<SEC-DOCUMENT>0001398344-25-017036.txt : 20250828
<SEC-HEADER>0001398344-25-017036.hdr.sgml : 20250828
<ACCEPTANCE-DATETIME>20250828160502
ACCESSION NUMBER:		0001398344-25-017036
CONFORMED SUBMISSION TYPE:	SCHEDULE 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250828
DATE AS OF CHANGE:		20250828

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:		251273334

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13D" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>SCHEDULE 13D/A</submissionType>
    <previousAccessionNumber>0001504304-24-000003</previousAccessionNumber>
    <filerInfo>
      <filer>
        <filerCredentials>
          <!-- Field: Pseudo-Tag; ID: Name; Data: Bulldog Investors, LLP -->
          <cik>0001504304</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <amendmentNo>7</amendmentNo>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <dateOfEvent>08/26/2025</dateOfEvent>
      <previouslyFiledFlag>false</previouslyFiledFlag>
      <issuerInfo>
        <issuerCIK>0000809844</issuerCIK>
        <issuerCUSIP>59318E102</issuerCUSIP>
        <issuerName>MFS High Yield Municipal Trust</issuerName>
        <address>
          <com:street1>111 Huntington Avenue</com:street1>
          <com:street2>24th Floor</com:street2>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02199</com:zipCode>
        </address>
      </issuerInfo>
      <authorizedPersons>
        <notificationInfo>
          <personName>Phillip Goldstein</personName>
          <personPhoneNum>914 747-5262</personPhoneNum>
          <personAddress>
            <com:street1>250 Pehle Ave.</com:street1>
            <com:street2>Suite 708</com:street2>
            <com:city>Saddle Brook</com:city>
            <com:stateOrCountry>NJ</com:stateOrCountry>
            <com:zipCode>07663</com:zipCode>
          </personAddress>
        </notificationInfo>
      </authorizedPersons>
    </coverPageHeader>
    <reportingPersons>
      <reportingPersonInfo>
        <reportingPersonCIK>0001504304</reportingPersonCIK>
        <reportingPersonNoCIK>N</reportingPersonNoCIK>
        <reportingPersonName>Bulldog Investors, LLP</reportingPersonName>
        <fundType>WC</fundType>
        <legalProceedings>N</legalProceedings>
        <citizenshipOrOrganization>DE</citizenshipOrOrganization>
        <soleVotingPower>109810.00</soleVotingPower>
        <sharedVotingPower>2896773.00</sharedVotingPower>
        <soleDispositivePower>109810.00</soleDispositivePower>
        <sharedDispositivePower>2896773.00</sharedDispositivePower>
        <aggregateAmountOwned>3006546.00</aggregateAmountOwned>
        <isAggregateExcludeShares>N</isAggregateExcludeShares>
        <percentOfClass>11.79</percentOfClass>
        <typeOfReportingPerson>IA</typeOfReportingPerson>
      </reportingPersonInfo>
      <reportingPersonInfo>
        <reportingPersonNoCIK>Y</reportingPersonNoCIK>
        <reportingPersonName>Phillip Goldstein</reportingPersonName>
        <fundType>WC</fundType>
        <legalProceedings>N</legalProceedings>
        <citizenshipOrOrganization>X1</citizenshipOrOrganization>
        <soleVotingPower>109810.00</soleVotingPower>
        <sharedVotingPower>3223158.00</sharedVotingPower>
        <soleDispositivePower>109810.00</soleDispositivePower>
        <sharedDispositivePower>3223158.00</sharedDispositivePower>
        <aggregateAmountOwned>3342968.00</aggregateAmountOwned>
        <isAggregateExcludeShares>N</isAggregateExcludeShares>
        <percentOfClass>13.11</percentOfClass>
        <typeOfReportingPerson>IN</typeOfReportingPerson>
      </reportingPersonInfo>
      <reportingPersonInfo>
        <reportingPersonNoCIK>Y</reportingPersonNoCIK>
        <reportingPersonName>Andrew Dakos</reportingPersonName>
        <fundType>WC</fundType>
        <legalProceedings>N</legalProceedings>
        <citizenshipOrOrganization>X1</citizenshipOrOrganization>
        <soleVotingPower>0.00</soleVotingPower>
        <sharedVotingPower>2896773.00</sharedVotingPower>
        <soleDispositivePower>0.00</soleDispositivePower>
        <sharedDispositivePower>2896773.00</sharedDispositivePower>
        <aggregateAmountOwned>2896773.00</aggregateAmountOwned>
        <isAggregateExcludeShares>N</isAggregateExcludeShares>
