Jan Groos Helmer is a private shareholder. Jan Groos Helmer holds stakes in 5 companies.

Companies Jan Groos Helmer owns

Company	Stake
AMERT AS	100.0%
TREMA AS	90.0%
ESSLIA AS	16.7%
TREMA AS	10.0%
AS ESSDAL	2.3%

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