Mariusz Jan Kowalski is a private shareholder. Mariusz Jan Kowalski holds stakes in 2 companies, and roles in several others.

Companies Mariusz Jan Kowalski owns

Company	Stake
MKB BYGG AS	50.9%
MKB EIENDOM HADSEL AS	50.9%

Roles

Daglig leder

3 selskaper

MKB BYGG AS 912208885

MKB EIENDOM HADSEL AS 831253142

HADSELFJORD BYGG OG GLASS AS 938442983

Styremedlem

2 selskaper

MKB BYGG AS 912208885

MKB EIENDOM HADSEL AS 831253142

Styrets leder

1 selskap

HADSELFJORD BYGG OG GLASS AS 938442983

Active roles recorded in the Register of Business Enterprises / the Central Coordinating Register

Source: Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 03.10.2026.