QuantumSi is trading at $1.25, down -12.94%, with the specific cause of the decline unclear.

  • No company announcement or clear catalyst explaining the decline was identified for October 2, 2026.
  • Recent Proteus development results were positive but predated this move, so they do not establish its cause.
  • Major indexes were higher in the supplied market context, so broad-market weakness does not explain QuantumSi’s decline.