Great Lakes Dredge & Dock Corporation
US ˙ NasdaqGS ˙ US3906071093
TEN SYMBOL NIE JEST JUŻ AKTYWNY

SecurityGLDD / Great Lakes Dredge & Dock Corporation
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership2,866,123 shares
Ownership 4.30%
Alliancebernstein L.p. ownership in GLDD / Great Lakes Dredge & Dock Corporation

2025-02-05 - Alliancebernstein L.p. has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 2,866,123 shares of Great Lakes Dredge & Dock Corporation (US:GLDD). This represents 4.3 percent ownership of the company.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2025-02-05 2025-02-05 13G/A 2,866,123 4.30
2024-11-15 2024-11-15 13G/A 4,603,700 3,888,955 -15.53 5.80 -15.94
2024-02-14 2024-02-14 13G/A 3,609,597 4,603,700 27.54 6.90 25.45
2023-02-14 2023-02-14 13G 3,609,597 3,609,597 0.00 5.50 0.00

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-05-15 2026-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 61,340 -1,800 -2.85 805 -2.90 0.0003
2026-02-17 2025-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 63,140 -15,670 -19.88 828 -12.29 0.0003
2025-11-14 2025-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 78,810 0 0.00 945 -1.67 0.0003
2025-08-14 2025-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 78,810 -2,606,419 -97.07 961 -95.89 0.0003
2025-05-15 2025-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 2,685,229 -180,894 -6.31 23,361 -27.80 0.0085
2025-02-12 2024-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 2,866,123 -1,022,832 -26.30 32,359 -20.98 0.0110
2024-11-14 2024-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 3,888,955 -89,481 -2.25 40,951 17.23 0.0138
2024-08-14 2024-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 3,978,436 -545,301 -12.05 34,931 -11.75 0.0122
2024-05-14 2024-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 4,523,737 -79,963 -1.74 39,583 11.95 0.0140
2024-02-14 2023-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 4,603,700 -230,697 -4.77 35,356 -8.24 0.0136
2023-11-14 2023-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 4,834,397 -101,113 -2.05 38,530 -4.33 0.0164
2023-08-15 2023-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 4,935,510 849,506 20.79 40,274 81.52 0.0164
2023-05-15 2023-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 4,086,004 476,407 13.20 22,187 3.31 0.0095
2023-02-15 2022-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 3,609,597 563,787 18.51 21,477 -6.97 0.0097
2022-11-15 2022-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 3,045,810 416,574 15.84 23,087 -33.02 0.0112
2022-08-15 2022-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 2,629,236 -26,411 -0.99 34,469 -7.49 0.0157
2022-05-13 2022-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 2,655,647 -42,072 -1.56 37,259 -12.14 0.0144
2022-02-14 2021-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 2,697,719 549,127 25.56 42,408 30.80 0.0150
2021-11-10 2021-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 2,148,592 2,091,292 3,649.72 32,422 3,773.60 0.0128
2021-07-30 2021-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 57,300 0 0.00 837 0.24 0.0003
2021-05-06 2021-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 57,300 -3,400 -5.60 835 4.51 0.0004
2021-02-08 2020-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 60,700 -3,000 -4.71 799 31.85 0.0004
2020-11-12 2020-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 63,700 0 0.00 606 2.71 0.0003
2020-08-13 2020-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 63,700 0 0.00 590 11.53 0.0003
2020-05-14 2020-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 63,700 -2,300 -3.48 529 -29.28 0.0004
2020-02-18 2019-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 66,000 0 0.00 748 8.41 0.0004
2019-11-14 2019-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 66,000 0 0.00 690 -5.35 0.0004
2019-08-14 2019-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 66,000 17,800 36.93 729 69.93 0.0005
2019-05-14 2019-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 48,200 5,800 13.68 429 52.67 0.0003
2019-02-13 2018-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 42,400 1,600 3.92 281 11.07 0.0002
2018-11-08 2018-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 40,800 0 0.00 253 18.22 0.0002
2018-08-13 2018-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 40,800 2,900 7.65 214 22.99 0.0001
2018-05-14 2018-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 37,900 3,400 9.86 174 -6.45 0.0001
2018-02-13 2017-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 34,500 -2,900 -7.75 186 2.76 0.0001
2017-11-13 2017-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 37,400 -4,100 -9.88 181 1.69 0.0001
2017-08-10 2017-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 41,500 27,400 194.33 178 217.86 0.0001
2017-05-11 2017-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 14,100 0 0.00 56 -5.08 0.0000
2017-02-13 2016-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 14,100 -1,000 -6.62 59 11.32 0.0000
2016-11-10 2016-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 15,100 1,500 11.03 53 -10.17 0.0000
2016-08-11 2016-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 13,600 900 7.09 59 3.51 0.0001
2016-05-13 2016-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 12,700 -2,400 -15.89 57 -5.00 0.0000
2016-02-16 2015-12-31 13F/A-1 GREAT LAKES DREDGE & DOCK COM 390607109 15,100 0 0.00 60 -21.05 0.0001
2016-02-12 2015-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 15,100 76
2015-11-13 2015-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 15,100 -2,400 -13.71 76 -26.92 0.0001
2015-08-14 2015-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 17,500 -2,200 -11.17 104 -11.86 0.0001
2015-05-13 2015-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 19,700 -1,300 -6.19 118 -34.44 0.0001
2015-02-13 2014-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 21,000 -7,400 -26.06 180 2.27 0.0001
2014-11-13 2014-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 28,400 -15,500 -35.31 176 -49.86 0.0001
2014-08-13 2014-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 43,900 -18,600 -29.76 351 -38.53 0.0003
2014-05-13 2014-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 62,500 -17,800 -22.17 571 -22.73 0.0005
2014-02-13 2013-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 80,300 29,600 58.38 739 96.54 0.0007
2013-11-14 2013-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 50,700 -46,527 -47.85 376 -50.53 0.0004
2013-08-13 2013-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 97,227 97,227 760 0.0008
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.