Shares of NET Power (NYSE: NPWR) tumbled 8.81% in Thursday's trading session following the release of the company's disappointing third-quarter 2025 financial results. The significant downturn came as investors reacted to a substantial loss that far exceeded analyst expectations.

NET Power reported a staggering loss of $5.28 per diluted share for the third quarter, a dramatic reversal from the $0.01 profit per share recorded in the same period last year. This result shocked the market, as it was significantly worse than the FactSet consensus estimate of a $0.16 loss per share. Adding to investors' concerns, the company failed to report any revenue for the quarter, raising questions about its operational performance and future prospects.

The magnitude of the earnings miss appears to be the primary driver behind the stock's sharp decline. NET Power's inability to generate revenue in the quarter, coupled with the unexpectedly large loss, has likely prompted investors to reassess the company's near-term outlook and growth potential. As the market digests this information, traders will be closely watching for any additional updates or guidance from the company regarding its path to profitability and strategies to address the challenges revealed in this earnings report.