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Great Lakes Dredge & Dock (GLDD) 10K Form and Latest SEC Filings 2026

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$17.00 0.00 (0.00%)
As of 05/6/2026

Latest Great Lakes Dredge & Dock SEC Filings & Recent Activity

Great Lakes Dredge & Dock (NASDAQ:GLDD) has submitted 512+ documents to the U.S. Securities and Exchange Commission (SEC) since 2017. For investors, these filings are the primary source of verified financial data — covering everything from annual revenue and debt levels in the 10-K, to material business events in 8-K current reports, to insider buying and selling activity in Form 4 disclosures. Key figures from these filings, including revenue, earnings, and cash flow, are summarized in Great Lakes Dredge & Dock's financial statements. The most recent filing was a Form SCHEDULE 13G submitted on April 30, 2026.

Form 4
Great Lakes Dredge & Dock CORP Reports Ownership Change on Apr. 1, 2026

Form 4 filings disclose changes in stock ownership by company insiders, including purchases, sales, grants, and option exercises.

View insider ownership

8-K
Great Lakes Dredge & Dock Files Current Report on Apr. 1, 2026

An 8-K is filed when a material corporate event occurs, such as an acquisition, leadership change, or financial update.

View filing

10-Q
Great Lakes Dredge & Dock Files Quarterly Report on Nov. 4, 2025

The 10-Q contains Great Lakes Dredge & Dock's unaudited quarterly financial statements, revenue, earnings updates, and cash flow changes between annual reports.

View earnings history

Great Lakes Dredge & Dock SEC Filing History

Browse Great Lakes Dredge & Dock's complete SEC filing history using the filters below. Filter by form type - 10-K, 10-Q, 8-K, Form 4, and more - or set a custom date range to find a filing.

