Great Lakes Dredge & Dock CORP (GLDD) Insider Ownership

Historic Ownership Trends

Data spanning the past 90 days through December 17, 2025 reveals that Great Lakes Dredge & Dock's three principal insider shareholders consist of SVP Project Acquisition & Ops David Johanson (91.96K shares), Director Kathleen M Shanahan (70.52K shares), Chief Accounting Officer Todd M Lightfoot (66.76K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Lasse Petterson CEO & President 1,159,377 12 May, 2025
Ryan Levenson 333,888 19 May, 2023
David E Simonelli Chief Operating Officer 245,866 11 May, 2022
Mark W. Marinko Chief Financial Officer 223,774 16 Mar, 2021
Scott Lee Kornblau SVP & Cfo 112,130 13 Aug, 2025
David Johanson SVP Project Acquisition & Ops 91,963 12 Dec, 2025
Eleni Beyko SVP Offshore Energy 90,138 12 May, 2025
D Michael Steuert 89,209 28 Apr, 2025
Lawrence R Dickerson 86,217 03 Jan, 2025
Christopher Gunsten SVP Proj Svcs & Fleet Engineer 85,952 12 May, 2025
Vivienne Schiffer SVP And Clo And Cco & Corp Secretary 82,181 12 May, 2025
Kathleen M Shanahan 70,524 16 Jan, 2025
William H Hanson SVP And Market Development 68,977 12 May, 2025
Todd M Lightfoot Chief Accounting Officer 66,763 09 May, 2023
Earl L Shipp 40,790 01 Oct, 2025
James Tastard SVP & Chrao 39,734 09 May, 2023
Elaine J Dorward-King 35,710 03 Jul, 2023
Ryan Bayer VP & Cao 24,574 12 May, 2025
Ronald Steger 20,404 04 Jun, 2025
Dana A Armstrong 6,607 01 Oct, 2025

* 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
10 Dec, 2025 David Johanson Common Stock D 2,100 $13.96 91,963 D S
03 Dec, 2025 David Johanson Common Stock D 10,000 $13.02 94,063 D S
30 Sep, 2025 Dana A Armstrong - - 6,607 D
30 Sep, 2025 Dana A Armstrong Common Stock A 2,002 $0.00 6,607 D A
30 Sep, 2025 Earl L Shipp Common Stock A 2,002 $0.00 40,790 D A
11 Aug, 2025 Scott Lee Kornblau - - 112,130 D
11 Aug, 2025 Scott Lee Kornblau Common Stock D 59,805 $11.48 112,130 D S
30 Jun, 2025 Dana A Armstrong Common Stock A 1,969 $0.00 4,605 D A
30 Jun, 2025 Earl L Shipp Common Stock A 1,969 $0.00 38,788 D A
03 Jun, 2025 Ronald Steger - - 20,404 D
03 Jun, 2025 Ronald Steger Common Stock D 5,000 $11.58 20,404 D S
08 May, 2025 Eleni Beyko Common Stock A 25,000 - 75,138 D A
08 May, 2025 William H Hanson Common Stock A 8,237 - 68,977 D A
08 May, 2025 Lasse Petterson Common Stock A 125,145 - 1,159,377 D A
08 May, 2025 Vivienne Schiffer Common Stock A 18,035 - 82,181 D A
08 May, 2025 Christopher Gunsten Common Stock A 13,179 - 85,952 D A
08 May, 2025 David Johanson Common Stock A 13,179 - 104,063 D A
08 May, 2025 Scott Lee Kornblau Common Stock A 25,058 - 171,935 D A
08 May, 2025 Ryan Bayer Common Stock A 10,126 - 24,574 D A
08 May, 2025 Eleni Beyko Common Stock A 15,376 - 105,514 D A