John-Herstein Steinsvik is a private shareholder. John-Herstein Steinsvik holds a stake in 1 company.

Companies John-Herstein Steinsvik owns

Company	Stake
TNB FINNSNES AS	10.0%

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