Company lists · Data refreshed September 2026

Top 25 Geothermal cooperatives based in the United States

Name: Geothermal cooperatives based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 323 companies tracked

RevenueBase identified 323 geothermal cooperatives headquartered in the United States as of September 2026 and tracks 8,244 professional contacts across them, including 4,360 with verified work emails. Houston is the largest hub.

This list covers geothermal cooperatives 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 20, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

323Companies

8,244Contacts tracked

4,360Verified emails

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The 25 largest geothermal cooperatives based in the United States

Ranked by team size

Top 25 of 323 geothermal cooperatives based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal cooperatives: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Calpine	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,112 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
2	Ormat Technologies, INC	Indirect evidence	Reno, NV, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,281 contacts →
	Indirect evidence “With over five decades of experience, Ormat Technologies, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
3	Platte River Power Authority	Indirect evidence	Fort Collins, CO, United StatesHQ checked Sep 20, 2026	201-500	299 contacts →
	Indirect evidence “Platte River Power Authority is a not-for-profit, community-owned public power utility that generates and delivers safe, reliable, environmentally responsible and financially…” Source: RevenueBase Database · checked Sep 20, 2026
4	BHE Renewables	Indirect evidence	Des Moines, IA, United StatesHQ checked Sep 20, 2026	501-1,000	218 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
5	Fervo Energy	Partial evidence	Houston, CA, United StatesHQ checked Sep 20, 2026	51-200	213 contacts →
	Partial evidence “Fervo Energy provides 24/7 carbon-free energy through the development of next-generation geothermal power.” Source: RevenueBase Database · checked Sep 20, 2026
6	smartenergy.com	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	152 contacts →
	Indirect evidence “We believe the future of energy is green and it is our mission to make green energy affordable for everyone.” Source: RevenueBase Database · checked Sep 20, 2026
7	Matanuska Electric Association, INC	Partial evidence	Palmer, AK, United StatesHQ checked Sep 20, 2026	201-500	126 contacts →
	Partial evidence “Founded in 1941, Matanuska Electric Association, Inc.(MEA), is Alaska’s oldest existing and second-largest electric cooperative.” Source: RevenueBase Database · checked Sep 20, 2026
8	Wabash Valley Power Alliance	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 20, 2026	51-200	120 contacts →
	Partial evidence “Wabash Valley Power Alliance (WVPA) is a not-for-profit generation and transmission cooperative created out of the need for reliable, affordable electricity in America's heartland.” Source: RevenueBase Database · checked Sep 20, 2026
9	Dandelion Energy	Partial evidence	Mount Kisco, NY, United StatesHQ checked Sep 20, 2026	51-200	118 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 20, 2026
10	Brightcore Energy	Indirect evidence	Armonk, NY, United StatesHQ checked Sep 20, 2026	51-200	108 contacts →
	Indirect evidence “Brightcore Energy is a leading renewable energy solutions provider serving commercial, institutional, and government clients.” Source: RevenueBase Database · checked Sep 20, 2026
11	NCPA	Indirect evidence	Roseville, CA, United StatesHQ checked Sep 20, 2026	51-200	103 contacts →
	Indirect evidence “The Northern California Power Agency (NCPA), a California Joint Action Agency, was established in 1968 by a consortium of locally owned electric utilities to make joint…” Source: RevenueBase Database · checked Sep 20, 2026
12	Clean Power Alliance	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 20, 2026	51-200	101 contacts →
	Indirect evidence “We believe in a clean energy future that is local, where communities are empowered and customers are given a choice about the source of their energy.” Source: RevenueBase Database · checked Sep 20, 2026
13	Delaware Electric Cooperative, INC	Partial evidence	Greenwood, DE, United StatesHQ checked Sep 20, 2026	51-200	80 contacts →
	Partial evidence “Delaware Electric Cooperative (DEC) is the only not-for-profit electric cooperative in the State of Delaware.” Source: RevenueBase Database · checked Sep 20, 2026
14	Valley Electric Association, INC	Partial evidence	Pahrump, NV, United StatesHQ checked Sep 20, 2026	51-200	80 contacts →
	Partial evidence “Valley Electric Association (VEA) is a member-owned electricity/communications cooperative headquartered in Pahrump.” Source: RevenueBase Database · checked Sep 20, 2026
15	Cyrq Energy	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 20, 2026	51-200	69 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
16	Cuivre River Electric Cooperative	Partial evidence	Troy, MO, United StatesHQ checked Sep 20, 2026	51-200	67 contacts →
