No.5
Disclosure
2026/11/06 06:54
四半期報告書（10-Q）
QSI Quantum-Si IncUS-listed
5 posts
Quantum-Si Inc (QSI) at a glance
Prices are from Yahoo! Finance and may be delayed. Always check the latest price before trading.
Quantum-Si Inc (QSI) Stock Price History
Quantum-Si Inc closed at $1.33 on Nov 6, 2026, +9.0% over 1 month, −15.6% over 1 year.
Price5-day MA25-day MAS&P 500Disclosures
1-Month High$1.75Oct 29
1-Month Low$1.09Oct 19
1-Week Change−8.9%vs Oct 30
1-Month Change+9.0%vs Oct 6
If you had invested $1,000 1 month ago, it would be worth $1,090 today (+9.0%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved −5.7%, while this stock moved +9.0%.
Last 10 Trading Days
| Date | Close | Change | % Change |
|---|---|---|---|
| Nov 6 (Fri) | $1.33 | +0.16 | +13.68% |
| Nov 5 (Thu) | $1.17 | −0.12 | −9.30% |
| Nov 4 (Wed) | $1.29 | −0.01 | −0.77% |
| Nov 3 (Tue) | $1.30 | +0.04 | +3.17% |
| Nov 2 (Mon) | $1.26 | −0.20 | −13.70% |
| Oct 30 (Fri) | $1.46 | −0.29 | −16.57% |
| Oct 29 (Thu) | $1.75 | +0.03 | +1.74% |
| Oct 28 (Wed) | $1.72 | +0.07 | +4.24% |
| Oct 27 (Tue) | $1.65 | +0.19 | +13.01% |
| Oct 26 (Mon) | $1.46 | +0.06 | +4.29% |
Price5-day MA25-day MAS&P 500Disclosures
3-Month High$1.75Oct 29
3-Month Low$0.72Sep 15
1-Month Change+9.0%vs Oct 6
3-Month Change+76.2%vs Aug 6
If you had invested $1,000 3 months ago, it would be worth $1,762 today (+76.2%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved −4.3%, while this stock moved +76.2%.
Last 10 Trading Days
| Date | Close | Change | % Change |
|---|---|---|---|
| Nov 6 (Fri) | $1.33 | +0.16 | +13.68% |
| Nov 5 (Thu) | $1.17 | −0.12 | −9.30% |
| Nov 4 (Wed) | $1.29 | −0.01 | −0.77% |
| Nov 3 (Tue) | $1.30 | +0.04 | +3.17% |
| Nov 2 (Mon) | $1.26 | −0.20 | −13.70% |
| Oct 30 (Fri) | $1.46 | −0.29 | −16.57% |
| Oct 29 (Thu) | $1.75 | +0.03 | +1.74% |
| Oct 28 (Wed) | $1.72 | +0.07 | +4.24% |
| Oct 27 (Tue) | $1.65 | +0.19 | +13.01% |
| Oct 26 (Mon) | $1.46 | +0.06 | +4.29% |
Price25-day MA75-day MAS&P 500Disclosures
6-Month High$1.75Oct 29
6-Month Low$0.70Jul 29
3-Month Change+76.2%vs Aug 6
6-Month Change+29.1%vs May 6
If you had invested $1,000 6 months ago, it would be worth $1,291 today (+29.1%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +0.2%, while this stock moved +29.1%.
Monthly Closes
| Month | Month-End Close | Monthly % |
|---|---|---|
| Nov 2026 | $1.33 | −8.9% |
| Oct 2026 | $1.46 | +36.4% |
| Sep 2026 | $1.07 | +39.7% |
| Aug 2026 | $0.77 | +7.6% |
| Jul 2026 | $0.71 | −19.5% |
| Jun 2026 | $0.89 | −25.6% |
| May 2026 | $1.19 | +21.3% |
Price25-day MA75-day MAS&P 500Disclosures
52-Week High$1.75Oct 29
52-Week Low$0.70Jul 29
Year to Date+20.9%vs Dec 31
From 52-Week High−24.0%Oct 29
If you had invested $1,000 1 year ago, it would be worth $844 today (−15.6%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +9.6%, while this stock moved −15.6%.
