AT&T renames Time Warner to WarnerMedia post-merger; Turner CEO John Martin to exit

AT&T announced today that Time Warner has been renamed to WarnerMedia, and has announced the exit of current Turner chief executive John Martin.
Martin had been with the cable network group, which has CNN, Turner Sports, TNT, TBS, Cartoon Network and Adult Swim in its roster of channels, since 2014. Although he has stepped down, the rest of the leadership team at Turner, as well as sibling companies Warner Bros and HBO, remain intact.
Time Warner Inc. chairman and chief executive Jeff B