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International Arbitration

Allen & Overy’s International Arbitration group advises a diverse range of corporates, financial institutions and governments on complex cross-border commercial arbitrations and investment treaty arbitrations.

With arbitration experts, including leading advocates, spread across our global network of offices, we advise on the most pressing and complex disputes wherever they arise. 

A&O’s international arbitration expertise spans the full range of sectors in which arbitration is used, including: 

  • Energy and natural resources
  • Construction and infrastructure projects
  • Telecommunications
  • Life sciences
  • Banking and finance
  • Intellectual property rights
  • M&A and joint ventures

Representing clients in arbitrations under all the key rules, including the ICC, LCIA, HKIAC, SIAC and UNCITRAL Rules, our specialist practitioners around the world are qualified in many jurisdictions and fluent in numerous languages. Senior members of our team regularly sit as arbitrators and hold key positions with the leading arbitral institutions and/or legal associations. Our experience allows us to most effectively represent our clients' best commercial interests.

We typically conduct our own advocacy in clients’ arbitration cases, delivering cost savings and ensuring our advocates are involved from the very start of proceedings. Our approach to the conduct of matters is always informed by our advocacy experience.

News & insights


Publications: 09 APRIL 2021

Allen & Overy signs the Campaign for Greener Arbitrations: The Green Pledge

International Arbitration Group formally commits to reducing its environmental impact.

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France urges the EU to withdraw from the ECT

Publications: 03 MARCH 2021

France urges the EU to withdraw from the ECT

The EU should express its readiness to withdraw from the Energy Charter Treaty, France says in a letter to the European Commission.

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City, sun reflecting from the glass buildings

Publications: 15 FEBRUARY 2021

Global expert services firm breaches conflicts undertaking by appointments in related arbitrations

The obligations of an expert services provider to avoid a conflict with its client’s interests should be assessed by reference to the expert’s retainer and not (as was held at first instance) by…

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Exterior of a modern high rise building

Publications: 15 FEBRUARY 2021

Agreement on “non-binding” arbitration not an arbitration agreement

An agreement to submit to non-binding arbitration is not an enforceable arbitration agreement under the English Arbitration Act 1996. The court dismissed an application for stay of English court…

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  1. Band 1, Dispute Resolution, Global-wide, Chambers Global 2019
  2. International Arbitration Firm of the Year, Benchmark Litigation Asia-Pacific Awards 2019
  3. Best Arbitration Team of the Year in Spain and Portugal, 2019 



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