16/05/2011 (Agence Europe) - Merger: GWH Gashandel/ZMB. On Monday 16 May, the European Commission gave its blessing to a planned merger whereby ZMB (Schweiz) AG (Switzerland), which is owned by the Gazprom group (Russia), plans to take control of all of the company GWH Gashandel GmbH (Austria). ZMB (Schweiz) AG is active in trading in natural gas. Gazprom is a vertically integrated group made up of businesses whose main activities include the exploration, production, processing, transport...