PORR AG Announces Resignation of Thomas Stiegler, Effective 31 January 2021

Porr AG, formerly known as Allgemeine Baugesellschaft A Porr AG, is an Austrian holding and construction company. The Company provides services diversified into building construction, civil engineering, infrastructure construction, project development and environmental engineering. The Company has a number of offices located in Central, Eastern and South-Eastern Europe. Its services range from residential construction to infrastructure projects. The building construction services cover offices, hotels, universities and football stadiums, among others. The civil engineering services cover tunnels, bridges, railways and power plants, among others. The infrastructure construction services cover traffic infrastructure. The project development services are carried out by the Company's subsidiaries Strauss & Partner Development GmbH, PORREAL Immobilien Management GmbH and UBM Realitaetenentwicklung AG. The environmental engineering services include design, financing and operation of plants.