Jan-Magne Mathisen is a private shareholder. Jan-Magne Mathisen holds a stake in 1 company, and roles in several others.

Companies Jan-Magne Mathisen owns

Company	Stake
JMM BYGG AS	51.0%

Roles

Daglig leder

1 selskap

JMM BYGG AS 923239693

Styrets leder

1 selskap

JMM BYGG AS 923239693

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.