Austrian billionaire and businessman Johann Graf has an estimated net worth of $9.16 billion in January 2018. Considered as one of the wealthiest persons in Austria, Johann Graf earned most of his net worth for being the founder as well as majority owner of Novomatic Group of companies. Today, the company operates in 32 countries and exports devices to over 70 countries worldwide. As of 2011, the company's revenue is estimated to be around $4.3 billion, and currently, it hires approximately 18,000 employees.

It was in 1974 when his professional career started. He founded Gerhard Brodnik the Brodnik & Graf GmbH which specialized in importing Belgian pinball machines which were set up in brothels, cafes and pubs. Today, the company operates in around 1,200 sports betting and gaming venues as well as electronic casinos.

Currently divorced, Johann Graf lives in Baden near Vienna. He has three children and the eldest serves as Novomatic AG's Chief Technology Officer.