Martin Grønberg is a private shareholder with an estimated portfolio value of NOK 1.0m. Martin Grønberg holds stakes in 3 companies, and roles in several others.

Estimated portfolio value

NOK 1.0m

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

Companies Martin Grønberg owns

Company	Stake	Value (est.)
M & M MASKIN AS	50.0%	NOK 174,000
WALBERG MARINESERVICE & CO AS	30.0%	NOK 651,000
WALBERG MARINESERVICE & CO AS	10.0%	NOK 217,000

Roles

Daglig leder

1 selskap

WALBERG MARINESERVICE & CO AS 915430082

Styremedlem

1 selskap

WALBERG MARINESERVICE & CO AS 915430082

Styrets leder

1 selskap

M & M MASKIN AS 933574156

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.