<SEC-DOCUMENT>0000711377-21-000007.txt : 20210326
<SEC-HEADER>0000711377-21-000007.hdr.sgml : 20210326
<ACCEPTANCE-DATETIME>20210326154638
ACCESSION NUMBER:		0000711377-21-000007
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210325
FILED AS OF DATE:		20210326
DATE AS OF CHANGE:		20210326

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PAPESH BRUCE
		CENTRAL INDEX KEY:			0001024152
		STATE OF INCORPORATION:			GA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-17988
		FILM NUMBER:		21777105

	MAIL ADDRESS:	
		STREET 1:		726 APPLEGATE LANE
		CITY:			EAST LANSING
		STATE:			MI
		ZIP:			48823

	FORMER NAME:	
		FORMER CONFORMED NAME:	PAPESH G BRUCE
		DATE OF NAME CHANGE:	19961003

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEOGEN CORP
		CENTRAL INDEX KEY:			0000711377
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				382367843
		STATE OF INCORPORATION:			MI
		FISCAL YEAR END:			0531

	BUSINESS ADDRESS:	
		STREET 1:		620 LESHER PLACE
		CITY:			LANSING
		STATE:			MI
		ZIP:			48912
		BUSINESS PHONE:		5173729200

	MAIL ADDRESS:	
		STREET 1:		620 LESHER PLACE
		CITY:			LANSING
		STATE:			MI
		ZIP:			48912
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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            <rptOwnerStreet2></rptOwnerStreet2>
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            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>48823</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
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    <nonDerivativeTable>
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                <value>Common Stock</value>
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            <transactionDate>
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                <transactionCode>M</transactionCode>
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                <transactionPricePerShare>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
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            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-03-25</value>
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                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2020-10-05</value>
            </exerciseDate>
            <expirationDate>
                <value>2027-10-05</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7890</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
        <derivativeTransaction>
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                <value>Common Stock (Right to Buy)</value>
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            </transactionDate>
            <transactionCoding>
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            <transactionTimeliness>
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                <transactionPricePerShare>
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            <exerciseDate>
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            <expirationDate>
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            </expirationDate>
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    <ownerSignature>
        <signatureName>Steven J Quinlan (Attorney in Fact)</signatureName>
        <signatureDate>2021-03-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
