Partners HealthCare System

Latest statistics and disclosures from Mass General Brigham's latest quarterly 13F-HR filing:

  • Top 5 stock holdings are ACWI, KRMN, RVMD, MAZE, TNGX, and represent 99.73% of Mass General Brigham's stock portfolio.
  • Added to shares of these 6 stocks: ACWI (+$653M), KRMN (+$114M), MAZE (+$9.9M), MDLN, RBRK, RVMD.
  • Started 5 new stock positions in KRMN, MDLN, MAZE, RBRK, ACWI.
  • Reduced shares in these 3 stocks: IOT (-$22M), PLRX, FULC.
  • Sold out of its positions in FULC, PLRX, IOT.
  • Mass General Brigham was a net buyer of stock by $754M.
  • Mass General Brigham has $810M in assets under management (AUM), dropping by 1756.14%.
  • Central Index Key (CIK): 0001678378

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Portfolio Holdings for Mass General Brigham

Mass General Brigham holds 7 positions in its portfolio as reported in the December 2025 quarterly 13F filing

Company (Ticker) Portfolio Weight Valued At Change in Shares Share Count Share Price
Ishares Tr Msci Acwi Etf (ACWI) 80.6 $653M NEW 4.6M 141.49
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Karman Hldgs (KRMN) 14.1 $114M NEW 1.6M 73.17
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Revolution Medicines (RVMD) 3.4 $27M 344k 79.65
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Maze Therapeatics (MAZE) 1.2 $9.9M NEW 240k 41.43
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Tango Therapeutics (TNGX) 0.4 $3.1M 354k 8.86
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Medline (MDLN) 0.1 $1.1M NEW 26k 42.00
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Rubrik (RBRK) 0.1 $1.1M NEW 14k 76.48
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Past Filings by Mass General Brigham

SEC 13F filings are viewable for Mass General Brigham going back to 2015

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