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Siren, L.L.C.

Source: SEC Form 13F · as of Mar 2026

Siren, L.L.C. holds 44 biotech & pharma companies tracked by BioSniper, totaling $2.27B in value as of Mar 2026 (SEC Form 13F).

Companies held

44

Total value held

$2.27B

BioSniper AIPage evidence connected

Prepared research question

What matters most for Scholar Rock Holding Corp (SRRK)—catalysts, financial risk and supporting evidence?

Run cited research

Traceable citations · Unknowns marked

CompanySharesValue
SRRKScholar Rock Holding Corp10,825,013$532.2M
ONCBeOne Medicines Ltd.465,000$138.1M
TNGXTango Therapeutics, Inc.5,657,105$118.3M
BCAXBicara Therapeutics Inc.5,802,970$115.4M
RVMDREVOLUTION MEDICINES, INC.1,110,980$108.0M
ARWRARROWHEAD PHARMACEUTICALS, INC.1,615,476$101.3M
MANEVeradermics Incorporated1,505,374$95.1M
OLMAOlema Pharmaceuticals, Inc.4,756,949$70.9M
LXRXLEXICON PHARMACEUTICALS, INC.44,303,518$69.1M
COGTCogent Biosciences, Inc.1,709,279$65.8M
STOKStoke Therapeutics, Inc.1,995,347$65.0M
RCUSArcus Biosciences, Inc.3,007,077$65.0M
GPCRStructure Therapeutics Inc.1,328,698$64.0M
IRONDisc Medicine, Inc.988,401$63.2M
RYTMRHYTHM PHARMACEUTICALS, INC.725,511$63.1M
SLDBSolid Biosciences Inc.7,690,405$55.4M
CNTACentessa Pharmaceuticals plc1,053,464$41.8M
SYRESpyre Therapeutics, Inc.818,598$41.3M
CYTKCYTOKINETICS INC613,952$40.5M
ORICOric Pharmaceuticals, Inc.2,998,192$38.0M
PVLAPALVELLA THERAPEUTICS, INC.257,485$32.1M
ELVNEnliven Therapeutics, Inc.746,226$29.3M
DNLIDenali Therapeutics Inc.1,396,513$26.8M
DMRADamora Therapeutics, Inc.900,000$23.3M
ZURAZura Bio Ltd3,734,866$22.2M
ANNXAnnexon, Inc.3,958,646$21.9M
DFTXDefinium Therapeutics Inc.919,493$17.4M
CGEMCullinan Therapeutics, Inc.1,193,410$17.0M
QUREuniQure N.V.1,000,000$16.4M
CTMXCytomX Therapeutics, Inc.3,457,711$16.3M
SLNSilence Therapeutics Plc2,911,438$15.3M
SIONSionna Therapeutics, Inc.300,000$12.0M
RZLTRezolute, Inc.3,328,287$10.2M
MPLTMapLight Therapeutics, Inc.450,000$9.1M
NBPNovaBridge Biosciences3,000,000$7.4M
BCYCBICYCLE THERAPEUTICS PLC1,560,882$7.2M
WHWKWhitehawk Therapeutics, Inc.2,082,000$7.2M
TENXTENAX THERAPEUTICS, INC.427,141$6.8M
ABSIAbsci Corporation1,800,000$5.4M
IVVDInvivyd, Inc.4,000,000$5.2M
AGMBAgomAb Therapeutics NV411,250$4.3M
KRROKorro Bio, Inc.347,718$3.9M
AGENAGENUS INC1,064,250$3.6M
KLRSKalaris Therapeutics, Inc.435,798$2.5M

13F holdings reflect long positions in U.S.-listed securities as reported to the SEC. Values are point-in-time for the most recent reported quarter.