Company lists · Data refreshed September 2026

Top 25 Electricity generation companies based in the United States

Name: Electricity generation companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 119 companies tracked

RevenueBase identified 119 electricity generation companies headquartered in the United States as of September 2026 and tracks 57,015 professional contacts across them, including 17,749 with verified work emails. Houston is the largest hub.

This list covers electricity generation 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 19, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

119Companies

57,015Contacts tracked

17,749Verified emails

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The 25 largest electricity generation companies based in the United States

Ranked by team size

Top 25 of 119 electricity generation companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to electricity generation 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Entergy	Indirect evidence	New Orleans, LA, United StatesHQ checked Sep 19, 2026	10001+	11,015 contacts →
	Indirect evidence “At Entergy (NYSE: ETR), we power life.” Source: RevenueBase Database · checked Sep 19, 2026
2	Constellation	Indirect evidence	Baltimore, MD, United StatesHQ checked Sep 19, 2026	10001+	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 19, 2026
3	Nextera Energy Resources	Indirect evidence	Juno Beach, FL, United StatesHQ checked Sep 19, 2026	10001+	6,221 contacts →
	Indirect evidence “NextEra Energy Resources, LLC, together with its affiliated entities,("NextEra Energy Resources") is one of the largest energy infrastructure companies in North America.” Source: RevenueBase Database · checked Sep 19, 2026
4	Georgia Power Company	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 19, 2026	10001+	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 19, 2026
5	Vistra Corp	Strong evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	2,466 contacts →
	Strong evidence “Vistra (NYSE: VST) is a leading Fortune 500 integrated retail electricity and power generation company, based in Irving, Texas, that provides essential resources to customers…” Source: RevenueBase Database · checked Sep 19, 2026
6	Calpine	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,112 contacts →
	Partial evidence “A business unit of Constellation (NASDAQ: CEG), Calpine Corporation is America’s largest generator of electricity from natural gas and geothermal resources with operations in…” Source: RevenueBase Database · checked Sep 19, 2026
7	Luminant	Partial evidence	Dallas, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,906 contacts →
	Partial evidence “Luminant, a subsidiary of Vistra Energy, is a competitive power generation business, including mining, wholesale marketing and trading, and development operations.” Source: RevenueBase Database · checked Sep 19, 2026
8	Santee Cooper	Partial evidence	Moncks Corner, SC, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,393 contacts →
	Partial evidence “Santee Cooper is South Carolina’s largest power producer, the largest Green Power generator and the ultimate source of electricity for 2 million people across the state.” Source: RevenueBase Database · checked Sep 19, 2026
9	Talen Energy	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,100 contacts →
	Indirect evidence “Talen Energy (NASDAQ: TLN) is a leading independent power producer and energy infrastructure company dedicated to powering the future.” Source: RevenueBase Database · checked Sep 19, 2026
10	Clearway Energy Group	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	501-1,000	795 contacts →
	Indirect evidence “Clearway Energy Group’s vision is a world powered by clean energy.” Source: RevenueBase Database · checked Sep 19, 2026
11	Dynegy	Indirect evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	705 contacts →
	Indirect evidence “At Dynegy, we deliver more than just power to residential, municipal, commercial, and industrial customers across several states.” Source: RevenueBase Database · checked Sep 19, 2026
12	Mainspring Energy	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 19, 2026	201-500	479 contacts →
	Indirect evidence “Mainspring is a power generator manufacturer redefining how local power is delivered to capacity constrained companies and communities.” Source: RevenueBase Database · checked Sep 19, 2026
13	Babcock Power	Partial evidence	Danvers, MA, United StatesHQ checked Sep 19, 2026	501-1,000	476 contacts →
	Partial evidence “Finding a single capable partner to support both large- and small-scale power generation needs can be challenging.” Source: RevenueBase Database · checked Sep 19, 2026
14	Genon Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	448 contacts →
	Partial evidence “GenOn Energy, Inc.(NYSE: GEN) is one of the largest competitive generators of wholesale electricity in the United States.” Source: RevenueBase Database · checked Sep 19, 2026
15	Rocky Mountain Power	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 19, 2026	5,001-10,000	390 contacts →
