Great Lakes Dredge & Dock CORP — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| JOHANSON DAVID | SVP-Project Acquisition & Ops | Sale | 2,100 | $13.96 | $29,316 | 91,963 | Dec 10, 2025 |
| JOHANSON DAVID | SVP-Project Acquisition & Ops | Sale | 10,000 | $13.02 | $130,200 | 94,063 | Dec 3, 2025 |
| Shipp Earl L | — | Award / Grant | 2,002 | — | — | 40,790 | Sep 30, 2025 |
| Armstrong Dana A | — | Award / Grant | 2,002 | — | — | 6,607 | Sep 30, 2025 |
| Kornblau Scott Lee | SVP & CFO | Sale | 59,805 | $11.48 | $686,561 | 112,130 | Aug 11, 2025 |
| Shipp Earl L | — | Award / Grant | 1,969 | — | — | 38,788 | Jun 30, 2025 |
| Armstrong Dana A | — | Award / Grant | 1,969 | — | — | 4,605 | Jun 30, 2025 |
| Steger Ronald | — | Sale | 5,000 | $11.59 | $57,950 | 20,404 | Jun 3, 2025 |
| BEYKO ELENI | SVP - Offshore Energy | Award / Grant | 15,000 | — | — | 90,138 | May 8, 2025 |
| Petterson Lasse | CEO & President | Award / Grant | 125,145 | — | — | 1,159,377 | May 8, 2025 |
| Kornblau Scott Lee | SVP & CFO | Award / Grant | 25,058 | — | — | 171,935 | May 8, 2025 |
| Schiffer Vivienne | SVP, CLO, CCO & Corp Secretary | Award / Grant | 18,035 | — | — | 82,181 | May 8, 2025 |
| GUNSTEN CHRISTOPHER | SVP-Proj Svcs & Fleet Engineer | Award / Grant | 13,179 | — | — | 85,952 | May 8, 2025 |
| JOHANSON DAVID | SVP-Project Acquisition & Ops | Award / Grant | 13,179 | — | — | 104,063 | May 8, 2025 |
| HANSON WILLIAM H | SVP, Market Development | Award / Grant | 8,237 | — | — | 68,977 | May 8, 2025 |
| BEYKO ELENI | SVP - Offshore Energy | Award / Grant | 15,376 | — | — | 105,514 | May 8, 2025 |
| BAYER RYAN | VP & CAO | Award / Grant | 10,126 | — | — | 24,574 | May 8, 2025 |
| BEYKO ELENI | SVP - Offshore Energy | Sale | 22,579 | $10.26 | $231,661 | 50,138 | May 6, 2025 |
| Schiffer Vivienne | SVP, CLO, CCO & Corp Secretary | Tax Withholding | 1,070 | $9.54 | $10,208 | 64,829 | May 5, 2025 |
| Petterson Lasse | CEO & President | Tax Withholding | 4,541 | $9.54 | $43,321 | 1,034,232 | May 5, 2025 |
| Kornblau Scott Lee | SVP & CFO | Tax Withholding | 1,676 | $9.54 | $15,989 | 147,947 | May 5, 2025 |
| JOHANSON DAVID | SVP-Project Acquisition & Ops | Tax Withholding | 547 | $9.54 | $5,218 | 91,162 | May 5, 2025 |
| HANSON WILLIAM H | SVP, Market Development | Tax Withholding | 234 | $9.54 | $2,232 | 60,740 | May 5, 2025 |
| GUNSTEN CHRISTOPHER | SVP-Proj Svcs & Fleet Engineer | Tax Withholding | 603 | $9.54 | $5,753 | 72,963 | May 5, 2025 |
| BEYKO ELENI | SVP - Offshore Energy | Tax Withholding | 540 | $9.54 | $5,152 | 72,717 | May 5, 2025 |
| BEYKO ELENI | SVP - Offshore Energy | Tax Withholding | 8,088 | $9.06 | $73,277 | 74,175 | Apr 24, 2025 |
| STEUERT D MICHAEL | — | Award / Grant | 2,759 | — | — | 89,209 | Mar 31, 2025 |
| Shipp Earl L | — | Award / Grant | 2,759 | — | — | 36,819 | Mar 31, 2025 |
| Armstrong Dana A | — | Award / Grant | 2,636 | — | — | 2,636 | Mar 31, 2025 |
| Armstrong Dana A | — | Award / Grant | 4,833 | — | — | 4,833 | Mar 31, 2025 |
| Shipp Earl L | — | Award / Grant | 5,057 | — | — | 39,117 | Mar 31, 2025 |
| STEUERT D MICHAEL | — | Award / Grant | 5,057 | — | — | 91,507 | Mar 31, 2025 |
| Schiffer Vivienne | SVP, CLO, CCO & Corp Secretary | Tax Withholding | 1,864 | $8.70 | $16,217 | 48,681 | Mar 17, 2025 |
| Petterson Lasse | CEO & President | Tax Withholding | 20,033 | $8.70 | $174,287 | 975,773 | Mar 17, 2025 |
| Kornblau Scott Lee | SVP & CFO | Tax Withholding | 11,805 | $8.70 | $102,703 | 149,623 | Mar 17, 2025 |
| JOHANSON DAVID | SVP-Project Acquisition & Ops | Tax Withholding | 1,658 | $8.70 | $14,425 | 76,930 | Mar 17, 2025 |
| HANSON WILLIAM H | SVP, Market Development | Award / Grant | 5,216 | — | — | 62,611 | Mar 17, 2025 |
| GUNSTEN CHRISTOPHER | SVP-Proj Svcs & Fleet Engineer | Award / Grant | 8,402 | — | — | 75,993 | Mar 17, 2025 |
| BEYKO ELENI | SVP - Offshore Energy | Tax Withholding | 4,716 | $8.70 | $41,029 | 77,226 | Mar 17, 2025 |
| BAYER RYAN | VP & CAO | Tax Withholding | 456 | $8.70 | $3,967 | 16,379 | Mar 17, 2025 |
| GUNSTEN CHRISTOPHER | SVP-Proj Svcs & Fleet Engineer | Purchase | 3,875 | $7.75 | $30,031 | 61,532 | Mar 4, 2025 |
| Shanahan Kathleen M | — | Option Exercise | 2,849 | — | — | 70,524 | Jan 15, 2025 |
| STEUERT D MICHAEL | — | Award / Grant | 1,772 | — | — | 86,450 | Dec 31, 2024 |
| Shipp Earl L | — | Award / Grant | 1,771 | — | — | 34,060 | Dec 31, 2024 |
| DICKERSON LAWRENCE R | — | Award / Grant | 4,069 | — | — | 86,217 | Dec 31, 2024 |
| DICKERSON LAWRENCE R | — | Sale | 15,936 | $12.04 | $191,869 | 82,148 | Nov 14, 2024 |
| DICKERSON LAWRENCE R | — | Sale | 5,323 | $12.61 | $67,123 | 98,084 | Nov 12, 2024 |
| Shanahan Kathleen M | — | Sale | 23,238 | $12.63 | $293,496 | 67,675 | Nov 11, 2024 |
| Steger Ronald | — | Sale | 12,000 | $12.76 | $153,120 | 25,404 | Nov 11, 2024 |
| STEUERT D MICHAEL | — | Award / Grant | 1,899 | — | — | 84,678 | Sep 30, 2024 |