Mealey's ( June 10, 2026, 2:27 PM EDT) -- WASHINGTON, D.C. — Dutch investors and a Luxembourgish company on June 9 jointly filed a supplemental brief to the U.S. Supreme Court agreeing with the United States’ recent amicus curiae brief and arguing that the court should deny review of a District of Columbia Circuit U.S. Court of Appeals ruling finding jurisdiction over petitions to confirm intra-European Union arbitral awards against the Kingdom of Spain and urging the court to reject Spain’s arguments for hearing the case....