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COGENT COMMUNICATIONS HOLDINGS, INC.

SC 13G/A 103 filings

All SC 13G/A Filings

Complete history of SC 13G/A filings with the SEC

Date Filed	View on EDGAR
08 Nov Nov 08, 2024	open_in_new View Filing
23 Oct Oct 23, 2024	open_in_new View Filing
13 Feb Feb 13, 2024	open_in_new View Filing
26 Jan Jan 26, 2024	open_in_new View Filing
22 Jan Jan 22, 2024	open_in_new View Filing
09 Feb Feb 09, 2023	open_in_new View Filing
30 Jan Jan 30, 2023	open_in_new View Filing
10 Feb Feb 10, 2022	open_in_new View Filing
09 Feb Feb 09, 2022	open_in_new View Filing
27 Jan Jan 27, 2022	open_in_new View Filing
25 Jan Jan 25, 2022	open_in_new View Filing
10 May May 10, 2021	open_in_new View Filing
11 Feb Feb 11, 2021	open_in_new View Filing
10 Feb Feb 10, 2021	open_in_new View Filing
26 Jan Jan 26, 2021	open_in_new View Filing
13 Feb Feb 13, 2020	open_in_new View Filing
12 Feb Feb 12, 2020	open_in_new View Filing
04 Feb Feb 04, 2020	open_in_new View Filing
10 May May 10, 2019	open_in_new View Filing
13 Feb Feb 13, 2019	open_in_new View Filing
11 Feb Feb 11, 2019	open_in_new View Filing
24 Jan Jan 24, 2019	open_in_new View Filing
12 Mar Mar 12, 2018	open_in_new View Filing
13 Feb Feb 13, 2018	open_in_new View Filing
09 Feb Feb 09, 2018	open_in_new View Filing
07 Feb Feb 07, 2018	open_in_new View Filing
19 Jan Jan 19, 2018	open_in_new View Filing
14 Feb Feb 14, 2017	open_in_new View Filing
10 Feb Feb 10, 2017	open_in_new View Filing
10 Feb Feb 10, 2017	open_in_new View Filing
12 Jan Jan 12, 2017	open_in_new View Filing
10 Aug Aug 10, 2016	open_in_new View Filing
10 May May 10, 2016	open_in_new View Filing
12 Feb Feb 12, 2016	open_in_new View Filing
12 Feb Feb 12, 2016	open_in_new View Filing
11 Feb Feb 11, 2016	open_in_new View Filing
26 Jan Jan 26, 2016	open_in_new View Filing
05 Oct Oct 05, 2015	open_in_new View Filing
10 Jul Jul 10, 2015	open_in_new View Filing
13 Feb Feb 13, 2015	open_in_new View Filing
12 Feb Feb 12, 2015	open_in_new View Filing
11 Feb Feb 11, 2015	open_in_new View Filing
11 Feb Feb 11, 2015	open_in_new View Filing
09 Feb Feb 09, 2015	open_in_new View Filing
09 Feb Feb 09, 2015	open_in_new View Filing
02 Feb Feb 02, 2015	open_in_new View Filing
14 Feb Feb 14, 2014	open_in_new View Filing
14 Feb Feb 14, 2014	open_in_new View Filing
12 Feb Feb 12, 2014	open_in_new View Filing
28 Jan Jan 28, 2014	open_in_new View Filing
14 Feb Feb 14, 2013	open_in_new View Filing
14 Feb Feb 14, 2013	open_in_new View Filing
14 Feb Feb 14, 2013	open_in_new View Filing
12 Feb Feb 12, 2013	open_in_new View Filing
08 Feb Feb 08, 2013	open_in_new View Filing
14 Feb Feb 14, 2012	open_in_new View Filing
14 Feb Feb 14, 2012	open_in_new View Filing
13 Feb Feb 13, 2012	open_in_new View Filing
10 Feb Feb 10, 2012	open_in_new View Filing
08 Feb Feb 08, 2012	open_in_new View Filing
02 Feb Feb 02, 2012	open_in_new View Filing
11 Jul Jul 11, 2011	open_in_new View Filing
17 Feb Feb 17, 2011	open_in_new View Filing
14 Feb Feb 14, 2011	open_in_new View Filing
14 Feb Feb 14, 2011	open_in_new View Filing
10 Feb Feb 10, 2011	open_in_new View Filing
09 Feb Feb 09, 2011	open_in_new View Filing
08 Dec Dec 08, 2010	open_in_new View Filing
08 Oct Oct 08, 2010	open_in_new View Filing
16 Feb Feb 16, 2010	open_in_new View Filing
12 Feb Feb 12, 2010	open_in_new View Filing
12 Feb Feb 12, 2010	open_in_new View Filing
12 Feb Feb 12, 2010	open_in_new View Filing
10 Feb Feb 10, 2010	open_in_new View Filing
09 Feb Feb 09, 2010	open_in_new View Filing
10 Dec Dec 10, 2009	open_in_new View Filing
10 Sep Sep 10, 2009	open_in_new View Filing
17 Jun Jun 17, 2009	open_in_new View Filing
09 Apr Apr 09, 2009	open_in_new View Filing
09 Mar Mar 09, 2009	open_in_new View Filing
17 Feb Feb 17, 2009	open_in_new View Filing
17 Feb Feb 17, 2009	open_in_new View Filing
17 Feb Feb 17, 2009	open_in_new View Filing
17 Feb Feb 17, 2009	open_in_new View Filing
17 Feb Feb 17, 2009	open_in_new View Filing
17 Feb Feb 17, 2009	open_in_new View Filing
13 Feb Feb 13, 2009	open_in_new View Filing
12 Feb Feb 12, 2009	open_in_new View Filing
06 Feb Feb 06, 2009	open_in_new View Filing
10 Sep Sep 10, 2008	open_in_new View Filing
04 Sep Sep 04, 2008	open_in_new View Filing
10 Jun Jun 10, 2008	open_in_new View Filing
10 Mar Mar 10, 2008	open_in_new View Filing
10 Mar Mar 10, 2008	open_in_new View Filing
14 Feb Feb 14, 2008	open_in_new View Filing
14 Feb Feb 14, 2008	open_in_new View Filing
13 Feb Feb 13, 2008	open_in_new View Filing
12 Dec Dec 12, 2007	open_in_new View Filing
14 Feb Feb 14, 2007	open_in_new View Filing
10 May May 10, 2006	open_in_new View Filing
14 Feb Feb 14, 2006	open_in_new View Filing
14 Feb Feb 14, 2003	open_in_new View Filing
07 Feb Feb 07, 2003	open_in_new View Filing