The National Broadcasting Company (NBC) is an American English-language commercial broadcast television and radio network which is owned by Comcast through NBCUniversal. The network is headquartered at 30 Rockefeller Plaza in New York City, with additional major offices near Los Angeles (at 10 Universal City Plaza), and Chicago (at the NBC Tower). Along with ABC and CBS, NBC is one of the traditional "Big Three" American television networks.
NBC was founded in 1926 by the Radio Corporation of America (RCA), a then-subsidiary of General Electric (GE), making it the oldest major broadcast network in the United States. In 1932, GE was forced to sell RCA and NBC as a result of antitrust charges; in 1986, control of NBC passed back to GE through its $6.4 billion purchase of RCA, which sold off the entirety of NBC's radio assets. In 2003, French media Vivendi merged its assets with GE to form NBC Universal. Comcast purchased a controlling interest in the company in 2011, and acquired General Electric's remaining stake in 2013.