Grant Thornton LLP encompasses the US operations of Grant Thornton International, one of the largest accounting firms outside of the Big Four (Deloitte Touche Tohmatsu, Ernst & Young, KPMG, and PricewaterhouseCoopers). The firm has about 50 US offices.In addition to auditing, Grant Thornton provides such services as mergers and acquisitions advice, tax services, and business valuations to its customers. Target industries include construction, consumer products, financial services, government contracting, not-for-profit organizations, and technology.