Grant Thornton is an accounting and business advisory firm which provides a wide range of audit, tax and advisory services to industry, private companies, charitable organizations, and other entities that require professional services. Grant Thornton International has offices in over 130 countries. The Canadian firms, comprised of Grant Thornton LLP and Raymond Chabot Grant Thornton, have about 125 offices, with locations in almost every province. On PEI, there are locations in Charlottetown, Montague, and Summerside, as well as satellite offices in O’Leary and Souris.