| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Shipp Earl L | Director | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, STE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 01 Jul 2025 | 0001721123 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Award | $0 | +1,969 | +5.3% | $0.000000 | 38,788 | 30 Jun 2025 | Direct |