 The Local TV stations were operated under a joint management agreement with Tribune Broadcasting, which provided web hosting, technical and engineering services to the Local TV stations, along with news content sharing among all of the stations; the Local TV/Tribune stations also made up the nucleus of the Antenna TV digital subchannel network, which launched in January 2011.Tribune purchased Local TV outright for $2.75 billion on July 1, 2013, adding the seven former Fox O&Os to the six Fox affiliates that it already owned (KSWB-TV; WXIN; KCPQ [channel 13] in Seattle; WXMI [channel 17] in Grand Rapids; WPMT [channel 43] in Harrisburg; and KTXL [channel 40] in Sacramento), making Tribune the largest owner of Fox-affiliated stations by total market coverage (surpassing the Sinclair Broadcast Group, which remains the largest Fox affiliate owner by total number of stations owned and/or operated).The sale was completed on December 27, 2013.