Company lists · Data refreshed September 2026
Top 25 Utility companies based in the United States
RevenueBase identified 811 utility companies headquartered in the United States as of September 2026 and tracks 291,635 professional contacts across them, including 86,554 with verified work emails. Houston is the largest hub.
This list covers utility companies headquartered in the United States, 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 22, 2026.
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.
The 25 largest utility companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 31,976 contacts → | ||||
Indirect 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 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 24,500 contacts → | ||||
Indirect 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 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 11,172 contacts → | ||||
Indirect evidence “A leading energy provider, dedicated to excellence.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 11,015 contacts → | ||||
Indirect evidence “At Entergy (NYSE: ETR), we power life.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 9,474 contacts → | ||||
Indirect evidence “We provide power to more than 10 million people and businesses across NYC and Westchester.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 9,458 contacts → | ||||
Indirect 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 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 7,790 contacts → | ||||
Strong 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 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 7,446 contacts → | ||||
Indirect evidence “Public service” is not just in our name.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 6,828 contacts → | ||||
Strong evidence “Florida Power & Light Company (FPL), a subsidiary of NextEra Energy, Inc.(NYSE: NEE), is the largest electric utility in America and provides affordable, reliable and clean…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 6,576 contacts → | ||||
Indirect 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 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 6,434 contacts → | ||||
Strong 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 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 6,294 contacts → | ||||
Indirect evidence “We're Ameren Corporation (AEE), a St.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 4,791 contacts → | ||||
Indirect evidence “Welcome to SRP, where our roots connect us to the vibrant communities we serve.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 4,744 contacts → | ||||
Strong evidence “APS is Arizona’s largest and longest serving electric utility, providing power for nearly 1.2 million customers in 11 of the state’s 15 counties.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 4,630 contacts → | ||||
Strong evidence “The Los Angeles Department of Water and Power (LADWP), the largest municipal utility in the United States, was established more than 100 years ago to deliver reliable, safe water…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4,359 contacts → | ||||
Indirect 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 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4,240 contacts → | ||||
Indirect evidence “Atmos Energy Corporation, a natural gas-only distributor, is an S&P 500 company headquartered in Dallas.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4,150 contacts → | ||||
Indirect 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 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3,513 contacts → | ||||
Indirect evidence “PPL Corporation’s family of companies provide electricity and natural gas to power our customers’ lives.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3,478 contacts → | ||||
Indirect evidence “NextEra Energy, Inc.(NYSE: NEE) is one of the largest electric power and energy infrastructure companies in North America and is a leading provider of electricity to American…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3,105 contacts → | ||||
Strong evidence “We Energies is the trade name of Wisconsin Electric Power Company and Wisconsin Gas LLC, two utility subsidiaries of WEC Energy Group.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2,961 contacts → | ||||
Indirect evidence “For generations, we’ve been powering lives and we are committed to representing social, economic, and environmental progress.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2,876 contacts → | ||||
Strong evidence “American Water (NYSE: AWK) is the largest regulated water and wastewater utility company in the United States.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2,455 contacts → | ||||
Indirect evidence “Alliant Energy Corporation (NASDAQ: LNT) provides regulated energy service to approximately 1 million electric and natural gas retail customers across Iowa and Wisconsin.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: utility companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names utility companies.
- Partial evidence
- Its own public description names part of utility companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name utility companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 811 utility companies based in the United States
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Utility companies based in the United States at a glance
As of Sep 22, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 811 companies.
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 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.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “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 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 utility companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- 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, 86,554 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 22, 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.
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 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 utility companies are there based in the United States?
RevenueBase identified 811 utility companies headquartered in the United States 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 city has the most utility companies?
Houston leads with 12 headquartered companies, followed by Austin (9) and Columbus (9).
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 86,554 verified decision-maker contacts tracked across these 811 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 22, 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 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.