X0508 4 2025-12-31 0001158324 COGENT COMMUNICATIONS HOLDINGS, INC. CCOI 0001166978 WEED THADDEUS GERARD 2450 N ST NW 4TH FLOOR WASHINGTON DC 20037 false true false false VICE PRESIDENT, CFO 0 common stock 2025-12-31 4 A 0 19400 0 A 107600 D common stock 2025-12-31 4 A 0 100000 0 A 207600 D The award of restricted stock shall vest in one third of the grant on January 1 of each of 2027, 2028 and 2029. The award shall vest effective January 1, 2029, based on Mr. Weed's continued employment to that date /s/ Thaddeus G. Weed 2026-01-05