Shares of Hallador Energy (HNRG) plummeted 8.95% in intraday trading on Monday, following the release of the company's second-quarter 2025 financial results. The significant drop suggests that investors were underwhelmed by the company's performance.

According to the financial report, Hallador Energy posted revenue of $60 million for the second quarter. The company reported a net income of $8.2 million and adjusted EBITDA of $3.4 million. Additionally, the adjusted free cash flow stood at $11.4 million for the quarter.

While the company managed to remain profitable, the market reaction indicates that these figures may have fallen short of investor expectations. The relatively low adjusted EBITDA of $3.4 million, compared to the revenue of $60 million, could be a particular point of concern for investors, potentially signaling operational inefficiencies or increased costs. The stark contrast between the stock's performance and the reported profits suggests that the market may have anticipated stronger results or that there might be underlying concerns about the company's future prospects in the energy sector.