Mass General Brigham, Inc. has filed a Form 13F-HR with the Securities and Exchange Commission, disclosing its equity securities held as of September 30, 2026. The filing lists the company's principal executive office at 399 Revolution Drive, Suite 612, Somerville, MA 02145.
The report details a portfolio of nine equity securities held by the filer. The largest position disclosed is in Revolution Medicines Inc., where Mass General Brigham holds 344,091 shares. The company also holds significant stakes in LYNTRIS Inc., with 1,916,964 shares, and Space Exploration Technologies Corp. (SpaceX), with 234,140 shares.
Other disclosed holdings include Karman Holdings Inc., with 209,261 shares; Samsara Inc. Class A, with 39,772 shares; and Medline Inc., with 68,413 shares. The portfolio also includes positions in Maze Therapeutics Inc., Tango Therapeutics Inc., and the Vanguard International Equity Index Fund T. Rowe Price World Stock ETF.
