X0306 4 2012-12-17 0 0000060849 LUFKIN INDUSTRIES INC LUFK 0001468884 Cestero Alejandro P.O. BOX 849 LUFKIN TX 75902 0 1 0 0 VP/General Counsel COMMON STOCK 2012-12-17 4 A 0 4538 0 A 8934 D Shares of restricted stock granted under the ISCP 2000, vesting in one-third increments on 12/17/13, 12/17/14 and 12/17/15. ALEJANDRO CESTERO 2012-12-19