Company lists · Data refreshed October 2026

Top 25 Geothermal energy investment companies based in the United States

RevenueBase identified 272 company matches for geothermal energy investment companies associated with the United States as of October 2026 and tracks 7,366 professional contacts across them, including 3,461 with verified work emails. Houston is the largest hub.

This list covers company matches for geothermal energy investment companies 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 October 13, 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 Oct 13, 2026 How this list was built
272Companies
7,366Contacts tracked
3,461Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest geothermal energy investment companies based in the United States

Ranked by team size
Top 25 of 272 company matches for geothermal energy investment companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 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 matchHouston, TX, United StatesHQ recorded Oct 13, 20261,001-5,0002,110 contacts →

Exact match

“A business unit of Constellation (NASDAQ: CEG), Calpine Corporation is America’s largest generator of electricity from natural gas and geothermal resources with operations in…”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2Exact matchReno, NV, United StatesHQ recorded Oct 13, 20261,001-5,0001,298 contacts →

Exact match

“With over five decades of experience, Ormat Technologies, Inc.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3Exact matchMiami, FL, United StatesHQ recorded Oct 13, 2026201-500452 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4Exact matchValhalla, NY, United StatesHQ recorded Oct 13, 2026201-500307 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
5Exact matchHouston, CA, United StatesHQ recorded Oct 13, 202651-200270 contacts →

Exact match

“Fervo Energy provides 24/7 carbon-free energy through the development of next-generation geothermal power.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6Exact matchBoston, MA, United StatesHQ recorded Oct 13, 202651-200227 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 · Oct 13, 2026 · View company records in RevenueBase
7Exact matchMount Kisco, NY, United StatesHQ recorded Oct 13, 202651-200130 contacts →

Exact match

“Dandelion Energy is the nation’s leading residential geothermal provider, on a mission to make the world’s most efficient heating and cooling technology accessible to everyone.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8Exact matchNew York, NY, United StatesHQ recorded Oct 13, 202651-200129 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 · Oct 13, 2026 · View company records in RevenueBase
9Exact matchSalt Lake City, UT, United StatesHQ recorded Oct 13, 202651-200105 contacts →

Exact match

“Powering the future with the Earth’s hidden heat.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10Exact matchArmonk, NY, United StatesHQ recorded Oct 13, 202651-200103 contacts →

Exact match

“Brightcore Energy is a leading renewable energy solutions provider serving commercial, institutional, and government clients.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11Exact matchRocklin, CA, United StatesHQ recorded Oct 13, 2026501-1,00084 contacts →

Exact match

“Founded in 2022, MARS Energy Group (“MARS”) is a holding company pioneering energy infrastructure.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12Exact matchGreenville, IL, United StatesHQ recorded Oct 13, 202651-20076 contacts →

Exact match

“Enertech Global is a leading manufacturer and visionary in the geothermal heating and cooling industry.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13Exact matchHouston, MA, United StatesHQ recorded Oct 13, 202651-20066 contacts →

Exact match

“Quaise develops superhot geothermal power plants for a terawatt-scale world.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14Exact matchSalt Lake City, UT, United StatesHQ recorded Oct 13, 202651-20063 contacts →

Exact match

“With over a decade of experience in the development of clean, efficient renewable energy facilities, Cyrq owns, operates and develops geothermal and solar energy-based power…”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15Exact matchNew Brighton, MN, United StatesHQ recorded Oct 13, 202611-5052 contacts →

Exact match

“Darcy Solutions is on a mission to put Geothermal Everywhere.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16Exact matchHouston, TX, United StatesHQ recorded Oct 13, 202611-5048 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Oct 13, 202611-5043 contacts →

Exact match

“Renewa is a renewables company focused on acquisitions and investments within the solar, wind and renewable energy industries.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18Exact matchHouston, TX, United StatesHQ recorded Oct 13, 2026n/a37 contacts →

Exact match

“GEC invests in innovative energy technology and software companies.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19Exact matchSacramento, CA, United StatesHQ recorded Oct 13, 202651-20035 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20Exact matchChicago, IL, United StatesHQ recorded Oct 13, 202611-5035 contacts →

Exact match

“Our vision is to provide clean, reliable power to international markets, to meet rapidly rising demand through efficient, locally appropriate technologies.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21Exact matchPalo Alto, CA, United StatesHQ recorded Oct 13, 202611-5033 contacts →

Exact match

“XGS Energy is a geothermal energy company founded and headquartered in Palo Alto, CA.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22Exact matchSomerville, MA, United StatesHQ recorded Oct 13, 202611-5033 contacts →

Exact match

“Eden is a leader in sustainable natural resource recovery.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23Exact matchPalm Springs, CA, United StatesHQ recorded Oct 13, 20261-1030 contacts →

Exact match

“Geothermal Rising (GR) is the largest and oldest geothermal membership organization in the world.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24Exact matchBend, OR, United StatesHQ recorded Oct 13, 202611-5028 contacts →

Exact match

“NewSun Energy is a renewable energy development and investment company that specializes in electric power grid interconnection and transmission in the Pacific Northwest.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25Exact matchGrand Rapids, MI, United StatesHQ recorded Oct 13, 202611-5028 contacts →

Exact match

“Geothermal Systems are becoming a critical component in the effort to make buildings more environmentally friendly.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase

Showing 25 of 272 geothermal energy investment companies based in the United States

See the full list, filter by size, metro and specialty, and access 3,461 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Geothermal energy investment companies based in the United States at a glance

As of Oct 13, 2026
47.0%Verified-email coverage
27.1Average contacts per company
11-50Median size (employees)
10.7%Largest-city concentration · Houston
Oct 13, 2026Page data refreshed

Companies by employee count

1-10
132
11-50
111
51-200
20
201-500
4
501-1,000
2
1,001-5,000
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 272 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 “geothermal energy investment companies” 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 3,461 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 October 13, 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.

Geothermal energy investment companies by metro

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 “geothermal energy investment companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal energy investment companies are there based in the United States?

RevenueBase identified 272 company matches for geothermal energy investment companies associated with the United States as of October 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?

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

Which city has the most geothermal energy investment companies?

Houston leads with 29 company records, followed by New York (11) and Dallas (7).

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 3,461 professional contacts with verified work emails tracked across these 272 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 October 13, 2026.

Ready to reach these companies? Verified emails and direct dials for all 272 geothermal energy investment companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

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.