EX-21.1 4 mtz12312510-kex211.htm EX-21.1
Exhibit 21.1
MasTec, Inc.
SUBSIDIARIES OF MASTEC, INC.
December 31, 2025
Following is a listing of subsidiaries of MasTec, Inc., which includes the name of the subsidiary, as well as any name under which the subsidiary does business (in italics), and the subsidiary's related jurisdiction of incorporation or organization. Certain subsidiaries have been omitted given that such subsidiaries, individually or in the aggregate, would not constitute a significant subsidiary.

A-1 Excavating, LLC | Wisconsin
A-1 Express Trucking, LLC | Wisconsin
A1 Traffic Control & Safety, LLC | Colorado
Acietel Mexicana, S.A. | Mexico
Aidco de Mexico, S.A. de C.V. | Mexico
American Civil Constructors West Coast, LLC | California
American Civil Constructors, LLC ACC Mountain West | Colorado
Bakken Aggregates, LLC | Arizona
Belividere Stone, LLC | Illinois
Bianchi Electric, LLC | Delaware
Biggs Construction Company, Inc. | Virginia
BLDM – Precision, LLC | Puerto Rico
Bottom Line Services, LLC | Delaware
Broadband Access Services, Inc. | New Hampshire
Byers Engineering Company Byers Technical Services, Inc. | Georgia
C&T Insurance Company | Vermont
Casey Industrial, Inc. | Oregon
Cash Construction Company, Inc. | Texas
CCM Investment Holding Co. | Florida
CE&I Services, LLC | Florida
Church & Tower, Inc. | Florida
CIDE Engenharia, Ltda. | Brazil
CJ 320, LLC | Arizona
Condotte – Ryan JV | Florida
Condotte America Industrial Properties, LLC | Florida
Condotte America Properties, LLC | Florida
Condotte de Moya JV | Florida
Confluence Networks, LLC | Florida
Consolidated Construction Solutions I, LLC | Delaware
Consolidated Construction Solutions II, LLC | Delaware
Decisive Communications, Inc. | Maryland
DPK, LLC | Delaware
East State Stone, LLC | Delaware
EC Source Services, LLC | Florida
ECS West, LLC | Florida
Energy Erectors, Inc. | Florida

Environmental and Dewatering Solutions, LLC | Florida
Environmental Contractors, LLC | Illinois
Florence 80, LLC | Arizona
FNF Construction, Inc. | Arizona
FNF New Mexico, LLC | New Mexico
Foothills Energy Services, Inc. | Colorado
Forest City Logistics, LLC | Delaware
GGI Constructors JV | Florida
H&M Shared Services, Inc. | Pennsylvania
H.B. White Canada Corp. | Canada
Hanging H Companies, LLC | Colorado
Henkels & McCoy Holdings, Inc. | Pennsylvania
Henkels & McCoy West, LLC | Florida
Henkels & McCoy, Inc. | Pennsylvania
HMSS Realty Co., LLC | Pennsylvania
IEA Constructors, LLC | Wisconsin
IEA Energy Services, LLC | Delaware
IEA Engineering North Carolina, LLC | North Carolina
IEA Engineering, LLC | Michigan
IEA Equipment Management, LLC | Delaware
IEA Intermediate Holdco, LLC | Delaware
IEA Management Services, Inc. | Delaware
Illinois CCDD Operating Co., LLC | Illinois
Infrastructure and Energy Alternatives, Inc. | Delaware
Infrastructure Development Holdings, Inc. | Arizona
Infrastructure Holdings Corporation | Delaware
Intren West, LLC | Florida
Intren, LLC L2 Construction Management Solutions Trench-It | Illinois
John's Stone, LLC | Delaware
Johnston Quarry Holdings, LLC | Delaware
JRD Texas, LLC Maslonka Powerline Services | Texas
Kingsley Constructors, Inc. | Texas
Lemartec Corporation | Florida
Lemartec PR Corporation | Puerto Rico
Lemartec USVI, Inc. | U.S. Virgin Islands
Masco Energy Holdings, LLC | Florida
MasCo PR, LLC | Puerto Rico
MasTec Brasil S/A | Brazil
MasTec Brazil I, Inc. | Florida
MasTec Brazil II, Inc. | Florida
MasTec Canadian Holdco, Inc. | Canada
MasTec Caribbean KY, Ltd | Caymans
MasTec Caribbean PR, LLC | Puerto Rico

