Vault-13

GREAT LAKES DREDGE & DOCK CO GLDD

COM · Common Stock · CUSIP 390607109

193 institutional holders +0 vs Q1 2025
54,616,49054.6m shares reported held*
$665.7mreported value*
29 new 76 added 57 reduced 29 sold out net sold ≈ $9.2m (-749.2k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($2.9m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $12.19. Options: 7 managers hold calls ($15.1m notional), 4 hold puts ($205.1k).

Trends to Q2 2025

Institutional holders

Managers reporting a position, each quarter

0100200Q3 22: 137Q4 22: 143Q1 23: 141Q2 23: 134Q3 23: 147Q4 23: 143Q1 24: 159Q2 24: 171Q3 24: 181Q4 24: 192Q1 25: 193Q2 25: 193193Q3 22Q2 23Q1 24Q4 24Q2 25
Numbers
QuarterHolders
Q3 2022137
Q4 2022143
Q1 2023141
Q2 2023134
Q3 2023147
Q4 2023143
Q1 2024159
Q2 2024171
Q3 2024181
Q4 2024192
Q1 2025193
Q2 2025193

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
2000200Q3 23: 75 bought or addedQ3 23: 52 cut or sold outQ4 23: 73 bought or addedQ4 23: 55 cut or sold outQ4 23Q1 24: 63 bought or addedQ1 24: 77 cut or sold outQ2 24: 81 bought or addedQ2 24: 81 cut or sold outQ2 24Q3 24: 92 bought or addedQ3 24: 79 cut or sold outQ4 24: 90 bought or addedQ4 24: 82 cut or sold outQ4 24Q1 25: 82 bought or addedQ1 25: 103 cut or sold outQ2 25: 105 bought or addedQ2 25: 86 cut or sold outQ2 25
Numbers
QuarterBought or addedCut or sold out
Q3 20237552
Q4 20237355
Q1 20246377
Q2 20248181
Q3 20249279
Q4 20249082
Q1 202582103
Q2 202510586

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$5m$10m$15m$20mQ3 24 calls: $2.5mQ3 24 puts: $230.1kQ3 24P/C 0.09Q4 24 calls: $5.5mQ4 24 puts: $100.4kQ4 24P/C 0.02Q1 25 calls: $57.4kQ1 25 puts: $994.1kQ1 25P/C 17.31Q2 25 calls: $15.1mQ2 25 puts: $205.1kQ2 25P/C 0.01
Numbers
QuarterCallsPutsP/C
Q3 2024$2.5m$230.1k0.09
Q4 2024$5.5m$100.4k0.02
Q1 2025$57.4k$994.1k17.31
Q2 2025$15.1m$205.1k0.01

Biggest buyers

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Added +733,312+733.3k
Cubist Systematic Strategies, LLC Added +394,543+394.5k
RENAISSANCE TECHNOLOGIES LLC Added +267,988+268.0k
Allspring Global Investments Holdings, LLC New +248,026+248.0k
TWO SIGMA INVESTMENTS, LP Added +237,834+237.8k
SEGALL BRYANT & HAMILL, LLC New +223,340+223.3k
AMERICAN CENTURY COMPANIES INC Added +210,134+210.1k
Connor, Clark & Lunn Investment Management Ltd. Added +189,799+189.8k
Jump Financial, LLC Added +166,853+166.9k
JPMORGAN CHASE & CO Added +166,166+166.2k

Biggest sellers

ALLIANCEBERNSTEIN L.P. Reduced -2,606,419-2.6m
CenterBook Partners LP Reduced -770,792-770.8k
JENNISON ASSOCIATES LLC Reduced -517,056-517.1k
PRIVATE MANAGEMENT GROUP INC Reduced -488,992-489.0k
BlackRock, Inc. Reduced -378,765-378.8k
GOLDMAN SACHS GROUP INC Reduced -149,885-149.9k
HB Wealth Management, LLC Sold out -133,585-133.6k
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced -128,239-128.2k
Seven Six Capital Management, LLC Reduced -117,886-117.9k
Sequoia Financial Advisors, LLC Sold out -102,742-102.7k

