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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2014-07-09</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001135657</issuerCik>
        <issuerName>Eco-Stim Energy Solutions, Inc.</issuerName>
        <issuerTradingSymbol>ESES</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001290839</rptOwnerCik>
            <rptOwnerName>Chan Lap Wai</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ALBRIGHT CAPITAL MANAGEMENT LLC,</rptOwnerStreet1>
            <rptOwnerStreet2>1101 NEW YORK AVENUE, NW</rptOwnerStreet2>
            <rptOwnerCity>WASHINGTON</rptOwnerCity>
            <rptOwnerState>DC</rptOwnerState>
            <rptOwnerZipCode>20005</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1333333</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Convertible Notes</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>6.00</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2014-05-28</value>
            </exerciseDate>
            <expirationDate>
                <value>2018-05-28</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1977315</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person became a director of the Issuer on July 9, 2014. In connection with a merger (the &quot;Merger&quot;) in 2013, the Issuer amended and restated its articles of incorporation and changed its name to &quot;Eco-Stim Energy Solutions, Inc.&quot; and commenced trading under the symbol &quot;ESES&quot; on the Over-the-Counter Bulletin Board. Before the Merger, the Issuer was considered a &quot;shell company&quot; and had filed periodic reports under the Exchange Act. It is unclear whether the Issuer's securities were registered under Section 12 or whether the Issuer was a voluntary filer, but the Reporting Person understands that the Issuer has concluded that its executive officers and directors should comply with the reporting requirements of Section 16(a) of the Exchange Act. Accordingly, the Reporting Person is making this filing, which may be deemed to be a late reporting of the transactions listed herein.</footnote>
        <footnote id="F2">1,333,333 shares of common stock were purchased by ACM Emerging Markets Master Fund I, L.P. (the &quot;Fund&quot;) at a price of $6.00 per share on July 14, 2014 pursuant to the exercise of an option acquired by the Fund on May 28, 2014.</footnote>
        <footnote id="F3">The Reporting Person is a senior director of Albright Capital Management LLC, the general partner (the &quot;General Partner&quot;) of the Fund, and accordingly may have an indirect pecuniary interest in the shares of the Issuer beneficially owned by the Fund. Such indirect pecuniary interest cannot be calculated through a proportionate allocation of shares in the Issuer. Therefore, the entire amount of the Fund's interest is being reported. The Reporting Person disclaims beneficial ownership of the shares of the Issuer held by the Fund, except to the extent of his pecuniary interest therein.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Lap Wai Chan</signatureName>
        <signatureDate>2014-10-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
