X0202 4 2005-08-09 0 0000319201 KLA TENCOR CORP KLAC 0000923960 ELKUS RICHARD J JR C/O KLA-TENCOR CORPORATION 160 RIO ROBLES SAN JOSE CA 95130 1 0 0 0 Common Stock 2005-08-09 4 M 0 2500 40.68 A 67500 D Common Stock 2005-08-09 4 S 0 2500 49.36 D 65000 D Common Stock 2005-08-09 4 M 0 2500 44.76 A 67500 D Common Stock 2005-08-09 4 S 0 2500 49.36 D 65000 D Common Stock 2005-08-09 4 M 0 2400 40.24 A 67400 D Common Stock 2005-08-09 4 S 0 2400 49.34 D 65000 D Common Stock 2005-08-09 4 M 0 100 40.24 A 65100 D Common Stock 2005-08-09 4 S 0 100 49.36 D 65000 D Non-Qualified Stock Option (right to buy) 40.24 2005-08-09 4 M 0 2400 49.34 D 2005-05-11 2015-05-11 Common Stock 2400 100 D Non-Qualified Stock Option (right to buy) 40.24 2005-08-09 4 M 0 100 49.36 D 2005-05-11 2015-05-11 Common Stock 100 0 D Non-Qualified Stock Option (right to buy) 40.68 2005-08-09 4 M 0 2500 49.36 D 2004-10-18 2014-10-18 Common Stock 2500 0 D Non-Qualified Stock Option (right to buy) 44.76 2005-08-09 4 M 0 2500 49.36 D 2005-01-25 2015-01-25 Common Stock 2500 0 D Non-Qualified Stock Option (right to buy) 51.35 2005-08-02 2012-08-02 Common Stock 2500 2500 D Non-Qualified Stock Option (right to buy) 59.44 2003-11-05 2013-11-05 Common Stock 10000 10000 D Due to an administrative error the transactions have been reported late. Option expiration date was reported incorrectly on the original Form 4. By: Stuart Nichols For: Richard J. Elkus, Jr. 2005-09-06