11 Best Performing Mid Cap Stocks So Far In 2025

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4. Oklo Inc. (NYSE:OKLO)

Number of Hedge Fund Holders: 23

Market Capitalization as of July 16: $8.91 billion 

Year-to-Date Performance as of July 16: 187.09%

Oklo Inc. (NYSE:OKLO) is one of the best performing mid cap stocks so far in 2025. On July 15, Oklo announced that it has chosen Kiewit Nuclear Solutions Co. as the lead constructor for its first commercial Aurora powerhouse. This facility will be located in Idaho, specifically at the Idaho National Laboratory/INL.

Under a newly signed Master Services Agreement, Kiewit Nuclear Solutions Co., which is a subsidiary of Kiewit Corporation (one of North America’s largest construction and engineering organizations), will begin supporting the design, procurement, and construction of the Aurora-INL. Pre-construction activities are slated to commence in 2025, with commercial operations targeted for late 2027 to early 2028.

A portion of the Aurora powerhouse’s construction scope is non-nuclear, which allows Oklo to use Kiewit’s experience in large-scale industrial and infrastructure projects. Oklo is well-positioned for near-term deployment, possessing a US Department of Energy-approved site, secured fuel, and demonstrated regulatory progress.

Oklo Inc. (NYSE:OKLO) develops advanced fission power plants to provide clean, reliable, and affordable energy at scale to customers in the US.

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