MFS Investment Management (“MFS”) announced today that the reorganization of MFS High Income Municipal Trust (NYSE: CXE), MFS High Yield Municipal Trust (NYSE: CMU), and MFS Investment Grade Municipal Trust (NYSE: CXH) (each a “Target Fund” and collectively, the “Target Funds”) into MFS Municipal Income Trust (NYSE: MFM) (the “Surviving Fund”) (each a “Reorganization” and collectively, the “Reorganizations”) will be completed by the open of business on the New York Stock Exchange (“NYSE”) on Monday, June 8, 2026, subject to the satisfaction of certain closing conditions.

To facilitate the Reorganizations, all shares of each Target Fund will cease trading on the NYSE as of market close on Friday, June 5, 2026, and each Target Fund’s shareholders will be issued newly issued common shares of the Surviving Fund. The aggregate net asset value (“NAV”) of such shares will equal the aggregate NAV (not the market value) of the common shares of the Target Fund held immediately prior to the applicable Reorganization.