8-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

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

Date of Report (Date of Earliest Event Reported):     March 17, 2020

Cogent Communications Holdings, Inc.

(Exact name of registrant as specified in its charter)

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:

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. ¨

On March 17, 2020, Cogent Communications Holdings, Inc. (the “Company”) announced that, Thaddeus (Tad) Weed, its Chief Financial Officer (Principal Financial and Principal Accounting Officer), will be on a temporary medical leave of absence, effective immediately. Mr. Weed’s medical leave is not related to the COVID-19 novel coronavirus.

During Mr. Weed’s leave of absence, Jean-Michel Slagmuylder will serve as Acting Chief Financial Officer and Treasurer (Principal Financial and Principal Accounting Officer), effective immediately.

Mr. Slagmuylder, age 57, has served as the Company’s Chief Financial Officer – Europe since 2004. From 1999 to 2004, Mr. Slagmuylder served as Finance Manager for LNG Holdings SA, which was acquired by the Company in 2004.

Mr. Slagmuylder has an employment agreement under which he serves as Chief Financial Officer – Europe. Mr. Slagmuylder’s employment agreement entitles him to a base salary of 275,103 Euros, Mr. Slagmuylder may terminate his employment with the Company by giving two months’ written notice and the Company is required to provide three months’ written notice to terminate his employment. In the event the Company’s termination is without cause, Mr. Slagmuylder is entitled to three months of salary.

Mr. Slagmuylder’s compensation will not change in connection with this interim appointment.

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.