EX-21 6 mtz12312210-kex21.htm EX-21

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.