{
  "page": "compare",
  "query": {
    "a": "IBRN",
    "b": "BBC"
  },
  "retrieved_at": "2026-07-07T15:43:12+00:00",
  "disclaimer": "Informational only — not investment advice. FundWatcher presents publicly available data and makes no recommendation to buy or sell any security. Verify all figures against the source filing before relying on them.",
  "attribution": "Data sourced from U.S. SEC EDGAR filings (Forms N-PORT, N-CEN, and prospectus Risk/Return summaries). FundWatcher is not affiliated with the SEC.",
  "terms": {
    "notice": "Use of this data is subject to the FundWatcher Terms of Service. Information may be used only for personal, non-commercial research and may not be redistributed.",
    "url": "https://fundwatcher.app/terms/"
  },
  "fund_a": {
    "name": "iShares Neuroscience and Healthcare ETF",
    "ticker": "IBRN",
    "slug": "IBRN",
    "series_id": "S000076483",
    "html_url": "https://fundwatcher.app/funds/IBRN/"
  },
  "fund_b": {
    "name": "Virtus LifeSci Biotech Clinical Trials ETF",
    "ticker": "BBC",
    "slug": "BBC",
    "series_id": "S000047353",
    "html_url": "https://fundwatcher.app/funds/BBC/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1195547817039479409597253670",
    "coverage_b_by_a": "0.1195547817039479409597253670",
    "shared_count": 15,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-04-30"
    },
    "a_top": [
      {
        "name": "BlackRock Cash Funds: Institutional, SL Agency Shares",
        "value": "650402.75",
        "weight": "0.11737289",
        "shared": false
      },
      {
        "name": "PRAXIS PRECISION MEDICINES INC",
        "value": "245548.00",
        "weight": "0.04431205",
        "shared": true
      },
      {
        "name": "AXSOME THERAPEUTICS INC",
        "value": "239340.75",
        "weight": "0.04319188",
        "shared": false
      },
      {
        "name": "ALKERMES PLC",
        "value": "222589.52",
        "weight": "0.04016892",
        "shared": false
      },
      {
        "name": "BIOGEN INC",
        "value": "192302.41",
        "weight": "0.03470325",
        "shared": false
      },
      {
        "name": "SCHOLAR ROCK HOLDING CORP",
        "value": "190928.04",
        "weight": "0.03445523",
        "shared": true
      },
      {
        "name": "PTC THERAPEUTICS INC",
        "value": "189580.30",
        "weight": "0.03421201",
        "shared": false
      },
      {
        "name": "DENALI THERAPEUTICS INC",
        "value": "181268.12",
        "weight": "0.03271198",
        "shared": true
      },
      {
        "name": "ARGENX SE SPONSORED ADR",
        "value": "180707.50",
        "weight": "0.03261081",
        "shared": false
      },
      {
        "name": "ACADIA PHARMACEUTICALS INC",
        "value": "177543.45",
        "weight": "0.03203982",
        "shared": false
      },
      {
        "name": "XENON PHARMACEUTICALS INC",
        "value": "176630.07",
        "weight": "0.03187499",
        "shared": true
      },
      {
        "name": "CATALYST PHARMACEUTICALS INC",
        "value": "172773.00",
        "weight": "0.03117894",
        "shared": false
      },
      {
        "name": "NEUROCRINE BIOSCIENCES INC",
        "value": "169666.82",
        "weight": "0.03061839",
        "shared": false
      },
      {
        "name": "SUPERNUS PHARMACEUTICALS INC",
        "value": "168222.88",
        "weight": "0.03035781",
        "shared": false
      },
      {
        "name": "CENTESSA PHARMACEUTICALS LTD ADR",
        "value": "151326.63",
        "weight": "0.02730869",
        "shared": true
      },
      {
        "name": "SK BIOPHARMS. CO LTD",
        "value": "146948.06",
        "weight": "0.02651852",
        "shared": false
      },
      {
        "name": "EDGEWISE THERAPEUTICS INC",
        "value": "137850.55",
        "weight": "0.02487677",
        "shared": true
      },
      {
        "name": "AVADEL PHARMACEU",
        "value": "129084.50",
        "weight": "0.02329483",
        "shared": false
