EX-21.1 3 pwr-ex211x12312022.htm EX-21.1
Exhibit 21.1
Quanta Services, Inc.
Subsidiaries List
The following is a list of the subsidiaries of Quanta Services, Inc. showing the jurisdiction of incorporation or organization and the names under which each subsidiary does business (in italics). The names of certain subsidiaries may be omitted as such subsidiaries, considered as a single subsidiary, would not constitute a significant subsidiary.

Subsidiary and Names Under Which Subsidiary Does Business | Jurisdiction of Incorporation or Organization
1 Diamond, LLC Cutting Technology - 1 Diamond, LLC | Delaware
1Diamond AS | Norway
618232 Alberta Ltd. ValAir | Alberta
8246408 Canada Inc. G-TEK G-Vac | Quebec
Advanced Electric Systems, LLC Advanced Utility Testing & Maintenance, LLC Utility Testing & Maintenance, LLC | Delaware
Alexander Publications, LLC | California
Allteck GP Ltd. | British Columbia
Allteck Limited Partnership | British Columbia
Allteck USA, LLC | Delaware
American Eagle Ready Mix Utah, LLC | Delaware
Arizona Trench Company, LLC | Delaware
Arnett & Burgess Oil Field Construction Limited | Alberta
Arnett & Burgess Pipeliners (Rockies) LLC | Delaware
Arnett & Burgess Pipeliners Ltd. | Alberta
B&N Clearing and Environmental, LLC | Delaware
Banister Pipelines Constructors GP Ltd. | British Columbia
Banister Pipelines Limited Partnership | British Columbia
Blackbox Technologies International | Texas
Blattner Canada, LLC | Minnesota
Blattner Energy, LLC Blattner Energy, PLLC | Minnesota
Blattner Holding Company, LLC Blattner Company | Minnesota
Blattner Investments, LLC | Minnesota
Brent Woodward, Inc. | Oregon
Brink Constructors, Inc. Brink Constructors, Inc. A Corporation Of South Dakota | South Dakota
Cable Communication Services, LLC | Delaware
Calico Real Properties, LLC | Delaware
CanACRE (U.S.A.) Inc. | Delaware
CanACRE (USA) Brokerage, Inc. | Delaware

1

CanACRE Ltd. | British Columbia
Canadian Utility Construction GP Ltd. | British Columbia
Canadian Utility Construction Limited Partnership | British Columbia
Carolina Power & Signalization, LLC | Delaware
Catalyst Changers Inc. | Alberta
Catalyst Changers Trinidad, ULC | British Columbia
Cat-Spec, Ltd. Cat Spec Limited, LP Cat Spec, Ltd CAT SPEC, Ltd. Cat-Spec, Ltd., L.P. Cat-Spec, Ltd., LP Cat Spec, Ltd. L.P. Cat Spec, Ltd., LP Cat Spec., Ltd. LP Cat-Spec Ltd, LP CAT-SPEC, Limited Partnership CAT-SPEC, Limited Partnership CAT SPEC, Ltd. (Part Name) Cat-Spec, Ltd (A Domestic limited Partnership) Cat-Spec, Ltd. Limited Partnership | Texas
Citadel Industrial Services, Ltd. Citadel Industrial Services, L.P. Citadel Industrial Services, Ltd. Limited Partnership Citadel Industrial Services, Ltd., L.P. | Texas
Clear Power Alaska Joint Venture, LLC | Delaware
Coe Drilling Pty Ltd. Coe Group Mears Integrity Solutions | Australia
Conam Construction Co. Conam Construction Co., Inc. | Texas
Consolidated Power Projects Australia Pty Ltd Conpower Consolidated Power Industries CPP Civil | Australia
Conti Communications, Inc. | Delaware
Crux Subsurface Canada Ltd. | British Columbia
Crux Subsurface, Inc. | Delaware
D.H. Blattner & Sons, LLC | Minnesota
Dacon Corporation | Delaware
Dacon West, LLC | Delaware
Dashiell Corporation Dashiell (DE) Corporation (Dashiell Corporation) Dashiell Corporation DBA Dashiell (DE) Corporation Dacon Corporation | Delaware
Dashiell MI Corporation | Delaware
Dashiell West, LLC | Delaware
Digco Utility Construction, L.P. Digco Utility Construction Limited Partnership | Delaware
DOD Fueling Contractors Pty Ltd. | Australia