DateFilerForm TypeView
04/30/2026 9:41 AM
Great Lakes Dredge & Dock (1372020) Subject
VANGUARD CAPITAL MANAGEMENT LLC (2100119) Filed by
Form SCHEDULE 13G
04/28/2026 3:34 PM
BlackRock, Inc. (2012383) Filed by
Great Lakes Dredge & Dock (1372020) Subject
Form SCHEDULE 13G/A
04/13/2026 2:28 PM
Great Lakes Dredge & Dock (1372020) Filer
Form 15-12G
04/09/2026 12:42 PM
DIMENSIONAL FUND ADVISORS LP (354204) Filed by
Great Lakes Dredge & Dock (1372020) Subject
Form SCHEDULE 13G/A
04/02/2026 11:15 PM
Great Lakes Dredge & Dock (1372020) Filer
Form EFFECT
04/01/2026 3:28 PM
Great Lakes Dredge & Dock (1372020) Issuer
Kornblau Scott Lee (1724302) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/01/2026 3:31 PM
Great Lakes Dredge & Dock (1372020) Issuer
Petterson Lasse (1455941) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/01/2026 3:33 PM
Great Lakes Dredge & Dock (1372020) Issuer
Schiffer Vivienne (1835547) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/01/2026 3:17 PM
Great Lakes Dredge & Dock (1372020) Issuer
GUNSTEN CHRISTOPHER (1939594) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/01/2026 3:21 PM
Great Lakes Dredge & Dock (1372020) Issuer
HANSON WILLIAM H (1808410) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/01/2026 3:24 PM
Great Lakes Dredge & Dock (1372020) Issuer
JOHANSON DAVID (1940445) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/01/2026 3:09 PM
BAYER RYAN (1990270) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/01/2026 1:00 PM
Great Lakes Dredge & Dock (1372020) Filer
Form POS AM
04/01/2026 1:04 PM
Great Lakes Dredge & Dock (1372020) Filer
Form S-8 POS
04/01/2026 1:05 PM
Great Lakes Dredge & Dock (1372020) Filer
Form S-8 POS
04/01/2026 1:07 PM
Great Lakes Dredge & Dock (1372020) Filer
Form S-8 POS
04/01/2026 1:09 PM
Great Lakes Dredge & Dock (1372020) Filer
Form S-8 POS
04/01/2026 1:10 PM
Great Lakes Dredge & Dock (1372020) Filer
Form S-8 POS
04/01/2026 1:11 PM
Great Lakes Dredge & Dock (1372020) Filer
Form S-8 POS
04/01/2026 11:23 AM
Great Lakes Dredge & Dock (1372020) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/01/2026 8:01 AM
Great Lakes Dredge & Dock (1372020) Subject
Saltchuk Resources, Inc. (1806446) Filed by
Form SC TO-T/A
04/01/2026 8:11 AM
Great Lakes Dredge & Dock (1372020) Subject
Nasdaq Stock Market LLC (1354457) Filed by
Form 25-NSE
04/01/2026 8:16 AM
Great Lakes Dredge & Dock (1372020) Subject
Form SC 14D9/A
03/27/2026 4:28 PM
Great Lakes Dredge & Dock (1372020) Subject
Form SC 14D9/A
03/27/2026 8:35 AM
Great Lakes Dredge & Dock (1372020) Subject
VANGUARD GROUP INC (102909) Filed by
Form SCHEDULE 13G/A
03/25/2026 4:14 PM
BAYER RYAN (1990270) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4/A
03/25/2026 4:18 PM
BEYKO ELENI (1929993) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
03/25/2026 4:02 PM
Great Lakes Dredge & Dock (1372020) Issuer
HANSON WILLIAM H (1808410) Reporting
Form 4/A
03/25/2026 4:08 PM
BEYKO ELENI (1929993) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4/A
03/25/2026 3:58 PM
Great Lakes Dredge & Dock (1372020) Issuer
JOHANSON DAVID (1940445) Reporting
Form 4/A
03/25/2026 3:40 PM
Great Lakes Dredge & Dock (1372020) Issuer
Petterson Lasse (1455941) Reporting
Form 4/A
03/25/2026 3:48 PM
Great Lakes Dredge & Dock (1372020) Issuer
Kornblau Scott Lee (1724302) Reporting
Form 4/A
03/25/2026 3:53 PM
Great Lakes Dredge & Dock (1372020) Issuer
GUNSTEN CHRISTOPHER (1939594) Reporting
Form 4/A
03/25/2026 3:36 PM
Great Lakes Dredge & Dock (1372020) Issuer
Schiffer Vivienne (1835547) Reporting
Form 4/A
03/23/2026 4:15 PM
Great Lakes Dredge & Dock (1372020) Subject
Form SC 14D9/A
03/23/2026 3:12 PM
Great Lakes Dredge & Dock (1372020) Subject
Saltchuk Resources, Inc. (1806446) Filed by
Form SC TO-T/A
03/20/2026 4:29 PM
Great Lakes Dredge & Dock (1372020) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/18/2026 4:10 PM
Great Lakes Dredge & Dock (1372020) Issuer
Petterson Lasse (1455941) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2026 4:06 PM
Great Lakes Dredge & Dock (1372020) Issuer
Kornblau Scott Lee (1724302) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2026 3:51 PM
Great Lakes Dredge & Dock (1372020) Issuer
GUNSTEN CHRISTOPHER (1939594) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2026 3:44 PM
BEYKO ELENI (1929993) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2026 3:39 PM
BAYER RYAN (1990270) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2026 3:21 PM
Great Lakes Dredge & Dock (1372020) Subject
Form SC 14D9/A
03/18/2026 8:23 AM
Great Lakes Dredge & Dock (1372020) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/13/2026 3:35 PM
Great Lakes Dredge & Dock (1372020) Subject
Form SC 14D9/A
02/25/2026 3:41 PM
Great Lakes Dredge & Dock (1372020) Issuer
HANSON WILLIAM H (1808410) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/25/2026 3:44 PM
Great Lakes Dredge & Dock (1372020) Issuer
JOHANSON DAVID (1940445) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/25/2026 3:51 PM
Great Lakes Dredge & Dock (1372020) Issuer
GUNSTEN CHRISTOPHER (1939594) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/25/2026 3:30 PM
BAYER RYAN (1990270) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/23/2026 3:10 PM
Great Lakes Dredge & Dock (1372020) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
02/11/2026 6:37 AM
Great Lakes Dredge & Dock (1372020) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/05/2026 5:02 PM
Great Lakes Dredge & Dock (1372020) Issuer
Shipp Earl L (1721123) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
01/05/2026 5:08 PM
DICKERSON LAWRENCE R (1249072) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
