Sirko Manthei is a private shareholder with an estimated portfolio value of NOK 1.2m. Sirko Manthei holds a stake in 1 company, and roles in several others.

Estimated portfolio value

NOK 1.2m

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

Companies Sirko Manthei owns

Company	Stake	Value (est.)
MAXINVEST AS	100.0%	NOK 1.2m

Roles

Daglig leder

1 selskap

MAXINVEST AS 994600508

Styrets leder

1 selskap

MAXINVEST AS 994600508

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.