Sociedades Bolivar S.A. (BVC:SOCBOLIVAR) (Grupo Bolívar) hired UBS to seek a buyer for Seguros Colpatria S.A. in a deal that may amount to $500million, sources confirmed to BNamericas. Swiss insurer ACE Limited (NYSE:ACE) as well as US insurers Prudential plc (LSE:PRU) and MetLife, Inc. (NYSE:MET) are among the interested bidders for the Colombian insurer, according to the sources.