Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001104659-26-017968
Filing Date
2026-02-20
Accepted
2026-02-20 11:11:27
Documents
97
Period of Report
2025-12-31

Document Format Files

Seq Description Document Type Size
1 10-K ccoi-20251231x10k.htm   iXBRL 10-K 2815553
2 EX-10.17 ccoi-20251231xex10d17.htm EX-10.17 237607
3 EX-21.1 ccoi-20251231xex21d1.htm EX-21.1 84090
4 EX-23.1 ccoi-20251231xex23d1.htm EX-23.1 7250
5 EX-31.1 ccoi-20251231xex31d1.htm EX-31.1 9567
6 EX-31.2 ccoi-20251231xex31d2.htm EX-31.2 9577
7 EX-32.1 ccoi-20251231xex32d1.htm EX-32.1 5984
8 EX-32.2 ccoi-20251231xex32d2.htm EX-32.2 5986
9 GRAPHIC ccoi-20251231x10k002.jpg GRAPHIC 70814
10 GRAPHIC ccoi-20251231x10k003.jpg GRAPHIC 48239
  Complete submission text file 0001104659-26-017968.txt   14213827

Data Files

Seq Description Document Type Size
11 EX-101.SCH ccoi-20251231.xsd EX-101.SCH 91976
12 EX-101.CAL ccoi-20251231_cal.xml EX-101.CAL 101219
13 EX-101.DEF ccoi-20251231_def.xml EX-101.DEF 448796
14 EX-101.LAB ccoi-20251231_lab.xml EX-101.LAB 875637
15 EX-101.PRE ccoi-20251231_pre.xml EX-101.PRE 656143
100 EXTRACTED XBRL INSTANCE DOCUMENT ccoi-20251231x10k_htm.xml XML 2486298
Mailing Address 2450 N STREET, NW WASHINGTON DC 20037
Business Address 2450 N STREET, NW WASHINGTON DC 20037 2022954200
COGENT COMMUNICATIONS HOLDINGS, INC. (Filer) CIK: 0001158324 (see all company filings)

EIN.: 522337274 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 000-51829 | Film No.: 26657420
SIC: 4899 Communications Services, NEC
(CF Office: 06 Technology)