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                    <ns2:ccc>XXXXXXXX</ns2:ccc>
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            <ns2:liveTestFlag>LIVE</ns2:liveTestFlag>



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            <ns2:issuerCik>0000936395</ns2:issuerCik>
            <ns2:issuerName>Ciena Corporation</ns2:issuerName>
            <ns2:secFileNumber>001-36250</ns2:secFileNumber>
            <ns2:issuerAddress>
                <com:street1>7035 Ridge Road</com:street1>
                <com:city>Hanover</com:city>
                <com:stateOrCountry>MD</com:stateOrCountry>
                <com:zipCode>21076</com:zipCode>
            </ns2:issuerAddress>
            <ns2:issuerContactPhone>1-410-694-5700</ns2:issuerContactPhone>
            <ns2:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Gary B. Smith</ns2:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <ns2:relationshipsToIssuer>
                <ns2:relationshipToIssuer>Officer</ns2:relationshipToIssuer>
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        <ns2:securitiesInformation>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:brokerOrMarketmakerDetails>
                <ns2:name>Goldman Sachs &amp; Co. LLC</ns2:name>
                <ns2:address>
                    <com:street1>200 West Street</com:street1>
                    <com:city>New York</com:city>
                    <com:stateOrCountry>NY</com:stateOrCountry>
                    <com:zipCode>10282</com:zipCode>
                </ns2:address>
            </ns2:brokerOrMarketmakerDetails>
            <ns2:noOfUnitsSold>75004</ns2:noOfUnitsSold>
            <ns2:aggregateMarketValue>3660945.24</ns2:aggregateMarketValue>
            <ns2:noOfUnitsOutstanding>147842355</ns2:noOfUnitsOutstanding>
            <ns2:approxSaleDate>09/15/2023</ns2:approxSaleDate>
            <ns2:securitiesExchangeName>NYSE</ns2:securitiesExchangeName>
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            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:acquiredDate>03/20/2021</ns2:acquiredDate>
            <ns2:natureOfAcquisitionTransaction>Acquired as Compensation -- Restricted Stock Units</ns2:natureOfAcquisitionTransaction>
            <ns2:nameOfPersonfromWhomAcquired>Issuer</ns2:nameOfPersonfromWhomAcquired>
            <ns2:isGiftTransaction>N</ns2:isGiftTransaction>
            <ns2:amountOfSecuritiesAcquired>2911</ns2:amountOfSecuritiesAcquired>
            <ns2:paymentDate>03/20/2021</ns2:paymentDate>
            <ns2:natureOfPayment>Compensation</ns2:natureOfPayment>
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        <ns2:securitiesToBeSold>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
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            <ns2:natureOfAcquisitionTransaction>Acquired as Compensation -- Restricted Stock Units</ns2:natureOfAcquisitionTransaction>
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            <ns2:isGiftTransaction>N</ns2:isGiftTransaction>
            <ns2:amountOfSecuritiesAcquired>11863</ns2:amountOfSecuritiesAcquired>
            <ns2:paymentDate>06/20/2021</ns2:paymentDate>
            <ns2:natureOfPayment>Compensation</ns2:natureOfPayment>
        </ns2:securitiesToBeSold>
        <ns2:securitiesToBeSold>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:acquiredDate>09/20/2021</ns2:acquiredDate>
            <ns2:natureOfAcquisitionTransaction>Acquired as Compensation -- Restricted Stock Units</ns2:natureOfAcquisitionTransaction>
            <ns2:nameOfPersonfromWhomAcquired>Issuer</ns2:nameOfPersonfromWhomAcquired>
            <ns2:isGiftTransaction>N</ns2:isGiftTransaction>
            <ns2:amountOfSecuritiesAcquired>11861</ns2:amountOfSecuritiesAcquired>
            <ns2:paymentDate>09/20/2021</ns2:paymentDate>
