Vault-13

GREAT LAKES DREDGE & DOCK CO GLDD

COM · Common Stock · CUSIP 390607109

134 institutional holders -7 vs Q1 2023
54,755,62454.8m shares reported held*
$446.4mreported value*
13 new 51 added 47 reduced 19 sold out net sold ≈ $9.4m (-1.2m 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. Holder counts are more reliable. Implied quarter-end price ≈ $8.15. Options: 6 managers hold calls ($1.6m notional), 4 hold puts ($6.3m).

Trends to Q2 2023

Institutional holders

Managers reporting a position, each quarter

050100150Q3 22: 137Q4 22: 143Q1 23: 141Q2 23: 134134Q3 22Q4 22Q1 23Q2 23
Numbers
QuarterHolders
Q3 2022137
Q4 2022143
Q1 2023141
Q2 2023134

Buyers vs sellers

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

Bought or addedCut or sold out
1000100Q4 22: 84 bought or addedQ4 22: 63 cut or sold outQ4 22Q1 23: 89 bought or addedQ1 23: 56 cut or sold outQ1 23Q2 23: 64 bought or addedQ2 23: 66 cut or sold outQ2 23
Numbers
QuarterBought or addedCut or sold out
Q4 20228463
Q1 20238956
Q2 20236466

Calls vs puts

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

CallsPuts
$0$2m$4m$6m$8mQ3 22 calls: $0Q3 22 puts: $5.8mQ3 22P/C —Q4 22 calls: $36.1kQ4 22 puts: $4.5mQ4 22P/C 124.59Q1 23 calls: $120.5kQ1 23 puts: $4.1mQ1 23P/C 34.04Q2 23 calls: $1.6mQ2 23 puts: $6.3mQ2 23P/C 4.04
Numbers
QuarterCallsPutsP/C
Q3 2022$0$5.8m—
Q4 2022$36.1k$4.5m124.59
Q1 2023$120.5k$4.1m34.04
Q2 2023$1.6m$6.3m4.04

Biggest buyers

ALLIANCEBERNSTEIN L.P. Added +849,506+849.5k
MILLENNIUM MANAGEMENT LLC Added +222,792+222.8k
CITADEL ADVISORS LLC Added +161,005+161.0k
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added +114,091+114.1k
Cullen Capital Management, LLC Added +109,405+109.4k
Knights of Columbus Asset Advisors LLC Added +106,096+106.1k
Flat Footed LLC Added +98,239+98.2k
JENNISON ASSOCIATES LLC Added +96,930+96.9k
GSA CAPITAL PARTNERS LLP New +92,044+92.0k
WHITE PINE CAPITAL LLC Added +85,200+85.2k

Biggest sellers

EVR Research LP Sold out -540,000-540.0k
ASHFORD CAPITAL MANAGEMENT INC Reduced -484,060-484.1k
RENAISSANCE TECHNOLOGIES LLC Reduced -355,700-355.7k
D. E. Shaw & Co., Inc. Reduced -304,651-304.7k
Walleye Capital LLC Reduced -289,456-289.5k
TWO SIGMA INVESTMENTS, LP Reduced -259,069-259.1k
VANGUARD GROUP INC Reduced -208,701-208.7k
MARSHALL WACE, LLP Reduced -149,504-149.5k
272 Capital LP Reduced -121,866-121.9k
CREDIT SUISSE AG/ Reduced -119,839-119.8k

Biggest calls

Caption Management, LLC New $816.0k100.0k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP New $417.0k51.1k shares
CITADEL ADVISORS LLC Added $284.0k34.8k shares
SIMPLEX TRADING, LLC Added $34.0k4.2k shares
GROUP ONE TRADING LLC New $4.9k600 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

