COGENT COMMUNICATIONS HOLDINGS (CCOI) director sells 3,300 shares

Rhea-AI Filing Summary

COGENT COMMUNICATIONS HOLDINGS, INC. director Sheryl Lynn Kennedy reported an open-market sale of common stock. On May 14, 2026, she sold 3,300 shares at an average price of 16.2177 per share. After this transaction, she directly holds 10,245 shares of common stock.

Insider Trade Summary

Net Seller: 3,300 shares ($53,518)

Net Sell 1 txn

Insider Kennedy Sheryl Lynn

Role null

Sold 3,300 shs ($54K)

Type	Security	Shares	Price	Value
Sale	common stock	3,300	$16.2177	$54K

Holdings After Transaction: common stock — 10,245 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 3,300 shares Sale price per share: 16.2177 Shares held after transaction: 10,245 shares +1 more

4 metrics

Shares sold 3,300 shares open-market sale on May 14, 2026

Sale price per share 16.2177 average price for the 3,300 shares sold

Shares held after transaction 10,245 shares direct ownership after May 14, 2026 sale

Net shares sold 3,300 shares net change in buy/sell activity in this Form 4

Key Terms

common stock, open-market sale, transaction code

3 terms

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.

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.

transaction code financial

""transaction_code": "S""

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^*

Kennedy Sheryl Lynn

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

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	05/14/2026		S		3,300	D	$16.2177	10,245	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/ Sheryl Kennedy	05/18/2026
	** 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 director Sheryl Lynn Kennedy report?

Director Sheryl Lynn Kennedy reported selling 3,300 shares of CCOI common stock. The open-market sale occurred on May 14, 2026 at an average price of 16.2177 per share, as disclosed in the Form 4 filing.

At what price did Sheryl Lynn Kennedy sell CCOI shares in this Form 4?

She sold the CCOI common stock at an average price of 16.2177 per share. This price applies to the 3,300 shares sold in the open-market transaction reported for May 14, 2026.

How many CCOI shares does Sheryl Lynn Kennedy hold after the reported sale?

Following the reported transaction, she directly holds 10,245 CCOI common shares. This post-transaction holding reflects her remaining ownership after selling 3,300 shares in the May 14, 2026 open-market sale.

What does the transaction code S indicate in the CCOI Form 4?

Transaction code S in the CCOI Form 4 indicates a sale of securities. In this case, it reflects an open-market or private transaction where 3,300 common shares were sold at an average price of 16.2177 per share.

Was the CCOI Form 4 transaction by Sheryl Lynn Kennedy direct or indirect ownership?

The transaction involved directly owned CCOI common stock. The ownership type is coded as D for direct ownership, meaning the 3,300 shares sold and 10,245 shares remaining are held in her own name.