Mark Cuban is an American entrepreneur and investor, best known as the owner of the Dallas Mavericks, a professional basketball team in the NBA. He gained fame as a billionaire after selling his company, Broadcast.com, to Yahoo! in 1999 for $5.7 billion. Cuban is also a prominent figure on the television show Shark Tank, where he invests in various startups and shares his business expertise. In addition to his business ventures, Cuban is known for his outspoken personality and advocacy for various social issues. He has invested in numerous companies across different industries, including technology and entertainment. Cuban's success and influence have made him a well-respected figure in the world of business.