Cogent Communications Group Inc
Ownership
Ownership Structure
Who owns Cogent Communications Group Inc (CCOI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 82.1% of the shares are freely tradable; institutional investors hold 102.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 13.81 | 7,075,372 | -1.6 | 03/31/2026 |
| Turtle Creek Asset Management Inc. | 8.49 | 4,348,897 | +7.7 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.37 | 2,748,759 | +0.0 | 03/31/2026 |
| EdgePoint Investment | 4.46 | 2,283,378 | +0.0 | 06/30/2026 |
| State Street Corp | 4.44 | 2,273,265 | +9.8 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.14 | 2,120,531 | +0.0 | 03/31/2026 |
| Park West Asset Management LLC | 3.78 | 1,935,201 | +37.3 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.68 | 2,907,396 | +0.0 | 08/31/2026 |
| EdgePoint Global Growth and Income | 3.74 | 1,917,054 | +0.0 | 12/31/2025 |
| EdgePoint Global Growth & Inc Port Sr F | 3.74 | 1,917,054 | +0.0 | 12/31/2025 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Weed Thaddeus Gerard | VICE PRESIDENT, CFO | 193,050 | 1,737,450 $ | Sep 2, 2026 | direct |
| Kilmer Henry W | VP OF NETWORK STRATEGY | 36,200 | 325,800 $ | Sep 15, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 15, 2026 | Kilmer Henry W | VP OF NETWORK STRATEGY | Sell | 2,400 | 9.21 | 22,104 |
| Sep 2, 2026 | Weed Thaddeus Gerard | VICE PRESIDENT, CFO | Sell | 4,850 | 9.37 | 45,445 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.