X0202 4 2005-07-26 0 0000060849 LUFKIN INDUSTRIES INC LUFK 0001185394 TROUT H J JR 12335 KINGSRIDE #147 HOUSTON TX 77024 1 0 0 0 COMMON STOCK 2005-07-26 4 M 0 2000 11.285 A 448604 D COMMON STOCK 2005-07-26 4 S 0 2000 47.8501 D 446604 D COMMON STOCK 2005-07-26 4 M 0 1000 10.960 A 447604 D COMMON STOCK 2005-07-26 4 S 0 1000 47.850 D 446604 D OPTION TO PURCHASE COMMON STOCK 11.285 2005-07-26 4 M 0 2000 11.285 D 2001-05-02 2011-05-02 COMMON STOCK 2000 7000 D OPTION TO PURCHASE COMMON STOCK 10.96 2005-07-26 4 M 0 1000 10.96 D 2003-05-07 2013-05-07 COMMON STOCK 1000 6000 D H. J. Trout, Jr. 2005-07-28