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    iShares Biotechnology ETF (IBB) Holdings

    Sector Equity • Health

    $213.63
    +3.64 (+1.73%)

    Market Cap: $11.20B

    Last updated: Nov 06, 2026 at 4:29 PM ET

    IBB holds 233 stocks. The largest holding is Gilead Sciences Inc at 8.56%; the top 10 make up 50.50% of the fund in GNG's holdings data, updated Nov 5, 2026.

    IBB Top 10 Holdings

    RankNameWeightCumulative share
    1Gilead Sciences Inc8.56%8.56%
    2Amgen Inc8.20%16.76%
    3Vertex Pharmaceuticals Inc7.53%24.29%
    4Regeneron Pharmaceuticals Inc5.64%29.93%
    5Moderna Inc5.29%35.22%
    6Natera Inc3.85%39.07%
    7argenx NV ADR3.42%42.49%
    8Illumina Inc2.93%45.42%
    9Biogen Inc2.58%48.00%
    10Revolution Medicines Inc2.50%50.50%

    IBB Sector Breakdown

    Healthcare94.6%

    Note: Total allocation shown is 94.6%. Some sectors may not be classified.

    All 233 IBB Holdings

    Holdings updated Nov 5, 2026
    1GILDGilead Sciences Inc8.56%
    2AMGNAmgen Inc8.20%
    3VRTXVertex Pharmaceuticals Inc7.53%
    4REGNRegeneron Pharmaceuticals Inc5.64%
    5MRNAModerna Inc5.29%
    6NTRANatera Inc3.85%
    7ARGXargenx NV ADR3.42%
    8ILMNIllumina Inc2.93%
    9BIIBBiogen Inc2.58%
    10RVMDRevolution Medicines Inc2.50%
    11ONCBeOne Medicines AG2.15%
    12ALNYALNYLAM PHARMACEUTICALS INC2.11%
    13GMABGenmab AS1.72%
    14UTHRUnited Therapeutics Corporation1.71%
    15INCYIncyte Corporation1.63%
    16INSMInsmed Inc1.42%
    17ROIVRoivant Sciences Ltd1.33%
    18CRLCharles River Laboratories1.18%
    19EXELExelixis Inc1.09%
    20ASNDAscendis Pharma AS1.06%
    21MEDPMedpace Holdings Inc1.06%
    22NBIXNeurocrine Biosciences Inc1.02%
    23HALOHalozyme Therapeutics Inc1.01%
    24BBIOBridgeBio Pharma Inc0.85%
    25TECHBio-Techne Corp0.79%
    26BMRNBIOMARIN PHARMACEUTICAL INC0.74%
    27TWSTTwist Bioscience Corp0.71%
    28MDGLMadrigal Pharmaceuticals Inc0.66%
    29RGENRepligen Corporation0.65%
    30TXG10X Genomics Inc0.63%
    31KYMRKymera Therapeutics Inc0.61%
    32PCVXVaxcyte Inc0.61%
    33PTGXProtagonist Therapeutics Inc0.60%
    34BNTXBIONTECH SE ADR0.58%
    35KRYSKrystal Biotech Inc0.58%
    36CYTKCytokinetics Inc0.57%
    37ARWRARROWHEAD PHARMACEUTICALS INC0.55%
    38SYRESpyre Therapeutics Inc.0.55%
    39TEMTempus AI, Inc. Class A Common Stock0.54%
    40ALKSALKERMES PLC0.50%
    41IONSIonis Pharmaceuticals Inc0.50%
    42PRAXPraxis Precision Medicines Inc0.49%
    43BRKRBruker Corporation0.47%
    44ABVXAbivax SA American Depositary Shares0.44%
    45AXSMAxsome Therapeutics Inc0.44%
    46GRALGRAIL, LLC0.44%
    47RYTMRhythm Pharmaceuticals Inc0.42%
    48IOVAIovance Biotherapeutics Inc0.40%
    49ORKAOruka Therapeutics, Inc.0.39%
    50KODKodiak Sciences Inc0.37%
