Arnt Marius By is a private shareholder with an estimated portfolio value of NOK 1.2m. Arnt Marius By holds stakes in 2 companies, and roles in several others.

Estimated portfolio value

NOK 1.2m

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

Companies Arnt Marius By owns

Company	Stake	Value (est.)
OPTITUNING AS	100.0%	NOK 765,000
ARNHEIM AS	100.0%	NOK 416,000

Roles

Styrets leder

3 selskaper

OPTITUNING AS 897380552

ARNHEIM AS 928179273

OPTITUNING TRONDHEIM AS 924952938

Daglig leder

2 selskaper

OPTITUNING AS 897380552

ARNHEIM AS 928179273

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.