2

Dorado Specialty Services, Ltd. Dorado Specialty Services, L.P. Dorado Specialty Services, Ltd. L.P. Dorado Specialty Services. Ltd., L.P. | Texas
EHV Power ULC | British Columbia
Elite Construction of Ocala, LLC | Delaware
Elite Fabrication, Ltd. Elite Fabrication, LP | Texas
Elite Piping & Civil, Ltd. Elite Piping & Civil Limited Partnership Elite Piping & Civil Ltd, L.P. Elite Piping & Civil, Limited Partnership Elite Piping & Civil, Ltd. Limited Partnership Elite Piping & Civil, Ltd., L.P. Elite Piping and Civil, L.P. | Texas
Elite Turnaround Specialists, Ltd. Elite Turnaround Specialists Limited Partnership Elite Turnaround Specialists Limited Lp Elite Turnaround Specialists Ltd. L.P. Elite Turnaround Specialists, L.p. Elite Turnaround Specialists, Limited Partnership ELITE TURNAROUND SPECIALISTS, LTD Elite Turnaround Specialists, Ltd, Lp Elite Turnaround Specialists, Ltd. Limited Partnership Elite Turnaround Specialists, Ltd., LP Elite Turnaround Specialists, Ltd. Limited Partnership (Elite Turnaround Specialists, Ltd.) | Texas
Energy Services West, LLC | Delaware
Enscope Pty Ltd | Australia
FiberTel, LLC Fibertel Communications | Utah
FIC GP, LLC | Delaware
Field Personnel Services, LLC Field Personnel Services LLC | Delaware
First Infrastructure Capital Advisors, LLC | Delaware
First Infrastructure Capital GP, L.P. | Delaware
Five Points Construction Co. | Texas
Flare Construction, LLC Flare Construction, Inc. | Utah
Fleet Services West, LLC | Delaware
Grid Manufacturing Corporation Northwest Lineman College | Idaho
Grid Training Corporation Northwest Lineman Center Northwest Lineman College | Idaho
H.L. Chapman Pipeline Construction, Inc. | Delaware
Hallen Integrated Construction Services, LLC | Delaware
Haverfield International Incorporated Haverfield Aviation Haverfield Aviation, Inc. | Delaware
HBK Engineering, LLC HBK Engineering, PLLC | Illinois

3

Helibro, LLC | California
Heritage Midstream, LLC | Delaware
Infraestructura ETP de Mexico, S. de R.L. de C.V | Mexico
InfraSource Construction, LLC Infrasource Iowa Underground, LLC InfraSources Construction, LLC IUC ILLINOIS, LLC IUC Nebraska, LLC QS Mats Trans Tech Electric | Delaware
Infrasource Electric, LLC | Delaware
InfrasSource Pipeline Construction, LLC | Delaware
InfraSource Services, LLC | Delaware
Infrastructure Tackle & Supply, LLC | Delaware
Innoversa Mobile Solutions GP Ltd. | British Columbia
Innoversa Mobile Solutions Limited Partnership | British Columbia
Innoversa Mobile Solutions, LLC | Delaware
Intermountain Electric, Inc. Grand Electric Inc. IM Electric, Inc. Ime Electric Intermountain Electric, Inc. which will do business in California as: Colorado IM Electric Intermountain Electric, Inc., A Corporation of Colorado | Colorado
Irby Construction Company Irby Construction Company, Inc. Legend Foundation Services Marathon Construction Services | Mississippi
Irbyvalard, LLC | Delaware
Island Mechanical Corporation | Hawaii
J&R Underground LLC | Wisconsin
J.C.R. Construction Co., Inc. J.C.R. Utility Construction Co. | New Hampshire
J.W. Didado Electric, LLC | Delaware
JBT Electric, LLC | Texas
Lazy Q Ranch, LLC DE Lazy Q Ranch, LLC (De) Lazy Q Ranch, LLC Lazy Q Line School Lazy Q Line School, LLC | Delaware
Lee Electrical Construction, LLC Lee Utilities, Inc. | North Carolina
Lex Engineering Ltd. | British Columbia
Lindsey Electric, L.P. | Texas

