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 Date of Report (Date of earliest event reported) September 14, 1998 TELLABS, INC. (Exact name of registrant as specified in charter) Delaware 0-9692 36-3831568 (State or other jurisdiction (Commission (IRS employer of incorporation) file number) identification no.) 4951 Indiana Avenue, Lisle, Illinois 60532 (Address of principal executive office) (Zip Code) Registrant's telephone number, including area code (630) 378-8800 N/A (Former name or former address, if changed since last report) -1- ITEM 5. OTHER EVENTS On September 14, 1998, Tellabs, Inc., (the "Company") and CIENA Corporation ("CIENA"), announced the termination of their proposed merger. The Company and CIENA mutually agreed to the termination of the merger and have entered into a termination agreement (the "Termination Agreement"), which was approved by their respective Boards of Directors. Further details, including each company's press releases, are contained in the copy of the Termination Agreement, attached hereto as Exhibits 2.6, which is incorporated by reference herein. Item 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS (c) Exhibits Exhibit 2.6 - Termination Agreement between Tellabs, Inc. and CIENA Corporation dated as of September 14, 1998. SIGNATURE 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 hereunto duly authorized. TELLABS, INC. September 14, 1998 s\ J. Peter Johnson --------------------- J. Peter Johnson Vice President, Controller and Chief Accounting Officer -2-