Cogent CFO sells 4,850 shares at $9.37

Cogent’s CFO sold a small block of common stock and continues to hold a substantial direct position.

Rhea-AI Filing Summary

COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) reports that its vice president and chief financial officer, Thaddeus Gerard Weed, sold 4,850 shares of common stock on September 2, 2026 in a sale reported as an open-market or private transaction at $9.3701 per share, and now directly holds 193,050 shares. No Rule 10b5-1 trading plan is reported for this transaction.

Insider Trade Summary

Net Seller: 4,850 shares

Net Sell 1 txn

Insider WEED THADDEUS GERARD

Role VICE PRESIDENT, CFO

Sold 4,850 shs ($45K)

Type	Security	Shares	Price	Value
Sale	common stock	4,850	$9.3701	$45K

Holdings After Transaction: common stock — 193,050 shares (Direct)

Key Figures

Shares sold: 4,850 shares Sale price per share: $9.3701 per share Shares held after transaction: 193,050 shares +1 more

4 metrics

Shares sold 4,850 shares Sale of common stock on September 2, 2026

Sale price per share $9.3701 per share Reported price for the September 2, 2026 sale

Shares held after transaction 193,050 shares Direct ownership by CFO after the sale

Net shares sold 4,850 shares Net selling activity in this Form 4

Key Terms

open market or private transaction, direct ownership, common stock

3 terms

open market or private transaction financial

"Sale in open market or private transaction"

direct ownership financial

"the CFO’s post-transaction holding is direct ownership"

common stock financial

"sold 4,850 shares of 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.

FAQ

What insider transaction did CCOI report for its CFO?

COGENT COMMUNICATIONS HOLDINGS, INC. reported that CFO Thaddeus Gerard Weed sold 4,850 shares of common stock on September 2, 2026 in a sale described as an open-market or private transaction.

At what price did the CCOI CFO sell shares in this Form 4?

The CCOI CFO sold 4,850 shares of common stock at a reported price of $9.3701 per share on September 2, 2026, in a transaction labeled as a sale in an open market or private transaction.

How many CCOI shares does the CFO hold after this reported sale?

After the reported sale, CFO Thaddeus Gerard Weed directly holds 193,050 shares of COGENT COMMUNICATIONS HOLDINGS, INC. common stock, according to the Form 4 filing data.

Was the CCOI CFO’s September 2, 2026 sale under a Rule 10b5-1 plan?

No. The Form 4 for CCOI indicates the Rule 10b5-1 checkbox is not affirmed, and there is no footnote stating that the September 2, 2026 sale was made pursuant to a Rule 10b5-1 trading plan.

Is the CCOI CFO’s ownership direct or indirect after the transaction?

The Form 4 shows the CFO’s post-transaction holding of 193,050 shares as direct ownership, with no nature-of-ownership footnote or indirect holding entity indicated.

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Available on EDGAR 09/03/2026 - 09:46 AM Accepted by SEC EDGAR 09/03/2026 - 09:45 AM 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^*

WEED THADDEUS GERARD

(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)
	VICE PRESIDENT, CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/02/2026

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	09/02/2026		S		4,850	D	$9.3701	193,050	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/ Thaddeus G. Weed	09/02/2026
	** 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)