Company lists · Data refreshed September 2026
Top 25 Private equity green companies based in the United States
RevenueBase identified 1,024 private equity green companies headquartered in the United States as of September 2026 and tracks 12,519 professional contacts across them, including 5,863 with verified work emails. New York is the largest hub.
This list covers private equity green 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 29, 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 private equity green companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 428 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 201 contacts → | ||||
Indirect evidence “WhiteWater is a management owned, Austin based infrastructure company founded in 2016.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 199 contacts → | ||||
Indirect 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 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 196 contacts → | ||||
Indirect evidence “HASI invests in sustainable infrastructure assets advancing the energy transition.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 180 contacts → | ||||
Indirect evidence “Stronghold Investment Management is an investment manager, focused on energy and natural resources, fortified by an experienced operating and technical team.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 173 contacts → | ||||
Strong 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 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 159 contacts → | ||||
Indirect evidence “Breakthrough Energy backs companies developing the next generation of clean energy solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 150 contacts → | ||||
Indirect evidence “Madison Energy Infrastructure is on a mission to modernize energy for industry and communities where it matters most.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 144 contacts → | ||||
Indirect evidence “Formed in 2005, Lime Rock Resources acquires, operates, and improves lower-risk oil and gas properties in the United States.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 141 contacts → | ||||
Indirect evidence “As a multi-strategy investment manager and independent power producer, Greenbacker Renewable Energy Company (Greenbacker) is empowering a sustainable world by connecting…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 123 contacts → | ||||
Indirect evidence “ECP (Energy Capital Partners) is an investor in critical infrastructure focused on electrification, decarbonization, reliability and sustainability.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 119 contacts → | ||||
Partial evidence “Founded in 2017, Ara Partners is a global private markets firm focused on decarbonizing the industrial economy.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 112 contacts → | ||||
Strong evidence “One Rock Capital Partners is a New York-based private equity firm with ~$10.0 billion of cumulative capital commitments focused on investing in companies across a range of…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 106 contacts → | ||||
Indirect evidence “Speed and efficiency are the cornerstones of climate finance.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 105 contacts → | ||||
Partial evidence “Equity and Fixed Income Products Sustainable investments (ESG) Alternative assets (e.g.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 99 contacts → | ||||
Indirect evidence “We work to move society towards a sustainable future through the development and management of infrastructures that generate a positive social, economic and environmental…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 94 contacts → | ||||
Indirect evidence “C-Quest Capital is a social impact project developer & carbon finance business that works in the poorest communities around the world providing access to sustainable energy…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 93 contacts → | ||||
Indirect evidence “Since 1984, Parnassus Investments has invested differently.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 91 contacts → | ||||
Strong evidence “ACON Investments is a private equity investment firm led by a cohesive team that has been investing together for over 25 years.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 80 contacts → | ||||
Indirect evidence “WE ARE CAPITAL SOLUTIONS PROVIDERS We’re building a diversified portfolio of investments, backed by hard asset collateral, supporting innovation in infrastructure.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 79 contacts → | ||||
Strong evidence “Founded in 1983, First Reserve is a leading global private equity firm investing across energy, utility, and industrial markets.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 79 contacts → | ||||
Indirect evidence “Calvert Research and Management is a leader in Responsible Investing.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 77 contacts → | ||||
Indirect evidence “Trillium Asset Management offers investment strategies and services that seek to advance humankind towards a global sustainable economy, a just society, and a better world.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 72 contacts → | ||||
Indirect evidence “It is undeniable that energy is an essential part of modern life.” Source: RevenueBase Database · checked Sep 29, 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: private equity green 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 private equity green companies.
- Partial evidence
- Its own public description names part of private equity green companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name private equity green 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 1,024 private equity green companies based in the United States
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Private equity green companies based in the United States at a glance
As of Sep 29, 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 1,024 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 private equity green 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 “private equity green 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 private equity green 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 private equity green 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, 5,863 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 29, 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.
Private equity green companies by metro
- Private equity green companies in New York150
- Private equity green companies in Houston59
- Private equity green companies in San Francisco49
- Private equity green companies in Dallas30
- Private equity green companies in Miami28
- Private equity green companies in Washington27
- Private equity green companies in Boston25
- Private equity green companies in Chicago25
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 private equity green 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 private equity green companies are there based in the United States?
RevenueBase identified 1,024 private equity green 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?
General Atlantic, headquartered in New York, tops this list with the largest team on record.
Which city has the most private equity green companies?
New York leads with 150 headquartered companies, followed by Houston (59) and San Francisco (49).
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 5,863 verified decision-maker contacts tracked across these 1,024 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 29, 2026.
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Private equity green companies by geography
- Private equity green companies based in Melbourne, Australia
- Private equity green companies based in Sydney, Australia
- Private equity green companies based in Sao Paulo, Brazil
- Private equity green companies based in Toronto, Canada
- Private equity green companies based in Paris, France
- Private equity green companies based in Berlin, Germany
- Private equity green companies based in Hamburg, Germany
- Private equity green companies based in Amsterdam, Netherlands
- Private equity green companies based in Madrid, Spain
- Private equity green companies based in Stockholm, Sweden
- Private equity green companies based in Zurich, Switzerland
- Private equity green companies based in Dubai, United Arab Emirates
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.
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