144 0001790695 XXXXXXXX LIVE 0001158324 COGENT COMMUNICATIONS HOLDINGS, INC. 000-51829 2450 N St NW 4th Floor Washington DC 20037 2022954274 Sheryl Lynn Kennedy Director common stock RBC DOMINION SECURITIES INC.

181 Bay St Suite 2200 Toronto A6 20037

1000 60000 48623846 11/27/2023 NASDAQ common stock 10/01/2023 Issuer consideration for services as director Q3 2023. Issuer N 1000 10/01/2023 No cash payment. Shares were delivered as consideration for services as director Q3 2023. Y 11/27/2023 /s/ Sheryl Kennedy