SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ----------------- FORM 8-K/A CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (date of earliest event reported): June 12, 2001 PATINA OIL & GAS CORPORATION (Exact Name of Registrant as Specified in Charter) Delaware 1-14344 75-2629477 (State of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 1625 Broadway Denver, Colorado 80202 (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: (303) 592-8500 ITEM 5. OTHER EVENTS The attached Exhibit 4.1 amends and restates Exhibit 4.1 to the Current Report on Form 8-K filed on May 25, 2000 to correct a typographical error contained therein. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits as follows: 4.1 Rights Agreement, dated as of May 25, 2001, between the Company and Mellon Investor Services LLC, as Rights Agent, specifying the terms of the Rights, which includes the form of Certificate of Designations of Series A Junior Participating Preferred Stock as Exhibit A, the form of Right Certificate as Exhibit B and the form of the Summary of Rights to Purchase Preferred Shares as Exhibit C.* * Incorporated by reference to the Company's Registration Statement on Form 8-A/A filed with the Securities and Exchange Commission on June 12, 2001 (File No. 001-14344). All other items of this report are inapplicable. 2 SIGNATURE Pursuant to the requirements of Section 12 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. Dated: June 12, 2001 PATINA OIL & GAS CORPORATION By: /s/ Thomas J. Edelman -------------------------------------- Name: Thomas J. Edelman Title: Chairman of the Board and Chief Executive Officer 3 EXHIBIT INDEX Exhibit No. Description - ----------- ------------------------------------------------------------------ 4.1 Rights Agreement, dated as of May 25, 2001, between the Company and Mellon Investor Services LLC, as Rights Agent, specifying the terms of the Rights, which includes the form of Certificate of Designations of Series A Junior Participating Preferred Stock as Exhibit A, the form of Right Certificate as Exhibit B and the form of the Summary of Rights to Purchase Preferred Shares as Exhibit C.* * Incorporated by reference to the Company's Registration Statement on Form 8-A/A filed with the Securities and Exchange Commission on June 12, 2001 (File No. 001-14344). 4