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Insider Ownership

Insider Trading & Ownership of Vivienne R. Schiffer

Location: Oakbrook Terrace, IL
Summary: The estimated net worth of Vivienne R. Schiffer is at least $1,499,684 dollars as of 25 Feb 2026. Vivienne R. Schiffer is the SVP, CLO, CCO & Corp Secretary of Great Lakes Dredge & Dock CORP and owns shares of Great Lakes Dredge & Dock CORP (GLDD) stock worth about $1.5M.
Signature: /s/Vivienne R. Schiffer, by Power of Attorney
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Ownership of Vivienne R. Schiffer

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
GLDD	Great Lakes Dredge & Dock CORP	SVP, CLO, CCO & Corp Secretary	$1,499,684			23 Feb 2026

Insider Transactions Reported by Vivienne R. Schiffer:

Sym	Company	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.