Question 1

What is the Y-tunnus number of Insinööritoimisto Ykkössähkö Oy?

Accepted Answer

Insinööritoimisto Ykkössähkö Oy is registered with PRH / YTJ under Y-tunnus 1531451-2.

Question 2

What is the revenue of Insinööritoimisto Ykkössähkö Oy?

Accepted Answer

Insinööritoimisto Ykkössähkö Oy reported revenue of EUR 488K in 2024.

Question 3

Who is the CEO of Insinööritoimisto Ykkössähkö Oy?

Accepted Answer

Antti Markus Vänttinen is Chief Executive Officer of Insinööritoimisto Ykkössähkö Oy, in role since 1999.

Question 4

Who is the chairman of Insinööritoimisto Ykkössähkö Oy?

Accepted Answer

Mauri Kalervo Vänttinen chairs the board of Insinööritoimisto Ykkössähkö Oy, in role since 1999.

Question 5

Where is Insinööritoimisto Ykkössähkö Oy headquartered?

Accepted Answer

Insinööritoimisto Ykkössähkö Oy's registered address is Leijukuja 1.

Name	Role	Member since
Current (3)
AM Antti Markus Vänttinen Chief Executive Officer	Chief Executive Officer	1999
UV Ulla-Maija Vänttinen Deputy Member	Deputy Member	1999
JT Jarmo Tauno Antero Hirvonen Audit	Audit	2025
Former (1)
PJ Pertti Juhani Koponen Audit	Audit	1999 – 2025

Name	Role	Member since
Current (1)
MK Mauri Kalervo Vänttinen	Chairperson	1999

Name	Role	Member since
Current (3)
AM Antti Markus Vänttinen Chief Executive Officer	Chief Executive Officer	1999
UV Ulla-Maija Vänttinen Deputy Member	Deputy Member	1999
JT Jarmo Tauno Antero Hirvonen Audit	Audit	2025
Former (1)
PJ Pertti Juhani Koponen Audit	Audit	1999 – 2025

Name	Role	Member since
Current (1)
MK Mauri Kalervo Vänttinen	Chairperson	1999

Insinööritoimisto Ykkössähkö Oy

People & ownership