Manatt, Phelps & Phillips LLP is a Los Angeles-based law firm of approximately 450 attorneys and other professionals founded in 1965. The firm earned revenues in excess of $240 million in 2007. Manatt also operates a subsidiary ManattJones Global Strategies which offers a range of consulting services to public and private corporations with professionals in all of the firm's US offices plus outposts in Mexico City and São Paulo. James R. Jones, a former Congressman from Oklahoma and Ambassador to Mexico is a member of ManattJones. William T. Quicksilver is the firm's Chief Execuctive and Managing Partner.
In 2008, the firm combined with Steefel, Levitt & Weiss to expand its presence in San Francisco.