Great Lakes Dredge & Dock CORP (GLDD) Insider Ownership

Historic Insider Ownership Trends

GLDD's three largest insider shareholders as of April 22, 2026 are David E Simonelli (Chief Operating Officer, 245.87K shares), Todd M Lightfoot (Chief Accounting Officer, 66.76K shares), James Tastard (Svp Chrao, 39.73K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
David E Simonelli Chief Operating Officer 245,866 0 11 May, 2022
Todd M Lightfoot Chief Accounting Officer 25,252 41,510 09 May, 2023
James Tastard Svp Chrao 39,734 0 09 May, 2023
Elaine J Dorward-King - 35,710 0 03 Jul, 2023

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
01 Apr, 2026 Eleni Beyko Common Stock A 25,505 - 151,312 D A
01 Apr, 2026 Ronald Steger Common Stock D 20,404 - 0 D U
25 Mar, 2026 David Johanson Common Stock A 521 $10.82 119,738 D A
01 Apr, 2026 Lasse Petterson Common Stock A 206,445 - 1,568,290 D A
01 Apr, 2026 Ryan Bayer Common Stock A 5,607 - 37,380 D A
01 Apr, 2026 Scott Lee Kornblau Common Stock A 90,518 - 244,126 D A
01 Apr, 2026 Vivienne Schiffer Common Stock A 28,945 - 144,817 D A
01 Apr, 2026 Lawrence R Dickerson Common Stock D 86,217 - 0 D U
01 Apr, 2026 Christopher Gunsten Common Stock A 71,860 - 182,496 D A
01 Apr, 2026 Earl L Shipp Common Stock D 42,619 - 0 D U
01 Apr, 2026 Dana A Armstrong Common Stock D 8,436 - 0 D U
01 Apr, 2026 William H Hanson Common Stock A 13,631 - 90,853 D A
01 Apr, 2026 Scott Lee Kornblau Common Stock D 244,126 - 0 D U
01 Apr, 2026 David Johanson Common Stock A 71,860 - 191,598 D A
31 Mar, 2026 Ronald Steger Deferred Stock Units A 1,625 $0.00 45,068 D A
01 Apr, 2026 Lasse Petterson Common Stock D 1,568,290 - 0 D U
01 Apr, 2026 Christopher Gunsten Common Stock D 182,496 - 0 D U
01 Apr, 2026 Eleni Beyko Common Stock D 151,312 - 0 D U
01 Apr, 2026 Vivienne Schiffer Common Stock D 144,817 - 0 D U
01 Apr, 2026 William H Hanson Common Stock D 90,853 - 0 D U