Form 8-K

8-K — COGENT COMMUNICATIONS HOLDINGS, INC.

Accession: 0001104659-26-078858

Filed: 2026-06-29

Period: 2026-06-29

CIK: 0001158324

SIC: 4899 (COMMUNICATION SERVICES, NEC)

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

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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):

June 29, 2026

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)

(IRS

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 7.01. Regulation FD Disclosure.

As previously announced, on May 22, 2026, Cogent Fiber, LLC, a Delaware

limited liability company (the "Seller") and an indirect wholly owned subsidiary of Cogent Communications Holdings, Inc. (the

"Company"), entered into a Purchase and Sale Agreement (the "Purchase Agreement") with an affiliate of I Squared Capital

(the "Buyer"), providing for the sale by the Seller to the Buyer of 10 data center facilities (the "Facilities"),

together with certain personal property and customer contracts located at each of the Facilities (such transactions contemplated by the

Purchase Agreement, collectively, the "Transaction"). In accordance with the terms and conditions set forth in the Purchase

Agreement, on June 29, 2026 (the "Closing Date"), the Seller completed the sale of the Facilities to the Buyer.

On the Closing Date, the Buyer consummated the Transaction pursuant

to the terms of the Purchase Agreement, providing an aggregate purchase price of $225 million in cash.

On June 29, 2026, the Company issued a press release announcing the

closing of the Transaction, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

The information contained in this Current Report on Form 8-K 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 such information 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 June 29, 2026.

104

Cover Page Interactive

Data File (embedded within the Inline XBRL 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.

June 29, 2026

By:

/s/

David Schaeffer

Name: David Schaeffer

Title: President and Chief Executive Officer

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: tm2619124d1_ex99-1.htm · Sequence: 2

Exhibit 99.1

FOR

IMMEDIATE RELEASE

Cogent Contacts:

For Public

Relations:

For Investor

Relations:

Jocelyn Johnson

John Chang

+ 1 (202) 295-4299

+ 1 (202) 295-4212

jajohnson@cogentco.com

investor.relations@cogentco.com

Cogent Communications

Announces

Closing of Sale of 10 Data Center Facilities

WASHINGTON, D.C., June 29, 2026 –

Cogent Communications Holdings, Inc. (“Cogent”) (NASDAQ: CCOI) today announced that its indirect wholly owned subsidiary,

Cogent Fiber, LLC, has closed the previously announced sale of 10 data center facilities for an aggregate purchase price of $225 million

in cash to a newly formed entity sponsored by I Squared Capital.

The 10 facilities are located in Phoenix,

AZ, Anaheim, CA, Burbank, CA, Stockton, CA, Atlanta, GA, Chicago, IL, Elkridge, MD, Kansas City, MO, Nashville, TN and Houston, TX.

About Cogent

Cogent (NASDAQ: CCOI) is a facilities-based

provider of low cost, high speed Internet access and private network services to bandwidth intensive businesses. Cogent’s facilities-based,

all-optical IP network provides services in 306 markets globally.

Cogent is headquartered at 2450 N Street,

NW, Washington, D.C. 20037. For more information, visit www.cogentco.com. Cogent can be reached in the United States at (202)

295-4200 or via email at info@cogentco.com.

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