

The Russell 2000 (^RUT) is home to many small-cap stocks, offering investors the chance to uncover hidden gems before the broader market catches on. However, these companies often come with higher volatility and risk, as their smaller size makes them more vulnerable to economic downturns.
Picking the right small caps isn’t easy, and that’s exactly why StockStory exists - to help you focus on the best opportunities. Keeping that in mind, here is one Russell 2000 stock that could be a breakout winner and two that may struggle to keep up.
Market Cap: $617.4 million
Founded to protect a tree-lined two-lane road, Onterris (NYSE:ONT) provides air quality monitoring, environmental laboratory testing, compliance, and environmental consulting services.
Why Does ONT Worry Us?
Onterris’s stock price of $17.58 implies a valuation ratio of 12.1x forward P/E. Dive into our free research report to see why there are better opportunities than ONT.
Market Cap: $1.19 billion
Headquartered in NYC, Genco (NYSE:GNK) is a shipping company that transports dry bulk cargo along worldwide maritime routes.
Why Do We Avoid GNK?
Genco is trading at $27.28 per share, or 11.7x forward P/E. To fully understand why you should be careful with GNK, check out our full research report (it’s free).
Market Cap: $4.07 billion
Pioneering the shift from bulky, short-term heart monitors to sleek, wire-free patches, iRhythm Technologies (NASDAQ:IRTC) provides wearable cardiac monitoring devices and AI-powered analysis services that help physicians detect and diagnose heart rhythm disorders.
Why Is IRTC on Our Radar?
At $123.39 per share, iRhythm trades at 186.9x forward P/E. Is now the time to initiate a position? See for yourself in our comprehensive research report, it’s free.
ONE MORE THING: Top 5 Growth Stocks. The biggest stock winners almost always had one thing in common before they ran. Revenue growing like crazy. Meta. CrowdStrike. Broadcom. Our AI flagged all three. They returned 315%, 314%, and 455%, respectively.
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Stocks that made our list in 2020 include now familiar names such as Nvidia (+1,460% between June 2020 and June 2025) as well as under-the-radar businesses like the once-micro-cap company Kadant (+214% between June 2020 and June 2025). Find your next big winner with StockStory today.