SOUTH PORTLAND, Maine--(BUSINESS WIRE)--WEX Inc. (NYSE: WEX), a leading provider of corporate payment solutions, today announced it has acquired the remaining 49% stake in UNIK S.A. (“UNIK”). Following WEX’s initial investment in 2012, WEX has now consummated the purchase of the remaining interest in UNIK. UNIK is a leading provider of salary payment and freight cards in Brazil. UNIK’s cards are accepted at over 1.8 million commercial establishments in Brazil. About WEX Inc. WEX Inc. (NYSE: WEX