# The 50 largest energy companies in Switzerland Tamtam tracks 151 energy companies headquartered in Switzerland. This list ranks the 50 largest by number of employees on LinkedIn, led by ABB, Hitachi Energy and Transocean. Their median headcount is 933. Half of them were founded in 1946 or later. The most common headquarters are Zurich (7), Geneva (4) and Bern (3). These are primarily large and mid-sized companies in Switzerland, predominantly focused on energy, utilities, and related industrial services. The list includes manufacturers of automation machinery, providers of advanced power grid technologies, and offshore drilling services. Many of these firms operate internationally. Key companies include ABB, which connects engineering and software for industrial transformation, and Hitachi Energy, a global leader in electrification and digital solutions. Transocean provides offshore contract drilling services, while fenaco is an agricultural cooperative. A common pattern is the concentration of headquarters in Zurich and Zug, indicating these cities as significant hubs for the energy and industrial sectors. πŸ‡¨πŸ‡­ Switzerland Β· 50 companies Β· Updated Nov 12, 2026 | # | Company | Industry | Headquarters | Employees | Founded | |---|---|---|---|---|---| | 1 | [ABB](https://www.tamtam.ai/c/abb-zurich) (abb.com)
Connects engineering and software to optimize how things are manufactured, moved, powered, and operated for a sustainable, resource-efficient future, driving industrial transformation. | Automation Machinery Manufacturing | πŸ‡¨πŸ‡­ Zurich | 146,155 | | | 2 | [Hitachi Energy](https://www.tamtam.ai/c/hitachi-energy) (hitachienergy.com)
Global leader in electrification providing advanced power grid technologies and digital solutions to support sustainable energy and decarbonization efforts. | Utilities | πŸ‡¨πŸ‡­ Zurich | 36,864 | | | 3 | [Transocean](https://www.tamtam.ai/c/transocean) (deepwater.com)
A leading provider of offshore contract drilling services for oil and gas wells, specializing in deepwater and harsh environment drilling with a versatile fleet of mobile units | Oil and Gas | πŸ‡¨πŸ‡­ Zug | 10,702 | | | 4 | [fenaco](https://www.tamtam.ai/c/fenaco) (fenaco.com)
An agricultural cooperative owned by 165 LANDI and 43,000+ members, including 23,000 Swiss farmers They market Swiss food products and provide agricultural products and services | Farming | πŸ‡¨πŸ‡­ Bern | 3,168 | 1993 | | 5 | [AMAG Group](https://www.tamtam.ai/c/amag-group) (amag-group.ch)
A comprehensive mobility provider focused on customer satisfaction, selling high-grade vehicles, offering leasing services, and aiming to be climate-neutral | Motor Vehicle Manufacturing | πŸ‡¨πŸ‡­ Cham | 3,119 | 1945 | | 6 | [HOERBIGER](https://www.tamtam.ai/c/hoerbiger) (hoerbiger.com)
A global company with 5,862 employees providing products and services in various industries including energy, automotive, and mechanical engineering | Machinery Manufacturing | πŸ‡¨πŸ‡­ Zug | 3,041 | 1895 | | 7 | [Allseas](https://www.tamtam.ai/c/allseas) (allseas.com)
A world-leading contractor in offshore energy, specializing in pipeline installation, heavy lift, deep-ocean polymetallic nodule collection, and river waste collection, pushing boundaries with innovative technology | Engineering Services | πŸ‡¨πŸ‡­ ChΓ’tel-Saint-Denis | 3,023 | 1985 | | 8 | [Ville de Lausanne](https://www.tamtam.ai/c/ville-de-lausanne) (lausanne.ch)
Manages a large metropolitan area, providing essential services, fostering education and culture, and promoting sustainability and tourism for its diverse population. | Government Administration | πŸ‡¨πŸ‡­ | 2,861 | | | 9 | [Alpiq](https://www.tamtam.ai/c/alpiq) (alpiq.com)
A leading Swiss energy producer offering comprehensive services in electricity generation, marketing, optimization, and trading throughout Europe with a focus on sustainability | Utilities | πŸ‡¨πŸ‡­ Lausanne | 2,420 | 2009 | | 10 | [Kanadevia Inova](https://www.tamtam.ai/c/kanadevia-inova) (kanadevia-inova.com)
