Oklo Inc.Oklo's Groves reactor achieved first criticality, a major technical milestone.

Oklo announced that its Groves Isotope Test Reactor in Texas achieved first criticality on August 5th, marking the first time a nuclear reactor has reached a self-sustaining fission chain reaction. The company believes this is the fastest privately funded, privately sited nuclear reactor build in history, reaching criticality less than a year after construction began. Groves is the first project in the U.S. Department of Energy's Reactor Pilot Program to reach criticality from a greenfield site on private land. This milestone is for the Groves Isotopes Facility, not the Aurora commercial power projects, which target late 2027 to early 2028 for the Idaho National Laboratory site and early 2030 for the Ohio powerhouse supporting Meta's data centers. Oklo shares surged more than 10% on August 7th following the update.
Oklo Inc.Oklo's Groves reactor achieved first criticality, a major technical milestone.