Arnondo Chakrabarti


Arnondo has over two decades of experience across a wide range of contentious matters, representing clients in complex litigation as well as regulatory, criminal and internal investigations.

He has particular experience advising household-name financial institutions on banking and finance litigation, group litigation, contractual disputes and disputes involving antitrust issues, frequently leading the coordination of litigation strategy and teams across borders. He also navigates clients through investigations involving the UK Financial Conduct Authority and Serious Fraud Office, with particular experience advising clients on bribery and corruption. Arnondo is one of very few lawyers in the market with expertise in advising on both contentious regulatory proceedings and corporate crime issues. Arnondo also advises on public law issues and previously practised as a barrister at Matrix Chambers.

Arnondo is recognised as a leading disputes lawyer by legal directories, having been described as “one of the best lawyers in the city” and “absolutely attuned to the tensions in highly emotive contentious matters”. Recent feedback notes that he “is completely unflappable, highly intelligent, strategically acute, and constantly thinks about his clients and what they need" (Chambers UK, 2021), and that he “is a tough litigator who fights hard for his clients” (Legal 500 UK, 2021).


Representative matters

A leading global bank in highly-publicised litigation based on allegations that it colluded in an anti-competitive manner to manipulate foreign exchange (FX) rates. Representing the client in the High Court and Competition Appeal Tribunal.

A leading global bank in an FCA investigation into the FX market. An American investment bank in a claim brought by an investment fund in the Commercial Court in relation to the liquidation of collateral provided by the investment fund, which secured a loan facility agreement provided by our client.

BAE Systems PLC in the defence of the public investigation by the UK SFO relating to the company’s involvement with the Al Yamamah defense contract with Saudi Arabia and its procurement of contracts in multiple jurisdictions around the world. Advised on the global settlement of the investigation with a fine of GBP30 million to settle false accounting charges brought by SFO in connection with the company’s conduct in Tanzania.

Hiscox on the contentious regulatory aspects of the ground-breaking test case bought by the FCA in relation to the response of business interruption insurance policies to Covid-19.



Admitted as solicitor, England and Wales, 1997


BSc, Economics, London School of Economics and Political Science, 1993

CPE, The College Of Law, London, 1994


A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.