8,065
Active legal entities
The starting population matching current main industry and active register status.
Largest Finnish engineering firms 2026
We ranked active companies in civil, structural, HVAC, electrical, and other technical design by their latest revenue observation.
DM Faster market map
8,065
Active legal entities
- 2,717
- 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 largest engineering firm in Finland is OX2 Construction AB filial i Finland (€5.4B).
Questions about the ranking
- What is the largest engineering firm in Finland?
- The largest engineering firm in this comparison is OX2 Construction AB filial i Finland. The rank uses the latest public revenue figure and covers the whole legal entity.
- How many companies were compared?
- DM Faster ordered 2,717 legal entities with a comparable revenue observation. This page publishes the largest 30.
- What does the ranking leave out?
- Architecture services (71110) and management consulting (70200) are excluded so the list describes technical design.
Legal-entity comparison
Largest Finnish engineering firms 2026
Every row shows rank, official legal entity, Finnish Business ID, current PRH main industry, fiscal year, personnel, and the DM Faster revenue observation.
OX2 Construction AB filial i Finland
€5.4BHelsinki
Destia Oy
€774.9MHelsinki
Etteplan Oyj
€361.4MLahti
Exyte Finland Oy
€300.3MHelsinki
Sweco Finland Oy
€295MHelsinki
Millog Oy
€264.1MTampere
AECOM Nordic AB, filial
€254.7MHelsinki
AFRY Finland Oy
€234.5MVantaa
Ramboll Finland Oy
€223.5MEspoo
Etteplan Finland Oy
€164.2MLahti
- 1
OX2 Construction AB filial i Finland
Muu rakennustekninen palvelu
€5,412,579,000
- Business ID
- 2620214-5
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 37
- 2
Destia Oy
Rakennetekninen palvelu
€774,906,000
- Business ID
- 2163026-3
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 1,743
- 3
Etteplan Oyj
Kone- ja prosessisuunnittelu
€361,417,000
- Business ID
- 0545456-2
- City
- Lahti
- Fiscal year
- 2025
- Personnel
- 3,846
- 4
Exyte Finland Oy
Muu rakennustekninen palvelu
€300,255,000
- Business ID
- 3432313-1
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 23
- 5
Sweco Finland Oy
Yhdyskuntasuunnittelu
€295,015,836
- Business ID
- 2661738-3
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 2,561
- 6
Millog Oy
Muu tekninen palvelu
€264,096,000
- Business ID
- 2051859-5
- City
- Tampere
- Fiscal year
- 2025
- Personnel
- 1,051
- 7
AECOM Nordic AB, filial
Maa- ja vesirakentamisen tekninen palvelu
€254,723,000
- Business ID
- 2062836-4
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 25
- 8
AFRY Finland Oy
Kone- ja prosessisuunnittelu
€234,504,000
- Business ID
- 0625905-6
- City
- Vantaa
- Fiscal year
- 2025
- Personnel
- 2,131
- 9
Ramboll Finland Oy
Yhdyskuntasuunnittelu
€223,499,000
- Business ID
- 0101197-5
- City
- Espoo
- Fiscal year
- 2025
- Personnel
- 2,141
- 10
Etteplan Finland Oy
Muu tekninen palvelu
€164,201,000
- Business ID
- 1538517-7
- City
- Lahti
- Fiscal year
- 2025
- Personnel
- 1,767
- 11
Mercury Engineering Finland Oy
Rakennetekninen palvelu
€151,962,000
- Business ID
- 3210210-8
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 41
- 12
Granlund Oy
Muu rakennustekninen palvelu
€141,914,000
- Business ID
- 1704694-5
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 1,394
- 13
A-Insinöörit Suunnittelu Oy
Rakennetekninen palvelu
€97,677,000
- Business ID
- 0211382-6
- City
- Tampere
- Fiscal year
- 2025
- Personnel
- 925
- 14
Mantsinen Group Ltd Oy
Kone- ja prosessisuunnittelu
€96,673,834
- Business ID
- 9081659-8
- City
- Ylämylly
- Fiscal year
- 2025
- Personnel
- 414
- 15
Rejlers Finland Oy
Kone- ja prosessisuunnittelu
€92,924,000
