Who owns KOSTR INSTALLASJON AS?

JAN GRØNBERG EFTF. AS is the largest registered owner, with 40.0%.

Who is the general manager of KOSTR INSTALLASJON AS?

Christian Seth is registered as general manager of KOSTR INSTALLASJON AS.

KOSTR INSTALLASJON AS has its business address in Rygge.

Electrical installation

Org. no. 835727092 Limited company (AS) Moss Incorporated 2025 Active

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Incorporated 2025

Share capital NOK 30,000

Daglig lederChristian Seth

Styrets lederJoacim Flesjø Grønberg

StyremedlemChristian Seth

StyremedlemAndre Steinum

Name	Stake	Shares	Year
JAN GRØNBERG EFTF. AS	40.0%	12000.000000	2025
CHRISTIAN SETH	30.0%	9000.000000	2025
ANDRE STEINUM	30.0%	9000.000000	2025

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

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