Summary
Alan S. McKim, who serves as Executive Chairman and chief technology officer of Clean Harbors Inc (NYSE: CLH), executed a sale of 100,000 common shares on March 4, 2026, at $292.65 per share, generating proceeds of $29.26 million. The transaction occurred as the company's shares were trading close to a 52-week high of $298.12 and after a year that produced a roughly 45% total return for investors.
Transaction details and ownership post-sale
Following the disposition, McKim's reported holdings include indirect stakes of 2,065,368 shares via the McKim 2007 Trust, 67,093 shares via the McKim 2025 Annuity Trust and 100,000 shares via the McKim 2026 Annuity Trust, in addition to a direct holding of 34,027 shares. The company carries a market value of about $15.25 billion and was trading at a price-to-earnings ratio of 39.84 at the time of the report. An analysis cited from InvestingPro notes that CLH appears overvalued at current levels, with more detailed commentary available through that platform's Pro Research Report.
Recent operating performance and analyst reactions
Clean Harbors posted fourth-quarter results for fiscal 2025 that exceeded consensus expectations on both revenue and adjusted EBITDA. Management reported its strongest quarterly revenue growth of the year, driven primarily by continued strength in the company's Environmental Services segment. In response to the quarter, several sell-side analysts raised their price targets: Needham to $308, Oppenheimer to $300, BMO Capital to $310 and TD Cowen to $320, the latter noting the company's merger-and-acquisition potential as a factor for the higher target.
Planned acquisition
In a separate corporate development, Clean Harbors agreed to buy Depot Connect International's Industrial and Rail Services business for approximately $130 million. The deal covers locations in Ohio, Louisiana and Texas and is expected to close in the first half of 2026 subject to customary closing conditions.
Context and market indicators
The timing of McKim's sale - near a 52-week high and after a quarter that outperformed estimates - will likely be noted by investors tracking insider activity and valuation metrics. The company’s stated valuation multiples and the InvestingPro assessment that CLH appears overvalued are factual data points included in the record. The announced acquisition and analyst target increases reflect continued focus on growth through both organic performance in Environmental Services and strategic transactions in Industrial and Rail Services.
Key points
- Executive Chairman and CTO Alan S. McKim sold 100,000 Clean Harbors shares on March 4, 2026, at $292.65 per share, totaling $29.26 million.
- Clean Harbors reported stronger-than-expected fourth-quarter 2025 revenue and adjusted EBITDA, with Environmental Services driving the company’s best quarterly revenue growth of the year; multiple analysts raised price targets afterward.
- The company agreed to acquire Depot Connect International's Industrial and Rail Services operations for about $130 million, with the transaction expected to close in H1 2026 subject to customary conditions.
Risks and uncertainties
- Valuation concerns: InvestingPro analysis cited in the public record indicates CLH appears overvalued at current price levels, which could affect investor sentiment and market performance.
- Deal completion risk: The Depot Connect International transaction is subject to customary closing conditions and is expected to close in the first half of 2026 - its completion is not guaranteed.
- Market reaction to insider selling: While executive sales can be routine, the timing of McKim's sale near a 52-week high may introduce short-term uncertainty in market perception for the stock.
Bottom line
The reported insider sale by Alan S. McKim is a notable transaction given its size and timing, but it sits alongside tangible operational developments for Clean Harbors: better-than-expected quarterly results, multiple analyst target raises, and a planned acquisition aimed at expanding Industrial and Rail Services. Observers and market participants will weigh these near-term catalysts against valuation signals highlighted by third-party analysis.