    51COGTCogent Biosciences Inc0.35%
    52PTCTPTC Therapeutics Inc0.34%
    53DFTXDFTX0.33%
    54CRSPCrispr Therapeutics AG0.32%
    55MIRMMirum Pharmaceuticals Inc0.32%
    56TVTXTravere Therapeutics Inc0.32%
    57ADPTAdaptive Biotechnologies Corp0.30%
    58CAICaris Life Sciences, Inc. Common Stock0.30%
    59SRRKScholar Rock Holding Corp0.29%
    60VCYTVeracyte Inc0.28%
    61CGONCG Oncology, Inc. Common stock0.26%
    62ERASErasca Inc0.26%
    63LEGNLegend Biotech Corp0.25%
    64ACADACADIA PHARMACEUTICALS INC0.24%
    65ARQTArcutis Biotherapeutics Inc0.24%
    66IBRXImmunitybio Inc0.24%
    67CDNACareDx Inc0.23%
    68EWTXEdgewise Therapeutics Inc0.23%
    69XENEXenon Pharmaceuticals Inc0.23%
    70ABCLABCELLERA BIOLOGICS INC ORDINARY SHARES0.22%
    71RLAYRELAY THERAPEUTICS INC ORDINARY SHARES0.22%
    72TNGXTango Therapeutics Inc0.22%
    73AMLXAMYLYX PHARMACEUTICALS INC0.21%
    74IDYAIdeaya Biosciences Inc0.21%
    75DNLIDenali Therapeutics Inc0.20%
    76TARSTarsus Pharmaceuticals Inc0.20%
    77DYNDyne Therapeutics Inc0.18%
    78ELVNEnliven Therapeutics Inc.0.18%
    79NRIXNurix Therapeutics Inc0.18%
    80ADMAADMA BIOLOGICS INC0.17%
    81IMVTImmunovant Inc0.17%
    82BEAMBeam Therapeutics Inc0.16%
    83FTREFortrea Holdings Inc.0.16%
    84IRONDisc Medicine Inc.0.16%
    85SMMTSummit Therapeutics PLC0.16%
    86ZLABZai Lab Ltd0.16%
    87AGIOAGIOS PHARMACEUTICALS INC0.15%
    88VCELVericel Corp Ord0.15%
    89XNCRXencor Inc0.15%
    90AUPHAurinia Pharmaceuticals Inc0.14%
    91BHVNBiohaven Ltd.0.14%
    92ZYMEZYMEWORKS INC REGISTERED SHS0.14%
    93GRFSGrifols SA ADR0.13%
    94RXRXRecursion Pharmaceuticals Inc0.13%
    95SRPTSarepta Therapeutics Inc0.13%
    96BCRXBioCryst Pharmaceuticals Inc0.12%
    97VERAVera Therapeutics Inc0.12%
    98ABSIABSCI CORP0.11%
    99MBXMBX Biosciences, Inc. Common Stock0.11%
    100NAMSNEWAMSTERDAM PHARMA CO NV0.11%
    Showing 1-100 of 233
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    Holdings questions

    What stocks are in IBB?

    IBB holds 233 stocks. The largest holdings are Gilead Sciences Inc (8.56%), Amgen Inc (8.20%) and Vertex Pharmaceuticals Inc (7.53%).

    What are IBB's top 10 holdings?

    Gilead Sciences Inc (8.56%), Amgen Inc (8.20%), Vertex Pharmaceuticals Inc (7.53%), Regeneron Pharmaceuticals Inc (5.64%), Moderna Inc (5.29%), Natera Inc (3.85%), argenx NV ADR (3.42%), Illumina Inc (2.93%), Biogen Inc (2.58%), Revolution Medicines Inc (2.50%). Together they make up 50.50% of the fund.

    How many holdings does IBB have?

    IBB has 233 holdings in GNG's holdings data.

    Which sector does IBB invest in most?

    Healthcare is the largest listed sector at 94.6%.

    When did GNG last update IBB's holdings?

    GNG last updated IBB's holdings on Nov 5, 2026.