Monthly Closes
| Month | Month-End Close | Monthly % |
|---|---|---|
| Nov 2026 | $1.33 | −8.9% |
| Oct 2026 | $1.46 | +36.4% |
| Sep 2026 | $1.07 | +39.7% |
| Aug 2026 | $0.77 | +7.6% |
| Jul 2026 | $0.71 | −19.5% |
| Jun 2026 | $0.89 | −25.6% |
| May 2026 | $1.19 | +21.3% |
| Apr 2026 | $0.98 | +26.7% |
| Mar 2026 | $0.77 | −19.0% |
| Feb 2026 | $0.96 | −15.4% |
| Jan 2026 | $1.13 | +2.7% |
| Dec 2025 | $1.10 | −22.0% |
| Nov 2025 | $1.41 | ― |
Price13-week MA26-week MAS&P 500
3-Year High$4.29Dec 30, 2024
3-Year Low$0.71Jul 31, 2026
Annualized Return−2.2%
Max Drawdown−83.4%
If you had invested $1,000 3 years ago, it would be worth $937 today (−6.3%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +67.1%, while this stock moved −6.3%.
Yearly Closes
| Year | Year-End Close | Yearly % |
|---|---|---|
| 2026 (YTD) | $1.33 | +20.9% |
| 2025 | $1.10 | ― |
Price13-week MA26-week MAS&P 500
5-Year High$8.17Nov 8, 2021
5-Year Low$0.71Jul 31, 2026
Annualized Return−30.5%
Max Drawdown−91.3%
If you had invested $1,000 5 years ago, it would be worth $163 today (−83.7%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +57.5%, while this stock moved −83.7%.
Yearly Closes
| Year | Year-End Close | Yearly % |
|---|---|---|
| 2026 (YTD) | $1.33 | +20.9% |
| 2025 | $1.10 | ― |
Price1-year MA2-year MAS&P 500
All-Time High$20.49Feb 2021
All-Time Low$0.71Jul 2026
Total Change−86.5%vs Nov 2020
Annualized Return−28.4%
If you had invested $1,000 in Nov 2020, it would be worth $135 today (−86.5%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +103.7%, while this stock moved −86.5%.
Yearly Closes
| Year | Year-End Close | Yearly % |
|---|---|---|
| 2026 (YTD) | $1.33 | +14.7% |
| 2025 | $1.16 | −73.0% |
| 2024 | $4.29 | +113.4% |
| 2023 | $2.01 | +9.8% |
| 2022 | $1.83 | −76.7% |
| 2021 | $7.87 | −22.5% |
| 2020 | $10.15 | ― |
Daily, weekly and monthly closes (Yahoo! Finance, split-adjusted, dividends excluded). "All" covers the range Yahoo provides (from Nov 2020). Please check the latest prices before trading.
Recent SEC filings (EDGAR)
- 11/05 16:54 10-Q
- 11/05 16:15 8-K 決算発表（経営成績・財政状態）（Item 2.02）／財務諸表および添付資料（Item 9.01）
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No.4
Disclosure
2026/11/06 06:15
臨時報告（重要事象）（8-K）
決算発表（経営成績・財政状態）（Item 2.02）／財務諸表および添付資料（Item 9.01）
決算発表（経営成績・財政状態）（Item 2.02）／財務諸表および添付資料（Item 9.01）
Delete
No.3
Disclosure
2026/10/15 22:15
臨時報告（重要事象）（8-K）
その他の重要事象（Item 8.01）／財務諸表および添付資料（Item 9.01）
その他の重要事象（Item 8.01）／財務諸表および添付資料（Item 9.01）
Delete
No.2
Disclosure
2026/10/09 05:12
臨時報告（重要事象）（8-K）
レギュレーションFD開示（Item 7.01）／財務諸表および添付資料（Item 9.01）
レギュレーションFD開示（Item 7.01）／財務諸表および添付資料（Item 9.01）
Delete
No.1
Disclosure
2026/09/29 09:29
臨時報告（重要事象）（8-K）
レギュレーションFD開示（Item 7.01）／財務諸表および添付資料（Item 9.01）
レギュレーションFD開示（Item 7.01）／財務諸表および添付資料（Item 9.01）
Delete
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