01/05/2026 5:12 PM
Great Lakes Dredge & Dock (1372020) Issuer
Steger Ronald (1616560) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
01/05/2026 5:15 PM
Great Lakes Dredge & Dock (1372020) Issuer
Shanahan Kathleen M (1292085) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
01/05/2026 4:52 PM
Armstrong Dana A (1907154) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
12/10/2025 4:21 PM
Great Lakes Dredge & Dock (1372020) Subject
JOHANSON DAVID (1940445) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
12/04/2025 4:17 PM
Great Lakes Dredge & Dock (1372020) Issuer
JOHANSON DAVID (1940445) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
12/03/2025 3:56 PM
Great Lakes Dredge & Dock (1372020) Subject
JOHANSON DAVID (1940445) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/07/2025 1:10 PM
Great Lakes Dredge & Dock (1372020) Subject
PRUDENTIAL FINANCIAL INC (1137774) Filed by
Form SCHEDULE 13G/A
11/05/2025 12:27 PM
Great Lakes Dredge & Dock (1372020) Subject
JENNISON ASSOCIATES LLC (53417) Filed by
Form SCHEDULE 13G/A
11/04/2025 3:00 PM
Great Lakes Dredge & Dock (1372020) Filer
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
11/04/2025 7:20 AM
Great Lakes Dredge & Dock (1372020) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
10/27/2025 3:11 PM
Great Lakes Dredge & Dock (1372020) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
10/01/2025 4:46 PM
Great Lakes Dredge & Dock (1372020) Issuer
Steger Ronald (1616560) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
10/01/2025 4:02 PM
Great Lakes Dredge & Dock (1372020) Issuer
Shanahan Kathleen M (1292085) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
10/01/2025 4:07 PM
Great Lakes Dredge & Dock (1372020) Issuer
Shipp Earl L (1721123) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
10/01/2025 3:45 PM
Armstrong Dana A (1907154) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
08/13/2025 4:17 PM
Great Lakes Dredge & Dock (1372020) Issuer
Kornblau Scott Lee (1724302) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
08/11/2025 3:30 PM
Great Lakes Dredge & Dock (1372020) Subject
Kornblau Scott Lee (1724302) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
08/05/2025 3:00 PM
Great Lakes Dredge & Dock (1372020) Filer
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
08/05/2025 7:44 AM
Great Lakes Dredge & Dock (1372020) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
07/01/2025 4:09 PM
DICKERSON LAWRENCE R (1249072) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
07/01/2025 4:13 PM
Great Lakes Dredge & Dock (1372020) Issuer
Shanahan Kathleen M (1292085) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
07/01/2025 4:16 PM
Great Lakes Dredge & Dock (1372020) Issuer
Shipp Earl L (1721123) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
07/01/2025 4:21 PM
Great Lakes Dredge & Dock (1372020) Issuer
Steger Ronald (1616560) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/15/2025 4:48 PM
Great Lakes Dredge & Dock (1372020) Subject
PRUDENTIAL FINANCIAL INC (1137774) Filed by
Form SCHEDULE 13G/A
05/12/2025 5:14 PM
BEYKO ELENI (1929993) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2025 4:28 PM
BAYER RYAN (1990270) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2025 4:33 PM
BEYKO ELENI (1929993) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2025 4:38 PM
Great Lakes Dredge & Dock (1372020) Issuer
HANSON WILLIAM H (1808410) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2025 4:41 PM
Great Lakes Dredge & Dock (1372020) Issuer
JOHANSON DAVID (1940445) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2025 4:46 PM
Great Lakes Dredge & Dock (1372020) Issuer
GUNSTEN CHRISTOPHER (1939594) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2025 4:51 PM
Great Lakes Dredge & Dock (1372020) Issuer
Schiffer Vivienne (1835547) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2025 4:54 PM
Great Lakes Dredge & Dock (1372020) Issuer
Kornblau Scott Lee (1724302) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2025 4:57 PM
Great Lakes Dredge & Dock (1372020) Issuer
Petterson Lasse (1455941) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/09/2025 11:14 AM
Great Lakes Dredge & Dock (1372020) Subject
JENNISON ASSOCIATES LLC (53417) Filed by
Form SCHEDULE 13G/A
05/08/2025 4:29 PM
Great Lakes Dredge & Dock (1372020) Filer
Form S-8
Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans  
05/08/2025 4:30 PM
Great Lakes Dredge & Dock (1372020) Filer
Form S-8
Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans  
05/08/2025 4:43 PM
BEYKO ELENI (1929993) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/07/2025 4:44 PM
Great Lakes Dredge & Dock (1372020) Issuer
Kornblau Scott Lee (1724302) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/07/2025 4:49 PM
Great Lakes Dredge & Dock (1372020) Issuer
Petterson Lasse (1455941) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/07/2025 4:53 PM
Great Lakes Dredge & Dock (1372020) Issuer
Schiffer Vivienne (1835547) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/07/2025 4:27 PM
BEYKO ELENI (1929993) Reporting
Great Lakes Dredge & Dock (1372020) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/07/2025 4:31 PM
Great Lakes Dredge & Dock (1372020) Issuer
GUNSTEN CHRISTOPHER (1939594) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/07/2025 4:35 PM
Great Lakes Dredge & Dock (1372020) Issuer
HANSON WILLIAM H (1808410) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/07/2025 4:40 PM
Great Lakes Dredge & Dock (1372020) Issuer
JOHANSON DAVID (1940445) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
(Data available from 1/1/2016 forward)

