As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 5/14/24  Great Lakes Dredge & Dock Corp.   8-K:5       5/13/24    8:248K                                   Donnelley … Solutions/FA 
 5/13/24  Great Lakes Dredge & Dock Corp.   8-K:5        5/9/24    8:285K                                   Donnelley … Solutions/FA 
  5/7/24  Great Lakes Dredge & Dock Corp.   10-Q        3/31/24   51:5.1M                                   Donnelley … Solutions/FA 
  5/7/24  Schiffer Vivienne                 4          Officer²    1:4K   Great Lakes Dredge & Dock Corp.   Donnelley … Solutions/FA 
  5/7/24  Petterson Lasse                   4          Dir.,Off.²  1:4K   Great Lakes Dredge & Dock Corp.   Donnelley … Solutions/FA 
  5/7/24  Kornblau Scott Lee                4          Officer²    1:4K   Great Lakes Dredge & Dock Corp.   Donnelley … Solutions/FA 
  5/7/24  Johanson David                    4          Officer²    1:4K   Great Lakes Dredge & Dock Corp.   Donnelley … Solutions/FA 
  5/7/24  Hanson William H                  4          Officer²    1:4K   Great Lakes Dredge & Dock Corp.   Donnelley … Solutions/FA 
  5/7/24  Gunsten Christopher               4          Officer²    1:4K   Great Lakes Dredge & Dock Corp.   Donnelley … Solutions/FA 
  5/7/24  Beyko Eleni                       4          Officer²    1:4K   Great Lakes Dredge & Dock Corp.   Donnelley … Solutions/FA 
  5/7/24  Great Lakes Dredge & Dock Corp.   8-K:2,9      5/7/24   12:279K                                   Globenewswire Inc./FA    
 4/29/24  Kornblau Scott Lee                4          Officer²    1:5K   Great Lakes Dredge & Dock Corp.   Donnelley … Solutions/FA 
 4/25/24  Beyko Eleni                       4          Officer²    1:4K   Great Lakes Dredge & Dock Corp.   Donnelley … Solutions/FA 
 4/25/24  Great Lakes Dredge & Dock Corp.   8-K:1,9     4/24/24   10:4M                                     Donnelley … Solutions/FA 
  4/1/24  Shanahan Kathleen M               4          Director²   1:5K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  4/1/24  Levenson Ryan                     4          Director²   1:6K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  4/1/24  Steger Ronald                     4          Director²   1:5K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  4/1/24  Steuert D Michael                 4          Director²   1:4K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  4/1/24  Shipp Earl L                      4          Director²   1:4K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  4/1/24  Dickerson Lawrence R              4          Director²   1:4K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 

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¹	Filing/Form Types:  -K
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	10-Q	Quarterly Report — Form 10-Q.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.