<SEC-DOCUMENT>0001109357-20-000020.txt : 20200122
<SEC-HEADER>0001109357-20-000020.hdr.sgml : 20200122
<ACCEPTANCE-DATETIME>20200122164435
ACCESSION NUMBER:		0001109357-20-000020
CONFORMED SUBMISSION TYPE:	5
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20191231
FILED AS OF DATE:		20200122
DATE AS OF CHANGE:		20200122

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Innocenzo Michael
		CENTRAL INDEX KEY:			0001735897

	FILING VALUES:
		FORM TYPE:		5
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16169
		FILM NUMBER:		20539357

	MAIL ADDRESS:	
		STREET 1:		10 S. DEARBORN STREET
		STREET 2:		54TH FLOOR
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60603

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EXELON CORP
		CENTRAL INDEX KEY:			0001109357
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		IRS NUMBER:				232990190
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 805398
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60680-5398
		BUSINESS PHONE:		3123947399

	MAIL ADDRESS:	
		STREET 1:		PO BOX 805398
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60680-5398

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	EXELON Corp
		DATE OF NAME CHANGE:	20180928

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	EXELON CORP
		DATE OF NAME CHANGE:	20000315
</SEC-HEADER>
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<TYPE>5
<SEQUENCE>1
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        <issuerCik>0001109357</issuerCik>
        <issuerName>EXELON CORP</issuerName>
        <issuerTradingSymbol>EXC</issuerTradingSymbol>
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            <rptOwnerCik>0001735897</rptOwnerCik>
            <rptOwnerName>Innocenzo Michael</rptOwnerName>
        </reportingOwnerId>
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            <rptOwnerStreet1>10 S. DEARBORN STREET</rptOwnerStreet1>
            <rptOwnerStreet2>54TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60603</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President &amp; CEO of PECO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>NQ Stock Option (right to buy) 03/12/2012</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>39.81</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F9"/>
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                <underlyingSecurityTitle>
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                    <value>16000</value>
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                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>NQ Stock Option (right to buy) 01/25/2010</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>46.09</value>
            </conversionOrExercisePrice>
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                <footnoteId id="F9"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F9"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <underlyingSecurityShares>
                    <value>3800</value>
                </underlyingSecurityShares>
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                <sharesOwnedFollowingTransaction>
                    <value>3800</value>
                </sharesOwnedFollowingTransaction>
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        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Shares acquired through Exelon's Section 423 tax-qualified Employee Stock Purchase Plan.</footnote>
        <footnote id="F2">Previously awarded restricted stock units (RSUs) granted pursuant to the Exelon Long Term Incentive Plan.  RSUs are granted annually at the Compensation and Leadership Development committee's first meeting in January or February and vest in 1/3 increments on the date of the committee's first annual meeting in the first, second and third years after the award was granted.  Award balances accrue addtional RSUs through quarterly dividend reinvestment that vest on the same schedule as the underlying award.</footnote>
        <footnote id="F3">Balance includes 38 shares acquired through quarterly dividend reinvestment during 2019.</footnote>
        <footnote id="F4">Balance includes 144 shares acquired through quarterly dividend reinvestment during 2019.</footnote>
        <footnote id="F5">Balance includes 177 shares acquired through quarterly dividend reinvestment during 2019.</footnote>
        <footnote id="F6">Restricted stock unit award granted pursuant to the Exelon Long Term Incentive Plan.  All shares will cliff-vest on December 2, 2023.</footnote>
        <footnote id="F7">Phantom share equivalents representing units held in the Exelon stock fund in a multi-fund, non-qualified deferred compensation plan.  The Exelon stock fund is a unitized fund that consists of Exelon common stock and short term investments.  Units of the fund will be settled upon the reporting person's separation from the company for any reason. Units will be settled in cash.  Units are acquired through regular periodic contributions, company matching contributions and the reinvestment of dividend equivalents.  The balance of phantom share equivalents may fluctuate due to periodic changes in the fund composition.</footnote>
        <footnote id="F8">Balance includes 57 share equivalents accrued through quarterly dividend reinvestment during 2019.</footnote>
        <footnote id="F9">Non qualified employee stock options, awarded pursuant to the Exelon Long Term Incentive Plan.  Options are fully vested and expire on the tenth anniversay of the grant date referenced in Column 1.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Elizabeth M. Hensen, Attorney-in-Fact for Michael Innocenzo</signatureName>
        <signatureDate>2020-01-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</DOCUMENT>
</SEC-DOCUMENT>
