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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 C3v/pXN7V7odyt30nC+UY5vmdsbTh3AXRNOqsQjHSYg2qklCRh64jxr0vmOTNvmi
 7qIBBZhfNFUlTII2BXI9+w==

<SEC-DOCUMENT>0001181431-03-028213.txt : 20031030
<SEC-HEADER>0001181431-03-028213.hdr.sgml : 20031030
<ACCEPTANCE-DATETIME>20031030204805
ACCESSION NUMBER:		0001181431-03-028213
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030910
FILED AS OF DATE:		20031030

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WALDAL JEFF
		CENTRAL INDEX KEY:			0001268643

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-13059
		FILM NUMBER:		03968089

	BUSINESS ADDRESS:	
		STREET 1:		695 LACO DRIVE
		CITY:			LEXINGTON
		STATE:			KY
		ZIP:			40510
		BUSINESS PHONE:		8592553664

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CERADYNE INC
		CENTRAL INDEX KEY:			0000018937
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS MANUFACTURING INDUSTRIES [3990]
		IRS NUMBER:				330055414
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3169 RED HILL
		CITY:			COSTA MESA
		STATE:			CA
		ZIP:			92626
		BUSINESS PHONE:		7145490421

	MAIL ADDRESS:	
		STREET 2:		3169 RED HILL
		CITY:			COSTA MESA
		STATE:			CA
		ZIP:			92626
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd21276.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-09-10</periodOfReport><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000018937</issuerCik>
        <issuerName>CERADYNE INC</issuerName>
        <issuerTradingSymbol>CRDN</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001268643</rptOwnerCik>
            <rptOwnerName>WALDAL JEFF</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>713 MILL RIDGE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LEXINGTON</rptOwnerCity>
            <rptOwnerState>KY</rptOwnerState>
            <rptOwnerZipCode>40513</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Vice President</officerTitle></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Options</value><footnoteId id="F1"/></securityTitle><conversionOrExercisePrice><value>23.70</value></conversionOrExercisePrice><transactionDate><value>2003-09-10</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>2500</value></transactionShares><transactionPricePerShare><value>0</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-09-10</value></exerciseDate><expirationDate><value>2013-09-10</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value
>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>2500</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>18100</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">These options were approved by the Stock Option Committee on 09/10/2003 but were not disclosed to the reporting person until 10/27/2003.</footnote></footnotes><ownerSignature><signatureName>Jerrold J. Pellizzon</signatureName><signatureDate>2003-10-30</signatureDate></ownerSignature></ownershipDocument>



</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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