| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Steger Ronald | Director | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 04 Jun 2025 | 0001616560 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Sale | $57,925 | -5,000 | -20% | $11.58 | 20,404 | 03 Jun 2025 | Direct |