QuantumQMCO
13F holders, Q3 2025 (September 30)28holders −6
3new positions
9sold out
$9.92avg. 13F price*
At the end of Q3 2025, 28 institutions reported holding Quantum Corp. (QMCO) in their 13F filings, down 6 from Q2 2025. 3 opened new positions and 9 sold out. The largest holders were Vanguard Group Inc. ($3.0M), UBS Group AG ($1.6M) and BlackRock, Inc. ($1.6M).
- Company
- Quantum Corp.
- CUSIP
- 747906600
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $325K |
| Exits | 9 | $2.3M |
All 13F filers, Q2 2025 → Q3 2025: 258,801 shares bought and 278,018 shares sold, net −19,217 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 28 holders
| Vanguard Group Inc. | 0.00% | Add +18.3% | 303,597 | $3.0M |
| UBS Group AG | 0.00% | Add +170.0% | 162,605 | $1.6M |
| BlackRock, Inc. | 0.00% | Add +14.9% | 162,338 | $1.6M |
| Geode Capital Management, LLC | 0.00% | Add +14.5% | 79,427 | $788K |
| AlphaQuest LLC | 0.02% | Add +655.0% | 35,536 | $353K |
| State Street Corp. | 0.00% | No change | 27,347 | $271K |
| Flagship Harbor Advisors, LLC | 0.01% | New | 22,710 | $225K |
| Royal Bank of Canada | 0.00% | Add +17.4% | 22,715 | $225K |
| Northern Trust Corp. | 0.00% | No change | 11,687 | $116K |
| Riverview Capital Advisers, LLC | 0.03% | New | 10,000 | $99K |
| Hollencrest Capital Management | 0.00% | Add +228.0% | 6,560 | $65K |
| SBI Securities Co., Ltd. | 0.00% | Add +5.9% | 5,970 | $59K |
| BNP Paribas Financial Markets | 0.00% | Add +322.1% | 3,461 | $34K |
| Morgan Stanley | 0.00% | Reduce -92.7% | 3,356 | $33K |
| Bank of America Corp. | 0.00% | Add +337.5% | 2,896 | $29K |
| Osaic Holdings, Inc. | 0.00% | Add +2728.6% | 990 | $10K |
| Jones Financial Companies LLLP | 0.00% | Add +81.2% | 895 | $8K |
| NewEdge Advisors, LLC | 0.00% | No change | 700 | $7K |
| Barclays PLC | 0.00% | No change | 455 | $5K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -40.9% | 427 | $4K |
| Farther Finance Advisors, LLC | 0.00% | Add +7500.0% | 304 | $3K |
| Fifth Third Bancorp | 0.00% | No change | 295 | $3K |
| Wells Fargo & Company | 0.00% | Reduce -95.5% | 240 | $2K |
| Whittier Trust Co. | 0.00% | No change | 187 | $2K |
| FNY Investment Advisers, LLC | 0.00% | Reduce -59.1% | 273 | $2K |
| Physician Wealth Advisors, Inc. | 0.00% | New | 102 | $1K |
| Rialto Wealth Management, LLC | 0.00% | No change | 42 | $417 |
| JPMorgan Chase & Co. | 0.00% | No change | 8 | $79 |
"% of holder's portfolio" is QMCO's weight in each manager's 13F, not the share of Quantum Corp. the manager owns.