AT&T Inc. /zigman2/quotes/203165245/composite T +0.74% is in talks to sell off Warner Bros. Interactive Entertainment in that deal that could value the gaming business at as much as $4 billion, according to a report Friday. CNBC reported that Take-Two Interactive Software Inc. /zigman2/quotes/204008930/composite TTWO -0.82% , Electronic Arts Inc. /zigman2/quotes/206954087/composite EA +0.13% and Activision Blizzard Inc. /zigman2/quotes/200717283/composite ATVI -1.37% are all interested in the gaming division, according to unidentified sources close to the matter. Warner Bros. Interactive carries such titles as "Harry Potter: Wizards Unite," "Mortal Kombat 11," "Game Of Thrones Conquest," as well as the Lego and Hitman franchises. CNBC said it was unable to obtain comment from the involved parties. AT&T shares closed up 1.1% at $30.50, while Take-Two shares declined 0.7% to $134.00, Electronic Arts shares fell 0.4% to $121.97, and Activision shares rose 0.6% to close at $71.68.