Stein Ole Onsøyen is a private shareholder. Stein Ole Onsøyen holds a stake in 1 company, and roles in several others.

Companies Stein Ole Onsøyen owns

Company	Stake
SOO INVEST AS	100.0%

Roles

Styremedlem

3 selskaper

ROTOR SYSTEMS AS 829031302

ROTOR OFFSHORE AS 992351764

ROTOR NEWCO HOLDING AS 938366608

Styrets leder

1 selskap

SOO INVEST AS 989168762

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.