Thaddeus G. Weed - 31 Dec 2025 Form 4 Insider Report for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI)

Role: VICE PRESIDENT, CFO
Signature: /s/ Thaddeus G. Weed
Issuer symbol: CCOI
Transactions as of: 31 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 05 Jan 2026, 16:34:05 UTC
Previous filing: 12 Dec 2025
Next filing: 05 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
WEED THADDEUS GERARD	VICE PRESIDENT, CFO	2450 N ST NW, 4TH FLOOR, WASHINGTON	/s/ Thaddeus G. Weed	05 Jan 2026	0001166978

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CCOI	common stock	Award	$0	+19,400	+22%	$0.000000	107,600	31 Dec 2025	Direct	F1
transaction	CCOI	common stock	Award	$0	+100,000	+93%	$0.000000	207,600	31 Dec 2025	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The award of restricted stock shall vest in one third of the grant on January 1 of each of 2027, 2028 and 2029.
F2	The award shall vest effective January 1, 2029, based on Mr. Weed's continued employment to that date