Supreme Court Sides with Jenner & Block Amicus Brief in Halkbank v. United States

A Jenner & Block team consisting of Partners Rachel Alpert, Adam Unikowsky, and Douglass Mitchell along with Associates Eric Petry and Kyle Tramonte recently assisted Mark Feldman and Professor Chiméne Keitner on submitting an amicus brief to the Supreme Court in Halkbank v. United States.

The brief argues that neither international law in the form of federal common law nor the Foreign Sovereign Immunities Act exempt foreign countries or their government organizations from criminal jurisdiction.

In their decision, the Supreme Court held that the Foreign Sovereign Immunities Act does not provide foreign states and their instrumentalities with immunity from criminal proceedings.

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© 2026 Jenner & Block LLP. Attorney Advertising. Jenner & Block LLP is an Illinois Limited Liability Partnership including professional corporations. This publication, presentation, or event is not intended to provide legal advice but to provide information on legal matters and/or firm news of interest to our clients and colleagues. Readers or attendees should seek specific legal advice before taking any action with respect to matters mentioned in this publication or at this event. The attorney responsible for this communication is Brent E. Kidwell, Jenner & Block LLP, 353 N. Clark Street, Chicago, IL 60654-3456. Prior results do not guarantee a similar outcome. Jenner & Block London LLP, an affiliate of Jenner & Block LLP, is a limited liability partnership established under the laws of the State of Delaware, USA and is authorised and regulated by the Solicitors Regulation Authority with SRA number 615729. Information regarding the data we collect and the rights you have over your data can be found in our Privacy Notice. For further inquiries, please contact dataprotection@jenner.com.

Supreme Court Sides with Jenner & Block Amicus Brief in Halkbank v. United States

A Jenner & Block team consisting of Partners Rachel Alpert, Adam Unikowsky, and Douglass Mitchell along with Associates Eric Petry and Kyle Tramonte recently assisted Mark Feldman and Professor Chiméne Keitner on submitting an amicus brief to the Supreme Court in Halkbank v. United States.

The brief argues that neither international law in the form of federal common law nor the Foreign Sovereign Immunities Act exempt foreign countries or their government organizations from criminal jurisdiction.

In their decision, the Supreme Court held that the Foreign Sovereign Immunities Act does not provide foreign states and their instrumentalities with immunity from criminal proceedings.

Related Locations

© 2026 Jenner & Block LLP. Attorney Advertising. Jenner & Block LLP is an Illinois Limited Liability Partnership including professional corporations. This publication, presentation, or event is not intended to provide legal advice but to provide information on legal matters and/or firm news of interest to our clients and colleagues. Readers or attendees should seek specific legal advice before taking any action with respect to matters mentioned in this publication or at this event. The attorney responsible for this communication is Brent E. Kidwell, Jenner & Block LLP, 353 N. Clark Street, Chicago, IL 60654-3456. Prior results do not guarantee a similar outcome. Jenner & Block London LLP, an affiliate of Jenner & Block LLP, is a limited liability partnership established under the laws of the State of Delaware, USA and is authorised and regulated by the Solicitors Regulation Authority with SRA number 615729. Information regarding the data we collect and the rights you have over your data can be found in our Privacy Notice. For further inquiries, please contact dataprotection@jenner.com.

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