What is the Y-tunnus number of Sioma Oy?

Sioma Oy is registered with PRH / YTJ under Y-tunnus 1094069-6.

What is the revenue of Sioma Oy?

Sioma Oy reported revenue of 2,2 milj. € in 2025.

Sioma Oy employs 19 people as of the latest annual report.

Petri Ensio Valtonen is the CEO of Sioma Oy, in role since 1998.

Tiina Susanna Koppinen chairs the board of Sioma Oy, in role since 2026.

Sioma Oy's registered address is Schaumanintie 34.

OYActive

Y-tunnus 1094069-6Schaumanintie 34, 57230 SavonlinnaElectrical installation· NACE 4321Est. 1997 · 28 years old19 employeeswww.sioma.fi

Actively employed in the business

Name	Role	Member since
Current (3)
TM Tuula Marjukka Haataja Deputy Member	Deputy Member	2026
MT Matti Tapani Pirttijärvi Confidential Clerk	Confidential Clerk	2026
PE Petri Ensio Valtonen Chief Executive Officer	Chief Executive Officer	1998

Former (3)


TI Tuomas Ilari Hynönen Confidential Clerk	Confidential Clerk	2013 – 2021
HO Harri Olavi Jylhä Audit	Audit	2020 – 2023
AK Anne Kristiina Kymäläinen

Non-executive oversight

Name	Role	Member since
Current (2)
MP Mikko Pekka Sahikallio Board of Directors	Board of Directors	2026
TS Tiina Susanna Koppinen Chairperson	Chairperson	2026

Former (3)


MT Matti Tapani Pirttijärvi Chairperson	Chairperson	2018 – 2026
PO Pasi Olavi Raninen Board of Directors	Board of Directors	2018 – 2026
PE Petri Ensio Valtonen Board of Directors	Board of Directors	2018 – 2026

As of last annual report

No shareholder data available.

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