Sylvelin Hartjen is a private shareholder. Sylvelin Hartjen holds stakes in 3 companies.

Companies Sylvelin Hartjen owns

Company	Stake
GRITERA VENTURE AS	0.8%
GRITERA VENTURE AS	0.2%
AUK ECO AS	0.1%

Source: Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 03.10.2026.