Cogent Communications Holdings, Inc.
One of the world's largest Tier 1 internet service providers, Cogent Communications carries high-speed internet traffic, selling data transport and colocation to businesses and other carriers across North America, Europe, and Asia. Founded in 1999 by Dave Schaeffer in Washington, D.C., it grew during the early-2000s telecom downturn by snapping up the fiber networks of more than a dozen struggling rivals at bargain prices. The name "Cogent" means "clear, logical, and convincing."
Granted 1.91M · Sold 4.58M
Granted 242.1K · Sold 97.5K
Granted 105.7K
Granted 35.5K · Bought 20.0K · Sold 10.6K
Granted 227.2K · Sold 22.7K
Granted 21.6K · Sold 4.8K
Granted 33.5K · Sold 8.0K
Granted 58.0K · Sold 38.6K
Granted 62.6K · Sold 62.4K
Granted 30.3K
Granted 9.6K · Sold 975
Granted 27.4K
Granted 35.5K · Sold 24.1K
Granted 27.4K · Sold 3.5K
Granted 16.0K
Granted 1.8K
Granted 35.5K · Sold 26.6K
Granted 20.9K · Sold 24.2K
Granted 9.6K · Sold 9.6K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Schaeffer DaveCHAIRMAN, CEO, AND PRESIDENT, Director · 84 transactions | — | 2.87M | 1.91M | — | 4.58M |
| Weed Thaddeus GerardVICE PRESIDENT, CFO · 32 transactions | +171.7% | 197.9K | 242.1K | — | 97.5K |
| Harris Mark AndrewVP & Chief Revenue Officer · 3 transactions | — | 110.2K | 105.7K | — | — |
| Montagner MarcDirector · 24 transactions | +79.9% | 99.8K | 35.5K | 20.0K | 10.6K |
| Chang John B.VP & CHIEF LEGAL OFFICER · 46 transactions | — | 90.7K | 227.2K | — | 22.7K |
| Kummer Raymond BCTO Emeritus · 5 transactions | +38.9% | 60.0Kas of Jan 2023 | 21.6K | — | 4.8K |
| Brooks Steven DDirector · 23 transactions | +74% | 55.2K | 33.5K | — | 8.0K |
| Bubeck JamesCHIEF REVENUE OFFICER · 29 transactions | +54.5% | 55.1Kas of Jun 2025 | 58.0K | — | 38.6K |
| Kilmer Henry WVP OF NETWORK STRATEGY · 32 transactions | +14.9% | 38.6K | 62.6K | — | 62.4K |
| de Sa PaulDirector · 17 transactions | — | 30.3K | 30.3K | — | — |
| Wallace Sean RobertVP, CFO & Treasurer · 5 transactions | +41.9% | 29.2Kas of Mar 2022 | 9.6K | — | 975 |
| Howell Deneen CDirector · 15 transactions | +1795.3% | 28.9K | 27.4K | — | — |
| FERGUSON Lewis HDirector · 37 transactions | +87.3% | 24.5K | 35.5K | — | 24.1K |
| Howard Eve NDirector · 16 transactions | — | 23.9K | 27.4K | — | 3.5K |
| O'Connor Greg WVP, CHIEF OPERATING OFFICER · 1 transaction | — | 16.0Kas of May 2023 | 16.0K | — | — |
| Katz CarolynDirector · 1 transaction | +12.5% | 15.8Kas of Oct 2021 | 1.8K | — | — |
| Kennedy Sheryl LynnDirector · 36 transactions | +188.2% | 13.7K | 35.5K | — | 26.6K |
| Bath BlakeDirector · 18 transactions | -20.8% | 12.6Kas of Mar 2025 | 20.9K | — | 24.2K |
| Kapp David AllenVP & CHIEF TECHNICAL OFFICER · 4 transactions | — | 6.6Kas of Aug 2023 | 9.6K | — | 9.6K |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 5 years: -4.90M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.