The biggest company of professional wrestling is World Wrestling Entertainment , also called WWE . Currently , the largest professional wrestling company worldwide is the United States-based World Wrestling Entertainment ( WWE ) , which absorbed many smaller regional companies in the late twentieth century , as well as its primary competitors in early 2001 , World Championship Wrestling ( WCW ) and Extreme Championship Wrestling ( ECW ) . Other prominent professional wrestling companies are Total Nonstop Action Wrestling ( TNA ) and Ring of Honor ( ROH ) .