Shares of Power Solutions International, Inc. (PSIX) are surging 9.91% in pre-market trading following the company's impressive first-quarter 2025 financial results. The engine manufacturer reported earnings that significantly surpassed analyst expectations, demonstrating strong growth and financial performance.

Power Solutions International announced quarterly adjusted earnings of $0.83 per share, nearly doubling the lone analyst forecast of $0.46 per share. This represents a substantial 167.74% increase compared to the $0.31 per share reported in the same quarter last year. The company's revenue also showed remarkable growth, rising 42.2% year-over-year to $135.45 million, well above the analyst expectation of $106.60 million.

The strong financial results were driven by robust sales growth across the company's product lines. While Power Solutions International has not provided specific sales growth guidance for 2025, they have indicated an anticipation of increased sales compared to 2024. The company's ability to outperform expectations and deliver significant year-over-year growth has clearly resonated with investors, as reflected in the pre-market stock price surge. As the market opens, all eyes will be on PSIX to see if this momentum continues throughout the trading session.