COGENT COMMUNICATIONS HOLDINGS, INC. Insider Trading Activity
Every SEC Form 4 insider transaction reported for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are CCOI insiders buying or selling?
In the last 12 months, COGENT COMMUNICATIONS HOLDINGS, INC. insiders reported 1 open-market purchase ($0) and 13 sales ($885.7K) — net selling of $885.7K. Since March 2018, Trabud has recorded 319 Form 4 filings for CCOI: 4 buys ($1.1M) and 315 sells ($231.8M).
Source: SEC EDGAR Form 4
What stands out
- The most recent open-market purchase was reported on Dec 2, 2025 (10 months ago).
Key Statistics (March 2018 – Sep 15, 2026)
Total Form 4 filings
319
SEC EDGAR
Insider filers
18
Insider buys (4)
$1.1M
Insider sells (315)
$231.8M
Insider sentiment
Net sellingNet insider flow of $230.7M in net selling since March 2018, and $885.7K in net selling over the last 12 months.
Recent CCOI insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 15, 2026 | Henry W Kilmer | VP OF NETWORK STRATEGY | Sale | 2.4K | $9.21 | $22.1K | SEC ↗ |
| Sep 3, 2026 | Thaddeus Gerard Weed | VICE PRESIDENT, CFO | Sale | 4.8K | $9.37 | $45.4K | SEC ↗ |
| Jun 16, 2026 | Thaddeus Gerard Weed | VICE PRESIDENT, CFO | Sale | 4.8K | $16.79 | $81.4K | SEC ↗ |
| Jun 15, 2026 | Henry W Kilmer | VP OF NETWORK STRATEGY | Sale | 2.4K | $17.01 | $40.8K | SEC ↗ |
| May 28, 2026 | Lewis H Ferguson | Director | Sale | 2.8K | $20.36 | $57.0K | SEC ↗ |
| May 18, 2026 | Sheryl Lynn Kennedy | Director | Sale | 3.3K | $16.22 | $53.5K | SEC ↗ |
| Mar 9, 2026 | Henry W Kilmer | VP OF NETWORK STRATEGY | Sale | 2.4K | $23.35 | $56.0K | SEC ↗ |
| Mar 5, 2026 | Lewis H Ferguson | Director | Sale | 2.2K | $23.03 | $50.8K | SEC ↗ |
| Mar 5, 2026 | Sheryl Lynn Kennedy | Director | Sale | 3.3K | $22.99 | $75.9K | SEC ↗ |
| Dec 12, 2025 | Thaddeus Gerard Weed | VICE PRESIDENT, CFO | Sale | 7.3K | $23.99 | $175.1K | SEC ↗ |
| Dec 8, 2025 | Henry W Kilmer | VP OF NETWORK STRATEGY | Sale | 4.8K | $19.79 | $95.0K | SEC ↗ |
| Dec 3, 2025 | Lewis H Ferguson | Director | Sale | 4.0K | $20.34 | $81.3K | SEC ↗ |
| Dec 2, 2025 | Henry W Kilmer | VP OF NETWORK STRATEGY | Purchase | 2.4K | $0.00 | $0 | SEC ↗ |
| Nov 12, 2025 | Sheryl Lynn Kennedy | Director | Sale | 2.4K | $21.34 | $51.2K | SEC ↗ |
| Sep 5, 2025 | Henry W Kilmer | VP OF NETWORK STRATEGY | Sale | 2.4K | $36.99 | $88.8K | SEC ↗ |
| Sep 2, 2025 | Thaddeus Gerard Weed | VICE PRESIDENT, CFO | Sale | 4.9K | $36.98 | $181.2K | SEC ↗ |
| Aug 21, 2025 | Sheryl Lynn Kennedy | Director | Sale | 2.0K | $36.35 | $72.7K | SEC ↗ |
| Aug 11, 2025 | Dave Schaeffer | CHAIRMAN, CEO, AND PRESIDENT | Sale | 818.9K | $27.50 | $22.5M | SEC ↗ |
| Aug 8, 2025 | Dave Schaeffer | CHAIRMAN, CEO, AND PRESIDENT | Sale | 1.8M | $32.60 | $60.0M | SEC ↗ |
| Jun 16, 2025 | Dave Schaeffer | CHAIRMAN, CEO, AND PRESIDENT | Sale | 70.0K | $47.11 | $3.3M | SEC ↗ |
| Jun 16, 2025 | Dave Schaeffer | CHAIRMAN, CEO, AND PRESIDENT | Sale | 55.0K | $47.40 | $2.6M | SEC ↗ |
| Jun 12, 2025 | Dave Schaeffer | CHAIRMAN, CEO, AND PRESIDENT | Sale | 55.0K | $47.86 | $2.6M | SEC ↗ |
| Jun 12, 2025 | Dave Schaeffer | CHAIRMAN, CEO, AND PRESIDENT | Sale | 55.0K | $48.51 | $2.7M | SEC ↗ |
| Jun 10, 2025 | Dave Schaeffer | CHAIRMAN, CEO, AND PRESIDENT | Sale | 55.0K | $48.68 | $2.7M | SEC ↗ |
| Jun 9, 2025 | Dave Schaeffer | CHAIRMAN, CEO, AND PRESIDENT | Sale | 55.0K | $48.64 | $2.7M | SEC ↗ |
Showing the 25 most recent of 319 Form 4 filings for COGENT COMMUNICATIONS HOLDINGS, INC..
Most active CCOI insiders
- Dave Schaeffer47 filings
- Henry W Kilmer40 filings
- James Bubeck36 filings
- Thaddeus Gerard Weed33 filings
- Lewis H Ferguson29 filings
Ask anything about CCOI insider activity
Use Trabud's AI agent to query COGENT COMMUNICATIONS HOLDINGS, INC.'s Form 4 history in plain English — "Show me CCOI CEO purchases this year" or compare it against any other ticker.
Open the AI agentCCOI insider trading FAQ
Are COGENT COMMUNICATIONS HOLDINGS, INC. insiders buying or selling?
In the last 12 months, COGENT COMMUNICATIONS HOLDINGS, INC. insiders reported 1 open-market purchase ($0) and 13 sales ($885.7K) — net selling of $885.7K. Since March 2018, Trabud has recorded 319 Form 4 filings for CCOI: 4 buys ($1.1M) and 315 sells ($231.8M). Over the full record that is net selling of $230.7M.
How many insiders trade CCOI stock?
18 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for COGENT COMMUNICATIONS HOLDINGS, INC.. The most recent filing was accepted on Sep 15, 2026.
Where does Trabud get CCOI insider trading data?
All CCOI insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.