Although it has struggled at home, Banco Sabadell, the sixth-largest banking group in Spain, has nearly doubled the capital of its Miami bank to support a recent acquisition and further expansion in Florida.

Barcelona-based Banco Sabadell put $200 million of equity capital into Sabadell United Bank, increasing total capital to more than $400 million, said Fernando Perez-Hickman, chairman of the Miami bank and managing director of Banco SabadellAmerica.