The Riverside Company has acquired Midnite Air Corp. (dba MNX), a transportation and logistics service provider that serves customers largely in the life sciences, aviation services, entertainment and medical device industries. Senior debt financing for the deal was provided by Madison Capital and Bank of Montreal, while mezzanine financing was provided by Babson Capital Management. MNX's primary service offering is its Express Service, which is used to transport high value items, typically on a same-day basis. Last year, the company received a minority investment from St. Cloud Capital.