Great Lakes Dredge & Dock

GLDD • NASDAQ

Great Lakes Dredge & Dock is a engineering & construction company in the industrials sector on NASDAQ, led by Lasse J. Petterson, with a market cap of $937.0M. As of Q3 2025, 80% of shares are held by 210 institutional investors, with BlackRock, Inc. as the largest holder at 10.2%.

Chief Executive Officer and PresidentLasse J. Petterson

Market Cap$937.0M

Engineering & Construction

Industrials

Employees960.0

Websitegldd.com

Country

United States of America

Overview

Overview of institutional ownership in GLDD as of Q3 2025 with a market cap of $815.3M

All Institutions

Institutions: 210
Value Held: $655.0M
Shares Held: 54.6M
Avg Position: $3.1M
Median Position: $443.0K

Hedge Funds

Hedge Funds: 36
Value Held: $95.3M
Shares Held: 8.0M
Avg Position: $2.6M
Median Position: $1.1M

Ownership Breakdown

Institutional (non-HF)

68.65%

$559.7M

Hedge Funds

11.69%

$95.3M

Retail & Other

19.66%

$160.3M

Based on market cap of $815.3M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in GLDD as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
B BlackRock, Inc. Institution	-	$83.2M 0.00% of portfolio	10.20% 6.9M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$51.8M 0.01% of portfolio	6.36% 4.3M shares	≤ Q2 2013 Held for 12y 5m+	$466.32B
JENNISON ASSOCIATES LLC Long Only Manager	Jeffrey Todd Becker CEO	$51.2M 0.03% of portfolio	6.29% 4.3M shares	≤ Q2 2013 Held for 12y 5m+	$171.73B
VANGUARD GROUP INC Institution	Salim Ramji CEO	$46.5M 0.00% of portfolio	5.71% 3.9M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
H Harvey Partners, LLC Institution	-	$44.4M 4.04% of portfolio	5.44% 3.7M shares	Q1 2018 Held for 7y 8m	$1.1B
A AMERICAN CENTURY COMPANIES INC Institution	-	$28.9M 0.01% of portfolio	3.55% 2.4M shares	Q1 2019 Held for 6y 8m	$195.93B
T TCW GROUP INC Institution	-	$22.5M 0.20% of portfolio	2.76% 1.9M shares	Q4 2016 Held for 8y 11m	$11.4B
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$19.6M 0.00% of portfolio	2.40% 1.6M shares	≤ Q2 2013 Held for 12y 5m+	$1.57T
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$19.4M 0.00% of portfolio	2.38% 1.6M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
M Minerva Advisors LLC Hedge Fund•Value	David Peter Cohen President	$16.7M 10.58% of portfolio	2.04% 1.4M shares	≤ Q2 2013 Held for 12y 5m+	$157.5M

Net Capital Flow

Institutional buying and selling activity for GLDD in Q3 2025

Traded: +$1.5M
Buyers: 104
Sellers: 90
Total Bought: +$56.1M
Total Sold: −$54.6M
Avg Position: $3.0M

Biggest Buyers

Institution	Net Bought	Current Position
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$9.6M +797.4K shares	$13.7M 1.1M shares
Q Qube Research & Technologies Ltd Institution	+$4.0M +329.9K shares	$4.6M 381.4K shares
Allspring Global Investments Holdings, LLC Long Only Manager	+$2.9M +246.0K shares	$5.9M 494.0K shares
A AMERICAN CENTURY COMPANIES INC Institution	+$2.8M +231.6K shares	$28.9M 2.4M shares
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager	+$2.4M +199.3K shares	$5.3M 442.1K shares
CenterBook Partners LP Hedge Fund•Market Neutral	+$2.0M +167.1K shares	$6.2M 518.3K shares
S Squarepoint Ops LLC Hedge Fund•Quant	+$2.0M +167.0K shares	$4.5M 377.0K shares
B BlackRock, Inc. Institution	+$1.8M +152.6K shares	$83.2M 6.9M shares
LAZARD ASSET MANAGEMENT LLC Long Only Manager	+$1.8M +151.2K shares	$2.2M 184.9K shares
R Russell Investments Group, Ltd. RIA/Wealth	+$1.6M +131.9K shares	$1.7M 141.1K shares

Biggest Sellers

Institution	Net Sold	Current Position
JENNISON ASSOCIATES LLC Long Only Manager	−$6.2M −519.6K shares	$51.2M 4.3M shares
N Nuveen, LLC Institution	−$4.9M −404.8K shares	$2.5M 212.4K shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	−$3.7M −304.6K shares	$2.0M 164.1K shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	−$3.1M −256.1K shares	Sold Off 0 shares
FIRST TRUST ADVISORS LP ETF Provider	−$2.7M −219.5K shares	Sold Off 0 shares
T TCW GROUP INC Institution	−$2.5M −211.5K shares	$22.5M 1.9M shares
NEXT CENTURY GROWTH INVESTORS LLC Long Only Manager	−$2.4M −201.5K shares	$5.4M 446.8K shares
C Cubist Systematic Strategies, LLC Institution	−$2.1M −175.7K shares	$3.8M 316.5K shares
Trexquant Investment LP Hedge Fund•Quant	−$2.0M −162.9K shares	$1.2M 98.7K shares
PRIVATE MANAGEMENT GROUP INC RIA/Wealth	−$1.8M −149.0K shares	$6.0M 504.5K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited GLDD in Q3 2025

