On November 1, 1931, the "Daily News" sold WMAQ to the National Broadcasting Company. The arrangement originally began as NBC become a partner in the station, co-owned with the "Daily News". In May of the next year, NBC moved the station from the Daily News Building to the Merchandise Mart, where it had newly built a broadcasting center in 1930. WMAQ remained there until a 1989 move to the NBC Tower. WMAQ became a member of the NBC Red Network, later known as the NBC Radio Network, and remained affiliated with NBC well into the 1990s, even after the station was sold to Westinghouse Broadcasting.