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Mast-sähkö Oy
OY
Active
Y-tunnus 2201527-0
Graniittitie 13A-1330, 00710
Helsinki
Electrical installation
· NACE 4321
Est. 2008
— employees
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Mast-sähkö Oy
Overview
Financials
People & ownership
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People & ownership
Management
Actively employed in the business
Name
Role
Member since
Current (1)
OO
Oliver Onni Ilmari Koskinen
Deputy Member
Deputy Member
2025
Former (1)
LO
Lasse Olavi Kallaskari
Audit
Audit
2008 – 2023
Board of directors
Non-executive oversight
Name
Role
Member since
Current (1)
MA
Mikael Arjakari
Board of Directors
2025
Former (2)
OM
Outi Marjukka Rintamäki
Board of Directors
2008 – 2025
PA
Pekka Arjakari
Chairperson
2008 – 2022
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
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Corporate hierarchy, parent and subsidiary network
