Stein Ole Onsøyen is a private shareholder with an estimated portfolio value of NOK 33.5m. Stein Ole Onsøyen holds a stake in 1 company, and roles in several others.

Estimated portfolio value

NOK 33.5m

The sum of estimated values across all known holdings in Norwegian AS/ASA companies

Companies Stein Ole Onsøyen owns

Company	Stake	Value (est.)
SOO INVEST AS	100.0%	NOK 33.4m

Roles

Styremedlem

3 selskaper

ROTOR SYSTEMS AS 829031302

ROTOR OFFSHORE AS 992351764

ROTOR AQUA AS 835506762

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 02.09.2026.