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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0000007332-05-000069.txt : 20050617
<SEC-HEADER>0000007332-05-000069.hdr.sgml : 20050617
<ACCEPTANCE-DATETIME>20050617164845
ACCESSION NUMBER:		0000007332-05-000069
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050615
FILED AS OF DATE:		20050617
DATE AS OF CHANGE:		20050617

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SOUTHWESTERN ENERGY CO
		CENTRAL INDEX KEY:			0000007332
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				710205415
		STATE OF INCORPORATION:			AR
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2350 N. SAM HOUSTON PARKWAY EAST
		STREET 2:		SUITE 300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77032
		BUSINESS PHONE:		2816184700

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ARKANSAS WESTERN GAS CO
		DATE OF NAME CHANGE:	19790917

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KERLEY GREGORY D
		CENTRAL INDEX KEY:			0001103813

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08246
		FILM NUMBER:		05903664

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		2816184700

	MAIL ADDRESS:	
		STREET 1:		2350 N. SAM HOUSTON PARKWAY EAST
		STREET 2:		SUITE 300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77032
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c0001103813d20050617f4f.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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            <rptOwnerState>TX</rptOwnerState>
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            <otherText></otherText>
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                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1052</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>1998-12-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2007-12-17</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1052</value>
                    <footnoteId id="F9"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6348</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options (Right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>6.25</value>
                <footnoteId id="F9"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-06-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>6348</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>1998-12-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2007-12-17</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>6348</value>
                    <footnoteId id="F9"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On May 20, 2005, the common stock of Southwestern Energy Company split 2-for-1, resulting in the reporting person's acquisition of 181,741 additional shares of common stock.</footnote>
        <footnote id="F2">Purchased through the Company's 401(k) plan from January 26, 2005, through May 26, 2005.</footnote>
        <footnote id="F3">On May 20, 2005, the common stock split 2-for-1, resulting in the reporting person's acquisition of 2,869.7852 through the Company's 401(k) plan.</footnote>
        <footnote id="F4">Purchased through the Company's Nonqualified Retirement Plan from January 26, 2005, through May 26, 2005.</footnote>
        <footnote id="F5">On May 20, 2005, the common stock of Southwestern Energy Company split 2-for-1, resulting in the reporting person's acquisition of 6,448.7158 shares through the Company's Nonqualified Retirement Plan.</footnote>
        <footnote id="F6">This option was previously reported as covering 15,674 shares at an exercise price of $7.3125, but was adjusted to reflect the stock split on May 20, 2005.</footnote>
        <footnote id="F7">This option was previously reported as covering 12,500 shares at an exercise price of $9.64, but was adjusted to reflect the stock split on May 20, 2005.</footnote>
        <footnote id="F8">This option was previously reported as covering 37,136 shares at an exercise price of $11.46 per share, but was adjusted to reflect the stock split on May 20, 2005.</footnote>
        <footnote id="F9">This option was previously reported as covering 3,700 shares at an exercise price of $12.50 per share, but was adjusted to reflect the stock split on May 20, 2005.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Melissa D. McCarty, Attorney-in-Fact</signatureName>
        <signatureDate>2005-06-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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