What is the Y-tunnus number of Mastervent Oy?

Mastervent Oy is registered with PRH / YTJ under Y-tunnus 0936675-4.

What is the revenue of Mastervent Oy?

Mastervent Oy reported revenue of EUR 2,1M in 2025.

Pertti Tapani Tolonen is the CEO of Mastervent Oy, in role since 1994.

Karri Jaakko Kuula chairs the board of Mastervent Oy, in role since 1999.

Mastervent Oy's registered address is Varikkokuja 4.

OYActive

Y-tunnus 0936675-4Varikkokuja 4, 03100 NummelaAll other professional, scientific and technical activities n.e.c.· NACE 7499Est. 1993 · 32 years old— employeeswww.mastervent.fi

Actively employed in the business

Name	Role	Member since
Current (3)
PT Pertti Tapani Tolonen Chief Executive Officer	Chief Executive Officer	1994
MV Matti Viljami Valpas Deputy auditor	Deputy auditor	2023
MS Marko Sakari Pöntinen Audit	Audit	2023
Former (4)
KH Katja Helena Hanski Audit	Audit	2021 – 2023
RP Risto Pertti Juhani Selinheimo Audit	Audit	2009 – 2021
TH Tarja Hellevi Tani Confidential Clerk	Confidential Clerk	2009 – 2020
EJ Esa Jussi Tani Confidential Clerk	Confidential Clerk	2009 – 2020

Non-executive oversight

Name	Role	Member since
Current (2)
JK Jessi Katriina Suikkanen Board of Directors	Board of Directors	2021
KJ Karri Jaakko Kuula Chairperson	Chairperson	1999
Former (1)
TJ Tero Jukka Taneli Tani Board of Directors	Board of Directors	1999 – 2021

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. Learn more.