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) December 8, 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 December 8, 1998, Tellabs, Inc. (the "Company") announced a multi-year agreement to supply Sprint Corporation with the Company's AN2100 Gateway Exchange, a trademark of Tellabs Operations, Inc., system. Further details are contained in a copy of the press release attached hereto as Exhibit 20.13, which is incorporated by reference herein. Item 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS (c) Exhibits Exhibit 20.13 - Press release issued by Tellabs, Inc. on December 8, 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. December 14, 1998 s\ J. Peter Johnson --------------------- J. Peter Johnson Vice President, Controller and Chief Accounting Officer 2