Stobart Group Limited operates in five segments. The Stobart Air segment specializes in operation of commercial airports, including air freight. The Stobart Biomass segment specializes in supply of sustainable biomass for the generation of renewable energy. The Stobart Transport & Distribution segment specializes in contract logistics, including road haulage, rail freight, ports handling and warehousing. The Stobart Estates segment specializes in management, development and realization of Group land and buildings assets. Stobart Estates owns a diverse portfolio of properties. The Stobart Infrastructure & Civil Engineering segment specializes in delivering internal and external infrastructure and development projects, including rail network operations. On February 28, 2012, it acquired the WADI Properties Limited. On May 19, 2011, it acquired the remaining 50% of the voting rights of Stobart Biomass Products Limited.