CCOI FINAL DEADLINE: ROSEN, A TOP RANKED LAW FIRM, Encourages Cogent Communications Holdings, Inc. Investors with Losses in Excess of $100K to Secure Counsel Before Important September 21 Deadline in Securities Class Action - CCOI

New York, New York--(Newsfile Corp. - September 8, 2026) - WHY:  Rosen Law Firm, a global investor rights law firm, reminds purchasers of common stock of Cogent Communications Holdings, Inc. (NASDAQ: CCOI) between February 29, 2024 and May 1, 2026, inclusive (the "Class Period"), of the important September 21, 2026 lead plaintiff deadline . SO WHAT: If you purchased Cogent Communications common stock during the Class Period you may be entitled to compensation without payment of any out of pocket fees or costs through a contingency fee arrangement. WHAT TO DO NEXT: To join the Cogent Communications class action, go to https://rosenlegal.com/cases/cogent-communications-holdings-inc-2026/join or call Phillip Kim, Esq. toll-free at 866-767-3653 or email [email protected] for information on the class action. A class action lawsuit has already been filed. If you wish to serve as lead plaintiff, you must move the Court no later than September 21, 2026 . A lead plaintiff is a representative party acting on behalf of other class members in directing the litigation. WHY ROSEN LAW: We encourage investors to select qualified counsel with a track record of success in leadership roles. Often, firms issuing notices do not have comparable experience, resources, or any meaningful peer recognition. Many of these firms do not actually handle securities class actions, but are merely middlemen that refer clients or partner with law firms that actually litigate the cases . Be wise in selecting counsel. The Rosen Law Firm represents investors throughout the globe, concentrating its practice in securities class actions and shareholder derivative litigation. Rosen Law Firm has achieved the largest ever securities class action settlement against a Chinese Company. Rosen Law Firm was Ranked No. 1 by ISS Securities Class Action Services for number of securities class action settlements in 2017. The firm has been ranked in the top 4 each year since 2013 and has recovered billions of dollars for investors. In 2019 alone the firm secured over $438 million for investors. In 2020, founding partner Laurence Rosen was named by law360 as a Titan of Plaintiffs' Bar. Many of the firm's attorneys have been recognized by Lawdragon and Super Lawyers. DETAILS OF THE CASE: According to the lawsuit, defendants throughout the Class Period made materially false and/or misleading statements and/or failed to disclose that: (1) the vast majority of the purported orders in Cogent's optical wavelength "backlog" were unlikely to ever result in a paid order; (2) large quantities of the customers in Cogent's purported optical wavelength "backlog" were unable or unwilling to accept delivery even if Cogent was in a position to provision the wavelength in a timely manner; (3) as a result of the foregoing, defendants had materially misrepresented customer demand for Cogent's optical wavelength services and the nature of Cogent's purported "backlog" of wavelength orders; (4) as a result of the foregoing, Cogent was not on track to achieve its revenue and margin targets and such targets lacked a reasonable basis in objective fact; (5) Cogent did not have the financial capacity or business fundamentals to maintain its long-standing dividend policy; and (6) there was a material, undisclosed risk that defendant David Schaeffer would be forced to sell vast quantities of Cogent stock as a result of his high-risk pledging activities, thereby further depressing the price of Cogent stock in the event the truth regarding Cogent's "backlog," demand issues, and financial position were ever revealed. When the true details entered the market, the lawsuit claims that investors suffered damages. To join the Cogent Communication class action, go to https://rosenlegal.com/cases/cogent-communications-holdings-inc-2026/join or call Phillip Kim, Esq. toll-free at 866-767-3653 or email [email protected] for information on the class action. No Class Has Been Certified. Until a class is certified, you are not represented by counsel unless you retain one. You may select counsel of your choice. You may also remain an absent class member and do nothing at this point. An investor's ability to share in any potential future recovery is not dependent upon serving as lead plaintiff. Follow us for updates on LinkedIn: https://www.linkedin.com/company/the-rosen-law-firm , on Twitter: https://twitter.com/rosen_firm or on Facebook: https://www.facebook.com/rosenlawfirm/ . Attorney Advertising. Prior results do not guarantee a similar outcome. ------------------------------- Contact Information: Laurence Rosen, Esq. Phillip Kim, Esq. The Rosen Law Firm, P.A. 275 Madison Avenue, 40th Floor New York, NY 10016 Tel: (212) 686-1060 Toll Free: (866) 767-3653 Fax: (212) 202-3827 [email protected] www.rosenlegal.com To view the source version of this press release, please visit https://www.newsfilecorp.com/release/313394 Source: The Rosen Law Firm PA