<SEC-DOCUMENT>0000904454-25-000541.txt : 20251030
<SEC-HEADER>0000904454-25-000541.hdr.sgml : 20251030
<ACCEPTANCE-DATETIME>20251030194215
ACCESSION NUMBER:		0000904454-25-000541
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20251028
FILED AS OF DATE:		20251030
DATE AS OF CHANGE:		20251030

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Daly Stephen G
		CENTRAL INDEX KEY:			0001330184
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35451
		FILM NUMBER:		251437571

	MAIL ADDRESS:	
		STREET 1:		100 CHELMSFORD STREET
		CITY:			LOWELL
		STATE:			MA
		ZIP:			01851

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MACOM Technology Solutions Holdings, Inc.
		CENTRAL INDEX KEY:			0001493594
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				270306875
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1003

	BUSINESS ADDRESS:	
		STREET 1:		100 CHELMSFORD STREET
		CITY:			LOWELL
		STATE:			MA
		ZIP:			01851
		BUSINESS PHONE:		(978) 656-2500

	MAIL ADDRESS:	
		STREET 1:		100 CHELMSFORD STREET
		CITY:			LOWELL
		STATE:			MA
		ZIP:			01851

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	M/A-COM Technology Solutions Holdings, Inc.
		DATE OF NAME CHANGE:	20100607
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-10-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001493594</issuerCik>
        <issuerName>MACOM Technology Solutions Holdings, Inc.</issuerName>
        <issuerTradingSymbol>MTSI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001330184</rptOwnerCik>
            <rptOwnerName>Daly Stephen G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS</rptOwnerStreet1>
            <rptOwnerStreet2>100 CHELMSFORD STREET</rptOwnerStreet2>
            <rptOwnerCity>LOWELL</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01851</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-10-28</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>11071</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>32577</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents restricted stock units (&quot;RSUs&quot;) granted to the Reporting Person under the Issuer's 2021 Omnibus Incentive Plan. Each RSU represents the contingent right to receive one share of Common Stock. The RSUs vest as to 3,690 shares on 10/28/2026, 3,690 shares on 10/28/2027 and 3,691 shares on 10/28/2028, provided that the Reporting Person remains in continuous service with the Issuer through each such vesting date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Ambra R. Roth, Attorney-in-Fact</signatureName>
        <signatureDate>2025-10-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
