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Quantum (QMCO) Stock Chart & Stock Price History

Quantum logo
$15.78 -0.17 (-1.07%)
Closing price 04:00 PM Eastern
Extended Trading
$15.72 -0.06 (-0.41%)
As of 06:22 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.

Quantum Stock Price Performance

The Quantum (QMCO) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 32.16%, with a year-to-date return of 144.65%.

As of the latest close, Quantum traded at $15.95 with a market cap of $233.51 million and volume of 4.84 million shares. Five years ago, the stock traded at a split-adjusted price of $140.60, representing a 88.78% decrease over that period. At the time, it had a market cap of $404.18 million and a volume of 47,843 shares.

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5 Day
Performance
+62.51%
3 Month
Performance
+228.07%
Year-To-Date
Performance
+144.65%
1 Year
Performance
+32.16%
5 Year
Performance
-88.78%

QMCO Stock Chart for Thursday, June, 4, 2026

Quantum Stock Price History

DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
06/03/2026$12.54$15.95
+27.19%
$16.63$12.194.84 million shs$233.51 million
06/02/2026$10.49$12.54
+19.54%
$13.01$10.223.30 million shs$153.55 million
06/01/2026$9.71$10.49
+8.03%
$10.70$9.361.16 million shs$153.57 million
05/29/2026$9.32$9.71
+4.18%
$9.92$9.05520,145 shs$142.15 million
05/28/2026$8.82$9.32
+5.67%
$9.54$8.61607,786 shs$136.45 million
05/27/2026$8.73$8.82
+1.03%
$8.96$8.33399,064 shs$129.11 million
05/26/2026$9.05$8.73
-3.54%
$9.11$8.45565,640 shs$127.81 million
05/25/2026$9.05$9.05$10.18$9.001.86 million shs$132.49 million
05/22/2026$9.41$9.05
-3.83%
$10.18$9.001.86 million shs$132.49 million
05/21/2026$8.16$9.41
+15.32%
$9.65$8.281.28 million shs$137.74 million
05/20/2026$7.71$8.16
+5.84%
$8.36$7.78318,932 shs$119.46 million
05/19/2026$7.98$7.71
-3.38%
$7.96$7.46382,477 shs$112.87 million
05/18/2026$8.35$7.98
-4.43%
$8.44$7.65469,895 shs$116.81 million
05/15/2026$8.80$8.35
-5.11%
$8.57$8.10401,014 shs$122.23 million
05/14/2026$8.81$8.80
-0.11%
$9.00$8.20468,878 shs$128.83 million
05/13/2026$8.94$8.81
-1.45%
$9.08$8.57375,635 shs$128.98 million
05/12/2026$9.78$8.94
-8.59%
$9.83$8.49676,158 shs$130.86 million
05/11/2026$9.62$9.78
+1.66%
$10.26$9.17931,626 shs$143.18 million
05/08/2026$9.13$9.62
+5.37%
$9.86$8.85500,061 shs$133.65 million
05/07/2026$10.03$9.13
-9.01%
$9.72$8.76876,023 shs$133.66 million
05/06/2026$8.27$10.03
+21.33%
$10.64$9.002.26 million shs$146.90 million
05/05/2026N/A$8.27$8.30$7.41707,914 shs$121.07 million

This page (NASDAQ:QMCO) was last updated on 6/4/2026 by MarketBeat.com Staff.
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