<SEC-DOCUMENT>0001193125-15-299091-index.html : 20150821
<SEC-HEADER>0001193125-15-299091.hdr.sgml : 20150821
<ACCEPTANCE-DATETIME>20150821163947
ACCESSION NUMBER:		0001193125-15-299091
CONFORMED SUBMISSION TYPE:	SC TO-I
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20150821
DATE AS OF CHANGE:		20150821

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CIENA CORP
		CENTRAL INDEX KEY:			0000936395
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		IRS NUMBER:				232725311
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		SC TO-I
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-54195
		FILM NUMBER:		151069228

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CIENA CORP
		CENTRAL INDEX KEY:			0000936395
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		IRS NUMBER:				232725311
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		SC TO-I

	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>SC TO-I
<SEQUENCE>1
<FILENAME>d98560dsctoi.htm
<DESCRIPTION>SC TO-I
<TEXT>
Document 1 - file: d98560dsctoi.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A.1.A
<SEQUENCE>2
<FILENAME>d98560dex99a1a.htm
<DESCRIPTION>EX-99.A.1.A
<TEXT>
Document 2 - file: d98560dex99a1a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A.1.B
<SEQUENCE>3
<FILENAME>d98560dex99a1b.htm
<DESCRIPTION>EX-99.A.1.B
<TEXT>
Document 3 - file: d98560dex99a1b.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A.1.C
<SEQUENCE>4
<FILENAME>d98560dex99a1c.htm
<DESCRIPTION>EX-99.A.1.C
<TEXT>
Document 4 - file: d98560dex99a1c.htm

</DOCUMENT>
</SEC-DOCUMENT>