Mastec Inc (MTZ) Institutional Ownership

Ownership Summary

According to SEC filings for the period ending September 2025, Mastec Inc (NYSE:MTZ) is held by 636 institutional firms.

• The collective stake of institutional investors in Mastec moved to 72.6% in September 2025, a shift up from the 71.1% reported for June 2025.
• Quarterly data indicates a 0.80% shift in institutional share volume, and the annual owner count reflects an increase of 35.90%.
• A review of institutional activity for Mastec shows 298 of 636 filers increasing their positions, while 259 reduced their stake, and 79 remained unchanged.
• This class of investors increased its holdings in Mastec to 57.26Mn shares for the 13F-cycle ending September 2025, up by 456.90K shares quarter on quarter, and down 1.23Mn shares year over year.
• BlackRock, Inc.'s holding of 7.74Mn shares as of September 30, 2025 makes it the primary institutional investor in Mastec, owning 9.81% of the stock.
• Among the most significant buyers of Mastec during September 2025 were VICTORY CAPITAL MANAGEMENT INC (936.75K), Third Point LLC (725.00K), FMR LLC (460.54K), 140 Summer Partners LP (383.04K), FIRST TRUST ADVISORS LP (350.23K).
• Leading sellers of Mastec stock in September 2025 included GOLDMAN SACHS GROUP INC (499.31K), Rathbones Group PLC (484.05K), BlackRock, Inc. (420.80K), COOPER CREEK PARTNERS MANAGEMENT LLC (303.35K), MILLENNIUM MANAGEMENT LLC (248.72K).
• The top 10 institutional holders of Mastec for the quarter ending September 2025 included BlackRock, Inc. (7.74Mn), VANGUARD GROUP INC (6.01Mn), Hill City Capital, LP (2.15Mn), STATE STREET CORP (1.84Mn), Invesco Ltd. (1.66Mn), Hood River Capital Management LLC (1.65Mn), NORDEA INVESTMENT MANAGEMENT AB (1.34Mn), GEODE CAPITAL MANAGEMENT, LLC (1.13Mn), FIRST TRUST ADVISORS LP (1.02Mn), VICTORY CAPITAL MANAGEMENT INC (946.55K).