Get the Stockscreener App
1.26
0.59%
-0.02
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 January 07, 2026, is $1.26.
- 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 105.85% to $1.26 now.
- The 52-week high stock price for QSI is $3.10, representing a 146.03% increase from the current share price, occurred on October 16, 2025.
- The 52-week low stock price for QSI is $0.9499, indicating a -24.61% decrease from the current share price, occurred on August 20, 2025.
- 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 |
|---|---|---|---|---|---|
| Jan 07, 2026 | $1.32 | $1.25 | $0.0613 | 3,588,373.0 | -1.17% |
| Jan 06, 2026 | $1.34 | $1.26 | $0.08 | 7,590,079.0 | +1.59% |
| Jan 05, 2026 | $1.31 | $1.19 | $0.125 | 8,283,527.0 | +8.62% |
| Jan 02, 2026 | $1.16 | $1.11 | $0.05 | 4,769,951.0 | +5.45% |
| Dec 31, 2025 | $1.15 | $1.07 | $0.08 | 5,879,429.0 | -0.90% |
| Dec 30, 2025 | $1.17 | $1.10 | $0.07 | 7,864,808.0 | -5.93% |
| Dec 29, 2025 | $1.26 | $1.17 | $0.0899 | 7,875,490.0 | -4.07% |
| Dec 26, 2025 | $1.31 | $1.22 | $0.09 | 4,148,353.0 | -6.11% |
| Dec 24, 2025 | $1.33 | $1.24 | $0.09 | 4,344,121.0 | +6.50% |
| Dec 23, 2025 | $1.25 | $1.20 | $0.055 | 4,177,208.0 | -3.15% |
| Dec 22, 2025 | $1.32 | $1.25 | $0.0666 | 5,060,920.0 | +0.00% |
| Dec 19, 2025 | $1.29 | $1.21 | $0.08 | 6,681,026.0 | +4.10% |
| Dec 18, 2025 | $1.31 | $1.21 | $0.10 | 3,379,248.0 | +1.67% |
| Dec 17, 2025 | $1.27 | $1.20 | $0.075 | 3,714,693.0 | -1.64% |
| Dec 16, 2025 | $1.26 | $1.18 | $0.08 | 4,836,542.0 | -0.81% |
| Dec 15, 2025 | $1.32 | $1.22 | $0.10 | 3,951,578.0 | -4.65% |
| Dec 12, 2025 | $1.43 | $1.29 | $0.14 | 5,568,233.0 | -7.86% |
| Dec 11, 2025 | $1.44 | $1.34 | $0.0951 | 4,265,026.0 | -2.78% |
| Dec 10, 2025 | $1.45 | $1.39 | $0.06 | 3,531,627.0 | +1.41% |
| Dec 09, 2025 | $1.46 | $1.39 | $0.0699 | 3,675,600.0 | -2.07% |
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 |
|---|---|---|---|---|---|
| Jan, 2026 | $1.34 | $1.11 | $0.23 | 24,231,930.0 | +15.00% |
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% |
1.20%
0.43%
Open in Yahoo
|
Open in Google
|
Open in Finviz
|
Open in MarketWatch
|
Open in EDGAR
|
Open in Reuters
Cap:
|
Volume (24h):