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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2014-09-16</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001608638</issuerCik>
        <issuerName>Civitas Solutions, Inc.</issuerName>
        <issuerTradingSymbol>CIVI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001619095</rptOwnerCik>
            <rptOwnerName>NMH Investments, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O VESTAR CAPITAL PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>245 PARK AVENUE, 41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10167</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001331338</rptOwnerCik>
            <rptOwnerName>Vestar Capital Partners V L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O VESTAR CAPITAL PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>245 PARK AVENUE, 41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10167</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001619177</rptOwnerCik>
            <rptOwnerName>Vestar/NMH Investors, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O VESTAR CAPITAL PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>245 PARK AVENUE, 41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10167</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001416153</rptOwnerCik>
            <rptOwnerName>VESTAR ASSOCIATES V, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O VESTAR CAPITAL PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>245 PARK AVENUE, 41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10167</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001416152</rptOwnerCik>
            <rptOwnerName>VESTAR MANAGERS V LTD.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O VESTAR CAPITAL PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>245 PARK AVENUE, 41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10167</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001263034</rptOwnerCik>
            <rptOwnerName>OCONNELL DANIEL S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O VESTAR CAPITAL PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>245 PARK AVENUE, 41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10167</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25250000</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">These shares are held directly by NMH Investment, LLC (&quot;NMH Investment&quot;).  Vestar Capital Partners V, L.P. (the &quot;Fund&quot;) and Vestar/NMH Investors, LLC (&quot;Vestar/NMH Investors&quot;) are members of NMH Investment that have the power to appoint a majority of the members of the management committee of NMH Investment and as a result have the power to direct the management of NMH Investment's business, including the power to direct decisions of NMH Investment regarding the vote and disposition of securities held by NMH Investment. Vestar Associates V, L.P. (&quot;Vestar Associates V&quot;) is the general partner of the Fund and the managing member of Vestar/NMH Investors, and has voting and investment power over the securities held or controlled by the Fund and Vestar/NMH. Vestar Managers V, Ltd. (&quot;VMV&quot;) is the general partner of Vestar Associates V. Daniel S. O'Connell is the sole director of VMV and as a result he may be deemed to have beneficial ownership</footnote>
        <footnote id="F2">(continued from Footnote 1) of the shares held or controlled by the Fund and Vestar/NMH. Each of the Fund, Vestar/NMH Investors, Vestar Associates V, VMV and Mr. O'Connell disclaims beneficial ownership of any securities beneficially owned by NMH Investment except to the extent of their respective pecuniary interest therein.</footnote>
    </footnotes>

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

    <ownerSignature>
        <signatureName>NMH Investment, LLC, by /s/ Steven Della Rocca, by power of attorney</signatureName>
        <signatureDate>2014-09-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Vestar Capital Partners V, L.P. , by /s/ Steven Della Rocca, by power of attorney</signatureName>
        <signatureDate>2014-09-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Vestar/NMH Investors, LLC, by /s/ Steven Della Rocca, by power of attorney</signatureName>
        <signatureDate>2014-09-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Vestar Associates V, L.P. , by /s/ Steven Della Rocca, by power of attorney</signatureName>
        <signatureDate>2014-09-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Vestar Managers V Ltd. , by /s/ Steven Della Rocca, by power of attorney</signatureName>
        <signatureDate>2014-09-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Daniel S. O'Connell, by /s/ Steven Della Rocca, by power of attorney</signatureName>
        <signatureDate>2014-09-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
