According to recent filings covering the 90 days ending February 19, 2026, the three most significant insider holders at Great Lakes Dredge & Dock are Ceo & President Lasse Petterson (1.16Mn shares), Director Ryan Levenson (333.89K shares), Chief Operating Officer David E Simonelli (245.87K shares).
| 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 |
| 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 | 76,375 | 20 Jan, 2026 | |
| 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 | 42,619 | 05 Jan, 2026 | |
| 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 | 8,436 | 05 Jan, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 15 Jan, 2026 | Kathleen M Shanahan | Common Stock | A | 2,849 | $0.00 | 73,373 | D | M |
| 15 Jan, 2026 | Kathleen M Shanahan | Common Stock | A | 3,002 | $0.00 | 76,375 | D | M |
| 31 Dec, 2025 | Earl L Shipp | Common Stock | A | 1,829 | $0.00 | 42,619 | D | A |
| 31 Dec, 2025 | Dana A Armstrong | Common Stock | A | 1,829 | $0.00 | 8,436 | D | A |
| 31 Dec, 2025 | Dana A Armstrong | - | - | 8,436 | D | |||
| 10 Dec, 2025 | David Johanson | Common Stock | D | 2,100 | $13.96 | 91,963 | D | S |
| 03 Dec, 2025 | David Johanson | - | - | 94,063 | D | |||
| 03 Dec, 2025 | David Johanson | Common Stock | D | 10,000 | $13.02 | 94,063 | D | S |
| 30 Sep, 2025 | Earl L Shipp | Common Stock | A | 2,002 | $0.00 | 40,790 | D | A |
| 30 Sep, 2025 | Dana A Armstrong | Common Stock | A | 2,002 | $0.00 | 6,607 | D | A |
| 11 Aug, 2025 | Scott Lee Kornblau | Common Stock | D | 59,805 | $11.48 | 112,130 | D | S |
| 11 Aug, 2025 | Scott Lee Kornblau | - | - | 112,130 | D | |||
| 30 Jun, 2025 | Earl L Shipp | Common Stock | A | 1,969 | $0.00 | 38,788 | D | A |
| 30 Jun, 2025 | Dana A Armstrong | Common Stock | A | 1,969 | $0.00 | 4,605 | 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 | Lasse Petterson | Common Stock | A | 125,145 | - | 1,159,377 | D | A |
| 08 May, 2025 | Scott Lee Kornblau | Common Stock | A | 25,058 | - | 171,935 | D | A |
| 08 May, 2025 | William H Hanson | Common Stock | A | 8,237 | - | 68,977 | D | A |
| 08 May, 2025 | Vivienne Schiffer | Common Stock | A | 18,035 | - | 82,181 | D | A |