Waagner-Biro Aktiengesellschaft (Waagner-Biro) is an investment holding company engaged in providing mechanical and structural engineering solutions. It offers a wide range of services including bridge engineering, stage engineering, steel-glass engineering, mechanical engineering, and also provides installation and maintenance. Waagner-Biro operates across Europe, Asia, and the Gulf regions through its subsidiaries and affiliates. Its key subsidiaries include Waagner-Biro Stahlbau AG, Waagner-Biro Stage Systems Group, and Qualter Hall & Co Limited. The company is headquartered at Vienna, Austria.