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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-01-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000101984</issuerCik>
        <issuerName>UNIVERSAL ELECTRONICS INC</issuerName>
        <issuerTradingSymbol>UEIC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001443284</rptOwnerCik>
            <rptOwnerName>Singer Eric</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O IMMERSION CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>2999 N.E. 191ST STREET, SUITE 610</rptOwnerStreet2>
            <rptOwnerCity>AVENTURA</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33180</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001970265</rptOwnerCik>
            <rptOwnerName>TORO 18 HOLDINGS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2999 N.E. 191ST STREET, SUITE 610</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>AVENTURA</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33180</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001058811</rptOwnerCik>
            <rptOwnerName>IMMERSION CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2999 N.E. 191ST STREET, SUITE 610</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>AVENTURA</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33180</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001205885</rptOwnerCik>
            <rptOwnerName>MARTIN WILLIAM C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O IMMERSION CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>2999 N.E. 191ST STREET, SUITE 610</rptOwnerStreet2>
            <rptOwnerCity>AVENTURA</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33180</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2024-01-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>153</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>153</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1544647</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F4"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Group</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F5"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-01-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F7"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This Form 4 is filed jointly by Eric Singer, Toro 18 Holdings LLC (&quot;Toro 18&quot;), Immersion Corporation (&quot;Immersion&quot;) and William C. Martin (collectively, the &quot;Reporting Persons&quot;). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 that collectively beneficially owns over 10% of the Issuer's outstanding shares of Common Stock. Mr. Singer is also a member of the board of directors of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.</footnote>
        <footnote id="F2">Shares of the Issuer's Common Stock awarded on January 1, 2024 to Mr. Singer as pro rata director compensation, which shares are owned directly by Mr. Singer.</footnote>
        <footnote id="F3">Shares of the Issuer's Common Stock owned directly by Mr. Singer.</footnote>
        <footnote id="F4">Shares of the Issuer's Common Stock owned directly by Toro 18. Immersion, as the sole member of Toro 18, may be deemed to beneficially own the shares owned directly by Toro 18. Mr. Martin, as the Chief Strategy Officer of Toro 18, may be deemed to beneficially own the shares owned directly by Toro 18. Mr. Singer, as the President and Chief Executive Officer of Toro 18, may be deemed to beneficially own the securities owned directly by Toro 18.</footnote>
        <footnote id="F5">Each restricted stock unit represents a contingent right to receive one share of the Issuer's Common Stock.</footnote>
        <footnote id="F6">Restricted stock units awarded on January 1, 2024 to Mr. Singer as pro rata director compensation and generally vest and are paid quarterly over a period ending July 1, 2024, which restricted units are owned directly by Mr. Singer.</footnote>
        <footnote id="F7">Restricted Stock Units owned directly by Mr. Singer.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Eric Singer</signatureName>
        <signatureDate>2024-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Toro 18 Holdings LLC, By: /s/ Eric Singer, President and CEO</signatureName>
        <signatureDate>2024-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Immersion Corporation, By: /s/ Eric Singer, President, CEO and Chairman</signatureName>
        <signatureDate>2024-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ William C. Martin</signatureName>
        <signatureDate>2024-01-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
[{"type": "4", "sequence": "1", "filename": "wk-form4_1704319069.xml", "description": "FORM 4", "secsgml_size_bytes": 11355}]
X0508
4
2024-01-01
0
0000101984
UNIVERSAL ELECTRONICS INC
UEIC
0001443284
Singer Eric
C/O IMMERSION CORPORATION
2999 N.E. 191ST STREET, SUITE 610
AVENTURA
FL
33180
1
0
1
0
0001970265
TORO 18 HOLDINGS LLC
2999 N.E. 191ST STREET, SUITE 610
AVENTURA
FL
33180
0
0
1
0
0001058811
IMMERSION CORP
2999 N.E. 191ST STREET, SUITE 610
AVENTURA
FL
33180
0
0
1
0
0001205885
MARTIN WILLIAM C
C/O IMMERSION CORPORATION
2999 N.E. 191ST STREET, SUITE 610
AVENTURA
FL
33180
0
0
1
0
0
Common Stock
2024-01-01
4
A
0
153
0
A
153
D
Common Stock
1544647
I
By Group
Restricted Stock Units
2024-01-01
4
A
0
2500
0
A
Common Stock
2500
2500
D
This Form 4 is filed jointly by Eric Singer, Toro 18 Holdings LLC ("Toro 18"), Immersion Corporation ("Immersion") and William C. Martin (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 that collectively beneficially owns over 10% of the Issuer's outstanding shares of Common Stock. Mr. Singer is also a member of the board of directors of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.
Shares of the Issuer's Common Stock awarded on January 1, 2024 to Mr. Singer as pro rata director compensation, which shares are owned directly by Mr. Singer.
Shares of the Issuer's Common Stock owned directly by Mr. Singer.
Shares of the Issuer's Common Stock owned directly by Toro 18. Immersion, as the sole member of Toro 18, may be deemed to beneficially own the shares owned directly by Toro 18. Mr. Martin, as the Chief Strategy Officer of Toro 18, may be deemed to beneficially own the shares owned directly by Toro 18. Mr. Singer, as the President and Chief Executive Officer of Toro 18, may be deemed to beneficially own the securities owned directly by Toro 18.
Each restricted stock unit represents a contingent right to receive one share of the Issuer's Common Stock.
Restricted stock units awarded on January 1, 2024 to Mr. Singer as pro rata director compensation and generally vest and are paid quarterly over a period ending July 1, 2024, which restricted units are owned directly by Mr. Singer.
Restricted Stock Units owned directly by Mr. Singer.
/s/ Eric Singer
2024-01-03
Toro 18 Holdings LLC, By: /s/ Eric Singer, President and CEO
2024-01-03
Immersion Corporation, By: /s/ Eric Singer, President, CEO and Chairman
2024-01-03
/s/ William C. Martin
2024-01-03