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 12, 2000 ACE LIMITED (Exact name of registrant as specified in its charter) Cayman Islands 1-11778 98-0091805 (State or other jurisdiction (Commission (I.R.S. Employer of Incorporation) File Number) Identification No.) The ACE Building 30 Woodbourne Avenue Hamilton, Bermuda HM 08 (Address of principal executive offices) Zip Code) Registrant's telephone number, including area code: (441) 295-5200 Not Applicable (Former name or former address, if changed since last report) Item 5. Other Information On December 12, 2000, ACE Limited initiated legal action against CIGNA Corporation for breach of contract arising from ACE's $3.45 billion acquisition of CIGNA's property and casualty business. Included as an exhibit to this Current Report on Form 8-K is a copy of ACE's press release issued on December 13, 2000 relating to this action. 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. Dated: December 13, 2000 ACE LIMITED By: Christopher Z. Marshall ----------------------- Christopher Z. Marshall Chief Financial Officer EXHIBIT INDEX Exhibit Number Description - ------ ----------- 99.1 Press Release, dated December 13, 2000