New Mountain Capital, an investment firm, completed the investment in Grant Thornton, a provider of audit and assurance, tax, and advisory services. Financial terms were not disclosed. “Our partnership with New Mountain Capital empowers Grant Thornton to deliver transformational, high-quality outcomes for our clients, our talented team members and the industry as a whole. The investment immediately enhances our value in the marketplace and enables us to accelerate our current strategy. We’ll enjoy greater scale, resources and agility, while better positioning the firm to make targeted investments in talent, technology, infrastructure and enhanced capabilities. Grant Thornton will further solidify our position as the industry’s platform of choice,” Seth Siegel, Grant Thornton CEO.