CIK 0001372020
GLDD Great Lakes Dredge & Dock CORP
Insider trading from SEC Form 4. Last filing Mar 25, 2026.
Last 90 days
Net insider value
$0
no open-market trades
Buys
0
$0 by 0 insiders
Sells
0
$0 by 0 insiders
Insiders on file
13
with a Form 4 at this company
Signals
Open-market buys and sells at Great Lakes Dredge & Dock CORP, scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 0Weak | David Johanson SVP-Project Acquisition & Ops sell | $29k 2,100 shares | -2% | - | |
| 6Weak | David Johanson SVP-Project Acquisition & Ops sell | $130k 10,000 shares | -10% | - | |
| 33Weak | Scott Lee Kornblau SVP & CFO sell | $686k 59,805 shares | -35% | - | |
| 27Weak | Ronald Steger director sell | $58k 5,000 shares | -20% | - | |
| 18Weak | Eleni Beyko SVP - Offshore Energy sell | $232k 22,579 shares | -31% | - | |
| 23Weak | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer buy | $30k 3,875 shares | +7% | - | |
| 47Moderate | Lawrence R Dickerson director sell | $192k 15,936 shares | -16% | - | |
| 38Weak | Lawrence R Dickerson director sell | $67k 5,323 shares | -5% | - | |
| 51Moderate | Ronald Steger director sell | $153k 12,000 shares | -32% | - | |
| 54Moderate | Kathleen M Shanahan director sell | $294k 23,238 shares | -26% | - |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Nov 14, 2024 | DICKERSON LAWRENCE R Director | 15,936 0.02% of outstanding | $192k | Nov 14, 2024 | $67k |
| Nov 12, 2024 | DICKERSON LAWRENCE R Director | 5,323 0.01% of outstanding | $67k | Nov 12, 2024 | none |
Transactions
The last 100 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| May 8, 2025 | Eleni Beyko SVP - Offshore Energy | AGrant or award Common Stock | +15,376 | - | - | 105,514 | Mar 25, 2026 |
| May 8, 2025 | Lasse Petterson CEO & President | AGrant or award Common Stock | +125,145 | - | - | 1,159,377 | Mar 25, 2026 |
| May 8, 2025 | Vivienne Schiffer SVP, CLO, CCO & Corp Secretary | AGrant or award Common Stock | +18,035 | - | - | 82,181 | Mar 25, 2026 |
| May 8, 2025 | Ryan Bayer VP & CAO | AGrant or award Common Stock | +10,126 | - | - | 24,574 | Mar 25, 2026 |
| May 8, 2025 | Scott Lee Kornblau SVP & CFO | AGrant or award Common Stock | +25,058 | - | - | 171,935 | Mar 25, 2026 |
| May 8, 2025 | William H Hanson SVP, Market Development | AGrant or award Common Stock | +8,237 | - | - | 68,977 | Mar 25, 2026 |
| May 8, 2025 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | AGrant or award Common Stock | +13,179 | - | - | 85,952 | Mar 25, 2026 |
| Dec 31, 2025 | Eleni Beyko SVP - Offshore Energy | FTax withholding Common Stock | -8,088 | $13.12 | $106k | 125,807 | Mar 25, 2026 |
| May 8, 2025 | David Johanson SVP-Project Acquisition & Ops | AGrant or award Common Stock | +13,179 | - | - | 104,063 | Mar 25, 2026 |
| Mar 16, 2026 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | FTax withholding Common Stock | -2,204 | $16.93 | $37k | 97,736 | Mar 18, 2026 |
| Mar 16, 2026 | Ryan Bayer VP & CAO | FTax withholding Common Stock | -1,282 | $16.93 | $22k | 30,457 | Mar 18, 2026 |
| Mar 16, 2026 | David Johanson SVP-Project Acquisition & Ops | FTax withholding Common Stock | -1,659 | $16.93 | $28k | 104,292 | Mar 18, 2026 |
