Martin Grønberg is a private shareholder with an estimated portfolio value of NOK 754,000. Martin Grønberg holds stakes in 3 companies, and roles in several others.

Estimated portfolio value

NOK 754,000

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 219,000
WALBERG MARINESERVICE & CO AS	30.0%	NOK 401,000
WALBERG MARINESERVICE & CO AS	10.0%	NOK 134,000

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 02.09.2026.