Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in GLDD held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 5.9M | $100.6M | -14.2% | 8.861% | 0.00% |
| 2 | DIMENSIONAL FUND ADVISORS LP | 3.4M | $57.6M | -21.3% | 5.071% | 0.01% |
| 3 | AMERICAN CENTURY COMPANIES INC | 3.0M | $51.1M | +16.3% | 4.502% | 0.03% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 2.9M | $48.6M | β | 4.277% | 0.00% |
| 5 | FIL Ltd | 2.7M | $45.4M | β | 4.000% | 0.04% |
| 6 | TWO SIGMA INVESTMENTS, LP | 2.0M | $33.8M | +248.6% | 2.979% | 0.03% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 1.7M | $28.5M | +2.9% | 2.513% | 0.00% |
| 8 | BALYASNY ASSET MANAGEMENT LLC | 1.6M | $27.7M | β | 2.436% | 0.09% |
| 9 | STATE STREET CORP | 1.6M | $26.8M | -0.7% | 2.362% | 0.00% |
| 10 | Qube Research & Technologies Ltd | 1.4M | $23.5M | +119.6% | 2.072% | 0.03% |
| 11 | WATER ISLAND CAPITAL LLC | 1.3M | $21.5M | β | 1.892% | 2.86% |
| 12 | ODDO BHF ASSET MANAGEMENT SAS | 1.2M | $19.8M | β | 1.747% | 0.78% |
| 13 | MILLENNIUM MANAGEMENT LLC | 1.1M | $19.2M | -29.2% | 1.694% | 0.01% |
| 14 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.1M | $17.9M | +32.4% | 1.579% | 0.01% |
| 15 | Minerva Advisors LLC | 1.0M | $17.5M | -25.9% | 1.542% | 11.30% |
| 16 | JENNISON ASSOCIATES LLC | 1.0M | $17.5M | -73.0% | 1.541% | 0.01% |
| 17 | Beryl Capital Management LLC | 913K | $15.5M | β | 1.367% | 14.28% |
| 18 | Sand Grove Capital Management LLP | 893K | $15.2M | β | 1.337% | 3.55% |
| 19 | OMERS ADMINISTRATION Corp | 864K | $14.7M | β | 1.294% | 0.09% |
| 20 | GOLDMAN SACHS GROUP INC | 859K | $14.6M | +35.3% | 1.286% | 0.00% |
| 21 | CNH PARTNERS LLC | 731K | $12.4M | β | 1.094% | 0.20% |
| 22 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 731K | $12.4M | +510.6% | 1.094% | 0.00% |
| 23 | NORTHERN TRUST CORP | 669K | $11.4M | +5.1% | 1.002% | 0.00% |
| 24 | TIG Advisors, LLC | 643K | $10.9M | β | 0.963% | 0.56% |
| 25 | Harvey Partners, LLC | 610K | $10.4M | -83.5% | 0.913% | 0.84% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in GLDD β a direct measure of their conviction.
Filings activity in GLDD during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new GLDD position in Q1 2026
Institutions that fully closed their GLDD position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 180 | 18% | 77.65% | +13.58 pp | $881M | +21% |
| Q4 2025 | 220 | +6.3% | 64.07% | +7.48 pp | $727M | +13% |
| Q3 2025 | 207 | +10% | 56.59% | 0.56 pp | $642M | 1.0% |
| Q2 2025 | 188 | 1.1% | 57.15% | +15.82 pp | $649M | +38% |
| Q1 2025 | 190 | 2.1% | 41.33% | 12.19 pp | $469M | 23% |
| Q4 2024 | 194 | +9.6% | 53.52% | +4.68 pp | $608M | +9.6% |
| Q3 2024 | 177 | +6.6% | 48.84% | +8.14 pp | $554M | +20% |
| Q2 2024 | 166 | β | 40.70% | β | $462M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying GLDD stock.
Based on Q1 2026 13F filings, institutional ownership of Great Lakes Dredge & Dock Corporation stands at 77.6%, held across 180 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of GLDD, with approximately 5,917,589 shares worth $0.10B as of Q1 2026.
Yes β 3 widely-followed marquee investors appear among the top 25 institutional holders of GLDD, including TWO SIGMA INVESTMENTS, LP, MILLENNIUM MANAGEMENT LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for GLDD is 59 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
56 institutions opened new positions in GLDD during Q1 2026, while 96 fully exited. 83 added to existing positions and 40 trimmed.
GLDD institutional ownership rose by 13.58 percentage points quarter-over-quarter, with a net change of -40 holders.
The top 10 institutions account for 50.3% of all reported 13F value in GLDD, and the top 25 account for 76.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.