Siri Greftegreff Nøstberg is a private shareholder. Siri Greftegreff Nøstberg holds a stake in 1 company, and roles in several others.

Companies Siri Greftegreff Nøstberg owns

Company	Stake
WATT HOLDING AS	33.3%

Roles

Styrets leder

2 selskaper

AS WATT 958862431

WATT HOLDING AS 988990442

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.