Director Sheryl Kennedy sells 3,300 Cogent (CCOI) shares in open trade

Rhea-AI Filing Summary

COGENT COMMUNICATIONS HOLDINGS, INC. director Sheryl Lynn Kennedy reported an open-market sale of common stock. On March 5, 2026, she sold 3,300 shares of Cogent common stock at an average price of $22.9901 per share. After this transaction, she directly held 10,100 shares of Cogent common stock.

Insider Trade Summary

Net Seller: 3,300 shares ($75,867)

Net Sell 1 txn

Insider Kennedy Sheryl Lynn

Role Director

Sold 3,300 shs ($76K)

Type	Security	Shares	Price	Value
Sale	common stock	3,300	$22.9901	$76K

Holdings After Transaction: common stock — 10,100 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^*

Kennedy Sheryl Lynn

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/05/2026

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	03/05/2026		S		3,300	D	$22.9901	10,100	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	03/05/2026
	** 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 director Sheryl Lynn Kennedy report?

Director Sheryl Lynn Kennedy reported selling 3,300 shares of Cogent Communications common stock. The transaction was an open-market sale at an average price of $22.9901 per share, reducing her directly held position to 10,100 shares after the sale was completed.

At what price did Sheryl Lynn Kennedy sell CCOI common stock shares?

Sheryl Lynn Kennedy sold Cogent Communications common stock at an average price of $22.9901 per share. This price applied to the 3,300 shares sold in the reported open-market transaction dated March 5, 2026, as disclosed in the Form 4 insider filing.

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

After the reported transaction, Sheryl Lynn Kennedy directly holds 10,100 shares of Cogent Communications common stock. This figure reflects her ownership position following the open-market sale of 3,300 shares reported for March 5, 2026, in the Form 4 filing.

Was the CCOI insider transaction by Sheryl Lynn Kennedy a buy or a sell?

The transaction reported by Sheryl Lynn Kennedy was a sale of Cogent Communications common stock. The Form 4 lists it as an open-market sale of 3,300 shares at an average price of $22.9901 per share, reducing her directly held share balance.

What type of ownership does Sheryl Lynn Kennedy report for her CCOI shares?

Sheryl Lynn Kennedy reports direct ownership of her Cogent Communications shares. The Form 4 indicates the 10,100 shares held after the sale are owned directly, meaning they are attributed to her personally rather than through an intermediary entity or indirect holding structure.

On what date did Sheryl Lynn Kennedy’s CCOI stock sale occur?

The reported sale of Cogent Communications common stock by Sheryl Lynn Kennedy occurred on March 5, 2026. On that date, she executed an open-market sale of 3,300 shares at an average price of $22.9901 per share, as reflected in the Form 4.