- Business ID
- 0765069-8
- City
- Mikkeli
- Fiscal year
- 2025
- Personnel
- 786
- 16
WSP Finland Oy
Yhdyskuntasuunnittelu
€78,679,261
- Business ID
- 0875416-5
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 731
- 17
Elomatic Consulting & Engineering Oy
Kone- ja prosessisuunnittelu
€73,191,000
- Business ID
- 1936067-1
- City
- Turku
- Fiscal year
- 2025
- Personnel
- 538
- 18
Verdis Oy
Yhdyskuntasuunnittelu
€70,093,394
- Business ID
- 2230771-6
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 496
- 19
Almaco Group Oy
Muu rakennustekninen palvelu
€54,097,000
- Business ID
- 0854684-1
- City
- Piispanristi
- Fiscal year
- 2024
- Personnel
- 191
- 20
Ramboll CM Oy
Muu rakennustekninen palvelu
€47,575,000
- Business ID
- 0692498-4
- City
- Espoo
- Fiscal year
- 2025
- Personnel
- 308
- 21
Europlan Engineering Oy
Kone- ja prosessisuunnittelu
€46,745,000
- Business ID
- 0828905-6
- City
- Raisio
- Fiscal year
- 2024
- Personnel
- 1
- 22
Cyient Oy Ab
Kone- ja prosessisuunnittelu
€41,247,000
- Business ID
- 1866176-3
- City
- Vaasa
- Fiscal year
- 2025
- Personnel
- 358
- 23
Accelleron Nordics Oy
Kone- ja prosessisuunnittelu
€40,472,000
- Business ID
- 3225654-5
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 57
- 24
Andritz Hydro Oy
Muu tekninen palvelu
€33,640,000
- Business ID
- 2152530-8
- City
- Tampere
- Fiscal year
- 2025
- Personnel
- 56
- 25
Sweco PM Oy
Muu rakennustekninen palvelu
€31,055,000
- Business ID
- 2635438-4
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 215
- 26
Luotea Kiinteistötekniikka Oy
Muu rakennustekninen palvelu
€30,641,000
- Business ID
- 3155933-3
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 176
- 27
FCG Rakennettu Ympäristö Oy
Yhdyskuntasuunnittelu
€30,502,000
- Business ID
- 3485116-1
- City
- Helsinki
- Fiscal year
- 2025
- Personnel
- 266
- 28
Fidelix Oy
Kone- ja prosessisuunnittelu
€28,823,000
- Business ID
- 1770269-0
- City
- Vantaa
- Fiscal year
- 2024
- Personnel
- 174
- 29
Sustera Oy
Muu rakennustekninen palvelu
€28,173,000
- Business ID
- 0905045-0
- City
- Helsinki
- Fiscal year
- 2024
- Personnel
- 249
- 30
JIS-Automation Oy
Sähkötekninen suunnittelu
€26,882,000
- Business ID
- 1849009-5
- City
- Pirkkala
- Fiscal year
- 2024
- Personnel
- 158
Revenue concentration
How much of the published sample belongs to the five largest entities?
The five largest entities account for 75.0 % of the published top-30 sample's combined revenue. Median revenue is €85.8M.
Ranks 1–5
75.0 %€7.1B
Ranks 6–10
12.0 %€1.1B
Ranks 11–30
13.0 %€1.2B
Shares describe the published top-30 sample, not official market shares for the entire market.
Market by city
Where are the industry's companies located?
Registered home cities of active legal entities in DM Faster's PRH-backed company data.
Helsinki
1,020
Espoo
543
Tampere
428
Vantaa
333
Turku
301
Oulu
231
Lahti
173
Pori
123
Jyväskylä
122
Kuopio
103
Registered home cities of active legal entities in DM Faster's PRH-backed company data.
Report scope
The list covers legal entities in technical design.
The report covers technical-design TOIMI4 codes 71121-71127 and 71129. Architecture firms and general management consulting are outside the list.
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 this 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
13,113 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, 8,065 entities remained in the market map.
3. Financial-data matching
2,717 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). Largest Finnish engineering firms 2026. https://dmfaster.com/research/largest-engineering-firms-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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