Key Highlights The U.S. Department of Energy granted Preliminary Documented Safety Analysis approval for Oklo’s Aurora facility at Idaho National Laboratory. Shares increased 5.4% during prem
Oklo achieved a significant regulatory advancement Thursday when the U.S. Department of Energy granted approval for the Preliminary Documented Safety Analysis concerning its Aurora facility at Idaho National Laboratory. Shares jumped 5.4% during premarket hours, reaching $56.92 following the announcement.
The authorization originated from the DOE’s Idaho Operations Office and encompasses the preliminary safety framework for Aurora-INL, addressing hazard evaluation, accident modeling, safety systems, and engineering specifications.
Chief Executive Jacob DeWitte described the development as “an important milestone for Aurora-INL” and noted it “helps establish a foundation for future Aurora deployments.”
This authorization forms part of the DOE’s Reactor Pilot Program, which establishes a regulatory structure for constructing and operating next-generation nuclear facilities under federal supervision.
Oklo secured selection for the initiative in 2025 alongside approximately a dozen competing firms. The program operates under demanding time constraints, targeting operational status for at least three experimental reactors at U.S. national laboratories before early July.
Earlier in the week, the DOE announced that a design from competitor Antares Nuclear would become the first reactor to achieve criticality before the July 4 target date — a noteworthy development considering the competitive dynamics of the pilot initiative.
Aurora-INL represents Oklo’s inaugural fast fission energy facility. The plant will utilize recovered fuel from the Experimental Breeder Reactor-II, a reactor that ceased operations in 1994 following a governmental policy revision and congressional budget cuts.
Oklo secured rights to this recovered fuel material via a competitive DOE selection process initiated in 2019, coinciding with the company’s receipt of site authorization at Idaho National Laboratory.
The Aurora facility is under construction adjacent to Oklo’s Aurora Fuel Fabrication Facility, also situated at Idaho National Laboratory. That fabrication facility obtained its DOE safety authorization in December 2025, establishing it as the inaugural approval under the DOE’s Fuel Line Pilot Program.
Oklo is additionally investigating plutonium utilization as an interim fuel solution during the establishment of domestic high-assay low-enriched uranium supply infrastructure.
On June 4, Oklo finalized its purchase of ARMEC, a precision manufacturing and mechanical engineering company headquartered in Oak Ridge, Tennessee. The transaction brought approximately 40 engineering and technical professionals into Oklo’s workforce.
The organization also conducted its 2026 annual stockholder gathering, during which three Class II board members were elected for terms extending through 2029.
Notwithstanding Thursday’s premarket increase, the stock has experienced a challenging period. OKLO closed at $54.02 before the announcement, representing nearly a 48% decrease across the previous six months, with a market capitalization around $9.4 billion.
Analyst perspectives remain divided. UBS recently lowered its price objective to $55 while maintaining a Neutral recommendation, highlighting capital needs and implementation challenges. Wedbush preserved its Outperform designation and $110 price objective, emphasizing Oklo’s operational approach as a strategic differentiator.
Four analysts have adjusted their earnings projections upward for the upcoming period, based on InvestingPro information.
Oklo remains engaged in NRC licensing procedures to facilitate future commercial deployments extending beyond the DOE pilot structure.
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