	Partial evidence “At Rocky Mountain Power we believe in our promise of public service: an obligation to deliver safe, reliable electricity at an affordable price in an environmentally sustainable…” Source: RevenueBase Database · checked Sep 19, 2026
16	Grand River DAM Authority	Partial evidence	Chouteau, OK, United StatesHQ checked Sep 19, 2026	501-1,000	381 contacts →
	Partial evidence “GRDA utilizes a diverse portfolio of electric generation assets to keep rates low and reliability high.” Source: RevenueBase Database · checked Sep 19, 2026
17	Energy Harbor	Indirect evidence	Akron, OH, United StatesHQ checked Sep 19, 2026	1,001-5,000	380 contacts →
	Indirect evidence “Energy Harbor is a premier carbon free power producer and fully integrated retail energy provider.” Source: RevenueBase Database · checked Sep 19, 2026
18	Tenaska	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 19, 2026	501-1,000	331 contacts →
	Indirect evidence “Tenaska is a leading energy company with business operations that span the energy value chain.” Source: RevenueBase Database · checked Sep 19, 2026
19	IHI Power Services Corp	Partial evidence	Aliso Viejo, CA, United StatesHQ checked Sep 19, 2026	501-1,000	319 contacts →
	Partial evidence “IHI Power Services Corp.(IPSC) provides operations, maintenance, and management services to the US power generation industry.” Source: RevenueBase Database · checked Sep 19, 2026
20	RRI Energy, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	296 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
21	Competitive Power Ventures	Partial evidence	Silver Spring, MD, United StatesHQ checked Sep 19, 2026	51-200	167 contacts →
	Partial evidence “Competitive Power Ventures (CPV) has 25 years of unprecedented success in the development and operation of highly efficient and low emitting electric generation and renewable…” Source: RevenueBase Database · checked Sep 19, 2026
22	Atlantic Power & Utilities	Partial evidence	Dedham, MA, United StatesHQ checked Sep 19, 2026	201-500	153 contacts →
	Partial evidence “Atlantic Power is an independent power producer that owns power generation assets in eleven states in the United States and two provinces in Canada.” Source: RevenueBase Database · checked Sep 19, 2026
23	Alpha Generation	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	93 contacts →
	Partial evidence “Alpha Generation manages and operates power generation facilities that are well positioned to provide reliable, secure, safe, and sustainable sources of power and meet the growing…” Source: RevenueBase Database · checked Sep 19, 2026
24	Upper Peninsula Power Company	Indirect evidence	Marquette, MI, United StatesHQ checked Sep 19, 2026	51-200	90 contacts →
	Indirect evidence “Upper Peninsula Power Company (UPPCO) is a regulated electric utility delivering safe, reliable energy to approximately customers in 10 counties across Michigan's Upper Peninsula.” Source: RevenueBase Database · checked Sep 19, 2026
25	Kindle Energy	Indirect evidence	Princeton, NJ, United StatesHQ checked Sep 19, 2026	51-200	85 contacts →
	Indirect evidence “Kindle Energy develops advanced power solutions engineered to meet the growing needs of modern communities and infrastructure systems.” Source: RevenueBase Database · checked Sep 19, 2026

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: electricity generation 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 electricity generation companies.
Partial evidence: Its own public description names part of electricity generation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electricity generation 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 119 electricity generation companies based in the United States

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Electricity generation companies based in the United States at a glance

As of Sep 19, 2026

31.1%Verified-email coverage

479.1Average contacts per company

11-50Median size (employees)

13.4%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 119 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 electricity generation 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 “electricity generation 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 electricity generation 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 electricity generation 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, 17,749 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 19, 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 electricity generation 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 electricity generation companies are there based in the United States?

RevenueBase identified 119 electricity generation 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?

Entergy, headquartered in New Orleans, tops this list with the largest team on record.

Which city has the most electricity generation companies?

Houston leads with 16 headquartered companies, followed by New York (5) and Princeton (3).

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 17,749 verified decision-maker contacts tracked across these 119 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 19, 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.