MCKIM ALAN S 4

What Happened

• Alan S. McKim, Executive Chair, CTO and Director of Clean Harbors, sold 100,000 shares in an open-market transaction on Feb 19, 2026 at $281.14 per share, generating proceeds of $28,114,000. The filing also reports a separate 10,000-share disposition marked as a gift (charitable donation).

Key Details

• Transaction date: 2026-02-19
• Sale: 100,000 shares @ $281.14 — proceeds $28,114,000
• Gift: 10,000 shares @ $0.00 (footnote F1: Charitable Gift)
• Filing date (Form 4): 2026-02-23 (within the normal SEC reporting window)
• Shares owned after transaction: not specified in the provided filing excerpt
• No 10b5-1 plan, tax-withholding, or other derivative activity noted in the provided footnotes

Context

• This was a straight sale (liquidity event) plus a charitable gift; gifts are non-market-sentiment transactions and do not necessarily reflect the insider’s view of the company’s prospects. Sales are common among insiders for diversification or personal needs; purchases generally carry stronger signals for investors.