United States Construction & Engineering

Great Lakes Dredge & Dock Corp (GLDD)

Track

Great Lakes Dredge & Dock Corp experienced insider trading activity primarily through planned sales. The most recent transactions occurred on December 10, 2025, involving David Johanson. These divestments follow a pattern of scheduled equity liquidations by various officers and directors observed throughout the year, with no significant acquisition activity reported during this period.
Ticker: GLDD Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Great Lakes Dredge & Dock Corp. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Planned sale 10 Dec 2025
Value US$155,178.07 | Price 75.61 | Shares 43,193 (+15.6%)
Proposed sale 10 Dec 2025
Value US$1,545,345.27 | Price 90.03 | Shares 95,377
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2025-12-12 2025-12-10 PlS Planned sale
JOHANSON DAVID

SVP-Project Acquisition & Ops

Officer
43,193 +15.6%
75.61
US$155,178 		43,193 +15.6% 75.61 US$155,178
2025-12-10 2025-12-10 PrS Proposed sale
JOHANSON DAVID

Officer

Officer
95,377
90.03
US$1,545,345 		95,377 90.03 US$1,545,345
2025-12-04 2025-12-03 PlS Planned sale
JOHANSON DAVID

SVP-Project Acquisition & Ops

Officer
40,899 +17.2%
332.85
US$2,171,580 		40,899 +17.2% 332.85 US$2,171,580
2025-12-03 2025-12-03 PrS Proposed sale
JOHANSON DAVID

Officer

Officer
10,000
13.01
US$130,122 		10,000 13.01 US$130,122
2025-08-13 2025-08-11 PlS Planned sale
Kornblau Scott Lee

SVP & CFO

Officer
59,805 -34.8%
11.48
US$686,322 		59,805 -34.8% 11.48 US$686,322
2025-08-11 2025-08-11 PrS Proposed sale
Kornblau Scott Lee

Officer

Officer
59,805
11.48
US$686,583 		59,805 11.48 US$686,583
2025-06-04 2025-06-03 S Sale
2.8
Steger Ronald
Non-Executive Director
5,000 -19.7%
11.59
US$57,925 		5,000 -19.7% 11.59 US$57,925
2025-06-03 2025-06-03 PrS Proposed sale
2.8
Steger Ronald

Director

Non-Executive Director
5,000
11.59
US$57,927 		5,000 11.59 US$57,927
2025-05-08 2025-05-06 PlS Planned sale
BEYKO ELENI

SVP - Offshore Energy

Officer
22,579 -31.1%
10.26
US$231,600 		22,579 -31.1% 10.26 US$231,600
2025-05-06 2025-05-06 PrS Proposed sale
BEYKO ELENI

Officer

Officer
22,579
10.31
US$232,683 		22,579 10.31 US$232,683
2025-03-05 2025-03-04 B Purchase
3.2
GUNSTEN CHRISTOPHER

SVP-Proj Svcs & Fleet Engineer

Officer
3,875 +6.7%
7.75
US$30,031 		3,875 +6.7% 7.75 US$30,031
2024-11-15 2024-11-14 S Sale
3.5
DICKERSON LAWRENCE R
Non-Executive Director
15,936 -16.2%
12.04
US$191,799 		15,936 -16.2% 12.04 US$191,799
2024-11-14 2024-11-14 PrS Proposed sale
3.5
DICKERSON LAWRENCE R

Director

Non-Executive Director
15,936
12.04
US$191,793 		15,936 12.04 US$191,793
2024-11-13 2024-11-12 S Sale
3.5
DICKERSON LAWRENCE R
Non-Executive Director
5,323 -5.1%
12.61
US$67,118 		5,323 -5.1% 12.61 US$67,118
2024-11-12 2024-11-12 PrS Proposed sale
3.5
DICKERSON LAWRENCE R

Director

Non-Executive Director
5,323
12.61
US$67,119 		5,323 12.61 US$67,119
2024-11-12 2024-11-11 PrS Proposed sale
2.8
Steger Ronald

Director

Non-Executive Director
12,000
12.76
US$153,120 		12,000 12.76 US$153,120
2024-11-12 2024-11-11 PrS Proposed sale
3.3
KATHLEEN SHANAHAN FAMILY TRUST

Director

Non-Executive Director
23,238
12.63
US$293,541 		23,238 12.63 US$293,541
2024-11-12 2024-11-11 S Sale
2.8
Steger Ronald
Non-Executive Director
12,000 -32.1%
12.76
US$153,120 		12,000 -32.1% 12.76 US$153,120
2024-11-12 2024-11-11 S Sale
3.3
Shanahan Kathleen M
Non-Executive Director
23,238 -25.6%
12.63
US$293,542 		23,238 -25.6% 12.63 US$293,542
2024-08-26 2024-08-26 PlS Planned sale
0.7
Petterson Lasse

CEO & President

Executive Director
28,709 -3.1%
9.24
US$265,363 		28,709 -3.1% 9.24 US$265,363
2024-08-26 2024-08-23 PlS Planned sale
0.7
Petterson Lasse

