📢 We Are Proud to Announce Our Official Representation Partnership in Türkiye with Messe Muenchen GmbH and GHM Gesellschaft für Handwerksmessen mbH As of May 15, 2026, Sigma Expo Group Istanbul Exhibition Services Ltd. is pleased to announce that it has established an official representation partnership in Türkiye with Messe München GmbH and GHM (Gesellschaft für Handwerksmessen mbH). Sigma Expo Group Istanbul has become one of Messe München’s two official representatives in