AT&T to exit media in $43 billion deal with Discovery The new company, whose name will be disclosed by next week, will be 71% owned by AT&T's shareholders and 29% by Discovery's. Written By: Kenneth Li and Subrat Patnaik / Reuters | 7:33 am, May 17, 2021 × The company logo for AT&T is displayed on a screen on the floor at the New York Stock Exchange in New York on Sept. 18, 2019. REUTERS/Brendan McDermid/File Photo May 17 (Reuters) — AT&T, owner of HBO and Warner Bros. studios, and Discovery, home to lifestyle TV networks such as HGTV and TLC, said on Monday they will combine their content assets to create a standalone global entertainment and media business.