List of insiders holdings for Great Lakes Dredge & Dock CORP:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | Leight Nathan Director | 2015-10-01 17:55:23 | 275,497 1,992,385 | 2,267,882 | Form 4 |
| 2 | Hound Partners LLC Hound Performance LLC AUERBACH JONATHAN A G 10% Owner | 2010-02-16 14:53:54 | 2,140,186 0 | 2,140,186 | Form 13G |
| 3 | Petterson Lasse CEO & President | 2025-05-12 17:57:20 | 1,159,377 0 | 1,159,377 | Form 4 |
| 4 | Weiss Jason Director | 2018-04-02 20:14:22 | 125,363 666,662 | 792,025 | Form 4 |
| 5 | Berger Jonathan W CEO | 2016-03-17 17:51:24 | 515,567 200 | 515,767 | Form 4 |
| 6 | Lowry Richard M Exec VP & COO | 2009-05-15 11:25:29 | 500,724 0 | 500,724 | Form 4 |
| 7 | Levenson Ryan Director | 2024-04-01 18:38:37 | 119,072 333,888 | 452,960 | Form 4 |
| 8 | Simonelli David E Chief Operating Officer | 2022-06-10 17:00:53 | 248,107 0 | 248,107 | Form 4/A |
| 9 | Biemeck Bruce J President & CFO | 2012-06-08 17:26:32 | 242,142 0 | 242,142 | Form 4 |
| 10 | Marinko Mark W. Chief Financial Officer | 2021-03-16 18:35:36 | 223,774 0 | 223,774 | Form 4 |
| 11 | Johnson Kyle D Executive VP & COO | 2017-03-10 18:21:33 | 175,568 0 | 175,568 | Form 4 |
| 12 | Shea Christopher P President - E&I Division | 2018-03-12 19:35:22 | 160,915 0 | 160,915 | Form 4 |
| 13 | DICKERSON LAWRENCE R Director | 2025-07-01 17:09:03 | 152,270 0 | 152,270 | Form 4 |
| 14 | ALBERT CARL A Director | 2019-04-02 19:04:43 | 141,798 10,000 | 151,798 | Form 4 |
| 15 | Deutsch Peter Director | 2017-04-04 18:31:41 | 137,578 0 | 137,578 | Form 4 |
| 16 | Uhler Robert B Director | 2018-04-02 20:01:50 | 131,007 0 | 131,007 | Form 4 |
| 17 | LaVoy Kathleen Mackie SVP & Chief Legal Officer | 2020-12-15 17:00:14 | 119,687 0 | 119,687 | Form 4 |
| 18 | Bittel Stephen Director | 2015-01-05 17:21:12 | 64,089 51,393 | 115,482 | Form 4 |
| 19 | Kornblau Scott Lee SVP & CFO | 2025-08-13 17:17:25 | 112,130 0 | 112,130 | Form 4 |
| 20 | Wensel Deborah A Senior VP & CFO | 2010-06-08 17:57:45 | 108,198 0 | 108,198 | Form 4 |
| 21 | JOHANSON DAVID SVP-Project Acquisition & Ops | 2025-05-12 17:41:51 | 104,063 0 | 104,063 | Form 4 |
| 22 | Mackie Douglas B Director | 2014-04-02 20:11:11 | 99,648 0 | 99,648 | Form 4 |
| 23 | Walsh Michael Joseph Director | 2020-04-02 20:03:38 | 91,355 0 | 91,355 | Form 4 |
| 24 | BEYKO ELENI SVP - Offshore Energy | 2025-05-12 18:14:04 | 90,138 0 | 90,138 | Form 4 |
| 25 | STEUERT D MICHAEL Director | 2025-04-28 18:24:30 | 89,209 0 | 89,209 | Form 4/A |
| 26 | GUNSTEN CHRISTOPHER SVP-Proj Svcs & Fleet Engineer | 2025-05-12 17:46:17 | 85,952 0 | 85,952 | Form 4 |
