NNE is trading 8.2% down at $21.25 following a sharp leadership shakeup within the company's executive ranks.

  • The company disclosed that CTO and Head of Reactor Development Dr. Florent Heidet was terminated effective June 22, 2026.
  • CEO James Walker has stepped in as Interim Head of Reactor Development to oversee the department during the transition.
  • This management disruption is weighing heavily on investor sentiment, extending a multi-day slide for the stock.