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Private company

GREAT LAKES DREDGE & DOCK CO

American heavy construction other than bldg const - contractors company. Summary from the record

Last updated Oct 21, 2026.

Overview

  • IndustryHeavy Construction Other Than Bldg Const - Contractors1
  • HeadquartersNJ1

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Corporate structure

GREAT LAKES DREDGE & DOCK CO is part of a group headed by Great Lakes Dredge & Dock CORP. 12 entities, 4 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of GREAT LAKES DREDGE & DOCK CO

  • Harvey Partners, LLC Filed SCHEDULE 13G/A on GREAT LAKES DREDGE & DOCK CO, latest May 15, 2026 (3 filings since Feb 14, 2023)
  • Great Lakes Dredge & Dock CORP Houston, Texas
    • GREAT LAKES DREDGE & DOCK CO NJ
    • Drews Services LLC Subsidiary · South Carolina, United States
    • Great Lakes Dredge & Dock (Bahamas) Ltd. Subsidiary · Bahamas
    • Great Lakes Dredge & Dock (UK) Limited Subsidiary · United Kingdom
    • Great Lakes Dredge & Dock do Brasil Ltda. Subsidiary · Brazil
    • Great Lakes Environmental & Infrastructure Solutions, LLC Subsidiary · Delaware, United States
    • Great Lakes U.S. Fleet Management, LLC Subsidiary · Delaware, United States
    • NASDI Holdings, LLC Subsidiary · Delaware, United States
    • Terra Contracting Services, LLC Subsidiary · Delaware, United States
    • Terra Fluid Management, LLC Subsidiary · Delaware, United States

Built from subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; major holders from Schedules 13D and 13G; stakes of 5% or more it reported on Schedules 13D and 13G (1 companies). Each entity in the chart links to its source.

Filings

3 filings to the SEC since October 2021: 3 large holders. The latest 3:

  1. May 15, 2026SCHEDULE 13G/A EDGAR
  2. Feb 14, 2024SC 13G/A EDGAR
  3. Feb 14, 2023SC 13G EDGAR

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

Stakes it holds

GREAT LAKES DREDGE & DOCK CO has told the SEC it owns more than 5% of 1 company, latest first (Schedules 13D and 13G).

Sources

The numbers on this page point here. Each one links to the record it came from.

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