Quantum Corporation (QMCO)
Technology
Computer Hardware
10.60 $
-5.3%
vs. previous close
Closing price · As of: 31. Jul 2026
Who owns Quantum Corporation (QMCO)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.3% of the shares are freely tradable; institutional investors hold 12.8%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
12.8%
Insiders
Share of the stock held by the executives, founders and major shareholders of the company itself.
37.1%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
99.3%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
7.0%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
39Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Group Inc | 4.27 | 625,538 | +106.0 | 12/31/2025 |
| Vanguard Capital Management, LLC | 3.68 | 539,275 | +0.0 | 03/31/2026 |
| BlackRock Inc | 1.49 | 217,532 | -1.5 | 03/31/2026 |
| Geode Capital Management, LLC | 1.09 | 159,179 | +1.5 | 03/31/2026 |
| Cygnus Capital Advisors, LLC | 0.85 | 124,086 | +78.7 | 03/31/2026 |
| UBS Group AG | 0.68 | 99,068 | -40.3 | 03/31/2026 |
| Vanguard Fiduciary Trust Co | 0.55 | 80,263 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 2.56 | 374,196 | +0.0 | 04/30/2026 |
| Vanguard Institutional Extnd Mkt Idx Tr | 1.05 | 153,251 | +0.0 | 04/30/2026 |
| Mango Growth ETF | 0.60 | 88,493 | +0.0 | 05/29/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.