Biggest calls

PEAK6 LLC New $9.0m737.4k shares
CITADEL ADVISORS LLC Added $1.8m151.0k shares
GROUP ONE TRADING LLC Added $1.3m106.0k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP New $1.1m89.7k shares
JANE STREET GROUP, LLC New $942.3k77.3k shares
SIMPLEX TRADING, LLC New $932.0k76.5k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC Added $167.0k13.7k shares
GROUP ONE TRADING LLC Added $34.1k2.8k shares
SIMPLEX TRADING, LLC Reduced $4.0k400 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
BlackRock, Inc. 13G · institution -1.8 pts · filed 2026-04-28 8.2% -1.8 pts 5.5m 2026-04-28
VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 5.0% new 3.4m 2026-04-30

Fell to 5% or below in the last year: DIMENSIONAL FUND ADVISORS LP (0.0%, 2026-07-14), Harvey Partners, LLC (0.9%, 2026-05-15), PRUDENTIAL FINANCIAL INC (1.8%, 2026-05-08), JENNISON ASSOCIATES LLC (1.5%, 2026-05-06), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD CAPITAL MANAGEMENT LLC)

Holders, Q2 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 BlackRock, Inc. 0.00% of their portfolio New York, NY 6,785,1226.8m $82.7m $82.7m 0.00% Reduced -378.8k -378,765
2 JENNISON ASSOCIATES LLC 0.03% of their portfolio NEW YORK, NY 4,793,8384.8m $58.4m $58.4m 0.03% Reduced -517.1k -517,056
3 DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio AUSTIN, TX 4,288,2074.3m $52.3m $52.3m 0.01% Reduced -49.2k -49,239
4 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 3,885,0903.9m $47.4m $47.4m 0.00% Reduced -22.1k -22,084
5 Harvey Partners, LLC 4.54% of their portfolio Tarrytown, NY 3,733,0003.7m $45.5m $45.5m 4.54% Unchanged
6 AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio KANSAS CITY, MO 2,180,9092.2m $26.6m $26.6m 0.01% Added +210.1k +210,134
7 TCW GROUP INC 0.20% of their portfolio LOS ANGELES, CA 2,085,7342.1m $25.4m $25.4m 0.20% Reduced -67.8k -67,800
8 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 1,656,5471.7m $20.2m $20.2m 0.00% Added +51.3k +51,269
9 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 1,626,7381.6m $19.8m $19.8m 0.00% Added +56.3k +56,336
10 Minerva Advisors LLC 11.09% of their portfolio BALA CYNWYD, PA 1,389,8071.4m $16.9m $16.9m 11.09% Unchanged
11 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio BOSTON, MA 841,140841.1k $10.3m $10.3m 0.01% Added +733.3k +733,312
12 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 793,082793.1k $9.7m $9.7m 0.00% Added +92.5k +92,518
13 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 789,276789.3k $9.6m $9.6m 0.00% Added +166.2k +166,166
14 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 691,041691.0k $8.4m $8.4m 0.00% Added +59.0k +59,040
15 PRIVATE MANAGEMENT GROUP INC 0.26% of their portfolio IRVINE, CA 653,550653.5k $8.0m $8.0m 0.26% Reduced -489.0k -488,992
16 NEXT CENTURY GROWTH INVESTORS LLC 0.61% of their portfolio PLYMOUTH, MN 648,290648.3k $7.9m $7.9m 0.61% Reduced -17.0k -16,992
17 LONDON CO OF VIRGINIA 0.04% of their portfolio RICHMOND, VA 642,744642.7k $7.8m $7.8m 0.04% Unchanged
18 Nuveen, LLC 0.00% of their portfolio CHARLOTTE, NC 617,145617.1k $7.5m $7.5m 0.00% Added +162.0k +161,997
19 Prescott Group Capital Management, L.L.C. 0.83% of their portfolio Tulsa, OK 576,870576.9k $7.0m $7.0m 0.83% Unchanged
