Company lists · Data refreshed September 2026

Top 25 Geothermal energy investment firms based in Germany

Name: Geothermal energy investment firms based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 119 companies tracked

RevenueBase identified 119 geothermal energy investment firms headquartered in Germany as of September 2026 and tracks 1,476 professional contacts across them, including 715 with verified work emails. Berlin is the largest hub.

This list covers geothermal energy investment firms headquartered in Germany, 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 28, 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 28, 2026 86% judged on-target in blind review

119Companies

1,476Contacts tracked

715Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest geothermal energy investment firms based in Germany

Ranked by team size

Top 25 of 119 geothermal energy investment firms based in Germany, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal energy investment firms: 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	Q Energy	Partial evidence	Berlin, GermanyHQ checked Sep 28, 2026	201-500	565 contacts →
	Partial evidence “Q ENERGY is Europe’s 360° green energy company.” Source: RevenueBase Database · checked Sep 28, 2026
2	Onyx Power	Partial evidence	Berlin, GermanyHQ checked Sep 28, 2026	201-500	146 contacts →
	Partial evidence “We are energy experts and are committed to Europe's energy transition.” Source: RevenueBase Database · checked Sep 28, 2026
3	Baugrund SÜD Gesellschaft FÜR Geothermie MBH	Partial evidence	Bad Wurzach, GermanyHQ checked Sep 28, 2026	51-200	50 contacts →
	Partial evidence “BauGrund Süd Gesellschaft für Geothermie mbH is an utilities company based out of MAYBACHSTRASSE 5, Bad Wurzach, Germany.” Source: RevenueBase Database · checked Sep 28, 2026
4	Saxovent	Partial evidence	Berlin, GermanyHQ checked Sep 28, 2026	51-200	49 contacts →
	Partial evidence “Saxovent is a Berlin-based developer of projects in the fields of renewable energy, real estate and agriculture, with a track record of over twenty years of success.” Source: RevenueBase Database · checked Sep 28, 2026
5	Green Energy 3000	Partial evidence	Leipzig, GermanyHQ checked Sep 28, 2026	51-200	44 contacts →
	Partial evidence “This channel represents the entire Green Energy company group: is the umbrella organisation for the subsidiaries, and.” Source: RevenueBase Database · checked Sep 28, 2026
6	AREAM	Strong evidence	Düsseldorf, GermanyHQ checked Sep 28, 2026	51-200	39 contacts →
	Strong evidence “The aream Group is a fully integrated investment and asset manager for institutional investors focusing on sustainable infrastructure in the renewable energy sector, including…” Source: RevenueBase Database · checked Sep 28, 2026
7	Reconcept Group	Strong evidence	Hamburg, GermanyHQ checked Sep 28, 2026	11-50	34 contacts →
	Strong evidence “The reconcept Group is a project developer of renewable energies as well as a provider and asset manager of sustainable investments.” Source: RevenueBase Database · checked Sep 28, 2026
8	Daldrup & Söhne AG	Indirect evidence	Ascheberg, GermanyHQ checked Sep 28, 2026	51-200	28 contacts →
	Indirect evidence “Die Daldrup & Söhne AG ist Spezialist für Bohrtechnik und die Erschließung geologischer Ressourcen in Deutschland mit Sitz in Ascheberg, Nordrhein-Westfalen.” Source: RevenueBase Database · checked Sep 28, 2026
9	Ökorenta Gruppe	Partial evidence	Aurich, GermanyHQ checked Sep 28, 2026	51-200	21 contacts →
	Partial evidence “Seit widmet sich die ÖKORENTA Gruppe dem Ziel, nachhaltige Stromerzeugung als Anlagesegment so renditestark und zuverlässig wie möglich zu gestalten und dabei die Energiewende…” Source: RevenueBase Database · checked Sep 28, 2026
10	Deutsche Erdwärme	Indirect evidence	Karlsruhe, GermanyHQ checked Sep 28, 2026	11-50	21 contacts →
	Indirect evidence “Deutsche ErdWärme entwickelt, baut, finanziert und betreibt Erdwärmeanlagen zur Dekarbonisierung von Wärmenetzen.” Source: RevenueBase Database · checked Sep 28, 2026
11	Geothermie Neubrandenburg Gmbh	Partial evidence	Neubrandenburg, GermanyHQ checked Sep 28, 2026	11-50	21 contacts →
	Partial evidence “Geothermie Neubrandenburg GmbH (GTN) is an internationally active consultancy and planning office of engineers and geoscientsits.” Source: RevenueBase Database · checked Sep 28, 2026
12	Erdwerk Gmbh	Strong evidence	Munich, GermanyHQ checked Sep 28, 2026	11-50	21 contacts →
	Strong evidence “ERDWERK GmbH is an independent planning office offering consulting services in the fields of geothermal energy, geology, hydrogeology, energetics and drilling technology.” Source: RevenueBase Database · checked Sep 28, 2026
13	Luana AG	Partial evidence	Hamburg, GermanyHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “Die Luana AG gehört zur 2008 in Hamburg gegründeten Luana Group und hat ihren Schwerpunkt auf der ökologischen Energieversorgung.” Source: RevenueBase Database · checked Sep 28, 2026
14	Geoenergie Konzept Gmbh	Partial evidence	Freiberg, GermanyHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “eine Gesellschaft der ENGIE-Gruppe, ist ein führendes Unternehmen für Wärme- und Kältelösungen im Bereich der Oberflächennahen Geothermie.” Source: RevenueBase Database · checked Sep 28, 2026
