# Energy companies headquartered in Finland

Tamtam tracks 36 energy companies headquartered in Finland. This list ranks all of them by number of employees on LinkedIn, led by Wärtsilä, Valmet and Fortum. Their median headcount is 514. Half of them were founded in 1989 or later. The most common headquarters are Helsinki (13), Espoo (7) and Tampere (3).

This selection of large companies in Finland, mostly based in Helsinki and Espoo, includes several significant players in industrial machinery manufacturing and utilities. Wärtsilä, with 18,000 employees, specializes in sustainable technology and services, while Valmet provides process technologies for pulp, paper, and energy industries. Fortum is a major Nordic energy company focusing on clean energy, and Neste contributes to reducing greenhouse gas emissions. The list also features companies like Wärtsilä Marine and Wärtsilä Energy, both specializing in segments of Wärtsilä's broader operations.

A notable pattern among these companies is their strong focus on energy transition and sustainability. Many, like Fortum, Neste, and Sumitomo SHI FW, are actively involved in clean energy production, decarbonization, and renewable energy solutions. Another observation is the concentration of headquarters in the Helsinki metropolitan area, with several companies like Destia Oy, Helen, and St1 Oy also located in the capital, indicating a regional hub for energy and industrial expertise.

🇫🇮 Finland · 36 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Wärtsilä](https://www.tamtam.ai/c/wartsila) (wartsila.com)<br>This company empowers sustainable societies by providing innovative technology and services for improved environmental and economic performance globally | Industrial Machinery Manufacturing | 🇫🇮 Helsinki | 18,000 | 1834 |
| 2 | [Valmet](https://www.tamtam.ai/c/valmet) (valmet.com)<br>A global leader in process technologies, automation, and services for pulp, paper, energy industries, striving to enhance customer performance worldwide | Machinery Manufacturing | 🇫🇮 Espoo | 13,138 |  |
| 3 | [Fortum](https://www.tamtam.ai/c/fortum) (fortum.com)<br>A Nordic energy company focused on clean energy production, decarbonizing processes, and providing reliable power and heat to customers, with ambitious environmental targets | Utilities | 🇫🇮 Espoo | 5,168 |  |
| 4 | [Neste](https://www.tamtam.ai/c/neste) (neste.com)<br>Helping businesses reduce greenhouse gas emissions and fight climate change through meaningful sustainability and climate action initiatives. | Chemical Manufacturing | 🇫🇮 Espoo | 3,610 | 1948 |
| 5 | [Wärtsilä Marine](https://www.tamtam.ai/c/wartsila-marine) (wartsila.com)<br>A global leader providing engines, propulsion systems, hybrid technology, and powertrain solutions for decarbonizing the maritime industry with performance-based agreements and expertise | Maritime | 🇫🇮 Helsinki | 1,297 | 1834 |
| 6 | [Wärtsilä Energy](https://www.tamtam.ai/c/wartsila-energy) (wartsila.com)<br>The company specializes in helping customers transition to renewable energy by optimizing energy systems, providing flexible power plants, storage solutions, and lifecycle services | Mechanical Or Industrial Engineering | 🇫🇮 Helsinki | 1,124 | 1834 |
| 7 | [Destia Oy](https://www.tamtam.ai/c/destia-oy) (destia.fi)<br>Leading Finnish infrastructure service provider creating urban innovations and smart solutions for seamless movement of people, goods, services, and energy in the northern region | Construction | 🇫🇮 Helsinki | 944 | 2008 |
| 8 | [Helen](https://www.tamtam.ai/c/helen) (helen.fi)<br>Provides electricity, district heating, carbon-neutral cooling, solar power systems, and services for electric transport and energy efficiency in Finland. | Utilities | 🇫🇮 Helsinki | 801 | 1909 |
| 9 | [Kempower](https://www.tamtam.ai/c/kempower) (kempower.com)<br>Designs, manufactures reliable, user-friendly DC fast-charging solutions for electric vehicles. Focuses on all e-mobility areas, with modular, scalable systems and world-class software. | Appliances, Electrical, and Electronics Manufacturing | 🇫🇮 Lahti | 695 | 2017 |
