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

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-06-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001941536</issuerCik>
        <issuerName>Bridger Aerospace Group Holdings, Inc.</issuerName>
        <issuerTradingSymbol>BAER</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001198067</rptOwnerCik>
            <rptOwnerName>SAVAGE ROBERT F JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>C/O BRIDGER AEROSPACE GROUP HLDGS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>90 AVIATION LANE</rptOwnerStreet2>
            <rptOwnerCity>BELGRADE</rptOwnerCity>
            <rptOwnerState>MT</rptOwnerState>
            <rptOwnerZipCode>59714</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-06-04</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>45156</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>520557</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50505</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Madeleine Savage 2021 Trust</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50505</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F4"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Sophie Savage 2021 Trust</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>527800</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F6"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By 656 Investors LLC</value>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Each Restricted Stock Unit (&quot;RSU&quot;) represents a contingent right to receive one share of the Issuer's Common Stock. These RSUs shall vest on the 12-month anniversary of June 4, 2026, subject to the Reporting Person's continued service through such date.</footnote>
        <footnote id="F2">Includes 42,498 shares which vest generally as follows: (i) 50% of the shares vest on the first date during the Earnout Period (defined below) on which the VWAP of the shares exceeds $11.50 for a period of at least 20 out of 30 consecutive trading days, and (ii) 50% of the shares vest on the first date during the Earnout Period on which the VWAP exceeds $13.00 for a period of at least 20 out of 30 consecutive trading days (shares vesting on such schedule, the &quot;Earnout Shares&quot;). The &quot;Earnout Period&quot; is the time period beginning on the date immediately following the January 24, 2023 closing of the Issuer's initial business combination (the &quot;Closing Date&quot;) and ending on and including the five year anniversary of the Closing Date. Any Earnout Shares not vested by the end of the Earnout Period shall be forfeited back to the Issuer for no consideration.</footnote>
        <footnote id="F3">Mr. Savage holds shared authority to direct the voting and disposition of shares held by Madeleine Savage 2021 Trust. The Reporting Person disclaims beneficial ownership of the shares of the Issuer's Common Stock held by Madeleine Savage 2021 Trust for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934, as amended (the &quot;Act&quot;), except to the extent of the Reporting Person's pecuniary interest therein, if any, and the filing of this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Act or for any other purpose.</footnote>
        <footnote id="F4">Mr. Savage holds shared authority to direct the voting and disposition of shares held by Sophie Savage 2021 Trust. The Reporting Person disclaims beneficial ownership of the shares of the Issuer's Common Stock held by Sophie Savage 2021 Trust for purposes of Rule 16a-1(a) under the Act, except to the extent of the Reporting Person's pecuniary interest therein, if any, and the filing of this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Act or for any other purpose.</footnote>
        <footnote id="F5">Includes 212,490 Earnout Shares.</footnote>
        <footnote id="F6">Mr. Savage holds shared authority to direct the voting and disposition of shares held by 656 Investors LLC. The Reporting Person disclaims beneficial ownership of the shares of the Issuer's Common Stock held by 656 Investors LLC for purposes of Rule 16a-1(a) under the Act, except to the extent of the Reporting Person's pecuniary interest therein, if any, and the filing of this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Act or for any other purpose.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Robert F. Savage, Jr.</signatureName>
        <signatureDate>2026-06-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
