COGENT COMMUNICATIONS HOLDINGS, INC. — DEF 14A Filings
23 DEF 14A filings on record
This page lists all DEF 14A 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 23 DEF 14A 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 |
|---|---|---|---|---|
| DEF 14A | DEF 14A | 0001104659-26-032744 | Mar 20, 2026 | May 1, 2026 |
| DEF 14A | FORM DEF 14A | 0001104659-25-028214 | Mar 26, 2025 | May 7, 2025 |
| DEF 14A | FORM DEF14A | 0001104659-24-038424 | Mar 25, 2024 | May 8, 2024 |
| DEF 14A | DEF 14A | 0001104659-23-032758 | Mar 15, 2023 | — |
| DEF 14A | DEF 14A | 0001104659-22-033195 | Mar 14, 2022 | May 4, 2022 |
| DEF 14A | DEF 14A | 0001104659-21-032599 | Mar 5, 2021 | Apr 28, 2021 |
| DEF 14A | DEF 14A | 0001047469-20-001415 | Mar 12, 2020 | May 6, 2020 |
| DEF 14A | DEF 14A | 0001047469-19-001306 | Mar 15, 2019 | May 1, 2019 |
| DEF 14A | DEF 14A | 0001047469-18-005080 | Jul 19, 2018 | Sep 10, 2018 |
| DEF 14A | DEF 14A | 0001047469-18-001876 | Mar 20, 2018 | May 2, 2018 |
| DEF 14A | DEF 14A | 0001047469-17-001701 | Mar 17, 2017 | May 3, 2017 |
| DEF 14A | DEF 14A | 0001047469-16-011447 | Mar 22, 2016 | May 4, 2016 |
| DEF 14A | DEF 14A | 0001047469-15-002452 | Mar 19, 2015 | Apr 16, 2015 |
| DEF 14A | DEF 14A | 0001047469-14-001757 | Mar 4, 2014 | Apr 17, 2014 |
| DEF 14A | DEF 14A | 0001047469-13-001906 | Feb 28, 2013 | Apr 18, 2013 |
| DEF 14A | DEF 14A | 0001047469-12-002056 | Mar 2, 2012 | Apr 19, 2012 |
| DEF 14A | DEF 14A | 0001047469-11-001746 | Mar 4, 2011 | Apr 27, 2011 |
| DEF 14A | DEF 14A | 0001047469-10-001672 | Mar 1, 2010 | Apr 15, 2010 |
| DEF 14A | DEF 14A | 0001047469-09-002659 | Mar 13, 2009 | Apr 23, 2009 |
| DEF 14A | DEF 14A | 0001047469-08-002417 | Mar 10, 2008 | Apr 17, 2008 |
| DEF 14A | DEF 14A | 0001104659-07-024143 | Mar 30, 2007 | Apr 30, 2007 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001104659-06-028906 | Apr 28, 2006 | Jun 7, 2006 |
| DEF 14A | DEF 14A | 0000912057-02-021411 | May 21, 2002 | Jun 13, 2002 |