3U 

Founded in 1997 and based in Marburg, Germany, 3U Holding AG engages in the domestic and international sale of plumbing, heating, and air conditioning (SHAC) products. The company's activities are structured across three distinct segments: Information and Telecommunications Technology (ITC), Renewable Energies, and Sanitary, Heating and Air Conditioning Technology (SHAC). Under its ITC division, 3U Holding delivers a comprehensive range of services. This includes various telecommunication offerings like call-by-call, pre-selection, call-through, and voice termination, alongside extensive data center solutions such as managed IT services, collocation, and infrastructure-as-a-service (IaaS). The segment also manages network operations and installation facilities, develops and commercializes cloud-based CRM and ERP software, and deals in IT licenses. The Renewable Energies segment is dedicated to sustainable power generation. This involves developing wind power projects and producing electricity through its proprietary wind and solar energy plants. Lastly, the SHAC segment supplies a wide array of sanitary, heating, and air conditioning products. These goods are primarily distributed through online retail platforms to a diverse customer base, including wholesalers, skilled tradespeople, and individual home improvers. Additionally, this division undertakes the installation of air conditioning components in buildings.