Cogent officer plans Rule 144 sale of 4,850 shares

Company officer Thaddeus Gerard Weed filed a Rule 144 notice to resell up to 4,850 shares of Cogent Communications common stock, after a similar-sized sale in June 2026.

Rhea-AI Filing Summary

COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) has a notice filed under Rule 144 for potential resale of its common stock by company officer Thaddeus Gerard Weed. The notice covers up to 4,850 shares of common stock to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services on NASDAQ.

The shares to be sold were acquired as restricted stock from the issuer on September 1, 2026. The filing also reports that Weed sold 4,850 shares of Cogent common stock during the prior three months, on June 16, 2026, for an aggregate sale price of $81,434.90.

Key Figures

Shares covered by Rule 144 notice: 4,850 shares Aggregate market value related to current notice: $45,444.99 Shares sold in prior 3 months: 4,850 shares +3 more

6 metrics

Shares covered by Rule 144 notice 4,850 shares Common stock to be sold for the account of Thaddeus Gerard Weed

Aggregate market value related to current notice $45,444.99 Value associated with 4,850 shares of common stock listed in the securities information section

Shares sold in prior 3 months 4,850 shares Common stock sold on June 16, 2026 by Thaddeus Weed

Aggregate sale price of prior 3‑month transaction $81,434.90 Sale of 4,850 shares of common stock on June 16, 2026

Acquisition date of restricted stock September 1, 2026 Date the restricted stock to be sold was acquired from the issuer

Planned sale filing date September 2, 2026 Date associated with the current Rule 144 securities information and signature

Key Terms

Rule 144, Restricted Stock, Aggregate sale price, Executive Financial Services

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock financial

"Common | 09/01/2026 | Restricted Stock | Issuer"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Aggregate sale price financial

"Common | 06/16/2026 | 4850 | 81434.90"

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

FAQ

What does the Form 144 filing disclose for CCOI?

It discloses that officer Thaddeus Gerard Weed filed a Rule 144 notice for the potential resale of 4,850 shares of Cogent Communications common stock through Morgan Stanley Smith Barney LLC Executive Financial Services on NASDAQ.

How many CCOI shares are covered by the new Rule 144 notice?

The notice covers up to 4,850 shares of Cogent Communications common stock, to be sold for the account of officer Thaddeus Gerard Weed under Rule 144.

When and how were the CCOI shares to be sold under this Form 144 acquired?

The shares covered by the notice were acquired as restricted stock from the issuer on September 1, 2026, as stated in the securities-to-be-sold section.

What prior CCOI sales by Thaddeus Weed are reported in the last 3 months?

The filing reports that Thaddeus Weed sold 4,850 shares of Cogent Communications common stock on June 16, 2026 for an aggregate sale price of $81,434.90 during the past three months.

Which broker is involved in the planned CCOI share sale under Rule 144?

The planned resale of up to 4,850 shares of Cogent Communications common stock is listed as being through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza in New York.

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

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Available on EDGAR 09/02/2026 - 04:11 PM Accepted by SEC EDGAR 09/02/2026 - 04:11 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001166978
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	COGENT COMMUNICATIONS HOLDINGS, INC.
SEC File Number	000-51829
Address of Issuer	2450 N St NW, WASHINGTON DISTRICT OF COLUMBIA 20037
Phone	202-295-4200
Name of Person for Whose Account the Securities are To Be Sold	THADDEUS WEED
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	4850	45444.99	51215736	09/02/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/01/2026	Restricted Stock	Issuer			4850	09/01/2026	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
THADDEUS WEED 2450 N St NW, WASHINGTON DC 20037	Common	06/16/2026	4850	81434.90

144: Remarks and Signature

Remarks
Date of Notice	09/02/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Thaddeus Gerard Weed
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)