Oklo Inc. just got some good news from the nuclear regulators — and it came faster than anyone expected.

On Wednesday, the company announced that the U.S. Nuclear Regulatory Commission has approved the Principal Design Criteria (PDC) topical report for its Aurora powerhouse, which is currently under construction in Idaho. This isn't just a bureaucratic checkbox; it's a big deal for Oklo and for the advanced nuclear industry as a whole.

The approval means that the NRC has signed off on the basic safety and design principles for the Aurora reactor. That clears the path for future license applications, because the agency won't need to re-review the same material. Think of it as getting a key building block pre-approved — it saves time and money down the road.

And the timeline is worth noting. The PDC report was approved in less than half the traditional review period. Even more striking: the NRC issued a notice of acceptance in just 15 days, versus the typical 30 to 60 days. That's not just fast by nuclear standards; it's fast by any regulatory standard.

This accelerated pace isn't an accident. It follows executive orders from May 2025 aimed at streamlining licensing procedures for advanced reactors. The NRC has been under pressure to modernize, and this approval shows those efforts are bearing fruit.

Oklo has been a trailblazer in this space. It was the first company to receive a site use permit from the U.S. Department of Energy for a commercial advanced fission plant. CEO Jacob DeWitte highlighted the importance of performance-based licensing and efficient reviews, saying the milestone underscores how modern nuclear projects can advance safely when the process is streamlined.

The approval also positions Oklo well in the clean energy race. The company is developing fast fission power plants designed to deliver clean, reliable, and affordable energy globally. It's also working on nuclear fuel recycling and isotope supply chains, which could give it an edge in sustainability.

Federal support, like the ADVANCE Act, further bolsters Oklo's efforts by promoting efficient deployment pathways for advanced nuclear technologies. As the nuclear sector looks to expand its role in clean energy, Oklo's regulatory wins are a signal that the industry is moving — and moving fast.

Investors took notice. Oklo shares were up 9.22% at $74.74 at publication on Wednesday.