| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| JOHANSON DAVID | SVP-Project Acquisition & Ops | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 07 May 2025 | 0001940445 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Tax liability | -$5.22K | -547 | -0.6% | $9.54 | 91.2K | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | -$1.12K | -117 | -0.13% | $9.54 | 91K | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | -$601 | -63 | -0.07% | $9.54 | 91K | 05 May 2025 | Direct | |
| transaction | GLDD | Common Stock | Tax liability | -$935 | -98 | -0.11% | $9.54 | 90.9K | 05 May 2025 | Direct |