The Riverside Company has sold logistics business MNX Global Logisitics to Audax Private Equity for an undisclosed sum.

MNX provides logistics services for sensitive, high value goods. The company offers a portfolio of expedited shipping, supply chain management and freight services.

Riverside first backed the business in 2012. Sales have double during the buyout firm’s hold, with Riverside supporting the bolt-on acquisitions of Singapore-based Aero Express Logistics, which enhanced MNX’s offering for aerospace customers in the Asia-Pacific region, and Melbourne-based Logical Freight Solutions, which improved MNX’s healthcare and life sciences capabilities. The company now covers 190 countries.

BB&T Capital Markets and Jones Day advised Riverside on the transaction.