{
  "page": "compare",
  "query": {
    "a": "FBTIX",
    "b": "FBIOX"
  },
  "retrieved_at": "2026-07-07T16:19:01+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": "Select Biotechnology Portfolio",
    "ticker": "FBIOX",
    "slug": "FBIOX",
    "series_id": "S000007486",
    "html_url": "https://fundwatcher.app/funds/FBIOX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.5618140292706570351284929898",
    "coverage_b_by_a": "0.5618140292706570351284929898",
    "shared_count": 66,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "ABBVIE INC",
        "value": "309890235.80",
        "weight": "0.16044894",
        "shared": true
      },
      {
        "name": "GILEAD SCIENCES INC",
        "value": "122658995.00",
        "weight": "0.06350799",
        "shared": true
      },
      {
        "name": "ALNYLAM PHARMACEUTICALS INC",
        "value": "93705499.16",
        "weight": "0.04851701",
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      },
      {
        "name": "Ascendis Pharma A/S",
        "value": "83798312.50",
        "weight": "0.04338746",
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      },
      {
        "name": "COGENT BIOSCIENCES INC",
        "value": "71404090.38",
        "weight": "0.03697022",
        "shared": true
      },
      {
        "name": "ARGENX SE SPONSORED ADR",
        "value": "68080500.00",
        "weight": "0.03524940",
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      },
      {
        "name": "Fidelity Securities Lending Cash Central Fund",
        "value": "66944838.29",
        "weight": "0.03466140",
        "shared": true
      },
      {
        "name": "INSMED INC",
        "value": "64677501.00",
        "weight": "0.03348746",
        "shared": true
      },
      {
        "name": "VIRIDIAN THERAPEUTICS INC",
        "value": "58821312.00",
        "weight": "0.03045535",
        "shared": true
      },
      {
        "name": "BIOGEN INC",
        "value": "52905649.00",
        "weight": "0.02739246",
        "shared": true
      },
      {
        "name": "AMGEN INC",
        "value": "51522341.64",
        "weight": "0.02667624",
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      },
      {
        "name": "VAXCYTE INC",
        "value": "42659344.53",
        "weight": "0.02208733",
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      },
      {
        "name": "STRUCTURE THERAPEUTICS INC ADR",
        "value": "42562140.00",
        "weight": "0.02203700",
        "shared": true
      },
      {
        "name": "NUVALENT INC-A",
        "value": "42417842.96",
        "weight": "0.02196229",
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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",
        "weight": "0.01538598",
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      },
      {
        "name": "APOGEE THERAPEUTICS INC",
        "value": "29652380.89",
        "weight": "0.01535283",
        "shared": true
      },
      {
        "name": "XENON PHARMACEUTICALS INC",
        "value": "29148185.58",
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      },
      {
        "name": "CRINETICS PHARMACEUTICALS INC",
        "value": "27190831.80",
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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",
        "value": "24330204.78",
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      },
      {
        "name": "SPYRE THERAPEUTICS INC",
        "value": "23963957.16",
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      },
      {
        "name": "UCB SA",
        "value": "22947570.03",
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      },
      {
        "name": "UNIQURE N.V.",
        "value": "22529152.00",
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      },
      {
        "name": "UPSTREAM BIO INC",
        "value": "21476373.24",
        "weight": "0.01111962",
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      },
      {
        "name": "ROIVANT SCIENCES LTD",
        "value": "21105444.00",
        "weight": "0.01092757",
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      },
      {
        "name": "NATERA INC",
        "value": "20663916.00",
        "weight": "0.01069896",
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      },
      {
        "name": "OLEMA PHARMACEUTICALS INC",
        "value": "20133616.00",
        "weight": "0.01042439",
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      },
      {
        "name": "VIKING THERAPEUTICS INC",
        "value": "18800118.48",
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      },
      {
        "name": "NEWAMSTERDAM PHARMA COMPANY NV",
        "value": "18248768.00",
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      },
      {
        "name": "CYTOKINETICS INC",
        "value": "17887256.49",
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      },
      {
        "name": "KYMERA THERAPEUTICS INC",
        "value": "16842273.00",
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      },
      {
        "name": "JADE BIOSCIENCES INC",
        "value": "13960694.23",
        "weight": "0.00722830",
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      },
      {
        "name": "CG ONCOLOGY INC",
        "value": "12955245.00",
        "weight": "0.00670771",
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      },
      {
        "name": "RHYTHM PHARMACEUTICALS INC",
        "value": "12938024.00",
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      },
      {
        "name": "ENLIVEN THERAPEUTICS INC",
        "value": "12544229.90",
        "weight": "0.00649491",
        "shared": true
      },
      {
        "name": "ZENAS BIOPHARMA INC",
        "value": "11560534.92",
        "weight": "0.00598559",
        "shared": true
      },
      {
        "name": "DISC MEDICINE INC",
        "value": "11004337.04",
        "weight": "0.00569761",
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      },
      {
        "name": "ARCELLX INC",
        "value": "9761499.00",
        "weight": "0.00505412",
        "shared": false
      },
      {
        "name": "STOKE THERAPEUTICS INC",
        "value": "9639018.00",
        "weight": "0.00499070",
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      },
      {
        "name": "SONOMA BIOTHERAPEUTICS INC SER B PFD PP",
        "value": "9439952.72",
        "weight": "0.00488764",
        "shared": false
      },
      {
        "name": "TRAVERE THERAPEUTICS INC",
        "value": "9364308.00",
        "weight": "0.00484847",
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      },
      {
        "name": "MINERALYS THERAPEUTICS INC",
        "value": "8241452.00",
        "weight": "0.00426710",
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      },
      {
        "name": "CYTOMX THERAPEUTICS INC",
        "value": "7682928.19",
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      },
      {
        "name": "ANAPTYSBIO INC",
        "value": "7035644.00",
