<SEC-DOCUMENT>0000764532-25-000003.txt : 20250214
<SEC-HEADER>0000764532-25-000003.hdr.sgml : 20250214
<ACCEPTANCE-DATETIME>20250214115224
ACCESSION NUMBER:		0000764532-25-000003
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250214
DATE AS OF CHANGE:		20250214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TRIMAS CORP
		CENTRAL INDEX KEY:			0000842633
		STANDARD INDUSTRIAL CLASSIFICATION:	METAL FORGING & STAMPINGS [3460]
		ORGANIZATION NAME:           	04 Manufacturing
		IRS NUMBER:				382687639
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-40013
		FILM NUMBER:		25625283

	BUSINESS ADDRESS:	
		STREET 1:		38505 WOODWARD AVENUE
		STREET 2:		SUITE 200
		CITY:			BLOOMFIELD HILLS
		STATE:			MI
		ZIP:			48304
		BUSINESS PHONE:		2486315400

	MAIL ADDRESS:	
		STREET 1:		38505 WOODWARD AVENUE
		STREET 2:		SUITE 200
		CITY:			BLOOMFIELD HILLS
		STATE:			MI
		ZIP:			48304

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIDUCIARY MANAGEMENT INC /WI/
		CENTRAL INDEX KEY:			0000764532
		ORGANIZATION NAME:           	
		IRS NUMBER:				391346018
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G

	BUSINESS ADDRESS:	
		STREET 1:		790 N. WATER STREET
		STREET 2:		SUITE 2100
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53202
		BUSINESS PHONE:		4142264545

	MAIL ADDRESS:	
		STREET 1:		790 N. WATER STREET
		STREET 2:		SUITE 2100
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53202
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G
<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</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0000764532</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>12/31/2024</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0000842633</issuerCik>
        <issuerName>TRIMAS CORP</issuerName>
        <issuerCusip>896215209</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <com:street1>38505 WOODWARD AVENUE</com:street1>
          <com:street2>SUITE 200</com:street2>
          <com:city>BLOOMFIELD HILLS</com:city>
          <com:stateOrCountry>MI</com:stateOrCountry>
          <com:zipCode>48304</com:zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
    </coverPageHeader>
    <coverPageHeaderReportingPersonDetails>

      <reportingPersonName>FIDUCIARY MANAGEMENT INC /WI/</reportingPersonName>
      <citizenshipOrOrganization>WI</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>2403058.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>2610861.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>2610861.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <classPercent>6.4</classPercent>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>TRIMAS CORP</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>38505 WOODWARD AVENUE, SUITE 200, BLOOMFIELD HILLS, MICHIGAN, 48304</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>Fiduciary Management, Inc.</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>790 N. Water Street
Suite #2100
Milwaukee, WI  53202
United States</principalBusinessOfficeOrResidenceAddress>
        <citizenship>Wisconsin</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>N</notApplicableFlag>
        <typeOfPersonFiling>IA</typeOfPersonFiling>
      </item3>
      <item4>
        <amountBeneficiallyOwned>2610861</amountBeneficiallyOwned>
        <classPercent>6.44</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>2403058</solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>0</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>2610861</solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>0</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>Y</notApplicableFlag>
        <classOwnership5PercentOrLess>N</classOwnership5PercentOrLess>
      </item5>
      <item6>
        <notApplicableFlag>Y</notApplicableFlag>
      </item6>
      <item7>
        <notApplicableFlag>Y</notApplicableFlag>
      </item7>
      <item8>
        <notApplicableFlag>Y</notApplicableFlag>
      </item8>
      <item9>
        <notApplicableFlag>Y</notApplicableFlag>
      </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 &amp;#167; 240.14a-11.

</certifications>
      </item10>
    </items>
    <signatureInformation>
      <reportingPersonName>FIDUCIARY MANAGEMENT INC /WI/</reportingPersonName>
      <signatureDetails>
        <signature>Jessica Taske</signature>
        <title>Vice President</title>
        <date>02/14/2025</date>
      </signatureDetails>
    </signatureInformation>
  </formData>
</edgarSubmission>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
