Insider Stock Trading History of Schleifer Mark A


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 Schleifer Mark A since year 2005. The trader's CIK number is 1166940. At the time of this reporting, Schleifer Mark A is the VP of IP Engineering of Cogent Communications Group Inc . (stock ticker symbol COI). See this page for all insider trading activities at Cogent Communications Group Inc .


Stock purchases, sales, and option exercises reported by insider Schleifer Mark A since 2005.
  Trade Date   Symbol Company Name (Issuer) Trade Type     Shares       Price ($)   Value ($)
2011-12-02 CCOI Cogent Communications Group Inc Option Ex 3,125 4.88 15,250
2011-12-02 CCOI Cogent Communications Group Inc Sale 3,125 16.58 51,812
2011-10-17 CCOI Cogent Communications Group Inc Sale 3,000 14.90 44,709
2011-10-03 CCOI Cogent Communications Group Inc Sale 1,250 13.27 16,590
2011-07-15 CCOI Cogent Communications Group Inc Sale 3,000 16.69 50,076
2011-07-01 CCOI Cogent Communications Group Inc Sale 1,250 16.83 21,042
2011-04-15 CCOI Cogent Communications Group Inc Sale 17,040 12.92 220,139
2011-04-01 CCOI Cogent Communications Group Inc Sale 1,250 14.32 17,900
2011-01-04 CCOI Cogent Communications Group Inc Sale 1,250 14.24 17,800
2010-10-13 CCOI Cogent Communications Group Inc Sale 1,250 10.00 12,500
2010-10-11 CCOI Cogent Communications Group Inc Sale 1,250 10.00 12,500
2010-04-01 CCOI Cogent Communications Group Inc Sale 1,250 10.43 13,037
2010-03-03 CCOI Cogent Communications Group Inc Sale 1,250 10.52 13,154
2009-10-09 CCOI Cogent Communications Group Inc Sale 10,000 12.46 124,629
2009-07-01 CCOI Cogent Communications Group Inc Sale 1,250 8.22 10,273
2009-04-30 CCOI Cogent Communications Group Inc Sale 20,000 8.63 172,600
2009-04-02 CCOI Cogent Communications Group Inc Sale 1,250 8.20 10,256
2009-01-02 CCOI Cogent Communications Group Inc Sale 5,000 6.48 32,395
2008-06-20 CCOI Cogent Communications Group Inc Option Ex 599 .00 0
2008-06-20 CCOI Cogent Communications Group Inc Sale 599 14.89 8,919
2008-06-06 CCOI Cogent Communications Group Inc Option Ex 1,250 4.88 6,100
2008-06-06 CCOI Cogent Communications Group Inc Sale 1,250 14.64 18,301
2008-03-20 CCOI Cogent Communications Group Inc Option Ex 600 .00 0
2008-03-20 CCOI Cogent Communications Group Inc Sale 600 18.64 11,184
2007-12-20 CCOI Cogent Communications Group Inc Option Ex 600 .00 0
2007-12-20 CCOI Cogent Communications Group Inc Sale 600 22.80 13,681
2007-12-13 CCOI Cogent Communications Group Inc Option Ex 841 2.44 2,052
2007-12-13 CCOI Cogent Communications Group Inc Sale 841 21.96 18,469
2007-09-20 CCOI Cogent Communications Group Inc Sale 600 25.24 15,144
2007-09-20 CCOI Cogent Communications Group Inc Option Ex 600 .00 0
2007-08-20 CCOI Cogent Communications Group Inc Option Ex 625 4.88 3,050
2007-08-20 CCOI Cogent Communications Group Inc Sale 625 24.78 15,486
2007-06-21 CCOI Cogent Communications Group Inc Sale 600 29.29 17,574
2007-06-21 CCOI Cogent Communications Group Inc Option Ex 600 .00 0
2007-06-08 CCOI Cogent Communications Group Inc Option Ex 625 4.88 3,050
2007-06-08 CCOI Cogent Communications Group Inc Sale 625 25.77 16,106
2007-03-20 CCOI Cogent Communications Group Inc Option Ex 4,350 2.44 10,614
2007-03-20 CCOI Cogent Communications Group Inc Sale 4,350 23.54 102,399
2006-12-20 CCOI Cogent Communications Group Inc Option Ex 600 .00 0
2006-12-20 CCOI Cogent Communications Group Inc Sale 600 15.55 9,330
2006-09-26 CCOI Cogent Communications Group Inc Sale 600 10.57 6,342
2006-09-25 CCOI Cogent Communications Group Inc Sale 1,691 10.57 17,873
2006-09-25 CCOI Cogent Communications Group Inc Option Ex 600 .00 0
2006-03-20 CCOI Cogent Communications Group Inc Sale 5,400 9.11 49,204
2005-12-08 COI Cogent Communications Group Inc Sale 19,481 5.82 113,476

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 Schleifer Mark A (VP of IP Engineering of Cogent Communications Group Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.