| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| BAYER RYAN | VP & CAO | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 12 May 2025 | 0001990270 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Award | +10,126 | +70% | 24,574 | 08 May 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Represents restricted stock units that vest in three equal annual installments beginning on March 15, 2026. |