        <percentOfClass>11.36</percentOfClass>
        <typeOfReportingPerson>IN</typeOfReportingPerson>
      </reportingPersonInfo>
    </reportingPersons>
    <items1To7>
      <item1>
        <securityTitle>Common Stock</securityTitle>
        <issuerName>MFS High Yield Municipal Trust</issuerName>
        <issuerPrincipalAddress>
          <com:street1>111 Huntington Avenue</com:street1>
          <com:street2>24th Floor</com:street2>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02199</com:zipCode>
        </issuerPrincipalAddress>
        <commentText>This Constitutes Amendment #7 to the schedule 13D filed July 17, 2023. Except as specifically set forth herein, the schedule 13D rmains unmodified.</commentText>
      </item1>
      <item5>
        <percentageOfClassSecurities>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 August 27, 2025, Bulldog Investors, LLP is deemed to be the beneficial owner of 3,006,546 shares of CMU (representing 11.79% 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 August 27, 2025, Mr. Goldstein is deemed to be the beneficial owner of 3,342,968 shares of CMU (representing 13.11% of CMU's outstanding shares) and Mr. Dakos is deemed to be the beneficial owner of 2,896,773 shares of CMU (representing 11.36% of CMU's outstanding shares) by virtue of their power to direct the vote of, and dispose of, these shares.</percentageOfClassSecurities>
        <numberOfShares>Bulldog Investors, LLP has sole power to dispose of and vote 109,810 shares. Bulldog Investors, LLP has shared power to dispose and vote 2,896,773 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.</numberOfShares>
        <transactionDesc>Since the last  filing on 7/16/25 the following shares of CMU were purchased.
Date                      Shares                   Price
8/27/2025            10,000                  3.2800
8/26/2025           20,000                   3.2783
8/22/2025           30,000                   3.2800
8/21/2025           10,000                   3.2667
8/20/2025           18,710                   3.2860
8/19/2025            4,976                    3.2798
8/18/2025            11,810                  3.3279
8/08/2025            10,000                  3.3200
8/05/2025            100                        3.3100
8/04/2025            7,210                    3.3098
8/01/2025            20,119                  3.3093
7/31/2025            12,182                  3.2700
7/29/2025             316                       3.2500
7/28/2025             900                       3.2400
7/25/2025             6,152                   3.2400
7/24/2025             40,000                 3.2400
7/23/2025             40,862                 3.2200
7/22/2025             151                       3.2300
7/21/2025             800                       3.2200
7/18/2025             7,310                   3.2188
7/17/2025             16,625                 3.2361</transactionDesc>
        <listOfShareholders>Clients of Bulldog Investors, LLP and the owners of accounts reflected herein are entitled to receive any dividends or sales proceeds.</listOfShareholders>
      </item5>
    </items1To7>
    <signatureInfo>
      <signaturePerson>
        <signatureReportingPerson>Bulldog Investors, LLP</signatureReportingPerson>
        <signatureDetails>
          <signature>/s/ Andrew Dakos</signature>
          <title>Andrew Dakos, Partner</title>
          <date>08/28/2025</date>
        </signatureDetails>
      </signaturePerson>
      <signaturePerson>
        <signatureReportingPerson>Phillip Goldstein</signatureReportingPerson>
        <signatureDetails>
          <signature>/s/ Phillip Goldstein</signature>
          <title>Phillip Goldstein, Partner</title>
          <date>08/28/2025</date>
        </signatureDetails>
      </signaturePerson>
      <signaturePerson>
        <signatureReportingPerson>Andrew Dakos</signatureReportingPerson>
        <signatureDetails>
          <signature>/s/ Andrew Dakos</signature>
          <title>Andrew Dakos, Partner</title>
          <date>08/28/2025</date>
        </signatureDetails>
      </signaturePerson>
    </signatureInfo>
  </formData>
</edgarSubmission>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
