Michael Kalt

Part of Alltours Flugreisen GmbH, BYE.bye GmbH is a travel agency that provides travel agency services. The company is based in Dusseldorf, Germany. The CEOs of the German company are Michael Kalt, Willi Verhuven.

PLATH Corporation GmbH provides solutions for radio reconnaissance, including detection, locating signal analysis, interception and recording services. The private company is based in Hamburg, Germany. and has subsidiaries in Switzerland, France and Germany. The CEOs are Michael Kalt, Nico Scharfe, Hinrich Brüggmann. The German company was founded in 1954.

Hotelplan Holding AG engages in the acquisition and management of participating interests in firms. The company was founded on April 13, 1981 and is headquartered in Glattbrugg, Switzerland.

Amadeus Leisure IT GmbH provides content and software solutions for multimedia applications based on geocoded content. The software products and content offering targets the travel industry, the real estate segment and location based service providers on mobile platforms. It markets business solutions in the travel segment from travel information on customer web sites, to off-the-shelf CRM applications for business clients and internet based booking engines allowing travelers to book online. The city segment is devoted to the growing market for applications in the areas of location based services and real estate on the internet. The company was founded in 1991 and is headquartered in Aachen, Germany.