Global leader in waste-to-energy and renewable gas technologies, providing turnkey systems and lifecycle support for sustainable resource transformation. | Services for Renewable Energy | πŸ‡¨πŸ‡­ | 2,080 | | | 11 | [Burckhardt Compression](https://www.tamtam.ai/c/burckhardt-compression) (burckhardtcompression.com)
Design and manufacture of modular reciprocating compressor systems for chemical, gas, hydrogen, refinery, and industrial gas sectors worldwide. | Machinery Manufacturing | πŸ‡¨πŸ‡­ Winterthur | 1,877 | 1844 | | 12 | [SIG](https://www.tamtam.ai/c/sig) (ww2.sig-ge.ch)
A Swiss supplier of local energy services offering water, gas, electricity, thermal energy, waste management, and energy & telecommunications services Promoting smarter energy consumption | Utilities | πŸ‡¨πŸ‡­ Le Lignon | 1,794 | 1896 | | 13 | [Impala Terminals](https://www.tamtam.ai/c/impala-terminals) (impalaterminals.com)
Facilitating global commodity trade by providing storage and logistics services to energy and dry bulk customers through a network of strategically located assets worldwide | Transportation, Logistics, Supply Chain and Storage | πŸ‡¨πŸ‡­ Geneva | 1,728 | | | 14 | [Equans Switzerland](https://www.tamtam.ai/c/equans-switzerland) (equans.ch)
Leading provider in Switzerland for Energy Services, Facility Management, and Building Technology Offering high-quality solutions to reduce energy consumption and improve efficiency for various sectors | Energy Technology | πŸ‡¨πŸ‡­ Zurich | 1,572 | 2024 | | 15 | [BKW AG](https://www.tamtam.ai/c/bkw-ag) (bkw.ch)
An international energy and infrastructure organization in Bern, addressing climate change, urbanization, and digitalization challenges through innovative solutions and projects | Utilities | πŸ‡¨πŸ‡­ Bern | 1,459 | 1898 | | 16 | [Mercuria](https://www.tamtam.ai/c/mercuria-geneva) (mercuria.com)
Trading and supplying physical commodities, investing in strategic assets, financing, logistics, and advancing sustainable energy solutions worldwide. | Oil and Gas | πŸ‡¨πŸ‡­ Geneva | 1,409 | 2004 | | 17 | [Groupe E](https://www.tamtam.ai/c/groupe-e) (groupe-e.ch)
A utility specialized in producing, distributing, and selling electricity, as well as offering energy-related services like telecommunications, district heating, and public lighting | Utilities | πŸ‡¨πŸ‡­ Granges-Paccot | 1,245 | 1907 | | 18 | [Weidmann](https://www.tamtam.ai/c/weidmann) (weidmann-group.com)
Global leader in providing technological solutions for energy and medical industries, specializing in transformer insulation and advanced plastics for pharmaceutical applications | International Trade and Development | πŸ‡¨πŸ‡­ Rapperswil | 1,212 | 1877 | | 19 | [MET Group](https://www.tamtam.ai/c/met-group) (met.com)
An integrated European energy company with extensive experience in natural gas and power markets, operating renewable and conventional energy assets globally | Oil and Gas | πŸ‡¨πŸ‡­ Baar | 1,136 | | | 20 | [LEM](https://www.tamtam.ai/c/lem) (lem.com)
A leading global company specializing in electrical measurement solutions for energy and mobility, focusing on innovation and sustainability in over 15 countries | Appliances, Electrical, and Electronics Manufacturing | πŸ‡¨πŸ‡­ Meyrin | 1,106 | 1972 | | 21 | [Gunvor Group](https://www.tamtam.ai/c/gunvor-group) (gunvorgroup.com)
Independent commodities trading house specializing in energy, metals, and bulk materials logistics with investments in infrastructure and supply chain solutions. | Oil and Gas | πŸ‡¨πŸ‡­ Geneva | 1,034 | 2000 | | 22 | [Repower](https://www.tamtam.ai/c/repower) (repower.com)
An experienced energy sales and service provider with operations in Switzerland and Italy, offering a range of services along the electricity value chain | Utilities | πŸ‡¨πŸ‡­ Poschiavo | 1,024 | 1904 | | 23 | [ewz](https://www.tamtam.ai/c/ewz) (ewz.ch)
