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Keithley Instruments Inc (KEI)

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Insider Trading: Purchases

Insider	Price	Amount	Relationship	Remaining Holdings	Date	Form 4
Keithley	$4.51	200	Large Shareholder, Officer, Director	129,593	2009-12-29	Filing
Keithley	$4.50	200	Large Shareholder, Officer, Director	129,393	2009-12-29	Filing
Keithley	$4.46	500	Large Shareholder, Officer, Director	129,193	2009-12-28	Filing
Keithley	$4.45	500	Large Shareholder, Officer, Director	128,693	2009-12-28	Filing
Keithley	$4.25	500	Large Shareholder, Officer, Director	128,193	2009-12-22	Filing
Keithley	$4.30	806	Large Shareholder, Officer, Director	127,693	2009-12-22	Filing
Keithley	$4.35	500	Large Shareholder, Officer, Director	126,887	2009-12-21	Filing
Keithley	$4.33	400	Large Shareholder, Officer, Director	126,387	2009-12-21	Filing
Keithley	$4.30	100	Large Shareholder, Officer, Director	125,987	2009-12-21	Filing
Keithley	$4.22	12	Large Shareholder, Officer, Director	125,887	2009-12-15	Filing
Keithley	$4.20	800	Large Shareholder, Officer, Director	125,875	2009-12-15	Filing
Keithley	$4.15	500	Large Shareholder, Officer, Director	125,075	2009-12-15	Filing
Keithley	$4.46	500	Large Shareholder, Officer, Director	124,575	2009-12-14	Filing
Keithley	$4.43	500	Large Shareholder, Officer, Director	124,075	2009-12-14	Filing
Griswold	$4.33	4,000	Director	20,000	2009-12-08	Filing
Griswold	$4.33	6,000	Director	16,000	2009-12-07	Filing
Keithley	$5.15	500	Large Shareholder, Officer, Director	122,267	2009-09-15	Filing
Keithley	$4.70	500	Large Shareholder, Officer, Director	121,767	2009-09-14	Filing
Keithley	$4.83	85	Large Shareholder, Officer, Director	121,267	2009-09-10	Filing
Keithley	$4.80	200	Large Shareholder, Officer, Director	121,182	2009-09-10	Filing