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Onnium Oy
OY
Active
Y-tunnus 3392253-8
Viljandi Estonia
Construction of residential and non-residential buildings
·
NACE 4100
Est. 2023 · 2 years old
— employees
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Finland
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Companies
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Construction of residential and non-residential buildings
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Onnium Oy
Overview
Financials
People & ownership
Related companies
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People & ownership
Management
Actively employed in the business
Name
Role
Member since
Current (1)
SK
Sandris Klavins
Deputy Member
Deputy Member
2025
Former (4)
YM
Yrysbek Masirov
Deputy Member
Deputy Member
2024 – 2025
HM
Heidi Maarit Kaarttinen
Chief Executive Officer
Chief Executive Officer
2023 – 2024
JL
Jüri Laube
Deputy Member
Deputy Member
2025 – 2025
JM
Juuli Maarit Harka
Deputy Member
Deputy Member
2023 – 2024
Board of directors
Non-executive oversight
Name
Role
Member since
Current (1)
MM
Marius Metsaots
Board of Directors
Board of Directors
2025
Former (2)
HM
Heidi Maarit Kaarttinen
Board of Directors
Board of Directors
2023 – 2024
BK
Bakyt Kyiamidinov
Board of Directors
Board of Directors
2024 – 2025
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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Revenue, EBITDA, balance sheet and 5-year trend
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Corporate hierarchy, parent and subsidiary network