        "weight": "0.00364278",
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      },
      {
        "name": "SOLENO THERAPEUTICS INC",
        "value": "6979360.00",
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      },
      {
        "name": "CELLDEX THERAPEUTICS INC",
        "value": "6781039.20",
        "weight": "0.00351095",
        "shared": false
      },
      {
        "name": "REZOLUTE INC",
        "value": "6630234.00",
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    ],
    "b_top": [
      {
        "name": "ABBVIE INC",
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      },
      {
        "name": "KRYSTAL BIOTECH INC",
        "value": "497949724.08",
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      },
      {
        "name": "GILEAD SCIENCES INC",
        "value": "469185350.40",
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      },
      {
        "name": "AMGEN INC",
        "value": "446209716.16",
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      },
      {
        "name": "ALNYLAM PHARMACEUTICALS INC",
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      },
      {
        "name": "Fidelity Securities Lending Cash Central Fund",
        "value": "136230210.30",
        "weight": "0.02483020",
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      },
      {
        "name": "PRAXIS PRECISION MEDICINES INC",
        "value": "131500875.00",
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      },
      {
        "name": "Ascendis Pharma A/S",
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      },
      {
        "name": "INSMED INC",
        "value": "121121712.33",
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      },
      {
        "name": "UCB SA",
        "value": "116347579.17",
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      },
      {
        "name": "ARGENX SE SPONSORED ADR",
        "value": "114534900.48",
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      },
      {
        "name": "REGENERON PHARMACEUTICALS INC",
        "value": "79195677.72",
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      },
      {
        "name": "MODERNA INC",
        "value": "76740578.53",
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      },
      {
        "name": "SCHOLAR ROCK HOLDING CORP",
        "value": "73065377.23",
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      },
      {
        "name": "NATERA INC",
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      },
      {
        "name": "COGENT BIOSCIENCES INC",
        "value": "65710656.90",
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      {
        "name": "CENTESSA PHARMACEUTICALS LTD ADR",
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      },
      {
        "name": "BIOGEN INC",
        "value": "57437621.70",
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      },
      {
        "name": "ROIVANT SCIENCES LTD",
        "value": "57090487.86",
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      {
        "name": "VERTEX PHARMACEUTICALS INC",
        "value": "56092107.00",
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      {
        "name": "BRIDGEBIO PHARMA INC",
        "value": "47021569.92",
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      {
        "name": "PROTAGONIST THERAPEUTICS INC",
        "value": "46658133.04",
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      },
      {
        "name": "IMMUNOME INC",
        "value": "46598175.04",
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      },
      {
        "name": "TERNS PHARMACEUTICALS INC",
        "value": "45455314.32",
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      },
      {
        "name": "REVOLUTION MEDICINES INC",
        "value": "44763519.44",
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      },
      {
        "name": "KYMERA THERAPEUTICS INC",
        "value": "42243985.35",
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      {
        "name": "IONIS PHARMACEUTICALS INC",
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      },
      {
        "name": "ARRIVENT BIOPHARMA INC",
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      {
        "name": "CRINETICS PHARMACEUTICALS INC",
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      {
        "name": "Abivax SA SPONSORED ADS",
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      },
      {
        "name": "STRUCTURE THERAPEUTICS INC ADR",
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      },
      {
        "name": "DISC MEDICINE INC",
        "value": "35453431.88",
        "weight": "0.00646197",
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      },
      {
        "name": "GALDERMA GROUP A",
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      },
      {
        "name": "ZEALAND PHARMA A",
        "value": "33892955.59",
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      },
      {
        "name": "CYTOKINETICS INC",
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      },
      {
        "name": "CANDEL THERAPEUTICS INC",
        "value": "31037742.75",
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      },
      {
        "name": "BIO AB2 HOLDINGS LLC ARC",
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      {
        "name": "VIRIDIAN THERAPEUTICS INC",
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      },
      {
        "name": "VAXCYTE INC",
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      },
      {
        "name": "STOKE THERAPEUTICS INC",
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      {
        "name": "NUVALENT INC-A",
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      {
        "name": "APOGEE THERAPEUTICS INC",
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        "name": "TREVI THERAPEUTICS INC",
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      {
        "name": "ANNEXON INC",
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        "name": "ARROWHEAD PHARMACEUTICALS INC",
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      },
      {
        "name": "DIANTHUS THERAPEUTICS INC",
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      },
      {
        "name": "VOR BIOPHARMA INC",
        "value": "23717770.00",
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      },
      {
        "name": "EDGEWISE THERAPEUTICS INC",
        "value": "23649597.00",
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      },
      {
        "name": "UNITED THERAPEUTICS CORP DEL",
        "value": "22470412.70",
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      },
      {
        "name": "INTELLIA THERAPEUTICS INC",
        "value": "22155938.74",
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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": "0000035402-26-002648",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/320351/000003540226002648/0000035402-26-002648-index.htm"
    }
  ]
}