NASDAQ:GLDD

Great Lakes Dredge & Dock Stock Insider Trading

Industrials > Engineering & Construction

Buy GLDD

*Your capital is at risk

$17.00

+0 (+0%)

At Close: Jun 03, 2026

Great Lakes Dredge & Dock Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 40.60. In total, the insiders bought 1.11M and sold 31.71B GLDD shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	40.60
● Buy	1.11M shares
● Sell	31.71B shares
51% Buy Activity Negligible or No Correlation
Sell Signal Low Confidence Apr 01, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory positive Insider Power Score of 40.6. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Apr 01, 2026 Sell	Common Stock U-Tender	Armstrong Dana A Director	Director	8 436 Value: $0
Apr 01, 2026 Sell	Deferred Stock Units D-Return	Dickerson Lawrence R Director	Director	76 962 Value: $1.31M
Apr 01, 2026 Sell	Common Stock U-Tender	Steger Ronald Director	Director	20 404 Value: $0
Apr 01, 2026 Sell	Common Stock U-Tender	Bayer Ryan Vp & Cao	Officer	37 380 Value: $0
Apr 01, 2026 Buy	Common Stock A-Award	Bayer Ryan Vp & Cao	Officer	5 607 Value: $95.3K
Apr 01, 2026 Sell	Common Stock U-Tender	Beyko Eleni SVP - Offshore Energy	Officer	151 312 Value: $0
Apr 01, 2026 Sell	Common Stock U-Tender	Gunsten Christopher SVP-proj Svcs & Fleet Engineer	Officer	182 496 Value: $0
Apr 01, 2026 Sell	Common Stock U-Tender	Schiffer Vivienne SVP, Clo, Cco & Corp Secretary	Officer	144 817 Value: $0
Apr 01, 2026 Buy	Common Stock A-Award	Schiffer Vivienne SVP, Clo, Cco & Corp Secretary	Officer	28 945 Value: $492.1K
Apr 01, 2026 Buy	Common Stock A-Award	Petterson Lasse CEO & President	CEO / President	206 445 Value: $3.51M
Apr 01, 2026 Sell	Common Stock U-Tender	Petterson Lasse CEO & President	CEO / President	1 568 290 Value: $0
Apr 01, 2026 Buy	Common Stock A-Award	Kornblau Scott Lee SVP & CFO	C-Suite Officer	90 518 Value: $1.54M
Apr 01, 2026 Sell	Common Stock U-Tender	Kornblau Scott Lee SVP & CFO	C-Suite Officer	244 126 Value: $0
Apr 01, 2026 Buy	Common Stock A-Award	Johanson David SVP-project Acquisition & Ops	Officer	71 860 Value: $1.22M
Apr 01, 2026 Sell	Common Stock U-Tender	Johanson David SVP-project Acquisition & Ops	Officer	191 598 Value: $0
Apr 01, 2026 Buy	Common Stock A-Award	Hanson William H SVP, Market Development	Officer	13 631 Value: $231.7K
Apr 01, 2026 Sell	Common Stock U-Tender	Hanson William H SVP, Market Development	Officer	90 853 Value: $0
Apr 01, 2026 Buy	Common Stock A-Award	Gunsten Christopher SVP-proj Svcs & Fleet Engineer	Officer	71 860 Value: $1.22M
Apr 01, 2026 Buy	Common Stock A-Award	Beyko Eleni SVP - Offshore Energy	Officer	25 505 Value: $433.6K
Apr 01, 2026 Sell	Deferred Stock Units D-Return	Steger Ronald Director	Director	45 068 Value: $766.2K
Apr 01, 2026 Sell	Common Stock U-Tender	Shipp Earl L Director	Director	42 619 Value: $0
Apr 01, 2026 Sell	Common Stock U-Tender	Shanahan Kathleen M Director	Director	76 375 Value: $0
Apr 01, 2026 Sell	Common Stock U-Tender	Dickerson Lawrence R Director	Director	86 217 Value: $0
Mar 31, 2026 Buy	Deferred Stock Units A-Award	Dickerson Lawrence R Director	Director	2 938 Value: $49.9K
Mar 31, 2026 Buy	Deferred Stock Units A-Award	Steger Ronald Director	Director	1 625 Value: $27.6K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT GREAT LAKES DREDGE & DOCK CORPORATION

Great Lakes Dredge & Dock Corporation provides dredging services in the United States. The company engages in capital dredging that consists of port expansion projects; coastal restoration and land reclamations; trench digging for pipelines, tunnels, and cables; and other dredging related to the construction of breakwaters, jetties, canals, and other marine structures. It is also involved in coastal protection projects that comprises of moving sa...

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