List of Quanta Services subsidiaries

Verified insights into Quanta Services’ global corporate structure and subsidiaries.

Quanta Services, Inc. is a leading infrastructure services company headquartered in Houston, United States. Established to meet the growing demand for energy, communication, and utility infrastructure, Quanta operates a wide-reaching corporate structure with a network of 612 subsidiaries worldwide. This ownership information comes from CompanyData.com’s reliable corporate hierarchy database, featuring data on over 380 million companies globally.

Distribution of Quanta Services subsidiaries across regions

Quanta Services has 612 subsidiaries spread throughout 16 countries, with the majority located in the United States (514 subsidiaries, 84%), followed by Canada (61 subsidiaries, 10%), and Australia (19 subsidiaries, 3%). These key regions highlight Quanta’s focus on infrastructure services across energy, telecom, and related sectors worldwide.

Quanta Power Solutions India Private LIMITEDQuanta Power Solutions India Private LIMITED
Showing 26 of 650 companies
Company NameCountryCityAddress 1State/ProvincePostal CodeWebsiteFounding YearYearly Revenue in U.S. DollarsEmployees TotalBusiness Legal Type - DescriptionNumber of Companies in GroupCompany Registration Number
1
Quanta Power Solutions India Private LIMITED
India
New Delhi
H.no. 2, Block-s, First Floor Brahmpuri Shahdara Na Delhi
Delhi
110053
N/A
N/A
0
0
637
N/A
2
Cupertino Electric, INC.
USA
San Francisco
1740 Cesar Chavez Fl 2
San Francisco
94124
cei.*****
N/A
0
644
651
N/A
3
Wilson Construction CO.
USA
Canby
1190 Nw 3rd Ave
Clackamas
97013
wilsonconst.*****
2025
$54,442,994
550
Corporation
651
930455270
4
Hbk Engineering, LLC
USA
Chicago
921 W van Buren St Ste 100
Cook
60607
hbkengineering.*****
1999
$28,103,774
400
Corporation
651
00310891
5
The Hallen Construction CO INC
USA
Maspeth
5855 Queens Midtown Expy
Queens
11378
hallenconstruction.*****
N/A
0
326
651
N/A
6
Intermountain Electric, INC.
USA
Aurora
24251 E 64th Ave Ste 100
Arapahoe
80019
imelect.*****
1999
$53,531,542
300
Corporation
651
19871509304
7
Summit Line Construction, INC.
USA
Reno
1465 W 4th St
Washoe
89503
parelectric.*****
N/A
0
140
651
N/A
8
Grid Training CORPORATION
USA
Denton
5110 Dakota Ln
Denton
76207
lineman.*****
N/A
0
80
651
N/A
9
Irby Construction Company
USA
Kingsport
1905 Brookside Dr
Sullivan
37660
N/A
N/A
0
80
651
N/A
10
Hbk Engineering, LLC
USA
Chicago
2101 W Carroll Ave
Cook
60612
hbkengineering.*****
N/A
0
61
651
N/A
11
Quanta Technology, LLC
USA
Raleigh
4020 Westchase Blvd Ste 300
Wake
27607
quanta-technology.*****
2007
$24,266,222
55
Corporation
651
4428105
12
Irby Construction Company
USA
Lockhart
1408 Blackjack St
Caldwell
78644
irbyconstruction.*****
N/A
0
54
651
N/A
13
T. G. Mercer Consulting Services, INC.
USA
Houston
2727 North Loop W Ste 100
Harris
77008
tgmercer.*****
1989
$24,754,981
50
Corporation
651
0110305100
14
Valard Construction, LLC
USA
Houston
2800 Post Oak Blvd Ste 2600
Harris
77056
N/A
2019
$7,506,190
40
Corporation
651
N/A
15
Crux Subsurface, INC.
USA
Lancaster
1031 W Avenue L12
Los Angeles
93534
cruxsub.*****
N/A
0
40
651
N/A
16
Mussop INC
USA
Pine Bluff
5 Portea Dr
Jefferson
71601
mussop.*****
N/A
0
37
651
N/A
17
Wilson Construction CO.
USA
Woodburn
2450 Progress Way
Marion
97071
wilsonconst.*****
N/A
0
35
651
N/A
18
Service Electric Company
USA
College Park
548 Lake Mirror Rd
Glynn
30349
serviceelectricco.*****
N/A
0
34
651
N/A
19
Potelco, INC.
USA
Chino Valley
901 S State Route 89
Yavapai
86323
potelco.*****
N/A
0
28
651
N/A
20
Island Mechanical CORPORATION
USA
Kapolei
91-2461 Coral Sea Rd
Honolulu
96707
islandmechanical.*****
1993
$11,182,155
20
Corporation
651
89578 D1
21
Par Electrical Contractors, INC.
USA
Wausau
5000 Stewart Ave Ste 100
Marathon
54401
N/A
N/A
0
20
651
N/A
22
The Delphi Groupe INC
USA
Las Vegas
500 N Rainbow Blvd Ste 300
Clark
89107
N/A
N/A
0
20
651
N/A
23
North American Industrial Services, INC.
USA
Lake City
511 Se State Rd 47
Columbia
32024
N/A
N/A
0
18
651
N/A
24
Quanta Services, INC
USA
Longmont
13655 Deere Ct
Boulder
80504
quantaservices.*****
2009
$259,164
15
651
N/A
25
Brent Woodward, INC.
USA
Spokane Valley
4308 N Barker Rd
Spokane
99027
brentwoodwardinc.*****
1992
$2,507,669
13
Corporation
651
N/A
26
Dashiell CORPORATION
USA
Sulphur
4412 Maplewood Dr
Calcasieu
70663
dashiell.*****
N/A
0
8
651
N/A

