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GLDD

Great Lakes Dredge & Dock CORP
$17.00 +0.00 (+0.00%) At close · Apr 1
Market Cap
$1.14B
Shares
66,780,798

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 182
Total Value: $1,004,824,134
Total Shares: 59,107,302
Showing 1–100 of 189 holdings by value · page 1 of 2

Institutional Ownership Trend

25 quarters

Superinvestors Holding GLDD

All superinvestors →
Joel Greenblatt $588,166 Mario Gabelli $340,000

Holder Concentration

Across 182 13F filers · Δ vs Dec 31, 2025
Top Holder
10.7%
Jun 2023 → Mar 2026 · range 10.7% – 13.3%
−1.5 pts
Top 5
32.9%
Jun 2023 → Mar 2026 · range 32.9% – 43.8%
−7.3 pts
Top 10
50.2%
Jun 2023 → Mar 2026 · range 50.2% – 63.8%
−6.4 pts
HHI
362
Jun 2023 → Mar 2026 · range 362 – 526
Broadly held−73

Quarterly Activity

vs Dec 31, 2025
New
55
Increased
42
Decreased
65
Sold Out
98
Unchanged
20
Holder count: -43
Institutional value: +35.6%
Shares held: +4.6%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega TWO SIGMA INVESTMENTS, LP +1,418,839 1,989,521
Large Qube Research & Technologies Ltd +753,487 1,383,585
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP +610,958 730,610
Large Schonfeld Strategic Advisors LLC +446,612 483,667
Mega AMERICAN CENTURY COMPANIES INC +421,815 3,006,419

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega JENNISON ASSOCIATES LLC −2,777,240 1,029,264
Mid Harvey Partners, LLC −2,483,215 1,220,000
Mega BlackRock, Inc. −979,626 5,917,589
Mega DIMENSIONAL FUND ADVISORS LP −913,740 3,386,372
Mega MORGAN STANLEY −690,455 329,163

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 6,212,481 $105,612,177
Mid GLAZER CAPITAL, LLC 2,949,613 $50,143,421
Mega FIL Ltd 2,671,231 $45,410,927
Large Balyasny Asset Management L.P. 1,626,990 $27,658,830
Small WATER ISLAND CAPITAL LLC 1,263,580 $21,480,860

