The Guardian Life Insurance Company of America is one of the largest mutual life insurance companies in the world. Based in Manhattan, it has approximately 8,000 employees in the United States and a network of over 3,000 financial representatives in more than 70 agencies nationwide. As of 2018, it ranks 239th on the Fortune 500 list of largest American corporations by revenue. In 2015, Guardian achieved the highest earnings in its 155-year history with $7.3 billion in capital and $1.5 billion in operating costs. Founded in Manhattan in 1860, the company offers a wide range of insurance products and services, including life insurance, disability income insurance, annuities, investments, and dental and vision insurance coverage.