Allen & Overy and Shearman & Sterling to create the first fully integrated global law firm

  • together Allen Overy Sherman Sterling It will be the only global firm with equal capabilities in American law, English law and domestic law.
  • ~3,900 lawyers in 49 offices and approx $3.4 billion in combined revenue.
  • The merger will accelerate the growth strategy of both companies, each with distinct market leadership and a strong cultural fit.

London And New YorkAnd May 21, 2023 /PRNewswire/ — Allen & Overy and Shearman & Sterling today announced a planned merger to create a unique, global law firm called Allen Overy Sherman Sterling – A&O Shearman for short. This merger will bring together two of the world’s most prestigious law firms, who are leaders in their respective markets, to create an elite, integrated global firm.

Together A & O would have Shearman ~3900 lawyers and ~800 partners across 49 offices. Allen & Overy and Shearman & Sterling bring together 250 years of combined experience and some of the greatest legal talent in the world. A&O Shearman will be the only global firm with equal capabilities in American law, English law, and domestic law. This merger is driven by clients’ needs to deliver a seamless global offering of the highest quality and depth to support them in navigating an increasingly complex legal, regulatory and geopolitical environment.

Allen & Overy and Shearman & Sterling supplement market leaders are distinct, with tremendous strength in the US, UK and worldwide markets. This merger will transform their offering to clients: Shearman & Sterling will gain access to a significantly expanded Rest of the World offering across practice areas, and Allen & Overy will benefit from increased board-level recognition and expanded access to its corporate client base in the U.S. The combined company is ideally positioned to benefit from global macro trends including energy transition, technology and private capital.

Wim DeJongeA senior partner at Allen & Overy said:

“This bringing together two great companies is an exciting step for us. Both companies have a history of excellence, and together we believe A&O Shearman will be a company like no other in the world. We listen to our customers and their requests with the highest quality advice to help navigate the demands they face, and do so in a way Globally integrated and consistent.We, A&O Shearman, will do this by accelerating our ability to bring the best of both companies, regardless of geography.

Shearman & Sterling is a fine group of legal minds. A company built on integrity and excellence, founded like us in a leading global financial capital and with an extraordinary group of longstanding clients. What excites me about this merger is the complementary cultures of our two companies. We have amazing similarities in all areas, and I think we would be great partners for each other on this journey.”

Adam is rightSenior partner at Shearman & Sterling said:

“Clients’ need for global elite firms has never been greater. They demand integrated global legal solutions and advice: merging with Allen & Overy will dramatically accelerate our ability to meet their needs in an increasingly complex environment. Allen & Overy is an outstanding firm we have always admired We do our work and think of it as a kind soul.We have always placed great emphasis on attracting and retaining the best talents, were early on globalization, and relentlessly focus on quality, excellence and cooperation.

It is truly a game-changing moment for both companies that will create an unparalleled proposition for our customers. It is also an amazing opportunity for our people to be part of a transformative deal and an organization of this importance, and we look forward to hiring even more outstanding talent in the years to come.”

The proposed merger is subject to the usual closing conditions, including a vote by the partners of each of the companies involved.

More information about A&O Sherman can be found here:

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Lazard is acting as financial advisor while Simpson Thacher & Bartlett LLP is acting as legal advisor to Allen & Overy.

Davis Polk & Wardwell LLP is acting as legal counsel to Shearman & Sterling.

Notes to editors

Allen & Overy LLP
Allen & Overy means Allen & Overy LLP and/or its affiliates. Allen & Overy LLP is a limited liability partnership registered in England And Wells With registered number OC306763. Allen & Overy (Holdings) Limited is a limited company registered in England And Wells With registered number 07462870. Allen & Overy LLP and Allen & Overy (Holdings) Limited are authorized and regulated by the Solicitors Regulatory Authority of England and Wales.

The term partner is used to refer to a member of Allen & Overy LLP, a director of Allen & Overy (Holdings) Limited or, in either case, an employee or consultant of equivalent standing and qualifications or an individual of equivalent status in an undertaking of Allen & Overy LLP. List of members of Allen & Overy LLP and non-members appointed as partners, and list of directors of Allen & Overy (Holdings) Limited, open for inspection at our registered office at One Bishops Square, London E1 6AD.

Allen & Overy is an international law practice with approximately 5,800 people, including approximately 590 partners, working in more than 40 offices around the world. A current listing of Allen & Overy offices is available at

Sherman and Sterling LLP
Shearman & Sterling LLP is a limited liability partnership organized by laws Delaware. Sherman and Sterling (LondonAn LLP is a limited liability partnership organized under the laws Delaware To practice law in United kingdom. Shearman & Sterling is a partnership organized under the Partnership Act of Hong Kong and registered with the Law Society of Hong Kong Hong Kong To practice law in Hong Kong. Shearman & Sterling LLP’s practices Italy In association with Studio Legale Associato Sherman & Sterling. Shearman & Sterling LLP is working in association with the law firm of Dr. Sultan Al Masoud To practice law in Kingdom of Saudi Arabia.

Source: Allen, Overy, Sherman, and Sterling

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