Quantum-Si - 5 Year Stock Price History | QSI

The latest closing stock price for Quantum-Si as of April 15, 2025 is 1.23.

  • An investor who bought $1,000 worth of Quantum-Si stock at the IPO in 2020 would have $-876 today, roughly -1 times their original investment - a -40.60% compound annual growth rate over 4 years.
  • The all-time high Quantum-Si stock closing price was 22.41 on February 18, 2021.
  • The Quantum-Si 52-week high stock price is 5.77, which is 369.1% above the current share price.
  • The Quantum-Si 52-week low stock price is 0.61, which is 50.4% below the current share price.
  • The average Quantum-Si stock price for the last 52 weeks is 1.38.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.

Quantum-Si - 5 Year Stock Price History | QSI

  • An investor who bought $1,000 worth of Quantum-Si stock at the IPO in 2020 would have $-876 today, roughly -1 times their original investment - a -40.60% compound annual growth rate over 4 years.
  • The all-time high Quantum-Si stock closing price was 22.41 on February 18, 2021.
  • The Quantum-Si 52-week high stock price is 5.77, which is 369.1% above the current share price.
  • The Quantum-Si 52-week low stock price is 0.61, which is 50.4% below the current share price.
  • The average Quantum-Si stock price for the last 52 weeks is 1.38.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.