SOUTH PORTLAND, Maine--(BUSINESS WIRE)--WEX Inc. (NYSE: WEX), a leading provider of corporate payment solutions, today announced the completion of its acquisition of Benaissance, a leading provider of integrated software-as-a-service (SaaS) technologies and services for healthcare premium billing, payment and workflow management. Benaissance is now a wholly-owned subsidiary of WEX and will be part of the Evolution1 business unit. "The close of this transaction advances our strategy to grow our