| Mar 16, 2026 | Vivienne Schiffer SVP, CLO, CCO & Corp Secretary | FTax withholding Common Stock | -2,060 | $16.93 | $35k | 99,270 | Mar 18, 2026 |
| Mar 16, 2026 | William H Hanson SVP, Market Development | FTax withholding Common Stock | -1,030 | $16.93 | $17k | 67,956 | Mar 18, 2026 |
| Mar 16, 2026 | Eleni Beyko SVP - Offshore Energy | FTax withholding Common Stock | -2,645 | $16.93 | $45k | 119,189 | Mar 18, 2026 |
| Mar 16, 2026 | Scott Lee Kornblau SVP & CFO | FTax withholding Common Stock | -4,719 | $16.93 | $80k | 134,014 | Mar 18, 2026 |
| Mar 16, 2026 | Lasse Petterson CEO & President | AGrant or award Common Stock | +94,540 | - | - | 1,386,742 | Mar 18, 2026 |
| Mar 16, 2026 | Ryan Bayer VP & CAO | AGrant or award Common Stock | +2,170 | - | - | 32,627 | Mar 18, 2026 |
| Mar 16, 2026 | Lasse Petterson CEO & President | FTax withholding Common Stock | -37,202 | $16.93 | $630k | 1,349,540 | Mar 18, 2026 |
| Mar 16, 2026 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | AGrant or award Common Stock | +12,646 | - | - | 110,382 | Mar 18, 2026 |
| Mar 16, 2026 | Vivienne Schiffer SVP, CLO, CCO & Corp Secretary | AGrant or award Common Stock | +14,213 | - | - | 113,483 | Mar 18, 2026 |
| Mar 16, 2026 | Eleni Beyko SVP - Offshore Energy | AGrant or award Common Stock | +14,754 | - | - | 133,943 | Mar 18, 2026 |
| Mar 16, 2026 | David Johanson SVP-Project Acquisition & Ops | AGrant or award Common Stock | +12,646 | - | - | 116,938 | Mar 18, 2026 |
| Mar 16, 2026 | William H Hanson SVP, Market Development | AGrant or award Common Stock | +7,853 | - | - | 75,809 | Mar 18, 2026 |
| Mar 16, 2026 | Scott Lee Kornblau SVP & CFO | AGrant or award Common Stock | +22,265 | - | - | 156,279 | Mar 18, 2026 |
| Mar 16, 2026 | Lasse Petterson CEO & President | FTax withholding Common Stock | -20,033 | $16.93 | $339k | 1,329,507 | Mar 18, 2026 |
| Mar 16, 2026 | William H Hanson SVP, Market Development | FTax withholding Common Stock | -1,913 | $16.93 | $32k | 73,896 | Mar 18, 2026 |
| Mar 16, 2026 | Eleni Beyko SVP - Offshore Energy | FTax withholding Common Stock | -4,773 | $16.93 | $81k | 129,170 | Mar 18, 2026 |
| Mar 16, 2026 | Vivienne Schiffer SVP, CLO, CCO & Corp Secretary | FTax withholding Common Stock | -3,461 | $16.93 | $59k | 110,022 | Mar 18, 2026 |
| Mar 16, 2026 | Ryan Bayer VP & CAO | FTax withholding Common Stock | -854 | $16.93 | $14k | 31,773 | Mar 18, 2026 |
| Mar 16, 2026 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | FTax withholding Common Stock | -4,091 | $16.93 | $69k | 106,291 | Mar 18, 2026 |
| Mar 16, 2026 | David Johanson SVP-Project Acquisition & Ops | FTax withholding Common Stock | -3,080 | $16.93 | $52k | 113,858 | Mar 18, 2026 |
| Mar 16, 2026 | Scott Lee Kornblau SVP & CFO | FTax withholding Common Stock | -8,762 | $16.93 | $148k | 147,517 | Mar 18, 2026 |
| Mar 16, 2026 | Lasse Petterson CEO & President | FTax withholding Common Stock | -15,529 | $16.93 | $263k | 1,313,978 | Mar 18, 2026 |
