SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 August 19, 2004 Date of Report (Date of earliest event reported) CIENA Corporation (Exact name of registrant as specified in its charter) Delaware 0-21969 23-2725311 (State or other jurisdiction (Commission File No.) (IRS Employer of incorporation) Identification No.) 1201 Winterson Road, Linthicum, Maryland 21090 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (410) 865-8500 Not applicable (Former name or former address, if changed since last report) Exhibit Index on Page 2 The information in this Report, including the exhibit, is furnished under Item 12 of Form 8-K and, pursuant to General Instruction B.6. thereunder, is not "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934. Furthermore, the information in this Report, including the exhibit, is not incorporated by reference into the filings of the registrant under the Securities Act of 1933. ITEM 12 -- RESULTS OF OPERATIONS AND FINANCIAL CONDITION On August 19, 2004, CIENA Corporation issued a press release announcing its financial results for the fiscal quarter ended July 31, 2004. The text of the press release is furnished as Exhibit 99.1 to this Report. EXHIBIT INDEX Exhibit Number Description of Document -------------- ----------------------- Exhibit 99.1 Text of Press Release dated August 19, 2004, issued by CIENA Corporation, reporting its results of operations for the third quarter of fiscal 2004. -2- SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. CIENA CORPORATION Dated: August 19, 2004 By: /s/ Russell B. Stevenson, Jr. ---------------------------------------------- Senior Vice President, General Counsel and Secretary -3-