X0202 4 2007-04-23 0 0000060849 LUFKIN INDUSTRIES INC LUFK 0001185407 LESLIE ROBERT D P.O. BOX 849 LUFKIN TX 75902 0 1 0 0 VP/Treasurer/CFO COMMON STOCK 2007-04-23 4 M 0 3550 12.945 A 3550 D COMMON STOCK 2007-04-23 4 M 0 5500 12.155 A 9050 D COMMON STOCK 2007-03-23 4 M 0 3650 18.50 A 12700 D COMMON STOCK 2007-04-23 4 M 0 1875 46.70 A 14575 D COMMON STOCK 2007-04-23 4 S 0 8453 61.60 D 6122 D COMMON STOCK 2007-04-23 4 S 0 2000 62.00 D 4122 D COMMON STOCK 2007-04-23 4 S 0 1521 61.50 D 2601 D COMMON STOCK 2007-04-23 4 S 0 1736 61.70 D 865 D COMMON STOCK 2007-04-23 4 S 0 565 61.77 D 300 D COMMON STOCK 2007-04-23 4 S 0 300 61.75 D 0 D OPTION TO PURCHASE COMMON STOCK 12.945 2007-04-23 4 M 0 3550 12.945 D 2003-11-05 2012-11-04 COMMON STOCK 3550 36950 D OPTION TO PURCHASE COMMON STOCK 12.155 2007-04-23 4 M 0 5500 12.155 D 2004-11-11 2013-11-10 COMMON STOCK 5500 31450 D OPTION TO PURCHASE COMMON STOCK 18.50 2007-04-23 4 M 0 3650 18.50 D 2005-11-09 2014-11-08 COMMON STOCK 3650 27800 D OPTION TO PURCHASE COMMON STOCK 46.70 2007-04-23 4 M 0 1875 46.70 D 2006-11-01 2015-10-31 COMMON STOCK 1875 25925 D Robert D. Leslie 2007-04-25