WILLIAM H. HANSON - 28 Feb 2022 Form 4 Insider Report for Great Lakes Dredge & Dock CORP (GLDD)

Role: SVP, Gov't Relations & Bus Dev
Signature: /s/Vivienne R. Schiffer, by Power of Attorney
Issuer symbol: GLDD
Transactions as of: 28 Feb 2022
Net transactions value: -$15,734
Form type: 4
Filing time: 02 Mar 2022, 19:39:18 UTC
Previous filing: 29 Jun 2021
Next filing: 09 Mar 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GLDD	Common Stock	Options Exercise	$12,190	+1,890	+6.8%	$6.45	29,804	28 Feb 2022	Direct
transaction	GLDD	Common Stock	Sale	$15,734	-1,119	-3.8%	$14.06	28,685	28 Feb 2022	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	GLDD	Employee Stock Option	Options Exercise	$12,190	-1,890	-100%	$6.45	0	28 Feb 2022	Common Stock	1,890	$6.45	Direct	F2, F3

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

Explanation of Responses:

Id	Content
F1	Represents total number of shares sold to cover the exercise price and applicable taxes in connection with the exercise of the underlying options.
F2	Represents an exercise of vested employee stock options granted on June 6, 2012 under the Great Lakes Dredge & Dock Corporation 2007 Long-Term Incentive Plan.
F3	The options vested in three equal installments beginning June 6, 2013.