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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Wärtsiläwartsila.com
This company empowers sustainable societies by providing innovative technology and services for improved environmental and economic performance globally |
18,000 | |||
| 2 |
Valmetvalmet.com
A global leader in process technologies, automation, and services for pulp, paper, energy industries, striving to enhance customer performance worldwide |
13,138 | |||
| 3 |
Fortumfortum.com
A Nordic energy company focused on clean energy production, decarbonizing processes, and providing reliable power and heat to customers, with ambitious environmental targets |
5,168 | |||
| 4 | 3,610 | ||||
| 5 |
Wärtsilä Marinewartsila.com
A global leader providing engines, propulsion systems, hybrid technology, and powertrain solutions for decarbonizing the maritime industry with performance-based agreements and expertise |
1,297 | |||
| 6 |
Wärtsilä Energywartsila.com
The company specializes in helping customers transition to renewable energy by optimizing energy systems, providing flexible power plants, storage solutions, and lifecycle services |
1,124 | |||
| 7 | 944 | ||||
| 8 | 801 | ||||
| 9 |
Kempowerkempower.com
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. |
695 | |||
| 10 |
Teollisuuden Voima Oyjtvo.fi
The company contributes to sustainable development by providing cost-effective, safe, and climate-friendly electricity from a nuclear power plant in Finland |
683 | |||
| 11 |
Valmet Technologies OYen.wikipedia.org
Developer and supplier of industrial technologies, automation systems, and specialized services tailored for global pulp, paper, and large scale energy production industries. |
652 | |||
| 12 |
Metsähallitusmetsa.fi
This company sustainably manages forests and waters, offering renewable resources, enabling nature experiences, and promoting responsible energy and tourism solutions |
645 | |||
| 13 | 625 | ||||
| 14 | 559 | ||||
| 15 |
Sumitomo SHI FWshi-fw.com
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 |
552 | |||
| 16 |
Fingrid Oyjfingrid.fi
A Finnish company responsible for electricity transmission in the high-voltage system, connecting power plants, factories, and distribution networks in Finland and abroad |
549 | |||
| 17 |
Enersenseenersense.com
This company creates zero emission energy solutions and services for companies in the industry, energy, telecommunications, and construction sectors |
522 | |||
| 18 |
Metsä Fibremetsagroup.com
A leading producer of bioproducts, biochemicals, and bioenergy, specializing in bleached softwood pulp and sawn timber production on a global scale |
514 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 19 |
Osuuskauppa PeeÄssäpeeassa.fi
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 |
385 | |||
| 20 | 375 | ||||
| 21 |
Adven – The leading partner in the energy transitionadven.com
A dynamic energy group driving the energy transition with district heating, industrial partnerships, and sustainable energy solutions for properties and industries |
352 | |||
| 22 |
Empower groupenersense.com
Enersense, formerly Empower, provides empowering energy solutions Visit enersensecom for more information |
346 | |||
| 23 | 324 | ||||
| 24 | 317 | ||||
| 25 |
Virta Ltdvirta.global
Virta Ltd provides leading smart charging services for electric vehicles globally, focusing on creating a clean, emission-free future through innovative solutions |
183 | |||
| 26 |
Turku Energiaturkuenergia.fi
A leading energy company in Southwest Finland providing environmentally friendly energy services to 130,000 customers, with a focus on renewables |
182 | |||
| 27 |
Tampereen Energiatampereenenergia.fi
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 |
143 | |||
| 28 |
Lahti Energia Oylahtienergia.fi
A green energy company promoting renewable energy and circular economy solutions, aiming to provide sustainable heating, cooling, and electricity by 2035 |
112 | |||
| 29 |
Omexom Suomiomexom.fi
Omexom provides technical, construction, and maintenance solutions for energy projects in Finland, as part of the global VINCI Energies group |
94 | |||
| 30 |
KSS Energia Oykssenergia.fi
An energy group providing electricity, district heating, and natural gas, with a focus on renewable energy sources and sustainable energy solutions |
79 | |||
| 31 |
Keravan Energiakeravanenergia.fi
We provide energy services tailored to support businesses, offering a diverse range of energy production including bio, solar, wind, water, and nuclear power |
63 | |||
| 32 |
Taaleri Energiataaleri.com
Renewable energy fund manager, developing and operating wind, solar, and battery storage assets for clean energy transition and strong investor returns. |
59 | |||
| 33 |
Suomen Teollisuuden Energiapalvelut - STEP Oystepenergy.veolia.fi
This company provides sustainable energy, utility, and water treatment solutions to industrial customers in Finland, offering tailored solutions and long-term service agreements |
36 | |||
| 34 |
Vatajankoskivatajankoski.fi
A new energy company that saves energy, produces the rest with domestic renewable fuels, helps customers increase energy self-sufficiency, and reduce carbon footprint |
25 | |||
| 35 |
Eolus Finlandeolus.com
Develop, construct, and manage renewable energy projects across Nordic, Baltic, Poland, and US regions, offering sustainable investment opportunities. |
7 | |||
| 36 |
Parking Energyparkingenergy.com
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 |
3 | |||
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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 12, 2026.
More company lists in Finland
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- Critical infrastructure operators in Finland 116
- Public sector organisations in Finland 115
- Hardware manufacturers in Finland 111
- Publicly traded companies in Finland 110
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- Financial Services companies in Finland 62
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