COGENT COMMUNICATIONS HOLDINGS, INC. — SC 13G/A Filings
97 SC 13G/A filings on record
This page lists all SC 13G/A filings submitted to the SEC by COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI), sorted by most recent first. Each row links to the full filing on EdgarLookup. COGENT COMMUNICATIONS HOLDINGS, INC. has filed 97 SC 13G/A documents with the SEC since 2017. To view all SEC filings by COGENT COMMUNICATIONS HOLDINGS, INC., see the full filings list.
All
10-K
10-Q
10-Q/A
144
144/A
3
3/A
4
4/A
424B3
424B4
424B5
424B7
425
5
8-A12B
8-A12G
8-K
8-K/A
8-K12G3
ARS
CERTAMX
CORRESP
CT ORDER
DEF 14A
DEF 14C
DEFA14A
FWP
IRANNOTICE
POS AM
PRE 14A
PRE 14C
PRER14A
PRER14C
RW
S-1
S-1/A
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SC 14D9
SC 14D9/A
SC TO-I
SC TO-I/A
SC TO-T
SC TO-T/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC 13G/A | — | 0002012383-24-003382 | Nov 8, 2024 | — |
| SC 13G/A | — | 0002012383-24-001851 | Oct 23, 2024 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-24-020638 | Feb 13, 2024 | — |
| SC 13G/A | AMENDMENT NO. 1 TO SCHEDULE 13G | 0000945621-24-000130 | Jan 26, 2024 | — |
| SC 13G/A | — | 0001086364-24-001057 | Jan 22, 2024 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-23-015660 | Feb 9, 2023 | — |
| SC 13G/A | — | 0001306550-23-004536 | Jan 30, 2023 | — |
| SC 13G/A | — | 0001037389-22-000023 | Feb 10, 2022 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-22-016860 | Feb 9, 2022 | — |
| SC 13G/A | — | 0000834237-22-001707 | Jan 27, 2022 | — |
| SC 13G/A | — | 0000834237-22-000327 | Jan 25, 2022 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-21-063592 | May 10, 2021 | — |
| SC 13G/A | — | 0001037389-21-000182 | Feb 11, 2021 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-21-017785 | Feb 10, 2021 | — |
| SC 13G/A | — | 0000834237-21-001238 | Jan 26, 2021 | — |
| SC 13G/A | — | 0001037389-20-000158 | Feb 13, 2020 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-20-017407 | Feb 12, 2020 | — |
| SC 13G/A | — | 0000834237-20-001513 | Feb 4, 2020 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001144204-19-025146 | May 10, 2019 | — |
| SC 13G/A | — | 0001037389-19-000158 | Feb 13, 2019 | — |
| SC 13G/A | — | 0000932471-19-004379 | Feb 11, 2019 | — |
| SC 13G/A | — | 0000215457-19-000905 | Jan 24, 2019 | — |
| SC 13G/A | — | 0000932471-18-005329 | Mar 12, 2018 | — |
| SC 13G/A | — | 0000315066-18-001156 | Feb 13, 2018 | — |
| SC 13G/A | — | 0000932471-18-003200 | Feb 9, 2018 | — |
| SC 13G/A | SC 13G/A | 0001193125-18-034127 | Feb 7, 2018 | — |
| SC 13G/A | — | 0000215457-18-001619 | Jan 19, 2018 | — |
| SC 13G/A | — | 0000315066-17-001516 | Feb 14, 2017 | — |
| SC 13G/A | — | 0000932471-17-001334 | Feb 10, 2017 | — |
| SC 13G/A | SC 13G/A | 0001193125-17-038234 | Feb 10, 2017 | — |
| SC 13G/A | — | 0000869311-17-000338 | Jan 12, 2017 | — |
| SC 13G/A | — | 0000932471-16-013891 | Aug 10, 2016 | — |
| SC 13G/A | — | 0000215457-16-006199 | May 10, 2016 | — |
| SC 13G/A | SC 13G/A | 0001193125-16-460237 | Feb 12, 2016 | — |
| SC 13G/A | — | 0000315066-16-004945 | Feb 12, 2016 | — |
| SC 13G/A | — | 0000932471-16-012232 | Feb 11, 2016 | — |
| SC 13G/A | — | 0000215457-16-002416 | Jan 26, 2016 | — |
| SC 13G/A | SC 13G/A | 0001193125-15-337114 | Oct 5, 2015 | — |
| SC 13G/A | — | 0000315066-15-002824 | Jul 10, 2015 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT NO. 4 | 0001193125-15-047207 | Feb 13, 2015 | — |
| SC 13G/A | HOLDINGS REPORT | 0001460629-15-000001 | Feb 12, 2015 | — |
| SC 13G/A | — | 0000932471-15-004988 | Feb 11, 2015 | — |
| SC 13G/A | SC 13G/A | 0001193125-15-043003 | Feb 11, 2015 | — |
| SC 13G/A | — | 0000215457-15-000147 | Feb 9, 2015 | — |
| SC 13G/A | 13G AMENDED ANNUAL FILING - CCOI | 0000053417-15-000032 | Feb 9, 2015 | — |
| SC 13G/A | — | 0000315066-14-001993 | Feb 14, 2014 | — |
| SC 13G/A | SC 13G/A | 0001193125-14-051542 | Feb 14, 2014 | — |
| SC 13G/A | — | 0000932471-14-004215 | Feb 12, 2014 | — |
| SC 13G/A | — | 0001086364-14-000615 | Jan 28, 2014 | — |
| SC 13G/A | SC 13G/A | 0001193125-13-058979 | Feb 14, 2013 | — |