This document discusses several major film production companies, focusing on three - Dimension Films, Twisted Pictures, and Blumhouse Productions - that specialize in horror films. Dimension Films has produced popular franchises like Scream and Halloween. Twisted Pictures is best known for creating the nine-film Saw series. Blumhouse Productions, run by Jason Blum, produces low-budget horror films that are often highly profitable, such as Paranormal Activity and Insidious.