# GREAT LAKES DREDGE & DOCK CO COM

GREAT LAKES DREDGE & DOCK CO COM is a security (CUSIP 390607109) tracked across SEC portfolio filings. 141 institutional managers reported $845.9M on Form 13F as of 2026-03-31; 14 registered fund positions totaling $27.8M via N-PORT as of 2026-03-31.

## Summary

- Issuer: GREAT LAKES DREDGE & DOCK CO
- Class: COM
- CUSIP: 390607109
- Asset category: EC
- 13F holders: 141
- 13F value: $845.9M
- 13F period: 2026-03-31
- N-PORT fund positions: 14
- N-PORT value: $27.8M
- N-PORT report: 2026-03-31

## Top institutional holders (Form 13F)

_Showing 15 of 141 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $100.6M | 5,917,589 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $57.6M | 3,386,372 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $52.3M | 3,987,334 |
| AMERICAN CENTURY COMPANIES INC | KANSAS CITY, MO | $51.1M | 3,006,419 |
| FIL Ltd | HAMILTON, D0 | $45.4M | 2,671,231 |
| [TWO SIGMA INVESTMENTS, LP](https://search.stillhousedata.com/firm/137137) | New York, NY | $33.8M | 1,989,521 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $28.5M | 1,678,166 |
| [Balyasny Asset Management L.P.](https://search.stillhousedata.com/firm/138111) | Chicago, IL | $27.7M | 1,626,990 |
| STATE STREET CORP | BOSTON, MA | $26.8M | 1,577,722 |
| [Qube Research & Technologies Ltd](https://search.stillhousedata.com/firm/304552) | LONDON, X0 | $23.5M | 1,383,585 |
| [WATER ISLAND CAPITAL LLC](https://search.stillhousedata.com/firm/113358) | New York, NY | $21.5M | 1,263,580 |
| ODDO BHF ASSET MANAGEMENT SAS | PARIS, I0 | $19.8M | 1,166,388 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $19.2M | 1,131,127 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | BOSTON, MA | $17.9M | 1,054,360 |
| [Minerva Advisors LLC](https://search.stillhousedata.com/firm/161408) | BALA CYNWYD, PA | $17.5M | 1,029,703 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $13.0M | 1.59% |
| GDL Fund | GDL Fund | $5.3M | 462.50% |
| [PGIM Jennison Small Company Fund](https://search.stillhousedata.com/fund/S000004629) | Prudential Jennison Small Co Fund, Inc. | $2.7M | 8.37% |
| [The Gabelli ABC Fund](https://search.stillhousedata.com/fund/S000001070) | Gabelli Investor Funds Inc | $2.2M | 53.11% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $1.8M | 3.79% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $636K | 0.11% |
| [Enterprise Mergers and Acquisitions Fund](https://search.stillhousedata.com/fund/S000017793) | Gabelli 787 Fund, Inc. | $510K | 89.52% |
| [WALTHAUSEN SMALL CAP VALUE FUND](https://search.stillhousedata.com/fund/S000020728) | Walthausen Funds | $483K | 116.79% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $453K | 0.15% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $199K | 0.55% |
| [Comstock Capital Value Fund](https://search.stillhousedata.com/fund/S000001057) | Comstock Funds, Inc. | $170K | 165.46% |
| [DWS Small Cap Index VIP](https://search.stillhousedata.com/fund/S000006223) | DEUTSCHE DWS INVESTMENTS VIT FUNDS | $157K | 3.75% |
| [Vericimetry U.S. Small Cap Value Fund](https://search.stillhousedata.com/fund/S000033942) | VERICIMETRY FUNDS | $156K | 9.31% |
| [TIAA Separate Account VA-1 - Stock Index Account](https://search.stillhousedata.com/fund/S000005098) | TIAA Separate Account VA-1 | $6K | 0.05% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/390607109.md)
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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.