Company lists · Data refreshed November 2026

Top 25 Electrical system retrofitting companies worldwide

Name: Electrical system retrofitting companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 24,654 companies tracked

RevenueBase identified 24,654 company matches for electrical system retrofitting companies worldwide as of November 2026 and tracks 213,654 professional contacts across them, including 54,270 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for electrical system retrofitting companies 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 electrical system retrofitting companies 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

24,654Companies

213,654Contacts tracked

54,270Verified emails

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The 25 largest electrical system retrofitting companies worldwide

Ranked by team size

Top 25 of 24,654 company matches for electrical system retrofitting companies 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	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
2	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	Prime Electric	Exact match	Bellevue, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	724 contacts →
	Exact match “For over a quarter century, Prime has been successfully engineering, constructing building, and facilities solutions for our clientele.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Baker Electric	Exact match	Escondido, CA, United StatesHQ recorded Nov 6, 2026	501-1,000	717 contacts →
	Exact match “Baker Electric is a full-service electrical contractor and energy infrastructure expert headquartered in Escondido, California.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Cache Valley Electric	Exact match	Logan, UT, United StatesHQ recorded Nov 6, 2026	1,001-5,000	691 contacts →
	Exact match “As one of the nation’s premier electrical contractors, we don’t just provide high-quality services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	M. J. Electric, LLC	Exact match	Iron Mountain, NH, United StatesHQ recorded Nov 6, 2026	1,001-5,000	685 contacts →
	Exact match “M.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Electric Power Systems	Exact match	Maryland Heights, MI, United StatesHQ recorded Nov 6, 2026	501-1,000	678 contacts →
	Exact match “Electric Power Systems is an independent electrical testing & engineering organization.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	HOULE	Exact match	Burnaby, BC, CanadaHQ recorded Nov 6, 2026	501-1,000	669 contacts →
	Exact match “At Houle, we are passionate about bringing communities to life.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Temon Técnica DE Montagens E Construções	Exact match	Sao Paulo, BrazilHQ recorded Nov 6, 2026	1,001-5,000	664 contacts →
	Exact match “Desde 1978 atuando na execução de Instalações Elétricas e Hidráulicas, a Temon conseguiu firmar sua marca nesse mercado com participação em mais de obras por todo Brasil e…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	PAR Electrical Contractors, LLC	Exact match	Kansas City, MO, United StatesHQ recorded Nov 6, 2026	1,001-5,000	650 contacts →
	Exact match “PAR, a Quanta Services company, offers a full range of construction services for substations, overhead and underground distribution and transmission lines, engineering, design…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Alterman, INC	Exact match	Live Oak, TX, United StatesHQ recorded Nov 6, 2026	501-1,000	632 contacts →
	Exact match “Since 1923, Alterman has provided electrical construction on many of San Antonio and Austin's most impressive landmarks and contemporary structures.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	CSI Electrical Contractors, INC	Exact match	Santa Fe Springs, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	595 contacts →
	Exact match “Founded in 1990, CSI has become a leader in highly technical and innovative electrical design and construction.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Colonialwebb	Exact match	Richmond, VA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	595 contacts →
	Exact match “ColonialWebb is built on a simple belief: when people feel like they belong and have a purpose, they can achieve almost anything.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Est, S.A	Exact match	Leiria, PortugalHQ recorded Nov 6, 2026	51-200	579 contacts →
	Exact match “EST - Empresa Serviços Técnicos, S.A.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Hunt Electric	Exact match	Eagan, MN, United StatesHQ recorded Nov 6, 2026	1,001-5,000	572 contacts →
	Exact match “Hunt Electric is a national electrical design, build, and maintenance firm based in Eagan, MN.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Omexom Deutschland	Exact match	Berlin, GermanyHQ recorded Nov 6, 2026	1,001-5,000	570 contacts →
	Exact match “Omexom ist die Marke für Energieinfrastrukturen von VINCI Energies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Nrgi Elcon	Exact match	Brabrand, DenmarkHQ recorded Nov 6, 2026	1,001-5,000	544 contacts →
	Exact match “EL:CON is a solid, nationwide electrical installation company – both in regards to competences and economy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	EC Electric	Exact match	Portland, OR, United StatesHQ recorded Nov 6, 2026	1,001-5,000	541 contacts →
	Exact match “Our lives function on a power grid.” 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 “electrical system retrofitting companies”. 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 24,654 electrical system retrofitting companies worldwide

See the full list, filter by size, metro and specialty, and access 54,270 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Electrical system retrofitting companies worldwide at a glance

As of Nov 6, 2026

25.4%Verified-email coverage

8.7Average contacts per company

1-10Median size (employees)

0.8%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

12,597

11-50

8,254

51-200

2,340

201-500

439

501-1,000

129

1,001-5,000

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 electrical system retrofitting companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “electrical system retrofitting companies” 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 54,270 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.

Electrical system retrofitting companies by location

62 lists · largest first

Every Electrical system retrofitting companies 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 “electrical system retrofitting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many electrical system retrofitting companies are there worldwide?

RevenueBase identified 24,654 company matches for electrical system retrofitting companies 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?

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

Which country has the most electrical system retrofitting companies?

The United States leads with 5,965 companies, followed by the United Kingdom (2,713) and Brazil (1,194). Every electrical system retrofitting companies list by country and city is linked on this page.

Which city has the most electrical system retrofitting companies?

London leads with 188 company records, followed by Sao Paulo (136) and Houston (90).

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 54,270 professional contacts with verified work emails tracked across these 24,654 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.