Oklo stock crashes 75% despite Altman backing; nuclear reactor still unapproved

Oklo is a nuclear energy start-up pursuing a bold strategy to power the world's most energy-intensive artificial intelligence data centers. Rather than relying on the traditional electric grid, Oklo designs small modular reactors that can be deployed directly at or near data center facilities, eliminating the need to route power through residential grids and potentially avoiding the electricity bill spikes that have concerned consumers and regulators as AI deployment accelerates.

The company has attracted major backing, including hundreds of millions of dollars from Sam Altman, the CEO of OpenAI. In 2025, Oklo's stock went on what the article calls "a miracle run" driven by bullish sentiment around AI energy needs, reaching a market cap of around $25 billion（約4兆円）. This enthusiasm has proven short-lived: shares are now down 75% in less than a year, leaving the company with a market cap of $7.6 billion（約1.2兆円）.

Oklo's business model hinges on long-term contracts with data center operators. Meta Platforms has signed what the article describes as a large agreement, positioning Oklo to generate "reliable revenue in the billions of dollars year after year" once the first plants begin operating. However, the company faces a critical bottleneck: its reactor design remains unapproved by the Nuclear Regulatory Commission. Oklo is working with the Department of Energy on a pilot reactor in Idaho, but full regulatory approval could take many years or even a decade before the first commercial power plant is operational.

Today, Oklo generates zero revenue and posts negligible revenue from its isotope business. Over the past 12 months, the company burned through $154 million（約250億円） in negative free cash flow, a figure that management expects will deteriorate further as manufacturing scales. With zero revenue and a $7.6 billion（約1.2兆円） market cap, the stock presents what one analyst calls "a recipe for massive investor risk," leaving shareholders exposed to both regulatory delays and the possibility of further sharp declines.

Oklo sits at the intersection of two powerful tech narratives: the energy demands of AI and the promise of next-generation nuclear power. Sam Altman's backing—worth hundreds of millions of dollars according to the article—signals confidence that the market for AI-powered data centers will create sustained demand for alternative power sources that bypass the traditional electric grid. Meta's large agreement with Oklo validates this thesis at a major customer level.

Yet the stock's 75% collapse in less than a year reveals a fundamental mismatch between the hype and the company's current reality. Oklo has zero revenue and negative free cash flow of $154 million（約250億円）, a deficit that will worsen as manufacturing scales. More critically, the company does not yet have a working reactor design approved by the Nuclear Regulatory Commission—a regulatory hurdle that could delay revenue generation by many years or even a decade. Trading at $7.6 billion（約1.2兆円） despite no revenue, Oklo embodies extreme execution and timeline risk: the gap between belief in the business case and proof of operational capability remains vast.

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