RonanO’Reilly

Last month, Partner Neil Barofsky testified before the US Senate Judiciary Committee to present findings from the ongoing investigation into Credit Suisse's historical ties to Nazi-era clients. His testimony, which included a 75-page written statement, revealed previously unreported relationships between the bank and Nazi-era entities.

Partner James Rogers, Special Counsel Ronan O’Reilly, and Associate Connor Gray discuss key developments in international arbitration in 2025 and emerging trends for 2026 in an article published by Law.com.

Jenner & Block is pleased to announce that three of its International Arbitration lawyers have been recognised in the Arbitration Lexology Index Report, which highlights the leading arbitration practitioners worldwide and features lawyers, expert witnesses, and future leaders.

In an article for Law.com International, Partner James Rogers, Special Counsel Ronan O’Reilly, and Associate Connor Gray, all based in our London office, analyze the International Court of Justice's (ICJ) unanimous advisory opinion clarifying states' obligations under international law to protect the climate system and prevent climate damage.

Partner Laura MacDonald and Special Counsel Ronan O’Reilly authored a chapter titled “Covered Investors” in the tenth edition of Lexology In Depth’s Investment Treaty Arbitration, providing insight into how investment arbitration tribunals determine whether a claimant qualifies as a covered investor under an applicable international investment agreement (IIA).

Lawyers from Jenner & Block’s London Office were featured in the Pro Bono Recognition List of England & Wales.

As all eyes focus on peace talks and the future of the Russia/Ukraine conflict, Russia recently suffered another defeat in the long running Yukos saga, with the English Court of Appeal confirming that Russia could not invoke immunity against enforcement of the infamous Yukos award.

Partner James Rogers and Special Counsel Ronan O’Reilly discuss international arbitration key developments of 2024 and emerging trends for 2025 in an article published by Law.com.

Lawyers from Jenner & Block’s London Office were featured in the Pro Bono Recognition List of England & Wales.

In their chapter “Covered Investors” for the ninth edition of Lexology In Depth’s Investment Treaty Arbitration, Jenner & Block Partner Laura MacDonald and Special Counsel Ronan O’Reilly provide an in-depth look at how investment arbitration tribunals determine whether a claimant qualifies as a covered investor under an applicable international investment agreement (IIA). The authors discuss the definition of covered investors, explore current issues concerning the nationality of covered investo

In a decision of potential importance to arbitral award creditors and debtors, the US Court of Appeals for the Fifth Circuit recently reversed a federal district court decision confirming an English arbitral award on the basis that the district court lacked personal jurisdiction over the award debtor.[1]The award debtor had sought to enforce its foreign award in federal court in Louisiana under the Convention on the Recognition and Enforcement of Foreign Arbitral Awards (the New York Convention)

In this article for TDM, Special Counsel Ronan O’Reilly and Associate Jonathan Cowe examine the force majeure clause and how English courts handle its application concerning sanctions. It clarifies when parties can use sanctions as a force majeure event to excuse future contract performance. 

In their chapter for The Investment Treaty Arbitration Review, Jenner & Block Partner Laura MacDonald and Special Counsel Ronan O’Reilly provide an in-depth look at how investment arbitration tribunals address whether a claimant qualifies as a covered investor under an applicable international investment agreement (IIA). The authors discuss how covered investors are defined, explore current issues concerning the nationality of covered investors, and analyse the degree of control that the investo

With competition heating up, what can London do to maintain its pre-eminence as a top seat for international arbitration? 

In looking back at international arbitration developments in the UK from 2022, Partner Charlie Lightfoot and Special Counsel Ronan O’Reilly discuss the proposed reform of the English Arbitration Act and spotlight an arbitration related decision of the English Court of Appeal concerning the interpretation of a force majeure clause in the context of US-Russia-related sanctions (MUR Shipping BV v RTI Ltd ). As for 2023, the authors predict an increase in the number of international disputes relatin

London’s reputation as a leading dispute resolution center means it is extremely well placed to become a forum for disputes that result from the growing commercialization of space, whether in the English courts or in international arbitration, Partner Charlie Lightfoot and Associate Ronan O’Reilly wrote in The Times on May 19.