X0202 4/A 2005-12-28 2005-12-29 0 0001097313 GRANT PRIDECO INC GRP 0001241880 LATHAM DAN 400 N. SAM HOUSTON PKWY EAST SUITE 900 HOUSTON TX 77060 0 1 0 0 VP Ind Rel Phantom stock units 2005-12-28 2005-12-28 4 A 0 639 A 639 D Phantom Stock Units 2005-12-28 2005-12-28 4 M 0 639 D Phantom stock units 639 0 D Liquidation of phantom stock units acquired in spinoff of Grant Prideco from Weatherford in April 2000. Philip A. Choyce, Attorney in Fact 2006-01-06