Marcus Tiedemann Westbye is a private shareholder. Marcus Tiedemann Westbye holds a stake in 1 company, and roles in several others.

Companies Marcus Tiedemann Westbye owns

Company	Stake
Master Holding AS	98.5%

Roles

Varamedlem

3 selskaper

Master Holding AS 934204573

GRAPPA MUSIKKFORLAG AS 940354226

OSLO LYDSTUDIO AS 958193327

Styremedlem

1 selskap

NORSK BIBLIOTEKFORENING, AVDELING OSLO 919139765

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.