GYLDENDAL ASA is listed on Oslo Stock Exchange and is the parent company in the Gyldendal Group. The largest owner is Erik Must AS. Our headquarters are on Sehested’s square in downtown Oslo. Gyldendal is Norway’s largest book group with leading businesses in all parts of the value chain; publishing, distribution and trade. Postboks 6860 St. Olavs plass, OSLO, Oslo, Norway.