May River Capital, a Chicago-based private equity firm focused on investing in lower middle-market, industrial growth companies, completed the acquisition of Boston Centerless, a manufacturer and distributor of precision raw materials and preparation services. Financial terms were not disclosed. "After careful evaluation of our growth objectives, our team is thrilled to team up with a partner in May River that is like-minded and aligned with us on both our strategic path forward and, equally as important, our cultural values. This partnership will enable us to accelerate our growth initiatives and ultimately better serve our customers' needs. Customers should expect the same great service and quality products from us going forward," Steve Tamasi, Boston Centerless CEO.