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COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS > KEI

DateNameTickerSharesChangeValueChangePrice
09/30/2010KEITHLEY INSTRUMENTS INCKEI208,448208,4484,484,0004,484,000$21.51
06/30/2008KEITHLEY INSTRUMENTS INCKEI0-15,5770-165,000 
12/31/2007KEITHLEY INSTRUMENTS INCKEI0-15,5770-165,000 
09/30/2007KEITHLEY INSTRUMENTS INCKEI15,577-5,023165,000-94,000$10.59
06/30/2007KEITHLEY INSTRUMENTS INCKEI20,600-34,330259,000-581,000$12.57
03/31/2007KEITHLEY INSTRUMENTS INCKEI54,93017,450840,000347,000$15.29
12/31/2006KEITHLEY INSTRUMENTS INCKEI37,48017,080493,000233,000$13.15
09/30/2006KEITHLEY INSTRUMENTS INCKEI20,400-700260,000-9,000$12.75
06/30/2006KEITHLEY INSTRUMENTS INCKEI21,100-7,100269,000-164,000$12.75
03/31/2006KEITHLEY INSTRUMENTS INCKEI28,200-1,700433,00015,000$15.35
12/30/2005KEITHLEY INSTRUMENTS INCKEI29,900-100418,000-20,000$13.98
09/30/2005KEITHLEY INSTRUMENTS INCKEI30,000-32,200438,000-521,000$14.60
06/30/2005KEITHLEY INSTRUMENTS INCKEI62,200-80,490959,000-1,343,000$15.42
03/31/2005KEITHLEY INSTRUMENTS INCKEI142,69028,3902,302,00050,000$16.13
12/31/2004KEITHLEY INSTRUMENTS INCKEI114,300-7,0002,252,000135,000$19.70
09/30/2004KEITHLEY INSTRUMENTS INCKEI121,3003002,117,000-563,000$17.45
06/30/2004KEITHLEY INSTRUMENTS INCKEI121,0005002,680,000184,000$22.15
03/31/2004KEITHLEY INSTRUMENTS INCKEI120,5008,7002,496,000450,000$20.71
12/31/2003KEITHLEY INSTRUMENTS INCKEI111,800-5002,046,000457,000$18.30
09/30/2003KEITHLEY INSTRUMENTS INCKEI112,300-9,8001,589,000-175,000$14.15
06/30/2003KEITHLEY INSTRUMENTS INCKEI122,100-3001,764,000441,000$14.45
03/31/2003KEITHLEY INSTRUMENTS INCKEI122,400-18,5001,323,000-438,000$10.81
12/31/2002KEITHLEY INSTRUMENTS INCKEI140,90034,4001,761,000467,000$12.50
09/30/2002KEITHLEY INSTRUMENTS INCKEI106,50018,1001,294,00018,000$12.15
06/30/2002KEITHLEY INSTRUMENTS INCKEI88,400-4,4001,276,000-763,000$14.43
03/31/2002KEITHLEY INSTRUMENTS INCKEI92,80010,1002,039,000641,000$21.97
12/31/2001KEITHLEY INSTRUMENTS INCKEI82,7005,3001,398,000287,000$16.90
09/30/2001KEITHLEY INSTRUMENTS INCKEI77,4001,6001,111,000-504,000$14.35
06/30/2001KEITHLEY INSTRUMENTS INCKEI75,800-35,4501,615,000-187,000$21.31
03/31/2001KEITHLEY INSTRUMENTS INCKEI111,250-41,1001,802,000-4,759,000$16.20
12/31/2000KEITHLEY INSTRUMENTS INCKEI152,350116,1006,561,0004,023,000$43.07
09/30/2000KEITHLEY INSTRUMENTS INCKEI36,25010,6002,538,000303,000$70.01
06/30/2000KEITHLEY INSTRUMENTS INCKEI25,65025,6502,235,0002,235,000$87.13
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