| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| BAYER RYAN | VP & CAO | C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON | /s/Vivienne R. Schiffer, by Power of Attorney | 18 Mar 2026 | 0001990270 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GLDD | Common Stock | Tax liability | -1,282 | -4% | $16.93* | 30,457 | 16 Mar 2026 | Direct | ||
| transaction | GLDD | Common Stock | Award | +2,170 | +7.1% | 32,627 | 16 Mar 2026 | Direct | F1 | ||
| transaction | GLDD | Common Stock | Tax liability | -854 | -2.6% | $16.93* | 31,773 | 16 Mar 2026 | Direct |
| Id | Content |
|---|---|
| F1 | Represents shares awarded pursuant to satisfaction of performance conditions per the terms of Mr. Bayer's performance-based restricted stock units granted on March 15, 2024. |