.1M641,4690.6%
Alphabet Inc(GOOGL)CAP STK CL A02079K305$18.9M65,7030.5%
Fulcrum Therapeutics Inc(FULC)COM359616109$18.0M2,350,0000.5%
Wave Life Sciences Ltd(WVE)SHSY95308105$17.8M2,450,0000.5%
Definium Therapeutics Inc(DFTX)COM SHS24477V105$17.4M919,4930.5%
Amylyx Pharmaceuticals Inc(AMLX)COM03237H101$17.1M1,230,0000.5%
Cullinan Therapeutics Inc(CGEM)COM230031106$17.0M1,193,4100.5%
Neumora Therapeutics Inc(NMRA)COM640979100$16.6M8,497,8220.5%
Uniqure NV(QURE)SHSN90064101$16.4M1,000,0000.5%
CytomX Therapeutics Inc(CTMX)COM23284F105$16.3M3,457,7110.5%
Nvidia Corp(NVDA)COM67066G104$15.5M89,0850.4%
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