Great Lakes Dredge & Dock CORP — Director's Dealing 2011

Aug 12, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Great Lakes Dredge & Dock CORP (GLDD)
CIK: 0001372020
Period of Report: 2011-08-10

Reporting Person: Leight Nathan (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-08-10	Common Stock	P	10000	$4.512	Acquired	1554671	Direct
2011-08-10	Common Stock	P	15000	$4.537	Acquired	1554671	Direct
2011-08-11	Common Stock	P	3000	$4.62	Acquired	1554671	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	367250	Indirect
Common Stock	4000	Indirect

Footnotes

F1: Represents the weighted average price. The price range is $4.47 to $4.53. Upon request by the Commission staff, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares acquired at each separate price.

F2: Represents the weighted average price. The price range is $4.47 to $4.59. Upon request by the Commission staff, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares acquired at each separate price.

F3: 1000 shares of common stock are owned by Bruce Leight UGMA (Mr. Leight's son is the beneficiary), 1000 shares are owned by Jennifer Leight UGMA (Mr. Leight's daughter is the beneficiary), 1000 shares are owned by Keith Leight UGMA (Mr. Leight's son is the beneficiary), and 1000 shares are owned by Lillianne Leight UGMA (Mr. Leight's daughter is the beneficiary). Mr. Leight serves as a trustee or co-trustee of those trusts.