1) Warner Bros - Warner Bros is an American production company which is apart of the multimedia conglomerate Time Warner. Some of their action films include Inception, Unknown and Under Siege.
2) MGM (Metro-Goldwyn-Mayer) - MGM is an American media, involved primarily in the production and distribution of feature films and television programs. Some of their action films include The Taking of Pelham 123, 22 Jump Street and Spectre.
3) Lionsgate - Lionsgate is a Canadian-American company; founded in Vancouver and headquartered in California. Some of their action films include London Has Fallen, Warrior and The Hunger Games.
4) Millennium Films - Millennium films is an American global film distributor based in Los Angeles. Some of their action films include Olympus Has Fallen, The Expendables and Rambo.
5) 20th Century Fox - 20th Century Fox is an American production company which is apart of the multimedia conglomerate News Corporation. Some of their action films include Die Hard, The Wolverine and Taken.