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COI
- As of 10/31/24, 07:08:42 PM: 131 Insider Transactions.
Sector:
Unknown
Industry:
Internet Service Providers
Prev Close:
$0.00
Avg Vol(3m):
0
P/E:
0.00
EPS:
0.00
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Insider Transactions for COI
Buy/Sell*
Filed Date
Subject
Symbol
Acquirer
Pct Owned
Details
B
2020-02-13 11:29:29.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
RENAISSANCE TECHNOLOGIES LLC
7.66%
view
S
2020-02-11 19:29:22.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
VANGUARD GROUP INC
10.05%
view
S
2020-02-04 11:53:15.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
BlackRock Inc
14.7%
view
B
2019-05-10 12:06:56.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
VANGUARD GROUP INC
10.3%
view
B
2019-02-13 10:18:16.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
RENAISSANCE TECHNOLOGIES LLC
7.35%
view
S
2019-02-11 08:55:48.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
VANGUARD GROUP INC
9.84%
view
B
2019-01-24 13:43:52.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
BlackRock Inc
14.8%
view
B
2018-03-12 12:30:13.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
VANGUARD GROUP INC
10.01%
view
B
2018-02-14 11:27:48.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
RENAISSANCE TECHNOLOGIES LLC
6.04%
view
S
2018-02-13 09:35:34.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
FMR LLC
4.478%
view
S
2018-02-08 19:45:19.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
VANGUARD GROUP INC
9.93%
view
S
2018-02-07 10:15:03.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
FRONTIER CAPITAL MANAGEMENT CO LLC
2.734%
view
B
2018-01-19 14:03:41.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
BlackRock Inc
13.7%
view
S
2017-02-14 10:55:12.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
FMR LLC
6.475%
view
S
2017-02-10 16:08:03.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
FRONTIER CAPITAL MANAGEMENT CO LLC
6.26%
view
S
2017-02-10 09:41:50.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
VANGUARD GROUP INC
10.32%
view
B
2017-01-12 11:22:50.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
BlackRock Inc
10.3%
view
B
2016-08-10 08:27:45.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
VANGUARD GROUP INC
10.33%
view
B
2016-05-10 11:17:58.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
BlackRock Inc
10.0%
view
B
2016-02-12 09:01:36.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
FMR LLC
11.22%
view
S
2016-02-11 18:10:36.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
FRONTIER CAPITAL MANAGEMENT CO LLC
8.64%
view
B
2016-02-11 10:31:19.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
VANGUARD GROUP INC
7.7%
view
B
2016-01-26 08:19:30.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
BlackRock Inc
6.8%
view
S
2015-10-05 09:34:34.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LLC
n/a
view
B
2015-07-10 07:47:17.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
FMR LLC
10.523%
view
B
2015-02-13 10:09:45.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
FMR LLC
7.661%
view
B
2015-02-12 17:58:30.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
FRONTIER CAPITAL MANAGEMENT CO LLC
9.86%
view
S
2015-02-12 09:41:25.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
Sarbit Advisory Services Inc
0.0%
view
B
2015-02-11 10:24:09.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
VANGUARD GROUP INC
6.33%
view
B
2015-02-11 09:24:00.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LLC
