GREAT LAKES DREDGE & DOCK CO (GLDD) Stock Institutional Trading Activity


GREAT LAKES DREDGE & DOCK CO (GLDD) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC and Sequoia Financial Advisors. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2019Renaissance Technologies LLCBuy383,100672,500$5,992
Q4 2018Renaissance Technologies LLCBuy171,200289,400$1,916
Q3 2018Renaissance Technologies LLCBuy76,100118,200$733
Q1 2018Renaissance Technologies LLCSell-35,10042,100$194
Q4 2017Renaissance Technologies LLCSell-2,06377,200$417
Q4 2016Renaissance Technologies LLCBuy25,06379,263$333
Q3 2016Renaissance Technologies LLCBuy26,50054,200$190
Q2 2016Renaissance Technologies LLCSell-180,20027,700$121
Q1 2015Renaissance Technologies LLCBuy12,800207,900$1,249
Q4 2014Renaissance Technologies LLCBuy50,700195,100$1,670
Q3 2014Renaissance Technologies LLCBuy127,100144,400$892
Q2 2014Renaissance Technologies LLCBuy17,30017,300$138

Frequently asked questions about GLDD activity

  • Which institutional owners are buying GLDD?

    Institutional owners buying GLDD include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in GLDD activity?

    "Buy" means an investor increased their reported position in GLDD compared to the prior reporting period. This reflects growing exposure to GREAT LAKES DREDGE & DOCK CO (GLDD) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in GLDD increasing?

    Institutional interest in GLDD can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.