| 10 | [Teollisuuden Voima Oyj](https://www.tamtam.ai/c/teollisuuden-voima-oyj) (tvo.fi)<br>The company contributes to sustainable development by providing cost-effective, safe, and climate-friendly electricity from a nuclear power plant in Finland | Nuclear Electric Power Generation | 🇫🇮 Eurajoki | 683 |  |
| 11 | [Valmet Technologies OY](https://www.tamtam.ai/c/valmet-technologies-oy) (en.wikipedia.org)<br>Developer and supplier of industrial technologies, automation systems, and specialized services tailored for global pulp, paper, and large scale energy production industries. | Software Development | 🇫🇮 Tampere | 652 |  |
| 12 | [Metsähallitus](https://www.tamtam.ai/c/metsahallitus) (metsa.fi)<br>This company sustainably manages forests and waters, offering renewable resources, enabling nature experiences, and promoting responsible energy and tourism solutions | Environmental Services | 🇫🇮 Helsinki | 645 | 1859 |
| 13 | [St1 Oy](https://www.tamtam.ai/c/st1-oy) (st1.com)<br>An energy group focused on producing and selling CO2-aware energy, researching sustainable solutions, and operating fuel marketing, oil refining, and renewable energy projects | Oil and Gas | 🇫🇮 Helsinki | 625 | 1997 |
| 14 | [Ensto](https://www.tamtam.ai/c/ensto) (ensto.com)<br>An international technology company creating smart solutions for electricity distribution networks, offering innovative products to help operators succeed sustainably | Appliances, Electrical, and Electronics Manufacturing | 🇫🇮 Porvoo | 559 |  |
| 15 | [Sumitomo SHI FW](https://www.tamtam.ai/c/sumitomo-shi-fw) (shi-fw.com)<br>Global provider of solutions driving energy decarbonization through biomass/waste energy, energy storage, carbon capture, waste recycling, and digital services for power and industrial markets worldwide | Machinery Manufacturing | 🇫🇮 Espoo | 552 | 2017 |
| 16 | [Fingrid Oyj](https://www.tamtam.ai/c/fingrid-oyj) (fingrid.fi)<br>A Finnish company responsible for electricity transmission in the high-voltage system, connecting power plants, factories, and distribution networks in Finland and abroad | Electric Power Transmission, Control, and Distribution | 🇫🇮 Helsinki | 549 | 1996 |
| 17 | [Enersense](https://www.tamtam.ai/c/enersense) (enersense.com)<br>This company creates zero emission energy solutions and services for companies in the industry, energy, telecommunications, and construction sectors | Services for Renewable Energy | 🇫🇮 Pori | 522 | 2005 |
| 18 | [Metsä Fibre](https://www.tamtam.ai/c/metsa-fibre) (metsagroup.com)<br>A leading producer of bioproducts, biochemicals, and bioenergy, specializing in bleached softwood pulp and sawn timber production on a global scale | Paper and Forest Product Manufacturing | 🇫🇮 Espoo | 514 | 1973 |
| 19 | [Osuuskauppa PeeÄssä](https://www.tamtam.ai/c/osuuskauppa-peeassa) (peeassa.fi)<br>A regional service company in Pohjois-Savo, Finland, operating in retail, tourism, catering, and fuel sales with 80 locations Focus on customer-owner benefits and community development | Retail | 🇫🇮 Kuopio | 385 | 1903 |
| 20 | [Gasum](https://www.tamtam.ai/c/gasum) (gasum.com)<br>A Nordic energy company providing cleaner energy solutions for industry, CHP production, and transportation, helping customers reduce their carbon footprint | Oil and Gas | 🇫🇮 Espoo | 375 | 1994 |
| 21 | [Adven – The leading partner in the energy transition](https://www.tamtam.ai/c/adven-the-leading-partner-in-the-energy-transition) (adven.com)<br>A dynamic energy group driving the energy transition with district heating, industrial partnerships, and sustainable energy solutions for properties and industries | Services for Renewable Energy | 🇫🇮 Vantaa | 352 |  |
| 22 | [Empower group](https://www.tamtam.ai/c/empower-group) (enersense.com)<br>Enersense, formerly Empower, provides empowering energy solutions Visit enersensecom for more information | Oil and Gas | 🇫🇮 Helsinki | 346 |  |
| 23 | [VEO Group](https://www.tamtam.ai/c/veo-group) (veo.fi)<br>Energy expert providing electrification and automation solutions for power sector, including renewables International presence with focus on exports Exciting opportunities for international projects | Electric Power Transmission, Control, and Distribution | 🇫🇮 Vaasa | 324 | 1989 |
