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

    <reportingOwner>
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            <rptOwnerCik>0001723124</rptOwnerCik>
            <rptOwnerName>Spradley Jay Scott</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2200 W DON TYSON PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SPRINGDALE</rptOwnerCity>
            <rptOwnerState>AR</rptOwnerState>
            <rptOwnerZipCode>72762</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
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            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP &amp; Chief Technology Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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                    <value>Employee Stock Purchase Plan</value>
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        <nonDerivativeTransaction>
            <securityTitle>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
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            <transactionDate>
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                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
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                <transactionPricePerShare>
                    <footnoteId id="F10"/>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
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            <expirationDate>
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            <underlyingSecurity>
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                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
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                    <value>14447.656</value>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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            </ownershipNature>
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        <derivativeTransaction>
            <securityTitle>
                <value>Non-Qualified Stock Options (Right to Buy)</value>
            </securityTitle>
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                <value>89.98</value>
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            <transactionDate>
                <value>2019-11-18</value>
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                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F11"/>
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                <transactionShares>
                    <value>19392</value>
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                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <value>2020-11-18</value>
            </exerciseDate>
            <expirationDate>
                <value>2029-11-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>19392.0</value>
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                <sharesOwnedFollowingTransaction>
                    <value>19392</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares of the Issuer's Class A Common Stock received by the Reporting Person pursuant to the Issuer's dividend reinvestment 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 16a-11.</footnote>
        <footnote id="F2">Includes 3,960.93 shares of Class A Common Stock which vest on November 13, 2020 if the performance metric described in the applicable Stock Incentive Agreement (&quot;SIA&quot;) is achieved and 5,537.637 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable SIA is achieved.</footnote>
        <footnote id="F3">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="F4">The Reporting Person transferred shares from his Employee Stock Purchase Plan account into his personal stock account thereby changing the ownership of the Class A Common Stock from indirect to direct.</footnote>
        <footnote id="F5">Represents shares of the Issuer's Class A Common Stock received by the Reporting Person pursuant to the Issuer's dividend reinvestment plan since June 15, 2019.  Such acquisitions are exempt from Section 16 concurrent reporting requirements pursuant to Rule 16a-11.</footnote>
        <footnote id="F6">Includes 3,996.473 shares of Class A Common Stock which vest on November 13, 2020 if the performance metric described in the applicable SIA is achieved and 5,587.33 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable SIA is achieved.</footnote>
        <footnote id="F7">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 May 16, 2019.  Such acquisitions are exempt from Section 16 concurrent reporting requirements pursuant to Rule 16b-3.</footnote>
        <footnote id="F8">Award of Class A Common Stock which vests on November 18, 2022 if the performance metric described in the applicable Stock Incentive Award Agreement (the &quot;SIA&quot;) is achieved. The performance metric is the achievement of a three year (fiscal 2020-2022) cumulative adjusted operating income target as set forth in the SIA. If the performance metric is not achieved, the award expires.</footnote>
        <footnote id="F9">Includes 3,996.473 shares of Class A Common Stock which vest on November 13, 2020 if the performance metric described in the applicable SIA is achieved; 5,587.33 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable SIA is achieved and 3,611.914 shares of Class A Common Stock which vest on November 18, 2022 if the performance metric described in the applicable SIA is achieved.</footnote>
        <footnote id="F10">Award of performance Class A Common Stock which vests on November 18, 2022 if the performance metrics described in the applicable SIA are achieved. The performance metrics set forth in the SIA are (1) achievement of a three year (fiscal 2020-2022) cumulative operating income target and (2) a favorable comparison of the relative total shareholder return of the Issuer's Class A Common Stock compared to a predetermined peer group of publicly traded companies over a three year (fiscal 2020-2022) period. Subject to the achievement of the performance metrics, the performance shares could vest at a level of 50 to 200 percent and are reported as derivative securities at the 200 percent level. If neither of the performance metrics are achieved, the award expires.</footnote>
        <footnote id="F11">The stock options vest at 33 1/3 percent on each of the first, second, and third anniversary dates of the grant.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ J. Scott Spradley</signatureName>
        <signatureDate>2019-11-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0306
4
2019-03-21
0
0000100493
TYSON FOODS, INC.