4

M. J. Electric, LLC Great Lakes Line Builders Iron Mountain M.J. Electric, LLC IRON POWER SERVICES, A DIVISION OF M. .J ELECTRIC Iron Power Services Iron Power Services, A Division of M.J. Electric, LLC M. J. Electric, LLC – Iron Mountain M. J. Electric, LLC DBA M. J. Electric Iron Mountain, LLC M. J. ELECTRIC, LLC IRON MOUNTAIN M.J. Electric, LLC DBA M.J. Electric Iron Mountain M.J. Electric, LLC Iron Mountain MJ Drilling, A Division of M. J. Electric MJ Drilling, A Division of M. J. Electric, LLC MJ Excavating, A Division of M.J.Electric, LLC Process Controls & Instrumentation Process Controls & Instrumentation, A Division of M. J. Electric, LLC | Delaware
M.G. Dyess, LLC | Mississippi
MATG I, LLC | Delaware
Mears Canada Corp. | Nova Scotia
Mears Electric, LLC | Delaware
Mears Equipment Services, LLC Infrasource Of Pa, LLC Mears Equipment Service, LLC QPS Global Services | Delaware
Mears Group Pty Ltd | Australia
Mears Group, Inc. De Mears Group De Mears Group, Inc. Enscope Ranger Directional | Delaware
Mears Holdings, LLC Mears Holdings Ny, LLC TN Mears Holdings, LLC | Delaware
Mears Installation, LLC | Delaware
Mearsmex S. de R.L. de C.V. | Mexico
Mejia Personnel Services, LLC | Texas
Mid America Energy Services, Inc. TA Construction Tom Allen Construction Company Inc. Tom Allen Construction Company of Delaware | Delaware
MTS Quanta, LLC Mercer Technical Services MTS Field Services MTS Field Services (Richmond Co) | Texas
NACAP Niugini Ltd. | Papua New Guinea
Nacap PNG Limited | Papua New Guinea
Nacap Pty Ltd. | Australia
NLC CA., Inc. NORTHWEST LINEMAN COLLEGE | Idaho
NLC FL., Inc. Northwest Lineman Center | Idaho
NLC ID., Inc. Northwest Lineman College | Idaho

5

NLC TX., Inc. Northwest Lineman Center Northwest Lineman Training Center Northwest Lineman Training Center, Inc. | Idaho
North Houston Pole Line, L.P. North Houston Pole Line Limited Partnership QUANTA FOUNDATION SERVICES | Texas
Northern Powerline Constructors, Inc. Chatham Electric | Alaska
NorthStar Energy Services, Inc. NC Northstar Energy Services, Inc Quanta Underground Services Quanta Underground Services (Culpeper Co) Quanta Underground Services (Spotsylvania Co) Quanta Underground Services, Inc. North Star Energy, LLC | North Carolina
Northstar Energy Solutions, LLC Northstar Energy, LLC | Delaware
Nova Constructors LLC | Japan
Nova Equipment Leasing, LLC | Washington
Nova Group, Inc. NGI Construction NGI Construction, Inc. NGI Construction, Inc. (FN) Nova Group, Inc Nova Group, Inc (CA) Nova Group, Inc. DBA NGI Construction | California
Nova NextGen Solutions, LLC | Delaware
NPC Energy Services LLC | Alaska
O. J. Pipelines Canada Corporation OJ Industrial Maintenance O.J. Pipelines Canada | New Brunswick
O. J. Pipelines Canada Limited Partnership | Alberta
P.J. Helicopters, Inc. | California
PAR Electrical Contractors, LLC Didado Utility Company, Inc. J.W. Didado Electric J.W. Didado Electric, Inc. Longfellow Drilling Seaward Corp QUES | Missouri
Par Internacional, S. de R.L. de C.V. | Mexico
PAR Western Line Contractors, LLC QUES Utility Line Management Services | Delaware
Performance Energy Services Guyana, Ltd. | British Virgin Islands
Performance Energy Services, L.L.C. Fuzion Specialty Turnarounds And Piping FUZION SPECIALTY TURNAROUNDS AND PIPING | Louisiana
Phasor Engineering Inc. | Alberta
Phasor Engineering, LLC | Delaware
Phasor Geomatics, Ltd. | Alberta
Phoenix North Constructors Inc. | British Columbia

