Øistein Antonsen is a private shareholder with an estimated portfolio value of NOK 27.8m. Øistein Antonsen holds stakes in 4 companies, and roles in several others.

Estimated portfolio value

NOK 27.8m

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

Companies Øistein Antonsen owns

Company	Stake	Value (est.)
NETKEM AS	40.0%	NOK 18.6m
OSPEHOLMEN UTVIKLING AS	39.9%	NOK 9.1m
OSPEHOLMEN UTVIKLING AS	0.1%	NOK 29,000
NETKEM AS	0.0%	NOK 21,000

Roles

Styrets leder

3 selskaper

OSPEHOLMEN UTVIKLING AS 986389229

NETKEM AS 983922333

LARUAN AS 994758721

Daglig leder

2 selskaper

OSPEHOLMEN UTVIKLING AS 986389229

LARUAN AS 994758721

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.