Roark Capital, an Atlanta-based private equity firm, completed the acquisition of Mathnasium, a franchisor and operator of math learning centers. Financial terms were not disclosed. "Mathnasium is honored to join the Roark family of brands. Working together, we see a powerful opportunity for Mathnasium to transform the lives of many more children around the world and enable our franchisees to achieve even greater success," Shant Assarian, Mathnasium CEO.