五大湖疏浚船塢公司
US ˙ NasdaqGS ˙ US3906071093
該符號不再有效

SecurityGLDD / Great Lakes Dredge & Dock Corporation
InstitutionInvesco Ltd.
Latest Disclosed Ownership47,937 shares
Latest Disclosed Value $ 814,929
Invesco Ltd. reports 59.89% decrease in ownership of GLDD / Great Lakes Dredge & Dock Corporation

On May 12, 2026 - Invesco Ltd. filed a 13F-HR form disclosing ownership of 47,937 shares of Great Lakes Dredge & Dock Corporation (US:GLDD) valued at $814,929 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 19, 2026 disclosing 119,528 shares of Great Lakes Dredge & Dock Corporation. This represents a change in shares of -59.89% during the quarter. The current value of the position is $814,929 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)
2026-05-12 2026-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 47,937 -71,591 -59.89 815 -48.09 0.0001
2026-02-19 2025-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 119,528 -17,643 -12.86 1,568 -4.62 0.0002
2025-11-13 2025-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 137,171 -6,457 -4.50 1,645 -6.06 0.0003
2025-08-13 2025-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 143,628 -18,216 -11.26 1,751 24.29 0.0003
2025-05-12 2025-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 161,844 -20,747 -11.36 1,408 -31.68 0.0003
2025-02-13 2024-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 182,591 3,867 2.16 2,061 9.57 0.0004
2024-11-12 2024-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 178,724 -48,903 -21.48 1,882 -5.86 0.0004
2024-08-13 2024-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 227,627 -767 -0.34 1,999 0.00 0.0004
2024-05-14 2024-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 228,394 -52,588 -18.72 1,998 -7.37 0.0004
2024-02-13 2023-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 280,982 35,324 14.38 2,158 10.22 0.0005
2023-11-13 2023-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 245,658 1,776 0.73 1,958 -1.66 0.0005
2023-08-11 2023-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 243,882 1,565 0.65 1,990 51.33 0.0005
2023-05-12 2023-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 242,317 116,472 92.55 1,316 75.80 0.0004
2023-02-13 2022-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 125,845 15,850 14.41 749 -10.31 0.0002
2022-11-14 2022-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 109,995 -12,584 -10.27 834 -48.10 0.0003
2022-08-15 2022-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 122,579 30,503 33.13 1,607 24.28 0.0005
2022-05-16 2022-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 92,076 -11,009 -10.68 1,293 -20.23 0.0003
2022-02-14 2021-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 103,085 -13,798 -11.80 1,621 -8.11 0.0004
2021-11-15 2021-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 116,883 -165,017 -58.54 1,764 -57.17 0.0004
2021-08-17 2021-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 281,900 4,492 1.62 4,119 1.85 0.0010
2021-05-17 2021-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 277,408 -23,139 -7.70 4,044 2.15 0.0011
2021-02-16 2020-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 300,547 -78,338 -20.68 3,959 9.88 0.0012
2020-11-16 2020-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 378,885 -388,153 -50.60 3,603 -49.27 0.0012
2020-08-14 2020-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 767,038 144,886 23.29 7,103 37.58 0.0025
2020-05-15 2020-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 622,152 239,594 62.63 5,163 19.13 0.0022
2020-02-14 2019-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 382,558 -370,068 -49.17 4,334 -44.90 0.0013
2019-11-14 2019-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 752,626 216,312 40.33 7,865 32.83 0.0021
2019-08-14 2019-06-30 13F/A-1 GREAT LAKES DREDGE & DOCK COM 390607109 536,314 -69,128 -11.42 5,921 9.77 0.0015
2019-08-14 2019-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 536,314 -286,722 5,921
2019-05-15 2019-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 605,442 52,681 9.53 5,394 47.42 0.0018
2019-02-14 2018-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 552,761 364,702 193.93 3,659 213.81 0.0014
2018-11-14 2018-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 188,059 2,234 1.20 1,166 19.47 0.0004
2018-08-14 2018-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 185,825 3,780 2.08 976 16.61 0.0003
2018-05-15 2018-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 182,045 -10,491 -5.45 837 -19.52 0.0003
2018-02-14 2017-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 192,536 659 0.34 1,040 11.71 0.0004
2017-11-14 2017-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 191,877 19,195 11.12 931 25.30 0.0003
2017-08-14 2017-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 172,682 3,485 2.06 743 9.75 0.0002
2017-05-15 2017-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 169,197 8,469 5.27 677 0.30 0.0002
2017-02-14 2016-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 160,728 12,062 8.11 675 29.81 0.0002
2016-11-14 2016-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 148,666 32,811 28.32 520 2.97 0.0002
2016-08-15 2016-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 115,855 -2,403 -2.03 505 -4.17 0.0002
2016-05-16 2016-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 118,258 17,026 16.82 527 31.42 0.0002
2016-02-16 2015-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 101,232 3,731 3.83 401 -18.33 0.0002
2015-11-16 2015-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 97,501 6,091 6.66 491 -9.91 0.0002
2015-08-14 2015-06-30 13F GREAT LAKES DREDGE & DOCK COMMON 390607109 91,410 -2,110 -2.26 545 -3.02 0.0002
2015-05-15 2015-03-31 13F GREAT LAKES DREDGE & DOCK COMMON 390607109 93,520 11,250 13.67 562 -20.17 0.0002
2015-02-13 2014-12-31 13F GREAT LAKES DREDGE & DOCK COMMON 390607109 82,270 5,180 6.72 704 47.90 0.0003
2014-11-14 2014-09-30 13F GREAT LAKES DREDGE & DOCK COMMON 390607109 77,090 2,746 3.69 476 -19.87 0.0002
2014-08-14 2014-06-30 13F GREAT LAKES DREDGE & DOCK COMMON 390607109 74,344 285 0.38 594 -12.13 0.0002
2014-05-15 2014-03-31 13F GREAT LAKES DREDGE & DOCK COMMON 390607109 74,059 32,427 77.89 676 76.50 0.0003
2014-02-13 2013-12-31 13F GREAT LAKES DREDGE & DOCK COMMON 390607109 41,632 4,837 13.15 383 40.29 0.0002
2013-11-13 2013-09-30 13F GREAT LAKES DREDGE & DOCK COMMON 390607109 36,795 3,743 11.32 273 5.81 0.0001
2013-08-14 2013-06-30 13F GREAT LAKES DREDGE & DOCK COMMON 390607109 33,052 33,052 258 0.0001
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.