UNITED STATES 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 9, 1999 001-13836 (Commission File Number) ------------------------------ TYCO INTERNATIONAL LTD. (Exact name of registrant as specified in its charter) Bermuda Not applicable (State of Incorporation) (IRS Employer Identification Number) The Gibbons Building, 10 Queen Street, Suite 301, Hamilton, HM11, Bermuda (Address of registrant's principal executive office) 441-292-8674* (Registrant's telephone number) ------------------------------ *The executive offices of Registrant's principal United States subsidiary, Tyco International (US) Inc., are located at One Tyco Park, Exeter, New Hampshire 03833. The telephone number there is (603) 778-9700. ITEM 5. Other Events Reference is made to the press release issued to the public by the Registrant on December 9, 1999, the text of which is attached hereto as Exhibit 99.1, for a description of the events reported pursuant to this Form 8-K. ITEM 7. Financial Statements, Pro Forma Financial Information and Exhibits (c) Exhibits. Exhibit Number Title - -------------- ----- 99.1 Press Release dated December 9, 1999 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. TYCO INTERNATIONAL LTD. By: /s/ Mark H. Swartz --------------------------------- Mark H. Swartz Executive Vice President and Chief Financial Officer (Principal Accounting and Financial Officer) Date: December 9, 1999 Exhibit Index Exhibit Number Title - -------------- ----- 99.1 Press Release dated December 9, 1999