Hallador Energy Company (HNRG) saw its stock price surge 27.43% in after-hours trading on Monday, following the release of its third-quarter 2025 financial results that significantly exceeded analyst expectations. The coal producer and power generator reported robust growth across all key financial metrics, driven by favorable market conditions and operational efficiency.

The company's Q3 revenue jumped 40% year-over-year to $146.8 million, considerably surpassing the consensus estimate of $110 million. Net income skyrocketed to $23.9 million, compared to just $1.6 million in the same period last year. Adjusted EBITDA also impressed, rising 1.6 times year-over-year to $24.9 million, beating the analyst estimate of $13 million. Earnings per share came in at $0.55, reflecting the strong bottom-line performance.

Adding to the positive sentiment, Hallador announced it had filed an ERAS application for a 525MW gas generation expansion at its Merom site, targeting completion in Q4 2028. The company cited accelerating demand for accredited capacity, particularly from data centers, as a key driver for this expansion. With a solid forward sales position of $921.7 million through 2029 and improving market conditions, investors appear optimistic about Hallador's growth prospects and financial stability.