Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

GREAT LAKES DREDGE & DOCK CO

CIK 0000043365· quarter ending 2026-06-30

Shares outstanding

—

no XBRL cover page found

Held by 13F filers

across share classes — see % per class below

Holders

-181 vs 2026-03-31 · 0 new, 181 exited

Value

$17

shares -100.0% vs prior quarter

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	390607109	COMMON STOCK	1	1	—	—	$17	—	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (1 of 1 · 390607109)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	HUNTINGTON NATIONAL BANK	1	—	$17	—

Exited since 2026-03-31 (181 filers; largest 25 shown)

BlackRock, Inc.	−5,917,589
DIMENSIONAL FUND ADVISORS LP	−3,386,372
AMERICAN CENTURY COMPANIES INC	−3,006,419
GLAZER CAPITAL, LLC	−2,949,613
VANGUARD CAPITAL MANAGEMENT LLC	−2,856,158
FIL Ltd	−2,671,231
TWO SIGMA INVESTMENTS, LP	−1,989,521
GEODE CAPITAL MANAGEMENT, LLC	−1,678,166
Balyasny Asset Management L.P.	−1,626,990
STATE STREET CORP	−1,577,722
Qube Research & Technologies Ltd	−1,383,585
WATER ISLAND CAPITAL LLC	−1,263,580
ODDO BHF ASSET MANAGEMENT SAS	−1,166,388
MILLENNIUM MANAGEMENT LLC	−1,131,127
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	−1,054,360
Minerva Advisors LLC	−1,029,703
JENNISON ASSOCIATES LLC	−1,029,264
Beryl Capital Management LLC	−912,537
Sand Grove Capital Management LLP	−893,190
OMERS ADMINISTRATION Corp	−864,000
GOLDMAN SACHS GROUP INC	−858,621
AQR Arbitrage LLC	−730,615
NORTHERN TRUST CORP	−669,478
TIG Advisors, LLC	−642,867
Harvey Partners, LLC	−610,000

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Harvey Partners, LLC	SCHEDULE 13G/A	2026-05-15	2026-03-31	610,000	0.9%
PRUDENTIAL FINANCIAL INC	SCHEDULE 13G/A	2026-05-08	2026-03-31	1,226,033	1.8%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.