Company lists · Data refreshed November 2026

Top 25 Geothermal contractors based in Denmark

RevenueBase identified 166 company matches for geothermal contractors associated with Denmark as of November 2026 and tracks 2,052 professional contacts across them, including 212 with verified work emails. Copenhagen is the largest hub.

This list covers company matches for geothermal contractors associated with Denmark, 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 November 6, 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 Nov 6, 2026 How this list was built
166Companies
2,052Contacts tracked
212Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest geothermal contractors based in Denmark

Ranked by team size
Top 25 of 166 company matches for geothermal contractors based in Denmark, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchKgs. Lyngby (copenhagen), DenmarkHQ recorded Nov 6, 2026201-500497 contacts →

Exact match

“Founded in 1943, Geo is a market leading engineering consultancy company and contractor, specialised within the fields of geotechnical and environmental engineering (geoteknik og…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchViborg, DenmarkHQ recorded Nov 6, 202651-200143 contacts →

Exact match

“Brøndum Installationer er teknikentreprenør med dygtige og specialuddannede medarbejdere med årelang erfaring i både Danmark og i Grønland.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchSilkeborg, DenmarkHQ recorded Nov 6, 2026201-50095 contacts →

Exact match

“Henning Mortensen a/s har eksisteret siden 1959.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBirkerød, DenmarkHQ recorded Nov 6, 2026201-50094 contacts →

Exact match

“Poul Sejr Nielsen A/S er en af Nordsjællands største energientreprenører.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchHolstebro, DenmarkHQ recorded Nov 6, 202651-20065 contacts →

Exact match

“Dansk Miljø- & Energistyring A/S employs more than 90 experienced staff, many of whom have been with the company for over 20 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchCopenhagen, DenmarkHQ recorded Nov 6, 202651-20061 contacts →

Exact match

“Decarbonising heat - one community at a time.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchEsbjerg N, DenmarkHQ recorded Nov 6, 202651-20060 contacts →

Exact match

“Vi er Østergaard Entreprise A/S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchHerning, DenmarkHQ recorded Nov 6, 202651-20052 contacts →

Exact match

“Vølund Varmeteknik leverer varmetekniske løsninger til forbrugere, landmænd, skoler, institutioner m.m.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchVejle, DenmarkHQ recorded Nov 6, 202651-20052 contacts →

Exact match

“Exodraft Energy er en unik sammenlægning af Dansk Energi Service og Innoterm, hvor vi har mere end 40 års erfaring med at designe, installere og servicere større energitekniske…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchIkast, DenmarkHQ recorded Nov 6, 202651-20048 contacts →

Exact match

“Klimadan producerer og installerer kundetilpassede varmepumpeløsninger, af høj kvalitet, til både private, erhverv samt landbrug.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchOdense Sø, DenmarkHQ recorded Nov 6, 202651-20038 contacts →

Exact match

“Dansk Installations Teknik har over 30 års erfaring inden for VVS, Ventilation, El og Blik.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchRødovre, DenmarkHQ recorded Nov 6, 202651-20035 contacts →

Exact match

“DEMSKOV-EL & Demskov Grøn er en autoriseret el-installatør.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchHolte, DenmarkHQ recorded Nov 6, 202651-20032 contacts →

Exact match

“WellPerform provides professional services within geothermal energy, CCS and upstream oil & gas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchCopenhagen, DenmarkHQ recorded Nov 6, 202611-5029 contacts →

Exact match

“Green Therma develops next-generation geothermal solutions for district heating and industrial applications, delivering reliable, renewable heat from deep beneath the Earth's…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchHolstebro, DenmarkHQ recorded Nov 6, 202611-5029 contacts →

Exact match

“Ostermark Grouting is a global leader in onshore and offshore grouting solutions for wind energy, oil & gas, and civil infrastructure projects.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchVesthimmerlands, DenmarkHQ recorded Nov 6, 202611-5025 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchHaderslev, DenmarkHQ recorded Nov 6, 202651-20020 contacts →

Exact match

“Vi udfører alle former for jordarbejde, forsyningsledninger, byggemodning, styrbar boringer og meget mere i hele region Syddanmark.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchHerning, DenmarkHQ recorded Nov 6, 202651-20019 contacts →

Exact match

“Gunnar Kristensen VVS blev etableret i 1936, og ejes i dag af Jan Iversen, Bjarne V.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchRødovre, DenmarkHQ recorded Nov 6, 202651-20017 contacts →

Exact match

“Vi er en moderne VVS-virksomhed, som vægter faglige kvalifikationer højt, fordi vi vil være Danmarksmestre i boligrenovering.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchRønne, DenmarkHQ recorded Nov 6, 202651-20017 contacts →

Exact match

“ISO9001 certificeret, vi udfører alt inden for teknik.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchAars, DenmarkHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“Thanks for stopping by.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchTarm, DenmarkHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“Varmepumper, serviceaftaler, biobrændsel, gaskedler, lagertanke, varmtvandsbeholdere, radiatorer, elkedler HS Tarm A/S fører en række produkter, som - ved at udnytte kilder til…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchRingkøbing, DenmarkHQ recorded Nov 6, 202611-5010 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchHøjslev, DenmarkHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“PC Brøndboring A/S blev grundlagt i Højslev Kirkeby i 1898.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchStenløse, DenmarkHQ recorded Nov 6, 202611-509 contacts →

Exact match

“Siden 1968 har Sternberg VVS & Gasteknik A/S hjulpet virksomheder og private med at finde den rigtige løsning inden for VVS, gas, el og energi.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 166 geothermal contractors based in Denmark

See the full list, filter by size, metro and specialty, and access 212 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Geothermal contractors based in Denmark at a glance

As of Nov 6, 2026
10.3%Verified-email coverage
12.4Average contacts per company
11-50Median size (employees)
2.4%Largest-city concentration · Copenhagen
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
78
11-50
61
51-200
23
201-500
3

Email recency for this list is measured worldwide rather than for Denmark, so it is reported there. Company counts and contact totals on this page are exact for Denmark, over 166 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 Denmark whose business descriptions match “geothermal contractors” 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 212 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 November 6, 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 “geothermal contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal contractors are there based in Denmark?

RevenueBase identified 166 company matches for geothermal contractors associated with Denmark as of November 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?

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

Which city has the most geothermal contractors?

Copenhagen leads with 4 company records, followed by Frederiksberg (3) and Herning (3).

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 212 professional contacts with verified work emails tracked across these 166 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 November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 166 geothermal contractors based in Denmark. 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.