X0303 4 2010-04-26 0 0000060849 LUFKIN INDUSTRIES INC LUFK 0001421541 CREWS MARK E 601 SOUTH RAGUET LUFKIN TX 75904 0 1 0 0 Vice President Common Stock 2010-04-26 4 M 0 7500 55.74 A 7500 D Common Stock 2010-04-26 4 S 0 1200 88.80 D 6300 D Common Stock 2010-04-26 4 S 0 200 88.81 D 6100 D Common Stock 2010-04-26 4 S 0 100 88.82 D 6000 D Common Stock 2010-04-26 4 S 0 100 88.88 D 5900 D Common Stock 2010-04-26 4 S 0 4422 89.00 D 1478 D Common Stock 2010-04-26 4 S 0 300 89.05 D 1178 D Common Stock 2010-04-26 4 S 0 99 89.10 D 1079 D Common Stock 2010-04-26 4 S 0 151 89.16 D 928 D Common Stock 2010-04-26 4 S 0 928 89.25 D 0 D Common Stock 2010-04-26 4 M 0 2500 55.27 A 2500 D Common Stock 2010-04-26 4 S 0 2285 88.78 D 215 D Common Stock 2010-04-26 4 S 0 100 88.79 D 100 D Common Stock 2010-04-26 4 S 0 100 88.855 D 15 D Common Stock 2010-04-26 4 S 0 15 89 D 0 D Option to Purchase Common Stock 55.74 2010-04-26 4 M 0 7500 55.74 D 2009-01-20 2018-01-20 Common Stock 7500 31500 D Option to Purchase Common Stock 55.27 2010-04-26 4 M 0 2500 55.27 D 2009-11-04 2018-11-04 Common Stock 2500 29000 D Mark E. Crews 2010-04-26