Great Lakes Dredge & Dock CORP GLDD
CIK 0001372020 · CUSIP 390607109
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | BlackRock, Inc. CIK 2012383 · View history | $62.33M 7,163,887 shares | 0.00% | +50.13K(+0.70%)Added | SEC filing ↗ May 2, 2025 | ▾ |
| 02 | JENNISON ASSOCIATES LLC CIK 53417 · View history | $46.20M 5,310,894 shares | 0.03% | +981.65K(+22.70%)Added | SEC filing ↗ May 5, 2025 | ▾ |
| 03 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $37.74M 4,337,446 shares | 0.01% | -106.14K(-2.40%)Reduced | SEC filing ↗ May 13, 2025 | ▾ |
| 04 | VANGUARD GROUP INC CIK 102909 · View history | $33.99M 3,907,174 shares | 0.00% | +29.59K(+0.80%)Added | SEC filing ↗ May 9, 2025 | ▾ |
| 05 | Harvey Partners, LLC CIK 1406484 · View history | $32.48M 3,733,000 shares | 3.85% | +29.00K(+0.80%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 06 | ALLIANCEBERNSTEIN L.P. CIK 1109448 · View history | $23.36M 2,685,229 shares | 0.01% | -180.89K(-6.30%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 07 | TCW GROUP INC CIK 850401 · View history | $18.74M 2,153,534 shares | 0.17% | +82.70K(+4.00%)Added | SEC filing ↗ May 7, 2025 | ▾ |
| 08 | AMERICAN CENTURY COMPANIES INC CIK 748054 · View history | $17.15M 1,970,775 shares | 0.01% | +355.18K(+22.00%)Added | SEC filing ↗ May 13, 2025 | ▾ |
| 09 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $13.97M 1,605,278 shares | 0.00% | +45.46K(+2.90%)Added | SEC filing ↗ May 13, 2025 | ▾ |
| 10 | STATE STREET CORP CIK 93751 · View history | $13.66M 1,570,402 shares | 0.00% | -9.32K(-0.60%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 11 | Minerva Advisors LLC CIK 1541536 · Amended · View history | $12.09M 1,389,807 shares | 8.59% | +48.00K(+3.60%)Added | SEC filing ↗ May 9, 2025 | ▾ |
| 12 | PRIVATE MANAGEMENT GROUP INC CIK 1142031 · Amended · View history | $9.94M 1,142,542 shares | 0.35% | -76.31K(-6.30%)Reduced | SEC filing ↗ May 7, 2025 | ▾ |
| 13 | CenterBook Partners LP CIK 1872738 · View history | $9.76M 1,121,974 shares | 0.62% | +705.16K(+169.20%)Added | SEC filing ↗ May 9, 2025 | ▾ |
| 14 | MORGAN STANLEY CIK 895421 · View history | $6.09M 700,564 shares | 0.00% | -111.75K(-13.80%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 15 | NEXT CENTURY GROWTH INVESTORS LLC CIK 1134007 · View history | $5.79M 665,282 shares | 0.51% | -2.18K(-0.30%)Reduced | SEC filing ↗ May 14, 2025 | ▾ |
| 16 | LONDON CO OF VIRGINIA CIK 1259887 · View history | $5.59M 642,744 shares | 0.03% | 0(0.00%)Unchanged | SEC filing ↗ May 15, 2025 | ▾ |
| 17 | NORTHERN TRUST CORP CIK 73124 · View history | $5.50M 632,001 shares | 0.00% | -32.09K(-4.80%)Reduced | SEC filing ↗ May 13, 2025 | ▾ |
| 18 | JPMORGAN CHASE & CO CIK 19617 · View history | $5.42M 623,110 shares | 0.00% | -197.29K(-24.00%)Reduced | SEC filing ↗ May 12, 2025 | ▾ |
| 19 | Prescott Group Capital Management, L.L.C. CIK 1166152 · View history | $5.02M 576,870 shares | 0.73% | +30.00K(+5.50%)Added | SEC filing ↗ May 7, 2025 | ▾ |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · Amended · View history | $4.67M 536,718 shares | 0.00% | -155.27K(-22.40%)Reduced | SEC filing ↗ Sep 15, 2025 | ▾ |
Showing 20 / 193 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 193 reporting institutions.
This page includes 20 of 193 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
+ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 193 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.
MCP https://api.akkrudata.ai/mcp
akkru_institutional_holdings
{"action":"holders","cusip":"390607109","quarter":"2025Q1","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP / CLI documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.