<SEC-DOCUMENT>0001398344-25-020988.txt : 20251114
<SEC-HEADER>0001398344-25-020988.hdr.sgml : 20251114
<ACCEPTANCE-DATETIME>20251114160506
ACCESSION NUMBER:		0001398344-25-020988
CONFORMED SUBMISSION TYPE:	SCHEDULE 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251114
DATE AS OF CHANGE:		20251114

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:		251485765

	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>0001398344-25-017036</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>8</amendmentNo>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <dateOfEvent>11/12/2025</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>3185308.00</sharedVotingPower>
        <soleDispositivePower>109810.00</soleDispositivePower>
        <sharedDispositivePower>3185308.00</sharedDispositivePower>
        <aggregateAmountOwned>3295118.00</aggregateAmountOwned>
        <isAggregateExcludeShares>N</isAggregateExcludeShares>
        <percentOfClass>12.93</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>3521693.00</sharedVotingPower>
        <soleDispositivePower>109810.00</soleDispositivePower>
        <sharedDispositivePower>3521693.00</sharedDispositivePower>
        <aggregateAmountOwned>3631503.00</aggregateAmountOwned>
        <isAggregateExcludeShares>N</isAggregateExcludeShares>
        <percentOfClass>14.25</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>3185308.00</sharedVotingPower>
        <soleDispositivePower>0.00</soleDispositivePower>
        <sharedDispositivePower>3185308.00</sharedDispositivePower>
        <aggregateAmountOwned>3185308.00</aggregateAmountOwned>
        <isAggregateExcludeShares>N</isAggregateExcludeShares>
        <percentOfClass>12.49</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 #8 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-CSRS filed on 7/28/25 there were 25,492,782 shares of common stock outstanding as of 5/31/25. 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 November 12 2025, Bulldog Investors, LLP is deemed to be the beneficial owner of 3,295,118 shares of CMU (representing 12.93% 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 November 12 2025, Mr. Goldstein is deemed to be the beneficial owner of 3,631,503 shares of CMU (representing 14.25% of CMU's outstanding shares) and Mr. Dakos is deemed to be the beneficial owner of 3,185,308 shares of CMU (representing 12.49% 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 3,185,308 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>During the last 60 days the following shares of CMU were purchased or sold.

Date                      Shares                   Price
11/12/2025           35,000                  3.5172
11/11/2025           45,000                   3.5200
11/07/2025           20,000                  3.5100
11/06/2025           11,500                   3.5194
11/04/2025           10,272                  3.5083
11/03/2025            10,000                  3.5000
10/30/2025            12,870                 3.5100
10/29/2025            2,062                   3.5100
10/16/2025            20,000                  3.4800
10/16/2025           (5,000)                   3.4700
10/10/2025            6,744                   3.4700
10/06/2025           600                       3.4400
10/03/2025            1,102                    3.4400
10/01/2025            20,000                  3.4599
9/29/2025             218                        3.4300
9/23/2025             100                       3.4500
9/22/2025            1,041                    3.4500
9/19/2025             9,800                   3.4400
9/18/2025             16,795                  3.4500
9/17/2025            800                        3.4400
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>11/13/2025</date>
        </signatureDetails>
      </signaturePerson>
      <signaturePerson>
        <signatureReportingPerson>Phillip Goldstein</signatureReportingPerson>
        <signatureDetails>
          <signature>/s/ Phillip Goldstein</signature>
          <title>Phillip Goldstein</title>
          <date>11/13/2025</date>
        </signatureDetails>
      </signaturePerson>
      <signaturePerson>
        <signatureReportingPerson>Andrew Dakos</signatureReportingPerson>
        <signatureDetails>
          <signature>/s/ Andrew Dakos</signature>
          <title>Andrew Dakos</title>
          <date>11/13/2025</date>
        </signatureDetails>
      </signaturePerson>
    </signatureInfo>
  </formData>
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</DOCUMENT>
</SEC-DOCUMENT>
