| 2013-05-01 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 2,000 0.0044% | $28.25 | $56,490 | +26.03% | |
| 2013-04-16 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 1,200 0.0026% | $28.30 | $33,955 | +19.98% | |
| 2013-03-13 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 9,000 0.0197% | $25.61 | $230,521 | +26.32% | |
| 2013-03-07 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 10,000 0.0218% | $25.50 | $255,000 | +26.03% | |
| 2012-12-10 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 3,000 0.0065% | $22.00 | $66,000 | +29.9% | |
| 2012-11-20 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 3,000 0.0065% | $21.11 | $63,317 | +32.92% | |
| 2012-10-15 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 1,500 0.0032% | $21.09 | $31,630 | +29.62% | |
| 2012-08-13 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 4,000 0.0088% | $19.36 | $77,440 | +30.36% | |
| 2012-07-16 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 1,500 0.0033% | $19.37 | $29,052 | +24.89% | |
| 2012-05-07 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 3,000 0.0066% | $18.50 | $55,503 | +18.48% | |
| 2012-04-16 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 1,500 0.0033% | $18.62 | $27,926 | +15.14% | |
| 2012-03-09 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 1,500 0.0033% | $18.56 | $27,840 | +10.45% | |
| 2012-02-28 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 3,000 0.0066% | $18.56 | $55,691 | +8.12% | |
| 2012-01-17 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 1,500 0.0032% | $18.24 | $27,355 | +3.01% | |
| 2012-01-03 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 500 0.0011% | $17.04 | $8,521 | +13.25% | |
| 2011-10-17 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 1,500 0.0033% | $14.87 | $22,302 | +24.06% | |
| 2011-10-03 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 500 0.0012% | $13.35 | $6,677 | +42.56% | |
| 2011-07-15 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 1,500 0.0033% | $16.63 | $24,942 | +0.54% | |
| 2011-07-01 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 500 0.0011% | $17.07 | $8,535 | -1.17% | |
| 2011-05-13 | Sale | Cogent Communications Holdings, Inc. CCOI | VP Sales & CRO | 4,000 0.009% | $14.62 | $58,480 | +12.54% |