      },
      {
        "name": "SAREPTA THERAPEUTICS INC",
        "value": "128874.24",
        "weight": "0.02325689",
        "shared": false
      },
      {
        "name": "DYNE THERAPEUTICS INC",
        "value": "120453.37",
        "weight": "0.02173724",
        "shared": true
      },
      {
        "name": "DIANTHUS THERAPEUTICS INC",
        "value": "120287.67",
        "weight": "0.02170734",
        "shared": true
      },
      {
        "name": "H LUNDBECK A/S",
        "value": "115013.11",
        "weight": "0.02075548",
        "shared": false
      },
      {
        "name": "AXOGEN INC",
        "value": "100542.25",
        "weight": "0.01814404",
        "shared": false
      },
      {
        "name": "BIOARCTIC AB",
        "value": "89203.82",
        "weight": "0.01609789",
        "shared": false
      },
      {
        "name": "BIOHAVEN LTD",
        "value": "82064.71",
        "weight": "0.01480955",
        "shared": false
      },
      {
        "name": "NEUREN PHARMACEU",
        "value": "80474.31",
        "weight": "0.01452254",
        "shared": false
      },
      {
        "name": "TAYSHA GENE THERAPIES INC",
        "value": "64610.26",
        "weight": "0.01165969",
        "shared": true
      },
      {
        "name": "TOBII DYNAVOX AB",
        "value": "60762.92",
        "weight": "0.01096539",
        "shared": false
      },
      {
        "name": "CAPRICOR THERAPEUTICS INC",
        "value": "56454.31",
        "weight": "0.01018785",
        "shared": true
      },
      {
        "name": "IDORSIA LTD",
        "value": "50594.14",
        "weight": "0.00913031",
        "shared": false
      },
      {
        "name": "ANNEXON INC",
        "value": "49214.88",
        "weight": "0.00888141",
        "shared": true
      },
      {
        "name": "RAPPORT THERAPEUTICS INC",
        "value": "48004.44",
        "weight": "0.00866297",
        "shared": true
      },
      {
        "name": "INTEGRA LIFESCIENCES HLDS CORP",
        "value": "47088.78",
        "weight": "0.00849773",
        "shared": false
      },
      {
        "name": "SANBIO CO LTD",
        "value": "44245.92",
        "weight": "0.00798470",
        "shared": false
      },
      {
        "name": "ZYLOX-TONBRIDGE MEDICAL TECHNOLOGY CO LTD",
        "value": "39505.05",
        "weight": "0.00712916",
        "shared": false
      },
      {
        "name": "Bright Minds Biosciences Inc COM NEW",
        "value": "38875.00",
        "weight": "0.00701546",
        "shared": false
      },
      {
        "name": "MEDINCELL SA",
        "value": "35240.49",
        "weight": "0.00635956",
        "shared": false
      },
      {
        "name": "FULCRUM THERAPEUTICS INC",
        "value": "33048.40",
        "weight": "0.00596398",
        "shared": true
      },
      {
        "name": "REGENXBIO INC",
        "value": "33033.60",
        "weight": "0.00596131",
        "shared": true
      },
      {
        "name": "MICROPORT NEUROTECH LTD",
        "value": "30114.54",
        "weight": "0.00543453",
        "shared": false
      },
      {
        "name": "CERIBELL INC",
        "value": "29224.98",
        "weight": "0.00527399",
        "shared": false
      },
      {
        "name": "ANAVEX LIFE SCIENCES CORP",
        "value": "27184.80",
        "weight": "0.00490582",
        "shared": false
      },
      {
        "name": "VANDA PHARMACEUTICALS INC",
        "value": "26518.18",
        "weight": "0.00478552",
        "shared": false
      },
      {
        "name": "BENITEC BIOPHARMA INC",
        "value": "25529.28",
        "weight": "0.00460706",
        "shared": false
      },
      {
        "name": "NEUROPACE INC",
        "value": "24722.42",
        "weight": "0.00446145",
        "shared": false
      },
      {
        "name": "PEIJIA MEDICAL LTD",
        "value": "24549.48",
        "weight": "0.00443024",
        "shared": false
      },
      {
        "name": "PROTHENA CORP PLC COMMON STOCK USD.01",