Provide renewable energy to households, develop sustainable energy solutions, expand intelligent power grids, and implement digital infrastructure for urban development. | Utilities | πŸ‡¨πŸ‡­ Zurich | 977 | 1892 | | 24 | [Weidmann Electrical Technology](https://www.tamtam.ai/c/weidmann-electrical-technology) (weidmann-electrical.com)
Global leader in electrical insulation for transformers. Specializes in customized cellulose-based insulation systems and high-temperature applications with top-quality control. | Electrical Equipment Manufacturing | πŸ‡¨πŸ‡­ | 954 | | | 25 | [Linxon](https://www.tamtam.ai/c/linxon) (linxon.com)
Specializing in turnkey electrical AC substation projects for power generation, transmission, and transportation solutions, offering design, engineering, construction, and support services | Construction | πŸ‡¨πŸ‡­ Baden | 933 | 2018 | | 26 | [CKW](https://www.tamtam.ai/c/ckw) (ckw.ch)
A leading Swiss provider of integrated energy and building technology solutions, serving over 200,000 customers with eco-friendly power and district heating for over 125 years | Utilities | πŸ‡¨πŸ‡­ Lucerne | 889 | 1894 | | 27 | [Swissgrid AG](https://www.tamtam.ai/c/swissgrid-ag) (swissgrid.ch)
Ensuring the safe and reliable operation, maintenance, and modernization of Switzerland's high-voltage grid with over 700 employees, emphasizing innovation, quality, and teamwork | Utilities | πŸ‡¨πŸ‡­ Aarau | 866 | 2006 | | 28 | [Romande Energie](https://www.tamtam.ai/c/romande-energie) (romande-energie.ch)
A leading energy company in French-speaking Switzerland, offering sustainable energy solutions, services, efficiency, and electric mobility to create a better living environment | Environmental Services | πŸ‡¨πŸ‡­ Morges | 841 | 1997 | | 29 | [EKZ](https://www.tamtam.ai/c/ekz) (ekz.ch)
Supplying reliable, ecological electricity to one million people, expanding renewable energy sources, maintaining extensive power grid, supporting electric mobility solutions. | Utilities | πŸ‡¨πŸ‡­ Zurich | 826 | 1908 | | 30 | [VARO Energy](https://www.tamtam.ai/c/varo-energy) (varoenergy.com)
Operates across energy value chains, including manufacturing, storage, distribution, marketing, trading, and sustainable energies, with facilities across Europe, Asia, and South America. | Oil and Gas | πŸ‡¨πŸ‡­ Baar | 805 | 2012 | | 31 | [IWB Industrielle Werke Basel](https://www.tamtam.ai/c/iwb-industrielle-werke-basel) (iwb.ch)
A regional energy service provider ensuring the supply of clean drinking water to the population of Basel and Binningen | Utilities | πŸ‡¨πŸ‡­ Basel | 801 | | | 32 | [Sulzer Rotating Equipment Services](https://www.tamtam.ai/c/sulzer-rotating-equipment-services) (sulzer.com)
Global provider of repair and maintenance services for industrial turbines, compressors, generators, and ancillary equipment with over 100 locations worldwide | Oil and Gas | πŸ‡¨πŸ‡­ Winterthur | 755 | | | 33 | [VAROPreem](https://www.tamtam.ai/c/varopreem) (varopreem.com)
Leading European energy company. Sourcing, manufacturing, storage, trading, distribution, marketing. Critical infrastructure. Europe's third-largest independent refiner, second-largest renewable fuels producer. EV charging developer. | Oil and Gas | πŸ‡¨πŸ‡­ | 636 | | | 34 | [Stadt St.Gallen](https://www.tamtam.ai/c/stadt-st-gallen) (stadt.sg.ch)
Provides diverse municipal services including street maintenance, electricity, and parks, offering meaningful work and development opportunities. | Government Administration | πŸ‡¨πŸ‡­ Saint Gallen | 632 | | | 35 | [SOCAR Trading](https://www.tamtam.ai/c/socar-trading) (socartrading.com)
A subsidiary of SOCAR, the company trades oil, gas, and refined products, focuses on sustainability, and empowers teams to exceed client demands | Oil and Gas | πŸ‡¨πŸ‡­ Geneva | 578 | 2008 | | 36 | [Gutor](https://www.tamtam.ai/c/gutor) (gutor.com)
