1 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 April 5, 1999 ----------------------------------- 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 (IRS Employer of incorporation) File No.) 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 2 Item 5. Other Events. In connection with the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995, and following the closing of the acquisition of Lightera Networks, Inc., CIENA Corporation is filing cautionary statements identifying important factors that could cause CIENA's actual results to differ materially from those projected in forward-looking statements made by or on behalf of CIENA. A first group of these statements relates primarily to CIENA's business prior to the acquisition of Lightera Networks, Inc. and the pending acquisition of Omnia Communications, Inc.; a second group of these statements address the ways in which certain risks are magnified or newly introduced as a result of these acquisitions. These statements amend and supersede prior cautionary statements filed by CIENA to the extent that they are inconsistent with those statements, and are also being re-formatted in response to the new "plain English" requirements of the Securities and Exchange Commission. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. (99) Additional Exhibits 99.1 Cautionary Statements for Purposes of the "Safe Harbor" Provisions of the Private Securities Litigation Reform Act of 1995. -2- 3 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 Date: April 5, 1999 By: /s/ G. Eric Georgatos ----------------------------------------------- Sr. Vice President, General Counsel and Secretary -3-