| Mar 16, 2026 | William H Hanson SVP, Market Development | FTax withholding Common Stock | -639 | $16.93 | $11k | 73,257 | Mar 18, 2026 |
| Mar 16, 2026 | Vivienne Schiffer SVP, CLO, CCO & Corp Secretary | FTax withholding Common Stock | -2,058 | $16.93 | $35k | 107,964 | Mar 18, 2026 |
| Mar 16, 2026 | David Johanson SVP-Project Acquisition & Ops | FTax withholding Common Stock | -1,029 | $16.93 | $17k | 112,829 | Mar 18, 2026 |
| Mar 16, 2026 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | FTax withholding Common Stock | -1,367 | $16.93 | $23k | 104,924 | Mar 18, 2026 |
| Mar 16, 2026 | Eleni Beyko SVP - Offshore Energy | FTax withholding Common Stock | -1,939 | $16.93 | $33k | 127,231 | Mar 18, 2026 |
| Mar 16, 2026 | Scott Lee Kornblau SVP & CFO | FTax withholding Common Stock | -2,926 | $16.93 | $50k | 144,591 | Mar 18, 2026 |
| Mar 16, 2026 | Scott Lee Kornblau SVP & CFO | AGrant or award Common Stock | +14,868 | - | - | 159,459 | Mar 18, 2026 |
| Mar 16, 2026 | Eleni Beyko SVP - Offshore Energy | AGrant or award Common Stock | +9,852 | - | - | 137,083 | Mar 18, 2026 |
| Mar 16, 2026 | Lasse Petterson CEO & President | AGrant or award Common Stock | +78,924 | - | - | 1,392,902 | Mar 18, 2026 |
| Mar 16, 2026 | William H Hanson SVP, Market Development | AGrant or award Common Stock | +5,242 | - | - | 78,499 | Mar 18, 2026 |
| Mar 16, 2026 | Vivienne Schiffer SVP, CLO, CCO & Corp Secretary | AGrant or award Common Stock | +10,454 | - | - | 118,418 | Mar 18, 2026 |
| Mar 16, 2026 | David Johanson SVP-Project Acquisition & Ops | AGrant or award Common Stock | +8,444 | - | - | 121,273 | Mar 18, 2026 |
| Mar 16, 2026 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | AGrant or award Common Stock | +8,444 | - | - | 113,368 | Mar 18, 2026 |
| Mar 16, 2026 | Scott Lee Kornblau SVP & CFO | FTax withholding Common Stock | -5,851 | $16.93 | $99k | 153,608 | Mar 18, 2026 |
| Mar 16, 2026 | Eleni Beyko SVP - Offshore Energy | FTax withholding Common Stock | -3,188 | $16.93 | $54k | 133,895 | Mar 18, 2026 |
| Mar 16, 2026 | Lasse Petterson CEO & President | FTax withholding Common Stock | -31,057 | $16.93 | $526k | 1,361,845 | Mar 18, 2026 |
| Mar 16, 2026 | William H Hanson SVP, Market Development | FTax withholding Common Stock | -1,277 | $16.93 | $22k | 77,222 | Mar 18, 2026 |
| Mar 16, 2026 | Vivienne Schiffer SVP, CLO, CCO & Corp Secretary | FTax withholding Common Stock | -2,546 | $16.93 | $43k | 115,872 | Mar 18, 2026 |
| Mar 16, 2026 | David Johanson SVP-Project Acquisition & Ops | FTax withholding Common Stock | -2,057 | $16.93 | $35k | 119,216 | Mar 18, 2026 |
| Mar 16, 2026 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | FTax withholding Common Stock | -2,732 | $16.93 | $46k | 110,636 | Mar 18, 2026 |
| Feb 23, 2026 | Ryan Bayer VP & CAO | AGrant or award Common Stock | +7,165 | - | - | 31,739 | Feb 25, 2026 |
| Feb 23, 2026 | Eleni Beyko SVP - Offshore Energy | AGrant or award Common Stock | +16,320 | - | - | 121,834 | Feb 25, 2026 |
| Feb 23, 2026 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | AGrant or award Common Stock | +13,988 | - | - | 99,940 | Feb 25, 2026 |