Showing 26 of 650 companies

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Quanta Services’ ownership network is part of more than 41 million corporate hierarchies mapped in our company ownership database. It reveals how companies are structured and connected, showing parent entities and subsidiaries with verified data from groups across 200 countries and jurisdictions. Discover how our dataset works — and request a custom sample to see the details.

Quanta Services Company Facts

Where is Quanta Services headquartered?

In Houston, Texas, United States.

How many subsidiaries does Quanta Services have?

About 612 across multiple countries.

Who owns Quanta Services?

Quanta Services is publicly traded; no single majority shareholder.

Is Quanta Services a US company?

Yes. Quanta Services Inc. is incorporated in the United States.

How many employees work for Quanta Services?

Quanta employs approximately 37,000 people worldwide.

Corporate family tree

Why Understanding Quanta Services Ownership is Important

Knowing who owns what helps you understand how companies operate and connect. Our corporate hierarchy data lets you follow the links between parent companies, subsidiaries, and shareholders, showing control, structure, and risks within any global group. Whether you’re reviewing Quanta Services or another multinational, this insight supports compliance reviews, business research, and better data management. With verified ownership details on over 380 million companies worldwide, CompanyData.com provides a clear view of ownership across industries and borders.

How We Define Global, National, and Local Headquarters for Quanta Services

At CompanyData.com, we map company structures like that of Quanta Services using a three-level hierarchy: Global, National, and Local headquarters. This system helps reveal the role of each part within the company family.

Our three levels explained

  • Global Headquarter — The global headquarter oversees the whole group. For Quanta Services, this is the international corporate office in Houston, USA, at the top of the ownership chain.
  • National Headquarters — These are country-level entities that manage local operations and report to the global parent. For example, Quanta Canada Ltd. handles Canadian operations, while other units cover Australia and other countries.
  • Local Headquarters — Regional or city-level subsidiaries manage day-to-day business, project execution, and local compliance within their markets.

Each company is given a unique ID so you can connect subsidiaries to parents, trace ownership lines, and easily use the data in your systems.

How control is determined

We define control mainly by ownership share. When a company owns over 50% of another, it’s treated as a controlled subsidiary. Our focus on majority control relationships helps paint a clear picture of corporate hierarchies. This approach accurately maps complex ownership like Quanta Services’ and can be used for any multinational.

Why this matters for your business

Understanding this structure helps identify decision-makers within the Quanta Services Group, eases compliance checks, and supports mergers, acquisitions, or risk assessments. Using verified ownership data from CompanyData.com, users get transparent insight into how Quanta Services and similar global companies are organized. With data covering more than 612 companies linked in 12 countries including the USA [US], Canada [CA], Australia [AU], and others, our database offers clarity and confidence when working with international corporate networks.

 

How We Define Global, National, and Local Headquarters for Quanta Services

Quanta Services Global Corporate Structure

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Quanta Services ownership & subsidiary data – FAQs

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The price for our Quanta Services company data depends on the details and delivery method you choose. Whether you want a list of subsidiaries or a full dataset via API or bulk files, we offer flexible pricing to meet your needs. You can request a free quote and record count within 24 hours. Our team provides transparent pricing and a free sample of 10 company contacts. At CompanyData.com, you only pay for verified global data you require.

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At CompanyData.com, you can find detailed, verified data on Quanta Services, Inc. and all its subsidiaries, updated daily. This data includes company names, registration details, locations, industry classifications, financial metrics, and key contacts. Access and download the data via the Bold Platform, API, or bulk file delivery. Our database offers 100% worldwide company coverage ensuring complete and accurate insights.

CompanyData.com collects data from verified global business sources to ensure accuracy and comprehensive coverage. Our sources include official business registers, financial filings, LEI records, trusted partners, and verified company websites. Data is cross-checked and validated by specialists to guarantee it is accurate, current, and GDPR-compliant.

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