Great Lakes Dredge & Dock CORP — Director's Dealing 2012

Apr 20, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Great Lakes Dredge & Dock CORP (GLDD)
CIK: 0001372020
Period of Report: 2012-04-19

Reporting Person: Mackie Douglas B (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-04-19	Common Stock	S	2164	$7.1891	Disposed	60781	Direct

Footnotes

F1: The sales reported were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Mackie on November 3, 2011.