🕵️ Great Lakes Dredge & DOCK Corp ($GLDD)
SEC insider & ownership activity, last 12 months · CIK 1372020 · every row links its SEC filing
Over the last 12 months insiders sold $159K with no open-market buying against it. Johanson David sold $159K through a 10b5-1 trading plan in 2 lots (Dec). BlackRock, Inc. trimmed 9.9% → 8.2%; Prudential Financial Inc trimmed 7.9% → 6.3%. One red-flag 8-K in the window: Delisting notice (3.01), Apr 1, 2026.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 1 seller, $159K (2 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Johanson David | 0 | – | 2 | $159K | Dec 10, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.2% | 13G | Apr 28, 2026 | filing ↗ | |
| Prudential Financial Inc | 6.3% | 13G | Nov 7, 2025 | filing ↗ | |
| Vanguard Capital Management | 5.0% | 13G | Apr 30, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Johanson David | $29K | Dec 10, 2025 | filing ↗ |
| Johanson David | $130K | Dec 3, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Material agreement (1.01) | Apr 1, 2026 | filing ↗ |
| Agreement terminated (1.02) | Apr 1, 2026 | filing ↗ |
| Acquisition or disposition (2.01) | Apr 1, 2026 | filing ↗ |
| Delisting notice (3.01) | Apr 1, 2026 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Apr 1, 2026 | filing ↗ |
| Change of control (5.01) | Apr 1, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 1, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Apr 1, 2026 | filing ↗ |
| Other events (8.01) | Apr 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 1, 2026 | filing ↗ |
| Other events (8.01) | Mar 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 18, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 17, 2026 | filing ↗ |
| Earnings (2.02) | Feb 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 23, 2026 | filing ↗ |
| Other events (8.01) | Feb 12, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 10, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 10, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 10, 2026 | filing ↗ |
| Earnings (2.02) | Nov 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 4, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 24, 2025 | filing ↗ |