<SEC-DOCUMENT>0001021635-15-000122.txt : 20151117
<SEC-HEADER>0001021635-15-000122.hdr.sgml : 20151117
<ACCEPTANCE-DATETIME>20151117145730
ACCESSION NUMBER:		0001021635-15-000122
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20151113
FILED AS OF DATE:		20151117
DATE AS OF CHANGE:		20151117

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OGE ENERGY CORP.
		CENTRAL INDEX KEY:			0001021635
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]
		IRS NUMBER:				731481638
		STATE OF INCORPORATION:			OK
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		321 N HARVEY
		STREET 2:		P.O. BOX 321
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73101-0321
		BUSINESS PHONE:		4055533000

	MAIL ADDRESS:	
		STREET 1:		321 N HARVEY
		STREET 2:		P.O. BOX 321
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73101-0321

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OGE ENERGY CORP
		DATE OF NAME CHANGE:	19960827

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Mitchell E Keith
		CENTRAL INDEX KEY:			0001424581

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12579
		FILM NUMBER:		151237993

	MAIL ADDRESS:	
		STREET 1:		515 CENTRAL PARK
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73105
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_144779024002298.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-11-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001021635</issuerCik>
        <issuerName>OGE ENERGY CORP.</issuerName>
        <issuerTradingSymbol>OGE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001424581</rptOwnerCik>
            <rptOwnerName>Mitchell E Keith</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 321</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>OKLAHOMA CITY</rptOwnerCity>
            <rptOwnerState>OK</rptOwnerState>
            <rptOwnerZipCode>73101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Operating Officer (OG&amp;E)</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Equiv Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2015-11-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>I</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>21379.228</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>25.78</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Com Stk</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>21379.228</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>36071.156</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Security converts to common stock on a one-for-one basis.</footnote>
        <footnote id="F2">The Common Stock Units were accrued under the Deferred Compensation Plan of OGE Energy Corp. and are to be settled 100% in cash at a specified future date or following termination of service.</footnote>
        <footnote id="F3">The total includes shares acquired through the reinvestment of dividends that were exempt from reporting pursuant to Rule 16a-11.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Patricia D. Horn</signatureName>
        <signatureDate>2015-11-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>powerofattorney-mitchellpl.txt
<DESCRIPTION>POA APPOINTING TRISH HORN AND SEAN TRAUSCHKE AS SIGNERS
<TEXT>
POWER OF ATTORNEY


The undersigned hereby constitutes and appoints each of Patricia
D. Horn and Sean Trauschke, signing singly, the undersigned's
true and lawful attorney-in-fact to:

(I) execute for and on behalf of the undersigned, in the
undersigned's capacity as a director and/or officer of OGE
Energy Corp. (the "Company"), Forms 3, 4 and 5 in accordance
with Section 16(a) of the Securities Exchange Act of 1934, as
amended, and the rules and regulations thereunder:

(II) do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and
execute any such Form 3, 4 or 5 and timely file such form with
the United States Securities and Exchange Commission and any
stock exchange or similar authority; and

(III) take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of such attorney-in-
fact, may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the
documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such
form and shall contain such terms and conditions as such
attorney-in-fact may approve in his or her discretion.

The undersigned hereby grants to each attorney-in-fact named
above full power and authority to do and perform any and every
act requisite, necessary or proper to be done in the exercise of
any of the rights and powers herein granted, as fully as the
undersigned could do it personally present, with full power of
substitution or revocation, hereby ratifying and confirming all
that such attorney-in-fact, or such attorney-in-fact's
substitute or substitutes, shall lawfully do or cause to be done
by virtue of this Power of Attorney and the rights and powers
herein granted.  The undersigned acknowledges that the foregoing
attorney-in-fact, in serving in such capacity at the request of
the undersigned, are not assuming, nor is the company assuming,
any of the undersigned's responsibilities to comply with Section
16 of the Securities Exchange Act of 1934, as amended.

This Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 3, 4
and 5 with respect to the undersigned's holdings of, and
transactions in, securities issued by the Company, unless
earlier revoked by the undersigned in a signed writing delivered
to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed as of this 11th day of February, 2015.


/s/ E. Keith Mitchell, Pursuant to Power of Attorney being
filed herewith
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
