<SEC-DOCUMENT>0001104659-19-020009.txt : 20190404
<SEC-HEADER>0001104659-19-020009.hdr.sgml : 20190404
<ACCEPTANCE-DATETIME>20190404193107
ACCESSION NUMBER:		0001104659-19-020009
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190402
FILED AS OF DATE:		20190404
DATE AS OF CHANGE:		20190404

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kanen David
		CENTRAL INDEX KEY:			0001681743

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33264
		FILM NUMBER:		19733268

	MAIL ADDRESS:	
		STREET 1:		6429 NW 65TH WAY
		CITY:			PARKLAND
		STATE:			FL
		ZIP:			33067

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kanen Wealth Management LLC
		CENTRAL INDEX KEY:			0001681614
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33264
		FILM NUMBER:		19733269

	BUSINESS ADDRESS:	
		STREET 1:		10141 SWEET BAY COURT
		CITY:			PARKLAND
		STATE:			FL
		ZIP:			33076
		BUSINESS PHONE:		631-863-3100

	MAIL ADDRESS:	
		STREET 1:		10141 SWEET BAY COURT
		CITY:			PARKLAND
		STATE:			FL
		ZIP:			33076

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Philotimo Fund, LP
		CENTRAL INDEX KEY:			0001688522
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33264
		FILM NUMBER:		19733270

	BUSINESS ADDRESS:	
		STREET 1:		5850 CORAL RIDGE DRIVE, SUITE 309
		CITY:			CORAL SPRINGS
		STATE:			FL
		ZIP:			33076
		BUSINESS PHONE:		631-863-3100

	MAIL ADDRESS:	
		STREET 1:		5850 CORAL RIDGE DRIVE, SUITE 309
		CITY:			CORAL SPRINGS
		STATE:			FL
		ZIP:			33076

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			U.S. Auto Parts Network, Inc.
		CENTRAL INDEX KEY:			0001378950
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-AUTO & HOME SUPPLY STORES [5531]
		IRS NUMBER:				680623433
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1229

	BUSINESS ADDRESS:	
		STREET 1:		16941 KEEGAN AVE
		CITY:			CARSON
		STATE:			CA
		ZIP:			90746
		BUSINESS PHONE:		(310) 735-0085

	MAIL ADDRESS:	
		STREET 1:		16941 KEEGAN AVE
		CITY:			CARSON
		STATE:			CA
		ZIP:			90746
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-04-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001378950</issuerCik>
        <issuerName>U.S. Auto Parts Network, Inc.</issuerName>
        <issuerTradingSymbol>PRTS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001681743</rptOwnerCik>
            <rptOwnerName>Kanen David</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5850 CORAL RIDGE DR.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 309</rptOwnerStreet2>
            <rptOwnerCity>CORAL SPRINGS</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33076</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001681614</rptOwnerCik>
            <rptOwnerName>Kanen Wealth Management LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5850 CORAL RIDGE DR.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 309</rptOwnerStreet2>
            <rptOwnerCity>CORAL SPRINGS</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33076</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001688522</rptOwnerCik>
            <rptOwnerName>Philotimo Fund, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5850 CORAL RIDGE DR.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 309</rptOwnerStreet2>
            <rptOwnerCity>CORAL SPRINGS</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33076</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>173514</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1605928</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>The Philotimo Fund LP</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-04-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>215822</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F4"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2994360</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Kanen Wealth Management LLC</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-04-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>18475</value>
                    <footnoteId id="F5"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2975855</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Kanen Wealth Management LLC</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-04-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>805</value>
                    <footnoteId id="F6"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2975080</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Kanen Wealth Management LLC</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Form 4 is filed jointly by David Kanen, Kanen Wealth Management, LLC (&quot;KWM&quot;) and the Philotimo Fund, LP (collectively, the &quot;Reporting Persons&quot;). Each of the Reporting Persons may be deemed to be a member of a group that may be deemed to collectively beneficially own more than 10% of the Issuer's outstanding shares of Common Stock. The filing of this Form 4 shall not be deemed an admission that the Reporting Persons are, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, the beneficial owners of any securities of the Issuer he or it does not directly own.</footnote>
        <footnote id="F2">Mr. Kanen beneficially owns, pursuant to the beneficial ownership rules of Section 13(d) of the Securities Exchange Act of 1934, as amended (the &quot;Exchange Act&quot;), 4,754,522 shares of Common Stock, which represent approximately 13% of the Issuer's outstanding shares of Common Stock. Pursuant to such beneficial ownership rules, Mr. Kanen, as the managing member of KWM, may be deemed to beneficially own the 3,148,594 shares of Common Stock held in customer accounts managed by KWM (including the 173,514 shares held in Mr. Kanen's account) and the 1,605,928 shares of Common Stock held by The Philotimo Fund LLC, of which KWM is the general partner. Mr. Kanen expressly disclaims such beneficial ownership except to the extent of his pecuniary interest therein. Mr. Kanen does not have a pecuniary interest under Section 16 of the Exchange Act in the shares of Common Stock held in customer accounts managed by KWM other than the 173,514 shares held in Mr. Kanen's account.</footnote>
        <footnote id="F3">KWM does not have a pecuniary interest in the shares of Common Stock held in customer accounts managed by KWM. The number reflected above excludes 173,514 shares held in Mr. Kanen's account as described in footnote 2 above.</footnote>
        <footnote id="F4">On April 2, 2019, KWM ceased managing accounts holding 215,822 shares of the Issuer. Neither KWM, The Philotimo Fund, LP nor Mr. Kanen has any pecuniary interest in these shares.</footnote>
        <footnote id="F5">On April 3, 2019, KWM ceased managing accounts already holding 18,475 shares of the Issuer. Neither KWM, The Philotimo Fund, LP nor Mr. Kanen has any pecuniary interest in these shares.</footnote>
        <footnote id="F6">On April4, 2019, KWM ceased managing accounts already holding 805 shares of the Issuer. Neither KWM, The Philotimo Fund, LP nor Mr. Kanen has any pecuniary interest in these shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Kanen Wealth Management LLC By: David L. Kanen</signatureName>
        <signatureDate>2019-04-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ David L. Kanen</signatureName>
        <signatureDate>2019-04-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ The Philotimo Fund By: David L. Kanen</signatureName>
        <signatureDate>2019-04-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
