X0202 4 2006-02-28 0 0001097313 GRANT PRIDECO INC GRP 0001241701 CHOYCE PHILIP A 400 N. SAM HOUSTON PKWY EAST SUITE 900 HOUSTON TX 77060 0 1 0 0 VP & General Counsel Phantom Stock Units 2006-02-28 4 A 0 1435.6102 44.23 A Common Stock 1435.6102 25676.2847 D Represents units credited to the participants account pursuant to the terms of the Companys Executive Deferred Compensation Plan. All phantom stock units credited under the Plan with respect to deferrals of compensation by participants are 100% vested at all times. All units credited under the Plan with respect to the Company's 7.5% allocation and matching allocation vest at 20% per year for each year of service with the Company. Distributions under the Plan are made upon termination of employment, retirement or death of the participant. Units are allocated at month-end based upon the fair market value of the common stock at month end. Philip A. Choyce 2006-03-01