Aug 15 (Reuters) - Uruguayan fintech dLocal on Tuesday named former MercadoLibre senior executive Pedro Arnt as its co-chief executive officer alongside Sebastián Kanovich.

The company's shares rallied about 30% in extended trading as it also reported a 59% surge in second-quarter revenue, topping market expectations. (Reporting by Zaheer Kachwala in Bengaluru; Editing by Shinjini Ganguli)