1,737
Active legal entities
The starting population matching current main industry and active register status.
Finland's 30 largest electricity companies in 2026
We mapped active Finnish companies in electricity generation, transmission, distribution, and trade in DM Faster's PRH-backed data and ranked the largest 30 by their latest revenue observation.
DM Faster market map
1,737
Active legal entities
- 101
- 30
Company, classification, and financial observations from DM Faster company data. Official identities and active register status are based on PRH Open Data.
Short answer
The three largest legal entities in this comparison are Fortum Power and Heat Oy (€1.9B), Helen Oy (€1.4B), and Switch Nordic Green AB Filial Finland (€1.3B).
Legal-entity comparison
Finland's 30 largest electricity companies in 2026
Every row shows rank, official legal entity, Finnish Business ID, current PRH main industry, fiscal year, personnel, and the DM Faster revenue observation.
Fortum Power and Heat Oy
€1.9BSähkön tuotanto uusiutumattomilla energialähteillä
Helen Oy
€1.4BSähkön tuotanto uusiutumattomilla energialähteillä
Switch Nordic Green AB Filial Finland
€1.3BSähkön kauppa
Fingrid Oyj
€1.1BSähkön siirto
Vattenfall Oy
€754.7MSähkön kauppa
UPM Energy Oy
€579.8MSähkön tuotanto vesivoimalla
Fortum Markets Oy
€508.5MSähkön kauppa
Oomi Oy
€374MSähkön kauppa
Elenia Verkko Oyj
€356.1MSähkön siirto
Oy Turku Energia-Åbo Energi Ab
€333.2MSähkön jakelu
- 1
Fortum Power and Heat Oy
Sähkön tuotanto uusiutumattomilla energialähteillä
€1,886,580,000
- Business ID
- 0109160-2
- Fiscal year
- 2024
- Personnel
- 1,245
- 2
Helen Oy
Sähkön tuotanto uusiutumattomilla energialähteillä
€1,394,233,000
- Business ID
- 2630573-4
- Fiscal year
- 2024
- Personnel
- 682
- 3
Switch Nordic Green AB Filial Finland
Sähkön kauppa
€1,343,414,000
- Business ID
- 2220675-5
- Fiscal year
- 2024
- Personnel
- 75
- 4
Fingrid Oyj
Sähkön siirto
€1,118,476,000
- Business ID
- 1072894-3
- Fiscal year
- 2025
- Personnel
- 622
- 5
Vattenfall Oy
Sähkön kauppa
€754,695,000
- Business ID
- 1842073-2
- Fiscal year
- 2024
- Personnel
- 93
- 6
UPM Energy Oy
Sähkön tuotanto vesivoimalla
€579,779,000
- Business ID
- 2760639-5
- Fiscal year
- 2025
- Personnel
- 65
- 7
Fortum Markets Oy
Sähkön kauppa
€508,481,000
- Business ID
- 1852328-0
- Fiscal year
- 2024
- Personnel
- 149
- 8
Oomi Oy
Sähkön kauppa
€373,967,000
- Business ID
- 3101315-4
- Fiscal year
- 2024
- Personnel
- 72
- 9
Elenia Verkko Oyj
Sähkön siirto
€356,147,000
- Business ID
- 3001882-6
- Fiscal year
- 2025
- Personnel
- 80
- 10
Oy Turku Energia-Åbo Energi Ab
Sähkön jakelu
€333,211,000
- Business ID
- 0984944-9
- Fiscal year
- 2025
- Personnel
- 287
- 11
Tampereen Energia Oy
Sähkön tuotanto uusiutumattomilla energialähteillä
€193,039,000
- Business ID
- 0153791-8
- Fiscal year
- 2025
- Personnel
- 198
- 12
Alva-yhtiöt Oy
Sähkön tuotanto uusiutumattomilla energialähteillä
€178,130,000
- Business ID
- 1071200-1
- Fiscal year
- 2024
- Personnel
- 210
- 13
Lahti Energia Oy
Sähkön tuotanto uusiutumattomilla energialähteillä
€136,895,000
- Business ID
- 0804847-1
- Fiscal year
- 2025
- Personnel
- 168
- 14
Savon Voima Oyj
Sähkön jakelu
€134,677,000
- Business ID
- 0171351-2
- Fiscal year
- 2025
- Personnel
- 181
- 15
Vaasan Sähkö Oy
Sähkön kauppa
€130,618,208
- Business ID
- 0209628-8
- Fiscal year
- 2025
- Personnel
- 103
- 16
PKS Sähkönsiirto Oy
Sähkön siirto
€110,849,000
- Business ID
- 2071638-0
- Fiscal year
- 2025
- Personnel
- 20
- 17
Savon Voima Verkko Oy
Sähkön siirto
€104,974,000
- Business ID
- 2078265-2
- Fiscal year
- 2025
- Personnel
- 35
- 18
Oy Herrfors Ab
Sähkön siirto
€103,100,000
- Business ID
- 0180010-6
- Fiscal year
- 2024
- Personnel
- 54
- 19
Pohjois-Karjalan Sähkö Oy
Sähkön kauppa
€99,188,000
- Business ID
- 0214732-1
- Fiscal year
- 2025
- Personnel
- 58
- 20
Seinäjoen Energia Oy
Sähkön jakelu
€93,955,000
- Business ID
- 0974008-0
- Fiscal year
- 2025
- Personnel
- 89
- 21
Kemijoki Oy
Sähkön tuotanto vesivoimalla
€92,628,000
- Business ID
- 0192171-7
- Fiscal year
- 2024
- Personnel
- 48
- 22
Kuopion Energia Oy
Muu sähkön tuotanto uusiutuvilla energialähteillä
€91,441,000
