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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-06-24</periodOfReport>

    <issuer>
        <issuerCik>0001748824</issuerCik>
        <issuerName>BrightSphere Investment Group Inc.</issuerName>
        <issuerTradingSymbol>BSIG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001394923</rptOwnerCik>
            <rptOwnerName>Paulson John</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1133 AVENUE OF THE AMERICAS</rptOwnerStreet1>
            <rptOwnerStreet2>33RD FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10036</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2020-06-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>647263</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.79</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20647815</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Paulson &amp; Co. Inc.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2020-06-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>647263</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.79</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20000552</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Paulson &amp; Co. Inc.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">John Paulson, the controlling person of Paulson &amp; Co. Inc. (&quot;Paulson &amp; Co.&quot;), serves on the board of directors of the Issuer. Paulson &amp; Co. is an investment advisor registered under the Investment Advisors Act of 1940. Paulson &amp; Co. is the investment manager of investment funds (the &quot;Funds&quot;). John Paulson may be deemed an indirect beneficial owner of the securities, which are directly owned by the Funds Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the &quot;Act&quot;), the reporting person disclaims beneficial ownership of any securities reported herein, except to the extent that the reporting person has a pecuniary interest therein. This report shall not be deemed an admission that such reporting person is the beneficial owner of any securities not directly owned by such reporting person.</footnote>
        <footnote id="F2">Each of John Paulson and Paulson &amp; Co. may be deemed to indirectly beneficially own the securities directly owned by Paulson &amp; Co.. Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the &quot;Act&quot;), the filing of this Form 4 shall not be deemed an admission by any person reporting on this Form 4 that such person, for purposes of Section 16 of the Act or otherwise, is the beneficial owner of any equity securities covered by this Form 4.</footnote>
        <footnote id="F3">Represent rebalancing transactions between the Funds.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>JOHN PAULSON
By: /s/ John Paulson</signatureName>
        <signatureDate>2020-06-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
