<SEC-DOCUMENT>0001062993-25-013624.txt : 20250805
<SEC-HEADER>0001062993-25-013624.hdr.sgml : 20250805
<ACCEPTANCE-DATETIME>20250805175218
ACCESSION NUMBER:		0001062993-25-013624
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20250801
FILED AS OF DATE:		20250805
DATE AS OF CHANGE:		20250805

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Graff Marc D.
		CENTRAL INDEX KEY:			0002080157
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36250
		FILM NUMBER:		251186437

	MAIL ADDRESS:	
		STREET 1:		C/O CIENA CORPORATION
		STREET 2:		7035 RIDGE ROAD
		CITY:			HANOVER
		STATE:			MD
		ZIP:			21076-1426

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CIENA CORP
		CENTRAL INDEX KEY:			0000936395
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				232725311
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1101

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>form3.xml
<DESCRIPTION>INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2025-08-01</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000936395</issuerCik>
        <issuerName>CIENA CORP</issuerName>
        <issuerTradingSymbol>CIEN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002080157</rptOwnerCik>
            <rptOwnerName>Graff Marc D.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CIENA CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>7035 RIDGE RD.</rptOwnerStreet2>
            <rptOwnerCity>HANOVER</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21076-1426</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP &amp; Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>By: Michelle Rankin For: Marc D. Graff</signatureName>
        <signatureDate>2025-08-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>exhibit24.htm
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
<html>
  <head>
    <title></title>

  </head>
<body style="font-family: &#39;Times New Roman&#39;, Times, serif; font-size: 10pt; text-align: left; color: #000000;" bgcolor="#ffffff">
  <div>
    <div style="text-align: center; line-height: 12.55pt; font-family: &#39;CG Times&#39;, &#39;Times New Roman&#39;, serif; font-size: 11pt; font-weight: bold;">POWER OF ATTORNEY</div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="text-align: justify; text-indent: 36pt; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">The undersigned hereby constitutes and appoints Sheela Kosaraju, Erik J. Lichter and
      Michelle Rankin, and each of them, the undersigned&#8217;s true and lawful attorney-in-fact, and with full power of substitution, re-substitution and delegation to:</div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div>
      <table style="font-family: &#39;Times New Roman&#39;, Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;" id="z38eb3e940cf4433b92d75e1f3f32a740" cellpadding="0" cellspacing="0">

          <tr>
            <td style="width: 72pt; vertical-align: top; text-align: right;">
              <div style="text-align: justify; margin-left: 36pt; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">(1)</div>
            </td>
            <td style="width: auto; vertical-align: top;">
              <div style="text-align: justify; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">prepare and execute for and on behalf of the undersigned Form ID, Forms 3, 4 and 5, and all
                amendments thereto in accordance with Section 16(a) of the Securities and Exchange Act of 1934, as amended, and the rules thereunder;</div>
            </td>
          </tr>

      </table>
    </div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div>
      <table style="font-family: &#39;Times New Roman&#39;, Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;" id="z0cfc8f5760b54f7f8f1107df10b87c78" cellpadding="0" cellspacing="0">

          <tr>
            <td style="width: 72pt; vertical-align: top; text-align: right;">
              <div style="text-align: justify; margin-left: 36pt; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">(2)</div>
            </td>
            <td style="width: auto; vertical-align: top;">
              <div style="text-align: justify; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">do and perform any and all acts for and on behalf of the undersigned which may be necessary or
                desirable to complete and execute any such Form ID, Form 3, 4 or 5, or any amendment or amendments thereto and file such form with the United States Securities and Exchange Commission, the New York Stock Exchange, and any other authority;
                and</div>
            </td>
          </tr>

      </table>
    </div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div>
      <table style="font-family: &#39;Times New Roman&#39;, Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;" id="zca19b3ed02534be598d18bc81d676c78" cellpadding="0" cellspacing="0">

          <tr>
            <td style="width: 72pt; vertical-align: top; text-align: right;">
              <div style="text-align: justify; margin-left: 36pt; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">(3)</div>
            </td>
            <td style="width: auto; vertical-align: top;">
              <div style="text-align: justify; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">take any other action of any type whatsoever in connection with the foregoing which, in the opinion
                of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power
                of Attorney shall be in such form and shall contain such terms as such attorney-in-fact may approve in such attorney-in-fact's discretion.</div>
            </td>
          </tr>

      </table>
    </div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="text-align: justify; text-indent: 36pt; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">The undersigned hereby grants to each such attorney-in-fact full power and authority to do
      and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally
      present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact&#8217;s substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney
      and the rights and powers herein granted.&#160; The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming any of the undersigned&#8217;s responsibilities to comply with
      Section 16 of the Securities Exchange Act of 1934, as amended. <a name="z_Hlk200113586"></a>This Power of Attorney can only be revoked by delivering a signed, original &#8220;Revocation of Power of Attorney&#8221; to the attorney-in-fact and shall remain in
      full force and effect until such revocation is delivered.</div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="text-align: justify; text-indent: 36pt; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of
      this 5<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">th</sup> day of August, 2025.</div>
    <div style="text-align: justify; text-indent: 36pt; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;"> <br>
    </div>
    <div style="text-align: right; text-indent: 36pt; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;"><u>/s/ Marc D. Graff&#160;&#160;&#160;&#160; </u><br>
    </div>
    <div style="text-align: right; text-indent: 36pt; line-height: 12.55pt; font-family: &#39;CG Times&#39;,&#39;Times New Roman&#39;,serif; font-size: 11pt;">Marc D. Graff&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <br>
    </div>
  </div>
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</html>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
