X0306 4 2012-11-01 0 0000060849 LUFKIN INDUSTRIES INC LUFK 0001468884 Cestero Alejandro P.O. BOX 849 LUFKIN TX 75902 0 1 0 0 VP/General Counsel/Secretary COMMON STOCK 2012-11-01 4 F 0 424 50.47 D 4396 D The shares were withheld by the Issuer in satisfaction of the withholding taxes incurred in connection with the vesting of restricted stock previously awarded to the Reporting Person. The withholding of the shares is an exempt disposition pursuant to Rule 16b-3(e) of the Securities Exchange Act of 1934, as amended. Alejandro Cestero 2012-11-05