Grzegorz Adam Sowinski is a private shareholder. Grzegorz Adam Sowinski holds a stake in 1 company.

Companies Grzegorz Adam Sowinski owns

Company	Stake
GROUTING SERVICE AS	70.0%

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