| 27 | Schiffer Vivienne SVP, CLO, CCO & Corp Secretary | 2025-05-12 17:51:22 | 82,181 0 | 82,181 | Form 4 |
| 28 | Shanahan Kathleen M Director | 2025-07-01 17:13:01 | 81,195 0 | 81,195 | Form 4 |
| 29 | Karas John F Senior Vice President | 2012-06-08 17:25:32 | 73,097 0 | 73,097 | Form 4 |
| 30 | Waryjas Maryann SVP & Chief Legal Officer | 2015-06-15 17:34:47 | 72,624 0 | 72,624 | Form 4 |
| 31 | CYR ANNETTE W Chief HR & Admin Officer | 2020-03-27 16:26:41 | 71,881 0 | 71,881 | Form 3 |
| 32 | HANSON WILLIAM H SVP, Market Development | 2025-05-12 17:38:08 | 68,977 0 | 68,977 | Form 4 |
| 33 | Lightfoot Todd M Chief Accounting Officer | 2023-05-09 17:24:15 | 25,252 41,510 | 66,763 | Form 4 |
| 34 | Steger Ronald Director | 2025-07-01 17:21:21 | 59,437 0 | 59,437 | Form 4 |
| 35 | Gillespie Christopher J VP - Int'l & Special Projects | 2009-05-15 11:24:33 | 49,863 0 | 49,863 | Form 4 |
| 36 | Hansen Bradley T.J. VP - Division Manager | 2009-08-21 14:49:23 | 47,763 0 | 47,763 | Form 4 |
| 37 | Becker Steven W VP - Plant Equipment Mgr & CME | 2009-05-15 11:27:00 | 45,540 0 | 45,540 | Form 4 |
| 38 | Pagendarm William F VP - Division Manager | 2009-08-21 14:50:31 | 44,848 0 | 44,848 | Form 4 |
| 39 | Pegg Stephen Elra Senior Vice President | 2013-03-11 18:44:16 | 43,348 0 | 43,348 | Form 4 |
| 40 | Steckel William SVP & Chief Financial Officer | 2013-05-09 20:24:35 | 40,687 0 | 40,687 | Form 4 |
| 41 | Tastard James SVP & CHRAO | 2023-05-09 17:16:29 | 39,734 0 | 39,734 | Form 4 |
| 42 | Shipp Earl L Director | 2025-07-01 17:16:14 | 38,788 0 | 38,788 | Form 4 |
| 43 | Dorward-King Elaine J Director | 2023-07-03 16:00:22 | 35,710 0 | 35,710 | Form 4 |
| 44 | William Hanson H. VP - US Business Development | 2009-08-21 14:50:07 | 26,271 0 | 26,271 | Form 4 |
| 45 | O'Hara Steven F. VP - Division Manager | 2009-05-15 11:27:46 | 25,127 0 | 25,127 | Form 4 |
| 46 | Hayes Katherine M Interim CFO | 2014-05-13 17:44:04 | 25,040 0 | 25,040 | Form 4 |
| 47 | BAYER RYAN VP & CAO | 2025-05-12 17:28:27 | 24,574 0 | 24,574 | Form 4 |
| 48 | Dickins Denise Director | 2015-10-01 17:49:51 | 23,783 0 | 23,783 | Form 4 |
| 49 | SOULELES THOMAS S Director | 2011-01-04 17:23:14 | 4,809 10,680 | 15,489 | Form 4 |
| 50 | Armstrong Dana A Director | 2025-07-01 17:05:42 | 4,605 0 | 4,605 | Form 4 |
| 51 | GRISSOM DOUGLAS C Director | 2009-08-21 12:20:40 | 0 0 | 0 | Form 4 |
| 52 | MADISON DEARBORN CAPITAL PARTNERS IV LP MADISON DEARBORN PARTNERS IV LP MADISON DEARBORN PARTNERS LLC 10% Owner | 2009-08-21 15:19:00 | 0 0 | 0 | Form 13D |