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

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2018-08-21</finalEffectivenessDispDate>
        <accessionNumber>0001144204-18-045468</accessionNumber>
        <submissionType>POS AM</submissionType>
        <filer>
            <cik>0001094348</cik>
            <entityName>Mattersight Corp</entityName>
            <fileNumber>333-193146</fileNumber>
        </filer>
    </effectiveData>
</edgarSubmission>
