Great Lakes Dredge & Dock CORP (GLDD) Insider Trading

Last 12 months

Insiders sold $160k and bought nothing on the open market.

All of the selling was scheduled in advance under 10b5-1 plans. The last open-market buy by an executive or director was in Mar 2025.

Net open-market

−$160k

0 buys · 2 sales

Under a 10b5-1 plan

100%

of the value sold

Insiders who bought / sold

0 / 1

executives and directors

Last open-market buy

Mar 2025

Mar 4, 2025

Get an email when GLDD's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Dec 10, 2025	David Johanson SVP-Project Acquisition & Ops	Sold10b5-1 plan	2,100	$13.96	$29k	2.2%	Form 4
Dec 3, 2025	David Johanson SVP-Project Acquisition & Ops	Sold10b5-1 plan	10,000	$13.02	$130k	9.6%	Form 4
Aug 11, 2025	Scott Lee Kornblau SVP & CFO	Sold10b5-1 plan	59,805	$11.48	$687k	35%	Form 4
Jun 3, 2025	Ronald Steger Director	SoldNo plan	5,000	$11.59	$58k	20%	Form 4
May 6, 2025	Eleni Beyko SVP - Offshore Energy	Sold10b5-1 plan	22,579	$10.26	$232k	31%	Form 4
Mar 4, 2025	Christopher Gunsten SVP-Proj Svcs & Fleet Engineer	Bought	3,875	$7.75	$30k	6.7%	Form 4
Nov 14, 2024	Lawrence R Dickerson Director	SoldNo plan	15,936	$12.04	$192k	16%	Form 4
Nov 12, 2024	Lawrence R Dickerson Director	SoldNo plan	5,323	$12.61	$67k	5.1%	Form 4
Nov 11, 2024	Kathleen M Shanahan Director	SoldNo plan	23,238	$12.63	$293k	26%	Form 4
Nov 11, 2024	Ronald Steger Director	SoldNo plan	12,000	$12.76	$153k	32%	Form 4

Dec 10, 202510b5-1 plan
David Johanson
SVP-Project Acquisition & Ops · sold 2,100 at $13.96
$29k
2.2% of stake
Dec 3, 202510b5-1 plan
David Johanson
SVP-Project Acquisition & Ops · sold 10,000 at $13.02
$130k
9.6% of stake
Aug 11, 202510b5-1 plan
Scott Lee Kornblau
SVP & CFO · sold 59,805 at $11.48
$687k
35% of stake
Jun 3, 2025No plan
Ronald Steger
Director · sold 5,000 at $11.59
$58k
20% of stake
May 6, 202510b5-1 plan
Eleni Beyko
SVP - Offshore Energy · sold 22,579 at $10.26
$232k
31% of stake
Mar 4, 2025
Christopher Gunsten
SVP-Proj Svcs & Fleet Engineer · bought 3,875 at $7.75
$30k
6.7% of stake
Nov 14, 2024No plan
Lawrence R Dickerson
Director · sold 15,936 at $12.04
$192k
16% of stake
Nov 12, 2024No plan
Lawrence R Dickerson
Director · sold 5,323 at $12.61
$67k
5.1% of stake
Nov 11, 2024No plan
Kathleen M Shanahan
Director · sold 23,238 at $12.63
$293k
26% of stake
Nov 11, 2024No plan
Ronald Steger
Director · sold 12,000 at $12.76
$153k
32% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch GLDD, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in GLDD's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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