WASHINGTON, D.C. November 18, 2021 – Cogent Communications Holdings, Inc.(“Cogent”) (NASDAQ: CCOI), one of the largest Internet service providers in the world, today announced that Dave Schaeffer, Cogent’s Chief Executive Officer, and Sean Wallace, Cogent’s Chief Financial Officer, will participate in the following conferences:

The BofA Securities 2021 Leveraged Finance Conference, which is being held virtually. Dave Schaeffer and Sean Wallace will be presenting on Tuesday, November 30, 2021 at 7:30 a.m. ET.

The Credit Suisse 25^th Annual Technology Conference, which is being held at the Phoenician Resort in Scottsdale, AZ. Dave Schaeffer and Sean Wallace will be presenting on Wednesday, December 1, 2021 at 8:45 a.m. MT.

The UBS 2021 Global TMT Conference, which is being held virtually. Dave Schaeffer and Sean Wallace will be presenting on Monday, December 6, 2021 at 3:00 p.m. ET.

Investors and other interested parties may access a live audio webcast of the conference presentation by going to the “Events” section of Cogent’s website at www.cogentco.com/events. Replays of the BofA Securities and Credit Suisse webcasts will be available for 90 days following the presentation. A replay of the UBS webcast will be available for 30 days following the presentation.

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 over 215 markets across 50 countries.

Cogent is headquartered at 2450 N St, 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 Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo..

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Information in this release may involve expectations, beliefs, plans, intentions or strategies regarding the future. These forward-looking statements involve risks and uncertainties. All forward-looking statements included in this release are based upon information available to Cogent Communications Holdings, Inc. as of the date of the release, and we assume no obligation to update any such forward-looking statement. The statements in this release are not guarantees of future performance and actual results could differ materially from our current expectations. Numerous factors could cause or contribute to such differences. Some of the factors and risks associated with our business are discussed in Cogent’s registration statements filed with the Securities and Exchange Commission and in its other reports filed from time to time with the SEC.

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