Company lists · Data refreshed September 2026

Top 25 Energy utility companies worldwide

RevenueBase identified 1,577 energy utility companies worldwide as of September 2026 and tracks 390,744 professional contacts across them, including 119,520 with verified work emails and 0 with mobile numbers. Germany is the largest market and Milan the largest hub.

This list covers energy utility companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026. Country and city lists for energy utility companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review
1,577Companies
390,744Contacts tracked
119,520Verified emails
0Mobile numbers
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest energy utility companies worldwide

Ranked by team size
Top 25 of 1,577 energy utility companies worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy utility companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceRichmond, VA, United StatesHQ checked Sep 16, 202610001+31,976 contacts →

Partial evidence

“Dominion Energy (NYSE: D), headquartered in Richmond, Va, provides regulated electricity service to 3.6 million homes and businesses in Virginia, North Carolina, and South…”

Source: RevenueBase Database · checked Sep 16, 2026
2Partial evidenceCharlotte, NC, United StatesHQ checked Sep 16, 202610001+24,500 contacts →

Partial evidence

“Duke Energy, a Fortune 150 company headquartered in Charlotte, N.C, is one of America’s largest energy holding companies.”

Source: RevenueBase Database · checked Sep 16, 2026
3Partial evidenceLondon, United KingdomHQ checked Sep 16, 202610001+24,403 contacts →

Partial evidence

“We power the lives of millions of people across Britain, New York and Massachusetts, moving energy from where it’s made to the communities that need it, every single day.”

Source: RevenueBase Database · checked Sep 16, 2026
4Partial evidenceRome, ItalyHQ checked Sep 16, 202610001+15,726 contacts →

Partial evidence

“We are a multinational company reshaping the future of energy and one of the world’s leading integrated electricity operators.”

Source: RevenueBase Database · checked Sep 16, 2026
5Partial evidenceMinneapolis, MN, United StatesHQ checked Sep 16, 202610001+11,172 contacts →

Partial evidence

“A leading energy provider, dedicated to excellence.”

Source: RevenueBase Database · checked Sep 16, 2026
6Indirect evidenceNew Orleans, LA, United StatesHQ checked Sep 16, 202610001+11,015 contacts →

Indirect evidence

“At Entergy (NYSE: ETR), we power life.”

Source: RevenueBase Database · checked Sep 16, 2026
7Partial evidenceBaltimore, MD, United StatesHQ checked Sep 16, 202610001+9,458 contacts →

Partial evidence

“Constellation Energy Corporation (Nasdaq: CEG), a Fortune 200 company headquartered in Baltimore, is the nation’s largest producer of reliable, emissions-free energy and a leading…”

Source: RevenueBase Database · checked Sep 16, 2026
8Indirect evidenceMumbai, IndiaHQ checked Sep 16, 202610001+9,414 contacts →

Indirect evidence

“Tata Power is one of India’s largest integrated power companies and together with its subsidiaries and jointly controlled entities, has an installed/managed capacity of 14,294 MW.”

Source: RevenueBase Database · checked Sep 16, 2026
9Indirect evidenceWindsor, United KingdomHQ checked Sep 16, 202610001+9,238 contacts →

Indirect evidence

“Taking care of things.”

Source: RevenueBase Database · checked Sep 16, 2026
10Partial evidenceCataguases, BrazilHQ checked Sep 16, 202610001+9,212 contacts →

Partial evidence

“O Grupo Energisa tem na distribuição de energia elétrica a principal base de seu negócio.”

Source: RevenueBase Database · checked Sep 16, 2026
11Partial evidenceLondon, United KingdomHQ checked Sep 16, 202610001+8,188 contacts →

Partial evidence

“EDF is leading the charge towards An Electric Britain to help make energy more affordable and sustainable.”

Source: RevenueBase Database · checked Sep 16, 2026
12Partial evidenceChicago, IL, United StatesHQ checked Sep 16, 202610001+7,790 contacts →

Partial evidence

“Exelon Corporation (Nasdaq: EXC) is one of the nation’s largest utility companies, serving more than 10 million customers through six fully regulated utilities.”

Source: RevenueBase Database · checked Sep 16, 2026
13Indirect evidenceCampinas, BrazilHQ checked Sep 16, 202610001+7,647 contacts →

Indirect evidence

“Estamos há 113 anos construindo a história do setor elétrico brasileiro, atuando nos segmentos de distribuição, geração, transmissão, comercialização e serviços.”

Source: RevenueBase Database · checked Sep 16, 2026
14Indirect evidenceNewark, NJ, United StatesHQ checked Sep 16, 202610001+7,446 contacts →

Indirect evidence

“Public service” is not just in our name.”

