Mark Andrew Harris - 31 Dec 2025 Form 4 Insider Report for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI)

Reporting relationship: VP & Chief Revenue Officer
Issuer ticker: CCOI
Reported as of: 31 Dec 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Jan 2026, 16:27:17 UTC
Prior SEC filing: 03 Sep 2025
Source filing: View source filing
Reporting owner signature: /s/ Mark Andrew Harris

Key filing fact

Mark Andrew Harris filed Form 4 for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) on 05 Jan 2026.

Key facts

This page summarizes Mark Andrew Harris'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, 16:27.

Change

Previous filing in this sequence was filed on 03 Sep 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

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002083050 Primary reporting owner

Harris Mark Andrew

Relationship: VP & Chief Revenue Officer
Address: 2450 N ST NW, WASHINGTON
Signature: /s/ Mark Andrew Harris
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: +5,000
Change %: +97%
Price: $0.000000
Shares after: 10,168
Date: 31 Dec 2025
Ownership: Direct
Footnotes: F1

CCOI transaction

common stock

Award

Transaction value: $0
Shares: +100,000
Change %: +983%
Price: $0.000000
Shares after: 110,168
Date: 31 Dec 2025
Ownership: Direct
Footnotes: F2

^* 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

This 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. Harris' continued employment to that date.

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