Naspers missing from Top Thirty ranking by Christo Volschenk in Uncategorized 12 May 2015 ZenithOptimedia, the Düsseldorf-based agency for analyzing the effectiveness of marketing spend, released its latest “Top Thirty Global Media Owners” ranking yesterday (here). The agency is active around the world and a This article is only available to AIM Group clients. Please subscribe now or log in to view. Share Market statisticsnasperszenithoptimedia Christo Volschenk Christo Volschenk is managing editor of the news on Aimgroup.com and our senior analyst covering Naspers. He brings more than 31 years of experience in business journalism to the team - the last 18 years focused on classifieds and e-commerce. Apart from working closely with the AIM Group, Christo is a freelance journalist, content manager, and copy editor. Before branching out on his own, he spent 15 years with Naspers in South Africa as journalist, economics editor and online project manager. He now spends most his day editing the news reported by 23 colleagues in 23 countries from his base in Stuttgart, Germany.