Shares of Oklo Inc (NYSE:OKLO) opened higher on Wednesday, rising more than 6% after the company announced a notable regulatory development for its Aurora powerhouse project in Idaho. The U.S. Nuclear Regulatory Commission has signed off on Oklo’s Principal Design Criteria topical report, a document that sets out the core safety, reliability and performance expectations for the company’s future reactor designs.
The approval gives Oklo a formalized set of standards it can reference in subsequent regulatory submissions, potentially limiting the need for repetitive, design-by-design reviews as the company advances its technology. According to Oklo, the topical report provides a regulatory framework that describes fundamental requirements for future reactors.
Regulators completed their review of the topical report in a timeframe described by the company as less than half the usual duration for such assessments. The Nuclear Regulatory Commission accepted the report for review in 15 days, markedly quicker than the conventional 30- to 60-day acceptance window.
Commenting on the milestone, Oklo co-founder and CEO Jacob DeWitte said, "This milestone reflects strong work by the Oklo team and timely engagement by the regulator. Performance-based licensing, clear criteria, and efficient reviews are important to advancing modern nuclear projects safely and responsibly."
The company and the NRC noted that the sped-up review aligns with broader federal efforts to modernize licensing pathways. Those efforts followed executive orders issued in May 2025 aimed at streamlining energy procedures, and they reflect mandates contained in the ADVANCE Act, which seeks to create a more efficient deployment path for next-generation American nuclear technology.
Oklo describes its mission as delivering clean energy at scale through fast fission power plants and domestic fuel recycling initiatives. The firm also previously became the first to receive a site use permit from the U.S. Department of Energy for a commercial advanced fission plant, a milestone the company highlights as part of its development track record.
While the NRC approval of the Principal Design Criteria topical report does not itself authorize construction or operation, it establishes a referenceable set of regulatory expectations that Oklo can use in future applications. The company’s stock movement at the open reflected investor response to the regulatory progress.
Oklo and federal regulators framed the faster review as consistent with recent policy priorities to accelerate deployment of advanced nuclear technology while maintaining safety and reliability standards.