As of the latest Form 4 filed Jul 1, 2026.
What Cogent Communications Group Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 28 most recent filings for CCOI.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-01 | 2026-06-30 | Howard Eve N Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-07-01 | 2026-06-30 | Howell Deneen C Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-07-01 | 2026-06-30 | de Sa Paul Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-07-01 | 2026-06-30 | BROOKS STEVEN D Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-30 | 2026-06-30 | Kennedy Sheryl Lynn Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-30 | 2026-06-30 | Montagner Marc Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-30 | 2026-06-30 | FERGUSON Lewis H Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-16 | 2026-06-16 | WEED THADDEUS GERARD VICE PRESIDENT, CFO | SSale | −4.85K | $16.79 | $81.4K | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-15 | KILMER HENRY W VP OF NETWORK STRATEGY | SSale | −2.40K | $17.01 | $40.8K | No | Form 4 ↗ |
| 2026-05-28 | 2026-05-28 | FERGUSON Lewis H Director | SSale | −2.80K | $20.36 | $57.0K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Kennedy Sheryl Lynn Director | SSale | −3.30K | $16.22 | $53.5K | No | Form 4 ↗ |
| 2026-05-04 | 2026-05-04 | SCHAEFFER DAVE CHAIRMAN, CEO, AND PRESIDENT | GGift | +1.00M | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-04 | 2026-05-04 | SCHAEFFER DAVE, CHAIRMAN, CEO, AND PRESIDENT | GGift | −1.00M | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-04 | 2026-05-04 | SCHAEFFER DAVE, CHAIRMAN, CEO, AND PRESIDENT | AAward | +1.00M | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-02 | 2026-04-01 | SCHAEFFER DAVE CHAIRMAN, CEO, AND PRESIDENT | GGift | +29.3K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-02 | 2026-04-01 | SCHAEFFER DAVE, CHAIRMAN, CEO, AND PRESIDENT | GGift | −29.3K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-02 | 2026-04-01 | SCHAEFFER DAVE, CHAIRMAN, CEO, AND PRESIDENT | DDisposition | −58.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-31 | 2026-03-31 | Howard Eve N Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-31 | 2026-03-31 | Howell Deneen C Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-31 | 2026-03-31 | de Sa Paul Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-31 | 2026-03-31 | Kennedy Sheryl Lynn Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-31 | 2026-03-31 | Montagner Marc Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-31 | 2026-03-31 | FERGUSON Lewis H Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-31 | 2026-03-31 | BROOKS STEVEN D Director | AAward | +3.44K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-06 | KILMER HENRY W VP OF NETWORK STRATEGY | SSale | −2.40K | $23.35 | $56.0K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-05 | Kennedy Sheryl Lynn Director | SSale | −3.30K | $22.99 | $75.9K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-05 | FERGUSON Lewis H Director | SSale | −2.21K | $23.03 | $50.8K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-05 | WEED THADDEUS GERARD VICE PRESIDENT, CFO | SSale | −4.85K | $22.63 | $110K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also CCOI’s full analysis or the market-wide insider trading feed. The tabs above jump to CCOI’s other SEC data.
Source: SEC Form 4 filings for CCOI, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.