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Tempest Oy
OY
Active
Y-tunnus 0710749-2
Myrskyläntie 95, 16200
Artjärvi
Activities of head offices
· NACE 7010
Est. 1988
— employees
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Tempest Oy
Overview
Financials
People & ownership
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People & ownership
Management
Actively employed in the business
Name
Role
Member since
Current (4)
EM
Esa Mikko Siirilä
Person with significant control
Person with significant control
1988
MJ
Matti Juhani Ryhänen
Person with significant control
Person with significant control
1988
PA
Perttu Antero Pyykkönen
Person with significant control
Person with significant control
1988
TA
Timo Antti Ilmari Sipiläinen
Person with significant control
Person with significant control
1988
Former (1)
TA
Tarja Anneli Havukainen
Deputy Member
Deputy Member
2020 – 2023
Board of directors
Non-executive oversight
Name
Role
Member since
Current (2)
MJ
Matti Juhani Ryhänen
Board of Directors
2020
TA
Timo Antti Ilmari Sipiläinen
Chairperson
2020
Former (4)
MJ
Matti Juhani Ryhänen
Board of Directors
1988 – 2020
PA
Perttu Antero Pyykkönen
Board of Directors
1988 – 2020
EM
Esa Mikko Siirilä
Board of Directors
1988 – 2020
TA
Timo Antti Ilmari Sipiläinen
Chairperson
1988 – 2020
Shareholders
As of last annual report
No shareholder data available.
Beneficial ownership (UBO) data access is restricted in Denmark as of September 2025 per the EU 6th AML Directive.
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Headline figures, risk assessment and company summary
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Revenue, EBITDA, balance sheet and 5-year trend
Related companies →
Corporate hierarchy, parent and subsidiary network