Chemical tanker powerhouse Stolt-Nielsen has snapped up more than 3.2m shares in rival Odfjell, taking its overall holding to 13.6%.

Stolt said in a securities filing with the Oslo Stock Exchange on Monday that it now had more than 8.23m shares, pushing it past a required disclosure threshold that comes with 10% of the stock.

Stolt operates the world’s largest fleet of chemical tankers.