Where is Quanta Services headquartered?
In Houston, Texas, United States.
List of Quanta Services 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.
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.
| Company Name | Country | City | Address 1 | State/Province | Postal Code | Website | Founding Year | Yearly Revenue in U.S. Dollars | Employees Total | Business Legal Type - Description | Number of Companies in Group | Company 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.
In Houston, Texas, United States.
About 612 across multiple countries.
Quanta Services is publicly traded; no single majority shareholder.
Yes. Quanta Services Inc. is incorporated in the United States.
Quanta employs approximately 37,000 people worldwide.
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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.
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.
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.
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.
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.

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