Horizon Quantum Holdings is trading 7.43% down at $16.20 after no clear company-specific announcement was identified for September 3, 2026.

  • On September 2, shares jumped 19.95% to $17.50, with the catalyst unclear.
  • External pre-market data shows limited activity, with 71 shares reported before the open.
  • Broader indexes are little changed, so macro sentiment does not clearly explain the move.