<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-11-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001895249</issuerCik>
        <issuerName>ConnectM Technology Solutions, Inc.</issuerName>
        <issuerTradingSymbol>CNTM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002028722</rptOwnerCik>
            <rptOwnerName>Panigrahi Bhaskar</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CONNECTM TECHNOLOGY SOLUTIONS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>2 MOUNT ROYAL AVE., SUITE 550</rptOwnerStreet2>
            <rptOwnerCity>MARLBOROUGH</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01752</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>See Remarks</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-11-28</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2025-11-28</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>194900</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.22</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4616453</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-11-28</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2025-11-28</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>102500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.24</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4718953</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Avanti Holdings LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person inadvertently failed to timely file Form 4 within the required reporting period. 194,900 shares were purchased on November 28, 2025 on the open market through the Reporting Person's brokerage account and are held in the name of the Reporting Person.</footnote>
        <footnote id="F2">The Reporting Person inadvertently failed to timely file Form 4 within the required reporting period. 102,500 shares were acquired by Avanti Holdings LLC on November 28, 2025 on the open market through the Avanti Holdings LLC brokerage account. These shares are held by Avanti Holdings LLC, of which the Reporting Person is the controlling equity holder. As such, the Reporting Person may be deemed to have beneficial ownership of such shares. The Reporting Person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.</footnote>
        <footnote id="F3">Consists of (i) 3,688,160 shares held by Avanti Holdings LLC, (ii) 900,466 shares held by Mr. Panigrahi and (iii) 127,838 shares held by Southwood Partners LP. Mr. Panigrahi is an equity holder of Avanti Holdings LLC and Southwood Partners LP.</footnote>
    </footnotes>

    <remarks>Chairman of the Board of Directors and Chief Executive Officer</remarks>

    <ownerSignature>
        <signatureName>/s/ Bhaskar Panigrahi, individually and as Managing Member of Avanti Holdings, LLC</signatureName>
        <signatureDate>2025-12-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