BANK OF AMERICA CORP /DE/ Unchanged $6.1m750.0k shares
CITADEL ADVISORS LLC Added $151.8k18.6k shares
SIMPLEX TRADING, LLC New $19.0k2.4k 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 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 BlackRock Inc. 0.00% of their portfolio New York, NY 6,718,6136.7m $54.8m $54.8m 0.00% Reduced -83.6k -83,552
2 ALLIANCEBERNSTEIN L.P. 0.02% of their portfolio NASHVILLE, TN 4,935,5104.9m $40.3m $40.3m 0.02% Added +849.5k +849,506
3 DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio AUSTIN, TX 4,036,8794.0m $32.9m $32.9m 0.01% Reduced -3.8k -3,792
4 Harvey Partners, LLC 3.39% of their portfolio Tarrytown, NY 3,355,0003.4m $27.4m $27.4m 3.39% Added +15.0k +15,000
5 JENNISON ASSOCIATES LLC 0.02% of their portfolio NEW YORK, NY 3,251,3163.3m $26.5m $26.5m 0.02% Added +96.9k +96,930
6 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 3,153,1593.2m $25.7m $25.7m 0.00% Reduced -208.7k -208,701
7 WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.07% of their portfolio CHICAGO, IL 2,686,4242.7m $21.9m $21.9m 0.07% Added +49.7k +49,698
8 Flat Footed LLC 6.84% of their portfolio WILSON, WY 2,308,7502.3m $18.8m $18.8m 6.84% Added +98.2k +98,239
9 TCW GROUP INC 0.16% of their portfolio LOS ANGELES, CA 1,740,5381.7m $14.2m $14.2m 0.16% Added +39.3k +39,300
10 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 1,427,7401.4m $11.7m $11.7m 0.00% Reduced -784 -784
11 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 1,326,3321.3m $10.8m $10.8m 0.00% Added +24.4k +24,359
12 PRIVATE MANAGEMENT GROUP INC 0.44% of their portfolio IRVINE, CA 1,267,1861.3m $10.3m $10.3m 0.44% Reduced -2.8k -2,832
13 Minerva Advisors LLC 6.81% of their portfolio BALA CYNWYD, PA 1,208,2981.2m $9.8m $9.8m 6.81% Unchanged
14 Price Jennifer C. 2.90% of their portfolio NEW YORK, NY 1,033,8741.0m $8.4m $8.4m 2.90% Unchanged
15 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 1,002,0131.0m $8.2m $8.2m 0.00% Added +73.2k +73,184
16 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 934,374934.4k $7.6m $7.6m 0.01% Reduced -304.7k -304,651
17 KENNEDY CAPITAL MANAGEMENT LLC 0.15% of their portfolio ST LOUIS, MO 792,130792.1k $6.5m $6.5m 0.15% Added +77.4k +77,365
18 CREDIT SUISSE AG/ 0.01% of their portfolio ZURICH, V8 761,023761.0k $6.2m $6.2m 0.01% Reduced -119.8k -119,839
19 RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio NEW YORK, NY 729,801729.8k $6.0m $6.0m 0.01% Reduced -355.7k -355,700
20 LONDON CO OF VIRGINIA 0.03% of their portfolio RICHMOND, VA 642,744642.7k $5.2m $5.2m 0.03% Added +58.3k +58,320
21 Cove Street Capital, LLC 1.56% of their portfolio El Segundo, CA 616,527616.5k $5.0m $5.0m 1.56% Reduced -84.7k -84,650
22 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 604,483604.5k $4.9m $4.9m 0.00% Added +11.0k +10,981
23 Prescott Group Capital Management, L.L.C. 0.97% of their portfolio Tulsa, OK 542,145542.1k $4.4m $4.4m 0.97% Unchanged
24 Nuveen Asset Management, LLC 0.00% of their portfolio CHICAGO, IL 504,300504.3k $4.1m $4.1m 0.00% Added +8.5k +8,486
25 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 408,636408.6k $3.3m $3.3m 0.00% Added +20.4k +20,381
26 272 Capital LP 1.11% of their portfolio DALLAS, TX 370,307370.3k $3.0m $3.0m 1.11% Reduced -121.9k -121,866
27 WYNNEFIELD CAPITAL INC 1.50% of their portfolio NEW YORK, NY 367,125367.1k $3.0m $3.0m 1.50% Reduced -57.5k -57,535
28 Oppenheimer & Close, LLC 2.92% of their portfolio NEW YORK, NY 344,200344.2k $2.8m $2.8m 2.92% Unchanged
29 ALGERT GLOBAL LLC 0.11% of their portfolio SAN FRANCISCO, CA 307,423307.4k $2.5m $2.5m 0.11% Added +66.4k +66,390
30 WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio Boston, MA 303,085303.1k $2.5m $2.5m 0.00% Added +15.1k +15,090
31 ASHFORD CAPITAL MANAGEMENT INC 0.34% of their portfolio WILMINGTON, DE 301,876301.9k $2.5m $2.5m 0.34% Reduced -484.1k -484,060
32 FIRST MANHATTAN CO. LLC. 0.01% of their portfolio NEW YORK, NY 300,000300.0k $2.4m $2.4m 0.01% Unchanged