Leading international manufacturer of industrial uninterruptible power supply systems, with over 75 years of experience in providing secure, customized, and reliable power solutions | Industrial Machinery Manufacturing | πŸ‡¨πŸ‡­ Wettingen | 541 | 1946 | | 37 | [SΓ©cheron SA](https://www.tamtam.ai/c/secheron-sa) (secheron.com)
Design and manufacture high-power electrical equipment and solutions for railway traction, safety, and power systems including substations and circuit breakers. | Appliances, Electrical, and Electronics Manufacturing | πŸ‡¨πŸ‡­ Satigny - Geneva | 498 | | | 38 | [Hitachi Zosen Inova](https://www.tamtam.ai/c/hitachi-zosen-inova) (kanadevia-inova.com)
Development and construction of turnkey plants for thermal and biological waste recovery, supporting energy transition and circular economy globally. | Services for Renewable Energy | πŸ‡¨πŸ‡­ Zurich | 496 | | | 39 | [Rosenxt Group](https://www.tamtam.ai/c/rosenxt-group) (rosen-nxt.com)
Explores disruptive opportunities, building ventures serving critical infrastructure customers in harsh environments, focusing on process optimization and advanced integrity solutions. | Engineering Services | πŸ‡¨πŸ‡­ Stans | 476 | | | 40 | [WinGD Ltd.](https://www.tamtam.ai/c/wingd-ltd) (wingd.com)
Designs advanced low-speed two-stroke marine engines and power ecosystems focused on emissions reduction, fuel efficiency, and digital service support. | Industrial Machinery Manufacturing | πŸ‡¨πŸ‡­ Winterthur | 448 | 1893 | | 41 | [Energie Wasser Bern](https://www.tamtam.ai/c/energie-wasser-bern) (ewb.ch)
Supply electricity, gas, district heating, and water; convert waste to energy; provide energy services and efficiency consulting. | Utilities | πŸ‡¨πŸ‡­ Bern | 447 | 2002 | | 42 | [R&S Group](https://www.tamtam.ai/c/r-and-s-group) (the-rsgroup.com)
A leading provider of electrical infrastructure products, offering transformers, switching devices, railway electrification products, and high current connectors for utility, industry, and railway customers | Appliances, Electrical, and Electronics Manufacturing | πŸ‡¨πŸ‡­ Sissach | 415 | 2012 | | 43 | [Energie 360Β°](https://www.tamtam.ai/c/energie-360) (energie360.ch)
It offers tailored, eco-friendly energy solutions, ensuring ecology, supply security, and economic efficiency as a reliable partner in Switzerland. | Utilities | πŸ‡¨πŸ‡­ | 372 | | | 44 | [Primeo Energie](https://www.tamtam.ai/c/primeo-energie) (primeo-energie.ch)
A forward-thinking energy company in Switzerland and France providing smart home solutions, sustainable mobility, and energy efficiency services for individuals, businesses, and municipalities | Utilities | πŸ‡¨πŸ‡­ MΓΌnchenstein | 356 | 1897 | | 45 | [Broadcast](https://www.tamtam.ai/c/broadcast) (odegard.ch)
Specializing in broadcasting services to reach a wide audience, the platform aims to distribute content efficiently and effectively | Broadcast Media Production and Distribution | πŸ‡¨πŸ‡­ Zurich | 345 | | | 46 | [AEW Energie AG](https://www.tamtam.ai/c/aew-energie-ag) (aew.ch)
Secure, climate-friendly electricity and heating production using hydropower, solar, wind; grid operation and energy-related services. | Utilities | πŸ‡¨πŸ‡­ Aarau | 345 | 1916 | | 47 | [Landis+Gyr EMEA](https://www.tamtam.ai/c/landis-gyr-emea) (landisgyr.eu)
Provision of advanced metering, network intelligence, and digital solutions to support electricity, gas, and water utilities across Europe, Middle East, and Africa. | Appliances, Electrical, and Electronics Manufacturing | πŸ‡¨πŸ‡­ Cham | 335 | 2026 | | 48 | [EBL (Genossenschaft Elektra Baselland)](https://www.tamtam.ai/c/ebl-genossenschaft-elektra-baselland-liestal) (ebl.ch)
