GLDD (Great Lakes Dredge & Dock Corporation)
Insider Trading Activity
Every open-market purchase and sale reported by GLDD officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-01 | WILLIAM H HANSON | SVP, Market Development | MIXED | — | — |
| 2026-04-01 | Earl L Shipp | Director | U | — | — |
| 2026-04-01 | Dana A Armstrong | Director | U | — | — |
| 2026-04-01 | RYAN BAYER | VP & CAO | MIXED | — | — |
| 2026-04-01 | Scott Lee Kornblau | SVP & CFO | MIXED | — | — |
| 2026-04-01 | Ronald Steger | Director | U | — | — |
| 2026-04-01 | CHRISTOPHER GUNSTEN | SVP-Proj Svcs & Fleet Engineer | MIXED | — | — |
| 2026-04-01 | Lasse Petterson | CEO & President | MIXED | — | — |
| 2026-04-01 | Kathleen M Shanahan | Director | U | — | — |
| 2026-04-01 | LAWRENCE R DICKERSON | Director | U | — | — |
| 2026-04-01 | ELENI BEYKO | SVP - Offshore Energy | MIXED | — | — |
| 2026-04-01 | DAVID JOHANSON | SVP-Project Acquisition & Ops | MIXED | — | — |
| 2026-04-01 | Vivienne Schiffer | SVP, CLO, CCO & Corp Secretary | MIXED | — | — |
| 2026-03-25 | ELENI BEYKO | SVP - Offshore Energy | A | — | — |
| 2026-03-25 | ELENI BEYKO | SVP - Offshore Energy | F | — | — |
| 2026-03-25 | Scott Lee Kornblau | SVP & CFO | A | — | — |
| 2026-03-25 | DAVID JOHANSON | SVP-Project Acquisition & Ops | A | — | — |
| 2026-03-25 | CHRISTOPHER GUNSTEN | SVP-Proj Svcs & Fleet Engineer | A | — | — |
| 2026-03-25 | Vivienne Schiffer | SVP, CLO, CCO & Corp Secretary | A | — | — |
| 2026-03-25 | WILLIAM H HANSON | SVP, Market Development | A | — | — |
| 2026-03-25 | RYAN BAYER | VP & CAO | A | — | — |
| 2026-03-25 | Lasse Petterson | CEO & President | A | — | — |
| 2026-03-18 | WILLIAM H HANSON | SVP, Market Development | MIXED | — | — |
| 2026-03-18 | Vivienne Schiffer | SVP, CLO, CCO & Corp Secretary | MIXED | — | — |
| 2026-03-18 | Scott Lee Kornblau | SVP & CFO | MIXED | — | — |
| 2026-03-18 | RYAN BAYER | VP & CAO | MIXED | — | — |
| 2026-03-18 | CHRISTOPHER GUNSTEN | SVP-Proj Svcs & Fleet Engineer | MIXED | — | — |
| 2026-03-18 | DAVID JOHANSON | SVP-Project Acquisition & Ops | MIXED | — | — |
| 2026-03-18 | ELENI BEYKO | SVP - Offshore Energy | MIXED | — | — |
| 2026-03-18 | Lasse Petterson | CEO & President | MIXED | — | — |
| 2026-02-25 | Lasse Petterson | CEO & President | A | — | — |
| 2026-02-25 | Scott Lee Kornblau | SVP & CFO | A | — | — |
| 2026-02-25 | ELENI BEYKO | SVP - Offshore Energy | A | — | — |
| 2026-02-25 | CHRISTOPHER GUNSTEN | SVP-Proj Svcs & Fleet Engineer | A | — | — |
| 2026-02-25 | WILLIAM H HANSON | SVP, Market Development | A | — | — |
| 2026-02-25 | RYAN BAYER | VP & CAO | A | — | — |
| 2026-02-25 | DAVID JOHANSON | SVP-Project Acquisition & Ops | A | — | — |
| 2026-02-25 | Vivienne Schiffer | SVP, CLO, CCO & Corp Secretary | A | — | — |
| 2026-01-20 | Kathleen M Shanahan | Director | M | — | — |
| 2026-01-05 | Earl L Shipp | Director | A | — | — |
| 2026-01-05 | LAWRENCE R DICKERSON | Director | A | — | — |
| 2026-01-05 | Ronald Steger | Director | A | — | — |
| 2026-01-05 | Dana A Armstrong | Director | A | — | — |
| 2026-01-05 | Kathleen M Shanahan | Director | A | — | — |
| 2025-12-12 | DAVID JOHANSON | SVP-Project Acquisition & Ops | Sell | — | — |
| 2025-12-04 | DAVID JOHANSON | SVP-Project Acquisition & Ops | Sell | — | — |
| 2025-10-01 | Dana A Armstrong | Director | A | — | — |
| 2025-10-01 | Earl L Shipp | Director | A | — | — |
| 2025-10-01 | Ronald Steger | Director | A | — | — |
| 2025-10-01 | LAWRENCE R DICKERSON | Director | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 14,257,572 | — |
| — | 10%+ Owner | 2,608,885 | — |
| — | CEO & President | 1,568,290 | — |
| — | Director | 642,747 | — |
| — | CEO | 515,767 | — |
| — | Exec VP & COO | 444,053 | — |
| — | Director | 333,888 | — |
| — | Chief Operating Officer | 248,107 | — |
| — | Chief Financial Officer | 229,817 | — |
| — | Senior VP & CFO | 219,216 | — |
| — | SVP-Project Acquisition & Ops | 191,597 | — |
| — | Executive VP & COO | 175,568 | — |
| — | President - E&I Division | 160,915 | — |
| — | Director | 151,798 | — |
| — | President & CFO | 147,606 | — |
| — | Director | 137,578 | — |
| — | Director | 131,007 | — |
| — | Director | 125,463 | — |
| — | SVP & Chief Legal Officer | 119,687 | — |
| — | Director | 115,482 | — |
| — | Director | 97,526 | — |
| — | Director | 91,355 | — |
| — | Director | 89,209 | — |
| — | Chief Accounting Officer | 75,162 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the GLDD quote page; the site-wide leaderboard is on the insider transactions hub.