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Terawatt Oy
OY
Active
Y-tunnus 1912843-4
Tiilipojanlenkki 9, 01720
Vantaa
Electrical installation
· NACE 4321
Est. 2004
— employees
www.terawatt.fi
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Terawatt Oy
Overview
Financials
People & ownership
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People & ownership
Management
Actively employed in the business
Name
Role
Member since
Current (2)
LK
Lasse Kalervo Impiö
Chief Executive Officer
Chief Executive Officer
2022
HJ
Hannes Juhani Kokko
Confidential Clerk
Confidential Clerk
2018
Former (5)
OA
Osmo Antero Valovirta
Audit
Audit
2022 – 2023
ES
Erkki Samuli Nissilä
Confidential Clerk
Confidential Clerk
2018 – 2022
JT
Jussi Tapani Holma
Chief Executive Officer
Chief Executive Officer
2018 – 2022
PE
Perttu Einari Ervasti
Confidential Clerk
Confidential Clerk
2018 – 2022
JP
Jari Petteri Karppinen
Audit
Audit
2018 – 2022
Board of directors
Non-executive oversight
Name
Role
Member since
Current (2)
KM
Kari Matti Antero Kohvakka
Chairperson
2024
AJ
Antti Juhani Heinola
Board of Directors
2024
Former (4)
SK
Sari Kristiina Kaikkonen
Board of Directors
2021 – 2023
JA
Jussi Aimo Samuli Aine
Chairperson
2018 – 2020
SM
Samuli Markus Paakki
Board of Directors
2020 – 2024
TJ
Timo Jaakko Pekkarinen
Board of Directors
2018 – 2020
Shareholders
As of last annual report
Shareholder
Type
Ownership
Votes
Since
We-Group Oy
Company
100%
100%
2023
Beneficial ownership (UBO) data access is restricted in Denmark as of September 2025 per the EU 6th AML Directive.
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Revenue, EBITDA, balance sheet and 5-year trend
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Corporate hierarchy, parent and subsidiary network