MARSH & MCLENNAN COS (MMC) Institutional Ownership and Insiders Activity

MARSH & MCLENNAN COS (MMC) is widely held by institutional investors, with 8 tracked firms reporting positions valued at approximately $669.77M based on SEC Form 13F filings for the quarter ended March 31, 2026.

Parnassus Endeavor Fund is the largest disclosed holder, reporting approximately $383.40M in MMC holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Parnassus Endeavor Fund representing the majority of disclosed value.