Question 1

What is the Y-tunnus number of T-Fyster Oy?

Accepted Answer

T-Fyster Oy is registered with PRH / YTJ under Y-tunnus 3492879-8.

Question 2

What is the revenue of T-Fyster Oy?

Accepted Answer

T-Fyster Oy reported revenue of EUR 69K in 2025.

Question 3

Who is the CEO of T-Fyster Oy?

Accepted Answer

Marjut Katariina Hämäläinen is Deputy Member of T-Fyster Oy, in role since 2025.

Question 4

Who is the chairman of T-Fyster Oy?

Accepted Answer

Tatu Petteri Hämäläinen chairs the board of T-Fyster Oy, in role since 2025.

Question 5

Where is T-Fyster Oy headquartered?

Accepted Answer

T-Fyster Oy's registered address is Kiertokoulu 4.

Person	Role here	Other companies
Marjut Katariina Hämäläinen	Deputy Member	0 companies
Tatu Petteri Hämäläinen	Board of Directors	0 companies

T-Fyster Oy

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