Clean Harbors CFO Eric J. Dugas Sells 447 Shares for Tax Withholding

This Form 4 filing reports that Eric J. Dugas, Executive Vice President and Chief Financial Officer of Clean Harbors Inc., sold 447 shares of common stock on July 1, 2026. The transaction was coded as "F" (Payment of exercise price or tax liability by delivery or withholding of securities incident to receipt, exercise or vesting of a security) and involved a disposition of shares at $290.74 per share. According to footnote F1, this was a payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b-3. Following this transaction, Dugas holds 13,532 shares of Clean Harbors common stock. The filing was signed on July 6, 2026, and reflects a routine tax withholding transaction related to equity compensation vesting.