GLDD
insider transactionsGreat Lakes Dredge & Dock CORP — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
No open-market buys or sells this period. The trades below are grants, option exercises and gifts, which carry no market price.
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Other·U
SVP, CLO, CCO & Corp Secretary
—
144.8K sh
-
Grant·A
SVP, CLO, CCO & Corp Secretary
—
28.9K sh
Own +25%
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Other·U
Lasse Petterson KEY
CEO & President
—
1.6M sh
-
Grant·A
Lasse Petterson KEY
CEO & President
—
206.4K sh
Own +15%
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Other·U
SVP & CFO
—
244.1K sh
-
Grant·A
SVP & CFO
—
90.5K sh
Own +59%
-
Other·U
SVP-Project Acquisition & Ops
—
191.6K sh
-
Grant·A
SVP-Project Acquisition & Ops
—
71.9K sh
Own +60%
-
Other·U
SVP, Market Development
—
90.9K sh
-
Grant·A
SVP, Market Development
—
13.6K sh
Own +18%
-
Other·D
Director
—
45.1K sh
Own -100%
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Other·U
Director
—
20.4K sh
-
Other·U
Director
—
42.6K sh
-
Other·U
Director
—
76.4K sh
-
Other·U
SVP-Proj Svcs & Fleet Engineer
—
182.5K sh
-
Grant·A
SVP-Proj Svcs & Fleet Engineer
—
71.9K sh
Own +65%
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Other·U
SVP - Offshore Energy
—
151.3K sh
-
Grant·A
SVP - Offshore Energy
—
25.5K sh
Own +20%
-
Other·U
VP & CAO
—
37.4K sh
-
Grant·A
VP & CAO
—
5.6K sh
Own +18%
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Other·U
Director
—
8.4K sh
-
Grant·A
Director
$0
1.6K sh
Own +4%
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Other·D
Director
—
10.3K sh
Own -100%
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Grant·A
Director
$0
1.5K sh
Own +17%
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Other·F
Dana A Armstrong KEY
Executive Vice President and …
$65.7K
2.0K sh · $33.31
Own -3%
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Grant·A
SVP-Project Acquisition & Ops
$5.6K
521 sh · $10.82
Own +0%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Apr 1, 2026 | Vivienne Schiffer | Other U | 144.8K | — |
| Apr 1, 2026 | Vivienne Schiffer | Grant A | 28.9K | — |
| Apr 1, 2026 | Lasse Petterson KEY | Other U | 1.6M | — |
| Apr 1, 2026 | Lasse Petterson KEY | Grant A | 206.4K | — |
| Apr 1, 2026 | Scott Lee Kornblau KEY | Other U | 244.1K | — |
| Apr 1, 2026 | Scott Lee Kornblau KEY | Grant A | 90.5K | — |
| Apr 1, 2026 | David Johanson | Other U | 191.6K | — |
| Apr 1, 2026 | David Johanson | Grant A | 71.9K | — |
| Apr 1, 2026 | William H Hanson | Other U | 90.9K | — |
| Apr 1, 2026 | William H Hanson | Grant A | 13.6K | — |
| Apr 1, 2026 | Ronald Steger | Other D | 45.1K | — |
| Apr 1, 2026 | Ronald Steger | Other U | 20.4K | — |
| Apr 1, 2026 | Earl L Shipp | Other U | 42.6K | — |
| Apr 1, 2026 | Kathleen M Shanahan | Other U | 76.4K | — |
| Apr 1, 2026 | Christopher Gunsten | Other U | 182.5K | — |
| Apr 1, 2026 | Christopher Gunsten | Grant A | 71.9K | — |
| Apr 1, 2026 | Eleni Beyko | Other U | 151.3K | — |
| Apr 1, 2026 | Eleni Beyko | Grant A | 25.5K | — |
| Apr 1, 2026 | Ryan Bayer | Other U | 37.4K | — |
| Apr 1, 2026 | Ryan Bayer | Grant A | 5.6K | — |
| Apr 1, 2026 | Dana A Armstrong | Other U | 8.4K | — |
| Mar 31, 2026 | Ronald Steger | Grant A | 1.6K | $0 |
| Mar 31, 2026 | Kathleen M Shanahan | Other D | 10.3K | — |
| Mar 31, 2026 | Kathleen M Shanahan | Grant A | 1.5K | $0 |
| Mar 31, 2026 | Dana A Armstrong KEY | Other F | 2.0K | $65.7K |
| Mar 25, 2026 | David Johanson | Grant A | 521 | $5.6K |
About GLDD insider trading
This page tracks insider transactions for Great Lakes Dredge & Dock CORP (GLDD) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.