X0303 4 2008-08-14 0 0000060849 LUFKIN INDUSTRIES INC LUFK 0001185411 SMITH DOUGLAS V P. O. BOX 849 LUFKIN TX 75902 1 0 0 0 Common Stock 2008-08-14 4 M 0 101 63.80 A 39263 D Common Stock 2008-08-14 4 S 0 101 93.94 D 39162 D Common Stock 2008-08-15 4 M 0 2899 63.80 A 42061 D Common Stock 2008-08-15 4 S 0 2899 94 D 39162 D Option to Purchase Common Stock 63.80 2008-08-14 4 M 0 101 63.80 D 2006-02-08 2016-02-07 Common Stock 101 87399 D Option to Purchase Common Stock 63.80 2008-08-15 4 M 0 2899 63.80 D 2006-02-08 2016-02-07 Common Stock 2899 84500 D Douglas V. Smith 2008-08-18