John Fredriksen is about to launch a mandatory offer to buy all the shares he does not already own in Norwegian VLGC owner Avance Gas.

The offer, which is due to be submitted at some point next month, was automatically triggered after Fredriksen’s private outfit Hemen Holding increased its stake in Avance.

According to a regulatory filing on the Oslo Stock Exchange on Friday, Hemen bought 127,207 Avance shares to increase its shareholding in the company to 32.78%.