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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: 6/13/25 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
$46.98 $86.76 $43.65 $2,318 49 741 8.6% 16.1% 96.32% 8.17%
Exch Sector Industry Sub-Industry
NasdaqGS Services Business Services Services- Prepackaged Software
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#
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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
1y
18
33%
15%
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
2
1y
18
33%
15%
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
3
1y
18
33%
15%
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
4
1y
18
33%
15%
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
5
1y
18
33%
15%
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
6
1y
18
33%
15%
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
7
1y
120
32%
19%
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
8
1y
70
39%
7%
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
9
1y
18
33%
15%
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
10
1y
18
33%
15%
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
11
1y
39
28%
10%
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
12
1y
18
33%
15%
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
13
1y
18
33%
15%
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
14
1y
18
33%
15%
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
15
    
 
CHANG JOHN B
VP,LO
JS
---
398
---
6/2/25
---
---
76,847
-0.5
D
---
6/3/25 - 4:27:10 pm
16
1y
18
33%
15%
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
17
1y
18
33%
15%
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
18
1y
18
33%
15%
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
19
1y
120
32%
19%
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
20
1y
23
43%
9%
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
21
1y
18
33%
15%
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
22
1y
18
33%
15%
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
23
1y
18
33%
15%
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
24
1y
18
33%
15%
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
25
1y
18
33%
15%
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
26
1y
18
33%
15%
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
27
    
 
WEED THADDEUS GERARD
VP,CFO
JS
---
---
---
5/16/25
---
---
103,000
---
D
A
5/19/25 - 1:42:24 pm
28
1y
120
32%
19%
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
29
1y
18
33%
15%
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
30
1y
18
33%
15%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$1,519,140
30,000
---
5/14/25
---
$50.64
4,311,721
-0.7
D
---
5/15/25 - 4:12:04 pm
31
    
 
CHANG JOHN B
VP,LO
JS
---
756
---
5/13/25
---
---
77,245
-1.0
D
---
5/15/25 - 4:13:15 pm
32
    
 
CHANG JOHN B
VP,LO
JB
---
504
---
5/13/25
---
---
3,089
19.5
I
---
5/15/25 - 4:13:15 pm
33
1y
18
33%
15%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$2,720,232
54,000
5/12/25
5/13/25
$50.10
$50.45
4,341,721
-1.2
D
---
5/14/25 - 4:17:51 pm
34
    
 
KENNEDY SHERYL LYNN
DIR
S
$72,773
1,450
---
5/13/25
---
$50.19
10,049
-12.6
D
---
5/13/25 - 4:11:26 pm
35
    
 
SCHAEFFER DAVE
CB,CEO,PR,DIR
JS
---
48,317
---
4/4/25
---
---
4,395,721
-1.1
D
---
4/4/25 - 4:09:32 pm
36
    
 
HOWELL DENEEN C
DIR
JB
---
1,352
---
3/31/25
---
---
17,689
8.3
D
---
4/1/25 - 10:07:54 am
37
    
 
MONTAGNER MARC
DIR
JB
---
1,352
---
3/31/25
---
---
85,201
1.6
D
---
3/31/25 - 5:23:05 pm
38
    
 
KENNEDY SHERYL LYNN
DIR
JB
---
1,352
---
3/31/25
---
---
11,499
13.3
D
---
3/31/25 - 5:22:35 pm
39
    
 
HOWARD EVE N
DIR
JB
---
1,352
---
3/31/25
---
---
12,665
12.0
D
---
3/31/25 - 5:22:02 pm
40
    
 
FERGUSON LEWIS H
DIR
JB
---
1,352
---
3/31/25
---
---
20,004
7.2
D
---
3/31/25 - 5:20:34 pm
41
    
 
DE SA PAUL
DIR
JB
---
1,352
---
3/31/25
---
---
19,151
7.6
D
---
3/31/25 - 5:19:22 pm
42
    
 
BROOKS STEVEN D
DIR
JB
---
1,352
---
3/31/25
---
---
44,052
3.2
D
---
3/31/25 - 5:18:23 pm
43
    
 
BATH BLAKE
DIR
JB
---
1,352
---
3/31/25
---
---
12,606
12.0
D
---
3/31/25 - 5:17:50 pm
44
1y
23
43%
9%
1
FERGUSON LEWIS H
DIR
S
$66,313
956
---
3/12/25
---
$69.36
18,652
-4.9
D
---
3/13/25 - 5:43:50 pm
45
    
 
CHANG JOHN B
VP,LO
JS
---
357
---
3/10/25
---
---
78,358
-0.5
D
---
3/12/25 - 10:45:48 am
46
1y
70
39%
7%
1
KILMER HENRY W
VP
S
$174,168
2,400
---
3/7/25
---
$72.57
41,000
-5.5
D
---
3/10/25 - 12:07:43 pm
47
    
 
CHANG JOHN B
VP,LO
JS
---
715
---
3/5/25
---
---
78,715
-0.9
D
---
3/7/25 - 8:56:40 am
48
    
 
CHANG JOHN B
VP,LO
JB
---
715
---
3/5/25
---
---
2,585
38.2
I
---
3/7/25 - 8:56:40 am
49
1y
18
33%
15%
1
SCHAEFFER DAVE
CB,CEO,PR,DIR
S
$4,305,978
60,000
---
3/4/25
---
$71.77
4,444,038
-1.3
D
---
3/5/25 - 4:40:00 pm
50
1y
39
28%
10%
1
BUBECK JAMES
O
S
$143,348
2,000
---
3/4/25
---
$71.67
57,142
-3.4
D
---
3/5/25 - 11:42:01 am
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