Company lists · Data refreshed September 2026

Top 25 Clean energy investment firms based in the United States

RevenueBase identified 1,235 company matches for clean energy investment firms associated with the United States as of September 2026 and tracks 18,524 professional contacts across them, including 7,774 with verified work emails. New York is the largest hub.

This list covers company matches for clean energy investment firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 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 RevenueBase SmartSearch · Exact Recorded Sep 27, 2026 How this list was built
1,235Companies
18,524Contacts tracked
7,774Verified emails
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The 25 largest clean energy investment firms based in the United States

Ranked by team size
Top 25 of 1,235 company matches for clean energy investment firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Diego, United StatesHQ recorded Sep 27, 2026n/a1,199 contacts →

Exact match

“The Powur Mission: Accelerate the adoption of clean energy worldwide We're empowering our community of homeowners and advisors to thrive in the global shift to sustainable energy.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2Exact matchCharlottesville, VA, United StatesHQ recorded Sep 27, 2026201-500594 contacts →

Exact match

“Apex Clean Energy was founded with a singular focus: to accelerate the shift to clean energy.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchCharlotte, NC, United StatesHQ recorded Sep 27, 2026201-500539 contacts →

Exact match

“Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchMiami, FL, United StatesHQ recorded Sep 27, 2026201-500500 contacts →

Exact match

“Atlas Renewable Energy delivers clean energy at scale.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchMiami, FL, United StatesHQ recorded Sep 27, 2026201-500428 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchScottsdale, AZ, United StatesHQ recorded Sep 27, 2026201-500316 contacts →

Exact match

“Arevon is a U.S.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchValhalla, NY, United StatesHQ recorded Sep 27, 2026201-500304 contacts →

Exact match

“Who We Are Con Edison Development develops, owns and operates renewable and energy infrastructure projects.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchCarlsbad, CA, United StatesHQ recorded Sep 27, 2026201-500244 contacts →

Exact match

“rethinkenergy BayWa r.e is a leading global renewable energy company committed to delivering best-in-class projects, services and solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchDes Moines, IA, United StatesHQ recorded Sep 27, 2026501-1,000218 contacts →

Exact match

“BHE Renewables delivers sustainable energy solutions for customers and communities by producing renewable energy for both the wholesale market and for customers under long-term…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchBoston, MA, United StatesHQ recorded Sep 27, 202651-200210 contacts →

Exact match

“Founded in 2016, Longroad Energy is a U.S-based energy company focused on developing and operating wind, solar, storage, and data center projects throughout North America.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchLowell, MA, United StatesHQ recorded Sep 27, 202651-200209 contacts →

Exact match

“New Leaf Energy is one of the leading developers of renewable energy and energy storage projects in the United States-both distributed generation and utility scale.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchAnnapolis, MD, United StatesHQ recorded Sep 27, 202651-200196 contacts →

Exact match

“HASI invests in sustainable infrastructure assets advancing the energy transition.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchWashington, DC, United StatesHQ recorded Sep 27, 202651-200189 contacts →

Exact match

“Sol Systems is a national clean energy firm focused on building domestic energy that benefits local communities.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchHouston, TX, United StatesHQ recorded Sep 27, 202651-200173 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchSilver Spring, MD, United StatesHQ recorded Sep 27, 202651-200167 contacts →

Exact match

“Competitive Power Ventures (CPV) has 25 years of unprecedented success in the development and operation of highly efficient and low emitting electric generation and renewable…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16Exact matchChicago, IL, United StatesHQ recorded Sep 27, 202651-200163 contacts →

Exact match

“Marathon Capital is the largest independent investment bank dedicated to servicing the clean economy.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchKirkland, United StatesHQ recorded Sep 27, 202651-200159 contacts →

Exact match

“Breakthrough Energy backs companies developing the next generation of clean energy solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchWashington, DC, United StatesHQ recorded Sep 27, 202651-200155 contacts →

Exact match

“CleanChoice Energy is a cleantech company that empowers people and businesses to easily access climate solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchNew York, United StatesHQ recorded Sep 27, 202651-200153 contacts →

Exact match

“REV Renewables, an LS Power company, is an industry leader in the development, acquisition and operation of renewables and energy storage.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20Exact matchNew York, NY, United StatesHQ recorded Sep 27, 202651-200150 contacts →

Exact match

“Madison Energy Infrastructure is on a mission to modernize energy for industry and communities where it matters most.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchNew York, NY, United StatesHQ recorded Sep 27, 202651-200141 contacts →

Exact match

“As a multi-strategy investment manager and independent power producer, Greenbacker Renewable Energy Company (Greenbacker) is empowering a sustainable world by connecting…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchBerkeley, CA, United StatesHQ recorded Sep 27, 202651-200136 contacts →

Exact match

“New Energy Nexus (NEX) is the world's leading ecosystem of funds and accelerators supporting diverse clean energy entrepreneurs to thrive, from emerging tech through to clean…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchMarlborough, MA, United StatesHQ recorded Sep 27, 202651-200131 contacts →

Exact match

“ConnectM is a clean energy technology and solutions provider for residential and light commercial buildings and all-electric original equipment manufacturers with a proprietary…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24Exact matchBoston, MA, United StatesHQ recorded Sep 27, 202651-200125 contacts →

Exact match

“BlueWave is a mission-driven clean energy developer, owner, and operator building solar and energy storage solutions that strengthen the electric grid and deliver long-term grid…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchAtlanta, GA, United StatesHQ recorded Sep 27, 202651-200124 contacts →

Exact match

“Dimension Energy is making clean energy work for everyone.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 25 of 1,235 clean energy investment firms based in the United States

See the full list, filter by size, metro and specialty, and access 7,774 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Clean energy investment firms based in the United States at a glance

As of Sep 27, 2026
42.0%Verified-email coverage
15.0Average contacts per company
1-10Median size (employees)
11.8%Largest-city concentration · New York
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
723
11-50
369
51-200
103
201-500
19
501-1,000
11
1,001-5,000
4
5,001-10,000
1
10001+
3

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 1,235 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United States whose business descriptions match “clean energy investment firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 7,774 professional contacts with verified work emails across the full matched dataset. 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 27, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “clean energy investment firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clean energy investment firms are there based in the United States?

RevenueBase identified 1,235 company matches for clean energy investment firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Powur, PBC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most clean energy investment firms?

New York leads with 146 company records, followed by Houston (70) and San Francisco (59).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 7,774 professional contacts with verified work emails tracked across these 1,235 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,235 clean energy investment firms based in the United States. Start with a free account, no credit card.

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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.