<SEC-DOCUMENT>0001972362-25-000006.txt : 20250106
<SEC-HEADER>0001972362-25-000006.hdr.sgml : 20250106
<ACCEPTANCE-DATETIME>20250106160441
ACCESSION NUMBER:		0001972362-25-000006
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250106
DATE AS OF CHANGE:		20250106

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CIENA CORP
		CENTRAL INDEX KEY:			0000936395
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		ORGANIZATION NAME:           	04 Manufacturing
		IRS NUMBER:				232725311
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1102

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-36250
		FILM NUMBER:		25511032

	BUSINESS ADDRESS:	
		STREET 1:		7035 RIDGE ROAD
		CITY:			HANOVER
		STATE:			MD
		ZIP:			21076
		BUSINESS PHONE:		4108658500

	MAIL ADDRESS:	
		STREET 1:		7035 RIDGE ROAD
		CITY:			HANOVER
		STATE:			MD
		ZIP:			21076

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Claflin Bruce L.
		CENTRAL INDEX KEY:			0001403694
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		7035 RIDGE ROAD
		CITY:			HANOVER
		STATE:			MD
		ZIP:			21076
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001403694</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000936395</issuerCik>
      <issuerName>CIENA CORP</issuerName>
      <secFileNumber>001-36250</secFileNumber>
      <issuerAddress>
        <com:street1>7035 RIDGE ROAD</com:street1>
        <com:city>HANOVER</com:city>
        <com:stateOrCountry>MD</com:stateOrCountry>
        <com:zipCode>21076</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>4108658500</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Claflin Bruce L.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Morgan Stanley Smith Barney LLC Executive Services</name>
        <address>
          <com:street1>200 W Civic Center Dr - 4th Floor</com:street1>
          <com:city>Sandy</com:city>
          <com:stateOrCountry>UT</com:stateOrCountry>
          <com:zipCode>84070</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>16912</noOfUnitsSold>
      <aggregateMarketValue>1436851.38</aggregateMarketValue>
      <noOfUnitsOutstanding>142100000</noOfUnitsOutstanding>
      <approxSaleDate>01/06/2025</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <acquiredDate>03/20/2017</acquiredDate>
      <natureOfAcquisitionTransaction>RESTRICTED STOCK</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>8498</amountOfSecuritiesAcquired>
      <paymentDate>03/20/2017</paymentDate>
      <natureOfPayment>COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <acquiredDate>03/20/2015</acquiredDate>
      <natureOfAcquisitionTransaction>RESTRICTED STOCK</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>5654</amountOfSecuritiesAcquired>
      <paymentDate>03/20/2015</paymentDate>
      <natureOfPayment>COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <acquiredDate>03/21/2015</acquiredDate>
      <natureOfAcquisitionTransaction>RESTRICTED STOCK</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>2760</amountOfSecuritiesAcquired>
      <paymentDate>03/21/2015</paymentDate>
      <natureOfPayment>COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>01/06/2025</noticeDate>
      <signature>/s/ Bruce Laird Claflin</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
