| 2011-12-02 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 3,125 0.0069% | $16.58 | $51,813 | +12.31% | |
| 2011-10-17 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 3,000 0.0067% | $14.90 | $44,710 | +24.06% | |
| 2011-10-03 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0029% | $13.27 | $16,590 | +42.56% | |
| 2011-07-15 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 3,000 0.0066% | $16.69 | $50,077 | +0.54% | |
| 2011-07-01 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0027% | $16.83 | $21,043 | -1.17% | |
| 2011-04-15 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 17,040 0.0376% | $12.92 | $220,143 | +20.82% | |
| 2011-04-01 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0027% | $14.32 | $17,900 | +4.91% | |
| 2011-01-04 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0029% | $14.24 | $17,800 | +5.5% | |
| 2010-10-13 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0027% | $10.00 | $12,500 | +37.28% | |
| 2010-10-11 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0028% | $10.00 | $12,500 | +42.73% | |
| 2010-04-01 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0029% | $10.43 | $13,038 | +1.49% | |
| 2010-03-03 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0028% | $10.52 | $13,155 | -3.04% | |
| 2009-10-09 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 10,000 0.0226% | $12.46 | $124,633 | -24.54% | |
| 2009-07-01 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0028% | $8.22 | $10,274 | +22.48% | |
| 2009-04-30 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 20,000 0.0468% | $8.63 | $172,600 | +19.43% | |
| 2009-04-02 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,250 0.0029% | $8.21 | $10,256 | +22.21% | |
| 2009-01-02 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 5,000 0.0114% | $6.48 | $32,395 | +26.62% | |
| 2008-06-20 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,198 0.0027% | $14.89 | $17,838 | -50.38% | |
| 2008-06-06 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 2,500 0.0037% | $9.76 | $24,402 | -51.33% | |
| 2008-03-20 | Sale | Cogent Communications Holdings, Inc. CCOI | VP of IP Engineering | 1,200 0.0025% | $18.64 | $22,368 | -59.51% |