GLDD · Insider Trading
Great Lakes Dredge & Dock Corporation
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-01 | William H Hanson | SVP, Market Development | MIXED | −77,221 | — |
| 2026-04-01 | Earl L Shipp | Director | U | −42,619 | — |
| 2026-04-01 | Dana A Armstrong | Director | U | −8,436 | — |
| 2026-04-01 | Ryan Bayer | VP & CAO | MIXED | −31,773 | — |
| 2026-04-01 | Scott Lee Kornblau | SVP & CFO | MIXED | −153,608 | — |
| 2026-04-01 | Ronald Steger | Director | U | −20,404 | — |
| 2026-04-01 | Christopher Gunsten | SVP-Proj Svcs & Fleet Engineer | MIXED | −110,636 | — |
| 2026-04-01 | Lasse Petterson | CEO & President | MIXED | −1,361,845 | — |
| 2026-04-01 | Kathleen M Shanahan | Director | U | −76,375 | — |
| 2026-04-01 | Lawrence R Dickerson | Director | U | −86,217 | — |
| 2026-04-01 | Eleni Beyko | SVP - Offshore Energy | MIXED | −125,807 | — |
| 2026-04-01 | David Johanson | SVP-Project Acquisition & Ops | MIXED | −119,216 | +$5.64K |
| 2026-04-01 | Vivienne Schiffer | SVP, CLO, CCO & Corp Secretary | MIXED | −115,872 | — |
| 2026-03-25 | Eleni Beyko | SVP - Offshore Energy | A | +15,376 | — |
| 2026-03-25 | Eleni Beyko | SVP - Offshore Energy | F | −8,088 | −$106.11K |
| 2026-03-25 | Scott Lee Kornblau | SVP & CFO | A | +25,058 | — |
| 2026-03-25 | David Johanson | SVP-Project Acquisition & Ops | A | +13,179 | — |
| 2026-03-25 | Christopher Gunsten | SVP-Proj Svcs & Fleet Engineer | A | +13,179 | — |
| 2026-03-25 | Vivienne Schiffer | SVP, CLO, CCO & Corp Secretary | A | +18,035 | — |
| 2026-03-25 | William H Hanson | SVP, Market Development | A | +8,237 | — |
| 2026-03-25 | Ryan Bayer | VP & CAO | A | +10,126 | — |
| 2026-03-25 | Lasse Petterson | CEO & President | A | +125,145 | — |
| 2026-03-18 | William H Hanson | SVP, Market Development | MIXED | +8,236 | −$82.26K |
| 2026-03-18 | Vivienne Schiffer | SVP, CLO, CCO & Corp Secretary | MIXED | +14,542 | −$171.42K |
| 2026-03-18 | Scott Lee Kornblau | SVP & CFO | MIXED | +14,875 | −$376.83K |
| 2026-03-18 | Ryan Bayer | VP & CAO | MIXED | +34 | −$36.16K |
| 2026-03-18 | Christopher Gunsten | SVP-Proj Svcs & Fleet Engineer | MIXED | +10,696 | −$175.97K |
| 2026-03-18 | David Johanson | SVP-Project Acquisition & Ops | MIXED | +13,265 | −$132.48K |
| 2026-03-18 | Eleni Beyko | SVP - Offshore Energy | MIXED | +12,061 | −$212.39K |
| 2026-03-18 | Lasse Petterson | CEO & President | MIXED | +69,643 | −$1.76M |
| 2026-02-25 | Lasse Petterson | CEO & President | A | +132,825 | — |
| 2026-02-25 | Scott Lee Kornblau | SVP & CFO | A | +26,603 | — |
| 2026-02-25 | Eleni Beyko | SVP - Offshore Energy | A | +16,320 | — |
| 2026-02-25 | Christopher Gunsten | SVP-Proj Svcs & Fleet Engineer | A | +13,988 | — |
| 2026-02-25 | William H Hanson | SVP, Market Development | A | +8 | — |
| 2026-02-25 | Ryan Bayer | VP & CAO | A | +7,165 | — |
| 2026-02-25 | David Johanson | SVP-Project Acquisition & Ops | A | +13,988 | — |
| 2026-02-25 | Vivienne Schiffer | SVP, CLO, CCO & Corp Secretary | A | +19,149 | — |
| 2026-01-20 | Kathleen M Shanahan | Director | M | +5,851 | — |
| 2026-01-05 | Earl L Shipp | Director | A | +1,829 | — |
| 2026-01-05 | Lawrence R Dickerson | Director | A | — | — |
| 2026-01-05 | Ronald Steger | Director | A | — | — |
| 2026-01-05 | Dana A Armstrong | Director | A | +1,829 | — |
| 2026-01-05 | Kathleen M Shanahan | Director | A | — | — |
| 2025-12-12 | David Johanson | SVP-Project Acquisition & Ops | Sell | −2,100 | −$29.31K |
| 2025-12-04 | David Johanson | SVP-Project Acquisition & Ops | Sell | −10,000 | −$130.16K |
| 2025-10-01 | Dana A Armstrong | Director | A | +2,002 | — |
| 2025-10-01 | Earl L Shipp | Director | A | +2,002 | — |
| 2025-10-01 | Ronald Steger | Director | A | — | — |
| 2025-10-01 | Lawrence R Dickerson | Director | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Lasse Petterson | CEO & President | 1,568,290 | $26.66M |
| David Johanson | SVP-Project Acquisition & Ops | 191,597 | $3.26M |
| D Michael Steuert | Director | 89,209 | $1.52M |
| Ryan Bayer | VP & CAO | 37,380 | $635.46K |
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.
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.