Cogent VP Kilmer sells $22K in CCOI stock

COGENT COMMUNICATIONS HOLDINGS, INC.

Rhea-AI Filing Summary

COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) officer Henry W. Kilmer, VP of Network Strategy, reported selling 2,400 shares of common stock on September 15, 2026 at $9.21 per share in a sale described as an open market or private transaction. After this sale, he directly holds 36,200 shares of CCOI common stock. No Rule 10b5-1 trading plan is reported for this transaction.

Insider Trade Summary

Net Seller: 2,400 shares

Net Sell 1 txn

Insider KILMER HENRY W

Role VP OF NETWORK STRATEGY

Sold 2,400 shs ($22K)

Type	Security	Shares	Price	Value
Sale	common stock	2,400	$9.21	$22K

Holdings After Transaction: common stock — 36,200 shares (Direct)

Key Figures

Shares sold: 2,400 shares Sale price per share: $9.21 per share Transaction value: $22,104 +1 more

4 metrics

Shares sold 2,400 shares Common stock sale reported for September 15, 2026

Sale price per share $9.21 per share Price for the 2,400 CCOI shares sold on September 15, 2026

Transaction value $22,104 2,400 shares sold at $9.21 per share

Shares held after transaction 36,200 shares Direct holdings of Henry W. Kilmer after the reported sale

Key Terms

common stock, open market or private transaction, directly holds

3 terms

common stock financial

"reported selling 2,400 shares of common stock on September 15, 2026"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

open market or private transaction financial

"sale in an open market or private transaction"

directly holds financial

"After this sale, he directly holds 36,200 shares"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

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

CCOI reported that Henry W. Kilmer, VP of Network Strategy, sold 2,400 shares of common stock on September 15, 2026 in a sale described as an open market or private transaction.

At what price were Henry W. Kilmer’s CCOI shares sold?

Henry W. Kilmer’s 2,400 CCOI shares were sold at a price of $9.21 per share in the reported September 15, 2026 transaction.

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

After the reported sale, Henry W. Kilmer directly holds 36,200 shares of CCOI common stock, according to the Form 4 disclosure.

Was Henry W. Kilmer’s CCOI stock sale under a Rule 10b5-1 plan?

No. The filing indicates the Rule 10b5-1 checkbox is not marked, so the reported 2,400-share CCOI stock sale was not affirmed as being made under a Rule 10b5-1 trading plan.

What role does Henry W. Kilmer hold at CCOI?

Henry W. Kilmer is identified as an officer of CCOI, serving as VP of Network Strategy, in the Form 4 reporting his September 15, 2026 stock sale.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/15/2026 - 05:50 PM Accepted by SEC EDGAR 09/15/2026 - 05:50 PM Learn about SEC filing dates

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 DISTRICT OF COLUMBIA 20037

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

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

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

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

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	09/15/2026		S		2,400	D	$9.21	36,200	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	09/15/2026
	** 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.
* Form 4: SEC 1474 (03-26)