Company lists · Data refreshed September 2026

Top 25 Renewable energy venture capital firms based in the United States

Name: Renewable energy venture capital 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 5, 2026 668 companies tracked

RevenueBase identified 668 renewable energy venture capital firms headquartered in the United States as of September 2026 and tracks 7,511 professional contacts across them, including 3,178 with verified work emails and 2,874 with mobile numbers. New York is the largest hub.

This list covers renewable energy venture capital 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, 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

668Companies

7,511Contacts tracked

3,178Verified emails

2,874Mobile numbers

Explore all 668 companies → Free signup · no credit card · 500 free credits

The 25 largest renewable energy venture capital firms based in the United States

Ranked by team size

Top 25 of 668 renewable energy venture capital firms 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 renewable energy venture capital firms: 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	Atlas Renewable EnergyStrong evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	201-500	500
	“Atlas Renewable Energy delivers clean energy at scale.” Source: company website · checked Sep 5, 2026
2	Enfinity GlobalIndirect evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	201-500	428
	Source: company website · checked Sep 5, 2026
3	Longroad EnergyPartial evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	51-200	210
	“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.” Source: company website · checked Sep 5, 2026
4	HASIPartial 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
5	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
6	Breakthrough EnergyPartial 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
7	GreenbackerStrong 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
8	NEW Energy NexusPartial evidence	Berkeley, CA, United StatesHQ checked Sep 5, 2026	51-200	136
	“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…” Source: company website · checked Sep 5, 2026
9	CleancapitalIndirect 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
10	NGPPartial evidence	Dallas, TX, United StatesHQ checked Sep 5, 2026	51-200	72
	“It is undeniable that energy is an essential part of modern life.” Source: company website · checked Sep 5, 2026
11	Renewable PropertiesStrong evidence	San Francisco, United StatesHQ checked Sep 5, 2026	11-50	68
	“Renewable Properties specializes in developing and investing in small-scale utility and commercial solar energy projects throughout the United States.” Source: company website · checked Sep 5, 2026
12	Elemental ImpactIndirect evidence	Honolulu, HI, United StatesHQ checked Sep 5, 2026	51-200	62
	“Elemental Impact is a nonprofit investing platform with 15 years of experience advancing innovative technology that creates lasting economic and climate benefits across…” Source: company website · checked Sep 5, 2026
13	Joule EnergyPartial evidence	New Orleans, LA, United StatesHQ checked Sep 5, 2026	51-200	62
	“Joule Energy, a Louisiana owned and operated company, was founded on the principle that investing in energy innovation can be as beneficial to the bottom-line as it is to the…” Source: company website · checked Sep 5, 2026
14	True Green Capital Management LLCStrong evidence	Westport, CT, United StatesHQ checked Sep 5, 2026	11-50	59
	“True Green Capital Management LLC (“TGC”) is a specialized renewable energy infrastructure fund manager with a focus in distributed power generation in the US and Europe.” Source: company website · checked Sep 5, 2026
15	IOWNStrong evidence	La Jolla, CA, United StatesHQ checked Sep 5, 2026	51-200	55
	“We want to facilitate the transition from fossil fuels to clean, renewable energy.” Source: company website · checked Sep 5, 2026
16	Encore Renewable EnergyStrong evidence	Burlington, VT, United StatesHQ checked Sep 5, 2026	11-50	54
	“We are a leader in full-service community-scale renewable energy development, with a proven track record in project development from concept to completion.” Source: company website · checked Sep 5, 2026
17	Clean Energy VenturesStrong evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	11-50	54
	“Clean Energy Ventures is a venture capital firm focused on investing in companies commercializing disruptive advanced energy technologies and business model innovations that can…” Source: company website · checked Sep 5, 2026
18	Tokyo GAS America LTDIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	52
	Source: company website · checked Sep 5, 2026
19	VerogyStrong evidence	West Hartford, CT, United StatesHQ checked Sep 5, 2026	51-200	51
	“Verogy is a renewable energy team with decades of experience in the solar industry.” Source: company website · checked Sep 5, 2026
20	Tron SolarPartial evidence	Vernon Hills, IL, United StatesHQ checked Sep 5, 2026	51-200	49
	“Tron Solar is a clean energy company dedicated to make the world we live in, livable for our future generations.” Source: company website · checked Sep 5, 2026
21	SunwealthPartial evidence	Cambridge, MA, United StatesHQ checked Sep 5, 2026	11-50	47
	“Sunwealth’s mission is to invest in the future of energy, generating financial, social and environmental returns for investors and communities.” Source: company website · checked Sep 5, 2026
22	Stellar Renewable PowerStrong evidence	Dallas, TX, United StatesHQ checked Sep 5, 2026	11-50	46
	“Backed by KKR, Stellar Renewable Power is a solar and storage development and operating company offering holistic energy solutions.” Source: company website · checked Sep 5, 2026
23	Triple OAK PowerPartial evidence	Portland, OR, United StatesHQ checked Sep 5, 2026	11-50	45
	“At Triple Oak Power, our mission is to develop sustainable energy plants.” Source: company website · checked Sep 5, 2026
24	TelyonStrong evidence	Old Saybrook, CT, United StatesHQ checked Sep 5, 2026	11-50	44
	“Telyon is a turn-key renewable energy development firm specializing in the commercial and industrial solar energy sector.” Source: company website · checked Sep 5, 2026
25	Valta EnergyIndirect evidence	Dana Point, CA, United StatesHQ checked Sep 5, 2026	11-50	42
	“Founded in 2009, Valta Inc.” Source: company website · checked Sep 5, 2026

Showing 25 of 668 renewable energy venture capital firms based in the United States

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Renewable energy venture capital firms based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 64 HQs

2,874Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

415

11-50

191

51-200

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

2,984

31–60

181

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 renewable energy venture capital firms, 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 “renewable energy venture capital firms”. 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 renewable energy venture capital 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 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, 3,178 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.

Renewable energy venture capital firms by metro

Frequently asked

How many renewable energy venture capital firms are there based in the United States?

RevenueBase identified 668 renewable energy venture capital 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?

Atlas Renewable Energy, headquartered in Miami, tops this list with the largest team on record.

Which city has the most renewable energy venture capital firms?

New York leads with 64 headquartered companies, followed by Houston (34) and San Francisco (34).

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 3,178 verified decision-maker contacts tracked across these 668 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.