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 September 14, 1998 --------------------------------------------- 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 4 2 Item 5. Other Events. On September 14, 1998, CIENA issued press releases regarding (i) the mutual termination of its proposed merger with Tellabs, Inc., (ii) its fiscal third quarter results, (iii) the introduction of OC-192 capability for its MultiWave Sentry DWDM system, (iv) the bolstering of its strategy, marketing and sales functions, (v) a statement from CIENA's CEO, Patrick Nettles on the events of September 14, 1998 and (vi) Judge Sonia Sotomayor granting CIENA's motion for summary judgement in the Kimberlin litigation. Further details are included in a copy of the press releases, which are attached hereto as Exhibits 99.1 through 99.6 and incorporated by reference herein. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits. 99.1 Press Release, dated September 14, 1998. (regarding the mutual termination of CIENA's proposed merger with Tellabs, Inc.) 99.2 Press Release, dated September 14, 1998 (regarding CIENA's its fiscal third quarter results) 99.3 Press Release, dated September 14, 1998 (regarding the introduction of OC-192 capability for CIENA's MultiWave Sentry DWDM system) 99.4 Press Release, dated September 14, 1998 (regarding CIENA's strategy, marketing and sales functions) 99.5 Press Release, dated September 14, 1998 (statement from CIENA's CEO, Patrick Nettles on the events of September 14, 1998). 99.6 Press Release, dated September 14, 1998 (regarding Judge Sonia Sotomayor granting CIENA's motion for summary judgement in the Kimberlin litigation) 3 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized. CIENA Corporation Date: September 14, 1998 By: /s/ G. Eric Georgatos --------------------------------------------- G. Eric Georgatos Vice-President, General Counsel and Secretary 4 EXHIBIT INDEX Exhibit No. Description 99.1 Press Release, dated September 14, 1998. (regarding the mutual termination of CIENA's proposed merger with Tellabs, Inc.) 99.2 Press Release, dated September 14, 1998 (regarding CIENA's fiscal third quarter results) 99.3 Press Release, dated September 14, 1998 (regarding the introduction of OC-192 capability for CIENA's MultiWave Sentry DWDM system) 99.4 Press Release, dated September 14, 1998 (regarding CIENA's strategy, marketing and sales functions) 99.5 Press Release, dated September 14, 1998 (statement from CIENA's CEO, Patrick Nettles on the events of September 14, 1998). 99.6 Press Release, dated September 14, 1998 (regarding Judge Sonia Sotomayor granting CIENA's motion for summary judgement in the Kimberlin litigation)