Allen & Overy
Allen & Overy LLP (informally A&O) is an international law firm. It is a member of the UK's Magic Circle of leading law firms. In 2019, Allen & Overy advised on more transactional deals than any other law firm in the world and was one of two firms to have surpassed the US$1 trillion mark in terms of deal value, totalling US$1.16 trillion. As of 2019, Allen & Overy is the world's 10th largest law firm by revenue.