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): February 1, 2002 AMERICAN MEDICAL SECURITY GROUP, INC. (Exact name of Registrant as specified in its charter) Wisconsin 1-13154 39-1431799 (State of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.) 3100 AMS Boulevard, Green Bay, Wisconsin 54313 (Address of principal executive offices) (Zip Code) (920) 661-1111 (Registrant's telephone number, including area code) -------------- Item 5. Other Events and Regulation FD Disclosure. On February 1, 2002, American Medical Security Group, Inc. ("Company") formally amended the Rights Agreement by and between the Company and Firstar Bank, N.A., (the "Rights Agreement") dated as of August 9, 2001, to confirm how certain provisions would apply to a possible, future purchase of Cobalt Corporation ("Cobalt"). Cobalt's wholly owned subsidiary, Blue Cross & Blue Shield United of Wisconsin ("BCBSUW"), is the Company's largest shareholder. In return for the amendment, BCBSUW has withdrawn its shareholder proposal to redeem shareholders' rights pursuant to the Rights Agreement and has agreed to refrain from submitting a proposal relating to the Rights Agreement for action at any meeting of the Company's shareholders prior to December 31, 2003, unless the Company alters the amended language. The amendment clarifies the original intent of certain provisions of the Rights Agreement to confirm that it would not be automatically triggered solely by a potential purchaser of Cobalt entering into an agreement to acquire the shares of Cobalt or BCBSUW or the consummation of such a transaction. In either case, the Rights Agreement would apply in the event a purchaser owns any common stock of the Company ("Common Stock") other than that acquired in a Cobalt transaction, or later acquired additional Common Stock without the permission of the Company's Board of Directors. Effective January 1, 2002, LaSalle Bank National Association ("LaSalle Bank") became the successor rights agent under the Rights Agreement pursuant to an Appointment and Assumption Agreement between the Company and LaSalle Bank. Item 7. Financial Statements and Exhibits (c) Exhibits See the Exhibit Index following the Signature page of this report, which is incorporated herein by reference. 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 thereunto duly authorized. AMERICAN MEDICAL SECURITY GROUP, INC. Dated: February 5, 2002 /s/ Timothy J. Moore ----------------------- ------------------------------------------- Timothy J. Moore Senior Vice President of Corporate Affairs, Secretary & General Counsel AMERICAN MEDICAL SECURITY GROUP, INC. (Commission File No. 1-13154) EXHIBIT INDEX To FORM 8-K CURRENT REPORT Date of Report: February 1, 2002 Exhibit No. Description Filed Herewith 4.1 Amendment, dated as of February 1, 2002, to Rights Agreement, X dated as of August 9, 2001 between American Medical Security Group, Inc. and Firstar Bank, N.A. ("Rights Agreement"). 4.2 Appointment and Assumption Agreement dated December 17, 2001, X between the Company and Firstar Bank, N.A., appointing LaSalle Bank, N.A. as Rights Agent for the Rights Agreement. 10.1 Agreement dated February 1, 2002, among the Company, Cobalt X Corporation and Blue Cross & Blue Shield United of Wisconsin concerning the Rights Agreement. EX-1