Great Lakes Dredge & Dock's top three insider shareholders as of March 23, 2026 are Lasse Petterson (Ceo President, 1.29Mn shares), Ryan Levenson (Director, 333.89K shares), David E Simonelli (Chief Operating Officer, 245.87K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Lasse Petterson | Ceo President | 1,361,845 | 0 | 18 Mar, 2026 |
| Ryan Levenson | 0 | 333,888 | 19 May, 2023 | |
| David E Simonelli | Chief Operating Officer | 245,866 | 0 | 11 May, 2022 |
| Scott Lee Kornblau | Svp Cfo | 153,608 | 0 | 18 Mar, 2026 |
| Eleni Beyko | Svp Offshore Energy | 133,895 | 0 | 18 Mar, 2026 |
| David Johanson | Svp Project Acquisition Ops | 119,216 | 0 | 18 Mar, 2026 |
| Vivienne Schiffer | Svp, Clo, Cco Corp Secretary | 115,872 | 0 | 18 Mar, 2026 |
| Christopher Gunsten | Svp Proj Svcs Fleet Engineer | 110,636 | 0 | 18 Mar, 2026 |
| D Michael Steuert | 89,209 | 0 | 28 Apr, 2025 | |
| William H Hanson | Svp, Market Development | 77,222 | 0 | 18 Mar, 2026 |
| Kathleen M Shanahan | 76,375 | 0 | 20 Jan, 2026 | |
| Todd M Lightfoot | Chief Accounting Officer | 25,252 | 41,510 | 09 May, 2023 |
| Earl L Shipp | 42,619 | 0 | 05 Jan, 2026 | |
| James Tastard | Svp Chrao | 39,734 | 0 | 09 May, 2023 |
| Ryan Bayer | Vp Cao | 31,773 | 0 | 18 Mar, 2026 |
| Ronald Steger | 20,404 | 0 | 04 Jun, 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.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 16 Mar, 2026 | Ryan Bayer | Common Stock | D | 1,282 | $16.93 | 30,457 | D | F |
| 16 Mar, 2026 | David Johanson | Common Stock | D | 1,659 | $16.93 | 104,292 | D | F |
| 16 Mar, 2026 | Scott Lee Kornblau | Common Stock | D | 4,719 | $16.93 | 134,014 | D | F |
| 16 Mar, 2026 | William H Hanson | Common Stock | D | 1,030 | $16.93 | 67,956 | D | F |
| 16 Mar, 2026 | Eleni Beyko | Common Stock | D | 2,645 | $16.93 | 119,189 | D | F |
| 16 Mar, 2026 | Christopher Gunsten | Common Stock | D | 2,204 | $16.93 | 97,736 | D | F |
| 16 Mar, 2026 | Lasse Petterson | Common Stock | A | 94,540 | - | 1,386,742 | D | A |
| 16 Mar, 2026 | Vivienne Schiffer | Common Stock | D | 2,060 | $16.93 | 99,270 | D | F |
| 16 Mar, 2026 | Scott Lee Kornblau | Common Stock | A | 22,265 | - | 156,279 | D | A |
| 16 Mar, 2026 | Lasse Petterson | Common Stock | D | 37,202 | $16.93 | 1,349,540 | D | F |
| 16 Mar, 2026 | David Johanson | Common Stock | A | 12,646 | - | 116,938 | D | A |
| 16 Mar, 2026 | Eleni Beyko | Common Stock | A | 14,754 | - | 133,943 | D | A |
| 16 Mar, 2026 | William H Hanson | Common Stock | A | 7,853 | - | 75,809 | D | A |
| 16 Mar, 2026 | Vivienne Schiffer | Common Stock | A | 14,213 | - | 113,483 | D | A |
| 16 Mar, 2026 | Ryan Bayer | Common Stock | A | 2,170 | - | 32,627 | D | A |
| 16 Mar, 2026 | Christopher Gunsten | Common Stock | A | 12,646 | - | 110,382 | D | A |
| 16 Mar, 2026 | Scott Lee Kornblau | Common Stock | D | 8,762 | $16.93 | 147,517 | D | F |
| 16 Mar, 2026 | William H Hanson | Common Stock | D | 1,913 | $16.93 | 73,896 | D | F |
| 16 Mar, 2026 | Christopher Gunsten | Common Stock | D | 4,091 | $16.93 | 106,291 | D | F |
| 16 Mar, 2026 | Lasse Petterson | Common Stock | D | 20,033 | $16.93 | 1,329,507 | D | F |