What is the Y-tunnus number of First Whistle Oy?

First Whistle Oy is registered with PRH / YTJ under Y-tunnus 2248102-8.

What is the revenue of First Whistle Oy?

First Whistle Oy reported revenue of 1,2 milj. € in 2025.

Matias Arttu Johannes Vesterinen is the CEO of First Whistle Oy, in role since 2026.

First Whistle Oy's registered address is Annankatu 27-A.

OYActive

Y-tunnus 2248102-8Annankatu 27A, 00100 HelsinkiBusiness and other management consultancy activities· NACE 7020Est. 2009 · 17 years old— employeesfi.falcony.io

Actively employed in the business

Name	Role	Member since
Current (2)
OA Okko Arimo Kouvalainen Deputy Member	Deputy Member	2026
MA Matias Arttu Johannes Vesterinen Chief Executive Officer	Chief Executive Officer	2026

Former (4)


ME Milla Erika Heiskanen Chief Executive Officer	Chief Executive Officer	2023 – 2026
MI Mika Ilmari Puuska Audit	Audit	2011 – 2023
JA Jari Antero Salo Deputy Chief Executive Officer	Deputy Chief Executive Officer

Non-executive oversight

Name	Role	Member since
Current (1)
MA Matias Arttu Johannes Vesterinen Board of Directors	Board of Directors	2026

Former (5)


ME Milla Erika Heiskanen Chairperson	Chairperson	2020 – 2020
MM Mitti Maria Storckovius Board of Directors	Board of Directors	2019 – 2026
MP Mikko Petteri Laine Board of Directors	Board of Directors	2018 – 2019
AK Anja Kaarina Kajander Chairperson	Chairperson	2018 – 2020
MH Mikko-Pekka Hanski Chairperson	Chairperson	2020 – 2026

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.