Oklo and NuScale Power have reached various regulatory milestones, but neither company has exited the pre-revenue stage.
Both stocks trade at valuations that price in future growth as a near certainty.
Even if you're bullish on this trend, consider waiting for more favorable entry points before buying either stock.
Oklo (NYSE: OKLO) and NuScale Power (NYSE: SMR) remain two of the most popular nuclear energy stocks. However, there's a good reason why excitement about both companies has waned in the past year. Neither company has made much progress exiting the pre-revenue stage.
Oklo continues to announce major progress with its various projects. For instance, over the past month, the company has entered the testing stage for its Groves Isotope Test Reactor in Texas. Last month, the company announced progress on its Aurora project in southern Illinois by signing a nuclear fuel supply deal.
Missed Nvidia in 2009? This Rare Signal Is Flashing Again. In 2009, a "Double Down" signal flashed for a little-known chipmaker called Nvidia. For the first time in years, that same "Total Conviction" signal is flashing for a company 1/100th the size of Nvidia. Continue »
Still, commercialization remains years away. Analyst estimates call for revenue of just $1.1 million this year and $5.7 million in 2027. Compare that to Oklo's nearly $7 billion market cap, which seemingly bakes in future potential as a near certainty.
Oklo is also burning through hundreds of millions in cash each quarter, leaning on dilutive equity raises to shore up its balance sheet. After raising $1.2 billion from the sale of newly issued shares earlier this year, it could tap this funding source again.
Image source: Getty Images.
NuScale Power specializes in developing small modular reactors (SMRs). In 2024 and 2025, investors were very bullish on this nuclear technology start-up, given the potential of its SMRs to provide a scalable source of clean energy for artificial intelligence (AI) data centers.
Flash forward to now, however, and NuScale has fallen out of favor. While Oklo shares are down over 47.5% in the past year, NuScale has tumbled by nearly 84%. While NuScale already has Nuclear Regulatory Commission (NRC) approval to build SMRs, commercialization also appears, at best, to be many years away.
Most proposed commercial uses of NuScale's SMR technology remain in the negotiation stage. However, with a $3 billion market cap, investors have to pay up today for potential growth tomorrow. NuScale faces similar cash burn and dilution risks as Oklo.
Put simply, with advanced nuclear technology years away from the payoff stage, there's no rush to buy either Oklo or NuScale.
Before you buy stock in NuScale Power, consider this:
The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and NuScale Power wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years.
Consider when Netflix made this list on December 17, 2004... if you invested $1,000 at the time of our recommendation, you’d have $397,081!* Or when Nvidia made this list on April 15, 2005... if you invested $1,000 at the time of our recommendation, you’d have $1,166,221!*
Now, it’s worth noting Stock Advisor’s total average return is 889% — a market-crushing outperformance compared to 203% for the S&P 500. Don't miss the latest top 10 list, available with Stock Advisor, and join an investing community built by individual investors for individual investors.
See the 10 stocks »
*Stock Advisor returns as of July 30, 2026.
Thomas Niel has no position in any of the stocks mentioned. The Motley Fool recommends NuScale Power. The Motley Fool has a disclosure policy.