Key facts
- This page summarizes John B. Chang's Form 4 filing for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI).
- 2 reported transactions and 0 derivative rows are listed below.
- Accepted by SEC: 05 Jan 2026, 16:26.
John B. Chang - 31 Dec 2025 Form 4 Insider Report for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI)
- Reporting relationship
- VP & CHIEF LEGAL OFFICER
- Issuer ticker
- CCOI
- Reported as of
- 31 Dec 2025
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 05 Jan 2026, 16:26:30 UTC
- Prior SEC filing
- 02 Dec 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ John Chang
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
John B. Chang filed Form 4 for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) on 05 Jan 2026.
Change
- Previous filing in this sequence was filed on 02 Dec 2025.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001775672
Primary reporting owner
Chang John B.
- Relationship
- VP & CHIEF LEGAL OFFICER
- Address
- 2450 N ST NW, 4TH FLOOR, WASHINGTON
- Signature
- /s/ John Chang
- Signature date
- 05 Jan 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
CCOI
transaction
common stock
Award
- Transaction value
- $0
- Shares
- +9,600
- Change %
- +12%
- Price
- $0.000000
- Shares after
- 88,847
- Date
- 31 Dec 2025
- Ownership
- Direct
- Footnotes
- F1
CCOI
transaction
common stock
Award
- Transaction value
- $0
- Shares
- +100,000
- Change %
- +113%
- Price
- $0.000000
- Shares after
- 188,847
- Date
- 31 Dec 2025
- Ownership
- Direct
- Footnotes
- F2
CCOI
holding
common stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,870
- Date
- 31 Dec 2025
- Ownership
- By minor children
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 2 footnotes
Footnote F1
The award of restricted stock shall vest in one third of the grant on January 1 of each of 2027, 2028 and 2029.
Footnote F2
The award shall vest effective January 1, 2029, based on Mr. Chang's continued employment to that date.