Great Lakes Dredge & Dock SEC Filings - Frequently Asked Questions

Great Lakes Dredge & Dock (GLDD) has submitted 512+ filings to the SEC since 2017. You can browse the complete history or filter by form type using the tools above.

Great Lakes Dredge & Dock's fiscal year ends on December 31. The company typically files its 10-K annual report by the end of February, covering the prior fiscal year's financial results. Key financial data from these reports is available on Great Lakes Dredge & Dock's financial statements page.

The most recent filing was a Form SCHEDULE 13G submitted on April 30, 2026. View the full filing using the link above.

SEC Filing Types: 10-K, 10-Q, 8-K and More

SEC filings are legally required disclosures that public companies submit to the U.S. Securities and Exchange Commission. Unlike press releases or earnings call transcripts, these documents are filed under legal obligation — meaning the financial data they contain is audited, standardized, and subject to penalties if materially false. For investors, that makes SEC filings the most reliable primary source available for evaluating a company's true financial position.

Yes. All SEC filings are publicly available through the SEC's EDGAR database and on financial research platforms like MarketBeat. Companies are required by law to make these disclosures accessible to all investors — meaning retail investors have access to the same source documents as institutional analysts.

A 10-K is an annual report containing audited financial statements and a full review of the company's business — it is the most comprehensive filing a company makes each year. A 10-Q is a shorter, unaudited quarterly update filed three times per year between annual reports. Investors typically use the 10-K for deep fundamental analysis and the 10-Q to track whether the company is on pace with its guidance mid-year.

The most important filing for fundamental investors. Filed once per year, the 10-K contains audited financial statements, revenue and earnings trends, debt obligations, risk factors, and management's own assessment of the business. Reading the risk factors section and comparing year-over-year financials can reveal issues that don't show up in analyst summaries.

An unaudited financial update filed three times per year (the 10-K covers Q4). Investors use 10-Qs to track whether guidance is on pace, monitor changes in cash flow or inventory, and catch any mid-year shifts in business conditions before they become headline news.

Filed within four business days of a material event — earnings releases, merger announcements, executive departures, or major asset sales. Because 8-Ks are filed before media coverage catches up, they are often the fastest way to get unfiltered information directly from the company on market-moving events.

Filed within two business days whenever an executive or director buys or sells company stock. Insider purchases — especially large or clustered buys — are often interpreted as a signal of management confidence. Insider selling is more ambiguous but worth monitoring for patterns, particularly around lock-up expirations or ahead of major announcements.


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This page (NASDAQ:GLDD) was last updated on 5/7/2026 by MarketBeat.com Staff.
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