| 24 | [Elenia](https://www.tamtam.ai/c/elenia) (elenia.fi)<br>The company serves over 435,000 residential and business customers in multiple regions in Finland, ensuring the functionality and modernization of the electricity grid They also provide energy-related customer service | Electric Power Transmission, Control, and Distribution | 🇫🇮 Tampere | 317 | 2012 |
| 25 | [Virta Ltd](https://www.tamtam.ai/c/virta-ltd) (virta.global)<br>Virta Ltd provides leading smart charging services for electric vehicles globally, focusing on creating a clean, emission-free future through innovative solutions | Software Development | 🇫🇮 Helsinki | 183 | 2013 |
| 26 | [Turku Energia](https://www.tamtam.ai/c/turku-energia) (turkuenergia.fi)<br>A leading energy company in Southwest Finland providing environmentally friendly energy services to 130,000 customers, with a focus on renewables | Utilities | 🇫🇮 Turku | 182 | 1898 |
| 27 | [Tampereen Energia](https://www.tamtam.ai/c/tampereen-energia) (tampereenenergia.fi)<br>A diverse energy company with nearly 400 professionals focusing on renewable energy solutions for heating, cooling, and electricity distribution Working towards carbon-negative homes by 2040 | Services for Renewable Energy | 🇫🇮 Tampere | 143 |  |
| 28 | [Lahti Energia Oy](https://www.tamtam.ai/c/lahti-energia-oy) (lahtienergia.fi)<br>A green energy company promoting renewable energy and circular economy solutions, aiming to provide sustainable heating, cooling, and electricity by 2035 | Utilities | 🇫🇮 Lahti | 112 | 1907 |
| 29 | [Omexom Suomi](https://www.tamtam.ai/c/omexom-suomi) (omexom.fi)<br>Omexom provides technical, construction, and maintenance solutions for energy projects in Finland, as part of the global VINCI Energies group | Electric Power Transmission, Control, and Distribution | 🇫🇮 Vantaa | 94 |  |
| 30 | [KSS Energia Oy](https://www.tamtam.ai/c/kss-energia-oy) (kssenergia.fi)<br>An energy group providing electricity, district heating, and natural gas, with a focus on renewable energy sources and sustainable energy solutions | Services for Renewable Energy | 🇫🇮 | 79 | 1974 |
| 31 | [Keravan Energia](https://www.tamtam.ai/c/keravan-energia) (keravanenergia.fi)<br>We provide energy services tailored to support businesses, offering a diverse range of energy production including bio, solar, wind, water, and nuclear power | Oil and Gas | 🇫🇮 Kerava | 63 | 1906 |
| 32 | [Taaleri Energia](https://www.tamtam.ai/c/taaleri-energia) (taaleri.com)<br>Renewable energy fund manager, developing and operating wind, solar, and battery storage assets for clean energy transition and strong investor returns. | Investment Management | 🇫🇮 Helsinki | 59 | 2011 |
| 33 | [Suomen Teollisuuden Energiapalvelut - STEP Oy](https://www.tamtam.ai/c/suomen-teollisuuden-energiapalvelut-step-oy) (stepenergy.veolia.fi)<br>This company provides sustainable energy, utility, and water treatment solutions to industrial customers in Finland, offering tailored solutions and long-term service agreements | Environmental Services | 🇫🇮 Espoo | 36 | 2008 |
| 34 | [Vatajankoski](https://www.tamtam.ai/c/vatajankoski) (vatajankoski.fi)<br>A new energy company that saves energy, produces the rest with domestic renewable fuels, helps customers increase energy self-sufficiency, and reduce carbon footprint | Utilities | 🇫🇮 Kankaanpää | 25 | 1926 |
| 35 | [Eolus Finland](https://www.tamtam.ai/c/eolus-finland) (eolus.com)<br>Develop, construct, and manage renewable energy projects across Nordic, Baltic, Poland, and US regions, offering sustainable investment opportunities. | Services for Renewable Energy | 🇫🇮 Helsinki | 7 | 1990 |
| 36 | [Parking Energy](https://www.tamtam.ai/c/parking-energy) (parkingenergy.com)<br>Parking Energy provides EV charging solutions for real estate in Europe, focusing on customer-centric, cost-effective, scalable, and future-proof solutions for sustainable mobility transition | Appliances, Electrical, and Electronics Manufacturing | 🇫🇮 Helsinki | 3 | 2014 |

