Cogent (CCOI) VP Henry Kilmer sells 2,400 shares at $17.01

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 $17.01 per share on June 15, 2026. Following this transaction, he holds 38,600 shares of the company’s stock directly.

Insider Trade Summary

Net Seller: 2,400 shares ($40,824)

Net Sell 1 txn

Insider KILMER HENRY W

Role VP OF NETWORK STRATEGY

Sold 2,400 shs ($41K)

Type	Security	Shares	Price	Value
Sale	common stock	2,400	$17.01	$41K

Holdings After Transaction: common stock — 38,600 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 2,400 shares Sale price: $17.01 per share Shares held after transaction: 38,600 shares +1 more

4 metrics

Shares sold 2,400 shares Open-market sale of common stock on June 15, 2026

Sale price $17.01 per share Price for the 2,400-share open-market sale

Shares held after transaction 38,600 shares Direct ownership following the reported sale

Net share direction -2,400 shares Net-sell across all reported transactions in this Form 4

Key Terms

open-market sale, common stock, Form 4, non-derivative

4 terms

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

common stock financial

""security_title": "common stock""

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.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

non-derivative financial

""transaction_type": "non-derivative""

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/15/2026 - 04:24 PM Accepted by SEC EDGAR 06/15/2026 - 04:24 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)
06/15/2026

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	06/15/2026		S		2,400	D	$17.01	38,600	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	06/15/2026
	** 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)

FAQ

What insider transaction did CCOI executive Henry Kilmer report?

Henry W. Kilmer, a CCOI vice president, reported selling 2,400 shares of common stock in an open-market transaction. The sale was executed at a price of $17.01 per share, according to the Form 4 filing.

At what price did Henry Kilmer sell CCOI common stock?

He sold 2,400 CCOI common shares at $17.01 per share. This price reflects the execution value disclosed, providing a clear reference for the transaction’s per-share level in the reported open-market sale.

How many CCOI shares does Henry Kilmer hold after this transaction?

After the reported sale, Henry Kilmer holds 38,600 CCOI common shares directly. This post-transaction balance is disclosed in the Form 4 and shows his remaining ownership following the 2,400-share disposition.

What type of Form 4 transaction did CCOI report for Henry Kilmer?

The Form 4 shows an open-market sale of non-derivative common stock by Henry Kilmer. The SEC code “S” indicates a sale in the open market or a private transaction of 2,400 shares at $17.01 per share.

Does Henry Kilmer’s CCOI Form 4 involve derivatives or options?

No, the Form 4 transaction involves only non-derivative common stock. The derivativeSummary section is empty, indicating there were no reported option exercises, warrant conversions, or other derivative transactions in this filing.