CECO ENVIRONMENTAL CORP (CECO) Stock Institutional Trading Activity


CECO ENVIRONMENTAL CORP (CECO) 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 Polen Capital Management, First Eagle U.S. Value, Renaissance Technologies LLC, and Olstein Capital Management. 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
Q4 2018Renaissance Technologies LLCBuy33,600126,400$853
Q3 2018Renaissance Technologies LLCSell-6,40092,800$731
Q1 2018Renaissance Technologies LLCSell-55,40099,200$441
Q4 2017Renaissance Technologies LLCSell-13,700154,600$793
Q3 2017Renaissance Technologies LLCSell-78,683168,300$1,424
Q2 2017Renaissance Technologies LLCSell-118,000246,983$2,267
Q2 2017Olstein Capital ManagementBuy18,900394,750$3,624
Q1 2017Renaissance Technologies LLCBuy74,800364,983$3,836
Q1 2017Olstein Capital ManagementBuy92,281375,850$3,950
Q4 2016Olstein Capital ManagementSell-124,781283,569$3,956
Q4 2016Renaissance Technologies LLCBuy117,800290,183$4,048
Q3 2016Renaissance Technologies LLCBuy133,700172,383$1,944
Q3 2016Olstein Capital ManagementSell-203,745408,350$4,606
Q2 2016Renaissance Technologies LLCSell-107,70038,683$338
Q2 2016Olstein Capital ManagementSell-98,905612,095$5,350
Q1 2016Renaissance Technologies LLCBuy62,260146,383$909
Q1 2016Olstein Capital ManagementBuy121,000711,000$4,415
Q4 2015Renaissance Technologies LLCBuy50,98384,123$646
Q4 2015Olstein Capital ManagementBuy85,000590,000$4,531
Q3 2015Renaissance Technologies LLCSell-20,78733,140$271
Q3 2015Olstein Capital ManagementBuy63,000505,000$4,136
Q2 2015Renaissance Technologies LLCSell-19,12053,927$611
Q2 2015Olstein Capital ManagementBuy42,000442,000$5,008
Q1 2015Renaissance Technologies LLCBuy53,45473,047$775
Q1 2015Olstein Capital ManagementBuy207,000400,000$4,244
Q4 2014Olstein Capital ManagementBuy40,000193,000$2,999
Q3 2014Olstein Capital ManagementBuy26,000153,000$2,050
Q2 2014Renaissance Technologies LLCSell-40,16119,593$305
Q2 2014Olstein Capital ManagementBuy50,000127,000$1,980
Q1 2014Renaissance Technologies LLCSell-146,14759,754$991

Frequently asked questions about CECO activity

  • Which institutional owners are buying CECO?

    Institutional owners buying CECO 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 CECO activity?

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

  • Is institutional interest in CECO increasing?

    Institutional interest in CECO 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.