Stefan Papirow

Dingfelder + Hadler AG specializes in safe smoke extraction and contemporary ventilation solutions. The private company is based in Ammersbek, Germany. The German company also offers skylight solutions and are a reliable partner for RWA systems, elevator shaft ventilation, natural building ventilation, and protective technology and gate drives. The CEOs of the company are Christoph Kern, Dirk Dingfelder.

BTG Beteiligungsgesellschaft Hamburg mbH is a regional private equity firm established in 1970 and located in Hamburg in northern Germany. BTG's shareholders and investors are banks, including international banking groups based in Germany and local savings banks. The chief purpose of BTG is to foster regional economic development, and to maintain and develop employment opportunities in and around Hamburg.