11 Fastest Growing Small Cap Stocks to Buy

8. Power Solutions International, Inc. (NASDAQ:PSIX)

Quarterly Revenue Growth (yoy): 73.50% 

Upside Potential as of September 01, 2025: 53.22%

EntryPoint Capital LLC has expanded its holdings in Power Solutions International, Inc. (NASDAQ:PSIX) in the first quarter by acquiring 8,119 shares at a value of $205,000, signaling increased confidence in the company’s outlook.

Recently, Power Solutions International, Inc. (NASDAQ:PSIX) delivered strong results, reporting approximately 74% revenue growth driven by its data center-oriented power systems, which comprise 82% of operations. That’s not it – the power segment is expected to grow even further.

Another reason investors are drawn to Power Solutions International, Inc. (NASDAQ:PSIX) is its financial discipline. The recent efforts towards debt reduction and extended credit lines not only strengthen the company’s liquidity but also offer enhanced strategic flexibility.

Power Solutions International, Inc. (NASDAQ:PSIX) is an Illinois-based company that provides engines and power systems globally. The core offerings of the company include engine blocks, packaged power systems, and electrical power generation systems. Founded in 1985, the company is a subsidiary of Weichai America Corp.