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.
Great Lakes Dredge & Dock Corporation filings document the company's transition from a Nasdaq-listed public company to a deregistered issuer after its completed acquisition by Saltchuk Resources. The record includes Form 25 notification for removal of its common stock from Nasdaq listing and Form 15 certification to terminate registration under Section 12(g) and suspend Exchange Act reporting duties.
Its 8-K material-event reports describe the merger agreement, tender-offer completion, common-stock treatment, related governance and officer matters, and other capital-structure disclosures, including securities registered before delisting.
GUNSTEN CHRISTOPHER reported acquisition or exercise transactions in this Form 4 filing.
Great Lakes Dredge & Dock Corp reported an amended insider transaction for SVP-Proj Svcs & Fleet Engineer Christopher Gunsten. He received a grant of 13,179 shares of Common Stock on May 8, 2025 at a stated price of $0.00 per share, bringing his direct holdings to 85,952 shares. The amendment corrects an administrative error in the original Form 4 by changing the reported vesting start date for the related Restricted Stock Units from March 15, 2026 to the correct date of May 8, 2026.
Great Lakes Dredge & Dock Corp senior vice president and CFO Scott Lee Kornblau reported an acquisition of 25,058 shares of common stock as a grant or award on May 8, 2025, at a stated price of $0.00 per share. Following this award, his directly held position increased to 171,935.24 shares. The amended Form 4 clarifies that the vesting date for the related Restricted Stock Units begins on May 8, 2026, correcting a prior administrative error that had shown vesting beginning on March 15, 2026.
Petterson Lasse reported acquisition or exercise transactions in this Form 4 filing.
Great Lakes Dredge & Dock Corp reported that CEO and President Lasse Petterson received a grant of 125,145 shares of Common Stock at no cash cost, increasing his directly held stake to 1,159,377.29 shares after the transaction.
This is an amended Form 4 that corrects an administrative error in a prior filing. The company clarifies that the related Restricted Stock Units begin vesting on May 8, 2026, rather than the previously reported March 15, 2026 vesting date.
Schiffer Vivienne reported acquisition or exercise transactions in this Form 4 filing.
Great Lakes Dredge & Dock reported that SVP, CLO, CCO & Corporate Secretary Vivienne Schiffer received a grant of 18,035 shares of common stock on May 8, 2025 at no cash cost as part of her compensation, bringing her direct holdings to 82,181 shares. This amended Form 4 corrects an administrative error in the original filing by updating the vesting start date for related restricted stock units from March 15, 2026 to the correct date of May 8, 2026.
Great Lakes Dredge & Dock Corporation reported that David J. Johanson, Senior Vice President, Project Acquisition and Operations, will retire effective March 27, 2026. He has held a key leadership role overseeing project acquisition and operations for the company.
The company and Mr. Johanson are expected to enter into a retirement agreement under which he will receive continued vesting of his equity awards. This indicates his existing stock-based compensation will continue to vest over time following his retirement, rather than ending immediately.
Great Lakes Dredge & Dock Corp’s SVP, Chief Legal Officer, Chief Compliance Officer and Corporate Secretary Vivienne Schiffer reported routine equity compensation activity in company common stock. On March 16, 2026, she received two stock awards of 14,213 and 10,454 shares, granted at no purchase price, following the satisfaction of performance conditions on performance-based restricted stock units granted in March 2023 and March 2024.
To cover tax obligations, a total of 10,125 shares were disposed of through tax-withholding transactions at $16.93 per share, which are not open-market sales. After these awards and related withholdings, Schiffer directly owned 115,872 shares of Great Lakes Dredge & Dock Corp common stock.
Great Lakes Dredge & Dock CORP CEO Lasse Petterson reported equity compensation activity in company stock. On March 16, 2026, he acquired 94,540 and 78,924 shares of common stock as grants tied to performance-based restricted stock units from March 15, 2023 and March 15, 2024. To cover tax obligations, 103,821 shares were withheld at $16.93 per share through several F-code transactions, which are not open-market sales. After these awards and tax withholdings, he directly holds 1,361,845.29 shares of common stock.
Great Lakes Dredge & Dock Corp’s SVP & CFO Scott Lee Kornblau reported stock-based compensation and related tax withholding, not open‑market trading. On March 16, 2026, he received two grants of common stock at $0.00 per share tied to performance-based restricted stock units from March 15, 2023 and March 15, 2024.
To cover tax obligations, a total of 22,258 shares of common stock were disposed of at $16.93 per share through tax-withholding transactions. Following these awards and withholdings, Kornblau directly holds 153,608 shares of Great Lakes Dredge & Dock common stock.