1,226 institutions reported holding $21.78B of OMNICOM GROUP INC (OMC) in SEC 13F filings for 2026-06-30. Largest institutional holders: VANGUARD GROUP INC ($2.56B), BlackRock, Inc. ($2.08B), STATE STREET CORP ($1.81B), Bank of New York Mellon Corp ($914.2M), JPMORGAN CHASE & CO ($895.1M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30