0001398344-26-007324.txt : 20260427 0001398344-26-007324.hdr.sgml : 20260427 20260427163957 ACCESSION NUMBER: 0001398344-26-007324 CONFORMED SUBMISSION TYPE: SCHEDULE 13D/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20260427 DATE AS OF CHANGE: 20260427 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: MFS HIGH YIELD MUNICIPAL TRUST CENTRAL INDEX KEY: 0000809844 ORGANIZATION NAME: EIN: 042950868 STATE OF INCORPORATION: MA FISCAL YEAR END: 1130 FILING VALUES: FORM TYPE: SCHEDULE 13D/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-84331 FILM NUMBER: 26901641 BUSINESS ADDRESS: STREET 1: 111 HUNTINGTON AVENUE STREET 2: 24TH FLOOR CITY: BOSTON STATE: MA ZIP: 02199 BUSINESS PHONE: 617-954-5000 MAIL ADDRESS: STREET 1: 111 HUNTINGTON AVENUE STREET 2: 24TH FLOOR CITY: BOSTON STATE: MA ZIP: 02199 FORMER COMPANY: FORMER CONFORMED NAME: COLONIAL MUNICIPAL INCOME TRUST DATE OF NAME CHANGE: 19920703 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: Bulldog Investors, LLP CENTRAL INDEX KEY: 0001504304 ORGANIZATION NAME: EIN: 270926182 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SCHEDULE 13D/A BUSINESS ADDRESS: STREET 1: PARK 80 WEST - PLAZA TWO STREET 2: 250 PEHLE AVE. SUITE 708 CITY: SADDLE BROOK STATE: NJ ZIP: 07663 BUSINESS PHONE: 201 556-0092 MAIL ADDRESS: STREET 1: PARK 80 WEST - PLAZA TWO STREET 2: 250 PEHLE AVE. SUITE 708 CITY: SADDLE BROOK STATE: NJ ZIP: 07663 FORMER COMPANY: FORMER CONFORMED NAME: Bulldog Investors, LLC DATE OF NAME CHANGE: 20130610 FORMER COMPANY: FORMER CONFORMED NAME: Brooklyn Capital Management LLC DATE OF NAME CHANGE: 20101026 SCHEDULE 13D/A 1 primary_doc.xml X0202 SCHEDULE 13D/A 0001504304-23-000019 0001504304 XXXXXXXX LIVE 11 Common Stock 04/23/2026 false 0000809844 59318E102 MFS High Yield Municipal Trust

111 Huntington Avenue Boston MA 02199

Phillip Goldstein 914 747-5262 250 Pehle Ave. Suite 708 Saddle Brook NJ 07663 0001504304 N Bulldog Investors, LLP WC N DE 120488.00 2693673.00 120488.00 2693673.00 2814161.00 N 11.04 IA Y Phillip Goldstein WC N X1 120488.00 3076658.00 120488.00 3076658.00 3197146.00 N 12.54 IN Y Andrew Dakos WC N X1 0.00 2699273.00 0.00 2699273.00 2699273.00 N 10.59 IN Common Stock MFS High Yield Municipal Trust 111 Huntington Avenue Boston MA 02199 This Constitutes Amendment #11 to the schedule 13D filed July 17, 2023. Except as specifically set forth herein, the schedule 13D remains unmodified. As per the N-CSR filed on 1/23/26 there were 25,492,782 shares of common stock outstanding as of 11/30/25. The percentages set forth herein were derived using such number. Phillip Goldstein and Andrew Dakos own Bulldog Investors, LLP, a registered investment advisor. As of April 23, 2026, Bulldog Investors, LLP is deemed to be the beneficial owner of 2,814,161 shares of CMU (representing 11.04% of CMU's outstanding shares) solely by virtue of Bulldog Investors, LLP's power to direct the vote of, and dispose of, these shares. As of April 23, 2026, Mr. Goldstein is deemed to be the beneficial owner of 3,197,146 shares of CMU (representing 12.54% of CMU's outstanding shares) and Mr. Dakos is deemed to be the beneficial owner of 2,699,273 shares of CMU (representing 10.59% of CMU's outstanding shares) by virtue of their power to direct the vote of, and dispose of, these shares. Bulldog Investors, LLP has sole power to dispose of and vote 120,488 shares. Bulldog Investors, LLP has shared power to dispose and vote 2,693,673 shares. Certain of Bulldog Investors, LLP's clients (none of whom beneficially own more than 5% of CMU's shares) share this power with Bulldog Investors. Messrs. Goldstein and Dakos are partners of Bulldog Investors, LLP. Since the last filing on 4/9/26 the following shares of CMU were sold. Date Shares Price 4/23/2026 (20,694) 3.6676 4/22/2026 (24,260) 3.6600 4/21/2026 (35,000) 3.6752 4/20/2026 (22,500) 3.6700 4/17/2026 (1,500) 3.6800 4/16/2026 (2,571) 3.6700 4/15/2026 (110,000) 3.6700 4/14/2026 (5,192) 3.6600 Clients of Bulldog Investors, LLP and the owners of accounts reflected herein are entitled to receive any dividends or sales proceeds. N/A None None Bulldog Investors, LLP /s/ Andrew Dakos 04/24/2026 Phillip Goldstein /s/ Phillip Goldstein 04/24/2026 Andrew Dakos /s/ Andrew Dakos 04/24/2026