5.1%
view
S
2015-02-09 13:17:19.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
JENNISON ASSOCIATES LLC
2.3%
view
S
2015-02-06 17:52:13.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
BlackRock Inc
5.5%
view
S
2015-02-02 11:54:03.0
COGENT COMMUNICATIONS HOLDINGS
CCOI
PRUDENTIAL FINANCIAL INC
2.3%
view
S
2014-02-14 06:47:32.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
1.785%
view
B
2014-02-12 11:57:03.0
COGENT COMMUNICATIONS GROUP INC
CCOI
VANGUARD GROUP INC
5.9%
view
B
2014-02-12 10:40:21.0
COGENT COMMUNICATIONS GROUP INC
CCOI
Sarbit Advisory Services Inc
6.62%
view
B
2014-02-06 17:01:43.0
COGENT COMMUNICATIONS GROUP INC
CCOI
JENNISON ASSOCIATES LLC
5.6%
view
B
2014-02-05 10:20:50.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PRUDENTIAL FINANCIAL INC
5.6%
view
B
2014-01-28 15:23:00.0
COGENT COMMUNICATIONS GROUP INC
CCOI
BlackRock Inc
5.6%
view
S
2013-02-14 13:51:40.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
5.718%
view
S
2013-02-14 12:56:49.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FRONTIER CAPITAL MANAGEMENT CO LLC
7.823%
view
S
2013-02-14 11:29:53.0
COGENT COMMUNICATIONS GROUP INC
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LLC
n/a
view
B
2013-02-14 09:34:31.0
COGENT COMMUNICATIONS GROUP INC
CCOI
Sarbit Advisory Services Inc
5.85%
view
B
2013-02-12 15:44:02.0
COGENT COMMUNICATIONS GROUP INC
CCOI
VANGUARD GROUP INC
5.85%
view
S
2013-02-08 16:18:46.0
COGENT COMMUNICATIONS GROUP INC
CCOI
BlackRock Inc
5.28%
view
S
2012-02-14 16:50:36.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FRONTIER CAPITAL MANAGEMENT CO LLC
8.708%
view
S
2012-02-14 12:13:40.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
7.548%
view
B
2012-02-13 14:48:13.0
COGENT COMMUNICATIONS GROUP INC
CCOI
BlackRock Inc
5.33%
view
S
2012-02-10 15:46:26.0
COGENT COMMUNICATIONS GROUP INC
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LLC
5.5%
view
S
2012-02-08 10:35:53.0
COGENT COMMUNICATIONS GROUP INC
CCOI
MORGAN STANLEY
3.1%
view
B
2012-02-07 16:14:42.0
COGENT COMMUNICATIONS GROUP INC
CCOI
VANGUARD GROUP INC
5.31%
view
S
2012-02-02 15:25:00.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PENINSULA CAPITAL ADVISORS LLC
0.0%
view
S
2011-07-11 13:49:33.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
8.414%
view
S
2011-02-17 13:32:40.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PRICE T ROWE ASSOCIATES INC
1.8%
view
B
2011-02-14 18:38:30.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FRONTIER CAPITAL MANAGEMENT CO LLC
9.246%
view
B
2011-02-14 17:43:27.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
13.526%
view
B
2011-02-11 18:06:56.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PENINSULA CAPITAL ADVISORS LLC
9.2%
view
S
2011-02-10 17:16:52.0
COGENT COMMUNICATIONS GROUP INC
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LLC
6.1%
view
S
2011-02-09 12:24:57.0
COGENT COMMUNICATIONS GROUP INC
CCOI
MORGAN STANLEY
6.5%
view
S
2010-12-08 14:33:50.0
COGENT COMMUNICATIONS GROUP INC
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LLC
6.5%
view
B
2010-10-08 12:18:39.0
COGENT COMMUNICATIONS GROUP INC
CCOI
BlackRock Inc
4.88%
view
S
2010-02-16 12:47:08.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
10.642%
view
S
2010-02-12 16:47:20.0
COGENT COMMUNICATIONS GROUP INC
CCOI
CHILTON INVESTMENT CO LLC
2.1%
view
S
2010-02-12 13:10:56.0
COGENT COMMUNICATIONS GROUP INC
CCOI
MORGAN STANLEY
7.8%
view
B
