<SEC-DOCUMENT>0000091142-21-000088.txt : 20210512
<SEC-HEADER>0000091142-21-000088.hdr.sgml : 20210512
<ACCEPTANCE-DATETIME>20210512161054
ACCESSION NUMBER:		0000091142-21-000088
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210511
FILED AS OF DATE:		20210512
DATE AS OF CHANGE:		20210512

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Warren David R
		CENTRAL INDEX KEY:			0001710905

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-00475
		FILM NUMBER:		21915182

	MAIL ADDRESS:	
		STREET 1:		A. O. SMITH CORPORATION
		STREET 2:		500 TENNESSEE WALTZ PARKWAY
		CITY:			ASHLAND CITY
		STATE:			TN
		ZIP:			37015

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SMITH A O CORP
		CENTRAL INDEX KEY:			0000091142
		STANDARD INDUSTRIAL CLASSIFICATION:	HOUSEHOLD APPLIANCES [3630]
		IRS NUMBER:				390619790
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		11270 WEST PARK PLACE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53224
		BUSINESS PHONE:		4143594000

	MAIL ADDRESS:	
		STREET 1:		11270 WEST PARK PLACE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53224
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>PRIMARY DOCUMENT
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    <periodOfReport>2021-05-11</periodOfReport>

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        <issuerName>SMITH A O CORP</issuerName>
        <issuerTradingSymbol>AOS</issuerTradingSymbol>
    </issuer>

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            <rptOwnerName>Warren David R</rptOwnerName>
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            <rptOwnerStreet1>A. O. SMITH CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>500 TENNESSEE WALTZ PARKWAY</rptOwnerStreet2>
            <rptOwnerCity>ASHLAND CITY</rptOwnerCity>
            <rptOwnerState>TN</rptOwnerState>
            <rptOwnerZipCode>37015</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Senior VP &amp; President and GM</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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                    <value>1714</value>
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                <transactionPricePerShare>
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                    <value>42.39</value>
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                <transactionAcquiredDisposedCode>
                    <value>A</value>
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                <sharesOwnedFollowingTransaction>
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                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>30392</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>70.7879</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Options (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>23.235</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-05-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>1714</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <expirationDate>
                <value>2024-02-10</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1714</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>78092</value>
                </sharesOwnedFollowingTransaction>
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        <derivativeTransaction>
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            </securityTitle>
            <conversionOrExercisePrice>
                <value>30.765</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-05-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3492</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
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            </expirationDate>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3492</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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                <transactionFormType>4</transactionFormType>
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                <transactionShares>
                    <value>11377</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
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            <expirationDate>
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                </directOrIndirectOwnership>
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            <securityTitle>
                <value>Employee Stock Options (Right to Buy)</value>
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            <transactionDate>
                <value>2021-05-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>8099</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <value>2030-02-10</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>8099</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>49414</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The price in Column 4 is a weighted average price.  The prices actually received ranged from $70.69 to $70.94.  The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported on this Form 4 utilizing an average weighted price.</footnote>
        <footnote id="F2">The employee stock options were granted on 02/10/2014 under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3.  The options became exercisable in three annual installments of 1/3 of the award starting on 02/10/2015.</footnote>
        <footnote id="F3">The employee stock options were granted on 02/09/2015 under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3.  The options became exercisable in three annual installments of 1/3 of the award starting on 02/09/2016.</footnote>
        <footnote id="F4">The employee stock options were granted on 02/08/2016 under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3.  The options became exercisable in three annual installments of 1/3 of the award starting on 02/08/2017.</footnote>
        <footnote id="F5">The employee stock options were granted on 02/11/2019 under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3.  The options became exercisable in three annual installments of 1/3 of the award starting on 02/11/2020.</footnote>
        <footnote id="F6">The employee stock options were granted on 02/10/2020 under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3.  The options became exercisable in three annual installments of 1/3 of the award starting on 02/10/2021.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>James F. Stern, Attorney-in-Fact for David R. Warren</signatureName>
        <signatureDate>2021-05-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
