SCHEDULE 13G/A

MFS INVT GRADE MUN TR

Common Stock · CUSIP: 59318B108

Event date: 2025-12-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Bulldog Investors, LLP

  Shares: 1,209,033.00 · Class: 14.75%

• Phillip Goldstein

  Shares: 1,384,095.00 · Class: 16.88%

• Andrew Dakos

  Shares: 1,203,765.00 · Class: 14.68%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.