| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| BEYKO ELENI | SVP - Offshore Energy | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 07 May 2025 | 0001929993 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Tax liability | $267 | -28 | -0.04% | $9.54 | 74,147 | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | $420 | -44 | -0.06% | $9.54 | 74,103 | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | $8,071 | -846 | -1.1% | $9.54 | 73,257 | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | $5,152 | -540 | -0.74% | $9.54 | 72,717 | 05 May 2025 | Direct |