Thomas H. Lee Partners, an American private equity firm, completed the merger of MHS, a global provider of material handling automation technology and systems integration, and Fortna, a software and solutions provider for warehouse and distribution. THL remains the majority owner of the combined company and Abu Dhabi Investment Authority acquired a significant minority stake. Financial terms were not disclosed. “Fortna has been a trusted advisor driving competitive advantage for our clients as they build direct-to-consumer models, increase service levels, and enable a lower cost to serve. The combination with MHS will enable the model to scale with our clients globally and allow the combined company to drive further innovation in operating models, software, and automation," Rob McKeel, Fortna CEO.