Mary Sylvia Olsen is a private shareholder. Mary Sylvia Olsen holds a stake in 1 company.

Companies Mary Sylvia Olsen owns

Company	Stake	Value (est.)
PHARMASUM THERAPEUTICS AS	1.3%	–

Source: Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 02.09.2026.