Source: RevenueBase Database · checked Sep 16, 2026
15Partial evidenceHouston, TX, United StatesHQ checked Sep 16, 20265,001-10,0006,576 contacts →

Partial evidence

“CenterPoint Energy, Inc.(NYSE: CNP) is a multi-state electric and natural gas delivery company serving approximately 7 million metered customers across Indiana, Minnesota, Ohio…”

Source: RevenueBase Database · checked Sep 16, 2026
16Partial evidenceAkron, OH, United StatesHQ checked Sep 16, 202610001+6,434 contacts →

Partial evidence

“We are a forward-thinking electric utility centered on integrity, powered by a diverse team of employees committed to making customers’ lives brighter, the environment better and…”

Source: RevenueBase Database · checked Sep 16, 2026
17Indirect evidenceAtlanta, GA, United StatesHQ checked Sep 16, 202610001+5,036 contacts →

Indirect evidence

“High reliability, low prices and high customer satisfaction are cornerstones of our customer commitment, but it doesn't end there.”

Source: RevenueBase Database · checked Sep 16, 2026
18Partial evidenceWindsor, United KingdomHQ checked Sep 16, 202610001+4,555 contacts →

Partial evidence

“Centrica is an international energy services and solutions company, founded on a 200-year heritage of serving customers in homes and businesses.”

Source: RevenueBase Database · checked Sep 16, 2026
19Partial evidenceSydney, AustraliaHQ checked Sep 16, 20261,001-5,0004,401 contacts →

Partial evidence

“At AGL, we believe energy makes life better.”

Source: RevenueBase Database · checked Sep 16, 2026
20Partial evidenceKarlsruhe, GermanyHQ checked Sep 16, 202610001+4,360 contacts →

Partial evidence

“EnBW Energie Baden-Württemberg AG – our name indicates where our roots lie and what we are dedicated to.”

Source: RevenueBase Database · checked Sep 16, 2026
21Partial evidenceMerrillville, IN, United StatesHQ checked Sep 16, 20265,001-10,0004,359 contacts →

Partial evidence

“NiSource (NYSE: NI) helps energize the lives of its nearly 4 million natural gas and electric customers across six states.”

Source: RevenueBase Database · checked Sep 16, 2026
22Partial evidenceIrving, TX, United StatesHQ checked Sep 16, 2026n/a4,150 contacts →

Partial evidence

“Ambit Energy provides electricity, natural gas and solar services in numerous markets across the United States, primarily marketed through a direct sales channel of more than…”

Source: RevenueBase Database · checked Sep 16, 2026
23Partial evidenceDüsseldorf, GermanyHQ checked Sep 16, 20265,001-10,0004,117 contacts →

Partial evidence

“From gas fields and power stations to international energy markets, Uniper helps keep energy reliable.”

Source: RevenueBase Database · checked Sep 16, 2026
24Partial evidenceLondon, United KingdomHQ checked Sep 16, 20261,001-5,0003,989 contacts →

Partial evidence

“We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.”

Source: RevenueBase Database · checked Sep 16, 2026
25Indirect evidenceAllentown, PA, United StatesHQ checked Sep 16, 20265,001-10,0003,513 contacts →

Indirect evidence

“PPL Corporation’s family of companies provide electricity and natural gas to power our customers’ lives.”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 1,577 energy utility companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 119,520 reachable decision-makers.

Free signup · no credit card

View the full list →

Energy utility companies worldwide at a glance

As of Sep 16, 2026
30.6%Verified-email coverage
247.8Average contacts per company
11-50Median size (employees)
2.0%Largest-city concentration · Milan
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
469
11-50
448
51-200
330
201-500
120
501-1,000
64
1,001-5,000
86
5,001-10,000
20
10001+
31

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among energy utility companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage
12 countries, largest first: Germany, the United States, Italy, the United Kingdom, Spain, Brazil, Switzerland, France, India, Canada and 2 more. Country and city lists for energy utility companies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “energy utility companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names energy utility companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among energy utility companies, and records with no verified work email.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 119,520 across the full list. 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 September 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Energy utility companies by location

12 lists · largest first

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

Countries

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names energy utility companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many energy utility companies are there worldwide?

RevenueBase identified 1,577 energy utility companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Dominion Energy, headquartered in Richmond, tops this list with the largest team on record.

Which country has the most energy utility companies?

Germany leads with 472 companies, followed by the United States (310) and Italy (242). Every energy utility companies list by country and city is linked on this page.

Which city has the most energy utility companies?

Milan leads with 31 headquartered companies, followed by London (17) and Rome (16).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 119,520 verified decision-maker contacts tracked across these 1,577 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,577 energy utility companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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 Smart Search, 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.