| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| GUNSTEN CHRISTOPHER | SVP-Proj Svcs & Fleet Engineer | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 07 May 2025 | 0001939594 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Tax liability | $1,231 | -129 | -0.18% | $9.54 | 73,566 | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | $5,753 | -603 | -0.82% | $9.54 | 72,963 | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | $706 | -74 | -0.1% | $9.54 | 72,889 | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | $1,107 | -116 | -0.16% | $9.54 | 72,773 | 05 May 2025 | Direct |