HOERSTEN MARK A [Rocket]

Date	Name	Symbol	Type	Security	Shares	Price	Value	Reported
10/27/2010	KEITHLEY INSTRUMENTS INC	KEI	Payment of Exercise	Common Shares	1.8k	$21.53	$39.2k	10/27/2010
10/27/2010	KEITHLEY INSTRUMENTS INC	KEI	Exercise	Performance Award Unit	5.7k	$0.00	$0	10/27/2010
10/05/2010	KEITHLEY INSTRUMENTS INC	KEI	Other (acquisition)	Common Shares	7	$21.45	$150.1	10/27/2010
07/06/2010	KEITHLEY INSTRUMENTS INC	KEI	Other (acquisition)	Common Shares	18	$8.98	$161.6	10/27/2010
04/06/2010	KEITHLEY INSTRUMENTS INC	KEI	Other (acquisition)	Common Shares	7	$6.59	$46.1	10/27/2010
01/06/2010	KEITHLEY INSTRUMENTS INC	KEI	Other (acquisition)	Common Shares	10	$4.55	$45.5	10/27/2010