Cogent Amends Indenture, Increases Secured Leverage Ratio to 4.75:1.00

Cogent Communications Holdings, Inc. subsidiaries, Cogent Group and Cogent Finance, entered into a First Supplemental Indenture on June 15, 2026. This amendment increases the secured leverage ratio under the "ratio liens" basket from 4.00:1.00 to 4.75:1.00. It also mandates that proceeds from certain data center sales be used by Cogent Group to repurchase or retire existing indebtedness at a discount, with at least 50% specifically targeting the 6.500% Senior Secured Notes due 2032. The changes also restrict the use of these proceeds for increasing restricted payment capacity and prohibit certain transfers of indefeasible rights of use (IRUs).