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 3,987,334 $52,313,819
Large TCW GROUP INC 1,874,234 $24,589,950
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC 508,266 $6,668,449
Large Connor, Clark & Lunn Investment Management Ltd. 453,539 $5,950,431
Large Allspring Global Investments Holdings, LLC 430,762 $5,651,596
Filter: New 55 Increased 42 Reduced 65 Sold out 98 Unchanged 20
Showing 100 of 189
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $100,599,013 10.01% 5,917,589
Mega DIMENSIONAL FUND ADVISORS LP $57,568,324 5.73% 3,386,372
Mega VANGUARD CAPITAL MANAGEMENT LLC $57,057,491 5.68% 3,356,323
Mega AMERICAN CENTURY COMPANIES INC $51,109,123 5.09% 3,006,419
Mid GLAZER CAPITAL, LLC $50,143,421 4.99% 2,949,613
Mega VANGUARD CAPITAL MANAGEMENT LLC $48,554,686 4.83% 2,856,158
Mega FIL Ltd $45,410,927 4.52% 2,671,231
Mega TWO SIGMA INVESTMENTS, LP $33,821,857 3.37% 1,989,521
Mega GEODE CAPITAL MANAGEMENT, LLC $28,528,822 2.84% 1,678,166
Large Balyasny Asset Management L.P. $27,658,830 2.75% 1,626,990
Mega STATE STREET CORP $26,821,274 2.67% 1,577,722
Large Qube Research & Technologies Ltd $23,520,945 2.34% 1,383,585
Small WATER ISLAND CAPITAL LLC $21,480,860 2.14% 1,263,580
Mid ODDO BHF ASSET MANAGEMENT SAS $19,828,596 1.97% 1,166,388
Mega MILLENNIUM MANAGEMENT LLC $19,229,159 1.91% 1,131,127
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $17,924,120 1.78% 1,054,360
Small Minerva Advisors LLC $17,504,951 1.74% 1,029,703
Mega JENNISON ASSOCIATES LLC $17,497,488 1.74% 1,029,264
Small Beryl Capital Management LLC $15,513,129 1.54% 912,537
Small Sand Grove Capital Management LLP $15,184,230 1.51% 893,190
Large OMERS ADMINISTRATION Corp $14,688,000 1.46% 864,000
Mega GOLDMAN SACHS GROUP INC $14,596,557 1.45% 858,621
Mid AQR Arbitrage LLC $12,420,455 1.24% 730,615
Mega NORTHERN TRUST CORP Bank $11,381,126 1.13% 669,478
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $11,124,800 1.11% 654,400
Mid TIG Advisors, LLC $10,928,739 1.09% 642,867
Mid Harvey Partners, LLC $10,370,000 1.03% 610,000
Mid Harvey Partners, LLC $10,370,000 1.03% 610,000
Large LONDON CO OF VIRGINIA $9,935,208 0.99% 584,424
Large Squarepoint Ops LLC $9,933,355 0.99% 584,315
Small Prescott Group Capital Management, L.L.C. $9,806,790 0.98% 576,870
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $9,486,204 0.94% 558,012
Large GABELLI FUNDS LLC $8,594,231 0.86% 505,543
Mid Cinctive Capital Management LP $8,500,000 0.85% 500,000
Mega VANGUARD FIDUCIARY TRUST CO Bank $7,386,806 0.74% 434,518
Mid First Trust Capital Management L.P. $7,379,037 0.73% 434,061
Large Schonfeld Strategic Advisors LLC $7,372,339 0.73% 433,667
Large RENAISSANCE TECHNOLOGIES LLC $6,488,900 0.65% 381,700
Mega MORGAN STANLEY $5,595,771 0.56% 329,163
Mid Sanctuary Advisors, LLC $5,189,080 0.52% 305,240
Large HRT FINANCIAL LP $4,699,191 0.47% 276,423
Large LAZARD ASSET MANAGEMENT LLC $4,579,613 0.46% 269,389
Mega FRANKLIN RESOURCES INC $4,540,972 0.45% 267,116
Mid PRELUDE CAPITAL MANAGEMENT, LLC $4,349,484 0.43% 255,852
Mega Bank of New York Mellon Corp Bank $4,317,218 0.43% 253,954
Small GABELLI & Co INVESTMENT ADVISERS, INC. $4,312,815 0.43% 253,695
Mega JPMORGAN CHASE & CO $3,831,120 0.38% 225,360
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $3,539,128 0.35% 208,184
Mid Polar Asset Management Partners Inc. $3,400,000 0.34% 200,000
Large PRUDENTIAL FINANCIAL INC $3,230,510 0.32% 190,030
Mid WOLVERINE ASSET MANAGEMENT LLC $2,987,036 0.30% 175,708
Mega BANK OF AMERICA CORP /DE/ Bank $2,957,762 0.29% 173,986
Mega Nuveen, LLC $2,553,315 0.25% 150,195
Mid Y-Intercept (Hong Kong) Ltd $2,417,893 0.24% 142,229
Mega AQR CAPITAL MANAGEMENT LLC $2,285,344 0.23% 134,432
Mega Swiss National Bank Bank $2,281,400 0.23% 134,200
Mega UBS Group AG $2,202,877 0.22% 129,581
Mid Groupe la Francaise $2,186,166 0.22% 128,598
Small OXFORD ASSET MANAGEMENT LLP $2,072,011 0.21% 121,883
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $1,912,993 0.19% 112,529
Large Russell Investments Group, Ltd. $1,730,957 0.17% 101,821
Micro Versor Investments LP $1,727,727 0.17% 101,631
Large CREDIT AGRICOLE S A $1,700,000 0.17% 100,000
Mega D. E. Shaw & Co., Inc. $1,570,001 0.16% 92,353
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $1,548,530 0.15% 91,090
Mega RHUMBLINE ADVISERS $1,493,535 0.15% 87,855
Mid HB Wealth Management, LLC $1,491,784 0.15% 87,752
Mega PRINCIPAL FINANCIAL GROUP INC $1,435,463 0.14% 84,439
Mega VICTORY CAPITAL MANAGEMENT INC $1,309,000 0.13% 77,000
Mid BOOTHBAY FUND MANAGEMENT, LLC $1,272,620 0.13% 74,860
Mid Susquehanna Portfolio Strategies, LLC $1,199,962 0.12% 70,586
Small CREDIT INDUSTRIEL ET COMMERCIAL $1,177,165 0.12% 69,245
Mega DEUTSCHE BANK AG\ Bank $1,073,346 0.11% 63,138
Mega Legal & General Group Plc $1,058,641 0.11% 62,273
Mega ALLIANCEBERNSTEIN L.P. $1,042,780 0.10% 61,340
Large Creative Planning $914,328 0.09% 53,784
Large MARSHALL WACE, LLP $885,445 0.09% 52,085
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $870,400 0.09% 51,200
Mega PRICE T ROWE ASSOCIATES INC /MD/ $850,000 0.08% 50,000
Large Schonfeld Strategic Advisors LLC $850,000 0.08% 50,000
Large STATE OF WISCONSIN INVESTMENT BOARD $849,320 0.08% 49,960
Mega VANGUARD ASSET MANAGEMENT, Ltd $823,990 0.08% 48,470
Mega Invesco Ltd. $814,929 0.08% 47,937
Small CSS LLC/IL $797,300 0.08% 46,900
Large Zurcher Kantonalbank (Zurich Cantonalbank) Bank $783,683 0.08% 46,099
Small VARCOV Co. $742,577 0.07% 43,681
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $712,300 0.07% 41,900
Mega CITADEL ADVISORS LLC $637,772 0.06% 37,516
Mid INTECH INVESTMENT MANAGEMENT LLC $633,709 0.06% 37,277
Mega WELLS FARGO & COMPANY/MN $599,794 0.06% 35,282
Small Canton Hathaway, LLC $595,000 0.06% 35,000
Large Gotham Asset Management, LLC $588,166 0.06% 34,598
Large MetLife Investment Management, LLC $585,956 0.06% 34,468
Small State of Wyoming $584,545 0.06% 34,385
Mega BARCLAYS PLC $549,406 0.05% 32,318
Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC $545,190 0.05% 32,070
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $530,366 0.05% 31,198
Large ProShare Advisors LLC $529,533 0.05% 31,149
Large Point72 Asset Management, L.P. $519,469 0.05% 30,557
Large ALPS ADVISORS INC $497,607 0.05% 29,271
Key facts CIK 1372020 CUSIP 390607109 13F (30d) 1 filings 1 filers Visit website Investor relations

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