Major film studios are production and distribution companies that release a substantial number of films annually and consistently command a significant share of box office revenue in a given market. In the American and international markets, the major film studios, often known simply as the majors or the Big Five studios, are commonly regarded as the five diversified media conglomerates whose various film production and distribution subsidiaries collectively command approximately 80 to 85% of American box office revenue. The term may also be applied more specifically to the primary motion picture business subsidiary of each respective conglomerate.