Quantum (QMCO) - Market capitalization

Market cap: $0.14 Billion USD

As of December 2025 Quantum has a market cap of $0.14 Billion USD. This makes Quantum the world's 8876th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Quantum from 1999 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	$0.14 B	621.04%
2024	$20.1 M	-39.37%
2023	$33.16 M	-70.69%
2022	$0.11 B	-65.49%
2021	$0.32 B	31.55%
2020	$0.24 B	-15.69%
2019	$0.29 B	315.89%
2018	$71.1 M	-63.58%
2017	$0.19 B	-13.49%
2016	$0.22 B	-8.14%
2015	$0.24 B	-45.53%
2014	$0.45 B	51.41%
2013	$0.29 B	-0.28%
2012	$0.29 B	-46.75%
2011	$0.56 B	-33%
2010	$0.83 B	33.41%
2009	$0.62 B	729.62%
2008	$75.63 M	-86.32%
2007	$0.55 B	21.92%
2006	$0.45 B	-20.63%
2005	$0.57 B	18.89%
2004	$0.48 B	-14.44%
2003	$0.56 B	21.79%
2002	$0.46 B	-69.93%
2001	$1.53 B	-23.81%
2000	$2.01 B	-17.14%
1999	$2.42 B

End of Day market cap according to different sources

On Dec 8th, 2025 the market cap of Quantum was reported to be:

$0.12 Billion USD

by Nasdaq

$0.14 Billion USD

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Quantum QMCO	$0.14 B	0.00%	🇺🇸 USA
Seagate Technology STX	$61.66 B	42,428.73%	🇮🇪 Ireland

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of Quantum (QMCO)

Market cap: $0.14 Billion USD