Castellum increases its holding in Entra PR Newswire GÖTEBORG, Sweden, Feb. 23, 2021 GÖTEBORG, Sweden , Feb. 23, 2021 /PRNewswire/ -- Castellum Aktiebolag (publ) ("Castellum") has on 23 February 2021 acquired 2,298,504 shares in Entra ASA ("Entra"). Following the acquisition, Castellum holds 18,225,000 shares, corresponding to 10.0065% of the shares and votes in Entra. "Our shareholding in Entra has so far been a good investment and we still see the company and Norway as interesting to invest...