Oklo's shares climbed 1.21% in pre-market trading, reaching $44.54 following a significant green light from the U.S. Department of Energy. The DOE's startup authorization permits Oklo to load fuel, conduct startup testing, and operate its Groves Isotope Test Reactor, marking a key milestone in the company's nuclear expansion efforts.

The Groves reactor stands out as a privately funded and constructed project on company-owned land, avoiding reliance on national laboratory infrastructure. It serves as a low-power test platform, vital for domestic isotope production that supports healthcare, scientific research, and national security applications. The startup authorization confirms that engineering readiness and safety measures meet rigorous federal standards, enabling operational launch.

This progress showcases Oklo's ability to complete a complex reactor project swiftly and independently, establishing a repeatable commercial model for future advanced nuclear deployments. Groves also provides key operational experience to back the company’s pipeline of upcoming reactors.