The Summa Corporation records (1946-1989) include administrative, film-related, legal, and financial records primarily pertaining to the management of Howard Hughes' various corporations and assets. Administrative records contain correspondence and agreements to create The Amazing Howard Hughes documentary, research into Hughes' corporate history, and correspondence describing the management of Hughes' corporations. Film-related records include research into the copyrights of Hughes' films, contracts, agreements, and correspondence regarding film distribution and reel inventories. Legal materials relate to film piracy research and Hughes' legal battles with the Classic Film Museum.