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QMCO QUANTUM CORP /DE/US-listed

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QUANTUM CORP /DE/ (QMCO) at a glance

Ticker
QMCO
Company
QUANTUM CORP /DE/
Market
US-listed
Share price
$14.47 +0.78 (+5.70%) Nov 6 close

Prices are from Yahoo! Finance and may be delayed. Always check the latest price before trading.

QUANTUM CORP /DE/ (QMCO) Stock Price History

QUANTUM CORP /DE/ closed at $14.47 on Nov 6, 2026, −56.8% over 1 month, +76.9% over 1 year.

2026-10-10 臨時報告（重要事象）（8-K） 役員の異動（就任・退任・報酬）（Item 5.02）／その他…$33.47$13.69Oct 6Nov 6
Price5-day MA25-day MAS&P 500Disclosures
1-Month High$33.47Oct 6
1-Month Low$13.69Nov 5
1-Week Change−20.8%vs Oct 30
1-Month Change−56.8%vs Oct 6

If you had invested $1,000 1 month ago, it would be worth $432 today (−56.8%).Price change only; dividends and fees are not included.

Over the same period the S&P 500 moved −5.7%, while this stock moved −56.8%.

Last 10 Trading Days

DateCloseChange% Change
Nov 6 (Fri)$14.47+0.78+5.70%
Nov 5 (Thu)$13.69−3.08−18.37%
Nov 4 (Wed)$16.77−0.90−5.09%
Nov 3 (Tue)$17.67+0.94+5.62%
Nov 2 (Mon)$16.73−1.54−8.43%
Oct 30 (Fri)$18.27−2.50−12.04%
Oct 29 (Thu)$20.77+0.05+0.24%
Oct 28 (Wed)$20.72+0.47+2.32%
Oct 27 (Tue)$20.25+1.56+8.35%
Oct 26 (Mon)$18.69+1.07+6.07%
2026-09-18 臨時報告（重要事象）（8-K） 株主総会の議決結果（Item 5.07）2026-09-28 臨時報告（重要事象）（8-K） 役員の異動（就任・退任・報酬）（Item 5.02）／その他…2026-10-10 臨時報告（重要事象）（8-K） 役員の異動（就任・退任・報酬）（Item 5.02）／その他…$34.50$11.68Aug 6Nov 6
Price5-day MA25-day MAS&P 500Disclosures
3-Month High$34.50Oct 2
3-Month Low$11.68Aug 6
1-Month Change−56.8%vs Oct 6
3-Month Change+23.9%vs Aug 6

If you had invested $1,000 3 months ago, it would be worth $1,239 today (+23.9%).Price change only; dividends and fees are not included.

Over the same period the S&P 500 moved −4.3%, while this stock moved +23.9%.

Last 10 Trading Days

DateCloseChange% Change
Nov 6 (Fri)$14.47+0.78+5.70%
Nov 5 (Thu)$13.69−3.08−18.37%
Nov 4 (Wed)$16.77−0.90−5.09%
Nov 3 (Tue)$17.67+0.94+5.62%
Nov 2 (Mon)$16.73−1.54−8.43%
Oct 30 (Fri)$18.27−2.50−12.04%
Oct 29 (Thu)$20.77+0.05+0.24%
Oct 28 (Wed)$20.72+0.47+2.32%
Oct 27 (Tue)$20.25+1.56+8.35%
Oct 26 (Mon)$18.69+1.07+6.07%
2026-09-18 臨時報告（重要事象）（8-K） 株主総会の議決結果（Item 5.07）2026-09-28 臨時報告（重要事象）（8-K） 役員の異動（就任・退任・報酬）（Item 5.02）／その他…2026-10-10 臨時報告（重要事象）（8-K） 役員の異動（就任・退任・報酬）（Item 5.02）／その他…$34.50$7.71May 6Nov 6
Price25-day MA75-day MAS&P 500Disclosures
6-Month High$34.50Oct 2
6-Month Low$7.71May 19
3-Month Change+23.9%vs Aug 6
6-Month Change+44.3%vs May 6

If you had invested $1,000 6 months ago, it would be worth $1,443 today (+44.3%).Price change only; dividends and fees are not included.

Over the same period the S&P 500 moved +0.2%, while this stock moved +44.3%.

