| INTER MIAMI FTL STADIUM, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Apr 19, 2019 | Active |
| INTER MIAMI CF, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Sep 13, 2018 | Active |
| MAS EQUITY LENDING, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Nov 24, 2014 | Active |
| MIAMI BECKHAM UNITED LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Dec 9, 2013 | Active |
| MASIFY, LLCMiami, FL · Active | Miami, FL | LLC | May 30, 2024 | Active |
| 0101 MIAMI PROPERTIES, LLCCoconut Grove, FL · Active | Coconut Grove, FL | LLC | Mar 22, 2016 | Active |
| SOUTHEASTERN LIQUIDATING CO., INC..Miami, FL · Inactive | Miami, FL | Corporation | Sep 21, 1925 | Inactive |
| HAVEN OUTDOOR THEATRE, INC.Lakeland, FL · Inactive | Lakeland, FL | Corporation | Feb 13, 1950 | Inactive |
| DESIGNED TRAFFIC INSTALLATION CO.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 8, 1965 | Inactive |
| CHURCH & TOWER OF FLORIDA, INC.Miami, FL · Inactive | Miami, FL | Corporation | Sep 19, 1968 | Inactive |
| CHURCH & TOWER COMMUNICATIONS, INC.Miami, FL · Inactive | Miami, FL | Corporation | Oct 8, 1971 | Inactive |
| DUC-MAS CORPORATIONMiami, FL · Inactive | Miami, FL | Corporation | Apr 2, 1973 | Inactive |
| MASTEC, INC.Miami, FL · Inactive | Miami, FL | Corporation | Dec 2, 1968 | Inactive |
| THE DEVINEY COMPANYMiami, FL · Inactive | Miami, FL | Corporation | May 29, 1969 | Inactive |
| BURNUP & SIMS ENTERPRISES, INC.Miami, FL · Inactive | Miami, FL | Corporation | Jan 19, 1978 | Inactive |
| BURNUP & SIMS COMTEC, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Nov 7, 1979 | Inactive |
| CHURCH & TOWER OF TN, INC.Miami, FL · Inactive | Miami, FL | Corporation | Nov 7, 1979 | Inactive |
| BURNUP & SIMS NETWORK DESIGNS, INC.Tallahassee, FL · Inactive | Tallahassee, FL | Corporation | Nov 8, 1979 | Inactive |
| MASTEC COMTEC OF THE CAROLINAS, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 27, 1980 | Inactive |
| TALLAHASSEE THEATRES, INC.Lakeland, FL · Inactive | Lakeland, FL | Corporation | Dec 31, 1981 | Inactive |
| BURNUP & SIMS COMMUNICATIONS SERVICES OF FLORIDA, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jan 12, 1982 | Inactive |
| FLOYD THEATRES, INC.Lakeland, FL · Inactive | Lakeland, FL | Corporation | Feb 18, 1983 | Inactive |
| KENDALL INDUSTRIAL PARK, LTD.Coral Gables, FL · Inactive | Coral Gables, FL | Partnership | Apr 13, 1979 | Inactive |
| CARIBBEAN BASIN INVESTMENT CORPORATIONMiami, FL · Inactive | Miami, FL | Corporation | Mar 8, 1982 | Inactive |
| CHURCH & TOWER FIBER TEL, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | May 1, 1995 | Inactive |
| MASTEC TECHNOLOGIES, INC.Miami, FL · Inactive | Miami, FL | Corporation | Oct 19, 1995 | Inactive |
| SOUTHEASTERN PRINTING OF NEW YORK, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 13, 1987 | Inactive |
| JORGE MAS & ASSOCIATES, INC.Miami, FL · Inactive | Miami, FL | Corporation | Sep 25, 1987 | Inactive |
| M3 HOLDINGS ALT, LLCCoral Gables, FL · Inactive | Coral Gables, FL | LLC | Apr 21, 2004 | Inactive |
| TWINS DEVELOPMENT LLCCoral Gables, FL · Inactive | Coral Gables, FL | LLC | Feb 28, 2005 | Inactive |
| AKERO CAPITAL FUND IV, LLCCoral Gables, FL · Inactive | Coral Gables, FL | LLC | Jan 10, 2006 | Inactive |
| AKERO CAPITAL FUND V, LLCCoral Gables, FL · Inactive | Coral Gables, FL | LLC | Jan 23, 2006 | Inactive |
| BAYSIDE 180 II, LLCCoral Gables, FL · Inactive | Coral Gables, FL | LLC | Dec 29, 2008 | Inactive |
| MAS BOOKKEEPING, LLCMiami, FL · Active | Miami, FL | LLC | Sep 14, 2026 | Active |
| JCM EQUIPMENT COMPANY, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Dec 20, 1989 | Inactive |
| COMMUNICATION CONTRACTORS, INC.Miami, FL · Inactive | Miami, FL | Corporation | Oct 12, 1984 | Inactive |
| MP EQUIPMENT RENTAL & SALES, INC.Miami, FL · Inactive | Miami, FL | Corporation | Jun 8, 1987 | Inactive |
| FREEDOM SQUARE FOUNDATION, INC.Coconut Grove, FL · Inactive | Coconut Grove, FL | Nonprofit | Mar 7, 2005 | Inactive |
| AIRPORT EXECUTIVE CENTER CONDOMINIUM ASSOCIATION, INC.Miami, FL · Inactive | Miami, FL | Nonprofit | Oct 3, 1985 | Inactive |
| MAS FAMILY FOUNDATION INC.Miami, FL · Active | Miami, FL | Nonprofit | Dec 29, 1994 | Active |
| MASTEC ITS, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | May 10, 1984 | Inactive |
| MT DORAL, INC.Coconut Grove, FL · Inactive | Coconut Grove, FL | Corporation | May 12, 2004 | Inactive |
| AKERO HOLDINGS, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Apr 12, 2005 | Inactive |
| FG BROTHERS TRANSPORT INCWest Palm Beach, FL · Inactive | West Palm Beach, FL | Corporation | Dec 14, 2012 | Inactive |
| UTILITY LINE MAINTENANCE, INC.Miami, FL · Inactive | Miami, FL | Corporation | Oct 4, 1989 | Inactive |
| ATLANTIC REAL ESTATE HOLDINGS CORP.Miami, FL · Inactive | Miami, FL | Corporation | Dec 17, 1992 | Inactive |
| FLORIDA DESIGN BUILDERS, INC.Miami, FL · Inactive | Miami, FL | Corporation | Dec 17, 1992 | Inactive |
| NEW VENTURE REALTY, INC.Miami, FL · Inactive | Miami, FL | Corporation | Apr 6, 1994 | Inactive |
| BCC CABLE SYSTEMS, INC.Miami, FL · Inactive | Miami, FL | Corporation | May 11, 1994 | Inactive |
| BURNUP & SIMS TELCOM OF FLORIDA, INC.Miami, FL · Inactive | Miami, FL | Corporation | Aug 18, 1994 | Inactive |