Department profile
A&O Shearman

Arbitration (International)

Europe Guide 2026 : Europe-wide

Share profile

A&O Shearman

Rankings

Chambers Review

Provided by Chambers

Arbitration (International) - Europe-wide

Band 2

What the Team is Known For

Clients benefit from A&O Shearman's extensive office network across Europe, including London, Amsterdam, Brussels and Paris. The firm garners praise for handling international arbitrations seated in key jurisdictions across Europe under various national and international rules. A&O Shearman's teams are particularly active in high profile ECT and BIT cases, showcasing the firm's capacity to coordinate complex investor-state mandates between its offices. Its clientele includes sovereign states in Africa, Asia and the Middle East as well as private equity funds and energy giants. The firm boasts expertise across the energy, banking and finance, and construction sectors.

View ranking table

Work Highlights

Provided by Chambers

  • A&O Shearman advised Luxembourg on Mikahil Fridman's claim against the state under the 1989 BIT between Luxembourg and the USSR. He is seeking damages connected to EU sanctions following Russia's invasion of Ukraine. The matter is valued at USD4.5 billion.

Strengths

Provided by Chambers

  • The firm provides excellent response times, no matter how difficult or how diverse the questions. They very effectively utilise the strength of their global network.

    Arbitration (International) respondentEurope

  • The quality at A&O Shearman is outstanding.

    Arbitration (International) respondentEurope

  • A&O Shearman were very impressive. It was a very complex dispute. They were very good at the submission and had good arguments. The team is excellent.

    Arbitration (International) respondentEurope

  • I would like to point out A&O Shearman's global reach. They can provide us with quick assessments through their network very quickly, which is useful for us.

    Arbitration (International) respondentEurope

Notable Practitioners

Provided by Chambers

  • Jennifer Younan
    Jennifer Younan

    Jennifer Younan

    Paris-based Jennifer Younan is experienced in handling commercial and investor-state arbitrations across various rules, including those of the ICSID, LCIA and SCC, whereby she acts for states as well as corporates.

    • Jennifer Younan is very insightful and fierce when needed. She has a real strength to her. She makes things very digestible. She gives very well thought out responses and step-by-step advice.

      Arbitration (International) respondentEurope

    • Jennifer Younan is a brilliant arbitration practitioner. She is very thoughtful, patient and client-oriented.

      Arbitration (International) respondentEurope
    View profile
  • Marie Stoyanov
    Marie Stoyanov

    Marie Stoyanov

    Paris-based Marie Stoyanov is regularly mandated by sovereign states for her expertise in ICSID proceedings as well as ECT and BIT claims. She also represents prominent corporates in ICC arbitrations.

    • Marie Stoyanov is very articulate, focused and impressive. She is a certainly a lawyer I would recommend. She is also well organised, clear and convincing in the way she structures her arguments.

      Arbitration (International) respondentEurope
    View profile

Ranked Individuals at A&O Shearman (2)

Europe-wide

A&O Shearman has rankings in the following guides

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership