------------------------------------------------------------------------------ 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 12, 2005 BURLINGTON RESOURCES INC. --------------------------------------------------- (Exact name of registrant as specified in its charter) DELAWARE 1-9971 91-1413284 ----------------------------- -------------- --------------------- (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 717 TEXAS AVENUE, SUITE 2100, HOUSTON, TEXAS 77002 -------------------------------------- ------------- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (713) 624-9000 NOT APPLICABLE --------------------------------------------------- Former name or former address, if changed since last report Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [x] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) ------------------------------------------------------------------------------ ITEM 8.01 OTHER EVENTS. On December 12, 2005, Burlington Resources Inc. (NYSE: BR) issued a joint press release with ConocoPhillips (NYSE: COP), a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference. ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS. (c) Exhibits. The following are furnished as Exhibits to this report: 99.1 Joint press release dated December 12, 2005 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. Burlington Resources Inc. Dated: December 13, 2005 By: /s/ Frederick J. Plaeger II ------------------------------------- Name: Frederick J. Plaeger II Title: Vice President and General Counsel EXHIBIT INDEX EXHIBIT NO. DESCRIPTION ----------- ----------- 99.1 Joint press release dated December 12, 2005