SIRI GREFTEGREFF NØSTBERG is a private shareholder with an estimated portfolio value of NOK 20.7m. SIRI GREFTEGREFF NØSTBERG har eierandeler i 1 selskap.

Estimated portfolio value

NOK 20.7m

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

Selskaper SIRI GREFTEGREFF NØSTBERG eier

Company	Stake	Value (est.)
WATT HOLDING AS	33.3%	NOK 20.7m

Source: Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 15.06.2026.