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Daldrup & Söhne AG

Ascheberg, North Rhine-Westphalia, Germany

GeothermalOtherPublic company
Founded 1946501-1000 employees
Profile last updated: May 10, 2026

About

Founded in 1946, Daldrup & Söhne AG is a public company headquartered in Ascheberg, Germany with approximately 501-1000 employees specializing in Geothermal, Other.

Daldrup & Söhne AG is a leading specialized provider of drilling and environmental services in Germany and Central Europe. Founded in 1946 in Ascheberg, the company has grown into a publicly traded enterprise (IPO 2007) operating in attractive growth markets. The group operates in four main business divisions: Geothermal Energy (including near-surface and deep geothermal drilling up to 6,000 meters), Water Extraction (drinking, mineral, and thermal water wells), Raw Materials & Exploration (oil, gas, and mineral deposit drilling), and Environment, Development & Services (contaminated site remediation, gas extraction, and water purification). The company maintains a fleet of over 30 drilling rigs, including five high-tech deep drilling systems, and serves customers ranging from public utilities and municipalities to industrial companies and private investors across Central Europe, particularly in the DACH region and Benelux countries. Daldrup is the market leader for deep geothermal drilling in Continental Europe with a track record of over 60 deep wells, supported by specialized expertise combining foundation engineering with deep drilling technology.

Headquarters

Ascheberg, Germany

Founded

1946

Employees

501-1000

Company type

Public company

Focus areas

geothermal drillingdeep wellsrenewable energyheat transitionenvironmental serviceswater extractiondeep geothermal

Products & services

Business models

B2BEPC

Value chain

EngineeringConstructionO&MConsulting

Service areas (4)

  • Geothermal Energy

    Drilling services for near-surface and deep geothermal energy, from 400 meters to 6,000 meters depth, for heating networks, process heat, space heating and cooling

  • Water Extraction

    Well construction for drinking water, service water, mineral water, medicinal water, and thermal brine extraction

  • Raw Materials & Exploration

    Drilling services for exploration and development of mineral, oil and gas deposits, and support for government clients in safe storage site exploration

  • Environment, Development & Services

    Environmental engineering services including hydraulic remediation of contaminated sites, gas extraction wells for landfill and mine gas recovery, groundwater monitoring, and water purification systems

Locations

Headquarters

Lüdinghauser Str. 42-46, 59387, Ascheberg, North Rhine-Westphalia, Germany

Operating locations (4)

  • Bajuwarenring 17a, Oberhaching, Bavaria, Germany
  • Stationsstrasse 90, Rothenburg, Switzerland
  • Burgemeester Bosmastraat 39, Winterswijk, Netherlands
  • Veilingweg 25, Honselersdijk, Netherlands

Service regions

GermanyNetherlandsSwitzerlandBelgiumLuxembourg

Projects

9

Tiefstack Hamburg

Under ConstructionDeep geothermal heat storage

Aquifer storage project for seasonal heat storage in natural underground reservoirs to supply heat to Hamburg population and industry

Hamburg, GermanyCompleted: 2023-Q1

Bleiswijk Geothermal Doublet

OperationalDeep geothermal doublet

Deep geothermal doublet for heat extraction

2.5 MW capacityBleiswijk, NetherlandsCompleted: 2007-07

Nass Outdoor Swimming Pool Arnsberg

OperationalDeep geothermal probe

Deep geothermal probe installation for heating outdoor swimming pool

Arnsberg, Germany

Munich District Heating

OperationalGeothermal doublet

Geothermal drilling project supplying renewable heat to 80,000 Munich residents

Munich, GermanyCompleted: 2021

Unterföhring Geothermal Project

OperationalHydrothermale doublet

Hydrothermale doublet for municipal geothermal heat supply

Unterföhring, GermanyCompleted: 2013

Geretsried Geothermal Project

OperationalDeep geothermal research drilling

Deep geothermal drilling project exceeding 5,000 meters depth with research component

Geretsried, Germany

Nagra Deep Borehole Project

Under ConstructionResearch and exploratory drilling

Exploratory deep boreholes for Swiss radioactive waste storage site selection, up to 2,000 meters depth

Bülach, Switzerland

Poing-Pliening Geothermal Plant

OperationalDeep geothermal plant

Deep geothermal facility with microseismic monitoring

Poing-Pliening, Germany

Prenzlau Geothermal Doublet

OperationalDeep geothermal doublet

Deep geothermal doublet project

Prenzlau, Germany

Credentials & affiliations

Industry memberships

Bundesverband Geothermie

Partnerships

Munich Re, Exorka, Marsh

People

Management & team (7)

+ 3 more

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