Mark Scheinberg

Mark Scheinberg cofounded PokerStars with his father, Isai, and built it into the world's biggest online poker company before cashing out in 2014.Scheinberg, who owned 75% of Rational Group at the time, pocketed more than $3 billion from the sale.He helped launch PokerStars in 2001, at age 28, and benefited tremendously from the poker boom that soon swept the U.S. and the rest of world.Scheinberg is investing some of the proceeds in Madrid, where he is helping restore seven historic buildings for commercial and residential use.In 2018, Scheinberg bought a stake in the Ritz-Carlton Yacht Collection from majority owner, private equity firm Oaktree Capital.He also owns the Thompson Toronto hotel in Canada, which is set to undergo extensive renovations in 2019.