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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-12-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001849253</issuerCik>
        <issuerName>RYAN SPECIALTY HOLDINGS, INC.</issuerName>
        <issuerTradingSymbol>RYAN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001870059</rptOwnerCik>
            <rptOwnerName>TURNER TIMOTHY WILLIAM</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>155 NORTH WACKER DRIVE, SUITE 4000</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60606</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-12-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>129964</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>142123</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-12-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>129570</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>53.61</value>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12553</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Class C Common Incentive Units [Right to Buy]</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>23.14</value>
                <footnoteId id="F4"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2025-12-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>222000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F5"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>129964</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>165942</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Class C Common Incentive Units were exchanged, pursuant to the terms of the operating agreement of New Ryan Specialty, LLC (the &quot;LLC&quot;), for a number of Common Units determined by reference to (1) the Class C Common Incentive Units' Return Threshold and (2) adjustments for certain prior tax distributions made with respect to such Class C Common Incentive Units. Such Common Units were then immediately redeemed on a one-for-one basis for shares of Class A Common Stock.</footnote>
        <footnote id="F2">The shares were sold by the Reporting Person to satisfy a separation of assets obligation as required by the Reporting Person's divorce settlement.</footnote>
        <footnote id="F3">The shares of Class A Common Stock were sold pursuant to a block trade transaction at a discount from the market price.</footnote>
        <footnote id="F4">The Class C Common Incentive Units' Return Threshold is used to determine the value of such units and, by extension, the number of shares of Class A Common Stock into which such units may be converted. The current Return Threshold of such units is $23.14. The units had a Return Threshold of $23.50 when issued, which, pursuant to the terms of the operating agreement of the LLC, is reduced on a one-for-one basis for each distribution from the LLC with respect to its Common Units. The LLC has made seven distributions for a total amount of $0.36 per unit with respect to its Common Units since the Reporting Person's Class C Common Incentive Units were issued.</footnote>
        <footnote id="F5">Represents Class C Common Incentive Units of Ryan Specialty Group, LLC. Such grant was approved by the Board of the Issuer for purposes of Rule 16(b)(3). The Class C Common Incentive Units may be exchangeable into a number of Common Units as described in the prior footnote, which will then be immediately redeemed on a one-for-one basis for Class A Common Stock of the Issuer based on the value of Common Units and the fair market value of the Class A Common Stock at the time of the applicable exchange.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Mark S. Katz, as Attorney-in-Fact</signatureName>
        <signatureDate>2025-12-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
