Insider Stock Trading History of Slezak Mark


The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Slezak Mark since year 2005. The trader's CIK number is 1165644. At the time of this reporting, Slezak Mark is the Director of Nanosphere Inc . (stock ticker symbol NSPH). See this page for all insider trading activities at Nanosphere Inc .


Stock purchases, sales, and option exercises reported by insider Slezak Mark since 2005.
  Trade Date   Symbol Company Name (Issuer) Trade Type     Shares       Price ($)   Value ($)
2012-07-19 NSPH Nanosphere Inc Buy 1,000,000 2.40 2,400,000
2012-06-14 NSPH Nanosphere Inc Buy 79,329 1.98 157,071
2012-06-15 NSPH Nanosphere Inc Buy 229,746 2.05 470,060
2012-06-12 NSPH Nanosphere Inc Buy 10,000 1.98 19,750
2012-06-13 NSPH Nanosphere Inc Buy 40,000 1.95 78,000
2012-06-11 NSPH Nanosphere Inc Buy 5,000 1.95 9,740
2012-06-08 NSPH Nanosphere Inc Buy 20,000 1.96 39,120
2012-06-06 NSPH Nanosphere Inc Buy 15,000 1.85 27,735
2012-06-07 NSPH Nanosphere Inc Buy 13,116 1.90 24,854
2012-06-05 NSPH Nanosphere Inc Buy 317,500 1.75 554,672
2012-06-04 NSPH Nanosphere Inc Buy 25,000 1.75 43,750
2012-06-01 NSPH Nanosphere Inc Buy 88,900 1.71 152,374
2012-05-31 NSPH Nanosphere Inc Buy 30,000 1.69 50,820
2012-05-29 NSPH Nanosphere Inc Buy 10,000 1.69 16,930
2012-05-24 NSPH Nanosphere Inc Buy 35,000 1.71 59,710
2012-05-25 NSPH Nanosphere Inc Buy 5,505 1.70 9,380
2011-10-14 NSPH Nanosphere Inc Buy 285,235 1.10 314,899
2011-07-07 NSPH Nanosphere Inc Buy 45,000 1.86 83,745
2011-07-08 NSPH Nanosphere Inc Buy 70,000 1.86 130,270
2011-06-28 NSPH Nanosphere Inc Buy 100,000 1.70 169,500
2011-06-27 NSPH Nanosphere Inc Buy 150,000 1.64 246,600
2011-06-24 NSPH Nanosphere Inc Buy 135,000 1.58 212,625
2011-05-10 NSPH Nanosphere Inc Buy 2,700,000 2.20 5,940,000
2009-05-22 NSPH Nanosphere Inc Buy 504,500 3.05 1,538,725
2009-03-16 NSPH Nanosphere Inc Buy 87,658 4.98 436,536
2009-03-12 NSPH Nanosphere Inc Buy 1,500 3.88 5,820
2009-03-13 NSPH Nanosphere Inc Buy 14,398 4.62 66,518
2009-03-11 NSPH Nanosphere Inc Buy 27,164 3.80 103,223
2009-03-10 NSPH Nanosphere Inc Buy 8,857 3.35 29,670
2009-03-06 NSPH Nanosphere Inc Buy 8,530 2.84 24,225
2009-03-09 NSPH Nanosphere Inc Buy 16,657 3.04 50,637
2008-12-11 NSPH Nanosphere Inc Buy 38,294 4.40 168,378
2008-12-12 NSPH Nanosphere Inc Buy 19,958 4.91 98,013
2008-12-10 NSPH Nanosphere Inc Buy 7,040 4.08 28,737
2008-12-09 NSPH Nanosphere Inc Buy 3,188 4.38 13,976
2008-12-04 NSPH Nanosphere Inc Buy 27,534 3.62 99,645
2008-12-05 NSPH Nanosphere Inc Buy 2,368 3.50 8,292
2008-12-02 NSPH Nanosphere Inc Buy 13,460 3.50 47,069

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Slezak Mark (Director of Nanosphere Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.