Hepworth Film Manufacturing Company had a business partner, H.V. Lawley, with whom Hepworth split in 1904. The company name listed as “The Hepworth Manufacturing Company Ltd.” on a poster for the Vivaphone synchronized sound system, with the address as 15 and 17 Cecil Court, Charing Cross Road, London, WC.

The company became Hepworth Picture Plays in 1919.

References: Sinyard-Silent p. 180.