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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-11-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000100493</issuerCik>
        <issuerName>TYSON FOODS, INC.</issuerName>
        <issuerTradingSymbol>TSN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001340962</rptOwnerCik>
            <rptOwnerName>White Noel W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2200 W DON TYSON PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SPRINGDALE</rptOwnerCity>
            <rptOwnerState>AR</rptOwnerState>
            <rptOwnerZipCode>72762</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Vice Chairman</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>304.7366</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>19567.084</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Employee Stock Purchase Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4270</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>60.74</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>133627.184</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F4"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5376.106</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>139003.29</value>
                    <footnoteId id="F3"/>
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            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F5"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2487</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>60.74</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>136516.29</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F6"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>18686.203</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>155202.493</value>
                    <footnoteId id="F7"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Performance Shares</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F8"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2020-11-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>34628.704</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F8"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F8"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>34628.704</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares of the Issuer's Class A Common Stock purchased for the Reporting Person's account under the Issuer's Employee Stock Purchase Plan since the last Statement of Changes in Beneficial Ownership was filed by the Reporting Person.  Such acquisitions are exempt from Section 16 concurrent reporting requirements pursuant to Rule 16b-3.</footnote>
        <footnote id="F2">On November 20, 2020, 9,230.758 shares of restricted Class A Common Stock vested. These shares were previously reported as beneficially owned by the Reporting Person. Pursuant to an election made by the Reporting Person, 4,270 shares were sold by the Reporting Person to the Issuer to satisfy tax withholding obligations.</footnote>
        <footnote id="F3">Includes 24,266.174 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable Stock Incentive Agreement (&quot;SIA&quot;) is achieved; 18,253.734 shares of Class A Common Stock which vest on November 18, 2022 if the performance metric described in the applicable SIA is achieved and 13,559.322 RSUs which vest in equal annual installments on each of the first, second and third anniversary dates of the grant and become fully vested on October 5, 2023.</footnote>
        <footnote id="F4">On November 17, 2017 the Reporting Person received a grant of 34,628.704 performance shares which vested or expired on November 20, 2020 subject to the achievement of performance criteria in the applicable SIA. The performance criteria were (a) a cumulative operating income target of $11,326 million for the 2018-2020 fiscal years and (b) a favorable comparison of the relative shareholder return of the Issuer's Class A Common Stock compared to a predetermined peer group of publicly traded companies over the 2018-2020 fiscal years. The performance shares could vest at a level of 50%-200% per performance criteria and were previously reported in the aggregate as derivative securities at the 200% level. On November 20, 2020, 5,376.106 shares vested and are reported herein as acquired non-derivatives securities and the remainder of the award expired.</footnote>
        <footnote id="F5">Pursuant to an election made by the Reporting Person, these shares were sold by the Reporting Person to the Issuer on November 20, 2020, to satisfy tax withholding obligations related to the vesting described in footnote 4.</footnote>
        <footnote id="F6">Award of restricted stock units (&quot;RSUs&quot;) which vest in equal annual increments on each of the first and second anniversary dates of the grant and become fully vested after two years. Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.</footnote>
        <footnote id="F7">Includes 24,266.174 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable SIA is achieved; 18,253.734 shares of Class A Common Stock which vest on November 18, 2022 if the performance metric described in the applicable SIA is achieved; 18,686.203 RSUs which vest in equal annual installments on each of the first and second anniversary dates of the grant and become fully vested on November 20, 2022; and 13,559.322 RSUs which vest in equal annual installments on each of the first, second and third anniversary dates of the grant and become fully vested on October 5, 2023.</footnote>
        <footnote id="F8">A portion of these performance shares vested as described in footnote 4. The remainder of the award expired.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ R. Read Hudson by Power of Attorney for Noel W. White</signatureName>
        <signatureDate>2020-11-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0306
4
2020-11-12
0
0000100493
TYSON FOODS, INC.
TSN
0001340962
White Noel W
2200 W DON TYSON PARKWAY
SPRINGDALE
AR
72762
1
1
0
0
Executive Vice Chairman
Class A Common Stock
2020-11-12
4
J
0
304.7366
0
A
19567.084
I
Employee Stock Purchase Plan
Class A Common Stock
2020-11-20
4
F
0
4270
60.74
D
133627.184
D
Class A Common Stock
2020-11-20
4
M
0
5376.106
0
A
139003.29
D
Class A Common Stock
2020-11-20
4
F
0
2487
60.74
D
136516.29
D
Class A Common Stock
2020-11-20
4
A
0
18686.203
0
A
155202.493
D
Performance Shares
2020-11-20
4
M
0
34628.704
0
D
Class A Common Stock
34628.704
0
D
Represents shares of the Issuer's Class A Common Stock purchased for the Reporting Person's account under the Issuer's Employee Stock Purchase Plan since the last Statement of Changes in Beneficial Ownership was filed by the Reporting Person.  Such acquisitions are exempt from Section 16 concurrent reporting requirements pursuant to Rule 16b-3.
On November 20, 2020, 9,230.758 shares of restricted Class A Common Stock vested. These shares were previously reported as beneficially owned by the Reporting Person. Pursuant to an election made by the Reporting Person, 4,270 shares were sold by the Reporting Person to the Issuer to satisfy tax withholding obligations.
Includes 24,266.174 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable Stock Incentive Agreement ("SIA") is achieved; 18,253.734 shares of Class A Common Stock which vest on November 18, 2022 if the performance metric described in the applicable SIA is achieved and 13,559.322 RSUs which vest in equal annual installments on each of the first, second and third anniversary dates of the grant and become fully vested on October 5, 2023.
On November 17, 2017 the Reporting Person received a grant of 34,628.704 performance shares which vested or expired on November 20, 2020 subject to the achievement of performance criteria in the applicable SIA. The performance criteria were (a) a cumulative operating income target of $11,326 million for the 2018-2020 fiscal years and (b) a favorable comparison of the relative shareholder return of the Issuer's Class A Common Stock compared to a predetermined peer group of publicly traded companies over the 2018-2020 fiscal years. The performance shares could vest at a level of 50%-200% per performance criteria and were previously reported in the aggregate as derivative securities at the 200% level. On November 20, 2020, 5,376.106 shares vested and are reported herein as acquired non-derivatives securities and the remainder of the award expired.
Pursuant to an election made by the Reporting Person, these shares were sold by the Reporting Person to the Issuer on November 20, 2020, to satisfy tax withholding obligations related to the vesting described in footnote 4.
Award of restricted stock units ("RSUs") which vest in equal annual increments on each of the first and second anniversary dates of the grant and become fully vested after two years. Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.
Includes 24,266.174 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable SIA is achieved; 18,253.734 shares of Class A Common Stock which vest on November 18, 2022 if the performance metric described in the applicable SIA is achieved; 18,686.203 RSUs which vest in equal annual installments on each of the first and second anniversary dates of the grant and become fully vested on November 20, 2022; and 13,559.322 RSUs which vest in equal annual installments on each of the first, second and third anniversary dates of the grant and become fully vested on October 5, 2023.
A portion of these performance shares vested as described in footnote 4. The remainder of the award expired.
/s/ R. Read Hudson by Power of Attorney for Noel W. White
2020-11-24