Great Lakes Higher Education Corporation is one of the largest student loan providers and guarantors in the United States. Headquartered in Madison, Wisconsin, the corporation is a non-profit. The company sometimes gives education-related grants, with a focus on increasing access to higher education. Nationally, Great Lakes guarantees $51 billion in loans under FFELP, and works with 6,000 schools, 1,100 lenders and 10,000,000 borrowers.