<SEC-DOCUMENT>0001398344-25-018955.txt : 20251007
<SEC-HEADER>0001398344-25-018955.hdr.sgml : 20251007
<ACCEPTANCE-DATETIME>20251007154331
ACCESSION NUMBER:		0001398344-25-018955
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251007
DATE AS OF CHANGE:		20251007

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 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-84331
		FILM NUMBER:		251379690

	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:			RIVERNORTH CAPITAL MANAGEMENT, LLC
		CENTRAL INDEX KEY:			0001447578
		ORGANIZATION NAME:           	
		EIN:				271560688
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		360 S. ROSEMARY AVE
		STREET 2:		SUITE 1420
		CITY:			WEST PALM BEACH
		STATE:			FL
		ZIP:			33401
		BUSINESS PHONE:		561-484-7185

	MAIL ADDRESS:	
		STREET 1:		360 S. ROSEMARY AVE
		STREET 2:		SUITE 1420
		CITY:			WEST PALM BEACH
		STATE:			FL
		ZIP:			33401

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RIVERNORTH CAPITAL MANAGEMENT, INC.
		DATE OF NAME CHANGE:	20081009
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13g" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>SCHEDULE 13G/A</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <!-- Field: Pseudo-Tag; ID: Name; Data: RIVERNORTH CAPITAL MANAGEMENT, LLC -->
          <cik>0001447578</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <amendmentNo>2</amendmentNo>
      <securitiesClassTitle>Shares of Beneficial Interest</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>09/30/2025</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0000809844</issuerCik>
        <issuerName>MFS HIGH YIELD MUNICIPAL TRUST</issuerName>
        <issuerCusip>59318E102</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <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>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
    </coverPageHeader>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>RIVERNORTH CAPITAL MANAGEMENT, LLC</reportingPersonName>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>2579075.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>2579075.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>2579075.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>10.12</classPercent>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>MFS HIGH YIELD MUNICIPAL TRUST</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>111 HUNTINGTON AVENUE, 24TH FLOOR, BOSTON, MA, 02199</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>RiverNorth Capital Management, LLC</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>360 S. Rosemary Avenue, Ste. 1420
West Palm Beach, Florida 33401</principalBusinessOfficeOrResidenceAddress>
        <citizenship>Delaware</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>N</notApplicableFlag>
        <typeOfPersonFiling>IA</typeOfPersonFiling>
      </item3>
      <item4>
        <amountBeneficiallyOwned>2,579,075</amountBeneficiallyOwned>
        <classPercent>10.12</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>2,579,075</solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>0</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>2,579,075</solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>0</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>Y</notApplicableFlag>
      </item5>
      <item6>
        <notApplicableFlag>N</notApplicableFlag>
        <ownershipMoreThan5PercentOnBehalfOfAnotherPerson>Other persons have the right to receive the proceeds from the sale of the securities reported herein.</ownershipMoreThan5PercentOnBehalfOfAnotherPerson>
      </item6>
      <item7>
        <notApplicableFlag>N</notApplicableFlag>
        <subsidiaryIdentificationAndClassification>Not applicable.</subsidiaryIdentificationAndClassification>
      </item7>
      <item8>
        <notApplicableFlag>N</notApplicableFlag>
        <identificationAndClassificationOfGroupMembers>Not applicable.</identificationAndClassificationOfGroupMembers>
      </item8>
      <item9>
        <notApplicableFlag>N</notApplicableFlag>
        <groupDissolutionNotice>Not applicable.</groupDissolutionNotice>
      </item9>
      <item10>
        <notApplicableFlag>N</notApplicableFlag>
        <certifications>By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.</certifications>
      </item10>
    </items>
    <signatureInformation>
      <reportingPersonName>RIVERNORTH CAPITAL MANAGEMENT, LLC</reportingPersonName>
      <signatureDetails>
        <signature>/s/ Marcus Collins</signature>
        <title>Marcus Collins, General Counsel and Chief Compliance Officer</title>
        <date>10/07/2025</date>
      </signatureDetails>
    </signatureInformation>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
