Company lists · Data refreshed September 2026

Top 25 Infrastructure companies worldwide

Name: Infrastructure companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 15, 2026 33,755 companies tracked

RevenueBase identified 33,755 infrastructure companies worldwide as of September 2026 and tracks 2,375,004 professional contacts across them, including 543,797 with verified work emails and 0 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers 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 15, 2026. Country and city lists for 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 15, 2026 86% judged on-target in blind review

33,755Companies

2,375,004Contacts tracked

543,797Verified emails

0Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest infrastructure companies worldwide

Ranked by team size

Top 25 of 33,755 infrastructure companies worldwide, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to 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	Saipem	Strong evidence	Milan, ItalyHQ checked Sep 15, 2026	10001+	34,095 contacts →
	Strong evidence “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Source: RevenueBase Database · checked Sep 15, 2026
2	Acciona	Indirect evidence	Madrid, SpainHQ checked Sep 15, 2026	10001+	27,028 contacts →
	Indirect evidence “ACCIONA champions a different way of doing business: Business as Unusual, delivering benefits far beyond the corporate realm.” Source: RevenueBase Database · checked Sep 15, 2026
3	Atkinsréalis	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 15, 2026	10001+	22,733 contacts →
	Indirect evidence “We are a world-class engineering services and nuclear organization.” Source: RevenueBase Database · checked Sep 15, 2026
4	Kiewit	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 15, 2026	10001+	19,465 contacts →
	Indirect evidence “At Kiewit, the projects we deliver make a difference, and we offer opportunities for you to make one, too.” Source: RevenueBase Database · checked Sep 15, 2026
5	Sncf Réseau	Indirect evidence	Saint-denis, FranceHQ checked Sep 15, 2026	10001+	18,948 contacts →
	Indirect evidence “SNCF Réseau : gestionnaire du réseau ferré national Etablissement public industriel et commercial (Epic), SNCF Réseau regroupe depuis le 1er janvier 2015 tous les services en…” Source: RevenueBase Database · checked Sep 15, 2026
6	Enel Group	Indirect evidence	Rome, ItalyHQ checked Sep 15, 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 15, 2026
7	Vertiv	Strong evidence	Columbus, OH, United StatesHQ checked Sep 15, 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 15, 2026
8	Tata Projects	Indirect evidence	Mumbai, IndiaHQ checked Sep 15, 2026	1,001-5,000	14,384 contacts →
	Indirect evidence “Tata Projects is one of the most admired Technology led Engineering, Procurement and Construction (EPC) companies in India.” Source: RevenueBase Database · checked Sep 15, 2026
9	Equinix	Strong evidence	Redwood City, CA, United StatesHQ checked Sep 15, 2026	10001+	13,641 contacts →
	Strong evidence “Equinix (Nasdaq: EQIX) is the world’s digital infrastructure company®, enabling digital leaders to harness a trusted platform to bring together and interconnect the foundational…” Source: RevenueBase Database · checked Sep 15, 2026
10	Adani Group	Indirect evidence	Ahmedabad, IndiaHQ checked Sep 15, 2026	10001+	12,751 contacts →
	Indirect evidence “Adani Group is a diversified organisation in India comprising 10 publicly traded companies.” Source: RevenueBase Database · checked Sep 15, 2026
11	KEC International LTD	Strong evidence	Mumbai, IndiaHQ checked Sep 15, 2026	5,001-10,000	10,868 contacts →
	Strong evidence “KEC International Limited, the flagship company of RPG Enterprises is a diversified global infrastructure Engineering, Procurement & Construction (EPC) major, with a presence in…” Source: RevenueBase Database · checked Sep 15, 2026
12	Black & Veatch	Indirect evidence	Overland Park, KS, United StatesHQ checked Sep 15, 2026	10001+	10,851 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 15, 2026
13	Downer	Indirect evidence	North Ryde, AustraliaHQ checked Sep 15, 2026	10001+	10,666 contacts →
	Indirect evidence “Enabling communities to thrive.” Source: RevenueBase Database · checked Sep 15, 2026
14	Balfour Beatty PLC	Strong evidence	London, United KingdomHQ checked Sep 15, 2026	10001+	10,507 contacts →
	Strong evidence “Balfour Beatty is a leading international infrastructure group.” Source: RevenueBase Database · checked Sep 15, 2026
15	K-Electric	Indirect evidence	Karachi, PakistanHQ checked Sep 15, 2026	10001+	10,497 contacts →
	Indirect evidence “KE (formerly Karachi Electric Supply Company) is the only vertically integrated power utility in Pakistan that generates, transmits and distributes electricity to industrial…” Source: RevenueBase Database · checked Sep 15, 2026
16	Sabesp	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 15, 2026	10001+	10,050 contacts →
	Indirect evidence “Sabesp is a mixed capital company that was founded in 1973 and is currently responsible for supplying water and collecting and treating sewage in the 375 municipalities of São…” Source: RevenueBase Database · checked Sep 15, 2026
17	COLAS	Strong evidence	Paris, FranceHQ checked Sep 15, 2026	10001+	9,918 contacts →
	Strong evidence “Colas, a subsidiary of the Bouygues Group, is a major player in the construction and maintenance of transportation infrastructure and urban development.” Source: RevenueBase Database · checked Sep 15, 2026
18	Kier Group	Strong evidence	Uk, United KingdomHQ checked Sep 15, 2026	10001+	9,491 contacts →
	Strong evidence “Our purpose is to sustainably deliver infrastructure which is vital to the UK.” Source: RevenueBase Database · checked Sep 15, 2026
19	Tata Power	Indirect evidence	Mumbai, IndiaHQ checked Sep 15, 2026	10001+	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 15, 2026
20	GMR Group	Strong evidence	New Delhi, IndiaHQ checked Sep 15, 2026	5,001-10,000	9,267 contacts →
	Strong evidence “GMR Group is a leading Indian infrastructure conglomerate with a diversified presence across Airports, Energy, Transportation, Urban Infrastructure, and Sports.” Source: RevenueBase Database · checked Sep 15, 2026
21	Hassan Allam Holding	Indirect evidence	Cairo, EgyptHQ checked Sep 15, 2026	10001+	9,091 contacts →
	Indirect evidence “Hassan Allam Holding is a leading group with a focus on engineering and construction, and investment and development.” Source: RevenueBase Database · checked Sep 15, 2026
22	Indus Towers Limited	Indirect evidence	Gurgaon, IndiaHQ checked Sep 15, 2026	5,001-10,000	8,549 contacts →
	Indirect evidence “Indus Towers Limited is one of the world’s largest telecom tower companies, formed by the merger of Bharti Infratel and Indus Towers in 2020.” Source: RevenueBase Database · checked Sep 15, 2026
23	Kinder Morgan, INC	Strong evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	10001+	8,314 contacts →
	Strong evidence “Kinder Morgan, Inc.(NYSE: KMI) is one of the largest energy infrastructure companies in North America.” Source: RevenueBase Database · checked Sep 15, 2026
24	Sulzer	Strong evidence	Winterthur, SwitzerlandHQ checked Sep 15, 2026	10001+	8,220 contacts →
	Strong evidence “Sulzer is a global leader in critical applications for core infrastructure and processes for large essential industries around the world.” Source: RevenueBase Database · checked Sep 15, 2026
25	Laing O'rourke	Strong evidence	North Sydney, United KingdomHQ checked Sep 15, 2026	10001+	8,215 contacts →
	Strong evidence “Laing O’Rourke is a global engineering and manufacturing-led construction leader, delivering state-of-the-art infrastructure and buildings projects in the UK, Australia and the…” Source: RevenueBase Database · checked Sep 15, 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: 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 infrastructure companies.
Partial evidence: Its own public description names part of infrastructure companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name 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 33,755 infrastructure companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 543,797 reachable decision-makers.

