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.

Form 4 Filings
50
most recent
Open-Market Buys
0
code P
Sales
2
code S
Reporting Insiders
24
current holders
GLDD — Recent Form 4 Transactions (latest 2026-04-01)
FiledInsiderRole TypeSharesValue
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
GLDD — Current Insider Holders
InsiderRole Shares HeldValue
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
How to read Form 4 activity

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.