Great Lakes Dredge & Dock CORPSEC Filings
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All SEC filings by Great Lakes Dredge & Dock CORP (GLDD) — annual and quarterly reports, current reports, registrations, proxies and ownership forms, updated in real time.
Financials
| 10-K/A | Annual report | View Diff | Mar 6, 2026 | |
| 10-K | Annual report | View Diff | Feb 23, 2026 | |
| 10-Q | Quarterly report | View Diff | Nov 4, 2025 | |
| 10-Q | Quarterly report | View Diff | Aug 5, 2025 | |
| 10-Q | Quarterly report | View Diff | May 6, 2025 | |
| ARS | Annual report to shareholders | Mar 14, 2025 | ||
| 10-K | Annual report | View Diff | Feb 20, 2025 | |
| 10-Q | Quarterly report | View Diff | Nov 5, 2024 | |
| 10-Q | Quarterly report | View Diff | Aug 6, 2024 | |
| 10-Q | Quarterly report | View Diff | May 7, 2024 |
Events
| 8-K | Entry Into a Material Definitive Agreement | Apr 1, 2026 | ||
| 8-K | Departure of Directors or Certain Officers | Mar 20, 2026 | ||
| 8-K | Tender Offer Made in Connection with Parties’ Pending Business Combination Expected to Close Early in the Second Quarter | Mar 18, 2026 | ||
| 8-K | Great Lakes Reports Fourth Quarter and Full Year 2025 Results and the Signing of Two International Offshore Energy Contracts | Feb 23, 2026 | ||
| 8-K | Other Events | Feb 12, 2026 | ||
| 8-K | Entry Into a Material Definitive Agreement | Feb 11, 2026 | ||
| 8-K | Great Lakes Reports Third Quarter 2025 Results | Nov 4, 2025 | ||
| 8-K | Great Lakes Announces Amendment to Upsize and Extend Maturity of Revolving Credit Facility and Repayment of Second Lien Notes | Oct 27, 2025 | ||
| 8-K | Great Lakes Reports Second Quarter 2025 Results | Aug 5, 2025 | ||
| 8-K | Departure of Directors or Certain Officers | May 12, 2025 |
Registrations and Prospectuses
| 15-12G | Securities registration termination | Apr 13, 2026 | ||
| S-8 POS | Registration of securities for employees (post-effective amendment) | Apr 1, 2026 | ||
| S-8 POS | Registration of securities for employees (post-effective amendment) | Apr 1, 2026 | ||
| S-8 POS | Registration of securities for employees (post-effective amendment) | Apr 1, 2026 | ||
| S-8 POS | Registration of securities for employees (post-effective amendment) | Apr 1, 2026 | ||
| S-8 POS | Registration of securities for employees (post-effective amendment) | Apr 1, 2026 | ||
| S-8 POS | Registration of securities for employees (post-effective amendment) | Apr 1, 2026 | ||
| POS AM | Prospectus update (post-effective amendment) | Apr 1, 2026 | ||
| SC 14D9/A | Tender offer solicitation | Apr 1, 2026 | ||
| SC 14D9/A | Tender offer solicitation | Apr 1, 2026 |
Proxies
| DEFA14A | Additional proxy soliciting materials | Mar 26, 2025 | ||
| DEF 14A | Definitive proxy | View Diff | Mar 26, 2025 | |
| DEFA14A | Additional proxy soliciting materials | Mar 27, 2024 | ||
| DEF 14A | Definitive proxy | View Diff | Mar 27, 2024 | |
| PRE 14A | Preliminary proxy | Mar 14, 2024 | ||
| DEFA14A | Additional proxy soliciting materials | Mar 24, 2023 | ||
| DEF 14A | Definitive proxy | View Diff | Mar 24, 2023 | |
| DEFA14A | Additional proxy soliciting materials | Mar 25, 2022 | ||
| DEF 14A | Definitive proxy | View Diff | Mar 25, 2022 | |
| DEFA14A | Additional proxy soliciting materials | Mar 26, 2021 |
Other
| EFFECT | Notice of effectiveness | Apr 3, 2026 | ||
| CT ORDER | Confidential treatment order | Mar 27, 2018 | ||
| UPLOAD | Letter from SEC | Nov 28, 2017 | ||
| CORRESP | Correspondence with SEC | Nov 21, 2017 | ||
| UPLOAD | Letter from SEC | Nov 8, 2017 | ||
| EFFECT | Notice of effectiveness | Aug 17, 2017 | ||
| CORRESP | Correspondence with SEC | Aug 15, 2017 | ||
| UPLOAD | Letter from SEC | Aug 15, 2017 | ||
| CORRESP | Correspondence with SEC | Aug 10, 2017 | ||
| CT ORDER | Confidential treatment order | May 22, 2017 |
Ownership
| SC 13G/A | Beneficial ownership report | Jul 14, 2026 | ||
| SC 13G/A | Beneficial ownership report | May 6, 2026 | ||
| SC 13G | Beneficial ownership report | Apr 30, 2026 | ||
| SC 13G/A | Beneficial ownership report | Apr 28, 2026 | ||
| SC 13G/A | Beneficial ownership report | Apr 9, 2026 | ||
| 4 | Vivienne Schiffer | Apr 1, 2026 | ||
| 4 | Lasse Petterson | Apr 1, 2026 | ||
| 4 | Scott Lee Kornblau | Apr 1, 2026 | ||
| 4 | David Johanson | Apr 1, 2026 | ||
| 4 | William H Hanson | Apr 1, 2026 |