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Allen & Overy and Shearman & Sterling Announce Merger to Create Allen Overy Shearman Sterling

Allen & Overy and Shearman & Sterling Announce Merger to Create Allen Overy Shearman Sterling

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On May 21, 2023, Allen & Overy and Shearman & Sterling announced they are merging into a fully integrated firm: Allen Overy Shearman Sterling – A&O Shearman for short.

Globally, A&O Shearman will have approximately 3,900 lawyers and approximately 800 Partners across 49 offices. In CEE, A&O is the only one present with offices in the Czech Republic, Hungary, Poland, Slovakia, and Turkey (through its association with Gedik & Eraksoy). The firm also had a presence in Romania (through its association with RTPR, which ceased in March 2020) and in Russia (with the office winding down following Russia's invasion of Ukraine).

“This combination of two great firms is such an exciting step for us," Allen & Overy Senior Partner Wim Dejonghe commented. "Both firms have a history of excellence, and together we think A&O Shearman will be a firm unlike any other in the world.

"Client need for global elite firms has never been greater," Shearman & Sterling Senior Partner Adam Hakki added. "They are calling for integrated global legal solutions and advice: merging with Allen & Overy will dramatically accelerate our ability to meet their needs in an increasingly complex environment."

Simpson Thacher & Bartlett is advising Allen & Overy and Davis Polk & Wardwell is advising Shearman & Sterling on the merger.

Editor's Note: On October 13, 2023, A&O Senior Partner Wim Dejonghe announced that the partnerships of both Allen & Overy and Shearman & Sterling had voted in favor of merging to create A&O Shearman, "with a 99%+ majority in both firms."

"This is a historic moment for both firms and our profession," Dejonghe commented. "We are delighted that our partners have voted so resoundingly in favor of this merger, which is a transformational step for the legal industry."


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Nagy és Trócsányi was founded in 1991, turned into limited professional partnership (in Hungarian: ügyvédi iroda) in 1992, with the aim of offering sophisticated legal services. The firm continues to seek excellence in a comprehensive and modern practice, which spans international commercial and business law. 

The firm’s lawyers provide clients with advice and representation in an active, thoughtful and ethical manner, with a real understanding of clients‘ business needs and the markets in which they operate.

The firm is one of the largest home-grown independent law firms in Hungary. Currently Nagy és Trócsányi has 26 lawyers out of which there are 8 active partners. All partners are equity partners.

Nagy és Trócsányi is a legal entity and registered with the Budapest Bar Association. All lawyers of the Budapest office are either members of, or registered as clerks with, the Budapest Bar Association. Several of the firm’s lawyers are admitted attorneys or registered as legal consultants in New York.

The firm advises a broad range of clients, including numerous multinational corporations. 

Our activity focuses on the following practice areas: M&A, company law, litigation and dispute resolution, real estate law, banking and finance, project financing, insolvency and restructuring, venture capital investment, taxation, competition, utilities, energy, media and telecommunication.

Nagy és Trócsányi is the exclusive member firm in Hungary for Lex Mundi – the world’s leading network of independent law firms with in-depth experience in 100+countries worldwide.

The firm advises a broad range of clients, including numerous multinational corporations. Among our key clients are: OTP Bank, Sberbank, Erste Bank, Scania, KS ORKA, Mannvit, DAF Trucks, Booking.com, Museum of Fine Arts of Budapest, Hungarian Post Pte Ltd, Hiventures, Strabag, CPI Hungary, Givaudan, Marks & Spencer, CBA.

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