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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-07-25</periodOfReport>

    <notSubjectToSection16>true</notSubjectToSection16>

    <issuer>
        <issuerCik>0000915358</issuerCik>
        <issuerName>SIGMATRON INTERNATIONAL INC</issuerName>
        <issuerTradingSymbol>SGMA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001192487</rptOwnerCik>
            <rptOwnerName>VYAS DILIP S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SIGMATRON INTERNATIONAL INC.</rptOwnerStreet1>
            <rptOwnerStreet2>2201 LANDMEIER RD</rptOwnerStreet2>
            <rptOwnerCity>ELK GROVE VILLAGE</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60007</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-07-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>U</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>32000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.02</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Disposed of pursuant to an Agreement and Plan of Merger (the &quot;Merger Agreement&quot;), dated as of May 20, 2025, by and among SigmaTron International, Inc. (the &quot;Company&quot;), Transom Axis AcquireCo, LLC (&quot;Parent&quot;) and Transom Axis MergerSub, Inc. (&quot;Merger Sub&quot;). Pursuant to the Merger Agreement, Parent and MergerSub launched a tender offer (the &quot;Offer&quot;) for all outstanding shares of common stock of the Company (the &quot;Shares&quot;) for an offer price of $3.02 per share in cash, without interest and less any required tax withholding (the &quot;Offer Consideration&quot;). On July 25, 2025 (the &quot;Acceptance Time&quot;), Merger Sub accepted all of the Shares that were validly tendered and not properly withdrawn pursuant to the Offer as of the Acceptance Time, including the Shares tendered by the reporting person, in exchange for the Offer Consideration.</footnote>
    </footnotes>

    <remarks>Exhibit 24.1 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Gary R. Fairhead, as Attorney-in-Fact for Dilip Vyas</signatureName>
        <signatureDate>2025-07-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
