QuantumSi is trading at $1.46, down 5.72% in pre-market on October 5, after a four-session run-up; the cause of the decline remains unclear.

  • Shares rose each session from September 29 through October 2, including 33.64% on October 1.
  • No October 5 company announcement or clear fresh catalyst surfaced; the latest company-specific news was September 28 Proteus interim data.
  • Broad futures were only modestly lower, so the decline is not clearly attributable to macro sentiment.