6

Phoenix Power Group, Inc. | Delaware
Potelco, Inc. Potelco, Incorporated | Washington
Price Gregory International, LLC | Delaware
Price Gregory Services, LLC | Delaware
Probst Electric, Inc. Advanced Electric Systems Probst Construction, Inc. Utility Fleet Services | Utah
QES GP, LLC | Delaware
QESC GP Ltd. | British Columbia
QPS Engineering, LLC QPS Engineering PLLC QPS Environmental QPS Global QPS Global Services QPS Global Services (Richmond Ci) QPSE | Delaware
QPS Flint, LLC QPS Flint Construction QPS Flint Tank Services QPS Professional Services Quanta Environmental Solutions Quanta EPC Services Quanta Tank Services | Delaware
QSI Engineering, Inc. | Delaware
QSI Finance (Australia) Pty Ltd. | Australia
QSI Finance (Cayman) Pvt. Ltd. | Cayman Islands
QSI Finance Canada ULC | British Columbia
QSI Finance GP (US), LLC | Delaware
QSI Finance I (US), LP | Delaware
QSI Finance II (Australia) Pty Ltd. | Australia
QSI Finance II (Lux) S.à r.l | Luxembourg
QSI Finance III (Canada) ULC | British Columbia
QSI Finance III (Lux) SARL | Luxemburg
QSI Finance IV (Canada) ULC | British Columbia
QSI Finance IX (Canada) Limited Partnership | British Columbia
QSI Finance V (US), L.P. | Delaware
QSI Finance VI (Canada) ULC | British Columbia
QSI Finance VII (Canada) Limited Partnership | British Columbia
QSI Finance VIII (Canada) ULC | British Columbia
QSI Finance X (Canada) ULC | British Columbia
QSI Holdings I (Singapore) Pte. Ltd. | Singapore
QSI Holdings II (Singapore) Pte. Ltd. | Singapore
QSI Investment AR, LLC | Delaware
QSI Investment KORE, LLC | Delaware
QSI Investment VFD, LLC | Delaware
QSI Investment West, LLC | Delaware
QSI Investment, LLC | Delaware
QSI Management, LLC | Delaware

7

QSI, Inc. De Qsi Inc. Qsi, Inc. Of Delaware CA-QSI, Inc. DE QSI INC | Delaware
QSN Lux Holdings I SCSp | Luxembourg
QSN Lux Holdings II SCSp | Luxembourg
QSN Lux Holdings III SCSp | Luxembourg
QSN Lux Holdings IV SCSp | Luxembourg
Quanta Asset Management LLC | Delaware
Quanta Associates, L.P. | Texas
Quanta Aviation Equipment Company, LLC | Delaware
Quanta Aviation Services, LLC | Delaware
Quanta Canada GP ULC | British Columbia
Quanta Canada Holdings III Limited Partnership | British Columbia
Quanta Canada Holdings LP | Alberta
Quanta Canada III GP Ltd. | British Columbia
Quanta Capital GP, LLC | Delaware
Quanta Capital LP, L.P. | Delaware
Quanta Capital Solutions, LLC | Delaware
Quanta Cares | Texas
Quanta East, LLC | Delaware
Quanta Electric Power Services West, LLC | Delaware
Quanta Electric Power Services, LLC | Delaware
Quanta Energized Innovations Ltd. | British Columbia
Quanta Energized Services of Canada Limited Partnership | British Columbia
Quanta Energized Services U.S., LLC | Delaware
Quanta Energy Services, LLC | Delaware
Quanta Equipment Company Canada GP Ltd. | Alberta
Quanta Equipment Company Canada Limited Partnership | Alberta
Quanta Equipment Company, LLC Qec, LLC | Delaware
Quanta Government Solutions, Inc. | Delaware
Quanta Infraestructura de Chile SpA | Chile
Quanta Infrastructure Holdings, LLC | Delaware
Quanta Infrastructure Services, LLC | Delaware
Quanta Infrastructure Services, S. de R.L. de C.V. | Mexico
Quanta Infrastructure Solutions Group, LLC Iron Power Services QEPC Timken Power Systems GS Quanta Electric Power Construction, LLC | Delaware
Quanta Inline Devices, LLC | Texas
Quanta Insurance Company, Inc. | Texas
Quanta International Holdings (US) LLC | Delaware
Quanta International Holdings II, Ltd. | British Virgin Islands
Quanta International Holdings IV, Ltd. | British Virgin Islands
Quanta International Holdings V Ltd. | British Virgin Islands
Quanta International Holdings VI Ltd. | British Virgin Islands
Quanta International Holdings VII, Ltd. | British Virgin Islands

