Michael Hartono and his brother Robert Budi are the owners of the Indonesian company, Djarum, a globally successful clove cigarette manufacturer. They inherited the company following the death of their father, Oei Wie Gwan, in 1963. Since then, the brothers have expanded the brand to international markets, despite a 2009 U.S. law banning their sale in the United States. According to Forbes magazine, the brothers had a combined net worth of $15 billion at the end of 2012.
While Djarum is successful, Hartono earned his place on the List of Billionaires primarily through his various business interests in Bank Central Asia, among others. He also controls a luxury shopping mall, and other buildings in Jakarta.
His net worth often lists him as the richest man in Indonesia. According to Forbes, Hartono has a net worth of $8.7 billion, as of January 2015.