15	Grips Energy	Partial evidence	Berlin, GermanyHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “GRIPS Energy is a renewable energy investor and contractor (IPP/ESCO).” Source: RevenueBase Database · checked Sep 28, 2026
16	E.R. Capital Holding	Indirect evidence	Hamburg, GermanyHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “E.R.” Source: RevenueBase Database · checked Sep 28, 2026
17	Connected Infrastructure Capital	Partial evidence	Hamburg, GermanyHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Connected Infrastructure Capital (CIC) has a strong commercial and technical expertise in the field of renewable energy in Europe.” Source: RevenueBase Database · checked Sep 28, 2026
18	Erdwärme Grünwald Gmbh	Indirect evidence	Grünwald, GermanyHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
19	Neowells	Indirect evidence	Berlin, GermanyHQ checked Sep 28, 2026	1-10	9 contacts →
	Indirect evidence “neowells is a German, independent and innovative engineering company with the vision of actively supporting, professionalizing, industrializing and thus accelerating the heat and…” Source: RevenueBase Database · checked Sep 28, 2026
20	CIC Invest Gmbh	Partial evidence	Regensburg, GermanyHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “CIC Invest ist immer auf der Suche nach genau diesen Ideen, aus denen nachhaltige und renditestarke Investments werden können.” Source: RevenueBase Database · checked Sep 28, 2026
21	Reventon Asset Partners Gmbh	Strong evidence	München, GermanyHQ checked Sep 28, 2026	11-50	8 contacts →
	Strong evidence “reVenton Asset Partners is a german project development and investment company based in Munich, focussing on renewable energy infrastructure, especially Wind and PV assets.” Source: RevenueBase Database · checked Sep 28, 2026
22	Quadoro Gmbh	Partial evidence	Offenbach Am Main, GermanyHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “Quadoro is the Doric Group's real estate and renewable energy expert.” Source: RevenueBase Database · checked Sep 28, 2026
23	Brick Group Gmbh	Partial evidence	Essen, GermanyHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Die Brick Group GmbH ist eine inhabergeführte Beteiligungsgesellschaft, die sich auf die Bau- und Handwerksbranche spezialisiert hat, insbesondere auf energetische Sanierung und…” Source: RevenueBase Database · checked Sep 28, 2026
24	Tewag Technologie	Indirect evidence	Starzach-felldorf, GermanyHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Unabhängige Sachverständige und Planer verbinden Erkenntnisse aus neuester Forschung, wissenschaftliche Methoden und geologische Erfahrung aus jahrzehntelanger Praxis.” Source: RevenueBase Database · checked Sep 28, 2026
25	Kemco Gmbh	Partial evidence	Regensburg, GermanyHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “KEMCO provides drilling management consulting services for Geothermal and Oil and Gas projects.” Source: RevenueBase Database · checked Sep 28, 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 energy investment firms. 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 energy investment firms.
Partial evidence: Its own public description names part of geothermal energy investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geothermal energy investment firms. 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 119 geothermal energy investment firms based in Germany

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 715 reachable decision-makers.

Free signup · no credit card

View the full list →

Geothermal energy investment firms based in Germany at a glance

As of Sep 28, 2026

48.4%Verified-email coverage

12.4Average contacts per company

1-10Median size (employees)

11.8%Largest-city concentration · Berlin

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 119 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 energy investment firms, 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 Germany whose own description of what they do matches “geothermal energy investment firms”. 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 energy investment firms), 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 energy investment firms, and records with no verified work email. Companies headquartered outside Germany 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, 715 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 28, 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 energy investment firms, 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 energy investment firms are there based in Germany?

RevenueBase identified 119 geothermal energy investment firms headquartered in Germany 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?

Q Energy, headquartered in Berlin, tops this list with the largest team on record.

Which city has the most geothermal energy investment firms?

Berlin leads with 14 headquartered companies, followed by Munich (11) and Hamburg (8).

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 715 verified decision-maker contacts tracked across these 119 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 119 geothermal energy investment firms based in Germany. Start with a free account, no credit card.

Download this list →

Related lists

Geothermal energy investment firms by geography

Browse the directory

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.