GLDD (GLDD) CEO receives 132,825-share restricted stock unit grant

Rhea-AI Filing Summary

Great Lakes Dredge & Dock Corp reported that CEO and President Lasse Petterson acquired 132,825 shares of common stock through a grant of restricted stock units at a stated price of $0.0000 per share on February 23, 2026. These restricted stock units vest in three equal annual installments beginning on February 23, 2027, meaning the shares are earned over time rather than all at once. Following this grant, Petterson's directly held common stock position increased to 1,292,202.29 shares.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Petterson Lasse

(Last) (First) (Middle)

C/O GREAT LAKES DREDGE & DOCK CORP.

9811 KATY FREEWAY, SUITE 1200

(Street)

HOUSTON TX 77024

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Great Lakes Dredge & Dock CORP [ GLDD ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO & President

3. Date of Earliest Transaction (Month/Day/Year)
02/23/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/23/2026		A		132,825	A	(1)	1,292,202.29	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents restricted stock units that vest in three equal annual installments beginning on February 23, 2027.

	/s/Vivienne R. Schiffer, by Power of Attorney	02/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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FAQ

What insider transaction did GLDD CEO Lasse Petterson report on this Form 4?

Lasse Petterson reported acquiring 132,825 shares of Great Lakes Dredge & Dock common stock via a restricted stock unit grant. The award was recorded at $0.0000 per share and reflects equity-based compensation, not an open-market purchase of shares.

How do the GLDD restricted stock units granted to the CEO vest over time?

The restricted stock units granted to GLDD’s CEO vest in three equal annual installments. Vesting begins on February 23, 2027, so one-third of the units vest each year over three years, tying the compensation to continued service and long-term performance.

How many GLDD shares does CEO Lasse Petterson own after this Form 4 grant?

After the reported grant, Lasse Petterson directly owns 1,292,202.29 shares of Great Lakes Dredge & Dock common stock. This updated total reflects the addition of 132,825 shares from the restricted stock unit award disclosed in the Form 4 filing.

Was cash paid for the 132,825 GLDD shares reported in this insider filing?

No cash purchase was reported for these shares. The Form 4 shows 132,825 shares acquired at a stated price of $0.0000 per share, indicating they were granted as restricted stock units rather than bought on the open market.

What does the Form 4 code "A" mean for the GLDD CEO’s transaction?

The transaction code "A" on the Form 4 indicates a grant, award, or other acquisition. For GLDD, it reflects restricted stock units granted to the CEO, rather than a discretionary market trade, and is categorized as an acquisition of non-derivative common stock.