Comcast Corporation is an American multinational telecommunications and mass media company. Originally founded in 1963, the company was re-incorporated in 1969 under its current name and in the years since has grown to become the largest broadcasting and cable television company in the world by revenue. Comcast owns a number of subsidiaries including NBCUniversal and DreamWorks Animation, employs 139,000 workers across the United States, and is headquartered in Philadelphia, Pennsylvania, U.S.