| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| HANSON WILLIAM H | SVP, Market Development | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 07 May 2025 | 0001808410 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Tax liability | $3,492 | -366 | -0.6% | $9.54 | 60,974 | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | $2,232 | -234 | -0.38% | $9.54 | 60,740 | 05 May 2025 | Direct |