Claim: Mark Cuban is on Shark Tank.

Mark Cuban -LRB- born July 31 , 1958 -RRB- is an American businessman , investor , author , television personality , and philanthropist . He is the owner of the NBA 's Dallas Mavericks , co-owner of 2929 Entertainment and chairman of the AXS TV . He is also one of the main `` shark '' investors on the ABC reality 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 .