Amprius Technologies is trading 5.3% down at $9.84 after broader U.S. equity weakness on September 9, 2026.

  • The S&P 500 fell 0.58%, the Dow declined 1.18%, and the Nasdaq dropped 0.32% during the session.
  • No new company-specific announcement, earnings release, analyst action, or other direct catalyst was identified.
  • The decline is notably larger than the major-index losses, leaving the precise additional selling pressure unclear.