| Feb 23, 2026 | William H Hanson SVP, Market Development | AGrant or award Common Stock | +9 | - | - | 68,986 | Feb 25, 2026 |
| Feb 23, 2026 | David Johanson SVP-Project Acquisition & Ops | AGrant or award Common Stock | +13,988 | - | - | 105,951 | Feb 25, 2026 |
| Feb 23, 2026 | Scott Lee Kornblau SVP & CFO | AGrant or award Common Stock | +26,603 | - | - | 138,733 | Feb 25, 2026 |
| Feb 23, 2026 | Lasse Petterson CEO & President | AGrant or award Common Stock | +132,825 | - | - | 1,292,202 | Feb 25, 2026 |
| Feb 23, 2026 | Vivienne Schiffer SVP, CLO, CCO & Corp Secretary | AGrant or award Common Stock | +19,149 | - | - | 101,330 | Feb 25, 2026 |
| Jan 15, 2026 | Kathleen M Shanahan director | MOption exercise Common Stock | +2,849 | $0.00 | $0 | 73,373 | Jan 20, 2026 |
| Jan 15, 2026 | Kathleen M Shanahan director | MOption exercise Common Stock | +3,002 | $0.00 | $0 | 76,375 | Jan 20, 2026 |
| Jan 15, 2026 | Kathleen M Shanahan director | MOption exercise Deferred Stock Unitsderivative | -2,849 | $0.00 | $0 | 11,853 | Jan 20, 2026 |
| Jan 15, 2026 | Kathleen M Shanahan director | MOption exercise Deferred Stock Unitsderivative | -3,002 | $0.00 | $0 | 8,851 | Jan 20, 2026 |
| Dec 31, 2025 | Dana A Armstrong director | AGrant or award Common Stock | +1,829 | $0.00 | $0 | 8,436 | Jan 5, 2026 |
| Dec 31, 2025 | Earl L Shipp director | AGrant or award Common Stock | +1,829 | $0.00 | $0 | 42,619 | Jan 5, 2026 |
| Dec 31, 2025 | Lawrence R Dickerson director | AGrant or award Deferred Stock Unitsderivative | +3,806 | $0.00 | $0 | 74,024 | Jan 5, 2026 |
| Dec 31, 2025 | Ronald Steger director | AGrant or award Deferred Stock Unitsderivative | +2,106 | $0.00 | $0 | 43,443 | Jan 5, 2026 |
| Dec 31, 2025 | Kathleen M Shanahan director | AGrant or award Deferred Stock Unitsderivative | +1,925 | $0.00 | $0 | 14,702 | Jan 5, 2026 |
| Dec 10, 2025 | David Johanson SVP-Project Acquisition & Ops | SOpen-market sale Common Stock10b5-1 | -2,100 | $13.96 | $29k | 91,963 | Dec 12, 2025 |
| Dec 3, 2025 | David Johanson SVP-Project Acquisition & Ops | SOpen-market sale Common Stock10b5-1 | -10,000 | $13.02 | $130k | 94,063 | Dec 4, 2025 |
| Sep 30, 2025 | Dana A Armstrong director | AGrant or award Common Stock | +2,002 | $0.00 | $0 | 6,607 | Oct 1, 2025 |
| Sep 30, 2025 | Earl L Shipp director | AGrant or award Common Stock | +2,002 | $0.00 | $0 | 40,790 | Oct 1, 2025 |
| Sep 30, 2025 | Lawrence R Dickerson director | AGrant or award Deferred Stock Unitsderivative | +4,165 | $0.00 | $0 | 70,218 | Oct 1, 2025 |
| Sep 30, 2025 | Kathleen M Shanahan director | AGrant or award Deferred Stock Unitsderivative | +2,106 | $0.00 | $0 | 12,777 | Oct 1, 2025 |
| Sep 30, 2025 | Ronald Steger director | AGrant or award Deferred Stock Unitsderivative | +2,304 | $0.00 | $0 | 41,337 | Oct 1, 2025 |
| Aug 11, 2025 | Scott Lee Kornblau SVP & CFO | SOpen-market sale Common Stock10b5-1 | -59,805 | $11.48 | $686k | 112,130 | Aug 13, 2025 |
| Jun 30, 2025 | Dana A Armstrong director | AGrant or award Common Stock | +1,969 | $0.00 | $0 | 4,605 | Jul 1, 2025 |
| Jun 30, 2025 | Earl L Shipp director | AGrant or award Common Stock | +1,969 | $0.00 | $0 | 38,788 | Jul 1, 2025 |
