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

    <schemaVersion>X0304</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2012-03-02</periodOfReport>

    <issuer>
        <issuerCik>0001386198</issuerCik>
        <issuerName>MEMSIC Inc</issuerName>
        <issuerTradingSymbol>MEMS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001421510</rptOwnerCik>
            <rptOwnerName>Yang David</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE TECH DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2>STE 325</rptOwnerStreet2>
            <rptOwnerCity>ANDOVER</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01810</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2012-03-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>30000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>925000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Restricted stock units representing a contingent right to receive one share of MEMSIC common stock. The units vest in three equal annual installments beginning March 2, 2013.</footnote>
        <footnote id="F2">Includes 462,500 shares held by Asia Pacific Genesis Venture Capital Fund, L.P., 128,000 shares held by C&amp;D Capital Corp., 113,500 shares held by Global Vision Venture Capital Co., Ltd., 62,500 shares held by Asia Pacific Century Venture Capital LTD 47,500 shares held by China Power Venture Capital Co., Ltd., 26,500 shares held by Nien Hsing International (Bermuda) Ltd., 21,500 shares held by Asiagroup Worldwide Limited, 17,500 shares held by STAR Pacific Worldwide Limited, 16,500 shares held by A&amp;D Capital Corp., 16,500 shares held by J&amp;D Capital Corp., and 12,500 shares held by CAM-CID Asia Pacific Investment Corp. The CID Group and its affiliates have entered into investment management agreements to manage the investment direction of these entities' funds. (Continued in Footnote 3)</footnote>
        <footnote id="F3">(Continued from Footnote 2) Steven Chang, managing partner of The CID Group, and David Yang, a partner of The CID Group, share voting and dispositive power over shares held by these entities. Mr. Yang disclaims beneficial ownership in all shares except to the extent of his pecuniary interest therein, if any.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ David Yang</signatureName>
        <signatureDate>2012-03-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
