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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-10-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001739942</issuerCik>
        <issuerName>SolarWinds Corp</issuerName>
        <issuerTradingSymbol>SWI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000729057</rptOwnerCik>
            <rptOwnerName>PRUDENTIAL INSURANCE CO OF AMERICA</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>751 BROAD STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEWARK</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07102</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001755924</rptOwnerCik>
            <rptOwnerName>PRUDENTIAL LEGACY INSURANCE CO OF NEW JERSEY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>751 BROAD STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEWARK</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07102</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2018-10-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1068472</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1665286</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-10-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>15988</value>
                    <footnoteId id="F5"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                    <footnoteId id="F1"/>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1068472</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Immediately prior to the completion of the Issuers initial public offering and following the conversion of the Issuers Class A Common Stock into Class B Common Stock, each share of Class B Common Stock was reclassified into one share of Common Stock.</footnote>
        <footnote id="F2">Immediately prior to the completion of the Issuers initial public offering, each outstanding share of Class A Common Stock automatically converted into a number of shares of Class B Common Stock equal to the result of the liquidation value of such share of Class A Common Stock divided by $19.00. The liquidation value for each share of Class A Common Stock was equal to $1,000 plus accrued and unpaid dividends on such share of Class A Common Stock through October 18, 2018. In addition, the shares of the Issuers Class A Common Stock were convertible, at the option of the holder, into shares of Class B Common Stock for a specified period of time ending on November 7, 2018.</footnote>
        <footnote id="F3">Consists of 534,236 shares held directly by The Prudential Insurance Company of America (PICA) and 534,236 shares held directly by Prudential Legacy Insurance Company of New Jersey (PLIC).</footnote>
        <footnote id="F4">Consists of 832,643 shares held directly by PICA and 832,643 shares held directly by PLIC.</footnote>
        <footnote id="F5">Consists of 7,994 shares held directly by PICA and 7,994 shares held directly by PLIC.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>The Prudential Insurance Company of America by /s/Ariele Cohen, Assistant Secretary</signatureName>
        <signatureDate>2018-10-24</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Prudential Legacy Insurance Company of New Jersey by /s/Ariele Cohen, Assistant Secretary</signatureName>
        <signatureDate>2018-10-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0306
4
2018-10-23
0
0001739942
SolarWinds Corp
SWI
0000729057
PRUDENTIAL INSURANCE CO OF AMERICA
751 BROAD STREET
NEWARK
NJ
07102
0
0
1
0
0001755924
PRUDENTIAL LEGACY INSURANCE CO OF NEW JERSEY
751 BROAD STREET
NEWARK
NJ
07102
0
0
1
0
Common Stock
2018-10-23
4
C
0
1068472
A
1665286
D
Class A Common Stock
2018-10-23
4
C
0
15988
D
Common Stock
1068472
0
D
Immediately prior to the completion of the Issuers initial public offering and following the conversion of the Issuers Class A Common Stock into Class B Common Stock, each share of Class B Common Stock was reclassified into one share of Common Stock.
Immediately prior to the completion of the Issuers initial public offering, each outstanding share of Class A Common Stock automatically converted into a number of shares of Class B Common Stock equal to the result of the liquidation value of such share of Class A Common Stock divided by $19.00. The liquidation value for each share of Class A Common Stock was equal to $1,000 plus accrued and unpaid dividends on such share of Class A Common Stock through October 18, 2018. In addition, the shares of the Issuers Class A Common Stock were convertible, at the option of the holder, into shares of Class B Common Stock for a specified period of time ending on November 7, 2018.
Consists of 534,236 shares held directly by The Prudential Insurance Company of America (PICA) and 534,236 shares held directly by Prudential Legacy Insurance Company of New Jersey (PLIC).
Consists of 832,643 shares held directly by PICA and 832,643 shares held directly by PLIC.
Consists of 7,994 shares held directly by PICA and 7,994 shares held directly by PLIC.
The Prudential Insurance Company of America by /s/Ariele Cohen, Assistant Secretary
2018-10-24
Prudential Legacy Insurance Company of New Jersey by /s/Ariele Cohen, Assistant Secretary
2018-10-24