    <SEC-DOCUMENT>0001104659-18-032996-index.html : 20180514
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    <ACCEPTANCE-DATETIME>20180514170127
    ACCESSION NUMBER:		0001104659-18-032996
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		12
    FILED AS OF DATE:		20180514
    DATE AS OF CHANGE:		20180514
    EFFECTIVENESS DATE:		20180514

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			SM Energy Co
    		CENTRAL INDEX KEY:			0000893538
    		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
    		IRS NUMBER:				410518430
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-31539
    		FILM NUMBER:		18831635

    	BUSINESS ADDRESS:
    		STREET 1:		1775 SHERMAN STREET
    		STREET 2:		SUITE 1200
    		CITY:			DENVER
    		STATE:			CO
    		ZIP:			80203
    		BUSINESS PHONE:		303-861-8140

    	MAIL ADDRESS:
    		STREET 1:		1775 SHERMAN STREET
    		STREET 2:		SUITE 1200
    		CITY:			DENVER
    		STATE:			CO
    		ZIP:			80203

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	ST MARY LAND & EXPLORATION CO
    		DATE OF NAME CHANGE:	19940228
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
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    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: a18-13371_2defa14a.htm

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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g133712bgi001.gif

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    <SEQUENCE>3
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g133712bgi002.gif

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    <SEQUENCE>4
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g133712bgi003.gif

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    <SEQUENCE>5
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g133712bgi004.gif

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    <SEQUENCE>6
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g133712bgi005.gif

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    <SEQUENCE>7
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g133712bgi006.gif

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    <SEQUENCE>8
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g133712bgi007.gif

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    <SEQUENCE>9
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g133712bgi008.gif

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    <SEQUENCE>10
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g133712bgi009.gif

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    <SEQUENCE>11
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: g133712bgi010.gif

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    <SEQUENCE>12
    <FILENAME>g133712bgi011.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: g133712bgi011.gif

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    </SEC-DOCUMENT>