<SEC-DOCUMENT>0001104659-25-016250.txt : 20250221
<SEC-HEADER>0001104659-25-016250.hdr.sgml : 20250221
<ACCEPTANCE-DATETIME>20250221203643
ACCESSION NUMBER:		0001104659-25-016250
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250220
FILED AS OF DATE:		20250221
DATE AS OF CHANGE:		20250221

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lyon Mckinsey Margaret
		CENTRAL INDEX KEY:			0001902352
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39918
		FILM NUMBER:		25653905

	MAIL ADDRESS:	
		STREET 1:		405 S. 8TH STREET
		STREET 2:		SUITE 201
		CITY:			BOISE
		STATE:			ID
		ZIP:			83702

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PERPETUA RESOURCES CORP.
		CENTRAL INDEX KEY:			0001526243
		STANDARD INDUSTRIAL CLASSIFICATION:	GOLD & SILVER ORES [1040]
		ORGANIZATION NAME:           	01 Energy & Transportation
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			A1
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		405 S. 8TH STREET
		CITY:			BOISE
		STATE:			ID
		ZIP:			83702
		BUSINESS PHONE:		208-901-3060

	MAIL ADDRESS:	
		STREET 1:		405 S. 8TH STREET
		CITY:			BOISE
		STATE:			ID
		ZIP:			83702

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MIDAS GOLD CORP.
		DATE OF NAME CHANGE:	20110720
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>tm257329-1_4seq1.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-02-20</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001526243</issuerCik>
        <issuerName>PERPETUA RESOURCES CORP.</issuerName>
        <issuerTradingSymbol>PPTA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001902352</rptOwnerCik>
            <rptOwnerName>Lyon Mckinsey Margaret</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>405 S. 8TH STREET, STE 201</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOISE</rptOwnerCity>
            <rptOwnerState>ID</rptOwnerState>
            <rptOwnerZipCode>83702</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>(See remarks (4))</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2025-02-20</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10209</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.24</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>37580</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Share Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2025-02-21</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>15847</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15847</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>65042</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the settlement of Restricted Share Units (&quot;RSU&quot;), which vested on February 10, 2025 and February 16, 2025, and were settled in Common Shares of the Issuer following the end of the Issuer's blackout period on February 20, 2025.</footnote>
        <footnote id="F2">The sale price included on this Form 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.14 to $9.29, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Shares sold at each separate price within the ranges set forth in this footnote (2).</footnote>
        <footnote id="F3">An RSU entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs will vest ratably on each of the first three anniversaries of the grant date, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.</footnote>
    </footnotes>

    <remarks>(4) VP, External Affairs at Perpetua Resources Idaho, Inc., a wholly owned subsidiary of Perpetua Resources Corp.</remarks>

    <ownerSignature>
        <signatureName>/s/ Tanya Nelson, as attorney-in-fact for Mckinsey Lyon</signatureName>
        <signatureDate>2025-02-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
