Clean Harbors Executive Chairman Alan McKim Sells 1,343 Shares for Tax Liability

Alan S. McKim, Executive Chairman and CTO of Clean Harbors Inc, filed a Form 4 disclosing the sale of 1,343 shares of common stock on July 1, 2026, at $290.74 per share. The transaction was coded as "F" and involved payment of tax liability by withholding securities incident to vesting, in accordance with Rule 16b-3. Following the sale, McKim directly holds 31,419 shares. The filing also reveals McKim's indirect holdings through various trusts: 100,000 shares through the McKim 2026 Annuity Trust, 67,093 shares through the McKim 2025 Annuity Trust, and 2,065,368 shares through the McKim 2007 Trust. The total indirect holdings amount to 2,232,461 shares, making McKim a significant shareholder in the company despite the relatively small sale for tax purposes.