8

Quanta International Holdings, Ltd. | British Virgin Islands
Quanta International Limited | British Virgin Islands
Quanta Lines Pty Ltd. | Australia
Quanta Marine Services, LLC | Delaware
Quanta Mountain West, LLC | Delaware
Quanta Power Australia Pty Ltd | Australia
Quanta Power Delivery, LLC | Delaware
Quanta Power Generation, Inc. | Delaware
Quanta Power Solutions India Private Limited | India
Quanta Services Australia Pty Ltd. | Australia
Quanta Services Chile SpA | Chile
Quanta Services Colombia S.A.S. | Colombia
Quanta Services Costa Rica, Ltda. | Costa Rica
Quanta Services Guatemala, Ltda. | Guatemala
Quanta Services International Holdings II Limited Partnership | British Columbia
Quanta Services International Holdings LP | Alberta
Quanta Services Management Partnership, L.P. | Texas
Quanta Services Netherlands B.V. Quanta Energized Services Europe Quanta Services Netherlands B.V. Quanta Technology Europe | Netherlands
Quanta Services of Canada Ltd. | British Columbia
Quanta Services Peru S.A.C. | Peru
Quanta Services Puerto Rico Holdings, LLC | Delaware
Quanta Services Solutions PR, LLC Quanta Services Puerto Rico | Puerto Rico
Quanta Services STPR, LLC Quanta Services Puerto Rico | Puerto Rico
Quanta Subsurface Canada, Ltd. | British Columbia
Quanta Technology Canada ULC | British Columbia
Quanta Technology UK Ltd. | United Kingdom
Quanta Technology, LLC Delaware Quanta Technology, LLC | Delaware
Quanta Tecnología do Brasil Ltda. | Brazil
Quanta Telecommunication Solutions, LLC Quanta Telecom Quanta Telecom Services Quanta Telecommunication Services Quanta Telecommunications Services, LLC | Delaware
Quanta Utility Installation Company, Inc. | Delaware
Quanta Utility Operations PR, LLC | Puerto Rico
Quanta Utility Operations, LLC | Delaware
Quanta West, LLC | Delaware
Quanta Workforce Solutions, LLC | Delaware
R. R. Cassidy, Inc. | Louisiana
Realtime Engineers, Inc. | Delaware
Realtime Utility Engineers, Inc. Infrasource Engineering Company, PC | Wisconsin
Redes Andinas de Comunicaciones S.R.L. | Peru

