David Heyman has produced all the films in the franchise with his company Heyday Films, while David Barron joined the series as an executive producer on Chamber of Secrets and Goblet of Fire. He was later appointed producer on the last three instalments. Chris Columbus was an executive producer on the first two films alongside Mark Radcliffe and Michael Barnathan, but became a producer on the third film alongside Heyman and Radcliffe. Tanya Seghatchian was an executive producer on the third and fourth films, with Lionel Wigram joining the team on the final three films. J. K. Rowling, the author of the series, was asked to become a producer on Goblet of Fire, but declined. However, she accepted the role on the two-part Deathly Hallows.
Heyday Films and Columbus' company 1492 Pictures collaborated with Duncan Henderson Productions in 2001, Miracle Productions in 2002 and P of A Productions in 2004. Even though Prisoner of Azkaban was the final film produced by 1492 Pictures, Heyday Films continued with the franchise and collaborated with Patalex IV Productions in 2005. The sixth film in the series, Half-Blood Prince, was the most expensive film to produce.