Allen & Overy LLP is an international law firm with approximately 5,000 staff, including over 450 partners, working in 31 major centres worldwide. 

The firm was founded on 1 January 1930.  In May 2004, the worldwide partnership of Allen & Overy converted to a limited liability partnership, Allen & Overy LLP, which works together with associated undertakings in some jurisdictions to form a worldwide legal practice.

Allen & Overy's three major areas of commercial practice are Banking & Finance, International Capital Markets and Corporate.