# EDGAR Filing Document

**Accession Number:** 0001372020
**File Stem:** 0001193125-26-117940
**Filing Date:** 2026-3
**Character Count:** 4914
**Document Hash:** 92a401e48fa8ddee6222e937540fe6a8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-117940.hdr.sgml**: 20260320

**ACCESSION NUMBER**: 0001193125-26-117940

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 10

**CONFORMED PERIOD OF REPORT**: 20260317

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**FILED AS OF DATE**: 20260320

**DATE AS OF CHANGE**: 20260320

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Great Lakes Dredge & Dock CORP
- **CENTRAL INDEX KEY:** 0001372020
- **STANDARD INDUSTRIAL CLASSIFICATION:** HEAVY CONSTRUCTION OTHER THAN BUILDING CONST - CONTRACTORS [1600]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 205336063
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33225
- **FILM NUMBER:** 26779294

**BUSINESS ADDRESS:**
- **STREET 1:** 9811 KATY FREEWAY
- **STREET 2:** SUITE 1200
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77024
- **BUSINESS PHONE:** (346) 359-1010

**MAIL ADDRESS:**
- **STREET 1:** 9811 KATY FREEWAY
- **STREET 2:** SUITE 1200
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77024

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Great Lakes Dredge & Dock Holdings Corp.
- **DATE OF NAME CHANGE:** 20060808

?xml version='1.0' encoding='ASCII'? 8-K

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**UNITED STATES SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

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**FORM** 8-K

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**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported):** March 17, 2026

![img40820870_0.jpg](img40820870_0.jpg)

Great Lakes Dredge & Dock Corporation

**(Exact name of registrant as specified in its charter)**

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| | | |
|:---|:---|:---|
| Delaware | 001-33225<br>**(Commission File Number)** | 20-5336063 |
| **(State or other jurisdiction of**<br>**incorporation)** | 001-33225<br>**(Commission File Number)** | **(I.R.S. Employer**<br>**Identification No.)** |
|  | 001-33225<br>**(Commission File Number)** |  |
| 9811 Katy Freeway, Suite 1200**,** Houston**,** TX | 001-33225<br>**(Commission File Number)** | 77024 |
| **(Address of principal executive offices)** | 001-33225<br>**(Commission File Number)** | **(Zip Code)** |

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**(**346**)** 359-1010

**(Registrant's telephone number, including area code)**

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**(Former name or former address, if changed since last report)**

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

 Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

 Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

 Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

 Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

**Securities registered pursuant to Section 12(b) of the Act:** 

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| | |
|:---|:---|
| Title of each class | Name of each exchange on which registered |
| Common Stock (Par Value $0.0001)<br> GLDD | Nasdaq Stock Market, LLC |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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**Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**

Great Lakes Dredge & Dock Corporation (the "Company") announced today that David J. Johanson, its Senior Vice President, Project Acquisition and Operations, will retire effective March 27, 2026. Mr. Johanson and the Company are expected to enter into a retirement agreement whereby Mr. Johanson will receive continued vesting of equity awards.

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**SIGNATURE**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | |
|:---|:---|
| **GREAT LAKES DREDGE & DOCK CORPORATION** | **GREAT LAKES DREDGE & DOCK CORPORATION** |
| By: | /s/Vivienne R. Schiffer |
|  | Vivienne R. Schiffer |
|  | Senior Vice President, Chief Legal Officer, Chief Compliance Officer and Corporate Secretary |

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Date: March 20, 2026

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