Mangata Holding S.A. (WSE:MGT) is planning to sell its entire stake in Techmadex Spólka Akcyjna (WSE:TDX). Mangata said that corporation of several years between Mangata and Techmadex has not brought the desired results and the development plans are headed in different directions. Mangata's Management Board submitted to the Techmadex to include provision for buy back of Mangata's shares.