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

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2026-04-28</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0002002660</issuerCik>
        <issuerName>Pershing Square USA, Ltd.</issuerName>
        <issuerTradingSymbol>PSUS</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002027456</rptOwnerCik>
            <rptOwnerName>Pershing Square Management, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>787 ELEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>9TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>true</isOther>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002129159</rptOwnerCik>
            <rptOwnerName>Pershing Square Partner Group LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>787 ELEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>9TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>true</isOther>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002026053</rptOwnerCik>
            <rptOwnerName>PERSHING SQUARE INC.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>787 ELEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>9TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>true</isOther>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002129160</rptOwnerCik>
            <rptOwnerName>Pershing Square PSUS Holdings, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>787 ELEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>9TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>true</isOther>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares of Beneficial Interest</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>342320</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">In addition to Pershing Square Management, LLC, a Delaware limited liability company (&quot;ManagementCo&quot;), this Form 3 is being filed jointly by Pershing Square Inc., a Nevada corporation (&quot;PS Inc.&quot;), Pershing Square Partner Group, LLC (&quot;PSPG&quot;), a Delaware limited liability company, and Pershing Square PSUS Holdings, LLC, a Nevada limited liability company (&quot;PSUS Holdings&quot;, and together with ManagementCo, PS Inc. and PSPG, the &quot;Reporting Persons&quot;), each of whom has the same business address as ManagementCo and may be deemed to beneficially own the securities reported on this Form 3 (the &quot;Subject Securities&quot;).</footnote>
        <footnote id="F2">The Subject Securities are held by PSUS Holdings. ManagementCo holds majority voting power over PS Inc.'s shares (including in its capacity as the managing member of PSPG). PS Inc. holds 100% of the interests in PSUS Holdings. ManagementCo, PSPG and PS Inc. may each be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934, as amended (the &quot;Exchange Act&quot;).</footnote>
        <footnote id="F3">(Continued from Footnote 2) ManagementCo is governed by its members, consisting of William A. Ackman, Ryan Israel, Ben Hakim, Michael Gonnella, Anthony Massaro and Halit Coussin (collectively, the &quot;ManagementCo Members&quot;). Mr. Ackman owns 24.9% of the voting interests of ManagementCo, with Mr. Israel, Mr. Hakim, Mr. Gonnella, Mr. Massaro and Ms. Coussin each owning the remainder of the voting interests equally (approximately 15% each), and the approval of a majority of the voting interests is generally required to approve any action of ManagementCo. Each of PS Inc., PSPG, ManagementCo and the ManagementCo Members disclaims beneficial ownership of any Subject Securities, except to the extent of any pecuniary interest therein.</footnote>
    </footnotes>

    <remarks>Nicholas Botta, a member of the board of trustees of the Issuer, is acting in such capacity as a representative of the Reporting Persons. As a result, each of the Reporting Persons is a trustee by deputization for purposes of Section 16 of the Exchange Act.

Affiliate of Investment Adviser; Trustee</remarks>

    <ownerSignature>
        <signatureName>PERSHING SQUARE MANAGEMENT, LLC, By: /s/ William A. Ackman, Member and Chief Executive Officer</signatureName>
        <signatureDate>2026-04-28</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>PERSHING SQUARE PARTNER GROUP, LLC, By: PERSHING SQUARE MANAGEMENT, LLC, its Managing Member, By: /s/ William A. Ackman, Member and Chief Executive Officer</signatureName>
        <signatureDate>2026-04-28</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>PERSHING SQUARE INC., By: /s/ William A. Ackman, Chief Executive Officer and Chairman of the Board</signatureName>
        <signatureDate>2026-04-28</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>PERSHING SQUARE PSUS HOLDINGS, LLC, By: /s/ William A. Ackman, Authorized Signatory</signatureName>
        <signatureDate>2026-04-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
