Arnstein Rustberggard is a private shareholder with an estimated portfolio value of NOK 178,000. Arnstein Rustberggard holds stakes in 4 companies, and roles in several others.

Estimated portfolio value

NOK 178,000

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

Companies Arnstein Rustberggard owns

Company	Stake	Value (est.)
SONAR INVEST AS	50.0%	–
SONAR INVEST AS	40.9%	–
NORWEGIAN BLOCK EXCHANGE AS	0.3%	NOK 173,000
ARES DETECTION AS	0.2%	–

Roles

Styremedlem

1 selskap

ARES DETECTION AS 813291622

Styrets leder

1 selskap

SONAR INVEST AS 982778301

Varamedlem

1 selskap

TREKANTEN EIENDOM AS 981883608

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.