Mark Cuban (born July 31, 1958) is an American businessman, investor, film producer, author, television personality and philanthropist. He is the owner of the NBA's Dallas Mavericks, Landmark Theatres, and Magnolia Pictures, and the chairman of the HDTV cable network AXS TV. He is also a "shark" investor on the television series Shark Tank. In 2011, Cuban wrote an e-book, How to Win at the Sport of Business, in which he chronicles his life experiences in business and sports.