Company lists · Data refreshed September 2026

Top 25 Infrastructure equity firms based in the United States

Name: Infrastructure equity firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,513 companies tracked

RevenueBase identified 1,513 infrastructure equity firms headquartered in the United States as of September 2026 and tracks 40,701 professional contacts across them, including 17,445 with verified work emails. New York is the largest hub.

This list covers infrastructure equity firms 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 20, 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 20, 2026 86% judged on-target in blind review

1,513Companies

40,701Contacts tracked

17,445Verified emails

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The 25 largest infrastructure equity firms based in the United States

Ranked by team size

Top 25 of 1,513 infrastructure equity firms based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure equity firms: 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	GE Capital	Partial evidence	Norwalk, CT, United StatesHQ checked Sep 20, 2026	5,001-10,000	7,253 contacts →
	Partial evidence “Every year, the infrastructure that powers our homes, transports our products, heals our loved ones, and keeps our societies moving forward needs a trillion dollars more…” Source: RevenueBase Database · checked Sep 20, 2026
2	Brookfield	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	3,915 contacts →
	Indirect evidence “We are a leading global investment firm that invests as long-term owners on behalf of institutions and individuals worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
3	Nuveen, A Tiaa Company	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,940 contacts →
	Indirect evidence “Nuveen is a global investment leader, managing public and private assets for clients around the world and on behalf of TIAA, our parent company and one of the world’s largest…” Source: RevenueBase Database · checked Sep 20, 2026
4	H.I.G. Capital	Indirect evidence	Miami, FL, United StatesHQ checked Sep 20, 2026	501-1,000	1,301 contacts →
	Indirect evidence “H.I.G.” Source: RevenueBase Database · checked Sep 20, 2026
5	Cbre Investment Management	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	501-1,000	1,295 contacts →
	Indirect evidence “Operating across every dimension of real assets investments, we see more so you can achieve more.” Source: RevenueBase Database · checked Sep 20, 2026
6	CIM Group	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 20, 2026	501-1,000	1,090 contacts →
	Partial evidence “CIM is a community-focused real estate and infrastructure owner, operator, lender and developer.” Source: RevenueBase Database · checked Sep 20, 2026
7	TA Associates	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	881 contacts →
	Partial evidence “TA is a leading global private equity firm focused on scaling growth in profitable companies.” Source: RevenueBase Database · checked Sep 20, 2026
8	General Atlantic	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	501-1,000	820 contacts →
	Indirect evidence “General Atlantic is a leading global investor with more than four and a half decades of experience providing capital and strategic support to over 830 companies throughout its…” Source: RevenueBase Database · checked Sep 20, 2026
9	LS Power	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	201-500	478 contacts →
	Partial evidence “Founded in 1990, LS Power is a premier development, investment, and operating company focused on the North American power and energy infrastructure sector, with leading platforms…” Source: RevenueBase Database · checked Sep 20, 2026
10	Synergy Consulting, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	434 contacts →
	Indirect evidence “Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Source: RevenueBase Database · checked Sep 20, 2026
11	I Squared Capital	Partial evidence	Miami, FL, United StatesHQ checked Sep 20, 2026	201-500	361 contacts →
	Partial evidence “I Squared Capital is a leading independent global infrastructure investor dedicated to the mid-market, managing more than $60 billion in assets.” Source: RevenueBase Database · checked Sep 20, 2026
12	Stonepeak	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	201-500	339 contacts →
	Partial evidence “Stonepeak is a leading alternative investment firm specializing in infrastructure and real assets with approximately $93 billion of assets under management.” Source: RevenueBase Database · checked Sep 20, 2026
13	W Capital Partners	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	n/a	337 contacts →
	Partial evidence “W Capital Partners is a private equity firm that provides secondary liquidity to shareholders in private businesses and growth capital for those companies.” Source: RevenueBase Database · checked Sep 20, 2026
14	Digitalbridge	Partial evidence	Boca Raton, FL, United StatesHQ checked Sep 20, 2026	201-500	314 contacts →
	Partial evidence “DigitalBridge is a leading global alternative asset manager dedicated to investing in digital infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
15	SB Energy	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	201-500	273 contacts →
