A&O Shearman

Allen Overy Shearman Sterling LLP (commonly A&O Shearman) is a multinational law firm. The firm was formed as a result of a merger between magic circle Allen & Overy and white shoe Shearman & Sterling, creating a firm estimated to have over 4,000 attorneys across 48 offices with a combined revenue of $3.4 billion, making it the third biggest law firm in the world.^[1]

Allen Overy Shearman Sterling LLP

No. of offices	Over 48 worldwide
No. of lawyers	Approximately 4,000
Major practice areas	General practice
Date founded	1 May 2024; 15 months ago (1 May 2024) by merger
Company type	Limited liability partnership
Website	www.aoshearman.com

The merger terms were announced on 21 May 2023^[2] and approved on 13 October 2023 by more than 99% of partners from both firms.^[3] The merger was completed on 1 May 2024, making it the fourth-largest firm in the world.^[4][5]

In September 2024, A&O Shearman announced that they would shut down their South African offices and instead support its Sub-Saharan clients from its other global offices.^[6] In January 2025, 57 former members of A&O Shearman in South Africa, including 14 partners, joined Bowmans.^[7][8]

In April 2025, A&O Shearman in the United States agreed to provide $125m of pro bono work for causes supported by President Donald Trump in response to threatened presidential executive orders.^[9]