Through a partnership with the ad technology firm Videology, AT&T plans to introduce what it’s referring to as a “private marketplace” for a select group of advertisers. Using Videology’s programmatic ad buying software, these advertisers will be able to buy linear TV ads on a wide range of cable networks in households that subscribe to AT&T’s U-Verse service or DirecTV, starting in the third quarter. AT&T acquired DirecTV last year for $49 billion.