	Partial evidence “SB Energy is enabling the new AI economy, by developing, building, and owning its critical physical infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
16	Berkshire Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	255 contacts →
	Partial evidence “Berkshire Partners is a 100% employee-owned, multi-sector specialist investor in private and public equity, with a focus on North American-based, middle-market companies.” Source: RevenueBase Database · checked Sep 20, 2026
17	Generate	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	201-500	248 contacts →
	Partial evidence “Founded in 2014, Generate builds, finances, owns and operates sustainable infrastructure to deliver affordable and reliable resource solutions for companies, governments, and…” Source: RevenueBase Database · checked Sep 20, 2026
18	Realterm	Partial evidence	Annapolis, MD, United StatesHQ checked Sep 20, 2026	201-500	242 contacts →
	Partial evidence “Realterm is a private equity sponsor focused on investments in real assets for the transportation industry.” Source: RevenueBase Database · checked Sep 20, 2026
19	Charlesbank Capital Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	236 contacts →
	Indirect evidence “Based in Boston and New York City, Charlesbank is a leading middle-market private investment firm with $21.5 billion in assets under management as of 3/31/2026.” Source: RevenueBase Database · checked Sep 20, 2026
20	Whitewater	Partial evidence	Austin, TX, United StatesHQ checked Sep 20, 2026	51-200	201 contacts →
	Partial evidence “WhiteWater is a management owned, Austin based infrastructure company founded in 2016.” Source: RevenueBase Database · checked Sep 20, 2026
21	EIG	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	199 contacts →
	Partial evidence “EIG is a leading institutional investor in the global energy and infrastructure sectors with $27.9 billion assets under management as of June 30, 2026.” Source: RevenueBase Database · checked Sep 20, 2026
22	HASI	Partial evidence	Annapolis, MD, United StatesHQ checked Sep 20, 2026	51-200	196 contacts →
	Partial evidence “HASI invests in sustainable infrastructure assets advancing the energy transition.” Source: RevenueBase Database · checked Sep 20, 2026
23	Quantum Capital Group	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	51-200	173 contacts →
	Partial evidence “Founded in 1998, Quantum Capital Group is a leading provider of private equity, credit, and venture capital to the global energy and energy transition industry, having managed…” Source: RevenueBase Database · checked Sep 20, 2026
24	Middleground Capital	Partial evidence	Lexington, KY, United StatesHQ checked Sep 20, 2026	51-200	158 contacts →
	Partial evidence “We are a private equity firm that invests in North American and European B2B middle-market industrial and specialty distribution businesses.” Source: RevenueBase Database · checked Sep 20, 2026
25	Madison Energy Infrastructure	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	150 contacts →
	Partial evidence “Madison Energy Infrastructure is on a mission to modernize energy for industry and communities where it matters most.” Source: RevenueBase Database · checked Sep 20, 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 equity firms. 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 equity firms.
Partial evidence: Its own public description names part of infrastructure equity firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure equity firms. 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 1,513 infrastructure equity firms based in the United States

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Infrastructure equity firms based in the United States at a glance

As of Sep 20, 2026

42.9%Verified-email coverage

26.9Average contacts per company

1-10Median size (employees)

14.1%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

901

11-50

455

51-200

100

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 1,513 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 infrastructure equity firms, 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 “infrastructure equity firms”. 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 equity firms), 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 equity firms, 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, 17,445 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 20, 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 equity firms by metro

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 equity firms, 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 equity firms are there based in the United States?

RevenueBase identified 1,513 infrastructure equity firms 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?

GE Capital, headquartered in Norwalk, tops this list with the largest team on record.

Which city has the most infrastructure equity firms?

New York leads with 214 headquartered companies, followed by Houston (72) and Chicago (68).

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 17,445 verified decision-maker contacts tracked across these 1,513 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 20, 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.