Klemens Hallmann is an Austrian entrepreneur and investor. He is founder and sole owner of Hallmann Corporate Group, one of the larger Austrian companies, specialized in sales, renovation and development of real estate projects, in addition to a wide-ranging portfolio of investments including finance and film production. With a net worth of more than 1.7 billion Euros, Hallmann was ranked number 31 on the 100 wealthiest Austrians list made by the renowned magazine "trend premium" in 2023.