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

 2/23/22  Great Lakes Dredge & Dock Corp.   10-K       12/31/21   94:16M                                    ActiveDisclosure/FA      
  1/4/22  Levenson Ryan                     4          Director²   1:6K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  1/4/22  Steuert D Michael                 4          Director²   1:4K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  1/4/22  Steger Ronald                     4          Director²   1:4K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  1/4/22  Shipp Earl L                      4          Director²   1:4K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  1/4/22  Shanahan Kathleen M               4          Director²   1:4K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  1/4/22  Dorward-King Elaine J             4          Director²   1:4K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 
  1/4/22  Dickerson Lawrence R              4          Director²   1:4K   Great Lakes Dredge & Dock Corp.   DONNELLEY FIN… File16/FA 

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¹	Filing/Form Types:  -A
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	10-K	Annual Report — Form 10-K.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.