Company lists · Data refreshed September 2026

Top 25 Private equity climate investors based in the United States

Name: Private equity climate investors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 987 companies tracked

RevenueBase identified 987 private equity climate investors headquartered in the United States as of September 2026 and tracks 20,253 professional contacts across them, including 8,297 with verified work emails and 6,691 with mobile numbers. New York is the largest hub.

This list covers private equity climate investors 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

987Companies

20,253Contacts tracked

8,297Verified emails

6,691Mobile numbers

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The 25 largest private equity climate investors based in the United States

Ranked by team size

Top 25 of 987 private equity climate investors based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names private equity climate investors: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	CarrierPartial evidence	Palm Beach Gardens, FL, United StatesHQ checked Sep 5, 2026	10001+	7,665
	“Carrier is a global leader in intelligent climate and energy solutions, pioneering sustainable innovations in climate technologies.” Source: company website · checked Sep 5, 2026
2	General AtlanticPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	820
	“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: company website · checked Sep 5, 2026
3	W Capital PartnersStrong evidence	New York, NY, United StatesHQ checked Sep 5, 2026	n/a	337
	“W Capital Partners is a private equity firm that provides secondary liquidity to shareholders in private businesses and growth capital for those companies.” Source: company website · checked Sep 5, 2026
4	3degrees Group, INCPartial evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	201-500	324
	“3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Source: company website · checked Sep 5, 2026
5	Anew ClimateStrong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	200
	“Anew Climate is a global leader of diverse climate solutions, bringing innovative products and services to the public and private sectors to help reduce or offset their carbon…” Source: company website · checked Sep 5, 2026
6	EIGPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	199
	“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: company website · checked Sep 5, 2026
7	HASIIndirect evidence	Annapolis, MD, United StatesHQ checked Sep 5, 2026	51-200	196
	“HASI invests in sustainable infrastructure assets advancing the energy transition.” Source: company website · checked Sep 5, 2026
8	Khosla VenturesIndirect evidence	Menlo Park, CA, United StatesHQ checked Sep 5, 2026	51-200	193
	“Khosla Ventures invests in companies that are bold, early and impactful.” Source: company website · checked Sep 5, 2026
9	Stronghold Investment ManagementIndirect evidence	Dallas, TX, United StatesHQ checked Sep 5, 2026	51-200	180
	“Stronghold Investment Management is an investment manager, focused on energy and natural resources, fortified by an experienced operating and technical team.” Source: company website · checked Sep 5, 2026
10	Quantum Capital GroupStrong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	173
	“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: company website · checked Sep 5, 2026
11	Breakthrough EnergyIndirect evidence	Kirkland, United StatesHQ checked Sep 5, 2026	51-200	159
	“Breakthrough Energy backs companies developing the next generation of clean energy solutions.” Source: company website · checked Sep 5, 2026
12	GreenbackerIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	141
	“As a multi-strategy investment manager and independent power producer, Greenbacker Renewable Energy Company (Greenbacker) is empowering a sustainable world by connecting…” Source: company website · checked Sep 5, 2026
13	Levine Leichtman Capital Partners, LLCStrong evidence	Beverly Hills, CA, United StatesHQ checked Sep 5, 2026	51-200	124
	“LLCP is a middle-market private equity firm with a 42-year track record of investing across various targeted sectors, including Business Services, Franchising & Multi-unit…” Source: company website · checked Sep 5, 2026
14	ECP Energy Capital PartnersPartial evidence	Summit, NJ, United StatesHQ checked Sep 5, 2026	51-200	123
	“ECP (Energy Capital Partners) is an investor in critical infrastructure focused on electrification, decarbonization, reliability and sustainability.” Source: company website · checked Sep 5, 2026
15	ARA PartnersPartial evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	119
	“Founded in 2017, Ara Partners is a global private markets firm focused on decarbonizing the industrial economy.” Source: company website · checked Sep 5, 2026
16	ONE Rock Capital Partners, LLCStrong evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	112
	“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: company website · checked Sep 5, 2026
17	CleancapitalPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	106
	“Speed and efficiency are the cornerstones of climate finance.” Source: company website · checked Sep 5, 2026
18	AXA Investment ManagersPartial evidence	New York City, NY, United StatesHQ checked Sep 5, 2026	10001+	105
	“Equity and Fixed Income Products Sustainable investments (ESG) Alternative assets (e.g.” Source: company website · checked Sep 5, 2026
19	Parnassus InvestmentsIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	51-200	93
	“Since 1984, Parnassus Investments has invested differently.” Source: company website · checked Sep 5, 2026
20	Acon Investments, L.L.CStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	91
	“ACON Investments is a private equity investment firm led by a cohesive team that has been investing together for over 25 years.” Source: company website · checked Sep 5, 2026
21	SEAFStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	85
	“Small Enterprise Assistance Funds (SEAF) is a global impact private equity manager focused on providing growth capital and operational support to small and medium-sized…” Source: company website · checked Sep 5, 2026
22	OICIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	11-50	80
	“WE ARE CAPITAL SOLUTIONS PROVIDERS We’re building a diversified portfolio of investments, backed by hard asset collateral, supporting innovation in infrastructure.” Source: company website · checked Sep 5, 2026
23	First ReserveStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	51-200	79
	“Founded in 1983, First Reserve is a leading global private equity firm investing across energy, utility, and industrial markets.” Source: company website · checked Sep 5, 2026
24	Calvert Research And ManagementIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	79
	“Calvert Research and Management is a leader in Responsible Investing.” Source: company website · checked Sep 5, 2026
25	Enduring PlanetPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	79
	“Working capital and fractional financial services for Climate startups and SMBs.” Source: company website · checked Sep 5, 2026

Showing 25 of 987 private equity climate investors based in the United States

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Private equity climate investors based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 157 HQs

6,691Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

645

11-50

278

51-200

201-500

501-1,000

10001+

Verified emails by last verification

0–30

7,682

31–60

531

61–90

90–180

180+

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 climate investors, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 climate investors”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among private equity climate investors, 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 an evidence 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, 8,297 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 5, 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 climate investors by metro

Frequently asked

How many private equity climate investors are there based in the United States?

RevenueBase identified 987 private equity climate investors 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?

Carrier, headquartered in Palm Beach Gardens, tops this list with the largest team on record.

Which city has the most private equity climate investors?

New York leads with 157 headquartered companies, followed by San Francisco (62) and Houston (52).

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 8,297 verified decision-maker contacts tracked across these 987 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 5, 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 SmartSearch, 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.