CEO & President

Executive Director
46,510 -4.8%
9.08
US$422,306 		46,510 -4.8% 9.08 US$422,306
2024-08-21 2024-08-20 PlS Planned sale
0.7
Petterson Lasse

CEO & President

Executive Director
10,147 -1.0%
9.10
US$92,338 		10,147 -1.0% 9.10 US$92,338
2024-08-21 2024-08-19 PlS Planned sale
0.7
Petterson Lasse

CEO & President

Executive Director
53,771 -5.2%
9.06
US$487,165 		53,771 -5.2% 9.06 US$487,165
2024-08-19 2024-08-16 PlS Planned sale
0.7
Petterson Lasse

CEO & President

Executive Director
51,640 -4.7%
9.11
US$470,440 		51,640 -4.7% 9.11 US$470,440
2024-08-19 2024-08-15 PlS Planned sale
0.7
Petterson Lasse

CEO & President

Executive Director
59,223 -5.1%
9.08
US$537,745 		59,223 -5.1% 9.08 US$537,745
2024-08-15 2024-08-15 PrS Proposed sale
0.7
Petterson Lasse

Officer; Director

Executive Director
250,000
9.00
US$2,250,000 		250,000 9.00 US$2,250,000
2024-05-31 2024-05-31 PrS Proposed sale
2.5
Levenson Ryan

Former Director

Non-Executive Director
18,202
9.15
US$166,574 		18,202 9.15 US$166,574
2024-05-30 2024-05-30 PrS Proposed sale
2.5
Levenson Ryan

Former BOD
20,000
9.02
US$180,349 		20,000 9.02 US$180,349
2024-05-29 2024-05-29 PrS Proposed sale
2.5
Levenson Ryan

Former BOD
15,000
8.98
US$134,763 		15,000 8.98 US$134,763
2024-05-24 2024-05-24 PrS Proposed sale
2.5
Levenson Ryan

Former Director

Non-Executive Director
25,000
9.10
US$227,591 		25,000 9.10 US$227,591
2024-05-23 2024-05-23 PrS Proposed sale
2.5
Levenson Ryan

Former Director

Non-Executive Director
21,160
9.15
US$193,576 		21,160 9.15 US$193,576
2024-05-22 2024-05-22 PrS Proposed sale
2.5
Levenson Ryan

Former Director

Non-Executive Director
19,710
9.26
US$182,512 		19,710 9.26 US$182,512
2023-05-19 2023-05-19 B Purchase
2.5
Levenson Ryan
Non-Executive Director
121,721 +57.4%
6.82
US$830,490 		121,721 +57.4% 6.82 US$830,490
2023-05-19 2023-05-18 B Purchase
2.5
Levenson Ryan
Non-Executive Director
6,860 +3.3%
6.75
US$46,286 		6,860 +3.3% 6.75 US$46,286
2023-05-19 2023-05-17 B Purchase
2.5
Levenson Ryan
Non-Executive Director
5,207 +2.6%
6.64
US$34,552 		5,207 +2.6% 6.64 US$34,552
2023-05-15 2023-05-12 B Purchase
2.5
Levenson Ryan
Non-Executive Director
68,000 +51.5%
6.10
US$414,528 		68,000 +51.5% 6.10 US$414,528
2023-05-12 2023-05-11 B Purchase
2.5
Levenson Ryan
Non-Executive Director
66,000 +99.8%
6.13
US$404,864 		66,000 +99.8% 6.13 US$404,864
2023-05-12 2023-05-10 B Purchase
2.5
Levenson Ryan
Non-Executive Director
66,000 +66000.0%
6.05
US$399,142 		66,000 +66000.0% 6.05 US$399,142
2023-03-03 2023-03-02 B Purchase
2.5
Shipp Earl L
Non-Executive Director
2,000 +15.9%
5.51
US$11,020 		2,000 +15.9% 5.51 US$11,020
2022-08-05 2022-08-05 B Purchase
0.7
Petterson Lasse

CEO & President

Executive Director
10,000 +1.0%
9.65
US$96,540 		10,000 +1.0% 9.65 US$96,540
2022-05-11 2022-05-09 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
17,700 -6.7%
14.12
US$249,938 		17,700 -6.7% 14.12 US$249,938
2022-03-02 2022-02-28 S Sale
2.3
HANSON WILLIAM H