2010-02-10 13:41:09.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PENINSULA INVESTMENT PARTNERS
9.87%
view
B
2010-02-09 15:03:33.0
COGENT COMMUNICATIONS GROUP INC
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LP
11.9%
view
B
2009-12-10 16:13:22.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
10.659%
view
S
2009-09-10 16:05:37.0
COGENT COMMUNICATIONS GROUP INC
CCOI
CHILTON INVESTMENT CO LLC
5.6%
view
S
2009-06-17 11:12:04.0
COGENT COMMUNICATIONS GROUP INC
CCOI
Norges Bank
4.85%
view
S
2009-04-09 16:52:36.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
n/a
view
B
2009-03-09 09:56:55.0
COGENT COMMUNICATIONS GROUP INC
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LP
11.47%
view
S
2009-02-17 15:33:09.0
COGENT COMMUNICATIONS GROUP INC
CCOI
MORGAN STANLEY
7.9%
view
B
2009-02-17 08:12:06.0
COGENT COMMUNICATIONS GROUP INC
CCOI
SHUMWAY CAPITAL PARTNERS LLC
12.0%
view
B
2009-02-12 16:35:52.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PRICE T ROWE ASSOCIATES INC
10.6%
view
B
2009-01-26 14:15:32.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PENINSULA INVESTMENT PARTNERS LP
8.97%
view
S
2009-01-22 09:15:15.0
COGENT COMMUNICATIONS GROUP INC
CCOI
Norges Bank
5.16%
view
B
2008-11-10 16:10:59.0
COGENT COMMUNICATIONS GROUP INC
CCOI
CHILTON INVESTMENT CO LLC
11.9%
view
S
2008-09-10 15:58:13.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
n/a
view
B
2008-09-04 12:45:53.0
COGENT COMMUNICATIONS GROUP INC
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LP
10.72%
view
S
2008-06-10 09:32:43.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
n/a
view
B
2008-05-27 14:58:21.0
COGENT COMMUNICATIONS GROUP INC
CCOI
Norges Bank
5.16%
view
B
2008-03-10 16:17:42.0
COGENT COMMUNICATIONS GROUP INC
CCOI
MORGAN STANLEY
10.6%
view
B
2008-03-10 14:33:21.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PRICE T ROWE ASSOCIATES INC
10.0%
view
B
2008-02-19 14:47:18.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PBK HOLDINGS INC
5.3%
view
S
2008-02-14 16:19:48.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR LLC
n/a
view
B
2008-02-14 15:27:56.0
COGENT COMMUNICATIONS GROUP INC
CCOI
MORGAN STANLEY
9.6%
view
S
2008-02-13 19:07:34.0
COGENT COMMUNICATIONS GROUP INC
CCOI
TREMBLANT CAPITAL GROUP
5.1%
view
S
2008-02-13 12:25:10.0
COGENT COMMUNICATIONS GROUP INC
CCOI
ZIFF ASSET MANAGEMENT LP
2.0%
view
B
2008-02-13 09:34:58.0
COGENT COMMUNICATIONS GROUP INC
CCOI
PRICE T ROWE ASSOCIATES INC
8.3%
view
B
2008-01-22 16:23:31.0
COGENT COMMUNICATIONS GROUP INC
CCOI
COLUMBIA WANGER ASSET MANAGEMENT LP
7.79%
view
S
2007-12-12 11:47:53.0
COGENT COMMUNICATIONS GROUP INC
CCOI
Schreiber Suydam Van Zandt
4.77%
view
B
2007-12-10 16:17:20.0
COGENT COMMUNICATIONS GROUP INC
CCOI
SHUMWAY CAPITAL PARTNERS LLC
6.6%
view
B
2007-08-17 14:27:57.0
COGENT COMMUNICATIONS GROUP INC
CCOI
Schreiber Suydam Van Zandt
5.02%
view
B
2007-08-09 17:25:30.0
COGENT COMMUNICATIONS GROUP INC
CCOI
TREMBLANT CAPITAL GROUP
5.6%
view
S
2007-06-27 12:14:12.0
COGENT COMMUNICATIONS GROUP INC
CCOI
BNP EUROPE TE LECOM & MEDIA FUND II LP
0.0%
view
S
2007-02-14 14:41:18.0
COGENT COMMUNICATIONS GROUP INC
CCOI
OAK MANAGEMENT CORP
0.1%
view
B
2007-02-01 17:04:39.0
COGENT COMMUNICATIONS GROUP INC
CCOI
ZIFF ASSET MANAGEMENT LP
6.2%
view
S
2006-12-11 17:16:36.0
COGENT COMMUNICATIONS GROUP INC
CCOI
FMR CORP
n/a
view
S
2006-11-29 11:33:50.0
COGENT COMMUNICATIONS GROUP INC
CCOI
BNP EUROPE TE LECOM & MEDIA FUND II LP
5.83%
view
S
2006-11-20 15:44:39.0
COGENT COMMUNICATIONS GROUP INC
CCOI
