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The 30 largest energy companies in Hesse

Tamtam tracks 30 energy companies headquartered in Hesse. This list ranks all of them by number of employees on LinkedIn, led by Bosch Home Comfort Group, Viessmann Climate Solutions and SGL Carbon. Their median headcount is 578. Half of them were founded in 1996 or later. The most common headquarters are Frankfurt (11), Wiesbaden (3) and Kassel (2).

🇩🇪 Hesse30 companiesUpdated Nov 2, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Bosch Home Comfort Groupbosch-homecomfortgroup.com

The company specializes in creating innovative sustainable heating, cooling, and well-being solutions to enhance lifestyles for a smarter future

Renewable Energy Semiconductor Manufacturing 🇩🇪 Wetzlar 4,606 1731
2
Viessmann Climate Solutionsviessmann-climatesolutions.com

Leading provider of climate and renewable energy solutions, specializing in heating, water, and air quality technologies since 1917 Creating sustainable living spaces

Industrial Machinery Manufacturing 🇩🇪 Allendorf 3,115 n/a
3
SGL Carbonsglcarbon.com

Global leader in carbon-based solutions for industries such as automotive, semiconductor, energy, and chemicals Committed to sustainability and innovation

Chemical Manufacturing 🇩🇪 Wiesbaden 2,079 1992
4
Techem Energy Services GmbHtechem.com

Global energy service provider promoting awareness of energy and water consumption for real estate sector and homeowners in over 20 countries Over 3,500 employees worldwide

IT Services and IT Consulting 🇩🇪 Eschborn 1,442 1952
5
Bosch Thermotechnik GmbHbosch-homecomfort.com

A global leader specializing in providing advanced thermotechnology solutions aimed at enhancing home comfort through innovative heating and cooling products

Renewable Energy Semiconductor Manufacturing 🇩🇪 Wetzlar 1,253 n/a
6
Süwag Energie AGsuewag.com

The company focuses on producing and distributing energy in an environmentally friendly way, promoting energy efficiency, and collaborating with communal partners for power generation

Utilities 🇩🇪 Frankfurt 1,158 n/a
7
Mainova AGmainova.de

Leading Frankfurt energy service provider supplying electricity, gas, heat, and water while offering renewable energy, electromobility, and infrastructure for climate neutrality.

Utilities 🇩🇪 Frankfurt 1,065 1998
8
Wintershall Deawintershalldea.com

A leading European gas and oil company transitioning to focus on gas, carbon management, and low carbon hydrogen projects globally

Oil and Gas 🇩🇪 Kassel 1,026 1894
9
ABO Energyaboenergy.com

Development, engineering, construction, and maintenance of wind, solar, hybrid energy, battery storage, and hydrogen projects worldwide.

Services for Renewable Energy 🇩🇪 Wiesbaden 918 1996
10
Infraserv GmbH & Co. Höchst KGinfraserv.com

Infraserv Höchst provides comprehensive solutions for chemical and pharmaceutical companies, offering services in energy supply, waste management, facility management, and more

Chemical Manufacturing 🇩🇪 Höchst 862 1997
11
Messer SE & Co. KGaAmessergroup.com

Supplier of industrial, medical, and specialty gases with customized solutions supporting safety, sustainability, and innovation across multiple industries worldwide.

Chemical Manufacturing 🇩🇪 Bad Soden 798 1898
12
Syna GmbHsyna.de

The company provides more information and site notices on their website

Utilities 🇩🇪 Frankfurt 744 n/a
13
Benderbender.de

A global provider of electrical solutions for safety and sustainability, offering innovative products tailored to various industries worldwide

Appliances, Electrical, and Electronics Manufacturing 🇩🇪 Grünberg 696 1946
14
AVL in Germanyavl.com

A global leader in mobility technology, AVL develops, tests, and simulates solutions for automotive and other industries, focusing on electrification, software, AI, and automation

Motor Vehicle Manufacturing 🇩🇪 Mainz-Kastel 613 1976
15
SBS Ecoclean Groupecoclean-group.net

Innovative global leader in providing efficient and sustainable solutions for industrial parts cleaning, surface processing, and green hydrogen generation

Machinery Manufacturing 🇩🇪 Frankfurt 578 n/a
16
ENTEGA AGentega.ag

A company dedicated to sustainability and climate protection, offering innovative solutions with a diverse workforce and a focus on reliability

Utilities 🇩🇪 Darmstadt 480 1992
17
SVOLT Energy Technology (Europe) GmbHsvolt.cn

Development and production of lithium battery materials, cells, modules, packs, management systems, and energy storage products globally.

