Great Lakes Dredge & Dock CORP — Director's Dealing 2021

Apr 15, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Great Lakes Dredge & Dock CORP (GLDD)
CIK: 0001372020
Period of Report: 2021-04-12

Reporting Person: Simonelli David E (Chief Operating Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-04-12	Common Stock	M	22000	$7.56	Acquired	317895	Direct
2021-04-12	Common Stock	S	22000	$15.1675	Disposed	295895	Direct
2021-04-12	Common Stock	S	14582	$15.1761	Disposed	281313	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-04-12	Employee Stock Option	$7.56	M	22000	Disposed	2023-05-07	Common Stock (22000)	Direct

Footnotes

F1: Represents an exercise of vested employee stock options granted on May 7, 2013 under the Great Lakes Dredge & Dock Corporation 2007 Long-Term Incentive Plan.

F2: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F3: Represents the weighted average price. The shares were sold in multiple transactions ranging from $15.08 to $15.45, inclusive. Upon request by the Commission staff, the issuer or security holder of the issuer, the reporting person will provide information regarding the number of shares disposed of at each separate price.

F4: Represents the weighted average price. The shares were sold in multiple transactions ranging from $15.09 to $15.53, inclusive. Upon request by the Commission staff, the issuer or security holder of the issuer, the reporting person will provide information regarding the number of shares disposed of at each separate price.

F5: The options vested in three equal installments beginning May 7, 2014.