3Karl Wlaschek –$4.4 Billion
The supermarket chain Billa is found all over the world and Karl Wlaschek is its founder.
But that is not the main source of his wealth. In 1996, he sold Billa for $1.1 billion from the 1996 to the German REWE Group.
That money he used to invest in prime Viennese real estate. So, with that $1.1 billion, he bought hotels, palaces and historic buildings.
In 1997, his fortune became almost quintuple than it was when he sold Billa.
Today he owns KWPS Immobilien GmbH that has about 250 properties and is one of the largest private real estate owners in Austria.
At this moment his net worth is estimated at $ 4.4 Billion.