- Business ID
- 2064700-4
- Fiscal year
- 2025
- Personnel
- 115
- 23
Enersense Services Oyj
Sähkön tuotanto vesivoimalla
€90,673,000
- Business ID
- 2727327-9
- Fiscal year
- 2025
- Personnel
- 0
- 24
Oy Mankala Ab
Sähkön tuotanto vesivoimalla
€87,604,000
- Business ID
- 0158738-4
- Fiscal year
- 2025
- Personnel
- 0
- 25
Järvi-Suomen Energia Oy
Sähkön siirto
€86,613,000
- Business ID
- 0981408-6
- Fiscal year
- 2024
- Personnel
- 23
- 26
Porvoon Energia Oy
Sähkön kauppa
€62,811,000
- Business ID
- 0855859-4
- Fiscal year
- 2025
- Personnel
- 68
- 27
Kymenlaakson Sähköverkko Oy
Sähkön siirto
€62,192,000
- Business ID
- 2058585-1
- Fiscal year
- 2025
- Personnel
- 20
- 28
Kokkolan Energia Oy
Sähkön tuotanto uusiutumattomilla energialähteillä
€59,255,000
- Business ID
- 2276581-3
- Fiscal year
- 2024
- Personnel
- 91
- 29
Lappeenrannan Energiaverkot Oy
Sähkön jakelu
€58,894,000
- Business ID
- 1995405-8
- Fiscal year
- 2025
- Personnel
- 23
- 30
Kymenlaakson Sähkö Oy - Kymmenedalens El Ab
Sähkön kauppa
€54,996,000
- Business ID
- 0128951-2
- Fiscal year
- 2025
- Personnel
- 34
Revenue concentration
How much of the published sample belongs to the five largest entities?
The five largest entities account for 60.8 % of the published top-30 sample's combined revenue. Median revenue is €120.7M.
Ranks 1–5
60.8 %€6.5B
Ranks 6–10
20.1 %€2.2B
Ranks 11–30
19.0 %€2B
Shares describe the published top-30 sample, not official market shares for the entire market.
Market structure
Which activities make up the market?
Distribution of active legal entities by their current PRH main industry.
Sähkön tuotanto vesivoimalla
907
Sähkön kauppa
249
Sähkön tuotanto uusiutumattomilla energialähteillä
208
Sähkön siirto
126
Sähkön jakelu
104
Sähkön tuotanto tuulivoimalla
103
Muu sähkön tuotanto uusiutuvilla energialähteillä
40
Distribution of active legal entities by their current PRH main industry.
Report scope
Electricity companies cover the full electricity-market value chain here.
The report covers the core industries in electricity generation, transmission and distribution networks, electricity trade, and brokerage. Each row identifies the entity's activity.
PRH
Legal-entity view
Names, Business IDs, industry, and register status all refer to the same legal entity.
TOL
Versioned industry code
The classification version prevents identically numbered codes in old and new classifications from being mixed.
Methodology
How was the electricity-company top 30 built?
The report is a reproducible snapshot of DM Faster's comprehensive PRH-backed Finland company data. The industry-code version is retained with each code so identically numbered categories in old and new TOL classifications cannot be mixed.
1. Market definition
2,407 industry matches were selected from DM Faster company data using the correct code and TOL-version combination.
2. Active legal-entity population
After active-register and legal-entity checks, 1,737 entities remained in the market map.
3. Financial-data matching
101 entities had a latest comparable DM Faster revenue observation.
4. Publication
Legal entities were sorted by revenue, and the largest 30 were published with Business IDs, industries, and fiscal years.
How to read the dataset
- The report covers legal entities. Separate Business IDs in the same group remain separate.
- The ranking uses the latest comparable DM Faster revenue observation, with fiscal year shown on every row.
- Industry version and code are checked together. The numeric code alone is not enough to identify the category.
- DM Faster updates the market map as PRH register and classification data and new financial observations change.
Cite this research
A clear source for the original data.
DM Faster Data (2026). Finland's 30 largest electricity companies in 2026. https://dmfaster.com/research/electricity-companies-finland
Cite the findings with attribution.
You may cite findings and reproduce short excerpts when DM Faster is visibly credited and this report is linked. Republishing the full table, bulk reuse, and commercial redistribution require written permission from DM Faster.
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