<SEC-DOCUMENT>0001104659-15-002999.txt : 20150116
<SEC-HEADER>0001104659-15-002999.hdr.sgml : 20150116
<ACCEPTANCE-DATETIME>20150116170926
ACCESSION NUMBER:		0001104659-15-002999
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20150114
FILED AS OF DATE:		20150116
DATE AS OF CHANGE:		20150116

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SPX CORP
		CENTRAL INDEX KEY:			0000088205
		STANDARD INDUSTRIAL CLASSIFICATION:	METALWORKING MACHINERY & EQUIPMENT [3540]
		IRS NUMBER:				381016240
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		13320 BALLANTYNE CORPORATE PLACE
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28277
		BUSINESS PHONE:		704-752-4400

	MAIL ADDRESS:	
		STREET 1:		13320 BALLANTYNE CORPORATE PLACE
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28277

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SEALED POWER CORP
		DATE OF NAME CHANGE:	19880515

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BATCHELDER DAVID H
		CENTRAL INDEX KEY:			0000947324

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06948
		FILM NUMBER:		15533304

	MAIL ADDRESS:	
		STREET 1:		RELATIONAL INVESTORS LLC
		STREET 2:		12400 HIGH BLUFF DRIVE. SUITE 600
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92130

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WHITWORTH RALPH V
		CENTRAL INDEX KEY:			0001052622

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06948
		FILM NUMBER:		15533305

	MAIL ADDRESS:	
		STREET 1:		RELATIONAL INVESTORS LLC
		STREET 2:		12400 HIGH BLUFF DRIVE, SUITE 600
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92130

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RELATIONAL INVESTORS LLC
		CENTRAL INDEX KEY:			0001047644
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06948
		FILM NUMBER:		15533306

	BUSINESS ADDRESS:	
		STREET 1:		12400 HIGH BLUFF DRIVE
		STREET 2:		SUITE 600
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92130
		BUSINESS PHONE:		858.704.3333

	MAIL ADDRESS:	
		STREET 1:		12400 HIGH BLUFF DRIVE
		STREET 2:		SUITE 600
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92130
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-01-14</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000088205</issuerCik>
        <issuerName>SPX CORP</issuerName>
        <issuerTradingSymbol>SPW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001047644</rptOwnerCik>
            <rptOwnerName>RELATIONAL INVESTORS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>12400 HIGH BLUFF DRIVE, SUITE 600</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92130</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001052622</rptOwnerCik>
            <rptOwnerName>WHITWORTH RALPH V</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>12400 HIGH BLUFF DRIVE, SUITE 600</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92130</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000947324</rptOwnerCik>
            <rptOwnerName>BATCHELDER DAVID H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>12400 HIGH BLUFF DRIVE, SUITE 600</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92130</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2015-01-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>230446</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>81.70</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4059075</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Through Limited Partnerships and managed accounts managed by reporting persons</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Relational Investors LLC (&quot;RILLC&quot;) is the general partner or investment manager of certain affiliated entities.  RILLC and the affiliated entities own a total of 4,059,075 shares. RILLC is managed by Ralph V. Whitworth and David H. Batchelder, each of which is a reporting person hereunder. Ralph V. Whitworth and David H. Batchelder disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein.</footnote>
        <footnote id="F2">The price in column 4 is a weighted average price.  The prices actually received ranged from $81.50 to $82.23.  Upon request, the reporting persons will provide to the Issuer, any security holder of the Issuer, or the SEC staff information regarding the number of shares sold at each price within the range.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Relational Investors LLC By: /s/ Ralph V. Whitworth, Principal</signatureName>
        <signatureDate>2015-01-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Ralph V. Whitworth</signatureName>
        <signatureDate>2015-01-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ David H. Batchelder</signatureName>
        <signatureDate>2015-01-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