            <ns2:natureOfPayment>Compensation</ns2:natureOfPayment>
        </ns2:securitiesToBeSold>
        <ns2:securitiesToBeSold>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:acquiredDate>12/20/2021</ns2:acquiredDate>
            <ns2:natureOfAcquisitionTransaction>Acquired as Compensation -- Restricted Stock Units</ns2:natureOfAcquisitionTransaction>
            <ns2:nameOfPersonfromWhomAcquired>Issuer</ns2:nameOfPersonfromWhomAcquired>
            <ns2:isGiftTransaction>N</ns2:isGiftTransaction>
            <ns2:amountOfSecuritiesAcquired>48369</ns2:amountOfSecuritiesAcquired>
            <ns2:paymentDate>12/20/2021</ns2:paymentDate>
            <ns2:natureOfPayment>Compensation</ns2:natureOfPayment>
        </ns2:securitiesToBeSold>
        <ns2:nothingToReportFlagOnSecuritiesSoldInPast3Months>N</ns2:nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <ns2:securitiesSoldInPast3Months>
            <ns2:sellerDetails>
                <ns2:name>GARY B. SMITH &amp; STACIA SMITH, TENANTS BY ENTIRETY</ns2:name>
                <ns2:address>
                    <com:street1>7035 Ridge Road</com:street1>
                    <com:city>Hanover</com:city>
                    <com:stateOrCountry>MD</com:stateOrCountry>
                    <com:zipCode>21076</com:zipCode>
                </ns2:address>
            </ns2:sellerDetails>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:saleDate>08/01/2023</ns2:saleDate>
            <ns2:amountOfSecuritiesSold>4166</ns2:amountOfSecuritiesSold>
            <ns2:grossProceeds>175436.09</ns2:grossProceeds>
        </ns2:securitiesSoldInPast3Months>
        <ns2:securitiesSoldInPast3Months>
            <ns2:sellerDetails>
                <ns2:name>GARY B. SMITH &amp; STACIA SMITH, TENANTS BY ENTIRETY</ns2:name>
                <ns2:address>
                    <com:street1>7035 Ridge Road</com:street1>
                    <com:city>Hanover</com:city>
                    <com:stateOrCountry>MD</com:stateOrCountry>
                    <com:zipCode>21076</com:zipCode>
                </ns2:address>
            </ns2:sellerDetails>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:saleDate>07/03/2023</ns2:saleDate>
            <ns2:amountOfSecuritiesSold>4174</ns2:amountOfSecuritiesSold>
            <ns2:grossProceeds>177315.69</ns2:grossProceeds>
        </ns2:securitiesSoldInPast3Months>
        <ns2:securitiesSoldInPast3Months>
            <ns2:sellerDetails>
                <ns2:name>GARY B. SMITH &amp; STACIA SMITH, TENANTS BY ENTIRETY</ns2:name>
                <ns2:address>
                    <com:street1>7035 Ridge Road</com:street1>
                    <com:city>Hanover</com:city>
                    <com:stateOrCountry>MD</com:stateOrCountry>
                    <com:zipCode>21076</com:zipCode>
                </ns2:address>
            </ns2:sellerDetails>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:saleDate>07/17/2023</ns2:saleDate>
            <ns2:amountOfSecuritiesSold>4166</ns2:amountOfSecuritiesSold>
            <ns2:grossProceeds>173620.97</ns2:grossProceeds>
        </ns2:securitiesSoldInPast3Months>
        <ns2:securitiesSoldInPast3Months>
            <ns2:sellerDetails>
                <ns2:name>GARY B. SMITH &amp; STACIA SMITH, TENANTS BY ENTIRETY</ns2:name>
                <ns2:address>
                    <com:street1>7035 Ridge Road</com:street1>
                    <com:city>Hanover</com:city>
                    <com:stateOrCountry>MD</com:stateOrCountry>
                    <com:zipCode>21076</com:zipCode>
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            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:saleDate>09/01/2023</ns2:saleDate>
            <ns2:amountOfSecuritiesSold>4166</ns2:amountOfSecuritiesSold>
