TRISO-X, LLC, a wholly-owned subsidiary of X-Energy, Inc. (Nasdaq: XE), has acquired approximately 70 acres of land adjacent to its nuclear fuel campus in Oak Ridge, Tennessee, bringing the total site to roughly 180 acres.

The acquisition, announced at a meeting of the Oak Ridge Industrial Development Board, comprises two separate land tracts. The additional acreage is intended to provide space for utility corridors, equipment staging, fuel storage, and long-term expansion capacity at the Horizon Center Industrial Park.

The expansion comes as TRISO-X continues vertical construction of its first commercial facility, known as TX-1. The company also holds a commercial license for HALEU fuel fabrication from the U.S. Nuclear Regulatory Commission and is conducting irradiation testing at Idaho National Laboratory to support fuel qualification for X-energy's Xe-100 small modular reactor.

The campus expansion follows a July 2026 award from Tennessee Governor Bill Lee's Nuclear Energy Fund. Plans call for two additional facilities — a second commercial fuel facility designated TX-2 and a research and development center designated TX-L — alongside the TX-1 building already under construction.

"This milestone allows us to better plan for long-term development," said Joel Duling, President of TRISO-X, in a statement accompanying the announcement.

X-energy and TRISO-X began operations in East Tennessee in 2016, operating a pilot fuel line at Oak Ridge National Laboratory.