Quantum Corporation (QMCO)
NASDAQ: QMCO · Real-Time Price · USD
22.78
-1.39 (-5.75%)
At close: Sep 2, 2026, 4:00 PM EDT
23.00
+0.22 (0.97%)
After-hours: Sep 2, 2026, 7:46 PM EDT
Quantum Market Cap
Quantum has a market cap or net worth of $897.76 million as of September 2, 2026. Its market cap has increased by 806.83% in one year.
Market Cap
897.76M
Enterprise Value
852.17M
1-Year Change
806.83%
Ranking
Category
Stock Price
$22.78
ChartMarket Cap Chart
Since August 2, 1999, Quantum's market cap has decreased from $3.22B to $897.76M, a decrease of -72.13%. That is a compound annual growth rate of -4.60%.
| Date | Market Cap | % Change |
|---|---|---|
| Sep 2, 2026 | 897.76M | 914.42% |
| Dec 31, 2025 | 88.50M | -66.14% |
| Dec 31, 2024 | 261.40M | 687.35% |
| Dec 29, 2023 | 33.20M | -70.67% |
| Dec 30, 2022 | 113.20M | -65.40% |
| Dec 31, 2021 | 327.20M | 31.25% |
| Dec 31, 2020 | 249.30M | -9.05% |
| Dec 31, 2019 | 274.10M | 295.53% |
| Dec 31, 2018 | 69.30M | -64.50% |
| Dec 29, 2017 | 195.20M | -13.51% |
| Dec 30, 2016 | 225.70M | -8.03% |
| Dec 31, 2015 | 245.40M | -45.43% |
| Dec 31, 2014 | 449.70M | 51.06% |
| Dec 31, 2013 | 297.70M | -0.27% |
| Dec 31, 2012 | 298.50M | -46.78% |
| Dec 30, 2011 | 560.90M | -31.77% |
| Dec 31, 2010 | 822.10M | 31.73% |
| Dec 31, 2009 | 624.10M | 725.53% |
| Dec 31, 2008 | 75.60M | -86.23% |
| Dec 31, 2007 | 549.00M | 21.92% |
| Dec 29, 2006 | 450.30M | -20.58% |
| Dec 30, 2005 | 567.00M | 18.64% |
| Dec 31, 2004 | 477.90M | -13.95% |
| Dec 31, 2003 | 555.40M | 31.61% |
| Dec 31, 2002 | 422.00M | -72.44% |
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Market Capitalization
Market capitalization, also called net worth, is the total value of all of a company's outstanding shares. It is calculated by multiplying the stock price by the number of shares outstanding.
Formula: Market Cap = Stock Price * Shares Outstanding
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