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 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
COGENT COMMUNICATIONS HOLDINGS INC: CCOI
Price: 10/10/25 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$42.05 $86.76 $29.62 $2,068 49 1,466 9.7% 19.0% 101.40% 2.47%
Exch Sector Industry Sub-Industry
NasdaqGS Transportation, Communications, Electric, Gas, And Sanitary Services Communications Communications Services, N E C
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Insider Statistics
T N H M S
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
    
 
FERGUSON LEWIS H
DIR
JB
---
2,395
---
9/30/25
---
---
23,267
11.5
D
---
10/2/25 - 1:13:30 pm
2
    
 
DE SA PAUL
DIR
JB
---
2,395
---
9/30/25
---
---
23,514
11.3
D
---
10/2/25 - 12:11:32 pm
3
    
 
HOWELL DENEEN C
DIR
JB
---
2,395
---
9/30/25
---
---
22,052
12.2
D
---
10/1/25 - 6:21:42 pm
4
    
 
BROOKS STEVEN D
DIR
JB
---
2,395
---
9/30/25
---
---
48,415
5.2
D
---
10/1/25 - 5:37:33 pm
5
    
 
HOWARD EVE N
DIR
JB
---
2,395
---
9/30/25
---
---
17,028
16.4
D
---
10/1/25 - 5:36:41 pm
6
    
 
KENNEDY SHERYL LYNN
DIR
JB
---
2,395
---
9/30/25
---
---
12,412
23.9
D
---
10/1/25 - 5:35:18 pm
7
    
 
MONTAGNER MARC
DIR
JB
---
2,395
---
9/30/25
---
---
89,564
2.7
D
---
10/1/25 - 5:30:03 pm
8
1y
71
39%
6%
1
KILMER HENRY W
VP
S
$88,776
2,400
---
9/5/25
---
$36.99
36,200
-6.2
D
---
9/5/25 - 4:33:59 pm
9
    
 
HARRIS MARK ANDREW
VP
JB
---
668
---
9/2/25
---
---
5,168
14.8
D
R
9/3/25 - 10:44:51 am
10
    
 
HARRIS MARK ANDREW
VP
3
---
---
---
9/2/25
---
---
4,500
---
D
R
9/3/25 - 9:36:39 am
11
1y
121
32%
18%
1
WEED THADDEUS GERARD
VP,CFO
S
$181,202
4,900
---
9/2/25
---
$36.98
93,100
-5.0
D
---
9/2/25 - 4:23:31 pm
12
    
 
KENNEDY SHERYL LYNN
DIR
S
$72,700
2,000
---
8/21/25
---
$36.35
10,017
-16.6
D
---
8/21/25 - 4:54:58 pm
13
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
JS*
$22,519,998
818,909
---
8/8/25
---
$27.50
697,143
-54.0
D
---
8/11/25 - 5:11:55 pm
14
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
JS*
$60,005,808
1,840,669
---
8/7/25
---
$32.60
1,516,052
-54.8
D
---
8/8/25 - 5:03:29 pm
15
    