        "value": "24527.04",
        "weight": "0.00442620",
        "shared": false
      },
      {
        "name": "SOLID BIOSCIENCES INC",
        "value": "24011.82",
        "weight": "0.00433322",
        "shared": false
      },
      {
        "name": "ONCOLYS BIOPHARMA INC",
        "value": "20278.93",
        "weight": "0.00365957",
        "shared": false
      },
      {
        "name": "CLEARPOINT NEURO INC",
        "value": "20041.50",
        "weight": "0.00361673",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "DREYFUS GOVT CASH MGMT FUND",
        "value": "852187.85",
        "weight": "0.02233572",
        "shared": false
      },
      {
        "name": "ERASCA INC",
        "value": "816514.20",
        "weight": "0.02140072",
        "shared": false
      },
      {
        "name": "ENLIVEN THERAPEUTICS INC",
        "value": "674935.10",
        "weight": "0.01768995",
        "shared": false
      },
      {
        "name": "TANGO THERAPEUTICS INC",
        "value": "638179.16",
        "weight": "0.01672658",
        "shared": false
      },
      {
        "name": "ORUKA THERAPEUTICS INC",
        "value": "625472.63",
        "weight": "0.01639355",
        "shared": false
      },
      {
        "name": "SPYRE THERAPEUTICS INC",
        "value": "611085.60",
        "weight": "0.01601646",
        "shared": false
      },
      {
        "name": "ALUMIS INC",
        "value": "593053.80",
        "weight": "0.01554385",
        "shared": false
      },
      {
        "name": "DIANTHUS THERAPEUTICS INC",
        "value": "575177.80",
        "weight": "0.01507533",
        "shared": true
      },
      {
        "name": "KODIAK SCIENCES INC",
        "value": "503976.68",
        "weight": "0.01320916",
        "shared": false
      },
      {
        "name": "REVOLUTION MEDICINES INC",
        "value": "503843.52",
        "weight": "0.01320566",
        "shared": false
      },
      {
        "name": "CORVUS PHARMACEUTICALS INC",
        "value": "500905.44",
        "weight": "0.01312866",
        "shared": false
      },
      {
        "name": "REZOLUTE INC",
        "value": "490681.60",
        "weight": "0.01286069",
        "shared": false
      },
      {
        "name": "DEFINIUM THERAPEUTICS INC",
        "value": "481206.84",
        "weight": "0.01261236",
        "shared": false
      },
      {
        "name": "CG ONCOLOGY INC",
        "value": "449894.34",
        "weight": "0.01179166",
        "shared": false
      },
      {
        "name": "JADE BIOSCIENCES INC",
        "value": "449570.00",
        "weight": "0.01178316",
        "shared": false
      },
      {
        "name": "INHIBRX BIOSCIENCES INC",
        "value": "447971.07",
        "weight": "0.01174126",
        "shared": false
      },
      {
        "name": "RELAY THERAPEUTICS INC",
        "value": "445448.16",
        "weight": "0.01167513",
        "shared": false
      },
      {
        "name": "GH RESEARCH PLC",
        "value": "434722.75",
        "weight": "0.01139402",
        "shared": false
      },
      {
        "name": "NEKTAR THERAPEUTICS",
        "value": "429026.80",
        "weight": "0.01124473",
        "shared": false
      },
      {
        "name": "TYRA BIOSCIENCES INC",
        "value": "423811.00",
        "weight": "0.01110802",
        "shared": false
      },
      {
        "name": "VIR BIOTECHNOLOGY INC",
        "value": "421430.04",
        "weight": "0.01104562",
        "shared": false
      },
      {
        "name": "INTELLIA THERAPEUTICS INC",
        "value": "412474.52",
        "weight": "0.01081090",
        "shared": false
      },
      {
        "name": "CENTESSA PHARMACEUTICALS LTD ADR",
        "value": "410401.62",
        "weight": "0.01075657",
        "shared": true
      },
      {
        "name": "ANAPTYSBIO INC",
        "value": "403516.47",
        "weight": "0.01057611",
        "shared": false
      },
      {
        "name": "OMEROS CORP",
        "value": "397003.20",
