Shares of Hallador Energy Company (HNRG) surged 15.69% in after-hours trading on Monday following the release of its impressive third-quarter 2025 financial results and announcement of expansion plans. The coal producer and power generator significantly outperformed analysts' expectations, demonstrating robust growth across key financial metrics.

Hallador reported total revenue of $146.8 million for Q3, marking a 40% increase year-over-year and substantially beating the analyst estimate of $110 million. The company's net income soared to $23.9 million, or $0.55 per share, up from $1.6 million in the same period last year. This earnings result significantly exceeded the FactSet consensus estimate of $0.08 per share. Adjusted EBITDA also saw a remarkable 1.6-fold increase to $24.9 million, surpassing the analyst consensus of $13 million.

Adding to investor enthusiasm, Hallador announced it had filed an ERAS (Expedited Resource Addition Study) application for a 525MW gas generation expansion at its Merom site, targeting completion in the fourth quarter of 2028. The company cited accelerating demand for accredited capacity, particularly from data centers and load-serving entities seeking dispatchable energy, 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.