Arnold & Porter

Arnold & Porter’s public international law offering stands out for its strength in advising sovereign states on a range of contentious mandates, particularly investment treaty arbitrations, with a notable focus on arbitrations in Latin America. ICSID arbitration is another significant pillar of work for the group. Practice co-heads Patricio Grané Labat, described as ‘fiercely committed with a razor-sharp intellect’, and David Reed take point on investor-state arbitration and international investment treaty arbitrations, respectively. Also in the core team is Álvaro Nistal, who was elevated to the partnership in January 2025 and is praised by clients for his ’commercial acumen and a tenacious work ethic’; Nistal acts for sovereign states and international organisations on a broad range of contentious PIL matters.