 
HOWARD EVE N
DIR
JB
---
1,968
---
6/30/25
---
---
14,633
15.5
D
---
7/1/25 - 5:58:24 pm
16
    
 
BROOKS STEVEN D
DIR
JB
---
1,968
---
6/30/25
---
---
46,020
4.5
D
---
7/1/25 - 5:57:51 pm
17
    
 
MONTAGNER MARC
DIR
JB
---
1,968
---
6/30/25
---
---
87,169
2.3
D
---
7/1/25 - 5:45:29 pm
18
    
 
KENNEDY SHERYL LYNN
DIR
JB
---
1,968
---
6/30/25
---
---
12,017
19.6
D
---
7/1/25 - 5:44:25 pm
19
    
 
HOWELL DENEEN C
DIR
JB
---
1,968
---
6/30/25
---
---
19,657
11.1
D
---
7/1/25 - 5:43:36 pm
20
    
 
FERGUSON LEWIS H
DIR
JB
---
1,968
---
6/30/25
---
---
20,872
10.4
D
---
7/1/25 - 5:41:55 pm
21
    
 
DE SA PAUL
DIR
JB
---
1,968
---
6/30/25
---
---
21,119
10.3
D
---
7/1/25 - 5:41:21 pm
22
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$3,297,609
70,000
---
6/16/25
---
$47.05
3,356,721
-2.0
D
---
6/16/25 - 4:53:17 pm
23
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$2,607,204
55,000
---
6/13/25
---
$47.34
3,426,721
-1.6
D
---
6/16/25 - 10:03:22 am
24
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$2,632,372
55,000
---
6/12/25
---
$47.83
3,481,721
-1.6
D
---
6/12/25 - 5:29:08 pm
25
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$2,668,135
55,000
---
6/11/25
---
$48.35
3,536,721
-1.5
D
---
6/12/25 - 10:11:07 am
26
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$2,677,490
55,000
---
6/10/25
---
$48.63
3,591,721
-1.5
D
---
6/10/25 - 6:15:38 pm
27
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$2,675,347
55,000
---
6/9/25
$48.51
$48.99
3,646,721
-1.5
D
---
6/9/25 - 6:23:12 pm
28
1y
121
32%
18%
1
WEED THADDEUS GERARD
VP,CFO
S
$235,396
4,900
---
6/9/25
---
$48.04
98,000
-4.8
D
---
6/9/25 - 4:51:18 pm
29
1y
71
39%
6%
1
KILMER HENRY W
VP
S
$115,080
2,400
---
6/6/25
---
$47.95
38,600
-5.9
D
---
6/9/25 - 4:49:28 pm
30
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$3,822,124
80,000
---
6/6/25
---
$47.78
3,701,721
-2.1
D
---
6/9/25 - 4:48:07 pm
31
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$3,547,316
75,000
---
6/5/25
$47.29
$47.31
3,781,721
-1.9
D
---
6/9/25 - 9:09:57 am
32
1y
40
30%
9%
1
BUBECK JAMES
O
S
$94,999
2,000
---
6/4/25
---
$47.50
55,142
-3.5
D
---
6/6/25 - 9:16:12 am
33
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$3,581,983
75,000
---
6/4/25
---
$47.76
3,856,721
-1.9
D
---
6/5/25 - 5:08:36 pm
34
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$3,052,867
65,000
---
6/3/25
---
$46.86
3,931,721
-1.6
D
---
6/4/25 - 4:06:40 pm
35
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$3,011,141
65,000
---
6/2/25
---
$46.13
3,996,721
-1.6
D
---
6/3/25 - 4:28:59 pm
36
    
 
CHANG JOHN B
VP,LO
JS
---
398
---
6/2/25
---
---
76,847
-0.5
D
---
6/3/25 - 4:27:10 pm
37
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$1,147,425
25,000
---
5/30/25
---
$45.90
4,061,721
-0.6
D
---
6/2/25 - 4:08:04 pm
38
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$1,172,593
25,000
---
5/29/25
---
$46.90
4,086,721
-0.6
D
---
5/30/25 - 4:03:18 pm
39
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$948,174
20,000
---
5/28/25
---
$47.41
4,111,721
-0.5
D
---
5/29/25 - 4:30:50 pm
40
1y
121
32%
18%
1
WEED THADDEUS GERARD
VP,CFO
S
$4,767
100
---
5/28/25
---
$47.66
102,900
-0.1
D
---
5/29/25 - 4:05:16 pm
41
1y
24
46%
7%
1
FERGUSON LEWIS H
DIR
S
$52,327
1,100
---
5/28/25
---
$47.57
18,904
-5.5
D
---
5/29/25 - 4:04:23 pm
42
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$973,322
20,000
---
5/27/25
---
$48.67
4,131,721
-0.5
D
---
5/28/25 - 4:29:57 pm
43
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$1,173,318
25,000
---
5/23/25
---
$46.93
4,151,721
-0.6
D
---
5/27/25 - 4:13:43 pm
44
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$1,156,768
25,000
---
5/22/25
---
$46.27
4,176,721
-0.6
D
---
5/23/25 - 4:02:52 pm
45
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$1,872,248
40,000
---
5/21/25
---
$46.81
4,201,721
-0.9
D
---
5/22/25 - 4:25:25 pm
46
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$749,348
15,000
---
5/20/25
---
$49.96
4,241,721
-0.4
D
---
5/21/25 - 4:20:31 pm
47
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$764,925
15,000
---
5/16/25
---
$50.99
4,256,721
-0.4
D
---
5/19/25 - 4:21:56 pm
48
    
 
WEED THADDEUS GERARD
VP,CFO
JS
---
---
---
5/16/25
---
---
103,000
---
D
A
5/19/25 - 1:42:24 pm
49
1y
121
32%
18%
1
WEED THADDEUS GERARD
VP,CFO
S
$5,041
100
---
5/16/25
---
$50.41
102,900
-0.1
D
---
5/16/25 - 4:24:48 pm
50
1y
20
40%
9%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$2,015,036
40,000
---
5/15/25
---
$50.38
4,271,721
-0.9
D
---
5/16/25 - 4:04:46 pm
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