| Jun 30, 2025 | Lawrence R Dickerson director | AGrant or award Deferred Stock Unitsderivative | +4,097 | $0.00 | $0 | 66,053 | Jul 1, 2025 |
| Jun 30, 2025 | Kathleen M Shanahan director | AGrant or award Deferred Stock Unitsderivative | +2,071 | $0.00 | $0 | 10,671 | Jul 1, 2025 |
| Jun 30, 2025 | Ronald Steger director | AGrant or award Deferred Stock Unitsderivative | +2,266 | $0.00 | $0 | 39,033 | Jul 1, 2025 |
| Jun 3, 2025 | Ronald Steger director | SOpen-market sale Common Stock | -5,000 | $11.59 | $58k | 20,404 | Jun 4, 2025 |
| May 8, 2025 | Ryan Bayer VP & CAO | AGrant or award Common Stock | +10,126 | - | - | 24,574 | May 12, 2025 |
| May 8, 2025 | Eleni Beyko SVP - Offshore Energy | AGrant or award Common Stock | +15,376 | - | - | 105,514 | May 12, 2025 |
| May 8, 2025 | Eleni Beyko SVP - Offshore Energy | AGrant or award Common Stock | +25,000 | - | - | 75,138 | May 12, 2025 |
| May 8, 2025 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | AGrant or award Common Stock | +13,179 | - | - | 85,952 | May 12, 2025 |
| May 8, 2025 | William H Hanson SVP, Market Development | AGrant or award Common Stock | +8,237 | - | - | 68,977 | May 12, 2025 |
| May 8, 2025 | David Johanson SVP-Project Acquisition & Ops | AGrant or award Common Stock | +13,179 | - | - | 104,063 | May 12, 2025 |
| May 8, 2025 | Vivienne Schiffer SVP, CLO, CCO & Corp Secretary | AGrant or award Common Stock | +18,035 | - | - | 82,181 | May 12, 2025 |
| May 8, 2025 | Scott Lee Kornblau SVP & CFO | AGrant or award Common Stock | +25,058 | - | - | 171,935 | May 12, 2025 |
| May 8, 2025 | Lasse Petterson CEO & President | AGrant or award Common Stock | +125,145 | - | - | 1,159,377 | May 12, 2025 |
| May 8, 2025 | Eleni Beyko SVP - Offshore Energy | AGrant or award Common Stock | +15,000 | - | - | 90,138 | May 12, 2025 |
| May 6, 2025 | Eleni Beyko SVP - Offshore Energy | SOpen-market sale Common Stock10b5-1 | -22,579 | $10.26 | $232k | 50,138 | May 8, 2025 |
| May 5, 2025 | David Johanson SVP-Project Acquisition & Ops | FTax withholding Common Stock | -547 | $9.54 | $5,218 | 91,162 | May 7, 2025 |
| May 5, 2025 | William H Hanson SVP, Market Development | FTax withholding Common Stock | -366 | $9.54 | $3,492 | 60,974 | May 7, 2025 |
| May 5, 2025 | Christopher Gunsten SVP-Proj Svcs & Fleet Engineer | FTax withholding Common Stock | -129 | $9.54 | $1,231 | 73,566 | May 7, 2025 |
| May 5, 2025 | Eleni Beyko SVP - Offshore Energy | FTax withholding Common Stock | -28 | $9.54 | $267 | 74,147 | May 7, 2025 |
Insiders
Everyone who has filed a Form 4 here.
- Dana A Armstrongofficer, director
- Ryan BayerVP & CAO
- Eleni BeykoSVP - Offshore Energy
- Lawrence R Dickersondirector
- Christopher GunstenSVP-Proj Svcs & Fleet Engineer
- William H HansonSVP, Market Development
- David JohansonSVP-Project Acquisition & Ops
- Scott Lee KornblauSVP & CFO
- Lasse PettersonCEO & President
- Vivienne SchifferSVP, CLO, CCO & Corp Secretary
- Kathleen M Shanahandirector
- Earl L Shippdirector
- Ronald Stegerdirector
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.