MasTec Civil Constructors, LLC | Florida
MasTec Civil, LLC Condotte America, LLC | Florida
MasTec Comanche, LLC | Florida
MasTec Condotte Holdings, LLC | Florida
MasTec Engineering Corp. | Michigan
MasTec ETS Service Company, LLC | Florida
MasTec EV Solutions, LLC | Delaware
MasTec Foreign Holdings, LLC | Florida
MasTec India Holdings, LLC | Florida
MasTec Industrial Corp. MasTec Power Corp. | Florida
MasTec Infraestructuras de Mexico, S. de R.L. de C.V. | Mexico
MasTec Infrastructure Holdings, LLC | Florida
MasTec International, LLC | Florida
MasTec Latin America Holdings, LLC | Delaware
MasTec Latin America, Inc. | Delaware
MasTec Mexico Foreign Holdings, LLC | Florida
MasTec Mexico Holding Company, LLC MasTec Crane & Equipment Services, Inc. MasTec Mexico Holding Company, Inc. | Florida
MasTec Network Services Colombia S.A.S. | Colombia
MasTec Network Solutions Puerto Rico, Inc. | Puerto Rico
MasTec Network Solutions, Inc. Nsoro MasTec, Inc. | Florida
MasTec Network Solutions, LLC Nsoro Acquisition, LLC Nsoro MasTec, LLC | Florida
MasTec North America, Inc. | Florida
MasTec Nsoro Procurement Company, LLC | Florida
MasTec Participacoes Do Brasil LTDA | Brazil
MasTec Philippines, LLC | Florida
MasTec Pipeline Argentina, LLC | Florida
MasTec Pipeline Holdings, LLC | Florida
MasTec Precision, LLC | Puerto Rico
MasTec Property Holdings, LLC | Nevada
MasTec Puerto Rico Engineering Services Holding, LLP | Florida
MasTec Puerto Rico Holdings, LLC | Puerto Rico
MasTec Purnell Canada, Inc. | Canada
MasTec Quadgen Wireless, LLP | India
MasTec Renewables Construction Company, Inc. | Florida
MasTec Renewables Puerto Rico, LLC | Puerto Rico
MasTec Services Company, Inc. Central America Construction, Inc. | Florida
MasTec Servicios Publicos Soterrados, S. de R. L. | Panama
MasTec Solutions Puerto Rico, LLC | Puerto Rico
MasTec Spain, Inc. | Florida

MasTec TPP, LLC | Florida
MasTec Utility Services, LLC | Florida
MasTec Venezuela, Inc. | Florida
MasTec West, LLC | Delaware
MasTec Wireless Services, LLC MasTec North America AC, LLC Nsoro Construction Services, LLC | Florida
MBS Investors, LLC | Pennsylvania
MCC Investment and Holdings, LLC | Florida
Meadow Valley Trucking, Inc. | Nevada
MNS South, LLC | Florida
MP Drilling Holdings, LLC | Florida
MSTEC Enterprises Mexico | Mexico
MTCO Energias de Mexico, S. de R.L. de C.V. | Mexico
MTZ Energias S. de R.L. de C.V. | Mexico
MTZ Enterprises, S. de R.L. de C.V. | Mexico
MTZ Purnell, Inc. | Canada
Mulford Stone, LLC | Delaware
NALL Communications, LLC | Washington
New A-1 Express, LLC | Texas
New A-1 Power, LLC | Wisconsin
New Stout Excavating Group Texas, LLC | Texas
New Stout Excavating Group, LLC | Wisconsin
Nsoro MasTec India Private, Ltd. | India
Nsoro MasTec International, Inc. | Nevada
NV2A Bahamas, LLC | Bahamas
NV2A Construction, LLC | Florida
NV2A Group, LLC | Florida
NV2A Infrastructure, LLC | Florida
Phoenix Industrial, Inc. | Washington
Porter Brothers, LLC | Illinois
Porter's Stone, LLC | Delaware
PPMASI Klamath I, LLC | Delaware
Precision Acquisition, LLC | Wisconsin
Precision Aggregate Products, LLC | Nevada
Precision Dewatering, LLC | Florida
Precision Engineering Solutions, LLC | Florida
Precision Fabrication Services, LLC | Florida
Precision Infrastructure, LLC | Florida
Precision Pipeline, LLC | Wisconsin
Precision Transport Company, LLC | Wisconsin
Precision West, LLC | Florida
Pretec Directional Drilling, LLC | Florida
Pumpco, Inc. | Texas
Quadgen Wireless Solutions, Inc. | Delaware

R&J Leasing, Inc. | New Hampshire
R.J. Carroll Company, LLC | Texas
Ragnar Benson, LLC | Illinois
Rhino Cable Services, Inc. | Pennsylvania
Rockford Blacktop Construction Co., LLC | Illinois
Saiia Construction Company, LLC | Delaware
Saiia Holdings, LLC | Delaware
SEFNCO Communications, Inc. | Washington
Sequoia Utility Services, LLC | Florida
Shade Tree Service Company | Missouri
Stout Construction, LLC | Wisconsin
Stout Trucking, LLC | Wisconsin
Structors, Inc. | Illinois
Support Operations Services, LLC | Florida
SUS Holdings, LLC | Florida
T & D Power, Inc. | Nevada
Thornton 40, LLC | Arizona
Three Phase Line Construction, Inc. | New Hampshire
Three-Way 28, LLC | Arizona
Union Real Estate, LLC | Illinois
Utility Services Group West, LLC | Florida
Wanzek Construction, Inc. | North Dakota
White Construction Energy Services, LLC | Delaware
White Construction, LLC | Indiana
William Charles Construction Company, LLC | Illinois
William Charles Electric, LLC | Delaware
William Charles Purchasing, Inc. | Illinois
William Charles, Inc. | Nevada
WYCO Field Services, LLC | Wyoming