Comcast is a cable television, internet, and phone service provider founded in 1963 that has grown significantly through acquisitions. It now has over 21 million cable customers, 20 million internet customers, and 10 million phone customers, and owns NBCUniversal. Comcast has seen its stock price and revenue increase dramatically since 1999 through both organic growth and acquisitions, including NBCUniversal in 2011. It maintains a dominant market position through horizontal and vertical monopolies in certain regions and the inelastic demand for its services.