Free signup · no credit card

View the full list →

Infrastructure companies worldwide at a glance

As of Sep 15, 2026

22.9%Verified-email coverage

70.4Average contacts per company

11-50Median size (employees)

1.3%Largest-city concentration · Sao Paulo

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

8,410

11-50

11,135

51-200

7,371

201-500

3,150

501-1,000

1,439

1,001-5,000

1,511

5,001-10,000

278

10001+

284

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 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: 71 countries, largest first: the United States, India, Brazil, Italy, the United Kingdom, France, Germany, Australia, Spain, Canada and 61 more. Country and city lists for infrastructure companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “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 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 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, 543,797 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 15, 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.

Infrastructure companies by location

134 lists · largest first

Every Infrastructure 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 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 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 infrastructure companies are there worldwide?

RevenueBase identified 33,755 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?

Saipem, headquartered in Milan, tops this list with the largest team on record.

Which country has the most infrastructure companies?

The United States leads with 5,504 companies, followed by India (4,000) and Brazil (2,811). Every infrastructure companies list by country and city is linked on this page.

Which city has the most infrastructure companies?

Sao Paulo leads with 437 headquartered companies, followed by London (324) and Mumbai (286).

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 543,797 verified decision-maker contacts tracked across these 33,755 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 15, 2026.

Ready to reach these companies? Verified emails and direct dials for all 33,755 infrastructure companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.