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 S  AS  JS*  OS  OS*  3
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 JS
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Detailed Insider History for:
GREAT LAKES DREDGE AND DOCK CORP: GLDD
Price: 3/27/26 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
$16.97 $16.99 $7.51 $1,133 67 1,552 0.0% 5.1% 86.72% 3.11%
Exch Sector Industry Sub-Industry
NasdaqGS Construction Heavy Construction Other Than Building Construction Contractors Heavy Construction Other Than Bldg Const- Contractors
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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
    
 
SCHIFFER VIVIENNE
VP,LO,CCO,SEC
JS
---
144,817
---
4/1/26
---
---
---
All
D
R
4/1/26 - 4:33:42 pm
2
    
 
SCHIFFER VIVIENNE
VP,LO,CCO,SEC
JB
---
28,945
---
4/1/26
---
---
144,817
25.0
D
R
4/1/26 - 4:33:42 pm
3
    
 
PETTERSON LASSE
CEO,PR,DIR
JS
---
1,568,290
---
4/1/26
---
---
---
All
D
R
4/1/26 - 4:31:01 pm
4
    
 
PETTERSON LASSE
CEO,PR,DIR
JB
---
206,445
---
4/1/26
---
---
1,568,290
15.2
D
R
4/1/26 - 4:31:01 pm
5
    
 
KORNBLAU SCOTT LEE
VP,CFO
JS
---
244,126
---
4/1/26
---
---
---
All
D
R
4/1/26 - 4:28:16 pm
6
    
 
KORNBLAU SCOTT LEE
VP,CFO
JB
---
90,518
---
4/1/26
---
---
244,126
58.9
D
R
4/1/26 - 4:28:16 pm
7
    
 
JOHANSON DAVID
VP,OO
JS
---
191,598
---
4/1/26
---
---
---
All
D
R
4/1/26 - 4:24:22 pm
8
    
 
JOHANSON DAVID
VP,OO
JB
$5,641
72,381
3/25/26
4/1/26
---
$10.82
191,598
60.7
D
R
4/1/26 - 4:24:22 pm
9
    
 
HANSON WILLIAM H
VP
JS
---
90,853
---
4/1/26
---
---
---
All
D
R
4/1/26 - 4:21:14 pm
10
    
 
HANSON WILLIAM H
VP
JB
---
13,631
---
4/1/26
---
---
90,853
17.7
D
R
4/1/26 - 4:21:14 pm
11
    
 
GUNSTEN CHRISTOPHER
VP
JS
---
182,496
---
4/1/26
---
---
---
All
D
R
4/1/26 - 4:17:21 pm
12
    
 
GUNSTEN CHRISTOPHER
VP
JB
---
71,860
---
4/1/26
---
---
182,496
65.0
D
R
4/1/26 - 4:17:21 pm
13
    
 
BEYKO ELENI
VP
JS
---
151,312
---
4/1/26
---
---
---
All
D
R
4/1/26 - 4:14:25 pm
14
    
 
BEYKO ELENI
VP
JB
---
25,505
---
4/1/26
---
---
151,312
20.3
D
R
4/1/26 - 4:14:25 pm
15
    
 
BAYER RYAN
VP,CAO
JS
---
37,380
---
4/1/26
---
---
---
All
D
R
4/1/26 - 4:09:46 pm
16
    
 
BAYER RYAN
VP,CAO
JB
---
5,607
---
4/1/26
---
---
37,380
17.6
D
R
4/1/26 - 4:09:46 pm
17
    
 
STEGER RONALD
DIR
JS
---
20,404
---
4/1/26
---
---
---
All
D
---
4/1/26 - 4:04:37 pm
18
    
 
SHIPP EARL L
DIR
JS
---
42,619
---
4/1/26
---
---
---
All
D
---
4/1/26 - 4:01:53 pm
19
    
 
SHANAHAN KATHLEEN M
DIR
JS
---
76,375
---
4/1/26
---
---
---
All
D
---
4/1/26 - 3:59:28 pm
20
    
 
DICKERSON LAWRENCE R
DIR
JS
---
86,217
---
4/1/26
---
---
---
All
D
---
4/1/26 - 3:57:08 pm
21
    
 
ARMSTRONG DANA A
DIR
JS
---
8,436
---
4/1/26
---
---
---
All
D
---
4/1/26 - 3:53:18 pm
22
    
 
SCHIFFER VIVIENNE
VP,LO,CCO,SEC
JS
$171,416
10,125
---
3/16/26
---
$16.93
99,270
-9.3
D
R
3/18/26 - 5:22:24 pm
23
    
 
SCHIFFER VIVIENNE
VP,LO,CCO,SEC
JB
---
24,667
---
3/16/26
---