            <ns2:grossProceeds>203239.98</ns2:grossProceeds>
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        <ns2:securitiesSoldInPast3Months>
            <ns2:sellerDetails>
                <ns2:name>GARY B. SMITH &amp; STACIA SMITH, TENANTS BY ENTIRETY</ns2:name>
                <ns2:address>
                    <com:street1>7035 Ridge Road</com:street1>
                    <com:city>Hanover</com:city>
                    <com:stateOrCountry>MD</com:stateOrCountry>
                    <com:zipCode>21076</com:zipCode>
                </ns2:address>
            </ns2:sellerDetails>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:saleDate>06/15/2023</ns2:saleDate>
            <ns2:amountOfSecuritiesSold>4174</ns2:amountOfSecuritiesSold>
            <ns2:grossProceeds>184865.21</ns2:grossProceeds>
        </ns2:securitiesSoldInPast3Months>
        <ns2:securitiesSoldInPast3Months>
            <ns2:sellerDetails>
                <ns2:name>GARY B. SMITH &amp; STACIA SMITH, TENANTS BY ENTIRETY</ns2:name>
                <ns2:address>
                    <com:street1>7035 Ridge Road</com:street1>
                    <com:city>Hanover</com:city>
                    <com:stateOrCountry>MD</com:stateOrCountry>
                    <com:zipCode>21076</com:zipCode>
                </ns2:address>
            </ns2:sellerDetails>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:saleDate>08/15/2023</ns2:saleDate>
            <ns2:amountOfSecuritiesSold>4166</ns2:amountOfSecuritiesSold>
            <ns2:grossProceeds>174644.55</ns2:grossProceeds>
        </ns2:securitiesSoldInPast3Months>
        <ns2:remarks>The sales of shares set forth herein are made in connection with a selling plan dated March 11, 2023 that is intended to comply with Rule 10b5-1(c).</ns2:remarks>
        <ns2:noticeSignature>
            <ns2:noticeDate>09/15/2023</ns2:noticeDate>
            <ns2:planAdoptionDates>
                <ns2:planAdoptionDate>03/11/2023</ns2:planAdoptionDate>
            </ns2:planAdoptionDates>
            <ns2:signature>Goldman Sachs &amp; Co. LLC on behalf of Gary B. Smith</ns2:signature>
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144
0001032553
XXXXXXXX
LIVE
0000936395
Ciena Corporation
001-36250
7035 Ridge Road
Hanover
MD
21076
1-410-694-5700
Gary B. Smith
Officer
Common Stock
Goldman Sachs & Co. LLC
200 West Street
New York
NY
10282
75004
3660945.24
147842355
09/15/2023
NYSE
Common Stock
03/20/2021
Acquired as Compensation -- Restricted Stock Units
Issuer
N
2911
03/20/2021
Compensation
Common Stock
06/20/2021
Acquired as Compensation -- Restricted Stock Units
Issuer
N
11863
06/20/2021
Compensation
Common Stock
09/20/2021
Acquired as Compensation -- Restricted Stock Units
Issuer
N
11861
09/20/2021
Compensation
Common Stock
12/20/2021
Acquired as Compensation -- Restricted Stock Units
Issuer
N
48369
12/20/2021
Compensation
N
GARY B. SMITH & STACIA SMITH, TENANTS BY ENTIRETY
7035 Ridge Road
Hanover
MD
21076
Common Stock
08/01/2023
4166
175436.09
GARY B. SMITH & STACIA SMITH, TENANTS BY ENTIRETY
7035 Ridge Road
Hanover
MD
21076
Common Stock
07/03/2023
4174
177315.69
GARY B. SMITH & STACIA SMITH, TENANTS BY ENTIRETY
7035 Ridge Road
Hanover
MD
21076
Common Stock
07/17/2023
4166
173620.97
GARY B. SMITH & STACIA SMITH, TENANTS BY ENTIRETY
7035 Ridge Road
Hanover
MD
21076
Common Stock
09/01/2023
4166
203239.98
GARY B. SMITH & STACIA SMITH, TENANTS BY ENTIRETY
7035 Ridge Road
Hanover
MD
21076
Common Stock
06/15/2023
4174
184865.21
GARY B. SMITH & STACIA SMITH, TENANTS BY ENTIRETY
7035 Ridge Road
Hanover
MD
21076
Common Stock
08/15/2023
4166
174644.55
The sales of shares set forth herein are made in connection with a selling plan dated March 11, 2023 that is intended to comply with Rule 10b5-1(c).
09/15/2023
03/11/2023
Goldman Sachs & Co. LLC on behalf of Gary B. Smith