33 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 289,374289.4k $2.4m $2.4m 0.00% Added +161.0k +161,005
34 North Star Investment Management Corp. 0.18% of their portfolio CHICAGO, IL 267,353267.4k $2.2m $2.2m 0.18% Unchanged
35 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 267,336267.3k $2.2m $2.2m 0.00% Added +222.8k +222,792
36 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 264,189264.2k $2.2m $2.2m 0.00% Added +697 +697
37 Knights of Columbus Asset Advisors LLC 0.19% of their portfolio NEW HAVEN, CT 262,105262.1k $2.1m $2.1m 0.19% Added +106.1k +106,096
38 TWO SIGMA ADVISERS, LP 0.01% of their portfolio NEW YORK, NY 260,867260.9k $2.1m $2.1m 0.01% Reduced -40.1k -40,100
39 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 260,608260.6k $2.1m $2.1m 0.00% Added +70.0k +70,008
40 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 257,640257.6k $2.1m $2.1m 0.00% Added +36.6k +36,630
41 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 245,641245.6k $2.0m $2.0m 0.00% Reduced -458 -458
42 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 243,882243.9k $2.0m $2.0m 0.00% Added +1.6k +1,565
43 BOOTHBAY FUND MANAGEMENT, LLC 0.05% of their portfolio NEW YORK, NY 214,396214.4k $1.7m $1.7m 0.05% Reduced -72.4k -72,447
44 Cullen Capital Management, LLC 0.01% of their portfolio New York, NY 202,883202.9k $1.7m $1.7m 0.01% Added +109.4k +109,405
45 WITTENBERG INVESTMENT MANAGEMENT, INC. 0.59% of their portfolio CARLISLE, MA 200,324200.3k $1.6m $1.6m 0.59% Reduced -11.3k -11,293
46 ROYCE & ASSOCIATES LP 0.01% of their portfolio New York, NY 186,853186.9k $1.5m $1.5m 0.01% Unchanged
47 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 163,454163.5k $1.3m $1.3m 0.00% Reduced -259.1k -259,069
48 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 153,374153.4k $1.3m $1.3m 0.00% Added +114.1k +114,091
49 WHITE PINE CAPITAL LLC 0.43% of their portfolio BLOOMINGTON, MN 142,860142.9k $1.2m $1.2m 0.43% Added +85.2k +85,200
50 Swiss National Bank 0.00% of their portfolio ZURICH, V8 142,800142.8k $1.2m $1.2m 0.00% Unchanged
51 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 130,081130.1k $706.3k $706.3k 0.00% Unchanged
52 VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio San Antonio, TX 126,707126.7k $1.0m $1.0m 0.00% Reduced -8.8k -8,810
53 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 113,445113.4k $925.7k $925.7k 0.00% Reduced -14.4k -14,390
54 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 104,661104.7k $854.0k $854.0k 0.00% Added +6.6k +6,640
55 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 101,804101.8k $831.0k $831.0k 0.00% Added +3.4k +3,379
56 GSA CAPITAL PARTNERS LLP 0.08% of their portfolio LONDON, X0 92,04492.0k $751.0k $751.0k 0.08% New
57 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 80,16880.2k $654.2k $654.2k 0.00% Reduced -2.3k -2,262
58 New York Life Investment Management LLC 0.01% of their portfolio New York, NY 75,89975.9k $619.3k $619.3k 0.01% Reduced -12.9k -12,901
59 Barnett & Company, Inc. 0.43% of their portfolio CHATTANOOGA, TN 70,80070.8k $577.7k $577.7k 0.43% Added +4.9k +4,900
60 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 70,55970.6k $575.8k $575.8k 0.00% Reduced -10.4k -10,425
61 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 69,29969.3k $565.5k $565.5k 0.00% Reduced -18.9k -18,946
62 JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio FLORHAM PARK, NJ 66,03766.0k $538.9k $538.9k 0.00% Reduced -47 -47
63 CenterBook Partners LP 0.06% of their portfolio GREENWICH, CT 58,89858.9k $480.6k $480.6k 0.06% Reduced -60.6k -60,597
64 Legal & General Group Plc 0.00% of their portfolio London, X0 54,25654.3k $442.7k $442.7k 0.00% Added +37.2k +37,240
65 UBS Group AG 0.00% of their portfolio ZURICH, V8 52,65052.6k $429.6k $429.6k 0.00% Added +2.2k +2,211
66 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 51,23351.2k $418.1k $418.1k 0.00% Reduced -93.8k -93,798
