Great Lakes Dredge & Dock Corporation
US ˙ NasdaqGS ˙ US3906071093
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT

SecurityGLDD / Great Lakes Dredge & Dock Corporation
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Mackenzie Financial Corp closes position in GLDD / Great Lakes Dredge & Dock Corporation

On May 13, 2026 - Mackenzie Financial Corp filed a 13F-HR form disclosing ownership of 0 shares of Great Lakes Dredge & Dock Corporation (US:GLDD) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 120,869 shares of Great Lakes Dredge & Dock Corporation. The current value of the position is $0 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 0 -100.00 0
2026-02-18 2025-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 120,869 -18,613 -13.34 1,592 -4.78 0.0019
2025-11-13 2025-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 139,482 105,397 309.22 1,672 302.89 0.0020
2025-08-13 2025-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 34,085 14,360 72.80 415 86.94 0.0005
2025-05-02 2024-12-31 13F/A-2 GREAT LAKES DREDGE & DOCK COM 390607109 19,725 19,725 223 0.0003
2025-02-20 2024-12-31 13F/A-1 GREAT LAKES DREDGE & DOCK COM 390607109 19,725 19,725 223 0.0003
2025-02-14 2024-12-31 13F Great Lakes Dredge & Dock Common Stock 390607109 19,725 19,725 118 0.0002
2024-01-30 2023-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 0 -11,077 -100.00 0 -100.00
2023-10-25 2023-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 11,077 11,077 83 0.0001
2020-11-13 2020-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 0 -20,308 -100.00 0 -100.00
2020-08-13 2020-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 20,308 -20,444 -50.17 188 -44.38 0.0005
2020-05-14 2020-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 40,752 50 0.12 338 -26.68 0.0011
2020-02-13 2019-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 40,702 -58,178 -58.84 461 -55.37 0.0011
2019-11-14 2019-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 98,880 25,550 34.84 1,033 27.53 0.0027
2019-08-23 2019-06-30 13F/A-1 GREAT LAKES DREDGE & DOCK COM 390607109 73,330 48,760 198.45 810 269.86 0.0021
2019-08-14 2019-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 73,330 48,760 810
2019-05-15 2019-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 24,570 24,570 219 0.0005
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.