Great Diamond Partners, LLC has filed a Form 13F-HR with the Securities and Exchange Commission, disclosing its equity holdings as of September 30, 2026. The report lists 238 distinct positions held by the firm.
The portfolio is heavily weighted toward large-cap technology and healthcare companies. Microsoft Corporation is the largest individual holding, with 13,987,003 shares. Other top positions include Apple Inc. with 9,266,723 shares, NVIDIA Corporation with 7,999,466 shares, and Taiwan Semiconductor Manufacturing Company with 4,845,650 shares.
Major healthcare names in the portfolio include Eli Lilly & Co. with 4,303,181 shares, Merck & Co. with 1,394,831 shares, and Abbott Laboratories with 2,196,991 shares. The filing also lists significant positions in Procter & Gamble Co. (11,409,710 shares), JPMorgan Chase & Co. (3,826,049 shares), and UnitedHealth Group (3,219,735 shares).
Great Diamond Partners, LLC is headquartered at 22 Monument Square Suite 300 in Portland, Maine. The filing was signed by John M. Piper, the firm's Chief Compliance Officer.
