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Detailed Insider History for:
COGENT COMMUNICATIONS HOLDINGS INC: CCOI
Price: 1/9/26 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
$22.94 $84.06 $15.96 $1,128 49 1,571 13.3% 18.1% 105.87% 2.72%
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
    
 
SCHAEFFER DAVE
CB,CEO,PR,DIR
JS
---
229,657
---
12/31/25
---
---
697,143
-24.8
D
R
1/5/26 - 4:44:10 pm
2
    
 
SCHAEFFER DAVE
CB,CEO,PR,DIR
JB
---
229,657
---
12/31/25
---
---
229,657
New
I
R
1/5/26 - 4:44:10 pm
3
    
 
SCHAEFFER DAVE
CB,CEO,PR,DIR
JB
---
229,657
---
12/31/25
---
---
926,800
32.9
D
R
1/5/26 - 4:44:10 pm
4
    
 
MONTAGNER MARC
DIR
JB
---
3,388
---
12/31/25
---
---
92,952
3.8
D
---
1/5/26 - 4:41:20 pm
5
    
 
KENNEDY SHERYL LYNN
DIR
JB
---
3,388
---
12/31/25
---
---
13,400
33.8
D
---
1/5/26 - 4:38:52 pm
6
    
 
HOWELL DENEEN C
DIR
JB
---
3,388
---
12/31/25
---
---
25,440
15.4
D
---
1/5/26 - 4:38:16 pm
7
    
 
HOWARD EVE N
DIR
JB
---
3,388
---
12/31/25
---
---
20,416
19.9
D
---
1/5/26 - 4:37:39 pm
8
    
 
FERGUSON LEWIS H
DIR
JB
---
3,388
---
12/31/25
---
---
22,655
17.6
D
---
1/5/26 - 4:37:05 pm
9
    
 
DE SA PAUL
DIR
JB
---
3,388
---
12/31/25
---
---
26,902
14.4
D
---
1/5/26 - 4:36:26 pm
10
    
 
BROOKS STEVEN D
DIR
JB
---
3,388
---
12/31/25
---
---
51,803
7.0
D
---
1/5/26 - 4:35:41 pm
11
    
 
WEED THADDEUS GERARD
VP,CFO
JB
---
119,400
---
12/31/25
---
---
207,600
135.4
D
R
1/5/26 - 4:34:05 pm
12
    
 
KILMER HENRY W
VP
JB
---
9,600
---
12/31/25
---
---
43,400
28.4
D
R
1/5/26 - 4:29:36 pm
13
    
 
HARRIS MARK ANDREW
VP
JB
---
105,000
---
12/31/25
---
---
110,168
2,031.7
D
R
1/5/26 - 4:27:17 pm
14
    
 
CHANG JOHN B
VP,LO
JB
---
109,600
---
12/31/25
---
---
188,847
138.3
D
R
1/5/26 - 4:26:30 pm
15
1y
122
33%
17%
1
WEED THADDEUS GERARD
VP,CFO
S
$175,127
7,300
---
12/11/25
---
$23.99
88,200
-7.6
D
---
12/12/25 - 4:21:03 pm
16
1y
72
40%
5%
1
KILMER HENRY W
VP
S
$94,992
4,800
---
12/8/25
---
$19.79
33,800
-12.4
D
---
12/8/25 - 4:12:03 pm
17
1y
25
48%
3%
1
FERGUSON LEWIS H
DIR
S
$81,341
4,000
---
12/2/25
---
$20.34
19,267
-17.2
D
---
12/2/25 - 7:48:26 pm
18
    
 
WEED THADDEUS GERARD
VP,CFO
JB
---
2,400
---
12/1/25
---
---
95,500
2.6
D
R
12/3/25 - 9:34:44 am
19
    
 
CHANG JOHN B
VP,LO
JB
---
2,400
---
12/1/25
---
---
79,247
3.1
D
R
12/2/25 - 4:26:51 pm
20
    
 
KILMER HENRY W
VP
JS
---
2,400
---
12/1/25
---
---
38,600
-5.9
D
R
12/2/25 - 4:25:54 pm
21
    
 
KENNEDY SHERYL LYNN
DIR
S
$51,221
2,400
---
11/11/25
---
$21.34
10,012
-19.3
D
---
11/12/25 - 1:45:32 pm
22
    
 
FERGUSON LEWIS H
DIR
JB
---
2,395
---
9/30/25
---
---
23,267
11.5
D
---
10/2/25 - 1:13:30 pm
23
    
 
DE SA PAUL
DIR
JB
---
2,395
---
9/30/25
---
---
23,514
11.3
D
---
10/2/25 - 12:11:32 pm
24
    
 
HOWELL DENEEN C
DIR
JB
---
2,395
---
9/30/25
---
---
22,052
12.2
D
---
10/1/25 - 6:21:42 pm
25
    
 
BROOKS STEVEN D
DIR
JB
---
2,395
---
9/30/25
---
---
48,415
5.2
D
---
10/1/25 - 5:37:33 pm
26
    
 
HOWARD EVE N
DIR
JB
---
2,395
---
9/30/25
---
---
17,028
16.4
D
---
10/1/25 - 5:36:41 pm
27
    
 
KENNEDY SHERYL LYNN
DIR
JB
---
2,395
---
9/30/25
---
---
12,412
23.9
D
---
10/1/25 - 5:35:18 pm
28
    
 
MONTAGNER MARC
DIR
JB
---
2,395
---
9/30/25
---
---
89,564
2.7
D
---
10/1/25 - 5:30:03 pm
29
1y
72
40%
5%
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
30
    
 
HARRIS MARK ANDREW
VP
JB
---
668
---
9/2/25
---
---
5,168
14.8
D
R
9/3/25 - 10:44:51 am
31
    
 
HARRIS MARK ANDREW
VP
3
---
---
---
9/2/25
---
---
4,500
---
D
R
9/3/25 - 9:36:39 am
32
1y
122
33%
17%
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
33
    
 
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
34
1y
21
43%
5%
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
35
1y
21
43%
5%
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
36
    
 
HOWARD EVE N
DIR
JB
---
1,968
---
6/30/25
---
---
14,633
15.5
D
---
7/1/25 - 5:58:24 pm
37
    
 
BROOKS STEVEN D
DIR
JB
---
1,968
---
6/30/25
---
---
46,020
4.5
D
---
7/1/25 - 5:57:51 pm
38
    
 
MONTAGNER MARC
DIR
JB
---
1,968
---
6/30/25
---
---
87,169
2.3
D
---
7/1/25 - 5:45:29 pm
39
    
 
KENNEDY SHERYL LYNN
DIR
JB
---
1,968
---
6/30/25
---
---
12,017
19.6
D
---
7/1/25 - 5:44:25 pm
40
    
 
HOWELL DENEEN C
DIR
JB
---
1,968
---
6/30/25
---
---
19,657
11.1
D
---
7/1/25 - 5:43:36 pm
41
    
 
FERGUSON LEWIS H
DIR
JB
---
1,968
---
6/30/25
---
---
20,872
10.4
D
---
7/1/25 - 5:41:55 pm
42
    
 
DE SA PAUL
DIR
JB
---
1,968
---
6/30/25
---
---
21,119
10.3
D
---
7/1/25 - 5:41:21 pm
43
1y
21
43%
5%
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
44
1y
21
43%
5%
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
45
1y
21
43%
5%
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
46
1y
21
43%
5%
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
47
1y
21
43%
5%
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
48
1y
21
43%
5%
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
49
1y
122
33%
17%
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
50
1y
72
40%
5%
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
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