MFS Investment Grade Municipal Trust operates as a diversified, closed-end management investment company. The trust invests primarily in the investment grade municipal bonds issued by the states of California, Florida, Illinois, Massachusetts, New York, and Texas, as well as their respective political subdivisions, agencies, and public authorities. Its investment portfolio comprises investments in education, financial, healthcare, industrials, forest products, manufacturing, energy, hotel and recreation, utilities, and transportation sectors. Columbia Management Advisors, LLC serves as the investment advisor of the trust. MFS Investment Grade Municipal Trust was founded in 1989 and is based in Boston, Massachusetts.