Cogent (NASDAQ: CCOI) VP Henry Kilmer sells 2,400 shares in open market

Rhea-AI Filing Summary

COGENT COMMUNICATIONS HOLDINGS, INC. vice president of network strategy Henry W. Kilmer reported an open-market sale of 2,400 shares of common stock at $23.35 per share. After this transaction, he continued to hold 41,000 shares of Cogent common stock directly.

Insider Trade Summary

Net Seller: 2,400 shares ($56,040)

Net Sell 1 txn

Insider KILMER HENRY W

Role VP OF NETWORK STRATEGY

Sold 2,400 shs ($56K)

Type	Security	Shares	Price	Value
Sale	common stock	2,400	$23.35	$56K

Holdings After Transaction: common stock — 41,000 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

KILMER HENRY W

(Last) (First) (Middle)

2450 N ST NW

4TH FLOOR

(Street)

WASHINGTON DC 20037

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
COGENT COMMUNICATIONS HOLDINGS, INC. [ CCOI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	VP OF NETWORK STRATEGY

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
common stock	03/06/2026		S		2,400	D	$23.35	41,000	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Hank Kilmer	03/08/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did CCOI executive Henry W. Kilmer report?

Henry W. Kilmer reported selling 2,400 shares of Cogent Communications common stock in an open-market transaction. The sale was reported on a Form 4 insider filing and involved shares he holds directly as an executive of the company.

At what price did Henry W. Kilmer sell CCOI shares?

Henry W. Kilmer sold his Cogent Communications common stock at $23.35 per share. This price reflects the reported transaction value for the 2,400 shares sold in the open market as disclosed in the Form 4 filing.

How many CCOI shares did Henry W. Kilmer sell in this Form 4 filing?

Henry W. Kilmer sold 2,400 shares of Cogent Communications common stock. The transaction was coded as an open-market sale and represents a reduction in his directly held share position, as reported to the SEC.

How many CCOI shares does Henry W. Kilmer hold after the sale?

After selling 2,400 shares, Henry W. Kilmer directly holds 41,000 shares of Cogent Communications common stock. This post-transaction ownership figure is disclosed in the Form 4 and reflects his remaining direct stake.

What is Henry W. Kilmer’s role at Cogent Communications (CCOI)?

Henry W. Kilmer serves as Vice President of Network Strategy at Cogent Communications Holdings, Inc. His position makes him a reporting insider, requiring disclosure of his transactions in company stock on SEC Form 4.

Was the CCOI insider transaction by Henry W. Kilmer a buy or a sell?

The transaction reported by Henry W. Kilmer was a sale of Cogent Communications common stock. It is classified as an open-market sale under transaction code “S,” indicating he disposed of shares rather than acquiring additional stock.