Shares of Clean Harbors (CLH) plummeted 6.39% in pre-market trading on Wednesday following the release of its second-quarter 2025 financial results that fell short of analysts' expectations. The environmental and industrial services provider reported earnings per share (EPS) of $2.36, missing the estimated $2.41, while revenue came in at $1.550 billion, below the anticipated $1.593 billion.

The company's Q2 performance showed a year-over-year decline, with EPS dropping from $2.46 in the same quarter last year. Revenue remained flat at $1.55 billion compared to the previous year, indicating stagnant growth. Despite these disappointing results, Clean Harbors maintained its full-year 2025 guidance for Adjusted EBITDA and Adjusted Free Cash Flow, projecting Adjusted EBITDA in the range of $1.16 billion to $1.20 billion, representing a 6% year-over-year growth.

Looking ahead, Clean Harbors expects its third-quarter 2025 Adjusted EBITDA to grow by 9-12% compared to the same period last year. However, this positive outlook was not enough to offset investor concerns about the company's current performance, leading to the significant stock price decline. The market's reaction highlights the importance of meeting or exceeding quarterly expectations in maintaining investor confidence.