Law360 Names Katelyn Horne to 2025 ‘Rising Stars’ List

Arnold & Porter International Arbitration senior associate Katelyn Horne was named to Law360’s 2025 list of “Rising Stars.” The annual report highlights attorneys under 40 “whose legal accomplishments belie their age.”

Horne advises sovereign States, State-owned entities, private companies, and prominent individuals in relation to international arbitration, public international law, and other disputes. She has served on teams that have secured complete victories for sovereign States in a series of investment treaty arbitrations under various international treaties. She also provides counsel to sovereign States with respect to maritime boundaries and entitlements, sovereign immunity, and international human rights law; represents private entities in international commercial disputes; and advises individuals on issues of sovereign and diplomatic immunity. Her experience includes disputes brought before international tribunals (administered by various arbitral institutions), the International Court of Justice, the United Nations Human Rights Committee, and the United Nations Working Group on Arbitrary Detention. Prior to joining Arnold & Porter, Horne was an Associate Legal Officer at the International Court of Justice, and a political appointee in the Executive Branch of the U.S. Government.