Hyliion is trading 5.11% higher at $4.21 on September 30, 2026, with the Nasdaq’s advance possibly supporting the move; no clear company-specific catalyst was found.

  • Shares rose from the prior close of $4.01; no volume or trading-activity data was provided.
  • The Nasdaq was up 0.80% in the supplied market context.
  • September 30, 2026 coverage reported securities class-action allegations and an October 27 lead-plaintiff deadline, but those reports do not explain the gain.