SCHEDULE 13G 0001596468 XXXXXXXX LIVE Common Stock 09/30/2025 0000809844 MFS HIGH YIELD MUNICIPAL TRUST 59318E102 111 HUNTINGTON AVENUE 24TH FLOOR BOSTON MA 02199 Rule 13d-1(b) Almitas Capital LLC DE 1507168.00 0.00 1507168.00 0.00 1507168.00 5.9 IA MFS HIGH YIELD MUNICIPAL TRUST 111 HUNTINGTON AVENUE, 24TH FLOOR, BOSTON, MASSACHUSETTS, 02199 Almitas Capital LLC 1460 4th Street, Suite 300 Santa Monica, CA 90401 See Item 4 of the cover page. N IA See Item 9 of the cover page. See Item 11 of the cover page. See Item 5 of the cover page. See Item 6 of the cover page. See Item 7 of the cover page. See Item 8 of the cover page. Y N Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to Investment Advisor is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D. Almitas Capital LLC Ronald Mass 11/14/2025