Quantum Corp
QMCO- Exchange
- Nasdaq
- Industry
- Computer Storage Devices
- SEC CIK
- 0000709283
In the last 90 days, Quantum Corp insiders filed 0 open-market purchases and 3 sales; 60 institutions reported holding it in 13F filings for Q2 2026, worth $158.1M in total; Oaktree Capital is the only superinvestor holding it.
13F holders, Q3 2025
Institutional positions in Quantum Corp as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 29
- −6 vs. Q2 2025
- Shares held
- 865.1K
- −19.2K (−2.2%) vs. Q2 2025
- Total value
- $8.58M
- −$234.5K (−2.7%) vs. Q2 2025
- New holders
- 3
- 13 more added
- Sold out
- 9
- 4 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting QMCO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 60 | $158.1M |
| Q1 2026 | 37 | $7.66M |
| Q4 2025 | 40 | $13.3M |
| Q3 2025 | 29 | $8.58M |
| Q2 2025 | 35 | $8.82M |
| Q1 2025 | 29 | $24.3M |
| Q4 2024 | 47 | $95.0M |
| Q3 2024 | 26 | $7.96M |
| Q2 2024 | 52 | $19.5M |
| Q1 2024 | 60 | $28.6M |
| Q4 2023 | 62 | $17.8M |
| Q3 2023 | 62 | $34.8M |
| Q2 2023 | 64 | $63.1M |
| Q1 2023 | 72 | $68.9M |
| Q4 2022 | 76 | $70.7M |
| Q3 2022 | 83 | $69.0M |
| Q2 2022 | 92 | $93.6M |
| Q1 2022 | 94 | $99.0M |
| Q4 2021 | 105 | $230.2M |
| Q3 2021 | 95 | $226.7M |
| Q2 2021 | 111 | $292.9M |
| Q1 2021 | 106 | $333.3M |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Quantum Corp; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 303,597 | $3.01M | 0.00% | +46,919+18.3% | Added |
| UBS Group AG | 162,605 | $1.61M | 0.00% | +102,384+170.0% | Added |
| BlackRock, Inc. | 162,338 | $1.61M | 0.00% | +21,027+14.9% | Added |
| Geode Capital Management, LLC | 79,427 | $788.2K | 0.00% | +10,043+14.5% | Added |
| Quest Partners LLC | 35,536 | $352.5K | 0.02% | +30,829+655.0% | Added |
| State Street Corp | 27,347 | $271.3K | 0.00% | 00.0% | Unchanged |
| Flagship Harbor Advisors, LLC | 22,710 | $225.3K | 0.01% | +22,710 | New |
| Royal Bank of Canada | 22,715 | $225.0K | 0.00% | +3,362+17.4% | Added |
| Northern Trust Corp | 11,687 | $115.9K | 0.00% | 00.0% | Unchanged |
| Riverview Capital Advisers, LLC | 10,000 | $99.2K | 0.03% | +10,000 | New |
| Hollencrest Capital Management | 6,560 | $65.1K | 0.00% | +4,560+228.0% | Added |
| SBI Securities Co., Ltd. | 5,970 | $59.2K | 0.00% | +334+5.9% | Added |
| BNP Paribas Arbitrage, SA | 3,461 | $34.3K | 0.00% | +2,641+322.1% | Added |
| Morgan Stanley | 3,356 | $33.3K | 0.00% | −42,377−92.7% | Reduced |
| Bank of America Corp | 2,896 | $28.7K | 0.00% | +2,234+337.5% | Added |
| Advisor Group Holdings, Inc. | 990 | $9.76K | 0.00% | +955+2,728.6% | Added |
| Jones Financial Companies LLLP | 895 | $8.48K | 0.00% | +401+81.2% | Added |
| GWM Advisors LLC | 700 | $6.94K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 455 | $4.51K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 427 | $4.24K | 0.00% | −295−40.9% | Reduced |
| Farther Finance Advisors, LLC | 304 | $3.02K | 0.00% | +300+7,500.0% | Added |
| Fifth Third Bancorp | 295 | $2.93K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 240 | $2.38K | 0.00% | −5,075−95.5% | Reduced |
| Whittier Trust Co | 187 | $2.20K | 0.00% | 00.0% | Unchanged |
| FNY Investment Advisers, LLC | 273 | $2.00K | 0.00% | −394−59.1% | Reduced |
| UMA Financial Services, Inc. | 102 | $1.01K | 0.00% | +102 | New |
| Rialto Wealth Management, LLC | 42 | $417 | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 8 | $79 | 0.00% | 00.0% | Unchanged |
| Activest Wealth Management | 0 | $4 | 0.00% | 0 | Unchanged |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −178,021−100.0% | Sold out |
| Sassicaia Capital Advisers LLC | 0 | $0 | 0.00% | −23,267−100.0% | Sold out |
| Apollon Wealth Management, LLC | 0 | $0 | 0.00% | −10,714−100.0% | Sold out |
| CIBC Private Wealth Group, LLC | 0 | $0 | 0.00% | −10,404−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −4,615−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −1,236−100.0% | Sold out |
| Covestor Ltd | 0 | $0 | 0.00% | −942−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −632−100.0% | Sold out |
| Fortitude Family Office, LLC | 0 | $0 | 0.00% | −46−100.0% | Sold out |