New Positions: 15
New Value: $1.6M
Exited Positions: 12
Exited Value: $8.1M

New Positions

Institution	Position Value
U Universal- Beteiligungs- und Servicegesellschaft mbH Institution	$695.8K 58.0K shares
S Systematic Alpha Investments, LLC RIA/Wealth	$342.9K 28.6K shares
Virtus ETF Advisers LLC Long Only Manager	$140.7K 11.7K shares
HighTower Advisors, LLC RIA/Wealth	$132.5K 11.0K shares
C CI Private Wealth, LLC RIA/Wealth	$125.6K 10.5K shares
S State of Alaska, Department of Revenue Institution	$46.9K 3.9K shares
Caitong International Asset Management Co., Ltd RIA/Wealth	$23.7K 2.0K shares
BLUE BELL PRIVATE WEALTH MANAGEMENT, LLC RIA/Wealth	$17.3K 1.4K shares
A Advisory Services Network, LLC RIA/Wealth	$14.5K 1.2K shares
CULLEN/FROST BANKERS, INC. Institution	$11.9K 989.0 shares

Exited Positions

Institution	Previous Position
WELLINGTON MANAGEMENT CO LLP Long Only Manager	$3.1M 256.1K shares
FIRST TRUST ADVISORS LP ETF Provider	$2.7M 219.5K shares
CWM Advisors, LLC ETF Provider	$884.9K 72.6K shares
C Corton Capital Inc. Institution	$368.3K 30.2K shares
P Prosperity Wealth Management, Inc. RIA/Wealth	$343.8K 28.2K shares
C CAXTON ASSOCIATES LLP Institution	$242.8K 19.9K shares
V Virtu Financial LLC Institution	$184.1K 15.1K shares
COMMONWEALTH EQUITY SERVICES, LLC. RIA/Wealth	$170.8K 14.0K shares
Gitterman Wealth Management, LLC RIA/Wealth	$82.5K 6.8K shares
S STRS OHIO Institution	$41.4K 3.4K shares

Options Activity

Institutions with the largest Call and Put options positions in GLDD as of Q3 2025

Call Positions: 5
Call Value: $2.7M
Put Positions: 1
Put Value: $279.4K

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$1.1M 932.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$621.1K 518.0 contracts
Caption Management, LLC Hedge Fund•Long/Short	$479.6K 400.0 contracts
J JANE STREET GROUP, LLC Institution	$471.2K 393.0 contracts
P PEAK6 LLC Institution	- - contracts

Put Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$279.4K 233.0 contracts

Most Committed Institutions

Institutions with GLDD as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
M Minerva Advisors LLC Hedge Fund•Value	David Peter Cohen President	10.58% $16.7M	2.04% 1.4M shares	≤ Q2 2013 Held for 12y 5m+	$157.5M
H Harvey Partners, LLC Institution	-	4.04% $44.4M	5.44% 3.7M shares	Q1 2018 Held for 7y 8m	$1.1B
A Acuitas Investments, LLC Fund of Funds	Lisa Marie Thenell COO	3.26% $5.1M	0.62% 423.2K shares	Q4 2023 Held for 1y 11m	$155.8M
CASTLEKEEP INVESTMENT ADVISORS LLC RIA/Wealth	Charles Wesley Kelakos Haberstroh CEO	2.59% $5.4M	0.67% 454.5K shares	Q4 2023 Held for 1y 11m	$210.3M
S Seven Six Capital Management, LLC Institution	-	2.11% $2.1M	0.26% 178.5K shares	Q4 2024 Held for 11 months	$101.4M
W WITTENBERG INVESTMENT MANAGEMENT, INC. RIA/Wealth	Joel Wittenberg President	0.92% $2.3M	0.28% 191.8K shares	Q4 2022 Held for 2y 11m	$250.3M
P PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. Hedge Fund•Long/Short	Matthew Nicholas Dunham President	0.73% $6.9M	0.85% 576.9K shares	Q3 2022 Held for 3y 2m	$948.6M
Semanteon Capital Management, LP Hedge Fund•Long/Short	Rajat Lal Managing Partner	0.71% $568.6K	0.07% 47.4K shares	Q4 2024 Held for 11 months	$79.7M
ESSEX INVESTMENT MANAGEMENT CO LLC Long Only Manager	Nancy Beth Prial CEO	0.57% $3.7M	0.45% 308.8K shares	Q3 2023 Held for 2y 2m	$652.5M
Jackson Creek Investment Advisors LLC Long Only Manager	Mark Frederick Jaeger Managing Partner	0.51% $1.8M	0.22% 147.5K shares	Q4 2024 Held for 11 months	$345.2M

Hedge Fund Spotlight

Discover hedge funds investing in GLDD

GSA CAPITAL PARTNERS LLP

Hedge Fund • Quant

Portfolio ManagerDavid Khabie-Zeitoune

Portfolio Value: $1.1B
Positions: 1,504
Last Reported: Q3 2025

Sector Allocation

Position in Great Lakes Dredge & Dock

Market Value: $1.8M
Shares Held: 149.5K
Portfolio Weight: 0.16%
Owned Since: 2022-Q4

Top Holding	Sector	Market Value	Weight
1 Accenture ACN	Information Technology Services Technology	$5.6M	0.50%
2 Sprouts Farmers Market SFM	Grocery Stores Consumer Defensive	$5.2M	0.46%
3 Microsoft MSFT	Software - Infrastructure Technology	$4.8M	0.43%