Promoting renewable energy generation, advocating economical energy use, and investing in innovative, sustainable projects for customers, population, industry, public sector, and environment. | Utilities | πŸ‡¨πŸ‡­ Liestal | 333 | 1898 | | 49 | [Brugg Cables \| Terna Energy Solutions](https://www.tamtam.ai/c/brugg-cables-terna-energy-solutions) (bruggcables.com)
Swiss manufacturer specializing in innovative cables and accessories for energy transmission and distribution with comprehensive service offerings. | Manufacturing | πŸ‡¨πŸ‡­ Brugg | 317 | 1896 | | 50 | [Coop Pronto AG](https://www.tamtam.ai/c/coop-pronto-ag) (coop-pronto.ch)
Leading Swiss company operating over 320 Coop Pronto shops and tank stations, focusing on convenience retail and energy services. | Retail | πŸ‡¨πŸ‡­ Allschwil | 307 | 1972 | ## 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 12, 2026. ## More company lists in Switzerland - [The largest companies in Switzerland](https://www.tamtam.ai/l/largest-companies-switzerland) (6,776) - [Multinational companies in Switzerland](https://www.tamtam.ai/l/multinational-companies-switzerland) (1,793) - [Companies with in-house R&D in Switzerland](https://www.tamtam.ai/l/r-and-d-companies-switzerland) (916) - [Financial services firms in Switzerland](https://www.tamtam.ai/l/financial-services-firms-switzerland) (875) - [Manufacturers in Switzerland](https://www.tamtam.ai/l/manufacturers-switzerland) (748) - [Real Estate companies in Switzerland](https://www.tamtam.ai/l/real-estate-companies-switzerland) (637) - [IT Services and IT Consulting companies in Switzerland](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-switzerland) (574) - [Hardware manufacturers in Switzerland](https://www.tamtam.ai/l/hardware-companies-switzerland) (538) - [Financial Services companies in Switzerland](https://www.tamtam.ai/l/financial-services-companies-switzerland) (525) - [IT services companies in Switzerland](https://www.tamtam.ai/l/it-services-companies-switzerland) (438) - [SaaS companies in Switzerland](https://www.tamtam.ai/l/saas-companies-switzerland) (435) - [Retail chains in Switzerland](https://www.tamtam.ai/l/retail-chains-switzerland) (424) - [Professional services firms in Switzerland](https://www.tamtam.ai/l/professional-services-firms-switzerland) (402) - [Software Development companies in Switzerland](https://www.tamtam.ai/l/software-development-companies-switzerland) (380) - [Critical infrastructure operators in Switzerland](https://www.tamtam.ai/l/critical-infrastructure-operators-switzerland) (378) - [Family-owned companies in Switzerland](https://www.tamtam.ai/l/family-owned-companies-switzerland) (346) - [Consulting firms in Switzerland](https://www.tamtam.ai/l/consulting-firms-switzerland) (288) - [Publicly traded companies in Switzerland](https://www.tamtam.ai/l/publicly-traded-companies-switzerland) (262) - [Pharmaceutical companies in Switzerland](https://www.tamtam.ai/l/pharmaceutical-companies-switzerland) (242) - [Property management companies in Switzerland](https://www.tamtam.ai/l/property-management-companies-switzerland) (227) - [Companies with a mobile app in Switzerland](https://www.tamtam.ai/l/companies-with-mobile-app-switzerland) (225) - [Medical Equipment Manufacturing companies in Switzerland](https://www.tamtam.ai/l/medical-equipment-manufacturing-companies-switzerland) (225) - [Medical device companies in Switzerland](https://www.tamtam.ai/l/medical-device-companies-switzerland) (223) - [Investment Management companies in Switzerland](https://www.tamtam.ai/l/investment-management-companies-switzerland) (216) ## The same list elsewhere in Switzerland - [Energy companies in Canton of Zurich](https://www.tamtam.ai/l/energy-companies-canton-of-zurich) (31) ## The same list elsewhere - [Energy companies in the world](https://www.tamtam.ai/l/energy-companies-in-the-world) (10,502) - [Energy companies in Europe](https://www.tamtam.ai/l/energy-companies-in-europe) (4,235) --- Source: https://www.tamtam.ai/l/energy-companies-switzerland