9

RMS Holdings, LLC RMS Holdings, LLC (Delaware) RMS Welding Systems Rms Welding Systems LLC RMS Welding Systems LLC RMS Welding Systems, LLC Rms Welding, LLC RMS Welding Systems LLC (Used in VA By: RMS Holdings, LLC) RMS Welding Systems, LLC (RMS Holdings, LLC) | Delaware
Road Bore Corporation | Hawaii
Robinson Brothers Construction, LLC Robinson Brothers Construction, LLC A Limited Liability Company of Delaware | Delaware
RP Construction Services, LLC | Delaware
Service Electric Company P.D.G. Electric Service EC (DE), Inc. Service Electric Company (DE) Service Electric Company of Delaware Service Electric Company Of Delaware Service Electric Company, Inc. | Delaware
Servicios de Infraestructura del Peru S.A.C. | Peru
Servicios Par Electric, S. de R.L. de C.V. | Mexico
Southern Electric Corporation of Mississippi | Mississippi
Southwest Trenching Company, Inc. | Texas
Specialty Tank Services, Ltd. Specialty Tank Services Limited Partnership Specialty Tank Services, L.P. Specialty Tank Services, Limited Partnership Specialty Tank Services, LP Specialty Tank Services, Ltd. (LP) Specialty Tank Services, Ltd. Limited Partnership Specialty Tank Services, Ltd. LP Specialty Tank Services, Ltd., L.P. Specialty Tank Services, Ltd., LP Texas Specialty Tank Services, Ltd. LP Specialty Tank Services, Ltd., LP (Used in VA by: Specialty Tank Services, Ltd.) | Texas
Stronghold General, LLC | Texas
Stronghold Holdings (BVI) Limited | British Virgin Islands
Stronghold Inspection, Ltd. Stronghold Inspection Limited Partnership Stronghold Inspection Ltd, L.P. Stronghold Inspection, L.P. Stronghold Inspection, Limited Partnership Stronghold Inspection, Ltd. Limited Partnership Stronghold Inspection, Ltd., L.P. Stronghold Inspection, L.P. (Fict Name) Stronghold Inspection, Ltd. (Part Name) Stronghold Inspection, Ltd., L.P. (Used in VA By: Stronghold Inspection, Ltd.) | Texas
Stronghold Specialty General, LLC | Texas
Stronghold Specialty, Ltd. Stronghold Specialty, Ltd. Limited Partnership | Texas

10

Stronghold Tower Group, Ltd. Stronghold Tower Group, LP Stronghold Tower Group, Ltd, LP Stronghold Tower Group, Ltd., LP | Texas
Stronghold VI, LLC | U.S. Virgin Islands
Stronghold, Ltd. Stronghold Management Holdings, LP Stronghold, Limited Partnership Stronghold, Ltd. Limited Partnership | Texas
Summit Line Construction, Inc. Summit Line Construction | Utah
Sumter Utilities, Inc. | Delaware
T. G. Mercer Consulting Services, Inc. | Texas
TC Infrastructure Services Ltd. | British Columbia
The Aspen Utility Company, LLC The Aspen Utility Company, LLC | Texas
The ComTran Group, Inc. | Georgia
The Hallen Construction Co., Inc. | New York
The Ryan Company, Inc. Ryan Company, Inc. of Massachusetts Ryan Company, Inc.(The) Ryan Company, Inc., The The Massachusetts Ryan Company, Inc. The Ryan Company Inc Of Massachusetts The Ryan Company Inc of Massachusetts The Ryan Company Inc. of Massachusetts The Ryan Company Incorporated of Massachusetts The Ryan Company Incorporated Of Massachusetts The Ryan Company Of Massachusetts, Inc. The Ryan Company of Massachusetts The Ryan Company of Massachusetts (FN) The Ryan Company of Massachusetts, Inc. The Ryan Company, Inc. (Massachusetts) The Ryan Company, Inc. of Massachusetts The Ryan Company, Incorporated Electrical Contractors | Massachusetts
TurnKey Automation, Ltd. TurnKey Automation Limited Partnership TurnKey Automation, Limited Partnership Turnkey Automation, Ltd. L.P. TurnKey Automation, Ltd. Limited Partnership TurnKey Automation, Ltd., Limited Partnership TurnKey I&E, Ltd. | Texas
Underground Construction Co., Inc. Delaware Underground Construction Co. Ucc - Underground Construction Co. UCC Underground Construction Co., Inc. Underground Construction Co., Inc. (Delaware) | Delaware
Underground Electric Construction Company, LLC | Delaware
Valard Construction (Quebec) Inc. | Quebec
Valard Construction 2008 Ltd. | Alberta
Valard Construction Australia Pty Ltd. | Australia
Valard Construction LP | Alberta

11

Valard Construction, LLC Valard | Delaware
Valard Equipment GP Ltd. | Alberta
Valard Equipment Limited Partnership | Alberta
Valard Geomatics BC, Ltd. | British Columbia
William E. Groves Construction, LLC Groves Electrical Services | Kentucky
Winco, Inc. Winco Powerline Services Winco Powerline Services Inc. Winco Powerline Services, Inc. Winco, Inc. an Oregon Based Corporation Winco, Inc. D/B/A Winco Powerline Services Winco, Inc. DBA Winco Services Inc. Winco Helicopters | Oregon

12