X0202 4 2006-03-31 1 0000833320 BURLINGTON RESOURCES INC BR 0001330557 Whitehead Dane E BURLINGTON RESOURCES INC. 717 TEXAS AVENUE, SUITE 2100 HOUSTON TX 77002 0 1 0 0 V.P. and Controller Common Stock 2006-03-31 4 D 0 2886 D 0 D Common Stock 2006-03-31 4 D 0 50 D 0 I By Wife Phantom Stock 2006-03-31 4 D 0 10153 D Common Stock 10153 0 D Performance Share Units 2006-03-31 4 D 0 15000 D Common Stock 15000 0 D Stock Option (right to buy) 44.215 2006-03-31 4 D 0 8000 0 D 2015-01-26 Common Stock 25000 0 D Stock Option (right to buy) 90.87 2006-03-31 4 D 0 6500 0 D 2016-01-25 Common Stock 6500 0 D Phantom Stock 2006-03-31 4 D 0 7250 D 2006-03-31 2006-03-31 Common Stock 7250 0 D 636 of the shares of common stock listed in Table I were cancelled at the effective time of the merger (the "Effective Time") contemplated by the Agreement and Plan of Merger, dated December 12, 2005, to which the Issuer and ConocoPhillips are parties (the "Merger Agreement"), and, in consideration of such cancellation, the Reporting Person became entitled to receive, for each such share of Issuer common stock, 0.7214 shares of ConocoPhillips common stock and $46.50. The remaining 2,250 of the shares of common stock listed in Table I were converted at the Effective Time into 3,245 shares of ConocoPhillips common stock. The shares of common stock listed in Table I were cancelled at the effective time of the merger (the "Effective Time") contemplated by the Agreement and Plan of Merger, dated December 12, 2005, to which the Issuer and ConocoPhillips are parties (the "Merger Agreement"), and, in consideration of such cancellation, the Reporting Person became entitled to receive, for each such share of Issuer common stock, 0.7214 shares of ConocoPhillips common stock and $46.50. These shares of common stock are owned by the Reporting Person's wife. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. 1 for 1. Pursuant to the Merger Agreement, at the Effective Time, these phantom stock units ceased to be measured by the value of Issuer common stock and were converted into 14,646 phantom stock units measured by the value of ConocoPhillips common stock. These phantom stock units were acquired under the Company's deferred compensation plan, are fully vested, and are to be settled in cash upon retirement or other termination of employment. 1 for 1. These units were granted under the Issuer's 2005 Performance Share Unit Plan. At the Effective Time, the Reporting Person became vested in, and entitled to a cash payment with respect to, 1,228 performance stock units in accordance with the provisions of the plan and the Merger Agreement, and the remaining unvested performance stock units were forfeited at that time. Pursuant to the Merger Agreement, at the Effective Time, this option, which provided for vesting in two equal annual installments following the date of grant (January 26, 2005), ceased to represent a right to acquire shares of common stock of the Issuer and thereafter constituted a fully vested option to purchase 11,540 shares of ConocoPhillips common stock with an exercise price of $30.6506 per share. With the respect to 2,200 of the 8,000 shares underlying this option, the expiration date is January 25, 2015. Pursuant to the Merger Agreement, at the Effective Time, this option, which provided for vesting in two equal annual installments following the date of grant (January 25, 2006), ceased to represent a right to acquire shares of common stock of the Issuer and thereafter constituted an option to purchase 9,376 shares of ConocoPhillips common stock with an exercise price of $62.9925 per share. With the respect to 1,100 of the 6,500 shares underlying this option, the expiration date is January 24, 2016. 1 for 1. Pursuant to the Merger Agreement, at the Effective Time, these phantom stock units were cancelled, and the Reporting Person became entitled to receive, for each such phantom stock unit, $92.205. These phantom stock units were granted in lieu of restricted stock and $46.50. Dane E. Whitehead 2006-04-04