X0202 4 2006-11-13 0 0001097313 GRANT PRIDECO INC GRP 0001188799 BUTTERS DAVID J 400 N. SAM HOUSTON PKWY EAST SUITE 900 HOUSTON TX 77060 1 0 0 0 Common stock 2006-11-13 4 G 0 14388 D 89362 D As of 11/13/2006, 14,388 shares of common stock were distributed by the trust to a beneficiary of the trust, and Mr. Butters no longer has indirect beneficial ownership of those shares. Following this disposition, Mr. Butters beneficially owned 89,362 shares as follows: 48,202 shares are owned directly; 14,388 indirectly owned through trust and 26,772 shares owned indirectly by his spouse, for which he disclaims beneficial ownership. Philip A. Choyce, Attorney in Fact 2006-11-13