Discovery, Inc. Series B Common Stock, also called Discovery, is a media company, which engages in the provision of content across distribution platforms and digital distribution arrangements. Read More It operates through the following segments: U.S. Networks and International Networks. The U.S. Networks segment owns and operates national television networks such as Discovery Channel, Animal Planet, and Investigation Discovery and Science. The International Networks segment consists of international television networks and websites. The company was founded by John S. Hendricks in September 1982 and is headquartered in Silver Spring, MD. The listed name for DISCB is Discovery, Inc. Series B Common Stock.