Clean Harbors CTO Sells $28.1 Million in Stock Amidst 52-Week Highs
CLH sits 58% above its 52-week low of $178.29 on light trading volume (0.4× avg).
Summary
Alan S. McKim, Executive Chair and CTO of Clean Harbors, reported an open market sale of 100,000 shares totaling $28.1 million, alongside a gift of 10,000 shares.
Key Events · Ownership and Investor Activity · CLH
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Executive Chair & CTO Sells Shares
Alan S. McKim, the Executive Chair and CTO, disposed of 100,000 shares of common stock in an open market transaction on February 19, 2026, generating proceeds of $28,114,000.
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Charitable Gift Reported
Concurrently, Mr. McKim also reported a gift of 10,000 shares of common stock on the same date.
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Stock Trading Near 52-Week High
This significant insider sale occurs while Clean Harbors' stock is trading near its 52-week high of $288.81, potentially indicating profit-taking.
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Follows Prior Intent to Sell
This Form 4 reports the actual sale following a Form 144 filed on February 19, 2026, which indicated an officer's intent to sell approximately $30.5 million worth of common stock.
Analysis · CLH · Energy & Transportation
The sale of over $28 million in common stock by Alan S. McKim, the Executive Chair and CTO, represents a significant insider disposition. This transaction occurs while Clean Harbors' stock is trading near its 52-week high, potentially indicating profit-taking. While the company recently announced a $350 million share buyback program, this substantial sale by a key executive could be interpreted as a signal of reduced personal conviction. Investors should note this material insider selling event.
How filings like this one have moved
In the 30 days to Oct 4, 2026, 29.1% of the 1568 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.60%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, CLH was trading at $281.37 on NYSE in the Energy & Transportation sector, with a market capitalization of approximately $14.9B. The 52-week trading range was $178.29 to $288.81. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.