Great Lakes Dredge & Dock Corporation
Great Lakes Dredge & Dock Corporation (GLDD) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · GLDD · as of Sep 30, 2024
Ownership Breakdown
186
Institutional Holders
▲ 12 vs Q2
$576.21M
Total Inst. Value
▲ $100.75M vs Q2
66.78M
Shares Outstanding
freeFloat 92.08%
54.71M
13F Shares Held
▲ 512,338 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
GLDD largest shareholders · institutional ownership
Q3 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. heavy construction other than bldg const - contractors | 7.22M | 10.73% | 10.73% | $75.98B | Nov 13, 2024 | NEW |
DIMENSIONAL FUND ADVISORS LP heavy construction other than bldg const - contractors | 4.42M | 6.58% | 6.58% | $46.56B | Nov 7, 2024 | ▼ 16.6K |
JENNISON ASSOCIATES LLC heavy construction other than bldg const - contractors | 4.33M | 6.45% | 6.45% | $45.63B | Nov 8, 2024 | ▲ 79.1K |
ALLIANCEBERNSTEIN L.P. heavy construction other than bldg const - contractors | 3.89M | 5.79% | 5.79% | $40.95B | Nov 14, 2024 | ▼ 89.5K |
VANGUARD GROUP INC heavy construction other than bldg const - contractors | 3.85M | 5.73% | 5.73% | $40.54B | Nov 13, 2024 | ▲ 278.2K |
HARVEY PARTNERS, LLC heavy construction other than bldg const - contractors | 3.65M | 5.43% | 5.43% | $38.41B | Nov 14, 2024 | ▲ 325.5K |
TCW GROUP INC heavy construction other than bldg const - contractors | 2.10M | 3.12% | 3.12% | $22.07B | Nov 19, 2024 | ▲ 99.7K |
GEODE CAPITAL MANAGEMENT, LLC heavy construction other than bldg const - contractors | 1.56M | 2.32% | 2.32% | $16.45B | Nov 12, 2024 | ▲ 22.2K |
STATE STREET CORP heavy construction other than bldg const - contractors | 1.54M | 2.29% | 2.29% | $16.22B | Nov 14, 2024 | ▲ 13.0K |
MINERVA ADVISORS LLC heavy construction other than bldg const - contractors | 1.34M | 2.00% | 2.00% | $14.12B | Nov 8, 2024 | ▲ 19.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2024 vs prior quarter
Q3 2024
24
Increased
+3.06M shares4
New Positions
first time holders17
Decreased
−1.46M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.59M
+3.06M / −1.46M
Net new holders
+11
4 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
GLDD insider trading · insider activity
Source: SEC Form 4
8
Buy transactions
15
Sell transactions
0.53
Buy/Sell ratio
$3M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Schiffer Vivienne SVP, CLO, CCO & Corp Secretary | Apr 1, 2026 | Award | 28,945 | — | — | 144.8K | Form 4 ↗ |
Schiffer Vivienne SVP, CLO, CCO & Corp Secretary | Apr 1, 2026 | U-Tender | 144,817 | — | — | 0 | Form 4 ↗ |
Petterson Lasse CEO & President | Apr 1, 2026 | Award | 206,445 | — | — | 1.57M | Form 4 ↗ |
Petterson Lasse CEO & President | Apr 1, 2026 | U-Tender | 1,568,290.29 | — | — | 0 | Form 4 ↗ |
Kornblau Scott Lee SVP & CFO | Apr 1, 2026 | Award | 90,518 | — | — | 244.1K | Form 4 ↗ |
Kornblau Scott Lee SVP & CFO | Apr 1, 2026 | U-Tender | 244,126.24 | — | — | 0 | Form 4 ↗ |
JOHANSON DAVID SVP-Project Acquisition & Ops | Apr 1, 2026 | Award | 71,860 | — | — | 191.6K | Form 4 ↗ |
JOHANSON DAVID SVP-Project Acquisition & Ops | Mar 25, 2026 | Award | 521.257 | $10.82 | $5.6K | 119.7K | Form 4 ↗ |
JOHANSON DAVID SVP-Project Acquisition & Ops | Apr 1, 2026 | U-Tender | 191,597.516 | — | — | 0 | Form 4 ↗ |
HANSON WILLIAM H SVP, Market Development | Apr 1, 2026 | Award | 13,631 | — | — | 90.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Great Lakes Dredge & Dock Corporation (GLDD) is primarily owned by institutional investors, who hold approximately 81.9% of total shares outstanding. Company insiders own approximately 7.92%, while retail and public investors account for the remaining 10.16%.
The largest institutional shareholder of Great Lakes Dredge & Dock Corporation is BLACKROCK, INC., holding approximately 7.22 million shares — equal to 10.73% of outstanding shares — as of September 30, 2024.
A total of 186 institutional investors currently hold GLDD stock, with a combined institutional value of approximately $576,208,225 as of the most recent 13F filing period.
Frequently asked questions
GLDD ownershipGreat Lakes Dredge & Dock Corporation (GLDD) is primarily owned by institutional investors, who hold approximately 81.9% of shares. The largest shareholder is BLACKROCK, INC. with a 10.73% stake. Company insiders hold 7.92%. Data sourced from SEC Form 13F as of September 30, 2024.