SVP, Gov't Relations & Bus Dev

Officer
1,119 -3.8%
14.06
US$15,734 		1,119 -3.8% 14.06 US$15,734
2021-11-16 2021-11-15 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
2,509 -1.2%
15.85
US$39,760 		2,509 -1.2% 15.85 US$39,760
2021-11-16 2021-11-12 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
2,491 -1.2%
15.83
US$39,423 		2,491 -1.2% 15.83 US$39,423
2021-11-02 2021-11-01 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
3,594 -1.7%
15.41
US$55,394 		3,594 -1.7% 15.41 US$55,394
2021-11-02 2021-10-29 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
1,406 -0.7%
15.25
US$21,442 		1,406 -0.7% 15.25 US$21,442
2021-10-25 2021-10-21 PlS Planned sale
3.5
DICKERSON LAWRENCE R
Non-Executive Director
1,518 -1.7%
14.59
US$22,148 		1,518 -1.7% 14.59 US$22,148
2021-06-16 2021-06-14 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
8,735 -3.5%
14.47
US$126,352 		8,735 -3.5% 14.47 US$126,352
2021-05-05 2021-05-03 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
8,566 -3.3%
16.14
US$138,233 		8,566 -3.3% 16.14 US$138,233
2021-04-28 2021-04-26 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
12,395 -4.6%
15.88
US$196,819 		12,395 -4.6% 15.88 US$196,819
2021-04-21 2021-04-19 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
10,913 -3.9%
15.14
US$165,185 		10,913 -3.9% 15.14 US$165,185
2021-04-14 2021-04-12 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
14,582 -4.9%
15.18
US$221,298 		14,582 -4.9% 15.18 US$221,298
2021-04-14 2021-04-12 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
22,000 -6.9%
15.17
US$333,685 		22,000 -6.9% 15.17 US$333,685
2021-04-13 2021-04-09 PlS Planned sale
3.5
DICKERSON LAWRENCE R
Non-Executive Director
1,571 -1.9%
15.42
US$24,225 		1,571 -1.9% 15.42 US$24,225
2021-03-11 2021-03-09 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
5,864 -2.0%
15.28
US$89,602 		5,864 -2.0% 15.28 US$89,602
2021-03-10 2021-03-08 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
4,252 -1.5%
15.30
US$65,065 		4,252 -1.5% 15.30 US$65,065
2021-03-02 2021-03-01 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
10,000 -3.5%
15.63
US$156,300 		10,000 -3.5% 15.63 US$156,300
2021-03-02 2021-02-26 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
7,500 -2.6%
15.32
US$114,922 		7,500 -2.6% 15.32 US$114,922
2021-02-23 2021-02-22 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
14,999 -4.9%
15.15
US$227,235 		14,999 -4.9% 15.15 US$227,235
2021-02-11 2021-02-08 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
23,024 -6.9%
15.00
US$345,374 		23,024 -6.9% 15.00 US$345,374
2021-01-14 2021-01-12 PlS Planned sale
3.5
DICKERSON LAWRENCE R
Non-Executive Director
1,735 -2.1%
14.30
US$24,810 		1,735 -2.1% 14.30 US$24,810
2021-01-08 2021-01-06 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
20,000 -6.1%
13.82
US$276,400 		20,000 -6.1% 13.82 US$276,400
2021-01-08 2021-01-06 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
36,025 -10.4%
14.27
US$514,098 		36,025 -10.4% 14.27 US$514,098
2020-12-23 2020-12-22 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
4,498 -1.2%
12.50
US$56,245 		4,498 -1.2% 12.50 US$56,245
2020-12-22 2020-12-18 PlS Planned sale
3.0
Simonelli David E

Chief Operating Officer

Officer
8,528 -2.2%
12.22
US$104,204 		8,528 -2.2% 12.22 US$104,204
2020-12-15 2020-12-14 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
9,307 -2.3%
11.44
US$106,491 		9,307 -2.3% 11.44 US$106,491
2020-12-15 2020-12-11 S Sale
1.6
LaVoy Kathleen Mackie

SVP & Chief Legal Officer

Officer
6,015 -4.8%
11.41
US$68,613 		6,015 -4.8% 11.41 US$68,613
2020-12-15 2020-12-11 S Sale
1.6
LaVoy Kathleen Mackie

SVP & Chief Legal Officer

Officer
6,614 -5.0%
11.42
US$75,515 		6,614 -5.0% 11.42 US$75,515
2020-12-15 2020-12-11 S Sale
1.6
LaVoy Kathleen Mackie

SVP & Chief Legal Officer

Officer
10,000 -7.7%
11.41
US$114,068 		10,000 -7.7% 11.41 US$114,068
2020-12-14 2020-12-10 S Sale
2.5
Levenson Ryan
Non-Executive Director
20,139 -99.6%
11.67
US$235,089 		20,139 -99.6% 11.67 US$235,089
2020-12-14 2020-12-10 S Sale
2.5
Levenson Ryan
Non-Executive Director
35,816 -100.0%
11.63
US$416,443 		35,816 -100.0% 11.63 US$416,443
2020-12-14 2020-12-10 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
8,918 -2.2%
11.68
US$104,183 		8,918 -2.2% 11.68 US$104,183
2020-11-30 2020-11-25 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
100 -0.0%
11.47
US$1,147 		100 -0.0% 11.47 US$1,147
2020-11-18 2020-11-17 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
317 -0.1%
11.30
US$3,582 		317 -0.1% 11.30 US$3,582
2020-11-18 2020-11-16 S Sale
3.0
Simonelli David E

Chief Operating Officer

Officer
3,885 -0.9%
11.30
US$43,900 		3,885 -0.9% 11.30 US$43,900
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