<SEC-DOCUMENT>0000950170-23-009731-index.html : 20230324
<SEC-HEADER>0000950170-23-009731.hdr.sgml : 20230324
<ACCEPTANCE-DATETIME>20230324161209
ACCESSION NUMBER:		0000950170-23-009731
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20230324
DATE AS OF CHANGE:		20230324

FILER:

	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]
		IRS NUMBER:				205336063
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33225
		FILM NUMBER:		23759990

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>gldd_2023_defa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: gldd_2023_defa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>img151656124_0.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: img151656124_0.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>img151656124_1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: img151656124_1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>img151656124_2.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: img151656124_2.jpg

</DOCUMENT>
</SEC-DOCUMENT>