Activision Blizzard, Inc. is an American video game holding company based in Santa Monica, California. Activision Blizzard currently includes three operating units: Activision, Blizzard Entertainment and King. Founded in July 2008 through the merger of Activision, Inc. and Vivendi Games, the company owns and operates additional subsidiary studios, as part of Activision, including Infinity Ward, Treyarch, and Sledgehammer Games.
https://en.wikipedia.org/wiki/Activision_Blizzard