        "weight": "0.01040540",
        "shared": false
      },
      {
        "name": "TECTONIC THERAPEUTIC INC",
        "value": "390629.02",
        "weight": "0.01023833",
        "shared": false
      },
      {
        "name": "ALLOGENE THERAPEUTICS INC",
        "value": "389338.44",
        "weight": "0.01020450",
        "shared": false
      },
      {
        "name": "COMPASS Pathways PLC, ADR",
        "value": "371007.00",
        "weight": "0.00972404",
        "shared": false
      },
      {
        "name": "EDGEWISE THERAPEUTICS INC",
        "value": "361767.60",
        "weight": "0.00948188",
        "shared": true
      },
      {
        "name": "PALVELLA THERAPEUTICS INC",
        "value": "359039.36",
        "weight": "0.00941037",
        "shared": false
      },
      {
        "name": "CAPRICOR THERAPEUTICS INC",
        "value": "356149.48",
        "weight": "0.00933463",
        "shared": true
      },
      {
        "name": "VAXCYTE INC",
        "value": "354945.24",
        "weight": "0.00930306",
        "shared": false
      },
      {
        "name": "PHARVARIS NV",
        "value": "354258.24",
        "weight": "0.00928506",
        "shared": false
      },
      {
        "name": "ARRIVENT BIOPHARMA INC",
        "value": "351317.00",
        "weight": "0.00920797",
        "shared": false
      },
      {
        "name": "XENON PHARMACEUTICALS INC",
        "value": "351034.56",
        "weight": "0.00920056",
        "shared": true
      },
      {
        "name": "NEUROGENE INC",
        "value": "344205.37",
        "weight": "0.00902157",
        "shared": true
      },
      {
        "name": "SUMMIT THERAPEUTICS INC",
        "value": "337093.68",
        "weight": "0.00883518",
        "shared": false
      },
      {
        "name": "AMYLYX PHARMACEUTICALS INC",
        "value": "337088.00",
        "weight": "0.00883503",
        "shared": false
      },
      {
        "name": "CELLDEX THERAPEUTICS INC",
        "value": "329852.16",
        "weight": "0.00864538",
        "shared": false
      },
      {
        "name": "PRAXIS PRECISION MEDICINES INC",
        "value": "327119.58",
        "weight": "0.00857376",
        "shared": true
      },
      {
        "name": "ARCUS BIOSCIENCES INC",
        "value": "326884.50",
        "weight": "0.00856759",
        "shared": false
      },
      {
        "name": "ANNEXON INC",
        "value": "325990.45",
        "weight": "0.00854416",
        "shared": true
      },
      {
        "name": "TERNS PHARMACEUTICALS INC",
        "value": "324566.76",
        "weight": "0.00850685",
        "shared": false
      },
      {
        "name": "LIQUIDIA TECHNOLOGIES INC",
        "value": "324188.28",
        "weight": "0.00849693",
        "shared": false
      },
      {
        "name": "MONTE ROSA THERAPEUTICS INC",
        "value": "324056.30",
        "weight": "0.00849347",
        "shared": false
      },
      {
        "name": "IMMUNOME INC",
        "value": "323499.88",
        "weight": "0.00847888",
        "shared": false
      },
      {
        "name": "BICARA THERAPEUTICS INC",
        "value": "322275.72",
        "weight": "0.00844680",
        "shared": false
      },
      {
        "name": "CELCUITY INC",
        "value": "318058.35",
        "weight": "0.00833626",
        "shared": false
      },
      {
        "name": "IRONWOOD PHARMA CL A (PEND)",
        "value": "318025.13",
        "weight": "0.00833539",
        "shared": false
      },
      {
        "name": "AbCellera Biologics Inc COM",
        "value": "316416.75",
        "weight": "0.00829324",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001004726-26-001911",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000100472626001911/0001004726-26-001911-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000940400-26-024966",
      "as_of": "2026-04-30",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1559109/000094040026024966/0000940400-26-024966-index.htm"
    }
  ]
}