<SEC-DOCUMENT>0001398344-25-002897.txt : 20250214
<SEC-HEADER>0001398344-25-002897.hdr.sgml : 20250214
<ACCEPTANCE-DATETIME>20250214160503
ACCESSION NUMBER:		0001398344-25-002897
CONFORMED SUBMISSION TYPE:	SCHEDULE 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250214
DATE AS OF CHANGE:		20250214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MFS HIGH YIELD MUNICIPAL TRUST
		CENTRAL INDEX KEY:			0000809844
		ORGANIZATION NAME:           	
		IRS NUMBER:				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:		25628230

	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:           	
		IRS NUMBER:				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>0001504304-24-000002</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>5</amendmentNo>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <dateOfEvent>12/31/2024</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:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02199</com:zipCode>
        </address>
      </issuerInfo>
      <authorizedPersons>
        <notificationInfo>
          <personName>Bill Demo</personName>
          <personPhoneNum>201 881-7108</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>24200.00</soleVotingPower>
        <sharedVotingPower>2852702.00</sharedVotingPower>
        <soleDispositivePower>24200.00</soleDispositivePower>
        <sharedDispositivePower>2852702.00</sharedDispositivePower>
        <aggregateAmountOwned>2876902.00</aggregateAmountOwned>
        <isAggregateExcludeShares>N</isAggregateExcludeShares>
        <percentOfClass>11.29</percentOfClass>
        <typeOfReportingPerson>IA</typeOfReportingPerson>
      </reportingPersonInfo>
      <reportingPersonInfo>
        <reportingPersonNoCIK>Y</reportingPersonNoCIK>
        <reportingPersonName>Phillip Goldstein</reportingPersonName>
        <fundType>WC</fundType>
        <legalProceedings>N</legalProceedings>
        <citizenshipOrOrganization>X1</citizenshipOrOrganization>
        <soleVotingPower>24200.00</soleVotingPower>
        <sharedVotingPower>2852702.00</sharedVotingPower>
        <soleDispositivePower>24200.00</soleDispositivePower>
        <sharedDispositivePower>2852702.00</sharedDispositivePower>
        <aggregateAmountOwned>2876902.00</aggregateAmountOwned>
        <isAggregateExcludeShares>N</isAggregateExcludeShares>
        <percentOfClass>11.29</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>2573197.00</sharedVotingPower>
        <soleDispositivePower>0.00</soleDispositivePower>
        <sharedDispositivePower>2573197.00</sharedDispositivePower>
        <aggregateAmountOwned>2573197.00</aggregateAmountOwned>
        <isAggregateExcludeShares>N</isAggregateExcludeShares>
        <percentOfClass>10.09</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:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02199</com:zipCode>
        </issuerPrincipalAddress>
        <commentText>This Constitutes Amendment #5 to the schedule 13D filed July 17, 2023. Except as specifically set forth herein, the schedule 13D remains 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 February 12, 2025, Bulldog Investors, LLP is deemed to be the beneficial owner of 2,876,902 shares of CMU (representing 11.29% 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 February 12, 2025, Mr. Goldstein is deemed to be the beneficial owner of 2,876,902 shares of CMU (representing 11.29% of CMU's outstanding shares) and Mr. Dakos is deemed to be the beneficial owner of 2,573,197 shares of CMU (representing 10.09% 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 tlo dispose of and vote 24,200 shares. Bulldog Investors, LLP has shared power to dispose and vote 2,852,702 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>On November 8, 2024 shareholders of a registered closed-end investment company approved an investment advisory agreement with Bulldog Investors. Shares of CMU held by such investment company are included in this filing. During the last 60 days the following shares of CMU were purchased.

Date                      Shares                   Price
12/12/2024         300                          3.6300
12/26/2024         26,000                    3.4765
12/27/2024         29,000                   3.5072
12/30/2024        27,500                    3.5062
12/31/2024        38,500                    3.5200
12/31/2024        2,968                      3.5100
1/2/2025            19,201                    3.5300
1/8/2025            3,000                      3.5256
1/23/2025         50,000                    3.4979
1/24/2025         16,000                    3.5023
1/27/2025         22,364                    3.5108
1/28/2025         14,202                    3.5175
1/29/2025         29,259                    3.5167
2/11/2025         3,156                      3.5576
2/12/2025         7,928                      3.5300</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>02/13/2025</date>
        </signatureDetails>
      </signaturePerson>
      <signaturePerson>
        <signatureReportingPerson>Phillip Goldstein</signatureReportingPerson>
        <signatureDetails>
          <signature>/s/ Phillip Goldstein</signature>
          <title>Phillip Goldstein, Partner</title>
          <date>02/13/2025</date>
        </signatureDetails>
      </signaturePerson>
      <signaturePerson>
        <signatureReportingPerson>Andrew Dakos</signatureReportingPerson>
        <signatureDetails>
          <signature>/s/ Andrew Dakos</signature>
          <title>Andrew Dakos, Partner</title>
          <date>02/13/2025</date>
        </signatureDetails>
      </signaturePerson>
    </signatureInfo>
  </formData>
</edgarSubmission>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
