COGENT COMMUNICATIONS HOLDINGS, INC. — DEFA14A Filings
6 DEFA14A filings on record
This page lists all DEFA14A 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 6 DEFA14A 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 |
|---|---|---|---|---|
| DEFA14A | DEFA14A | 0001104659-21-050407 | Apr 15, 2021 | — |
| DEFA14A | DEFA14A | 0001104659-21-050321 | Apr 15, 2021 | — |
| DEFA14A | DEFA14A | 0001104659-19-021102 | Apr 12, 2019 | — |
| DEFA14A | DEFA14A | 0001104659-18-025765 | Apr 23, 2018 | — |
| DEFA14A | DEFA14A | 0001104659-15-024962 | Apr 1, 2015 | — |
| DEFA14A | DEFA14A | 0001104659-15-023764 | Mar 30, 2015 | — |