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

SecurityGLDD / Great Lakes Dredge & Dock Corporation
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership1,678,166 shares
Latest Disclosed Value $ 28,534,039
Geode Capital Management, Llc reports 2.93% increase in ownership of GLDD / Great Lakes Dredge & Dock Corporation

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 1,678,166 shares of Great Lakes Dredge & Dock Corporation (US:GLDD) valued at $28,528,822 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 1,630,411 shares of Great Lakes Dredge & Dock Corporation. This represents a change in shares of 2.93% during the quarter. The current value of the position is $28,528,822 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)
2026-05-15 2026-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,678,166 47,755 2.93 28,534 33.37 0.0009
2026-02-09 2025-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,630,411 -4,080 -0.25 21,395 9.16 0.0013
2025-11-12 2025-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,634,491 -22,056 -1.33 19,600 -2.95 0.0013
2025-08-08 2025-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,656,547 51,269 3.19 20,195 44.57 0.0014
2025-05-13 2025-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,605,278 45,456 2.91 13,970 -20.70 0.0011
2025-02-12 2024-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,559,822 -2,075 -0.13 17,615 7.08 0.0014
2024-11-12 2024-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,561,897 22,166 1.44 16,450 21.66 0.0013
2024-08-09 2024-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,539,731 65,366 4.43 13,522 4.80 0.0012
2024-05-13 2024-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,474,365 28,652 1.98 12,903 16.19 0.0012
2024-02-13 2023-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,445,713 75,869 5.54 11,104 1.69 0.0012
2023-11-13 2023-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,369,844 43,512 3.28 10,919 0.90 0.0013
2023-08-11 2023-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,326,332 24,359 1.87 10,823 53.09 0.0013
2023-05-15 2023-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,301,973 80,864 6.62 7,070 100,885.71 0.0009
2023-02-13 2022-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,221,109 20,143 1.68 7 -99.92 0.0010
2022-11-14 2022-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,200,966 15,903 1.34 9,103 -41.41 0.0014
2022-08-12 2022-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,185,063 8,313 0.71 15,536 -5.89 0.0023
2022-05-13 2022-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,176,750 1,551 0.13 16,509 -10.64 0.0021
2022-02-11 2021-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,175,199 -31,833 -2.64 18,474 1.43 0.0022
2021-11-12 2021-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,207,032 -29,429 -2.38 18,214 0.83 0.0025
2021-08-13 2021-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,236,461 45,492 3.82 18,064 4.03 0.0025
2021-05-12 2021-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,190,969 102,549 9.42 17,364 21.14 0.0027
2021-02-12 2020-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,088,420 6,763 0.63 14,334 39.35 0.0024
2020-11-13 2020-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,081,657 18,817 1.77 10,286 4.52 0.0020
2020-08-13 2020-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,062,840 -41,961 -3.80 9,841 7.33 0.0021
2020-05-14 2020-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,104,801 72,098 6.98 9,169 -21.63 0.0024
2020-02-20 2019-12-31 13F/A-1 GREAT LAKES DREDGE & DOCK COM 390607109 1,032,703 41,567 4.19 11,700 12.97 0.0024
2020-02-13 2019-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,032,703 41,567 11,700 1,491.0624
2019-11-12 2019-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 991,136 -69,807 -6.58 10,357 -11.57 0.0024
2019-08-14 2019-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 1,060,943 147,912 16.20 11,712 43.99 0.0028
2019-05-14 2019-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 913,031 144,341 18.78 8,134 59.90 0.0021
2019-03-06 2018-12-31 13F/A-1 GREAT LAKES DREDGE & DOCK COM 390607109 768,690 218,409 39.69 5,087 49.14 0.0016
2019-02-13 2018-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 768,690 218,409 5,087
2018-11-13 2018-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 550,281 28,918 5.55 3,411 24.63 0.0010
2018-08-14 2018-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 521,363 50,112 10.63 2,737 26.30 0.0008
2018-05-15 2018-03-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 471,251 10,410 2.26 2,167 -12.90 0.0007
2018-02-13 2017-12-31 13F GREAT LAKES DREDGE & DOCK COM 390607109 460,841 -5,420 -1.16 2,488 10.04 0.0008
2017-11-14 2017-09-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 466,261 13,888 3.07 2,261 16.25 0.0008
2017-08-14 2017-06-30 13F GREAT LAKES DREDGE & DOCK COM 390607109 452,373 2,144 0.48 1,945 8.06 0.0008
2017-06-21 2017-03-31 13F/A-1 GREAT LAKES DREDGE&DOCK COM 390607109 450,229 21,195 4.94 1,800 -0.06 0.0007
2017-05-12 2017-03-31 13F GREAT LAKES DREDGE&DOCK COM 390607109 450,229 1,800
2017-02-14 2016-12-31 13F GREAT LAKES DREDGE&DOCK COM 390607109 429,034 29,401 7.36 1,801 28.83 0.0008
2016-11-10 2016-09-30 13F GREAT LAKES DREDGE&DOCK COM 390607109 399,633 5,858 1.49 1,398 -18.53 0.0007
2016-08-12 2016-06-30 13F GREAT LAKES DREDGE&DOCK COM 390607109 393,775 7,238 1.87 1,716 -0.41 0.0009
2016-05-13 2016-03-31 13F GREAT LAKES DREDGE&DOCK COM 390607109 386,537 4,135 1.08 1,723 13.80 0.0009
2016-02-12 2015-12-31 13F GREAT LAKES DREDGE&DOCK COM 390607109 382,402 16,491 4.51 1,514 -17.90 0.0009
2015-11-13 2015-09-30 13F GREAT LAKES DREDGE&DOCK COM 390607109 365,911 -2,312 -0.63 1,844 -15.91 0.0011
2015-08-14 2015-06-30 13F GREAT LAKES DREDGE&DOCK COM 390607109 368,223 30,114 8.91 2,193 7.92 0.0013
2015-05-14 2015-03-31 13F GREAT LAKES DREDGE&DOCK COM 390607109 338,109 11,081 3.39 2,032 -27.40 0.0012
2015-02-12 2014-12-31 13F GREAT LAKES DREDGE&DOCK COM 390607109 327,028 7,483 2.34 2,799 41.79 0.0017
2014-11-14 2014-09-30 13F GREAT LAKES DREDGE&DOCK COM 390607109 319,545 2,835 0.90 1,974 -21.98 0.0013
2014-08-13 2014-06-30 13F GREAT LAKES DREDGE&DOCK COM 390607109 316,710 21,337 7.22 2,530 -6.16 0.0016
2014-05-14 2014-03-31 13F GREAT LAKES DREDGE&DOCK COM 390607109 295,373 26,717 9.94 2,696 9.11 0.0018
2014-02-14 2013-12-31 13F GREAT LAKES DREDGE&DOCK COM 390607109 268,656 1,687 0.63 2,471 24.73 0.0017
2013-11-14 2013-09-30 13F GREAT LAKES DREDGE&DOCK COM 390607109 266,969 8,170 3.16 1,981 -2.12 0.0016
2013-08-14 2013-06-30 13F GREAT LAKES DREDGE&DOCK COM 390607109 258,799 258,799 2,024 0.0018
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.