Company lists · Data refreshed November 2026

Top 25 Commercial wiring contractors worldwide

Name: Commercial wiring contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 36,555 companies tracked

RevenueBase identified 36,555 company matches for commercial wiring contractors worldwide as of November 2026 and tracks 360,184 professional contacts across them, including 95,012 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for commercial wiring contractors worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for commercial wiring contractors follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

36,555Companies

360,184Contacts tracked

95,012Verified emails

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The 25 largest commercial wiring contractors worldwide

Ranked by team size

Top 25 of 36,555 company matches for commercial wiring contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Rosendin	Exact match	San Jose, NC, United StatesHQ recorded Nov 6, 2026	10001+	4,838 contacts →
	Exact match “Since 1919, Rosendin has created a reputation for building quality electrical and communications installations, building value for clients, and building people.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	IES Holdings	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	5,001-10,000	2,710 contacts →
	Exact match “IES Holdings, Inc.(formerly known as Integrated Electrical Services, Inc.) provides electrical contracting services to commercial, industrial, and residential customers in the…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Quanta Services, INC	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	10001+	2,000 contacts →
	Exact match “Quanta Services (NYSE: PWR) is the leading specialty contractor with the largest and highly trained skilled workforce in North America, providing fully integrated solutions for…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Engelmig Energia	Exact match	Belo Horizonte, BrazilHQ recorded Nov 6, 2026	5,001-10,000	1,929 contacts →
	Exact match “A Engelmig foi fundada em 1985 com o objetivo de prestar serviços de engenharia em redes de distribuição de energia elétrica.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Helix Electric	Exact match	San Diego, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,666 contacts →
	Exact match “Helix Electric is an award-winning electrical contractor specializing in design-build and highly complex electrical projects throughout the United States.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Bravida Danmark A S	Exact match	Brøndby, DenmarkHQ recorded Nov 6, 2026	1,001-5,000	1,385 contacts →
	Exact match “Bravida Danmark er blandt landets største tekniske installations- og servicevirksomheder med over medarbejdere i byer landet over, og vi er en arbejdsplads, der har plads til alle.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	MJ Quinn	Exact match	Prescot, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	1,373 contacts →
	Exact match “At MJ Quinn we believe in creating great connections, with our customers, our people and our world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Facility Solutions Group	Exact match	Austin, KS, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,345 contacts →
	Exact match “Big jobs, complex systems, tight timelines.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	J Brand LTD	Exact match	London, United KingdomHQ recorded Nov 6, 2026	n/a	1,265 contacts →
	Exact match “Originally set up in 1933 by Joseph Brand as an electrical contracting and repair business in Margaret Street W1, the company today still operates today with the same guiding…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Bergelectric	Exact match	Carlsbad, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,236 contacts →
	Exact match “Since their inception in 1946, Bergelectric has made its mark on the construction industry by providing the highest quality electrical and technology contracting.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Walker Engineering	Exact match	Irving, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,161 contacts →
	Exact match “Walker Engineering has a solid reputation in the industry that is based on over 45 years of delivering top notch electrical work for a fair and competitive price.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	MYR Group	Exact match	Thornton, CO, United StatesHQ recorded Nov 6, 2026	5,001-10,000	1,137 contacts →
	Exact match “With roots dating to 1891 and employees, MYR Group Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Eecol Electric	Exact match	Calgary, AB, CanadaHQ recorded Nov 6, 2026	1,001-5,000	1,007 contacts →
	Exact match “Since 1919 EECOL Electric has provided material and technical support for the construction, industrial, and residential markets from over 60 locations in Canada.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Crawford Electric Supply	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	955 contacts →
	Exact match “Crawford Electric is more than a distributor.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Loja Elétrica Ltda	Exact match	Belo Horizonte, BrazilHQ recorded Nov 6, 2026	1,001-5,000	936 contacts →
	Exact match “Empresa genuinamente mineira, a Loja Elétrica está no mercado desde 1947 e hoje conta com 9 filiais e 6 lojas “in company”.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Archkey Solutions	Exact match	St. Louis, MO, United StatesHQ recorded Nov 6, 2026	1,001-5,000	928 contacts →
	Exact match “ArchKey, one of the largest privately held specialty trade installation and facilities services companies in the United States, is a leader in designing, building, and maintaining…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Westburne	Exact match	Mississauga, ON, CanadaHQ recorded Nov 6, 2026	1,001-5,000	875 contacts →
	Exact match “The Westburne story spans nearly a hundred years of evolution and growth.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Flanders	Exact match	Evansville, United StatesHQ recorded Nov 6, 2026	501-1,000	849 contacts →
	Exact match “FLANDERS, Leverage our legacy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Fredon	Exact match	Silverwater, AustraliaHQ recorded Nov 6, 2026	1,001-5,000	845 contacts →
	Exact match “Fredon is an Australian leader in Electrical, HVAC, Infrastructure and Technology services, backed by 24/7 national maintenance capability.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Sturgeon Electric Company, INC	Exact match	Henderson, CO, United StatesHQ recorded Nov 6, 2026	1,001-5,000	822 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Elec-Tech Electrical Contractors	Exact match	Long Beach, CA, United StatesHQ recorded Nov 6, 2026	n/a	787 contacts →
	Exact match “WELCOME TO OUR WEBSITE!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	SASCO	Exact match	Fullerton, CA, United StatesHQ recorded Nov 6, 2026	501-1,000	776 contacts →
	Exact match “SASCO has been a leader in electrical construction and low-voltage systems technologies for 50 years.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Prism Electric	Exact match	Garland, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	752 contacts →
	Exact match “Our story began in 1994 with a simple vision: Build a company that does things right.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Sonepar España	Exact match	Leganés, SpainHQ recorded Nov 6, 2026	1,001-5,000	749 contacts →
	Exact match “Sonepar Ibérica ofrece a los profesionales la gama más completa de productos y soluciones para los sectores residencial, industrial y terciario.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Baker Group	Exact match	Ankeny, IA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	731 contacts →
	Exact match “Established in 1963, Baker Group is Iowa’s premier full-service specialty contractor-serving commercial, industrial, institutional, and mission-critical markets across the country.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “commercial wiring contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 36,555 commercial wiring contractors worldwide

See the full list, filter by size, metro and specialty, and access 95,012 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial wiring contractors worldwide at a glance

As of Nov 6, 2026

26.4%Verified-email coverage

9.9Average contacts per company

1-10Median size (employees)

0.8%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

17,729

11-50

12,600

51-200

3,898

201-500

740

501-1,000

223

1,001-5,000

156

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for commercial wiring contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “commercial wiring contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 95,012 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Commercial wiring contractors by location

110 lists · largest first

Every Commercial wiring contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “commercial wiring contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial wiring contractors are there worldwide?

RevenueBase identified 36,555 company matches for commercial wiring contractors worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Rosendin tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most commercial wiring contractors?

The United States leads with 9,818 companies, followed by the United Kingdom (4,077) and Italy (1,978). Every commercial wiring contractors list by country and city is linked on this page.

Which city has the most commercial wiring contractors?

London leads with 278 company records, followed by Sao Paulo (172) and Houston (140).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 95,012 professional contacts with verified work emails tracked across these 36,555 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.