## 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 Finland

- [The largest companies in Finland](https://www.tamtam.ai/l/largest-companies-finland) (1,471)
- [Multinational companies in Finland](https://www.tamtam.ai/l/multinational-companies-finland) (431)
- [Companies with in-house R&D in Finland](https://www.tamtam.ai/l/r-and-d-companies-finland) (177)
- [Manufacturers in Finland](https://www.tamtam.ai/l/manufacturers-finland) (176)
- [Software Development companies in Finland](https://www.tamtam.ai/l/software-development-companies-finland) (159)
- [SaaS companies in Finland](https://www.tamtam.ai/l/saas-companies-finland) (157)
- [Retail chains in Finland](https://www.tamtam.ai/l/retail-chains-finland) (150)
- [Critical infrastructure operators in Finland](https://www.tamtam.ai/l/critical-infrastructure-operators-finland) (116)
- [Public sector organisations in Finland](https://www.tamtam.ai/l/public-sector-organisations-finland) (115)
- [Hardware manufacturers in Finland](https://www.tamtam.ai/l/hardware-companies-finland) (111)
- [Publicly traded companies in Finland](https://www.tamtam.ai/l/publicly-traded-companies-finland) (110)
- [Companies with a mobile app in Finland](https://www.tamtam.ai/l/companies-with-mobile-app-finland) (102)
- [IT Services and IT Consulting companies in Finland](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-finland) (101)
- [IT services companies in Finland](https://www.tamtam.ai/l/it-services-companies-finland) (88)
- [Corporate groups and holding companies in Finland](https://www.tamtam.ai/l/holding-companies-finland) (84)
- [Education providers in Finland](https://www.tamtam.ai/l/education-companies-finland) (82)
- [Professional services firms in Finland](https://www.tamtam.ai/l/professional-services-firms-finland) (79)
- [Government Administration companies in Finland](https://www.tamtam.ai/l/government-administration-companies-finland) (77)
- [Financial services firms in Finland](https://www.tamtam.ai/l/financial-services-firms-finland) (73)
- [Hotel and hospitality groups in Finland](https://www.tamtam.ai/l/hospitality-groups-finland) (69)
- [Family-owned companies in Finland](https://www.tamtam.ai/l/family-owned-companies-finland) (69)
- [AI companies in Finland](https://www.tamtam.ai/l/ai-companies-finland) (62)
- [Financial Services companies in Finland](https://www.tamtam.ai/l/financial-services-companies-finland) (62)
- [Subscription businesses in Finland](https://www.tamtam.ai/l/subscription-businesses-finland) (57)

## 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)

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Source: https://www.tamtam.ai/l/energy-companies-finland