QuantumSi is trading 5.03% up at $0.82, with no clear company-specific announcement explaining the September 25, 2026 move.

  • The broader market is higher, with the S&P 500 up 0.50% and the Nasdaq Composite up 0.49%, potentially providing a supportive backdrop.
  • QuantumSi’s previously announced New York Proteus roadshow stop was scheduled for September 24, not a newly reported catalyst for this move.