LAWYER PROFILE
Stephen Jagusch KC

Stephen Jagusch KC

Global 2026

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Ranked in 2 practice areas

Contributions and articles

1 Global Practice Guides

About

Provided by Quinn Emanuel Urquhart & Sullivan, LLP

Practice Areas

Stephen Jagusch KC is Global Chair of Quinn Emanuel's International Arbitration Practice. He specializes in international commercial and investment treaty arbitration, having acted as adviser and advocate in dozens of ad hoc and institutional international arbitrations, conducted in many countries around the world, and subject to a wide variety of governing substantive and procedural laws. A great many of Stephen's cases have been for or against sovereign states or substantial multinational organizations, and he has been lead counsel in many of the world's leading investment treaty cases.

Stephen is recognized as a leading expert in the field of international arbitration and disputes arising under contracts and bilateral or multilateral investment treaties, and is highly ranked by all international and domestic legal publications in international arbitration and public international law. Leading directories recognize Stephen as a leader in his field and have recently described Stephen as "one of the most impressive advocates around," "a masterful cross-examiner," a "tenacious fighter," the "maestro of strategy," “one of the gurus in the field,” "one of the pre-eminent ICSID arbitration experts in the world," and praise his “finely honed instincts for strategy in advocacy.”

Stephen routinely speaks at leading conferences and seminars and is widely published on the subject of international arbitration. He won the inaugural (and subsequent) Client Choice Award for Best Arbitration Lawyer in the UK. Chambers & Partners and Super Lawyers both rate Stephen as one of the leading lawyers in the UK across all fields of practice. Most recently, Stephen was awarded "Best Lawyer in the United Kingdom for International Arbitration" by Best Lawyers. Prior to joining the firm, Stephen was Chair of the Global International Arbitration Practice of Allen & Overy LLP.

Stephen regularly sits as an arbitrator and has sat as Chair, Sole or Co-Arbitrator in dozens of cases around the world under the auspices of ad hoc and all the major institutional rules, in both commercial and investor-State arbitrations. He is a member of the BCDR Board of Trustees (BoT).

Chambers Review

Provided by Chambers

Chambers Global Guide

International Arbitration - UK

Band 1
Band 1

Individual Editorial
Stephen Jagusch KC is global chair of the firm's international arbitration practice. He is recognised in the market for his handling of complex arbitrations, regularly acting as counsel and arbitrator in high-value energy and construction disputes. He is also highlighted for his handling of significant treaty claims.

Arbitration (International) - Europe-wide

Band 2
Band 2

Individual Editorial

London-based Stephen Jagusch KC is well versed in handling high profile investor-state disputes under UNCITRAL and ICSID rules. He also advises clients on commercial cases, including LCIA-governed proceedings.

Arbitration (International) - Global Market Leaders

Band 3
Band 3

Individual Editorial

Stephen Jagusch KC is the global chair of the firm's international arbitration practice. He has an exceptional reputation in the field, and is particularly lauded for his experience representing corporates, financial institutions and sovereign states in major investor-state and commercial arbitrations. His sectorial expertise includes proficiency in the banking and finance, telecommunications and infrastructure industries.

Strengths

Provided by Chambers

  • Stephen is an effective advocate and is very impressive.

    International ArbitrationChambers Global Guide

Ranked Individuals at Quinn Emanuel Urquhart & Sullivan, LLP (65)

Africa-wide

Australia

Belgium

Brazil

China

  • Profile image of John Rhie
    John Rhie

    Dispute Resolution: Arbitration (International Firms)

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Europe-wide

France

Germany

  • Profile image of Marcus Grosch
    Marcus Grosch

    Intellectual Property: Patent Litigation

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  • Profile image of Jérôme Kommer
    Jérôme Kommer

    Intellectual Property: Patent Litigation

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  • Profile image of Johannes Bukow
    Johannes Bukow

    Intellectual Property: Patent Litigation

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Global Market Leaders

All Contributions (1)

Provided by Quinn Emanuel Urquhart & Sullivan, LLP

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