X-Energy is trading 4.1% down at $15.07; no clear company-specific explanation for the decline was found.
- On September 25, 2026, the company announced that TRISO-X president Joel Duling plans to retire November 20. He will remain an advisor, and Jason Hatfield will take interim leadership.
- The announcement did not link the change to the share-price decline, so it is not a confirmed catalyst. Broader markets were higher, but the available context does not establish a market-wide reason for the drop.