Since KPC-2-producing Klebsiella pneumoniae are associated with successful dissemination of a major clone, defined as sequence type 258 (ST258), the aim of this study was to perform whole-genome sequencing (WGS) of the first colistin-resistant K. pneumoniae strain (Kpn666) carrying blaKPC-2 identified in Uruguay in 2011 in order to identify genomic and phylogenetic traits.