| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Petterson Lasse | CEO & President, Director | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 07 May 2025 | 0001455941 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Tax liability | -$43.3K | -4.54K | -0.44% | $9.54 | 1.03M | 05 May 2025 | Direct |