Main Street Capital Corporation (NYSE:MAIN), acquired Trantech Radiator Products, Inc. from Industrial Opportunity Partners LLC. Posted on 06/04/2019 by Ron Klammer Posted in Mergers & Acquisitions Tagged Hardware & Systems Trantech Radiator Products, Inc. manufactures and markets transformer radiators in North America. Its products include coolers, control panels, fans, flow indicators, IHR, manifolds, pumps, welded header, and valves.