| JRM ALVAH HOLDINGS, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Dec 15, 2021 | Active |
| JOSE RAMON MAS HOLDINGS, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Oct 6, 2014 | Active |
| CHURCH & TOWER OF FLORIDA, INC.Miami, FL · Inactive | Miami, FL | Corporation | Sep 19, 1968 | Inactive |
| JORGE MAS CANOSA FREEDOM FOUNDATION, INC.Miami, FL · Active | Miami, FL | Nonprofit | Jul 6, 1981 | Active |
| LATLINK CORPORATIONCoral Gables, FL · Inactive | Coral Gables, FL | Corporation | Dec 28, 1995 | Inactive |
| FLAIRE, INC. OF MISSOURICoral Gables, FL · Inactive | Coral Gables, FL | Corporation | Mar 8, 1999 | Inactive |
| M3 HOLDINGS ALT, LLCCoral Gables, FL · Inactive | Coral Gables, FL | LLC | Apr 21, 2004 | Inactive |
| PONCE CIRCLE DEVELOPERS, L.L.C.Coral Gables, FL · Inactive | Coral Gables, FL | LLC | Mar 9, 2005 | Inactive |
| SOL MAS, LLCCoral Gables, FL · Inactive | Coral Gables, FL | LLC | Feb 27, 2006 | Inactive |
| CMA HOMES 3975 LITTLE AVE, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Dec 9, 2025 | Active |
| CMA HOMES 6500 N BAY RD, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Mar 31, 2026 | Active |
| CMA HOMES 16 PALM AVE, LLCCoral Gables, FL · Active | Coral Gables, FL | LLC | Apr 21, 2026 | Active |
| CHURCH & TOWER, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Aug 22, 1990 | Active |
| MASCAP DEVELOPMENT, L.C.Coral Gables, FL · Inactive | Coral Gables, FL | LLC | Aug 14, 1997 | Inactive |
| MAS FAMILY FOUNDATION INC.Miami, FL · Active | Miami, FL | Nonprofit | Dec 29, 1994 | Active |
| RENEGADE OF IDAHO, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Jun 15, 2000 | Inactive |
| DRESSER ACQUISITION COMPANYCoral Gables, FL · Inactive | Coral Gables, FL | Corporation | Aug 8, 2000 | Inactive |
| AKERO HOLDINGS, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Apr 12, 2005 | Inactive |
| MIAMI SHARKS INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Mar 7, 2012 | Inactive |
| ATLANTIC REAL ESTATE HOLDINGS CORP.Miami, FL · Inactive | Miami, FL | Corporation | Dec 17, 1992 | Inactive |
| PROTEL IND., INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Mar 6, 1997 | Inactive |
| PHASECOM AMERICA INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Aug 1, 1997 | Inactive |
| FREEDOM TOWER PARTNER III, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Sep 2, 1997 | Inactive |
| MAS DEVELOPMENT, INC.Miami, FL · Inactive | Miami, FL | Corporation | Sep 8, 1997 | Inactive |
| MASTEC SERVICES COMPANY, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Oct 13, 1997 | Active |
| MASTEC, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Apr 8, 1998 | Active |
| MASTEC NORTH AMERICA, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Apr 15, 1998 | Active |
| MASTEC INTERNATIONAL HOLDINGS, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Jan 5, 1999 | Inactive |
| MASTEC VENEZUELA, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Jan 5, 1999 | Active |
| MASTEC SPAIN, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Jan 5, 1999 | Active |
| MASTEC BRAZIL I, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Jan 11, 1999 | Active |
| MASTEC BRAZIL II, INC.Coral Gables, FL · Active | Coral Gables, FL | Corporation | Jan 12, 1999 | Active |
| MASTEC ECUADOR, INC.Coral Gables, FL · Inactive | Coral Gables, FL | Corporation | Jan 13, 1999 | Inactive |