Passage: When the studio was still reluctant to change Monroe's contract, she founded a film production company in late 1954; she named it Marilyn Monroe Productions (MMP). She dedicated 1955 to building her company and began studying method acting at the Actors Studio. In late 1955, Fox awarded her a new contract, which gave her more control and a larger salary. Her subsequent roles included a critically acclaimed performance in Bus Stop (1956) and the first independent production of MMP, The Prince and the Showgirl (1957). Monroe won a Golden Globe for Best Actress for her work in Some Like It Hot (1959), a critical and commercial success. Her last completed film was the drama The Misfits (1961).

Question: When did she build her company?
1955