Monthly Closes

MonthMonth-End CloseMonthly %
Nov 2026$14.47−20.8%
Oct 2026$18.27−42.4%
Sep 2026$31.72+30.4%
Aug 2026$24.33+128.7%
Jul 2026$10.64−3.3%
Jun 2026$11.00+13.3%
May 2026$9.71+36.0%
2026-09-18 臨時報告（重要事象）（8-K） 株主総会の議決結果（Item 5.07）2026-09-28 臨時報告（重要事象）（8-K） 役員の異動（就任・退任・報酬）（Item 5.02）／その他…2026-10-10 臨時報告（重要事象）（8-K） 役員の異動（就任・退任・報酬）（Item 5.02）／その他…$34.50$4.31Nov 7Nov 6
Price25-day MA75-day MAS&P 500Disclosures
52-Week High$34.50Oct 2
52-Week Low$4.31Mar 30
Year to Date+124.3%vs Dec 31
From 52-Week High−58.1%Oct 2

If you had invested $1,000 1 year ago, it would be worth $1,769 today (+76.9%).Price change only; dividends and fees are not included.

Over the same period the S&P 500 moved +9.6%, while this stock moved +76.9%.

Monthly Closes

MonthMonth-End CloseMonthly %
Nov 2026$14.47−20.8%
Oct 2026$18.27−42.4%
Sep 2026$31.72+30.4%
Aug 2026$24.33+128.7%
Jul 2026$10.64−3.3%
Jun 2026$11.00+13.3%
May 2026$9.71+36.0%
Apr 2026$7.14+50.3%
Mar 2026$4.75−13.3%
Feb 2026$5.48−11.6%
Jan 2026$6.20−3.9%
Dec 2025$6.45−17.8%
Nov 2025$7.85―
$70.67$2.51Nov 6, 2023Nov 6, 2026
Price13-week MA26-week MAS&P 500
3-Year High$70.67Dec 23, 2024
3-Year Low$2.51Sep 2, 2024
Annualized Return+17.1%
Max Drawdown−93.4%

If you had invested $1,000 3 years ago, it would be worth $1,608 today (+60.8%).Price change only; dividends and fees are not included.

Over the same period the S&P 500 moved +67.1%, while this stock moved +60.8%.

Yearly Closes

YearYear-End CloseYearly %
2026 (YTD)$14.47+124.3%
2025$6.45―
$131.00$2.51Nov 8, 2021Nov 6, 2026
Price13-week MA26-week MAS&P 500
5-Year High$131.00Nov 8, 2021
5-Year Low$2.51Sep 2, 2024
Annualized Return−35.7%
Max Drawdown−98.1%

If you had invested $1,000 5 years ago, it would be worth $110 today (−89.0%).Price change only; dividends and fees are not included.

Over the same period the S&P 500 moved +57.5%, while this stock moved −89.0%.

Yearly Closes

YearYear-End CloseYearly %
2026 (YTD)$14.47+124.3%
2025$6.45―
$2,520.00$3.08Sep 1, 1999Nov 6, 2026
Price1-year MA2-year MAS&P 500
All-Time High$2,520.00Nov 1999
All-Time Low$3.08Aug 2024
Total Change−99.4%vs Sep 1999
Annualized Return−16.9%

If you had invested $1,000 in Sep 1999, it would be worth $6 today (−99.4%).Price change only; dividends and fees are not included.

Over the same period the S&P 500 moved +431.1%, while this stock moved −99.4%.

Yearly Closes

YearYear-End CloseYearly %
2026 (YTD)$14.47+124.3%
2025$6.45−88.0%
2024$53.92+670.3%
2023$7.00−67.9%
2022$21.80−80.3%
2021$110.40−9.8%
2020$122.40−17.5%
2019$148.40+271.0%
2018$40.00−64.5%
2017$112.60−15.2%
2016$132.80−10.8%
2015$148.80−47.2%
2014$281.60+46.7%
2013$192.00−3.2%
2012$198.40−48.3%
2011$384.00−35.5%
2010$595.20+27.0%
2009$468.80+713.9%
2008$57.60−86.6%
2007$430.40+15.9%
2006$371.20−23.9%
2005$488.00+16.4%
2004$419.20−16.0%
2003$499.20+16.9%
2002$427.20−72.9%
2001$1,576.00−25.7%
2000$2,120.00−12.4%
1999$2,420.00―

Daily, weekly and monthly closes (Yahoo! Finance, split-adjusted, dividends excluded). "All" covers the range Yahoo provides (from Sep 1999). Please check the latest prices before trading.

Recent SEC filings (EDGAR)

  • 11/06 SCHEDULE 13G

Posts

This board is shared with the Japanese and Chinese versions. Feel free to write in English, Chinese or Japanese.

No.3 Disclosure 2026/10/10 05:46
臨時報告（重要事象）（8-K）
役員の異動（就任・退任・報酬）（Item 5.02）／その他の重要事象（Item 8.01）

📄 Open the filing

Delete
No.2 Disclosure 2026/09/28 21:52
臨時報告（重要事象）（8-K）
役員の異動（就任・退任・報酬）（Item 5.02）／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）

📄 Open the filing

Delete
No.1 Disclosure 2026/09/18 05:47
臨時報告（重要事象）（8-K）
株主総会の議決結果（Item 5.07）

📄 Open the filing

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