Welcome to our dedicated page for Great Lakes Dredge & Dock SEC filings (Ticker: GLDD), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
This page provides access to U.S. Securities and Exchange Commission (SEC) filings for Great Lakes Dredge & Dock Corporation (NASDAQ: GLDD), a Houston-based company described as the largest provider of dredging services in the United States. Through these filings, investors can review official disclosures about the company’s financial performance, capital structure, and material agreements.
Great Lakes uses current reports on Form 8-K to announce significant events. Recent examples include 8-K filings reporting quarterly earnings releases for periods such as the three months ended June 30 and September 30, as well as an 8-K describing Amendment No. 3 to its Second Amended and Restated Revolving Credit and Security Agreement. That amended credit agreement outlines the terms of a senior secured revolving credit facility, including total commitments, maturity, permitted uses of borrowings, collateral, covenants, and events of default.
In addition to 8-Ks, investors typically look to annual reports on Form 10-K and quarterly reports on Form 10-Q (when available) for detailed financial statements, management’s discussion and analysis, risk factors, and information about the company’s dredging and offshore energy operations. These filings often discuss topics such as backlog, fleet investments, and the company’s relationships with key customers like the U.S. Army Corps of Engineers.
Stock Titan’s platform enhances these documents with AI-powered summaries that highlight the main points of lengthy filings, helping readers quickly understand items such as new credit agreements, changes in liquidity, or updates on major projects. Real-time ingestion of filings from the SEC’s EDGAR system allows users to see new GLDD disclosures soon after they are filed, while AI-generated insights can assist in interpreting complex legal and financial language.
For those tracking insider activity, this page also centralizes access to Forms 3, 4, and 5 (when filed), which report beneficial ownership and changes in holdings by directors, officers, and significant shareholders. Together, these SEC documents form the core regulatory record for Great Lakes Dredge & Dock Corporation.
Great Lakes Dredge & Dock Corporation SVP, CLO, CCO & Corporate Secretary Vivienne Schiffer reported equity changes tied to the company’s merger with Saltchuk Resources. On April 1, 2026, she acquired 28,945 shares of common stock at $0.00 per share through a grant or award, reflecting the vesting of performance-based restricted stock units under the merger terms.
That same day, 144,817 common shares held directly were disposed of in a tender-offer transaction, leaving her with 0 directly owned shares after the merger closed. Under the merger agreement, each Great Lakes share was cancelled and converted into the right to receive $17.00 in cash.
The filing notes prior holdings included 71,357 restricted stock units. At the effective time, 52,855 RSUs were cancelled for a cash payment based on the $17.00 merger consideration, while 18,502 RSUs were replaced with a cash-based award of equivalent value that keeps the original time-based vesting schedule.
Great Lakes Dredge & Dock CEO Lasse Petterson reported merger-related equity transactions. He was granted 206,445 shares of common stock at no cost upon full vesting of performance-based restricted stock units at the merger’s effective time, as specified in the Merger Agreement.
On the same date, 1,568,290.29 directly held shares of common stock were disposed of pursuant to a tender offer when Saltchuk’s merger subsidiary combined with the company, with each share converted into the right to receive $17.00 in cash, subject to tax withholding. Following this disposition, Petterson reported no directly held common shares.
The filing notes 503,878 restricted stock units in total, of which 375,541 RSUs were cancelled in exchange for cash equal to the underlying shares multiplied by the $17.00 merger consideration, while 128,337 RSUs were replaced by a cash-based award of equivalent value that keeps the original time-based vesting schedule.
Great Lakes Dredge & Dock SVP & CFO Scott Lee Kornblau reported equity changes tied to the company’s cash merger with Saltchuk Resources. On April 1, 2026, performance-based restricted stock units fully vested, resulting in an acquisition of 90,518 shares of common stock at no cost.
At the merger’s effective time, each share of Great Lakes common stock was cancelled and converted into the right to receive $17.00 in cash. Kornblau’s 244,126.24 directly held shares were disposed of pursuant to the tender offer, reducing his direct common stock holdings to zero.
The filing notes 149,614 restricted stock units, of which 123,910 RSUs were cancelled for cash based on the $17.00 merger consideration, while 25,704 RSUs were replaced with a cash-based award of equivalent value that keeps the same time-based vesting schedule.
Great Lakes Dredge & Dock Corporation SVP David Johanson reported mixed equity transactions tied to the company’s sale to Saltchuk Resources. On April 1, 2026, performance-based restricted stock units fully vested and 71,860 shares of common stock were acquired at no cost, reflecting equity awards settling at the merger’s effective time.