20 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 556,440556.4k $6.8m $6.8m 0.00% Added +19.7k +19,722
21 Cubist Systematic Strategies, LLC 0.06% of their portfolio STAMFORD, CT 492,191492.2k $6.0m $6.0m 0.06% Added +394.5k +394,543
22 CASTLEKEEP INVESTMENT ADVISORS LLC 2.85% of their portfolio WESTPORT, CT 477,163477.2k $5.8m $5.8m 2.85% Reduced -19.2k -19,249
23 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 469,259469.3k $5.7m $5.7m 0.00% Added +46.4k +46,430
24 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 468,678468.7k $5.7m $5.7m 0.00% Reduced -47.9k -47,931
25 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 438,229438.2k $5.3m $5.3m 0.01% Reduced -63.5k -63,527
26 Acuitas Investments, LLC 4.11% of their portfolio Seattle, WA 423,234423.2k $5.2m $5.2m 4.11% Unchanged
27 TUDOR INVESTMENT CORP ET AL 0.04% of their portfolio STAMFORD, CT 387,936387.9k $4.7m $4.7m 0.04% Added +154.3k +154,251
28 RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio NEW YORK, NY 384,388384.4k $4.7m $4.7m 0.01% Added +268.0k +267,988
29 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 354,091354.1k $4.3m $4.3m 0.00% Reduced -149.9k -149,885
30 CenterBook Partners LP 0.24% of their portfolio GREENWICH, CT 351,182351.2k $4.3m $4.3m 0.24% Reduced -770.8k -770,792
31 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 348,820348.8k $4.3m $4.3m 0.01% Added +237.8k +237,834
32 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 348,724348.7k $4.3m $4.3m 0.00% Added +82.2k +82,165
33 Connor, Clark & Lunn Investment Management Ltd. 0.01% of their portfolio VANCOUVER, A1 342,301342.3k $4.2m $4.2m 0.01% Added +189.8k +189,799
34 ESSEX INVESTMENT MANAGEMENT CO LLC 0.66% of their portfolio BOSTON, MA 298,682298.7k $3.6m $3.6m 0.66% Reduced -2.1k -2,139
35 Brandywine Global Investment Management, LLC 0.03% of their portfolio PHILADELPHIA, PA 292,220292.2k $3.6m $3.6m 0.03% Added +47.4k +47,390
36 BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.01% of their portfolio Paris, I0 280,810280.8k $3.4m $3.4m 0.01% Reduced -8.6k -8,640
37 Seven Six Capital Management, LLC 3.05% of their portfolio NEW YORK, NY 275,413275.4k $3.4m $3.4m 3.05% Reduced -117.9k -117,886
38 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 274,465274.5k $3.3m $3.3m 0.00% Added +27.7k +27,699
39 Trexquant Investment LP 0.04% of their portfolio STAMFORD, CT 261,531261.5k $3.2m $3.2m 0.04% Added +165.5k +165,469
40 WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio Boston, MA 256,081256.1k $3.1m $3.1m 0.00% Reduced -17.4k -17,396
41 Allspring Global Investments Holdings, LLC 0.00% of their portfolio CHARLOTTE, NC 248,026248.0k $2.9m $2.9m 0.00% New
42 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 247,508247.5k $3.0m $3.0m 0.00% Added +10.8k +10,831
43 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 245,097245.1k $3.0m $3.0m 0.00% Added +103.7k +103,724
44 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.07% of their portfolio HOUSTON, TX 242,820242.8k $3.0m $3.0m 0.07% Added +19.5k +19,467
45 TWO SIGMA ADVISERS, LP 0.01% of their portfolio NEW YORK, NY 234,467234.5k $2.9m $2.9m 0.01% Added +91.0k +91,000
