DOSSIER · 13F Holders · Q1 2026Industrials · Heavy Construction Other Than Bldg Const - Contractors
GLDD

GREAT LAKES DREDGE & DOCK CO

169 institutions still hold GREAT LAKES DREDGE & DOCK CO as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 390607109·Heavy Construction Other Than Bldg Const - Contractors·169 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$712M
visible holders
Holders
169
filers reporting
Concentration
14.13%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

169 institutions reported GLDD in Q1 2026. BlackRock, Inc. leads at 14.1% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$101M5.9M0.00%Q1 2026
02
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$58M3.4M0.01%Q1 2026
03
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$51M3.0M0.03%Q1 2026
04
GLAZER CAPITAL, LLC
CIK 0001076809
$50M2.9M1.06%Q1 2026
05
JENNISON ASSOCIATES LLC
CIK 0000053417
$50M3.8M0.03%Q4 2025
06
Harvey Partners, LLC
CIK 0001406484
$49M3.7M4.31%Q4 2025
07
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$49M2.9M0.00%Q1 2026
08
FIL Ltd
CIK 0000318989
$45M2.7M0.04%Q1 2026
09
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$34M2.0M0.03%Q1 2026
10
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$29M1.7M0.00%Q1 2026
11
BALYASNY ASSET MANAGEMENT L.P.
CIK 0001218710
$28M1.6M0.04%Q1 2026
12
STATE STREET CORP
CIK 0000093751
$27M1.6M0.00%Q1 2026
13
Qube Research & Technologies Ltd
CIK 0001729829
$24M1.4M0.03%Q1 2026
14
ODDO BHF ASSET MANAGEMENT SAS
CIK 0001686970
$20M1.2M0.78%Q1 2026
15
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$19M1.1M0.01%Q1 2026
16
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
$18M1.1M0.01%Q1 2026
17
Minerva Advisors LLC
CIK 0001541536
$18M1.0M11.30%Q1 2026
18
Beryl Capital Management LLC
CIK 0001719307
$16M913K14.14%Q1 2026
19
Sand Grove Capital Management LLP
CIK 0001665077
$15M893K3.42%Q1 2026
20
OMERS ADMINISTRATION Corp
CIK 0001053321
$15M864K0.09%Q1 2026
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Insiders at GREAT LAKES DREDGE & DOCK CO
Bayer RyanGunsten ChristopherBeyko EleniArmstrong Dana ASchiffer VivienneHanson William HShipp Earl LSteger Ronald