// company-profile
Great Lakes Dredge & Dock CORP
GLDDSectorHeavy Construction Other Than Bldg Const - ContractorsInc.DEFilings192Insiders18
// api This Great Lakes Dredge & Dock CORP insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, Great Lakes Dredge & Dock CORP insiders bought $0 (11 transactions) and sold $0 (3 transactions).
- Most active insider: DICKERSON LAWRENCE R with 3 transactions totaling $0.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Great Lakes Dredge & Dock CORP as of 2026-03-31
Total reported AUM
$867.2M
QoQ change
+36.5%
Reporting period
2026-03-31
#1
DIMENSIONAL FUND ADVISORS LP
CIK 354204
$55.2M
3.2M shares
#2
AMERICAN CENTURY COMPANIES INC
CIK 748054
$51.1M
3.0M shares
#3
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
$48.6M
2.9M shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Apr 1, 2026 | Schiffer Vivienne | GLDD | U | 144,817 | — | — |
| Apr 1, 2026 | Armstrong Dana A | GLDD | U | 8,436 | — | — |
| Apr 1, 2026 | HANSON WILLIAM H | GLDD | Award | 13,631 | — | — |
| Apr 1, 2026 | Shipp Earl L | GLDD | U | 42,619 | — | — |
| Apr 1, 2026 | DICKERSON LAWRENCE R | GLDD | Disposition | 76,962 | — | — |
45 more transactions hidden
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