46 Sanctuary Advisors, LLC 0.02% of their portfolio INDIANAPOLIS, IN 234,209234.2k $2.9m $2.9m 0.02% Reduced -59 -59
47 SEGALL BRYANT & HAMILL, LLC 0.04% of their portfolio CHICAGO, IL 223,340223.3k $2.7m $2.7m 0.04% New
48 GSA CAPITAL PARTNERS LLP 0.19% of their portfolio LONDON, X0 220,881220.9k $2.7m $2.7m 0.19% Added +161.5k +161,501
49 FIRST TRUST ADVISORS LP 0.00% of their portfolio Wheaton, IL 219,506219.5k $2.7m $2.7m 0.00% Added +10.6k +10,592
50 ALGERT GLOBAL LLC 0.06% of their portfolio SAN FRANCISCO, CA 218,817218.8k $2.7m $2.7m 0.06% Added +47.5k +47,478
51 Empowered Funds, LLC 0.03% of their portfolio NEWTOWN SQUARE, PA 217,820217.8k $2.7m $2.7m 0.03% Added +19.5k +19,467
52 Squarepoint Ops LLC 0.01% of their portfolio NEW YORK, NY 210,029210.0k $2.6m $2.6m 0.01% Added +109.6k +109,625
53 WITTENBERG INVESTMENT MANAGEMENT, INC. 1.05% of their portfolio CARLISLE, MA 196,800196.8k $2.4m $2.4m 1.05% Reduced -31.5k -31,500
54 Jump Financial, LLC 0.03% of their portfolio Chicago, IL 192,653192.7k $2.3m $2.3m 0.03% Added +166.9k +166,853
55 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 187,094187.1k $2.3m $2.3m 0.00% Added +24.6k +24,634
56 BFSG, LLC 0.25% of their portfolio IRVINE, CA 179,977180.0k $2.2m $2.2m 0.25% Reduced -2.1k -2,133
57 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 169,286169.3k $2.1m $2.1m 0.00% Added +95.1k +95,064
58 JACOBS LEVY EQUITY MANAGEMENT, INC 0.01% of their portfolio FLORHAM PARK, NJ 165,316165.3k $2.0m $2.0m 0.01% Added +130.4k +130,389
59 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 163,794163.8k $2.0m $2.0m 0.00% Added +74.1k +74,063
60 UBS Group AG 0.00% of their portfolio ZURICH, V8 161,716161.7k $2.0m $2.0m 0.00% Added +2.2k +2,246
61 Thrivent Financial for Lutherans 0.00% of their portfolio Minneapolis, MN 155,555155.6k $1.9m $1.9m 0.00% Added +550 +550
62 Jackson Creek Investment Advisors LLC 0.49% of their portfolio CASTLE ROCK, CO 147,568147.6k $1.8m $1.8m 0.49% New
63 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 143,628143.6k $1.8m $1.8m 0.00% Reduced -18.2k -18,216
64 Swiss National Bank 0.00% of their portfolio ZURICH, V8 126,700126.7k $1.5m $1.5m 0.00% Reduced -4.3k -4,300
65 HRT FINANCIAL LP 0.01% of their portfolio NEW YORK, NY 113,515113.5k $1.4m $1.4m 0.01% New
66 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 106,983107.0k $1.3m $1.3m 0.00% Added +4.7k +4,673
67 Susquehanna Portfolio Strategies, LLC 0.03% of their portfolio Bala Cynwyd, PA 105,508105.5k $1.3m $1.3m 0.03% New
68 VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio San Antonio, TX 101,000101.0k $1.2m $1.2m 0.00% Reduced -15.0k -15,000
69 Balyasny Asset Management L.P. 0.00% of their portfolio Chicago, IL 99,90299.9k $1.2m $1.2m 0.00% Added +52.1k +52,130
70 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 98,99699.0k $1.2m $1.2m 0.00% Reduced -128.2k -128,239
71 Cullen Capital Management, LLC 0.01% of their portfolio New York, NY 97,12897.1k $1.2m $1.2m 0.01% Reduced -21.3k -21,324
72 Legato Capital Management LLC 0.13% of their portfolio San Francisco, CA 88,22388.2k $1.1m $1.1m 0.13% Reduced -215 -215
