Jon Blytt Hammarstrøm is a private shareholder with an estimated portfolio value of NOK 10.7m. Jon Blytt Hammarstrøm holds a stake in 1 company, and roles in several others.

Estimated portfolio value

NOK 10.7m

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

Companies Jon Blytt Hammarstrøm owns

Company	Stake	Value (est.)
H2 BYGGETEKNIKK AS	78.3%	NOK 10.7m

Roles

Styremedlem

1 selskap

GRAMSTØLEN GRENDALAG SA 814372782

Styrets leder

1 selskap

H2 BYGGETEKNIKK AS 989579592

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.