---
118,418
26.3
D
R
3/18/26 - 5:22:24 pm
24
    
 
PETTERSON LASSE
CEO,PR,DIR
JS
$1,757,690
103,821
---
3/16/26
---
$16.93
1,313,978
-7.3
D
R
3/18/26 - 5:10:38 pm
25
    
 
PETTERSON LASSE
CEO,PR,DIR
JB
---
173,464
---
3/16/26
---
---
1,392,902
14.2
D
R
3/18/26 - 5:10:38 pm
26
    
 
KORNBLAU SCOTT LEE
VP,CFO
JS
$376,828
22,258
---
3/16/26
---
$16.93
134,014
-14.2
D
R
3/18/26 - 5:06:00 pm
27
    
 
KORNBLAU SCOTT LEE
VP,CFO
JB
---
37,133
---
3/16/26
---
---
159,459
30.4
D
R
3/18/26 - 5:06:00 pm
28
    
 
SCHIFFER VIVIENNE
VP,LO,CCO,SEC
JB
---
19,149
---
2/23/26
---
---
101,330
23.3
D
R
2/25/26 - 5:04:04 pm
29
    
 
PETTERSON LASSE
CEO,PR,DIR
JB
---
132,825
---
2/23/26
---
---
1,292,202
11.5
D
R
2/25/26 - 4:58:38 pm
30
    
 
KORNBLAU SCOTT LEE
VP,CFO
JB
---
26,603
---
2/23/26
---
---
138,733
23.7
D
R
2/25/26 - 4:54:11 pm
31
    
 
GUNSTEN CHRISTOPHER
VP
JB
---
13,988
---
2/23/26
---
---
99,940
16.3
D
R
2/25/26 - 4:51:26 pm
32
    
 
JOHANSON DAVID
VP,OO
JB
---
13,988
---
2/23/26
---
---
105,951
15.2
D
R
2/25/26 - 4:44:34 pm
33
    
 
HANSON WILLIAM H
VP
JB
---
9
---
2/23/26
---
---
68,986
0.0
D
R
2/25/26 - 4:41:32 pm
34
    
 
BEYKO ELENI
VP
JB
---
16,320
---
2/23/26
---
---
121,834
15.5
D
R
2/25/26 - 4:34:25 pm
35
    
 
BAYER RYAN
VP,CAO
JB
---
7,165
---
2/23/26
---
---
31,739
29.2
D
R
2/25/26 - 4:30:32 pm
36
    
 
SHANAHAN KATHLEEN M
DIR
JB
---
5,851
---
1/15/26
---
---
76,375
8.3
D
---
1/20/26 - 4:55:29 pm
37
    
 
BEYKO ELENI
VP
JS
$106,115
8,088
---
12/31/25
---
$13.12
125,807
-6.0
D
---
3/25/26 - 5:18:37 pm
38
    
 
SHIPP EARL L
DIR
JB
---
1,829
---
12/31/25
---
---
42,619
4.5
D
---
1/5/26 - 6:02:34 pm
39
    
 
ARMSTRONG DANA A
DIR
JB
---
1,829
---
12/31/25
---
---
8,436
27.7
D
---
1/5/26 - 5:52:41 pm
40
    
 
JOHANSON DAVID
VP,OO
AS
$29,308
2,100
---
12/10/25
---
$13.96
91,963
-2.2
D
10b
12/12/25 - 4:24:29 pm
41
    
 
JOHANSON DAVID
VP,OO
AS
$130,155
10,000
---
12/3/25
---
$13.02
94,063
-9.6
D
10b
12/4/25 - 5:17:13 pm
42
    
 
SHIPP EARL L
DIR
JB
---
2,002
---
9/30/25
---
---
40,790
5.2
D
---
10/1/25 - 5:07:47 pm
43
    
 
ARMSTRONG DANA A
DIR
JB
---
2,002
---
9/30/25
---
---
6,607
43.5
D
---
10/1/25 - 4:45:58 pm
44
6m
1
0%
49%
2
KORNBLAU SCOTT LEE
VP,CFO
AS
$686,322
59,805
---
8/11/25
---
$11.48
112,130
-34.8
D
10b
8/13/25 - 5:17:25 pm
45
    
 
SHIPP EARL L
DIR
JB
---
1,969
---
6/30/25
---
---
38,788
5.3
D
---
7/1/25 - 5:16:14 pm
46
    
 
ARMSTRONG DANA A
DIR
JB
---
1,969
---
6/30/25
---
---
4,605
74.7
D
---
7/1/25 - 5:05:42 pm
47
1y
1
0%
3%
2
STEGER RONALD
DIR
S
$57,925
5,000
---
6/3/25
---
$11.59
20,404
-19.7
D
---
6/4/25 - 5:00:10 pm
48
    
 
BAYER RYAN
VP,CAO
JB
---
10,126
---
5/8/25
---
---
24,574
70.1
D
A,R
3/25/26 - 5:14:07 pm
49
    
 
BEYKO ELENI
VP
JB
---
15,376
---
5/8/25
---
---
105,514
17.1
D
A,R
3/25/26 - 5:08:52 pm
50
    
 
HANSON WILLIAM H
VP
JB
---
8,237
---
5/8/25
---
---
68,977
13.6
D
A,R
3/25/26 - 5:02:45 pm
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