| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Schiffer Vivienne | SVP, CLO, CCO & Corp Secretary | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | Vivienne R. Schiffer | 12 May 2025 | 0001835547 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Award | +18,035 | +28% | 82,181 | 08 May 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Represents restricted stock units that vest in three equal annual installments beginning on March 15, 2026. |