Marius Rostock is a private shareholder with an estimated portfolio value of NOK 33.5m. Marius Rostock holds stakes in 2 companies, 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 Marius Rostock owns

Company	Stake	Value (est.)
ROSMA AS	100.0%	NOK 32.9m
ASCENIUM HOLDING AS	0.3%	NOK 552,000

Roles

Styrets leder

4 selskaper

BYGGRO AS 912017966

NYTTHUS AS 922530815

ROSMA AS 992007613

MIKROSEMENT OG DEKORPUSS AS 918837906

Daglig leder

3 selskaper

BYGGRO AS 912017966

BORØY NÆRINGSEIENDOM AS 929223640

MIKROSEMENT OG DEKORPUSS AS 918837906

Styremedlem

3 selskaper

BORØY NÆRINGSEIENDOM AS 929223640

HVALSTAD TEKNOLAB 913350561

BORØY TENNISFORENING 921734603

Innehaver

1 selskap

MARIUS ROSTOCK 980439798

Varamedlem

1 selskap

CAFERO AS 899004612

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.