{
  "page": "compare",
  "query": {
    "a": "FBTIX",
    "b": "IBB"
  },
  "retrieved_at": "2026-07-07T17:27:32+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": "Fidelity Advisor Biotechnology Fund",
    "ticker": "FBTIX",
    "slug": "FBTIX",
    "series_id": "S000005321",
    "html_url": "https://fundwatcher.app/funds/FBTIX/"
  },
  "fund_b": {
    "name": "iShares Biotechnology ETF",
    "ticker": "IBB",
    "slug": "IBB",
    "series_id": "S000004350",
    "html_url": "https://fundwatcher.app/funds/IBB/"
  },
  "overlap": {
    "coverage_a_by_b": "0.3422533752517120364475233675",
    "coverage_b_by_a": "0.3422533752517120364475233675",
    "shared_count": 50,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-03-31"
    },
    "a_top": [
      {
        "name": "ABBVIE INC",
        "value": "309890235.80",
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      },
      {
        "name": "GILEAD SCIENCES INC",
        "value": "122658995.00",
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      },
      {
        "name": "ALNYLAM PHARMACEUTICALS INC",
        "value": "93705499.16",
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      },
      {
        "name": "Ascendis Pharma A/S",
        "value": "83798312.50",
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      },
      {
        "name": "COGENT BIOSCIENCES INC",
        "value": "71404090.38",
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      },
      {
        "name": "ARGENX SE SPONSORED ADR",
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      },
      {
        "name": "Fidelity Securities Lending Cash Central Fund",
        "value": "66944838.29",
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      },
      {
        "name": "INSMED INC",
        "value": "64677501.00",
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      },
      {
        "name": "VIRIDIAN THERAPEUTICS INC",
        "value": "58821312.00",
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      },
      {
        "name": "BIOGEN INC",
        "value": "52905649.00",
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      },
      {
        "name": "AMGEN INC",
        "value": "51522341.64",
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      },
      {
        "name": "VAXCYTE INC",
        "value": "42659344.53",
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      },
      {
        "name": "STRUCTURE THERAPEUTICS INC ADR",
        "value": "42562140.00",
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      },
      {
        "name": "NUVALENT INC-A",
        "value": "42417842.96",
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      },
      {
        "name": "DIANTHUS THERAPEUTICS INC",
        "value": "38978010.18",
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      {
        "name": "AMYLYX PHARMACEUTICALS INC",
        "value": "34770428.00",
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      {
        "name": "MODERNA INC",
        "value": "29716401.00",
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      },
      {
        "name": "APOGEE THERAPEUTICS INC",
        "value": "29652380.89",
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      },
      {
        "name": "XENON PHARMACEUTICALS INC",
        "value": "29148185.58",
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      },
      {
        "name": "CRINETICS PHARMACEUTICALS INC",
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      {
        "name": "PRAXIS PRECISION MEDICINES INC",
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      },
      {
        "name": "SCHOLAR ROCK HOLDING CORP",
        "value": "25822197.12",
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      },
      {
        "name": "ORUKA THERAPEUTICS INC",
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      {
        "name": "SPYRE THERAPEUTICS INC",
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      {
        "name": "UCB SA",
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        "name": "UNIQURE N.V.",
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      {
        "name": "UPSTREAM BIO INC",
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      },
      {
        "name": "ROIVANT SCIENCES LTD",
        "value": "21105444.00",
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      },
      {
        "name": "NATERA INC",
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      {
        "name": "OLEMA PHARMACEUTICALS INC",
        "value": "20133616.00",
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      {
        "name": "VIKING THERAPEUTICS INC",
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      {
        "name": "NEWAMSTERDAM PHARMA COMPANY NV",
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      {
        "name": "CYTOKINETICS INC",
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        "name": "KYMERA THERAPEUTICS INC",
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        "name": "JADE BIOSCIENCES INC",
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      {
        "name": "CG ONCOLOGY INC",
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        "name": "ENLIVEN THERAPEUTICS INC",
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      {
        "name": "ZENAS BIOPHARMA INC",
        "value": "11560534.92",
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      {
        "name": "DISC MEDICINE INC",
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      {
        "name": "ARCELLX INC",
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      {
        "name": "STOKE THERAPEUTICS INC",
        "value": "9639018.00",
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      {
        "name": "SONOMA BIOTHERAPEUTICS INC SER B PFD PP",
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        "name": "TRAVERE THERAPEUTICS INC",
        "value": "9364308.00",
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      {
        "name": "MINERALYS THERAPEUTICS INC",
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      {
        "name": "CYTOMX THERAPEUTICS INC",
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      {
        "name": "ANAPTYSBIO INC",
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        "name": "SOLENO THERAPEUTICS INC",
        "value": "6979360.00",
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      {
        "name": "CELLDEX THERAPEUTICS INC",
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      {
        "name": "REZOLUTE INC",
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    ],
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        "name": "BlackRock Cash Funds: Institutional, SL Agency Shares",
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        "name": "GILEAD SCIENCES INC",
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      {
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      {
        "name": "VERTEX PHARMACEUTICALS INC",
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        "name": "REGENERON PHARMACEUTICALS INC",
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      {
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        "name": "INSMED INC",
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      {
        "name": "ARGENX SE SPONSORED ADR",
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      {
        "name": "BIOGEN INC",
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      {
        "name": "NATERA INC",
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      {
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        "value": "187090526.82",
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      {
        "name": "BEONE MEDICINES LTD ADR",
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      {
        "name": "INCYTE CORP",
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      {
        "name": "MODERNA INC",
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      {
        "name": "ILLUMINA INC",
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      {
        "name": "REVOLUTION MEDICINES INC",
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        "name": "ROIVANT SCIENCES LTD",
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      {
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        "value": "95841113.48",
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      {
        "name": "GENMAB A/S -SP ADR DEPOSITARY RECEIPT",
        "value": "95383279.34",
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      {
        "name": "BRIDGEBIO PHARMA INC",
        "value": "91984896.62",
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      {
        "name": "IONIS PHARMACEUTICALS INC",
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      {
        "name": "MEDPACE HOLDINGS INC",
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      {
        "name": "MADRIGAL PHARMACEUTICALS INC",
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        "name": "BIOMARIN PHARMACEUTICAL INC",
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      {
        "name": "CHARLES RIVER LABS INTL INC",
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        "name": "ARROWHEAD PHARMACEUTICALS INC",
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      {
        "name": "BIO-TECHNE CORP",
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      {
        "name": "CYTOKINETICS INC",
        "value": "59119424.52",
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      },
      {
        "name": "HALOZYME THERAPEUTICS INC",
        "value": "56131284.26",
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      {
        "name": "AXSOME THERAPEUTICS INC",
        "value": "53932253.76",
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      },
      {
        "name": "BIONTECH SE ADR",
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      {
        "name": "KRYSTAL BIOTECH INC",
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      {
        "name": "PROTAGONIST THERAPEUTICS INC",
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      {
        "name": "REPLIGEN CORP",
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      {
        "name": "KYMERA THERAPEUTICS INC",
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      {
        "name": "ALKERMES PLC",
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      {
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      {
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      {
        "name": "TERNS PHARMACEUTICALS INC",
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      },
      {
        "name": "NUVALENT INC-A",
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        "name": "MIRUM PHARMACEUTICALS INC",
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      {
        "name": "TEMPUS AI INC-A",
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      },
      {
        "name": "XENON PHARMACEUTICALS INC",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000035402-26-001936",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/315700/000003540226001936/0000035402-26-001936-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-012466",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000207169126012466/0002071691-26-012466-index.htm"
    }
  ]
}