Citadel Securities has withdrawn its U.S. trade secret lawsuit against Portofino Technologies, opting instead to focus on recovering nearly £6 million through U.K. bankruptcy proceedings. The decision follows a joint application with Portofino to dismiss the New York case, citing the difficulty of enforcing a previous London arbitration judgment. The U.S. litigation, which lasted nearly three years, did not result in a substantive ruling on Citadel's trade secret claims. Citadel maintains that the withdrawal is not due to a lack of merit in its claims but because it had already succeeded in the London arbitration.