In a tough blow for investors eyeing the nuclear energy boom, Oklo Inc. released its third-quarter 2025 earnings on Tuesday, showing a net loss that ballooned to $346.8 million, up sharply from the $13.3 million hit in the prior period. The company, still pre-revenue as it builds out its fast-fission reactor tech, posted an earnings per share of -$0.20, missing analyst expectations of -0.13 by a wide margin. Shares in OKLO closed down 6.6% at $104.22, with after-hours trading adding another 1.1% drop.
Oklo's progress on its Nuclear Fuel Facility offers some silver lining amid the red ink. The startup highlighted advancements in fuel fabrication, aiming to power data centers and remote sites with small-scale reactors. Yet, operating losses climbed to $36.3 million, underscoring the steep costs of scaling up in a capital-intensive field. Since going public via SPAC last year, Oklo stock has surged 391% year-to-date, riding hype around clean energy alternatives to fossil fuels. But this earnings miss tempers that enthusiasm, raising questions about the timeline for commercialization.
With no revenue streams yet and regulatory hurdles ahead, Oklo's path to profitability remains foggy. Investors might wonder if the nuclear renaissance can outpace these mounting expenses.