990 institutions reported holding $25.90B of MASTEC (MTZ) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($3.18B), VANGUARD GROUP INC ($2.55B), PECONIC PARTNERS LLC ($1.53B), STATE STREET CORP ($934.0M), Hill City Capital, LP ($896.6M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30