UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported): November 6, 2025

Cogent Communications Holdings, Inc.

(Exact name of registrant as specified in its charter)

Delaware		000-51829		46-5706863
(State or other jurisdiction of incorporation)		(Commission File Number)		(I.R.S. Employer Identification No.)

2450 N St NW, Washington, D.C.		20037
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: 202-295-4200

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Trading Symbol	Name of Each Exchange on which Registered
Common Stock, par value $0.001 per share	CCOI	NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 2.02 Results of Operations and Financial Condition.

On November 6, 2025, Cogent Communications Holdings, Inc. issued a press release summarizing its financial results for the third quarter of 2025. The Company will hold a conference call regarding its financial results at 8:30 a.m. ET on November 6, 2025, which will be simultaneously broadcast on a link available through the Company’s website at www.cogentco.com. The press release is furnished as Exhibit 99.1 to this current report on Form 8-K.

The information in Item 2.02 of this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits:

Exhibit Number		Description

99.1		Press Release of Cogent Communications Holdings, Inc. dated November 6, 2025. (filed herewith).
104		Cover Page Data File (the cover page XBRL tags are embedded within the iXBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	Cogent Communications Holdings, Inc.


November 6, 2025	By:	/s/ David Schaeffer
		Name: David Schaeffer
		Title: President and Chief Executive Officer

COGENT COMMUNICATIONS HOLDINGS, INC. 8-K