Motor Vehicle Manufacturing 🇩🇪 Frankfurt 410 2018
18
CNGR Advanced Materialcngr.eu

A global supplier of energy materials for lithium batteries, focusing on technological innovation, energy efficiency, and sustainability through precursor production and recycling

Chemical Manufacturing 🇩🇪 Frankfurt 390 2014
19
TRACTEBEL [Germany]tractebel-engie.de

A leading consulting engineering company offering services in energy, hydropower, water resources, water supply, wastewater management, building, and transportation sectors globally

Utilities 🇩🇪 Bad Vilbel 372 1966
20
Fraunhofer IEEiee.fraunhofer.de

Research institute focused on developing technical and economic solutions for the global transition to renewable energy and ensuring grid stability

Research Services 🇩🇪 Kassel 315 2009
21
DB Energie GmbHdbenergie.de

A utilities company in Frankfurt, Germany, specializing in energy services and solutions

Utilities 🇩🇪 Frankfurt 311 n/a
22
Haltermann Carlesshaltermann-carless.com

A leading international supplier of high-value hydrocarbon-based specialty products and solvents, providing sustainable solutions for various industries with a focus on renewable resources

Chemical Manufacturing 🇩🇪 Frankfurt 222 1859
23
MAINGAU Energie GmbHmaingau-energie.de

A forward-thinking company offering E-mobility, online shopping, telecommunications, and energy services to 500,000 customers, with a focus on innovation and motivated team members

Utilities 🇩🇪 Obertshausen 202 1907
24
ABO Windaboenergy.com

Development and management of renewable energy projects across Europe, expanding technology range beyond wind to include diverse sustainable solutions.

Services for Renewable Energy 🇩🇪 Wiesbaden 186 1996
25
SMA Altensosma-altenso.com

A company specializing in PV-hybrid projects, large scale storage applications, and power-to-gas plants, leveraging over 30 years of industry expertise

Renewable Energy Power Generation 🇩🇪 Niestetal 120 2014
26
Cummins Deutschland GmbHcummins.com

The company is a German subsidiary that operates in the manufacturing and distribution of engines, power generation systems, and related technologies

Motor Vehicle Manufacturing 🇩🇪 Groß-Gerau 108 n/a
27
Chargemaker GmbHchargemaker.de

Supports real estate, companies, and hotels nationwide with planning, conceptualization, and operation of charging infrastructure for electromobility and energy management.

Renewable Energy Semiconductor Manufacturing 🇩🇪 Frankfurt 42 2020
28
RAEDIANraedian.com

Innovators in electric vehicle charging. Research, development, manufacturing, sales, and localization services. Integrating intelligent hardware, software, and service for sustainable transportation.

Appliances, Electrical, and Electronics Manufacturing 🇩🇪 Frankfurt 30 2022
29
StarCharge Europestarcharge.com

Pioneer in electric vehicle charging, offering diverse intelligent and reliable charging and energy solutions, including AC/DC chargers, residential, commercial, industrial, and grid-scale options, with cloud platforms.

Appliances, Electrical, and Electronics Manufacturing 🇩🇪 Raunheim 18 2019
30
ITM Power Germany GmbHitm-power.com

Manufactures integrated hydrogen energy solutions to optimize the use of renewable energy sources

Renewable Energy Semiconductor Manufacturing 🇩🇪 Frankfurt 9 2012

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 2, 2026.

More company lists in Hesse

The same list elsewhere in Germany