-------------------------------------------------------------------------------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant [X] Filed by a Party other than the Registrant [ ] Check the appropriate box: [ ] Preliminary Proxy Statement [ ] Confidential, for Use of the Commission Only (as permitted by Rule14a-6(e)(2)) [ ] Definitive Proxy Statement [X] Definitive Additional Materials [ ] Soliciting Material Pursuant to Rule 14a-12 BURLINGTON RESOURCES INC. -------------------------------------------------------------------------------- (Name of Registrant as Specified in its Charter) -------------------------------------------------------------------------------- (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check the appropriate box): [X] No fee required [ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11. (1) Title of each class of securities to which transaction applies: ----------------------------------------------------------------- (2) Aggregate number of securities to which transaction applies: ----------------------------------------------------------------- (3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined): ----------------------------------------------------------------- (4) Proposed maximum aggregate value of transaction: ----------------------------------------------------------------- (5) Total fee paid: ----------------------------------------------------------------- [ ] Fee paid previously with preliminary materials: [ ] Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing. (1) Amount Previously Paid: ----------------------------------------------------------------- (2) Form, Schedule or Registration Statement No.: ----------------------------------------------------------------- (3) Filing Party: ----------------------------------------------------------------- (4) Date Filed: ----------------------------------------------------------------- -------------------------------------------------------------------------------- The following is a letter which was first sent by Burlington Resources Inc., on March 17, 2006, to all holders in street name of 1,000 shares or more, who have not voted on the proposal to approve and adopt the Agreement and Plan of Merger, dated as of December 12, 2005, by and among ConocoPhillips, Cello Acquisition Corp. and Burlington Resources Inc. -------------------------------------------------------------------------------- BURLINGTON RESOURCES IMPORTANT MESSAGE TO STOCKHOLDERS March 15, 2006 Dear Stockholder: Proxy Material for the Special Meeting of Stockholders of Burlington Resources Inc. was sent to you recently. Accordingly to our records, your proxy for this meeting, which will be held on Thursday, March 30, 2006, has not been received. For the reasons set forth in the proxy statement dated February 25, 2006, your Board of Directors unanimously recommends that Burlington stockholders vote `FOR' the proposal to approve and adopt the merger agreement. Regardless of the number of shares you own, it is important that they are represented and voted at the special meeting. Since the merger proposal is non discretionary, your broker cannot vote your shares for you on this proposal without your instructions. ACCORDINGLY, PLEASE TAKE A MOMENT NOW TO VOTE BY ANY OF THE THREE METHODS IDENTIFIED BELOW. WE ENCOURAGE YOU TO VOTE BY ANY ONE OF THE THREE METHODS LISTED BELOW: 1. VOTE BY TELEPHONE: CALL THE TOLL-FREE NUMBER LISTED FOR THIS PURPOSE ON YOUR VOTING INSTRUCTION FORM. HAVE YOUR 12-DIGIT CONTROL NUMBER LISTED ON THE FORM READY AND FOLLOW THE SIMPLE INSTRUCTIONS. 2. VOTE BY INTERNET: GO TO THE WEBSITE WWW.PROXYVOTE.COM LISTED ON YOUR VOTING INSTRUCTION FORM. HAVE YOUR 12-DIGIT CONTROL NUMBER LISTED ON THE FORM READY AND FOLLOW THE SIMPLE INSTRUCTIONS. 3. VOTE BY MAIL: PLEASE TAKE A MOMENT TO VOTE, SIGN, DATE AND MAIL THE ENCLOSED PROXY IN THE POSTAGE-PAID ENVELOPE INCLUDED FOR YOUR CONVENIENCE. YOUR VOTE IS IMPORTANT. THE AFFIRMATIVE VOTE OF THE HOLDERS OF AT LEAST A MAJORITY OF THE OUTSTANDING SHARES OF COMMON STOCK ENTITLED TO VOTE AT THE SPECIAL MEETING IS REQUIRED TO APPROVE THE MERGER AGREEMENT. Thank you for your response. Sincerely, /s/ Bobby S. Shackouls Bobby S. Shackouls Chairman of the Board, President and Chief Executive Officer -------------------------------------------------------------------------------- CAUTIONARY STATEMENTS RELEVANT TO FORWARD-LOOKING INFORMATION FOR THE PURPOSE OF "SAFE HARBOR" PROVISIONS OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 Except for the historical and factual information contained herein, the matters set forth in this filing, including statements as to the expected benefits of the acquisition such as efficiencies, cost savings, market profile and financial strength, timing expectations to complete the merger, and the competitive ability and position of the combined company, and other statements identified by words such as "estimates, "expects," "projects," "plans," and similar expressions are forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to risks and uncertainties that may cause actual results to differ materially, including required approvals by Burlington Resources shareholders and regulatory agencies, the possibility that the anticipated benefits from the acquisition cannot be fully realized, the possibility that costs or difficulties related to the integration of Burlington Resources operations into ConocoPhillips will be greater than expected, the impact of competition and other risk factors relating to our industry as detailed from time to time in each of ConocoPhillips' and Burlington Resources' reports filed with the SEC. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of their dates. Burlington Resources undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. ADDITIONAL INFORMATION AND WHERE TO FIND IT In connection with the proposed transaction, ConocoPhillips has filed an amended registration statement on Form S-4 and, on February 27, 2006, Burlington Resources filed a definitive proxy statement with the Securities and Exchange Commission (SEC) and began mailing the proxy statement to stockholders on February 25, 2006. Both companies will file other relevant documents concerning the proposed merger transaction with the SEC. INVESTORS ARE URGED TO READ THE FORM S-4, PROXY STATEMENT AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC BECAUSE THEY CONTAIN IMPORTANT INFORMATION REGARDING THE MERGER. Investors may obtain free copies of the Form S-4, proxy statement and the other documents at the website maintained by the SEC at www.sec.gov. In addition, you may obtain documents filed with the SEC by ConocoPhillips free of charge by contacting ConocoPhillips Shareholder Relations Department at (281) 293-6800, P.O. Box 2197, Houston, Texas, 77079-2197. You may obtain documents filed with the SEC by Burlington Resources free of charge by contacting Burlington Resources Investor Relations Department at (800) 262-3456, 717 Texas Avenue, Suite 2100, Houston, Texas 77002, e-mail: IR@br-inc.com. INTEREST OF CERTAIN PERSONS IN THE MERGER ConocoPhillips, Burlington Resources and their respective directors and executive officers, may be deemed to be participants in the solicitation of proxies from Burlington Resources' stockholders in connection with the merger. Information about the directors and executive officers of ConocoPhillips and their ownership of ConocoPhillips stock will be set forth in the proxy statement for ConocoPhillips' 2006 Annual Meeting of Stockholders. Information about the directors and executive officers of Burlington Resources and their ownership of Burlington Resources stock is set forth in Burlington Resources' proxy statement, which was filed with the SEC on February 27, 2006. Investors may obtain additional information regarding the interests of such participants by reading the Form S-4 and proxy statement for the merger. Investors should read the Form S-4 and proxy statement carefully before making any voting or investment decision. --------------------------------------------------------------------------------