Sovereign-Side Investment Treaty Arbitration

Arnold & Porter has been at the forefront of investor-state arbitration from the very beginning. Thurman Arnold, one of the firm's founders, was a member of ICSID's very first Panel of Arbitrators, in the 1960s. With this head start, it is no wonder that we have developed one of the world's most active and successful investor-state practices. We have served as lead counsel in more than 60 investor-state arbitrations, under a variety of arbitral rules. Five states have entrusted us with their first-ever investor-state case, and 12 states have entrusted us to defend them in multiple matters. Across our International Arbitration practice, we have represented 24 sovereign states, securing for them an unparalleled record of 38 consecutive positive results (read our brochure).

Track Record of Success: No other firm has a longer streak of consecutive positive rulings on behalf of sovereign states in investment arbitrations.

Trusted Advisers to States Worldwide: Clients have included governments, subdivisions or state-owned entities of Argentina, Bulgaria, Canada, Chile, Colombia, Costa Rica, Czechia, Dominican Republic, Ecuador, El Salvador, France, Guatemala, Hungary, Kyrgyzstan, Nigeria, Panama, Peru, Philippines, Slovak Republic, South Korea, Sri Lanka, Thailand, and Venezuela.

Client Service: With 40+ attorneys across 8 offices in the US, UK, China, and South Korea, and professional fluency in 10 languages, we provide extraordinarily responsive (and user-friendly) client service and support.

"As a defender of states, Arnold & Porter has arguably had a longer winning streak at ICSID than any other firm in this book." –Global Arbitration Review "GAR 100" 2020
38 Consecutive Positive Rulings
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