Schiffer Vivienne (CIK 1835547) reported 13 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-04-01). Recent activity: Buy GLDD (28,945 shares), Sell GLDD (144,817 shares), Buy GLDD (18,035 shares), Sell GLDD (2,060 shares), Buy GLDD (14,213 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-01 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Buy | 28,945 | $0 |
| 2026-04-01 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Sell | 144,817 | $0 |
| 2026-03-25 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Buy | 18,035 | $0 |
| 2026-03-18 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Sell | 2,060 | $34,876 |
| 2026-03-18 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Buy | 14,213 | $0 |
| 2026-03-18 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Sell | 3,461 | $58,595 |
| 2026-03-18 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Sell | 2,058 | $34,842 |
| 2026-03-18 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Buy | 10,454 | $0 |
| 2026-03-18 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Sell | 2,546 | $43,104 |
| 2026-02-25 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Buy | 19,149 | $0 |
| 2025-05-12 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Buy | 18,035 | $0 |
| 2025-05-07 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Sell | 1,070 | $10,208 |
| 2025-05-07 | Great Lakes Dredge & Dock CORP (GLDD) | SVP, CLO, CCO & Corp Secretary | Sell | 683 | $6,516 |
来源：SEC Form 4 申报文件 · 截至 2026-04-01