| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Kornblau Scott Lee | SVP & CFO | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 07 May 2025 | 0001724302 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Tax liability | $15,989 | -1,676 | -1.1% | $9.54 | 147,947 | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | $10,208 | -1,070 | -0.72% | $9.54 | 146,877 | 05 May 2025 | Direct |