Company lists · Data refreshed September 2026

Top 25 Critical power infrastructure companies worldwide

Name: Critical power infrastructure companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 5,334 companies tracked

RevenueBase identified 5,334 critical power infrastructure companies worldwide as of September 2026 and tracks 253,561 professional contacts across them, including 77,924 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers critical power infrastructure 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 19, 2026. Country and city lists for critical power infrastructure 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 19, 2026 86% judged on-target in blind review

5,334Companies

253,561Contacts tracked

77,924Verified emails

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The 25 largest critical power infrastructure companies worldwide

Ranked by team size

Top 25 of 5,334 critical power infrastructure companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to critical power infrastructure 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	Enel Group	Indirect evidence	Rome, ItalyHQ checked Sep 19, 2026	10001+	15,726 contacts →
	Indirect 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 19, 2026
2	Vertiv	Strong evidence	Columbus, OH, United StatesHQ checked Sep 19, 2026	10001+	14,610 contacts →
	Strong evidence “Vertiv is a global leader in critical digital infrastructure for applications in data centers, communication networks, and commercial and industrial environments.” Source: RevenueBase Database · checked Sep 19, 2026
3	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
4	Tata Power	Partial evidence	Mumbai, IndiaHQ checked Sep 19, 2026	10001+	9,414 contacts →
	Partial 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 19, 2026
5	Nextera Energy Resources	Partial evidence	Juno Beach, FL, United StatesHQ checked Sep 19, 2026	10001+	6,221 contacts →
	Partial 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
6	Power Grid Corporation Of India Limited	Partial evidence	Gurgaon, IndiaHQ checked Sep 19, 2026	5,001-10,000	5,997 contacts →
	Partial evidence “Power Grid Corporation of India Limited (POWERGRID), is a 'Maharatna' Company operating under Ministry of Power, is engaged in power transmission business.” Source: RevenueBase Database · checked Sep 19, 2026
7	Primoris Services Corporation	Strong evidence	Dallas, TX, United StatesHQ checked Sep 19, 2026	10001+	4,089 contacts →
	Strong evidence “Primoris Services Corporation (NYSE: PRIM) is a leading provider of critical infrastructure services to the utility, energy, and renewables markets throughout the United States…” Source: RevenueBase Database · checked Sep 19, 2026
8	Fieldcore	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 19, 2026	10001+	3,700 contacts →
	Partial evidence “GE Vernova is a planned, purpose-built global energy company that includes Power, Wind, and Electrification businesses and is supported by its accelerator businesses of Advanced…” Source: RevenueBase Database · checked Sep 19, 2026
9	IEC	Indirect evidence	Haifa, IsraelHQ checked Sep 19, 2026	10001+	3,195 contacts →
	Indirect evidence “The Israel Electric Corporation (IEC) is a public, government company, 99.85% of its shares are government-owned and traded on the Tel-Aviv and Singapore stock exchange.” Source: RevenueBase Database · checked Sep 19, 2026
10	M.C. Dean, INC	Indirect evidence	Tysons, VA, United StatesHQ checked Sep 19, 2026	5,001-10,000	2,761 contacts →
	Indirect evidence “M.C.” Source: RevenueBase Database · checked Sep 19, 2026
11	Ansaldo Energia	Partial evidence	Genova, ItalyHQ checked Sep 19, 2026	1,001-5,000	2,554 contacts →
	Partial evidence “Ansaldo Energia Group is an international leader in the power generation industry and a key player in the energy transition.” Source: RevenueBase Database · checked Sep 19, 2026
12	Edenor	Indirect evidence	Buenos Aires, ArgentinaHQ checked Sep 19, 2026	1,001-5,000	2,531 contacts →
	Indirect evidence “Somos la mayor distribuidora de energía eléctrica de la Argentina en términos de cantidad de clientes y electricidad vendida.” Source: RevenueBase Database · checked Sep 19, 2026
13	Société Tunisienne DE L'electricité ET DU GAZ Steg	Indirect evidence	Tunis, TunisiaHQ checked Sep 19, 2026	10001+	2,475 contacts →
	Indirect evidence “The Tunisian Company of Electricity and Gas (STEG) as a public and a non administrative company, has the essential role to : • Electrify the country • Develop the natural gas…” Source: RevenueBase Database · checked Sep 19, 2026
14	Vistra Corp	Partial evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	2,466 contacts →
	Partial 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
15	Invenergy	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,408 contacts →
	Strong evidence “Invenergy is North America’s largest privately held developer, owner, and operator of innovative, reliable power infrastructure.” Source: RevenueBase Database · checked Sep 19, 2026
16	ATCO	Indirect evidence	AB, CanadaHQ checked Sep 19, 2026	5,001-10,000	2,335 contacts →
	Indirect evidence “ATCO is a global leader in housing, energy and defence, delivering the essential services people and communities depend on every day.” Source: RevenueBase Database · checked Sep 19, 2026