73 PANAGORA ASSET MANAGEMENT INC 0.00% of their portfolio BOSTON, MA 86,49786.5k $1.1m $1.1m 0.00% Added +37.0k +37,002
74 NORGES BANK 0.00% of their portfolio OSLO, Q8 83,80083.8k $1.0m $1.0m 0.00% Unchanged
75 Legal & General Group Plc 0.00% of their portfolio London, X0 80,03980.0k $975.7k $975.7k 0.00% Added +5.1k +5,117
76 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 79,34479.3k $967.2k $967.2k 0.00% Reduced -14.0k -14,014
77 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 78,81078.8k $960.7k $960.7k 0.00% Reduced -2.6m -2,606,419
78 AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio Greenwich, CT 73,57873.6k $896.9k $896.9k 0.00% Reduced -37.3k -37,281
79 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 72,77572.8k $901.0k $901.0k 0.00% Added +31.5k +31,519
80 Inspire Investing, LLC 0.10% of their portfolio MERIDIAN, ID 72,59472.6k $884.9k $884.9k 0.10% New
81 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 70,62470.6k $862.0k $862.0k 0.00% Added +35.6k +35,589
82 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 70,26670.3k $856.5k $856.5k 0.00% Added +7.5k +7,538
83 Quantbot Technologies LP 0.02% of their portfolio NEW YORK, NY 69,63969.6k $848.9k $848.9k 0.02% Added +39.0k +38,963
84 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 69,46069.5k $846.7k $846.7k 0.00% Added +4.4k +4,420
85 SG Americas Securities, LLC 0.00% of their portfolio NEW YORK, NY 68,66068.7k $837.0k $837.0k 0.00% Reduced -22.7k -22,663
86 Verition Fund Management LLC 0.00% of their portfolio GREENWICH, CT 64,08264.1k $781.2k $781.2k 0.00% New
87 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 62,03962.0k $756.3k $756.3k 0.00% Reduced -713 -713
88 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 58,99459.0k $719.1k $719.1k 0.00% Added +2.3k +2,254
89 THOMPSON DAVIS & CO., INC. 0.47% of their portfolio RICHMOND, VA 57,10057.1k $696.0k $696.0k 0.47% Added +2.5k +2,450
90 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 53,49353.5k $652.1k $652.1k 0.00% Added +3.1k +3,131
91 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 51,44351.4k $627.1k $627.1k 0.00% Reduced -12.3k -12,284
92 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 49,30749.3k $601.1k $601.1k 0.00% Reduced -4.1k -4,119
93 Creative Planning 0.00% of their portfolio OVERLAND PARK, KS 49,15449.2k $599.2k $599.2k 0.00% Added +5.3k +5,263
94 Graham Capital Management, L.P. 0.02% of their portfolio ROWAYTON, CT 48,58348.6k $592.2k $592.2k 0.02% Reduced -38.6k -38,565
95 American Capital Advisory, LLC 0.30% of their portfolio KETCHUM, ID 48,41648.4k $590.2k $590.2k 0.30% Reduced -320 -320
96 IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.05% of their portfolio DUBLIN 2, L2 46,04946.0k $561.3k $561.3k 0.05% Added +11.2k +11,186
97 WINTON GROUP Ltd 0.03% of their portfolio LONDON, X0 43,65043.6k $532.1k $532.1k 0.03% New
98 Canton Hathaway, LLC 0.11% of their portfolio PROVIDENCE, RI 43,20043.2k $527.0k $527.0k 0.11% Added +4.1k +4,100
99 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio TALLAHASSEE, FL 43,02943.0k $524.5k $524.5k 0.00% Unchanged
100 INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio WEST PALM BEACH, FL 41,63841.6k $507.6k $507.6k 0.00% Unchanged