Sun Life Financial Inc (TSX: SLF) is a financial service company that provides products and assistance regarding insurance, investments, financial planning and wealth management. It is one of Canada's largest life insurance companies, also often referred to as ‘Big Three’, along with Great West Life and Manulife. Founded by politician and financier Matthew Hamilton Gault in 1865, Sun Life Financial caters to a wide customer base across Canada, the United States, the United Kingdom, Asia, etc.