17	Innio Group	Partial evidence	Munich, GermanyHQ checked Sep 19, 2026	1,001-5,000	2,111 contacts →
	Partial evidence “INNIO Group is a global distributed energy solutions provider that delivers reliable, flexible, transient, decentralized, modular and efficient power.” Source: RevenueBase Database · checked Sep 19, 2026
18	EDP Brasil	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 19, 2026	1,001-5,000	2,049 contacts →
	Indirect evidence “Com mais de 20 anos de atuação no Brasil, a EDP é uma das maiores empresas privadas do setor elétrico a operar em toda a cadeia de valor.” Source: RevenueBase Database · checked Sep 19, 2026
19	Korea Electric Power Corporation Kepco	Partial evidence	South KoreaHQ checked Sep 19, 2026	10001+	1,994 contacts →
	Partial evidence “Korea Electric Power Corporation (“KEPCO”) is a state-owned, integrated electric utility company in the Republic of Korea, whose six generation subsidiaries produce the majority…” Source: RevenueBase Database · checked Sep 19, 2026
20	Rehlko	Partial evidence	Milwaukee, WI, United StatesHQ checked Sep 19, 2026	5,001-10,000	1,709 contacts →
	Partial evidence “Rehlko is a global leader in energy resilience, delivering the solutions critical to sustain and improve life.” Source: RevenueBase Database · checked Sep 19, 2026
21	Taqa Transmission	Indirect evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 19, 2026	1,001-5,000	1,674 contacts →
	Indirect evidence “We own and operate safe, sustainable, economic and reliable transmission networks that connect generation plants to distribution companies and other customers.” Source: RevenueBase Database · checked Sep 19, 2026
22	Çalık Enerji	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 19, 2026	10001+	1,542 contacts →
	Indirect evidence “Founded in 1998, Çalık Enerji is a leading international energy company with a strong track record in delivering integrated, turn-key contracting projects across Europe, Central…” Source: RevenueBase Database · checked Sep 19, 2026
23	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
24	Pampa Energia	Indirect evidence	Caba, IndiaHQ checked Sep 19, 2026	5,001-10,000	1,352 contacts →
	Indirect evidence “Pampa Energía S.A.” Source: RevenueBase Database · checked Sep 19, 2026
25	Shermco Industries	Indirect evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,221 contacts →
	Indirect evidence “Shermco Industries is a provider of safe, reliable testing, repair, professional training, electrical outage planning, maintenance and analysis of rotating apparatus and…” 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: critical power infrastructure 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 critical power infrastructure companies.
Partial evidence: Its own public description names part of critical power infrastructure companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name critical power infrastructure 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 5,334 critical power infrastructure companies worldwide

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Critical power infrastructure companies worldwide at a glance

As of Sep 19, 2026

30.7%Verified-email coverage

47.5Average contacts per company

11-50Median size (employees)

1.1%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,878

11-50

2,060

51-200

826

201-500

238

501-1,000

128

1,001-5,000

111

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 critical power infrastructure 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: Every country. Country and city lists for critical power infrastructure companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “critical power infrastructure 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 critical power infrastructure 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 critical power infrastructure 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, 77,924 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.

Critical power infrastructure companies by location

31 lists · largest first

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

Countries

Cities

Critical power infrastructure companies based in Pune, India34

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 critical power infrastructure 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 critical power infrastructure companies are there worldwide?

RevenueBase identified 5,334 critical power infrastructure 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?

Enel Group, headquartered in Rome, tops this list with the largest team on record.

Which country has the most critical power infrastructure companies?

The United States leads with 1,236 companies, followed by India (340) and the United Kingdom (311). Every critical power infrastructure companies list by country and city is linked on this page.

Which city has the most critical power infrastructure companies?

Houston leads with 59 headquartered companies, followed by Sao Paulo (53) and Bangalore (29).

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 77,924 verified decision-maker contacts tracked across these 5,334 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.