67 IMA Advisory Services, Inc. 0.10% of their portfolio DENVER, CO 48,86448.9k $398.7k $398.7k 0.10% Reduced -43.9k -43,866
68 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 43,54143.5k $355.3k $355.3k 0.00% Reduced -149.5k -149,504
69 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio TALLAHASSEE, FL 42,97943.0k $350.7k $350.7k 0.00% Reduced -10 -10
70 Creative Planning 0.00% of their portfolio OVERLAND PARK, KS 42,10242.1k $343.6k $343.6k 0.00% Added +30.9k +30,936
71 Canton Hathaway, LLC 0.10% of their portfolio PROVIDENCE, RI 38,50038.5k $314.0k $314.0k 0.10% New
72 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 38,41038.4k $313.4k $313.4k 0.00% Reduced -16.1k -16,095
73 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 34,46434.5k $281.2k $281.2k 0.00% Unchanged
74 AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio New York, NY 31,57231.6k $257.6k $257.6k 0.00% Added +26 +26
75 ExodusPoint Capital Management, LP 0.00% of their portfolio NEW YORK, NY 30,83430.8k $252.0k $252.0k 0.00% New
76 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 30,16930.2k $246.0k $246.0k 0.00% New
77 JANUS HENDERSON GROUP PLC 0.00% of their portfolio LONDON, X0 29,56529.6k $241.0k $241.0k 0.00% Reduced -34 -34
78 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 28,52928.5k $232.8k $232.8k 0.00% Reduced -4.5k -4,539
79 OPPENHEIMER ASSET MANAGEMENT INC. 0.00% of their portfolio NEW YORK, NY 28,38328.4k $231.6k $231.6k 0.00% Added +607 +607
80 Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio SEOUL, M5 28,10728.1k $229.4k $229.4k 0.00% Unchanged
81 QUADRANT CAPITAL GROUP LLC 0.02% of their portfolio CINCINNATI, OH 27,90127.9k $227.7k $227.7k 0.02% Added +17.6k +17,577
82 AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio Greenwich, CT 27,79927.8k $226.8k $226.8k 0.00% Reduced -32.6k -32,552
83 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 27,47727.5k $224.2k $224.2k 0.00% Added +19.1k +19,055
84 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 27,46027.5k $224.1k $224.1k 0.00% Added +1.5k +1,453
85 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 27,08127.1k $221.0k $221.0k 0.00% Added +1.1k +1,055
86 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 27,05227.1k $220.7k $220.7k 0.00% Added +13.7k +13,729
87 XTX Topco Ltd 0.04% of their portfolio LONDON, X0 26,63826.6k $217.4k $217.4k 0.04% New
88 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 24,76124.8k $202.1k $202.1k 0.00% Added +13.8k +13,846
89 IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.04% of their portfolio DUBLIN 2, L2 24,36224.4k $198.8k $198.8k 0.04% Reduced -4.2k -4,189
90 ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio Berwyn, PA 23,38823.4k $190.8k $190.8k 0.00% Added +726 +726
91 KEYBANK NATIONAL ASSOCIATION/OH 0.00% of their portfolio BROOKLYN, OH 21,24021.2k $173.3k $173.3k 0.00% Added +1.0k +1,009
92 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 19,55119.6k $159.9k $159.9k 0.00% Reduced -2.0k -1,998
93 Pinnacle Wealth Planning Services, Inc. 0.03% of their portfolio MANSFIELD, OH 19,40119.4k $158.3k $158.3k 0.03% Added +214 +214
94 ARIZONA STATE RETIREMENT SYSTEM 0.00% of their portfolio PHOENIX, AZ 18,63218.6k $152.0k $152.0k 0.00% Reduced -541 -541
95 EVERGREEN CAPITAL MANAGEMENT LLC 0.01% of their portfolio Bellevue, WA 17,68317.7k $144.3k $144.3k 0.01% New
96 Walleye Capital LLC 0.00% of their portfolio NEW YORK, NY 17,43317.4k $142.3k $142.3k 0.00% Reduced -289.5k -289,456
97 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 16,99117.0k $138.6k $138.6k 0.00% Reduced -5.7k -5,705
98 SIGNATUREFD, LLC 0.00% of their portfolio ATLANTA, GA 16,46416.5k $134.3k $134.3k 0.00% Added +9.6k +9,639
99 LOGAN CAPITAL MANAGEMENT INC 0.01% of their portfolio Newtown Square, PA 15,93215.9k $130.0k $130.0k 0.01% Unchanged
100 LEVIN CAPITAL STRATEGIES, L.P. 0.01% of their portfolio NEW YORK, NY 15,00015.0k $122.4k $122.4k 0.01% Reduced -7.0k -7,000