Sam Altman, the high-profile CEO of OpenAI, has formally resigned as chairman of Oklo Inc., the nuclear technology company he has headed since 2015. The surprise move, announced on Tuesday, is a significant change for the nuclear startup as it gets ready to address the rapidly rising energy demands of artificial intelligence and other industries.
Oklo co-founder and CEO Jacob DeWitte will assume the additional role of chairman in addition to his existing position, while co-founder Caroline Cochran remains the company’s COO. The leadership change comes at a pivotal moment for Oklo as it seeks to commercialize its next-generation nuclear reactor technology.
“Sam has been instrumental in charting the course of Oklo from day one,” DeWitte stated. “We are extremely thankful for his leadership and dedication to our vision.”
The stock market responded warily to the news initially, with Oklo stock declining over 11% in after-hours trading on Tuesday. The shares recovered on Wednesday as investors digested the implications of the leadership change.
Why is Altman walking away?
Although the precise reason for Altman’s exit wasn’t explained, the decision seems to be strategic. By resigning, Altman may leave the door open for Oklo to pursue alliances with a wider set of AI firms, perhaps even OpenAI itself.
In his announcement, Altman was optimistic about Oklo’s future: “Fission is a critical solution for powering the increasing energy needs of artificial intelligence and other high-priority industries. With Jake and Caroline at the helm, Oklo is poised to answer these needs.”

He went on to say, “As Oklo is building strategic partnerships to bring clean energy at scale, namely to enable the deployment of AI, I believe the time is right for me to make the transition.”
What is new in Oklo’s approach is that it is based on recycled nuclear fuel and includes passive safety design. The firm aims to address environmental and economic concerns that have traditionally been linked with traditional nuclear power plants.
The company went public for the first time in May 2024 by combining with Altman’s special purpose acquisition company, AltC Acquisition Corp., increasing its capital adequacy. Oklo is currently valued at approximately $2.83 billion.
Challenges on the horizon
With promising technology and its strong cash position, Oklo still has hurdles to overcome. The company still has yet to transition to commercial deployment of any project, and the road ahead to approval by regulators, construction financing, and large-scale deployment is complicated.
Oklo’s lack of fixed revenue commitments and reliance on government grants have been recognized as possible risks by analysts. The company is to bring its first commercial reactor online in 2027-2028, but success will depend on the capacity to secure long-term power purchase agreements and negotiate the regulatory framework.
Oklo leadership change is concurrent with increased interest in nuclear power, with the global desire to achieve net-zero emissions and the meteoric growth of AI technologies whose operations consume colossal quantities of electricity.
As data centers use ever-greater quantities of electricity to power and train sophisticated AI models, firms such as Oklo are positioning themselves to supply the clean, stable energy necessary to fuel this digital revolution.