GREAT LAKES DREDGE & DOCK CO (GLDD) Top Institutional Shareholders
GREAT LAKES DREDGE & DOCK CO (GLDD) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $6.49M in GLDD holdings during the latest filing period.
Renaissance Technologies LLC is currently the largest disclosed institutional shareholder of GLDD tracked by InsiderSet, reporting ownership valued at approximately $6.49M in its March 31, 2026 SEC Form 13F filing.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed GLDD value among the investors covered in this analysis. Major shareholders include Renaissance Technologies LLC, and several other long-term asset managers with concentrated positions in GREAT LAKES DREDGE & DOCK CO (GLDD).
This page ranks the largest institutional GLDD shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Renaissance Technologies LLC | Jim Simons | 0.01% | 381,700 | $6,488,900 | — | — | — |
Frequently asked questions about GLDD
Who owns the most GLDD stock?
The largest holders of GLDD are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for GREAT LAKES DREDGE & DOCK CO (GLDD).
Is GLDD widely held by superinvestors?
Many widely followed stocks like GLDD appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly GLDD is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.