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

Jun 8, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Great Lakes Dredge & Dock CORP (GLDD)
CIK: 0001372020
Period of Report: 2012-06-06

Reporting Person: Simonelli David E (President, Dredging Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-06-06	Common Stock	A	12920	—	Acquired	114490	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-06-06	Employee stock option (right to buy)	$6.45	A	63024	Acquired	2021-06-27	Common Stock (63024)	Direct

Footnotes

F1: These shares are represented by restricted stock units. The restricted stock units vest on June 6, 2015.

F2: The option vests in three equal installments beginning June 6, 2013.