Petroplus Holdings AG was Europe's largest independent oil refiner by capacity. When, the now defunct company, was first formed in 1993 it was known as Petroplus International N.V. being based in the Netherlands. In August 1998, it was listed on the Amsterdam Stock Exchange. In April 2005, it was delisted from the Euronext Amsterdam stock exchange when the company was acquired by a holding company. In November 2006, the company went public on the Swiss Stock Exchange.