CLEAN HARBORS INC (CLH) Stock Institutional Trading Activity


CLEAN HARBORS INC (CLH) 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 Lone Pine Capital, Durable Capital Partners, Renaissance Technologies LLC, Turtle Creek Asset Management, and Third Avenue 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 2014Renaissance Technologies LLCBuy169,500213,502$10,259
Q4 2014Turtle Creek Asset ManagementBuy225,844283,644$13,629
Q3 2014Third Avenue ManagementBuy114,083114,083$6,151
Q3 2014Renaissance Technologies LLCBuy36,70044,002$2,373
Q3 2014Turtle Creek Asset ManagementBuy57,80057,800$3,117
Q2 2014Renaissance Technologies LLCSell-147,1007,302$469
Q3 2013Renaissance Technologies LLCSell-7,400154,402$9,057
Q2 2013Renaissance Technologies LLCBuy161,802161,802$8,176

Frequently asked questions about CLH activity

  • Which institutional owners are buying CLH?

    Institutional owners buying CLH 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 CLH activity?

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

  • Is institutional interest in CLH increasing?

    Institutional interest in CLH 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.