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1.06
7.07%
0.07
After Hours:
1.05
-0.01
-0.94%
Quantum Si Incorporated Stock (QSI) Price History
The historical daily chart and data for Quantum Si Incorporated stock (QSI), show that the latest closing stock price as of May 22, 2026, is $1.06.
- Quantum Si Incorporated all-time high stock price is $10.15, occurred on September 01, 2021.
- The lowest Quantum Si Incorporated stock price recorded was $0.6121 on November 19, 2024. Since then, Quantum Si Incorporated's stock price has risen over 73.17% to $1.06 now.
- The 52-week high stock price for QSI is $3.10, representing a 192.45% increase from the current share price, occurred on October 16, 2025.
- The 52-week low stock price for QSI is $0.6912, indicating a -34.79% decrease from the current share price, occurred on April 07, 2026.
- The closing price of Quantum Si Incorporated (QSI) stock in the beginning of 2025 was $8.2201. The stock closed the year at $1.83, a loss of over -77.74% for the year.
The table below shows more information about QSI historical price data:
Daily
Weekly
Monthly
7D
30D
60D
YTD
1Y
| Date | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| May 22, 2026 | $1.09 | $0.9955 | $0.0945 | 8,784,372.0 | +7.07% |
| May 21, 2026 | $0.99 | $0.867 | $0.123 | 11,121,516.0 | +13.05% |
| May 20, 2026 | $0.88 | $0.8406 | $0.0394 | 4,664,653.0 | +1.71% |
| May 19, 2026 | $0.8665 | $0.821 | $0.0455 | 3,086,862.0 | +0.83% |
| May 18, 2026 | $0.8955 | $0.8268 | $0.0687 | 4,552,186.0 | -4.07% |
| May 15, 2026 | $0.9111 | $0.882 | $0.0291 | 3,672,991.0 | -4.59% |
| May 14, 2026 | $0.96 | $0.905 | $0.055 | 4,413,304.0 | +0.38% |
| May 13, 2026 | $0.9584 | $0.9022 | $0.0562 | 4,846,510.0 | -1.60% |
| May 12, 2026 | $1.03 | $0.90 | $0.13 | 10,024,181.0 | +2.42% |
| May 11, 2026 | $0.9478 | $0.89 | $0.0578 | 5,732,640.0 | +1.72% |
| May 08, 2026 | $0.9734 | $0.88 | $0.0934 | 13,104,390.0 | -7.55% |
| May 07, 2026 | $1.03 | $0.956 | $0.074 | 7,084,335.0 | -4.80% |
| May 06, 2026 | $1.04 | $0.962 | $0.078 | 7,958,986.0 | +7.15% |
| May 05, 2026 | $0.9844 | $0.9455 | $0.0389 | 2,499,675.0 | -1.05% |
| May 04, 2026 | $0.985 | $0.94 | $0.045 | 2,862,107.0 | +1.39% |
| May 01, 2026 | $1.00 | $0.9419 | $0.0581 | 3,565,495.0 | -2.28% |
| Apr 30, 2026 | $1.02 | $0.8765 | $0.1435 | 11,879,028.0 | +13.39% |
| Apr 29, 2026 | $0.9066 | $0.8631 | $0.0435 | 3,416,724.0 | -5.18% |
| Apr 28, 2026 | $0.94 | $0.8853 | $0.0547 | 3,088,789.0 | +1.30% |
| Apr 27, 2026 | $0.94 | $0.8714 | $0.0686 | 3,082,095.0 | -0.61% |
Quantum Si Incorporated Stock (QSI) Year by Year Price History
In this detailed analysis, we present a comprehensive overview of the price movements of Quantum Si Incorporated stock over the years. By exploring the year-by-year data, investors can gain valuable insights into the historical performance and volatility of QSI shares. From significant milestones and fluctuations to notable trends, this in-depth examination of Quantum Si Incorporated stock price history provides a foundation for understanding how the company's stock has evolved over time.
Quantum Si Incorporated Stock (QSI) Price History 2026
| Month | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| May, 2026 | $1.09 | $0.821 | $0.269 | 106,758,575.0 | +8.10% |
| Apr, 2026 | $1.14 | $0.6912 | $0.4488 | 114,946,690.0 | +26.69% |
| Mar, 2026 | $1.10 | $0.7252 | $0.3748 | 78,030,480.0 | -19.07% |
| Feb, 2026 | $1.13 | $0.887 | $0.243 | 75,653,291.0 | -15.36% |
| Jan, 2026 | $1.34 | $1.11 | $0.23 | 99,940,985.0 | +2.73% |
Quantum Si Incorporated Stock (QSI) Price History 2025
| Month | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Dec, 2025 | $1.54 | $1.10 | $0.44 | 96,175,752.0 | -21.28% |
| Nov, 2025 | $2.19 | $1.19 | $0.995 | 115,571,602.0 | -34.42% |
| Oct, 2025 | $3.10 | $1.41 | $1.69 | 401,229,971.0 | +52.48% |
| Sep, 2025 | $1.79 | $1.03 | $0.76 | 216,756,850.0 | +25.89% |
| Aug, 2025 | $1.49 | $0.9499 | $0.5401 | 136,180,923.0 | -24.32% |
| Jul, 2025 | $2.18 | $1.47 | $0.71 | 165,986,914.0 | -24.49% |
| Jun, 2025 | $2.14 | $1.55 | $0.59 | 158,414,170.0 | +16.67% |
| May, 2025 | $2.15 | $1.12 | $1.03 | 222,626,483.0 | +47.37% |
| Apr, 2025 | $1.30 | $1.02 | $0.285 | 63,004,922.0 | -5.00% |
| Mar, 2025 | $1.76 | $1.12 | $0.64 | 168,074,933.0 | -13.04% |
| Feb, 2025 | $2.25 | $1.28 | $0.97 | 167,420,487.0 | -30.30% |
| Jan, 2025 | $5.77 | $1.85 | $3.92 | 749,973,379.0 | -26.67% |
Quantum Si Incorporated Stock (QSI) Price History 2024
| Month | High | Low | High - Low | Volume | % Change |
|---|---|---|---|---|---|
| Dec, 2024 | $4.14 | $1.08 | $3.06 | 712,357,764.0 | +166.40% |
| Nov, 2024 | $1.89 | $0.6121 | $1.28 | 390,803,292.0 | +78.32% |
| Oct, 2024 | $0.9079 | $0.7001 | $0.2078 | 10,690,042.0 | -20.54% |
| Sep, 2024 | $1.10 | $0.8688 | $0.2312 | 8,883,893.0 | -6.82% |
| Aug, 2024 | $1.11 | $0.785 | $0.325 | 12,013,490.0 | -13.14% |
| Jul, 2024 | $1.26 | $0.8818 | $0.3782 | 13,645,905.0 | +3.81% |
| Jun, 2024 | $1.66 | $0.732 | $0.928 | 24,896,066.0 | -30.92% |
| May, 2024 | $1.99 | $1.50 | $0.49 | 12,210,599.0 | -5.59% |
| Apr, 2024 | $1.99 | $1.48 | $0.515 | 11,788,724.0 | -18.27% |
| Mar, 2024 | $2.43 | $1.54 | $0.89 | 22,630,215.0 | +17.96% |
| Feb, 2024 | $1.86 | $1.38 | $0.48 | 12,201,465.0 | +7.05% |
| Jan, 2024 | $2.16 | $1.53 | $0.629 | 12,246,791.0 | -22.39% |
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