{
  "page": "compare",
  "query": {
    "a": "FBIOX",
    "b": "PRHSX"
  },
  "retrieved_at": "2026-07-07T19:33:24+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": "Select Biotechnology Portfolio",
    "ticker": "FBIOX",
    "slug": "FBIOX",
    "series_id": "S000007486",
    "html_url": "https://fundwatcher.app/funds/FBIOX/"
  },
  "fund_b": {
    "name": "T. Rowe Price Health Sciences Fund, Inc.",
    "ticker": "PRHSX",
    "slug": "PRHSX",
    "series_id": "S000002088",
    "html_url": "https://fundwatcher.app/funds/PRHSX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.3240204983004480852648416726",
    "coverage_b_by_a": "0.3240204983004480852648416725",
    "shared_count": 82,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-03-31"
    },
    "a_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",
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      },
      {
        "name": "ALNYLAM PHARMACEUTICALS INC",
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      {
        "name": "Fidelity Securities Lending Cash Central Fund",
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      },
      {
        "name": "PRAXIS PRECISION MEDICINES INC",
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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",
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      },
      {
        "name": "REGENERON PHARMACEUTICALS INC",
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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",
        "value": "68971917.28",
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      },
      {
        "name": "COGENT BIOSCIENCES INC",
        "value": "65710656.90",
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      },
      {
        "name": "CENTESSA PHARMACEUTICALS LTD ADR",
        "value": "58756088.84",
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      },
      {
        "name": "BIOGEN INC",
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      },
      {
        "name": "ROIVANT SCIENCES LTD",
        "value": "57090487.86",
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      {
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      {
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      {
        "name": "PROTAGONIST THERAPEUTICS INC",
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      },
      {
        "name": "IMMUNOME INC",
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      {
        "name": "TERNS PHARMACEUTICALS INC",
        "value": "45455314.32",
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      {
        "name": "REVOLUTION MEDICINES INC",
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      },
      {
        "name": "KYMERA THERAPEUTICS INC",
        "value": "42243985.35",
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      {
        "name": "IONIS PHARMACEUTICALS INC",
        "value": "38657993.55",
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      {
        "name": "ARRIVENT BIOPHARMA INC",
        "value": "38589668.91",
        "weight": "0.00703360",
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      {
        "name": "CRINETICS PHARMACEUTICALS INC",
        "value": "38086178.10",
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      },
      {
        "name": "Abivax SA SPONSORED ADS",
        "value": "36578048.00",
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      {
        "name": "STRUCTURE THERAPEUTICS INC ADR",
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      {
        "name": "DISC MEDICINE INC",
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      {
        "name": "GALDERMA GROUP A",
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        "name": "CYTOKINETICS INC",
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        "name": "CANDEL THERAPEUTICS INC",
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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",
        "value": "28858347.54",
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      {
        "name": "NUVALENT INC-A",
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      {
        "name": "APOGEE THERAPEUTICS INC",
        "value": "27492990.00",
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      {
        "name": "TREVI THERAPEUTICS INC",
        "value": "27278741.20",
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      {
        "name": "ANNEXON INC",
        "value": "26508137.60",
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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",
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      {
        "name": "UNITED THERAPEUTICS CORP DEL",
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      {
        "name": "INTELLIA THERAPEUTICS INC",
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    ],
    "b_top": [
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      {
        "name": "THERMO FISHER SCIENTIFIC INC",
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        "name": "INTUITIVE SURGICAL INC",
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        "name": "STRYKER CORP",
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        "name": "MERCK & CO",
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      {
        "name": "ASTRAZENECA PLC",
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      {
        "name": "UNITEDHEALTH GRP",
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      {
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      {
        "name": "ABBVIE INC",
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      {
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        "name": "GILEAD SCIENCES INC",
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      {
        "name": "JOHNSON&JOHNSON",
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      {
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      {
        "name": "DANAHER CORP",
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      {
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      {
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      {
        "name": "BEONE MEDICINE-H",
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        "name": "SUMMIT THERAPEUTICS INC",
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        "name": "BRIGHTSPRING HEALTH SERVICES INC",
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      {
        "name": "BOSTON SCIENTIFIC CORP",
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        "name": "HCA HEALTHCARE INC",
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      {
        "name": "GUARDANT HEALTH INC",
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      },
      {
        "name": "CVS HEALTH CORP",
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      {
        "name": "KYMERA THERAPEUTICS INC",
        "value": "83487147.43",
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      },
      {
        "name": "THE CIGNA GROUP",
        "value": "80106092.00",
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      },
      {
        "name": "CG ONCOLOGY INC",
        "value": "75028220.64",
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      },
      {
        "name": "CARDINAL HEALTH INC",
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      },
      {
        "name": "ELEVANCE HEALTH INC",
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      },
      {
        "name": "KRYSTAL BIOTECH INC",
        "value": "70637862.32",
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      {
        "name": "SCHOLAR ROCK HOLDING CORP",
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      },
      {
        "name": "IONIS PHARMACEUTICALS INC",
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      {
        "name": "BRIDGEBIO PHARMA INC",
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      {
        "name": "CHUGAI PHARMA CO",
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      {
        "name": "STRUCTURE THERAPEUTICS INC ADR",
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      {
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      {
        "name": "CELCUITY INC",
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      {
        "name": "ROYALTY PHARMA PLC",
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      },
      {
        "name": "CENCORA INC",
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      {
        "name": "CENTESSA PHARMACEUTICALS LTD ADR",
        "value": "54320158.44",
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      },
      {
        "name": "VERA THERAPEUTICS INC",
        "value": "49716475.38",
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      },
      {
        "name": "NUVALENT INC-A",
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      },
      {
        "name": "APOGEE THERAPEUTICS INC",
        "value": "46722598.66",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "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"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001099263-26-006598",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1002624/000109926326006598/0001099263-26-006598-index.htm"
    }
  ]
}