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Siren, L.L.C.

Q3 2025 Holdings

Filed 2025-11-13 | 117 holdings | $2.6B | 13F-HR | View on SEC ↗ · Holdings Table ↗

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IssuerClassCUSIPValue ↓Shares% Portfolio
Scholar Rock Holding Corp(SRRK)COM80706P103$344.5M9,250,00513.5%
Kymera Therapeutics Inc(KYMR)COM501575104$194.0M3,428,1507.6%
BeOne Medicines AG(ONC)SPONSORED ADS07725L102$168.0M492,9906.6%
Arrowhead Pharmaceuticals Inc(ARWR)COM04280A100$92.1M2,669,8803.6%
Bicara Therapeutics Inc(BCAX)COM055477103$82.4M5,216,9693.2%
Centessa Pharmaceuticals PLC(CNTA)SPONSORED ADS152309100$78.3M3,227,5173.1%
Crinetics Pharmaceuticals Inc(CRNX)COM22663K107$70.3M1,688,6112.8%
Edgewise Therapeutics Inc(EWTX)COM28036F105$63.2M3,897,0992.5%
Disc Medicine Inc(IRON)COM254604101$60.4M913,4012.4%
Dyne Therapeutics Inc(DYN)COM26818M108$59.8M4,729,1742.3%
Apellis Pharmaceuticals Inc(APLS)COM03753U106$58.3M2,578,3962.3%
Avidity Biosciences Inc(RNA)COM05370A108$56.0M1,285,6102.2%
Stoke Therapeutics Inc(STOK)COM86150R107$52.8M2,247,3472.1%
Lexicon Pharmaceuticals Inc(LXRX)COM NEW528872302$52.5M38,918,9032.1%
Rhythm Pharmaceuticals Inc(RYTM)COM76243J105$50.5M499,9752.0%
Tango Therapeutics Inc(TNGX)COM87583X109$49.4M5,883,1881.9%
Revolution Medicines Inc(RVMD)COM76155X100$48.7M1,043,7201.9%
Ascendis Pharma A/S(ASND)SPONSORED ADR04351P101$46.9M235,8621.8%
Rezolute Inc(RZLT)COM NEW76200L309$45.8M4,870,0001.8%
Solid Biosciences Inc(SLDB)COM NEW83422E204$45.8M7,415,9051.8%
Septerna Inc(SEPN)COM81734D104$41.4M2,202,5141.6%
Arcus Biosciences Inc(RCUS)COM03969F109$39.6M2,912,0771.5%
Taysha Gene Therapies Inc(TSHA)COM SHS877619106$36.0M11,014,7371.4%
Taboola.com Ltd(TBLA)ORD SHSM8744T106$34.0M9,969,4951.3%
Xenon Pharmaceuticals Inc(XENE)COM98420N105$32.6M812,7611.3%
Soleno Therapeutics Inc(SLNO)COM834203309$31.6M467,3421.2%
Rapport Therapeutics Inc(RAPP)COM75383L102$31.3M1,053,4691.2%
Structure Therapeutics Inc(GPCR)SPONSORED ADS86366E106$28.8M1,026,8111.1%
Wave Life Sciences Ltd(WVE)SHSY95308105$27.1M3,696,3221.1%
Remitly Global Inc(RELY)COM75960P104$26.4M1,618,2711.0%
Cogent Biosciences Inc(COGT)COM19240Q201$24.8M1,724,2791.0%
Trevi Therapeutics Inc(TRVI)COM89532M101$23.2M2,536,8670.9%
NewAmsterdam Pharma Company NV(NAMS)ORDINARY SHARESN62509109$21.8M765,7050.9%
Korro Bio Inc(KRRO)COM500946108$20.1M418,8330.8%
Erasca Inc(ERAS)COM29479A108$19.1M8,757,2490.7%
IHS Holding Limited(IHS)ORD SHSG4701H109$16.1M2,357,5200.6%
Uniqure NV(QURE)SHSN90064101$16.1M275,2000.6%
Bicycle Therapeutics PLC(BCYC)SPONSORED ADS088786108$15.6M2,012,7520.6%
Silence Therapeutics PLC(SLN)ADS82686Q101$15.1M2,911,4380.6%
Rapt Therapeutics Inc(RAPT)COM NEW75382E208$15.0M580,4660.6%
Upstream Bio Inc(UPB)COM91678A107$14.8M788,4500.6%
Gossamer Bio Inc(GOSS)COM38341P102$13.7M5,208,9680.5%
Arrivent Biopharma Inc(AVBP)COM04272N102$12.9M700,0000.5%
Amazon.com Inc(AMZN)COM023135106$12.8M58,5000.5%
Oric Pharmaceuticals Inc(ORIC)COM68622P109$12.1M1,007,5750.5%
Denali Therapeutics Inc(DNLI)COM24823R105$11.9M821,5130.5%
Ionq Inc(IONQ)COM46222L108$10.5M170,0000.4%
Sionna Therapeutics Inc(SION)COM829401108$9.6M325,0000.4%
CrowdStrike Holdings Inc(CRWD)CL A22788C105$9.1M18,5000.4%
Microsoft Corp(MSFT)COM594918104$8.9M17,1500.3%
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