TSN
0001723124
Spradley Jay Scott
2200 W DON TYSON PARKWAY
SPRINGDALE
AR
72762
0
1
0
0
EVP & Chief Technology Officer
Class A Common Stock
2019-03-21
4
J
0
116.806
0
A
9498.567
D
Class A Common Stock
2019-05-02
4
J
0
538.5384
0
A
1408.9707
I
Employee Stock Purchase Plan
Class A Common Stock
2019-05-08
4
J
0
355
0
D
1053.9707
I
Employee Stock Purchase Plan
Class A Common Stock
2019-05-08
4
J
0
355
0
A
9853.567
D
Class A Common Stock
2019-09-16
4
J
0
85.236
0
A
9938.803
D
Class A Common Stock
2019-11-14
4
J
0
464.9797
0
A
1518.9504
I
Employee Stock Purchase Plan
Class A Common Stock
2019-11-18
4
A
0
3611.914
0
A
13550.717
D
Performance Shares
2019-11-18
4
A
0
14447.656
A
Class A Common Stock
14447.656
14447.656
D
Non-Qualified Stock Options (Right to Buy)
89.98
2019-11-18
4
A
0
19392
0
A
2020-11-18
2029-11-18
Class A Common Stock
19392.0
19392
D
Represents shares of the Issuer's Class A Common Stock received by the Reporting Person pursuant to the Issuer's dividend reinvestment 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 16a-11.
Includes 3,960.93 shares of Class A Common Stock which vest on November 13, 2020 if the performance metric described in the applicable Stock Incentive Agreement ("SIA") is achieved and 5,537.637 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable SIA is achieved.
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.
The Reporting Person transferred shares from his Employee Stock Purchase Plan account into his personal stock account thereby changing the ownership of the Class A Common Stock from indirect to direct.
Represents shares of the Issuer's Class A Common Stock received by the Reporting Person pursuant to the Issuer's dividend reinvestment plan since June 15, 2019.  Such acquisitions are exempt from Section 16 concurrent reporting requirements pursuant to Rule 16a-11.
Includes 3,996.473 shares of Class A Common Stock which vest on November 13, 2020 if the performance metric described in the applicable SIA is achieved and 5,587.33 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable SIA is achieved.
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 May 16, 2019.  Such acquisitions are exempt from Section 16 concurrent reporting requirements pursuant to Rule 16b-3.
Award of Class A Common Stock which vests on November 18, 2022 if the performance metric described in the applicable Stock Incentive Award Agreement (the "SIA") is achieved. The performance metric is the achievement of a three year (fiscal 2020-2022) cumulative adjusted operating income target as set forth in the SIA. If the performance metric is not achieved, the award expires.
Includes 3,996.473 shares of Class A Common Stock which vest on November 13, 2020 if the performance metric described in the applicable SIA is achieved; 5,587.33 shares of Class A Common Stock which vest on November 29, 2021 if the performance metric described in the applicable SIA is achieved and 3,611.914 shares of Class A Common Stock which vest on November 18, 2022 if the performance metric described in the applicable SIA is achieved.
Award of performance Class A Common Stock which vests on November 18, 2022 if the performance metrics described in the applicable SIA are achieved. The performance metrics set forth in the SIA are (1) achievement of a three year (fiscal 2020-2022) cumulative operating income target and (2) a favorable comparison of the relative total shareholder return of the Issuer's Class A Common Stock compared to a predetermined peer group of publicly traded companies over a three year (fiscal 2020-2022) period. Subject to the achievement of the performance metrics, the performance shares could vest at a level of 50 to 200 percent and are reported as derivative securities at the 200 percent level. If neither of the performance metrics are achieved, the award expires.
The stock options vest at 33 1/3 percent on each of the first, second, and third anniversary dates of the grant.
/s/ J. Scott Spradley
2019-11-20