Great Lakes Dredge CFO granted 26,603 RSUs

Kornblau Scott Lee reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 02/25/2026 - 04:54 PM EST

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Rhea-AI Filing Summary

Kornblau Scott Lee reported acquisition or exercise transactions in this Form 4 filing.

Great Lakes Dredge & Dock’s SVP & CFO, Scott Lee Kornblau, reported an award of 26,603 shares of common stock in the form of restricted stock units. These RSUs vest in three equal annual installments beginning on February 23, 2027. Following this grant, his direct holdings total 138,733.24 shares.

Insider Trade Summary

Grant/Award: 26,603 shares

Grant/Award 1 txn

Insider Kornblau Scott Lee

Role SVP & CFO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	26,603	$0.00	$0.00

Holdings After Transaction: Common Stock — 138,733.24 shares (Direct)

Footnotes (1)

F1. Represents restricted stock units that vest in three equal annual installments beginning on February 23, 2027.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did GLDD’s SVP & CFO report on this Form 4?

GLDD’s SVP & CFO, Scott Lee Kornblau, reported receiving 26,603 restricted stock units of common stock. These units were granted at no cash cost to him and are structured as equity compensation, increasing his direct holdings to 138,733.24 shares after the award.

How do the 26,603 restricted stock units granted to GLDD’s CFO vest?

The 26,603 restricted stock units granted to GLDD’s CFO vest in three equal annual installments. Vesting begins on February 23, 2027, meaning one‑third of the units will convert each year over three years, aligning his compensation more closely with the company’s long‑term performance.

Did the GLDD CFO buy these 26,603 shares on the open market?

No, the GLDD CFO did not buy these shares on the open market. The Form 4 shows a grant coded as an award, with a price of 0.0000 per share, indicating equity compensation rather than a purchase transaction funded with personal cash.

What is the GLDD CFO’s ownership in common stock after this Form 4 award?

After the reported award, GLDD’s CFO directly holds 138,733.24 shares of common stock. This total reflects the addition of 26,603 restricted stock units reported in the filing and shows his ongoing equity stake tied to the company’s future share performance.

What does transaction code "A" mean in the GLDD Form 4 filing?

In this GLDD Form 4, transaction code "A" represents a grant, award, or other acquisition of securities. Here it indicates the CFO received 26,603 restricted stock units as compensation, rather than executing a traditional market purchase or sale of existing common shares.

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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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Kornblau Scott Lee

(Last)

(First)

(Middle)

C/O GREAT LAKES DREDGE & DOCK CORP.

9811 KATY FREEWAY, SUITE 1200

(Street)

HOUSTON

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)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	SVP & CFO

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	02/23/2026		A		26,603	A	⁽¹⁾	138,733.24	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Source: View Original Filing on SEC EDGAR