Sigma Films is a film production company based in Glasgow, Scotland. The company was formed in 1996 by Gillian Berrie, David Mackenzie and Alastair Mackenzie – a producer, director and actor respectively. Over the last twenty years the company has been responsible for film releases including Starred Up (2013), Under the Skin (2013), Perfect Sense (2011), Hallam Foe (2007), Red Road (2006), Young Adam (2003) and Dear Frankie (2004). In 2017, Sigma began production on big-budget historical epic Outlaw King for Netflix. Sigma have their production and post-production facility Film City Glasgow.