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Great Lakes Dredge & Dock CORP

GLDDDelisted
Industry
Heavy Construction Other Than Bldg Const - Contractors
SEC CIK
0001372020

Great Lakes Dredge & Dock CORP was delisted in 2026; its insiders filed their last Form 4 on Apr 1, 2026; 182 institutions reported holding it in 13F filings for Q1 2026, worth $931.0M in total; no superinvestor held it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Great Lakes Dredge & Dock CORP insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Great Lakes Dredge & Dock CORP, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Great Lakes Dredge & Dock CORP
NameTitleLast reported holdingLast filingFilings, past year
Dickerson Lawrence RDirector0Apr 1, 20263
Shanahan Kathleen MDirector0Apr 1, 20264
Petterson LasseCEO & President0Apr 1, 20264
Steger RonaldDirector0Apr 1, 20263
Shipp Earl LDirector0Apr 1, 20263
Kornblau Scott LeeSVP & CFO0Apr 1, 20264
Hanson William HSVP, Market Development0Apr 1, 20264
Schiffer VivienneSVP, CLO, CCO & Corp Secretary0Apr 1, 20264
Armstrong Dana ADirector0Apr 1, 20263
Beyko EleniSVP - Offshore Energy0Apr 1, 20265
Gunsten ChristopherSVP-Proj Svcs & Fleet Engineer0Apr 1, 20264
Johanson DavidSVP-Project Acquisition & Ops0Apr 1, 20266
Bayer RyanVP & CAO0Apr 1, 20264
Steuert D MichaelDirector89,209Apr 28, 20250
Levenson RyanDirector333,888IndirectApr 1, 20240
Dorward-King Elaine JDirector35,710Jul 3, 20230
Tastard JamesSVP & CHRAO39,734May 9, 20230
Lightfoot Todd MChief Accounting Officer41,510IndirectMay 9, 20230
Simonelli David EChief Operating Officer248,107Jun 10, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Dec 12, 2025 (view filing)Dec 102 daysJohanson DavidSVP-Project Acquisition & OpsSSale−2.10K$13.96−$29.3K−2.2%92.0K after10b5-1
Dec 4, 2025 (view filing)Dec 31 dayJohanson DavidSVP-Project Acquisition & OpsSSale−10.0K$13.02−$130.2K−9.6%94.1K after10b5-1
Aug 13, 2025 (view filing)Aug 112 daysKornblau Scott LeeSVP & CFOSSale−59.8K$11.48−$686.6K−34.8%112.1K after10b5-1
Jun 4, 2025 (view filing)Jun 31 daySteger RonaldDirectorSSale−5.00K$11.59−$58.0K−19.7%20.4K after
May 8, 2025 (view filing)May 62 daysBeyko EleniSVP - Offshore EnergySSale−22.6K$10.26−$231.7K−31.1%50.1K after10b5-1
Mar 5, 2025 (view filing)Mar 41 dayGunsten ChristopherSVP-Proj Svcs & Fleet EngineerPPurchase+3.88K$7.75+$30.0K+6.7%61.5K after
Nov 15, 2024 (view filing)Nov 141 dayDickerson Lawrence RDirectorSSale−15.9K$12.04−$191.9K−16.2%82.1K after
Nov 13, 2024 (view filing)Nov 121 dayDickerson Lawrence RDirectorSSale−5.32K$12.61−$67.1K−5.1%98.1K after
Nov 12, 2024 (view filing)Nov 111 dayShanahan Kathleen MDirectorSSale−23.2K$12.63−$293.5K−25.6%67.7K after
Nov 12, 2024 (view filing)Nov 111 daySteger RonaldDirectorSSale−12.0K$12.76−$153.1K−32.1%25.4K after
Aug 26, 2024 (view filing)Aug 23-263 daysPetterson LasseCEO & PresidentSSale−75.2K$9.14−$687.6K−7.7%902.4K after2 lots10b5-1
Aug 21, 2024 (view filing)Aug 19-202 daysPetterson LasseCEO & PresidentSSale−63.9K$9.07−$579.5K−6.1%977.6K after2 lots10b5-1
Aug 19, 2024 (view filing)Aug 15-164 daysPetterson LasseCEO & PresidentSSale−110.9K$9.09−$1.01M−9.6%1.04M after2 lots10b5-1
May 19, 2023 (view filing)May 17-192 daysLevenson RyanDirectorPPurchase+133.8K$6.81+$911.0K+66.9%333.9K after3 lots
May 15, 2023 (view filing)May 123 daysLevenson RyanDirectorPPurchase+68.0K$6.10+$414.8K+51.5%200.1K after
May 12, 2023 (view filing)May 10-112 daysLevenson RyanDirectorPPurchase+132.0K$6.09+$803.9K+132,000.0%132.1K after2 lots
Mar 3, 2023 (view filing)Mar 21 dayShipp Earl LDirectorPPurchase+2.00K$5.51+$11.0K+15.9%14.6K after
Aug 5, 2022 (view filing)Aug 5Same dayPetterson LasseCEO & PresidentPPurchase+10.0K$9.65+$96.5K+1.0%1.00M after
May 11, 2022 (view filing)May 92 daysSimonelli David EChief Operating OfficerSSale−17.7K$14.12−$249.9K−6.7%245.9K after
Mar 2, 2022 (view filing)Feb 282 daysHanson William HSVP, Gov't Relations & Bus DevSSale−1.12K$14.06−$15.7K−3.8%28.7K after
Nov 16, 2021 (view filing)Nov 12-154 daysSimonelli David EChief Operating OfficerSSale−5.00K$15.84−$79.2K−2.4%202.1K after2 lots
Nov 2, 2021 (view filing)Oct 29-Nov 14 daysSimonelli David EChief Operating OfficerSSale−5.00K$15.37−$76.8K−2.4%207.1K after2 lots
Oct 25, 2021 (view filing)Oct 214 daysDickerson Lawrence RDirectorSSale−1.52K$14.59−$22.1K−1.7%85.6K after
Aug 31, 2021 (view filing)Aug 274 daysSimonelli David EChief Operating OfficerSSale−21.1K$14.97−$315.3K−9.0%212.1K after
Aug 18, 2021 (view filing)Aug 162 daysSimonelli David EChief Operating OfficerSSale−21.2K$14.90−$316.3K−8.3%233.1K after
Aug 16, 2021 (view filing)Aug 133 daysSimonelli David EChief Operating OfficerSSale−7.57K$14.85−$112.4K−3.1%233.1K after
Aug 12, 2021 (view filing)Aug 66 daysLateShipp Earl LDirectorPPurchase+1.50K$14.58+$21.9KNew position1.50K after
Jul 14, 2021 (view filing)Jul 122 daysDickerson Lawrence RDirectorSSale−1.57K$14.50−$22.7K−1.8%84.1K after
Jul 2, 2021 (view filing)Jun 11, 2020386 daysLevenson RyanDirectorSSale−41.9K$9.33−$390.7K−21.8%150.2K afterAmended