Kornblau Scott Lee 4

What Happened Scott Kornblau, SVP & Chief Financial Officer of Great Lakes Dredge & Dock Corp (GLDD), was awarded a total of 37,133 performance-based shares that vested on March 16, 2026 (22,265 shares and 14,868 shares). To satisfy tax and related obligations associated with the awards, 22,258 shares were withheld at a reported per-share value of $16.93, resulting in withheld value of $376,828. The transactions are reported as awards (code A) and withholding/ payment of tax liabilities (code F).

Key Details

• Transaction date: March 16, 2026; Form 4 filed March 18, 2026 (appears timely).
• Awards received: 22,265 shares (performance RSUs) and 14,868 shares (performance RSUs) — total 37,133 shares.
• Shares withheld for taxes/obligations: 4,719; 8,762; 2,926; and 5,851 shares — total 22,258 shares — all withheld at $16.93 per share for a combined value of $376,828.
• Net shares retained from the vesting event: 14,875 shares (37,133 awarded minus 22,258 withheld).
• Footnotes: F1 = shares from performance-based RSUs granted March 15, 2023; F2 = shares from performance-based RSUs granted March 15, 2024.
• Shares owned after the transaction: not specified in the provided filing.

Context These entries reflect vested performance-based restricted stock units and routine tax withholding (cashless/stock-withholding), not open-market sales. Such withholdings are standard practice to satisfy tax obligations and do not necessarily indicate a manager’s buy/sell intent in the market. The primary informative item for investors is that Kornblau received a sizeable performance award (37,133 shares), with roughly 40% withheld to cover taxes.