1,659 institutions reported holding $73.57B of MARSH & MCLENNAN COS INC (MMC) in SEC 13F filings for 2026-06-30. Largest institutional holders: VANGUARD GROUP INC ($8.20B), BlackRock, Inc. ($6.58B), STATE STREET CORP ($3.73B), Capital World Investors ($3.02B), WELLINGTON MANAGEMENT GROUP LLP ($2.83B). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30