What percentage of GLDD is owned by institutions?

Based on Q1 2026 13F filings, institutional ownership of Great Lakes Dredge & Dock Corporation stands at 77.6%, held across 180 reporting institutions.

Who is the largest institutional holder of GLDD?

BlackRock, Inc. is the largest reported institutional holder of GLDD, with approximately 5,917,589 shares worth $0.10B as of Q1 2026.

Is GLDD a hedge fund favorite?

Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of GLDD, including TWO SIGMA INVESTMENTS, LP, MILLENNIUM MANAGEMENT LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.

What is GLDD's Smart Money Score?

Our composite Smart Money Score for GLDD is 59 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.

How many institutions bought GLDD this quarter?

56 institutions opened new positions in GLDD during Q1 2026, while 96 fully exited. 83 added to existing positions and 40 trimmed.

How is institutional ownership of GLDD changing?

GLDD institutional ownership rose by 13.58 percentage points quarter-over-quarter, with a net change of -40 holders.

How concentrated is GLDD ownership among the top holders?

The top 10 institutions account for 50.3% of all reported 13F value in GLDD, and the top 25 account for 76.5%.

Where does this GLDD institutional ownership data come from?

All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.

Great Lakes Dredge & Dock Corporation (GLDD) Institutional Ownership Q1 2026 | Top 13F Holders

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Institutional ownership increased this quarter (+13.58 pp), though top 10 holders maintain a highly concentrated 50.3% of institutional value.

Institutional Ownership77.6%$881M total value · ▲ +13.58 pp vs prior quarter

Smart Money Score

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Top Institutional Holders of GLDD

Ranked by reported Q1 2026 13F market value

Top 10 Holders

50.3%

Top 25 Holders

76.5%

Share of total reported institutional value in GLDD held by the largest 10 / 25 filers.

#	Institution	Shares Held	Market Value	QoQ Change	Ownership %	% of Fund
1	BlackRock, Inc.	5.9M	$100.6M	-14.2%	8.861%	0.00%
2	DIMENSIONAL FUND ADVISORS LP	3.4M	$57.6M	-21.3%	5.071%	0.01%
3	AMERICAN CENTURY COMPANIES INC	3.0M	$51.1M	+16.3%	4.502%	0.03%
4	VANGUARD CAPITAL MANAGEMENT LLC	2.9M	$48.6M	—	4.277%	0.00%
5	FIL Ltd	2.7M	$45.4M	—	4.000%	0.04%
6	TWO SIGMA INVESTMENTS, LP	2.0M	$33.8M	+248.6%	2.979%	0.03%
7	GEODE CAPITAL MANAGEMENT, LLC	1.7M	$28.5M	+2.9%	2.513%	0.00%
8	BALYASNY ASSET MANAGEMENT LLC	1.6M	$27.7M	—	2.436%	0.09%
9	STATE STREET CORP	1.6M	$26.8M	-0.7%	2.362%	0.00%
10	Qube Research & Technologies Ltd	1.4M	$23.5M	+119.6%	2.072%	0.03%
11	WATER ISLAND CAPITAL LLC	1.3M	$21.5M	—	1.892%	2.86%
12	ODDO BHF ASSET MANAGEMENT SAS	1.2M	$19.8M	—	1.747%	0.78%
13	MILLENNIUM MANAGEMENT LLC	1.1M	$19.2M	-29.2%	1.694%	0.01%
14	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	1.1M	$17.9M	+32.4%	1.579%	0.01%
15	Minerva Advisors LLC	1.0M	$17.5M	-25.9%	1.542%	11.30%
16	JENNISON ASSOCIATES LLC	1.0M	$17.5M	-73.0%	1.541%	0.01%
17	Beryl Capital Management LLC	913K	$15.5M	—	1.367%	14.28%
18	Sand Grove Capital Management LLP	893K	$15.2M	—	1.337%	3.55%
19	OMERS ADMINISTRATION Corp	864K	$14.7M	—	1.294%	0.09%
20	GOLDMAN SACHS GROUP INC	859K	$14.6M	+35.3%	1.286%	0.00%
21	CNH PARTNERS LLC	731K	$12.4M	—	1.094%	0.20%
22	SUSQUEHANNA INTERNATIONAL GROUP, LLP	731K	$12.4M	+510.6%	1.094%	0.00%
23	NORTHERN TRUST CORP	669K	$11.4M	+5.1%	1.002%	0.00%
24	TIG Advisors, LLC	643K	$10.9M	—	0.963%	0.56%
25	Harvey Partners, LLC	610K	$10.4M	-83.5%	0.913%	0.84%

denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in GLDD — a direct measure of their conviction.

GLDD Institutional Ownership by Quarter

8 quarters of 13F filings · Δ columns show change vs prior quarter

Quarter	Inst. Holders	Δ Holders	Ownership %	Δ Ownership	Total 13F Value	Δ Value
Q1 2026	180	18%	77.65%	+13.58 pp	$881M	+21%
Q4 2025	220	+6.3%	64.07%	+7.48 pp	$727M	+13%
Q3 2025	207	+10%	56.59%	0.56 pp	$642M	1.0%
Q2 2025	188	1.1%	57.15%	+15.82 pp	$649M	+38%
Q1 2025	190	2.1%	41.33%	12.19 pp	$469M	23%
Q4 2024	194	+9.6%	53.52%	+4.68 pp	$608M	+9.6%
Q3 2024	177	+6.6%	48.84%	+8.14 pp	$554M	+20%
Q2 2024	166	—	40.70%	—	$462M	—

Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.

Great Lakes Dredge & Dock Corporation (GLDD) Institutional Ownership

Great Lakes Dredge & Dock Corporation (GLDD) Institutional Ownership

AI Insights & Key Takeaways

Top Institutional Holders of GLDD

Quarterly Institutional Activity

GLDD Institutional Ownership by Quarter

GLDD — Frequently Asked Questions