0000950170-25-059442.txt : 20250428 0000950170-25-059442.hdr.sgml : 20250428 20250428181642 ACCESSION NUMBER: 0000950170-25-059442 CONFORMED SUBMISSION TYPE: 4/A PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20250331 FILED AS OF DATE: 20250428 DATE AS OF CHANGE: 20250428 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Shanahan Kathleen M CENTRAL INDEX KEY: 0001292085 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4/A SEC ACT: 1934 Act SEC FILE NUMBER: 001-33225 FILM NUMBER: 25882021 MAIL ADDRESS: STREET 1: 24301 WALDEN CENTER DRIVE CITY: BONITA SPRINGS STATE: FL ZIP: 34134 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Great Lakes Dredge & Dock CORP CENTRAL INDEX KEY: 0001372020 STANDARD INDUSTRIAL CLASSIFICATION: HEAVY CONSTRUCTION OTHER THAN BUILDING CONST - CONTRACTORS [1600] ORGANIZATION NAME: 05 Real Estate & Construction EIN: 205336063 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 9811 KATY FREEWAY STREET 2: SUITE 1200 CITY: HOUSTON STATE: TX ZIP: 77024 BUSINESS PHONE: (346) 359-1010 MAIL ADDRESS: STREET 1: 9811 KATY FREEWAY STREET 2: SUITE 1200 CITY: HOUSTON STATE: TX ZIP: 77024 FORMER COMPANY: FORMER CONFORMED NAME: Great Lakes Dredge & Dock Holdings Corp. DATE OF NAME CHANGE: 20060808 4/A 1 ownership.xml 4/A X0508 4/A 2025-03-31 2025-04-01 0001372020 Great Lakes Dredge & Dock CORP GLDD 0001292085 Shanahan Kathleen M C/O GREAT LAKES DREDGE & DOCK CORP. 9811 KATY FREEWAY, SUITE 1200 HOUSTON TX 77024 true false false false false Deferred Stock Units 2025-03-31 4 A false 2902 0 A Common Stock 2902 8600 D Deferred Stock Units ("DSUs") granted March 31, 2025 and deferred pursuant to the Company's Director Deferral Plan. The DSUs will be payable in common stock on a 1-for-1 basis in three equal annual installments beginning January 15, 2026. This amendment is being filed to correct the number of shares issued. Due to an administrative error, the original filing inadvertently overstated the number of shares. /s/Vivienne R. Schiffer, by Power of Attorney 2025-04-28