Form 4 Filing for Clean Harbors Inc.

George L. Curtis, Executive Vice President of Clean Harbors Inc., reported transactions on March 13, 2026. He disposed of 350 shares of Common Stock with a per-share price of $288.93, totaling $101,125.50, to cover tax liabilities upon vesting. Additionally, 1028 shares of Common Stock were forfeited due to unachieved performance targets under the Long Term Equity Incentive Program. Following these transactions, Mr. Curtis owns 46,048 shares of Clean Harbors Inc. common stock.