	Partial evidence “Cuivre River Electric Cooperative (CREC) is headquartered in Troy, Missouri, with a branch office in Lake Saint Louis, Missouri.” Source: RevenueBase Database · checked Sep 20, 2026
17	Quaise Energy	Partial evidence	Houston, MA, United StatesHQ checked Sep 20, 2026	51-200	62 contacts →
	Partial evidence “Quaise develops superhot geothermal power plants for a terawatt-scale world.” Source: RevenueBase Database · checked Sep 20, 2026
18	Cloverland Electric Cooperative	Partial evidence	Dafter, MI, United StatesHQ checked Sep 20, 2026	51-200	58 contacts →
	Partial evidence “Cloverland Electric Cooperative is a not-for-profit, member-owned utility focused on delivering exceptional services through the generation and safe delivery of reliable and…” Source: RevenueBase Database · checked Sep 20, 2026
19	Homeworks Tri-County Electric Cooperative	Partial evidence	Portland, MI, United StatesHQ checked Sep 20, 2026	51-200	58 contacts →
	Partial evidence “At HomeWorks Tri-County Electric Cooperative, we constantly seek to bring energy, comfort, and communication solutions to our member-owners and customers, to enhance their quality…” Source: RevenueBase Database · checked Sep 20, 2026
20	SAN Miguel Electric Cooperative, INC	Partial evidence	Jourdanton, TX, United StatesHQ checked Sep 20, 2026	51-200	57 contacts →
	Partial evidence “San Miguel Electric Cooperative, Inc.(San Miguel) was created on February 17, 1977, under the Rural Electric Cooperative Act of the State of Texas, for the purpose of owning and…” Source: RevenueBase Database · checked Sep 20, 2026
21	Consolidated Cooperative	Partial evidence	Mount Gilead, OH, United StatesHQ checked Sep 20, 2026	51-200	54 contacts →
	Partial evidence “Consolidated Cooperative, Inc, is an energy and communications company that provides services that make life better for its members.” Source: RevenueBase Database · checked Sep 20, 2026
22	Allied Well Drilling	Indirect evidence	Laurel, MD, United StatesHQ checked Sep 20, 2026	51-200	52 contacts →
	Indirect evidence “We at Allied Well Drilling are a full service commercial and residential gethermal heating/cooling system installer, specializing in vertically drilled closed loop systems.” Source: RevenueBase Database · checked Sep 20, 2026
23	Corn Belt Power Cooperative	Partial evidence	Humboldt, IA, United StatesHQ checked Sep 20, 2026	51-200	49 contacts →
	Partial evidence “Corn Belt Power Cooperative is a Touchstone Energy cooperative.” Source: RevenueBase Database · checked Sep 20, 2026
24	Arizona Electric Power Cooperative, Inc. Aepco	Partial evidence	Benson, AZ, United StatesHQ checked Sep 20, 2026	51-200	44 contacts →
	Partial evidence “Arizona Electric Power Cooperative, Inc.(AEPCO) is one of two electric cooperatives that are part of Arizona G&T Cooperatives.” Source: RevenueBase Database · checked Sep 20, 2026
25	Groundswell, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	42 contacts →
	Indirect evidence “Groundswell builds community power to strengthen local resilience for everyone and cut electricity bills in half for our neighbors who need savings the most.” Source: RevenueBase Database · checked Sep 20, 2026

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: geothermal cooperatives. 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 geothermal cooperatives.
Partial evidence: Its own public description names part of geothermal cooperatives, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geothermal cooperatives. 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 323 geothermal cooperatives based in the United States

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Geothermal cooperatives based in the United States at a glance

As of Sep 20, 2026

52.9%Verified-email coverage

25.5Average contacts per company

11-50Median size (employees)

3.4%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

149

11-50

113

51-200

201-500

501-1,000

1,001-5,000

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 323 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 geothermal cooperatives, 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 “geothermal cooperatives”. 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 geothermal cooperatives), 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 geothermal cooperatives, 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, 4,360 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 20, 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.

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 geothermal cooperatives, 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 geothermal cooperatives are there based in the United States?

RevenueBase identified 323 geothermal cooperatives 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?

Calpine, headquartered in Houston, tops this list with the largest team on record.

Which city has the most geothermal cooperatives?

Houston leads with 11 headquartered companies, followed by Austin (7) and Reno (6).

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 4,360 verified decision-maker contacts tracked across these 323 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 20, 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 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.