Allen & Overy and Shearman & Sterling vote through mega-merger

Managing IP is part of Legal Benchmarking Limited, 4 Bouverie Street, London, EC4Y 8AX

Copyright © Legal Benchmarking Limited and its affiliated companies 2025

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Allen & Overy and Shearman & Sterling vote through mega-merger

Allen & Overy

UK-headquartered Allen & Overy and US firm Shearman & Sterling have agreed to merge, with 99% of votes in favour

Allen & Overy and Shearman & Sterling have agreed to merge today, a move that partners at both firms say will create a “global elite law firm”.

The deal, first proposed in May, creates A&O Shearman, a firm that boasts 3,950 lawyers and 800 partners across 48 offices with combined revenues of approximately $3.5 billion.

A&O appears to be the more dominant force when it comes to intellectual property. The firm has an expansive IP team covering multiple jurisdictions.

Shearman & Sterling does not appear, at least on the face of it, to have a particularly large IP practice. Its website profiles 10 IP litigation lawyers and six lawyers active in IP transactions.

When Managing IP contacted both firms in May neither wanted to be drawn on IP specifics.

According to both firms, A&O Shearman will be the only global firm that offers US, UK and local law capabilities in equal measure.

The announcement in May was subject to partners at both firms voting in favour of the proposal with a significant majority needed to pursue the plans. More than 99% of the votes cast at each firm were in favour.

The deal is expected to be finalised in or before May 2024.

Both firms have made no secret of their desire to secure a transatlantic tie-up.

In March, Shearman & Sterling abandoned talks over a tie-up with Hogan Lovells, while A&O previously pursued a merger with another US firm, O'Melveny & Myers.

Wim Dejonghe, senior partner at A&O in London, said: “This is a historic moment for both firms and our profession. We are delighted that our partners have voted so resoundingly in favour of this merger, which is a transformational step for the legal industry."

Adam Hakki, senior partner at Shearman & Sterling, said: “Our partners have recognised and welcomed this unparalleled opportunity to combine our individual market leadership and brands to serve clients as an integrated global law firm, preeminent in all our markets.”

more from across site and SHARED ros bottom lb

More from across our site

Exclusive data and analysis reveal how firms can differentiate themselves when it comes to costs and value
The Berlin office will mark the firm’s fourth German base and tenth overall
As we build up to another busy year for the IP STARS rankings and Managing IP Awards, we give a rundown of some of the major IP firms and trends in the UK
Three firms have received at least 13 nominations, while a further three have 12 nominations each
Harish Daiya discusses the value of IP monetisation, the benefits of a carefully structured day, and how to fit several coffee meetings into the working week
Directors at the firm explain how the drafting tool works, and why they may need to strengthen their team post-launch
A diversity pledge for in-house IP lawyers and well-known trademark recognition for Taj were also among the top talking points this week
Counsel are expecting policies that are favourable to patent owners and say the fear factor over applying for patents may diminish
Douglas Carsten says he is keen to increase fee earner headcount in the firm’s San Diego office, which opened this week
The deal could mean that hundreds of licensees in the pool would have access to a broader range of VVC patents
Gift this article