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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D/A 0001504304-24-000003 0001504304 XXXXXXXX LIVE 6 Common Stock 07/15/2025 false 0000809844 59318E102 MFS High Yield Municipal Trust 111 Huntington Avenue Boston MA 02199 Bill Demo (201) 881-7108 250 Pehle Ave. Suite 708 Saddle Brook NJ 07663 0001504304 N Bulldog Investors, LLP WC N DE 24200.00 2671037.00 24200.00 2671037.00 2695237.00 N 10.57 IA Y Phillip Goldstein WC N X1 109810.00 2966641.00 109810.00 2966641.00 3076451.00 N 12.07 IN Y Andrew Dakos WC N X1 0.00 2671037.00 0.00 2671037.00 2671037.00 N 10.48 IN Common Stock MFS High Yield Municipal Trust 111 Huntington Avenue Boston MA 02199 This Constitutes Amendment #6 to the schedule 13D filed July 17, 2023. Except as specifically set forth herein, the schedule 13D rmains unmodified. Bulldog Investors has entered into the Amendment to Standstill Agreement included as an Exhibit hereto. As per the N-CSR filed on 1/27/25 there were 25,492,782 shares of common stock outstanding as of 11/30/24. 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 July 15 2025, Bulldog Investors, LLP is deemed to be the beneficial owner of 2,695,237 shares of CMU (representing 10.57% of CMU's outstanding shares) soley by virtue of Bulldog Investors, LLP's power to direct the vote of, and dispose of, these shares. As of July 15, 2025, Mr. Goldstein is deemed to be the beneficial owner of 3,076,451 shares of CMU (representing 12.07% of CMU's outstanding shares) and Mr. Dakos is deemed to be the beneficial owner of 2,671,037 shares of CMU (representing 10.48% 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 24,200 shares. Bulldog Investors, LLP has shared power to dispose and vote 2,671,037 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. During the last 60 days the following shares of CMU were purchased. Date Shares Price 7/11/2025 10,000 3.2900 Clients of Bulldog Investors, LLP and the owners of accounts reflected herein are entitled to receive any dividends or sales proceeds. N/A None Amendment to Standstill Agreement Bulldog Investors, LLP Andrew Dakos Andrew Dakos, Partner 07/15/2025 Phillip Goldstein Phillip Goldstein Phillip Goldstein, Partner 07/15/2025 Andrew Dakos Andrew Dakos Andrew Dakos, Partner 07/15/2025