Nuclear’s AI Moment Is Here — There Is Only 1 Play for the 4X Data Center Demand Explosion

Constellation Energy (CEG) operates 21 nuclear reactors—the largest U.S. fleet—and generated $25.5B in 2025 revenue with $2.32B in net income while signing long-term contracts with data-center operators. Three pure-play nuclear developers—Oklo (OKLO), NuScale Power (SMR), and Nano Nuclear Energy (NNE)—have each lost 57% to 78% from their October peaks despite holding promising small-modular-reactor designs because they remain pre-revenue or loss-making with first commercial operation years away.

AI data centers will quadruple power demand to 1,600 terawatt-hours by 2034, but construction timelines for new nuclear facilities won’t deliver meaningful supply until the late 2020s or early 2030s, making Constellation the only stock offering immediate profitable exposure to the nuclear renaissance.

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BloombergNEF’s latest forecast paints a clear picture of AI's inexorable force: global data center power demand will quadruple over the next decade, driven by AI data center training and inference that run nonstop. Energy needs will climb from roughly 400 terawatt-hours in 2024 to more than 1,600 terawatt-hours by 2034, with the U.S. consuming the largest share.

Existing grids cannot absorb that jump alone. Nuclear power stands out as the leading source that delivers constant, carbon-free baseload exactly when AI needs it most. Investor excitement sent several pure-play nuclear names soaring last fall. Six months later, though, that ardor has cooled.

Nuclear Energy Will Be Critical -- Eventually

Nuclear can supply the cheap, reliable power AI data centers require. President Trump’s executive orders directed the Nuclear Regulatory Commission to streamline approvals, and the Department of Energy has selected companies for pilot fuel projects. Demonstration reactors are in the works.

Yet building commercial-scale facilities still takes years. Regulatory reviews, supply-chain hurdles, and construction timelines mean most next-generation projects won’t deliver meaningful power before the late 2020s or early 2030s. In short, the demand surge will arrive far sooner than the new supply. That gap explains why shares of three high-profile nuclear developers have dropped sharply from their October peaks, even as the long-term case remains intact.

Three Nuclear Upstarts Losing Steam

Let’s look at the numbers for the three stocks that initially captured the spotlight.

Oklo (NYSE:OKLO) reported zero revenue for full-year 2025 and posted an operating loss of $139.3 million. Net losses came to $105.7 million. The company burned $82.2 million in operating cash. As of today, Oklo shares have fallen about 65% from their October high near $194.

NuScale Power (NYSE:SMR) generated just $31.5 million in revenue last year -- down from $37 million the year before -- and recorded a net loss of $355.8 million. The stock now trades roughly 78% below last October’s peak of $53.43.

Similarly, Nano Nuclear Energy (NASDAQ:NNE) remains pre-revenue and reported a first-quarter 2026 net loss of $6.52 million. Shares have declined about 57% from their 52-week high near $60.87.

Granted, all three hold promising small-modular-reactor designs and have secured early partnerships. That said, none has demonstrated commercial-scale operation. Losses continue, dilution risks remain, and first revenue sits years out. Smart investors see the technology’s potential but recognize the execution timeline does not match the AI demand curve.

There Is 1 Stock Delivering Nuclear Power Today

Contrast that with Constellation Energy (NYSE:CEG), the established utility operator already generating power and profit. The company runs 21 nuclear reactors across 12 sites -- the largest fleet in the U.S. -- and posted $25.5 billion in 2025 revenue, up 8.3% year-over-year. It's also profitable, with net income of $2.32 billion, or $7.40 per share, though that is down 38% from the year-ago period.

Last month, Constellation issued 2026 adjusted operating earnings guidance of $11.00 to $12.00 per share and raised its share-buyback authorization to $5 billion while earmarking $3.9 billion for growth capital expenditures.

Constellation is not waiting for future reactors. It is expanding capacity at existing plants, signing long-term contracts with data-center operators, and delivering 24/7 power today at capacity factors that routinely exceed 90%. When all is said and done, it offers the rare combination of proven operations, real earnings, and direct exposure to the nuclear renaissance without the startup risks.

Key Takeaway

AI data centers will need four times the power they use today. Nuclear is part of the answer, but only one stock gives retail investors immediate, profitable access to that solution. Constellation Energy is the clear buy.

Oklo, NuScale Power, and Nano Nuclear Energy, while exciting on paper, still face years of losses and construction delays -- making them stocks to avoid until they prove they can operate at scale. Focus on the operator already delivering reliable power and steady cash flow. That is the data-rich way to play the nuclear tailwind without betting on unproven timelines.

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