Nuclear reactor developer X-energy Reactor Company LLC announced Monday the successful close of a $700 million Series D funding round, signaling investor confidence in the company’s vision for the future of advanced nuclear energy.

Oversubscribed Funding Round Led by Jane Street

The oversubscribed round was spearheaded by Jane Street, with participation from new investors including ARK Invest, Galvanize, Hood River Capital Management, Point72, Reaves Asset Management, and XTX Ventures. Existing backers such as Ares Management, Corner Capital, Emerson Collective, NGP, and Segra Capital Management also joined the financing.

Advised by Latham & Watkins LLP, X-energy said the proceeds will bolster its supply chain and commercial pipeline, supporting an order book exceeding 11 gigawatts—enough to power 144 advanced small modular reactors (SMRs).

Founder Highlights Vision for Accessible Nuclear Energy

Executive Chairman and founder Kam Ghaffarian emphasized the round’s significance:

"The response and commitment from the participants in this financing round is a strong affirmation of the role X-energy expects to play in shaping the future of energy," he said. "With the support of our investors, both new and existing, we are closer to realizing that vision."

Xe-100 Reactors and TRISO-X Fuel Power Major Partnerships

X-energy’s Xe-100 small modular reactor and TRISO-X fuel are central to the company’s strategy, powering initiatives with corporate giants including Dow, Amazon, and Centrica.

• A proposed four-unit Xe-100 plant is planned at Dow’s UCC Seadrift Operations site in Texas, backed by the U.S. Department of Energy’s Advanced Reactor Demonstration Program.

• Amazon has secured options to deploy more than five gigawatts of Xe-100 projects across the U.S. by 2039.

• In the U.K., X-energy is partnering with Centrica to deploy six gigawatts of its modular reactors.

Latham & Watkins Leads Legal Advisory Team

The Latham team advising X-energy was led by corporate partners John Slater, Peter Sluka, and Paul Sheridan, with support from tax partners Tim Fenn and Christine Mainguy and benefits partner Michelle Carpenter.

This latest financing round positions X-energy at the forefront of global efforts to deploy scalable, safe, and commercially viable nuclear energy solutions.