WORLDVIEW TECHNOLOGY PARTNERS IV LP
2.9%
view
S
2006-11-17 18:39:09.0
COGENT COMMUNICATIONS GROUP INC
CCOI
JERUSALEM VENTURE PARTNERS IV LP
5.0%
view
S
2006-09-18 18:38:02.0
COGENT COMMUNICATIONS GROUP INC
CCOI
JERUSALEM VENTURE PARTNERS IV LP
8.4%
view
S
2006-07-03 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
WORLDVIEW TECHNOLOGY PARTNERS IV LP
5.8%
view
S
2006-06-23 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
OAK MANAGEMENT CORP
7.9%
view
S
2006-06-23 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
JERUSALEM VENTURE PARTNERS IV LP
10.0%
view
S
2006-06-16 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
BNP EUROPE TE LECOM & MEDIA FUND II LP
7.94%
view
S
2006-05-10 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
FMR CORP
n/a
view
S
2006-02-14 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
Cisco Systems Capital CORP
3.9%
view
B
2006-02-14 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
FMR CORP
n/a
view
S
2005-06-27 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
Cisco Systems Capital CORP
8.0%
view
S
2005-06-27 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
Cisco Systems Capital CORP
8.0%
view
S
2005-04-14 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
BNP EUROPE TE LECOM & MEDIA FUND II LP
12.68%
view
S
2005-03-16 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
BCP CAPITAL
6.687%
view
S
2005-02-23 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
OAK MANAGEMENT CORP
14.6%
view
B
2005-02-17 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
Cisco Systems Capital CORP
10.5%
view
S
2004-12-17 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
BNP EUROPE TE LECOM & MEDIA FUND II LP
12.68%
view
B
2004-11-08 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
PETERSON KENNETH D JR
9.56%
view
S
2004-08-05 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
BNP EUROPE TE LECOM & MEDIA FUND II LP
14.4%
view
S
2004-04-21 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
BROADVIEW CAPITAL PARTNERS LP
7.809%
view
B
2004-04-14 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
BNP EUROPE TE LECOM & MEDIA FUND II LP
15.1%
view
S
2004-04-09 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
JERUSALEM VENTURE PARTNERS IV LP
19.1%
view
S
2004-04-09 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
WORLDVIEW TECHNOLOGY PARTNERS IV LP
12.8%
view
S
2004-04-06 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
OAK MANAGEMENT CORP
15.4%
view
B
2003-08-11 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
BROADVIEW CAPITAL PARTNERS LP
9.795%
view
B
2003-08-11 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
WORLDVIEW TECHNOLOGY PARTNERS IV LP
17.76%
view
B
2003-08-11 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
JERUSALEM VENTURE PARTNERS IV LP
23.72%
view
B
2003-08-08 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
OAK MANAGEMENT CORP
18.0%
view
B
2003-02-14 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
JERUSALEM VENTURE PARTNERS L P
21.75%
view
B
2003-02-14 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
WORLDVIEW TECHNOLOGY PARTNERS IV LP
17.06%
view
B
2003-02-07 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
OAK MANAGEMENT CORP
14.9%
view
B
2002-02-19 00:00:00.0
COGENT COMMUNICATIONS GROUP INC
COI
OAK MANAGEMENT CORP
14.71%
view
* Institutions do not report transaction buy/sell types directly. To help members better understand the transactions, this column is filled by InsiderCow's best-effort interpretations.