GLDD insider trading
NasdaqGS IndustrialsGreat Lakes Dredge & Dock CORP — scored insider trade history from SEC Form 4 filings, parsed and contextualised by FilingIQ.
About Great Lakes Dredge & Dock CORP
Great Lakes Dredge & Dock Corporation provides dredging services in the United States. The company offers 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 comprising moving sand from the ocean floor to shoreline locations where erosion threatens shoreline assets; maintenance dredging, which consists of the re-dredging of previously deepened waterways and harbors to remove silt, sand, and other accumulated sediments; lake and river dredging, inland levee and construction dredging, environmental restoration and habitat improvement, and other marine construction projects; and foreign capital projects, such as channel deepening and port infrastructure development. In addition, the company operates hydraulic dredges, hopper dredges, mechanical dredges, unloaders, drill boats, and material and other barges equipment. It serves federal, state, and local governments; foreign governments; and domestic and foreign private concerns comprising utilities, oil and gas, and other energy companies. The company was formerly known as Lydon & Drews Partnership and changed its name to Great Lakes Dredge & Dock Corporation in 1905. Great Lakes Dredge & Dock Corporation was founded in 1890 and is headquartered in Houston, Texas.
Company website: www.gldd.com
GLDD insider activity at a glance
FilingIQ has scored 807 insider transactions for GLDD since Mar 13, 2015. The most recent filing in our index is dated Apr 1, 2026.
Across the full history, 79 open-market purchases
and 107 open-market sales
were filed under transaction codes P and S respectively. Compensatory share awards
(code A) and option exercises (code M) are tracked separately and not counted here.
The average FilingIQ composite score on GLDD insider trades is 55.3/100, produced by FilingIQ's multi-factor Form 4 model. Model framework documented at methodology.
Latest GLDD Form 4 filings
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13F funds holding GLDD
Frequently asked
- How many insider trades does FilingIQ track for GLDD?
- FilingIQ tracks 807 Form 4 insider transactions for GLDD (Great Lakes Dredge & Dock CORP), covering filings from Mar 13, 2015 onwards. 81 of those were filed in the last 90 days.
- Are GLDD insiders net buyers or net sellers?
- Across the full Form 4 history for GLDD, 79 transactions (10%) were open-market purchases and 107 (13%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.
- Where does GLDD insider data come from?
- Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.
- What sector is GLDD in?
- Great Lakes Dredge & Dock CORP (GLDD) is classified in the Industrials sector, specifically Engineering & Construction, with a current market capitalisation of $1.15B.
Methodology & sources
Every GLDD insider transaction shown on FilingIQ is parsed directly from a public SEC Form 4 XML filing. Insider identity is normalised across reporting variants (CIK changes, name spellings, related-party indirect holdings). The FilingIQ composite score is documented in full on the team page and algo disclosure. Not investment advice; see disclaimer.