X0202 5 2007-09-30 0 0 0 0000054991 KEITHLEY INSTRUMENTS INC KEI 0001232687 RAE LINDA C KEITHLEY INSTRUMENTS, INC. 28775 AURORA ROAD SOLON OH 44139 0 1 0 0 Sr. VP, General Manager Common Shares 2007-03-30 5 J 0 2 15.1899 A 939 D Common Shares 2007-06-29 5 J 0 3 12.6769 A 942 D Common Shares 2007-06-29 5 J 0 50 11.9225 A 992 D Common Shares 2007-09-28 5 J 0 4 10.5994 A 996 D Common Share Option 2.5313 2000-09-12 2008-09-11 Common Shares 1500 1500 D Common Share Option 4.125 2001-07-17 2009-07-16 Common Shares 5000 5000 D Common Share Option 45.125 2002-08-02 2010-08-01 Common Shares 12000 12000 D Common Share Option 18.41 2003-07-25 2011-07-24 Common Shares 25000 25000 D Common Share Option 13.76 2004-07-24 2012-07-23 Common Shares 30000 30000 D Common Share Option 16.12 2005-08-10 2013-07-18 Common Shares 50000 50000 D Common Share Option 18.75 2005-02-15 2014-07-16 Common Shares 41000 41000 D Common Share Option 15.05 2007-10-04 2015-10-03 Common Shares 25000 25000 D Performance Award Unit 0.00 2008-09-30 2012-02-01 Common Shares 12600 12600 D Common Share Option 14.00 2009-01-30 2017-01-30 Common Shares 25000 25000 D Performance Award Unit 0.00 2009-09-30 2012-02-01 Common Shares 12600 12600 D Acquired through Employee Stock Purchase and Dividend Reinvestment Plan. Option became fully vested on February 15, 2005 Date reported applies to 50% of total, one-half of the balance is then exercisable in each succeeding year Option became fully vested on August 10, 2005 Each Performance Award Unit represents the right to receive one common share at the end of the applicable performance period. The number of units actually earned is subject to adjustment based upon the Company's revenue growth versus that of a defined Peer Group, as well as the Company maintaining an acceptable level of profitability. Minimum number of units is 0 while the maximum number of units is two times the target number shown. Mark J. Plush, Attorney-in Fact 2007-10-26