Amazon.com Inc. is competing against other suitors to buy out Landmark Theatres, according to a Bloomberg report citing unnamed sources familiar with the situation. The movie-theater chain would be purchased from Wagner/Cuban Cos., but no final decisions have been made and talks could unravel, the report added. That enterprise is backed by billionaires Mark Cuban and Todd Wagner. Separately, a Reuters report said Amazon is considering offering a U.K. price comparison website for insurance products. Amazon's stock AMZN, +1.14% , one of the equity market's biggest winners this year, were not yet active in U.S. premarket trade on Thursday.