Exhibit 21
MasTec, Inc.
SUBSIDIARIES OF MASTEC, INC.
December 31, 2021
NORTH AMERICA
A-1 Excavating, LLC (WI) | (100% owned by MasTec North America, Inc.) | ||||
Cash Construction Company, Inc. (TX) | (100% owned by MasTec North America, Inc.) | ||||
Decisive Communications, Inc. (MD) | (100% owned by MasTec North America, Inc.) | ||||
EC Source Services, LLC (FL) | (100% owned by MasTec, Inc.) | ||||
FNF Construction, Inc. (AZ) | (100% owned by Infrastructure Holdings Corporation) (DE)) (100% owned by MasTec North America, Inc.) | ||||
Henkels & McCoy Holdings, Inc. (PA) | (100% owned by MasTec, Inc.) | ||||
Intren, LLC (IL) | (100% owned by MasTec, Inc.) | ||||
Lemartec Corporation (FL) | (100% owned by MasTec North America, Inc.) | ||||
New Stout Excavating Group, LLC | (100% owned by MasTec North America, Inc.) | ||||
MasTec Canada, Inc. (Canada) | (100% owned by Pacer Construction Holdings Corporation (Canada)) (100% owned by MasTec Canadian Holdco ULC (Canada)) (100% owned by MasTec Cooperateif (UA)) | ||||
MasTec Comanche, LLC (FL) | (100% owned by MasTec Pipeline Holdings, LLC) | ||||
MasTec Cooperateif (UA) (NL) | (99.99% owned by MasTec North America, Inc.) (0.01% owned by MasTec Foreign Holdings, LLC (FL)) | ||||
MasTec Network Solutions, LLC f/k/a Nsoro MasTec, LLC (FL) | (100% owned by MasTec, Inc.) | ||||
MasTec North America, Inc. (FL) | (100% owned by MasTec, Inc.) | ||||
MasTec Pipeline Holdings, LLC (FL) | (100% owned by MasTec, Inc.) | ||||
MasTec TPP, LLC (FL) | (100% owned by MasTec Pipeline Holdings, LLC) | ||||
Precision Pipeline LLC (WI) | (100% owned by Precision Acquisition, LLC (WI)) (100% owned by MasTec, Inc.) | ||||
Pumpco, Inc. (TX) | (100% owned by MasTec North America, Inc.) | ||||
SEFNCO Communications, Inc. (CA) | (100% owned by MasTec North America, Inc.) | ||||
Three Phase Line Construction, Inc. (NH) | (100% owned by MasTec, Inc.) | ||||
Wanzek Construction, Inc. (ND) | (100% owned by MasTec North America, Inc.) | ||||
Certain other subsidiaries have been omitted because, in the aggregate, they would not constitute a significant subsidiary.