Exhibit 21
MasTec, Inc.
SUBSIDIARIES OF MASTEC, INC.
December 31, 2022
NORTH AMERICA
A-1 Excavating, LLC | Wisconsin | ||||
American Civil Constructors West Coast, LLC ACC West Coast | California | ||||
American Civil Constructors, LLC ACC Mountain West | Colorado | ||||
Cash Construction Company, Inc. | Texas | ||||
Decisive Communications, Inc. | Maryland | ||||
EC Source Services, LLC | Florida | ||||
FNF Construction, Inc. | Arizona | ||||
Foothills Energy Services, Inc. | Colorado | ||||
IEA Constructors, LLC | Wisconsin | ||||
IEA Energy Services, LLC | Delaware | ||||
IEA Equipment Management, LLC IEA Equipment Management, Inc. | Delaware | ||||
IEA Intermediate Holdco, LLC | Delaware | ||||
Infrastructure and Energy Alternatives, Inc. | Delaware | ||||
Henkels & McCoy Holdings, Inc. | Pennsylvania | ||||
Intren, LLC | Illinois | ||||
Lemartec Corporation | Florida | ||||
MasTec Canada, Inc. | Canada | ||||
MasTec Comanche, LLC | Florida | ||||
MasTec Cooperateif UA | Netherlands | ||||
MasTec Network Solutions, LLC | Florida | ||||
MasTec North America, Inc. | Florida | ||||
MasTec Pipeline Holdings, LLC | Florida | ||||
MasTec TPP, LLC | Florida | ||||
New Stout Excavating Group, LLC | Wisconsin | ||||
Precision Pipeline LLC | Wisconsin | ||||
Pumpco, Inc. | Texas | ||||
Ragnar Benson, LLC | Illinois | ||||
Saiia Construction Company, LLC | Delaware | ||||
SEFNCO Communications, Inc. | California | ||||
Three Phase Line Construction, Inc. | New Hampshire | ||||
Wanzek Construction, Inc. | North Dakota | ||||
White Construction, LLC White Construction Inc. | Indiana | ||||
William Charles Construction Company, LLC | Illinois | ||||
Certain other subsidiaries have been omitted because, in the aggregate, they would not constitute a significant subsidiary.