That same day, 191,597.5164 shares of common stock were disposed of in a transaction labeled as a tender-offer disposition, as each outstanding share of Great Lakes common stock was cancelled and converted into the right to receive $17.00 in cash, subject to tax withholding. After this cash-out, Johanson reported 0 common shares directly owned.
In a separate award-related transaction on March 25, 2026, he acquired 521.257 shares of common stock at $10.821 per share under the company’s 2025 Employee Stock Purchase Plan, which prices purchases at 85% of the closing price on a specified date. Footnotes also note that large blocks of restricted stock units were either converted into cash at the $17.00 merger consideration or replaced by equivalent cash-based awards with the same time-based vesting conditions.
Great Lakes Dredge & Dock Corporation senior vice president of market development William H. Hanson reported equity award and merger-related share activity. On April 1, 2026, his performance-based restricted stock units fully vested under the merger agreement, and his common shares were converted into cash at $17.00 per share.
The filing notes 33,233 restricted stock units in total, of which 24,785 were cancelled for a cash payment based on the $17.00 merger price and 8,448 were converted into a cash-based award with the same time-based vesting terms. Following the tender-offer related disposition, the Form 4 shows no remaining common stock directly held.
Great Lakes Dredge & Dock Corporation’s Form 4 shows SVP-Proj Svcs & Fleet Engineer Christopher Gunsten’s equity changing hands in connection with the closing of the Saltchuk Resources merger. Performance-based restricted stock units fully vested at the merger’s effective time, resulting in an acquisition of 71,860 shares of common stock at no cost.
Immediately afterward, a total of 182,496 common shares were disposed of pursuant to the tender offer, with each share converted into the right to receive $17.00 in cash. Following these transactions, Gunsten no longer directly holds Great Lakes common stock, while certain RSUs were cashed out and others converted into a cash-based award that retains the prior time-based vesting conditions.
Great Lakes Dredge & Dock SVP Eleni Beyko reported merger-related stock changes. On April 1, 2026, she acquired 25,505 shares of common stock as a grant or award, then all 151,312 directly held shares were disposed of pursuant to a tender offer in connection with the company’s merger.
Under the Merger Agreement with Saltchuk Resources’ Huron MergeCo, each share of Great Lakes Dredge & Dock common stock was cancelled at the effective time and converted into the right to receive $17.00 in cash, without interest and subject to tax withholdings. Footnotes state certain performance-based restricted stock units fully vested under the Merger Agreement, while 61,359 RSUs were cashed out at the merger price and 15,769 RSUs were replaced by an equivalent-value cash-based award with the same time-based vesting terms.
Great Lakes Dredge & Dock Corporation VP & CAO Ryan Bayer reported equity transactions tied to the completion of the Saltchuk merger. On April 1, 2026, 5,607 performance-based restricted stock units vested and were delivered as Common Stock under the Merger Agreement.
At the same Effective Time, all 37,380 outstanding shares of Common Stock held directly by Bayer were disposed of pursuant to the tender offer, with each share converted into the right to receive $17.00 in cash, before taxes. Following these actions, Bayer no longer holds Common Stock, though certain awards converted into cash-based arrangements.
Great Lakes Dredge & Dock director Ronald Steger reported routine transactions tied to the closing of a cash merger. In connection with the merger of Great Lakes Dredge & Dock Corporation into a wholly owned subsidiary of Saltchuk Resources, each share of common stock was converted into the right to receive $17.00 in cash. Steger’s 20,404 shares of common stock were disposed of pursuant to a tender offer, and 45,068 Deferred Stock Units (DSUs) were canceled and converted into a cash payment equal to the number of underlying shares multiplied by the $17.00 merger consideration. The filing also notes a grant of 1,625 DSUs on March 31, 2026 under the company’s Director Deferral Plan, which were included in the DSUs canceled at the merger effective time. Following these transactions, the Form 4 shows no remaining common stock or DSU holdings for Steger.
Great Lakes Dredge & Dock director Earl L. Shipp disposed of 42,619 shares of common stock pursuant to a tender offer tied to the company’s merger. According to the merger agreement, on April 1, 2026 each outstanding share of Great Lakes Dredge & Dock common stock was cancelled and converted into the right to receive $17.00 in cash, making the company a wholly owned subsidiary of Saltchuk Resources. Following this transaction, Shipp reported owning zero shares directly.