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, Q1 2026
Institutional positions in Quantum Corp as of Mar 31, 2026. 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
- 37
- −1 vs. Q4 2025
- Shares held
- 1.61M
- +181.2K (+12.7%) vs. Q4 2025
- Total value
- $7.66M
- −$1.56M (−17.0%) vs. Q4 2025
- New holders
- 10
- 9 more added
- Sold out
- 11
- 11 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Quantum Corp; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 539,275 | $2.56M | 0.00% | +539,275 | New |
| BlackRock, Inc. | 217,532 | $1.03M | 0.00% | −3,214−1.5% | Reduced |
| Geode Capital Management, LLC | 159,179 | $756.5K | 0.00% | +2,308+1.5% | Added |
| Cygnus Capital Advisors, LLC | 124,086 | $590.0K | 0.40% | +54,663+78.7% | Added |
| UBS Group AG | 99,068 | $470.6K | 0.00% | −66,770−40.3% | Reduced |
| Vanguard Fiduciary Trust Co | 80,263 | $381.2K | 0.00% | +80,263 | New |
| State Street Corp | 72,814 | $345.9K | 0.00% | −17,900−19.7% | Reduced |
| Sona Asset Management (US) LLC | 70,092 | $332.9K | 0.01% | +70,092 | New |
| Marshall Wace, LLP | 37,528 | $178.3K | 0.00% | +15,788+72.6% | Added |
| Northern Trust Corp | 28,762 | $136.6K | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 24,598 | $116.8K | 0.00% | +6,234+33.9% | Added |
| Price T Rowe Associates Inc | 21,801 | $104.0K | 0.00% | +5,900+37.1% | Added |
| Bank of America Corp | 20,485 | $97.3K | 0.00% | −50−0.2% | Reduced |
| Flagship Harbor Advisors, LLC | 17,185 | $81.6K | 0.00% | −9,400−35.4% | Reduced |
| Bridgeway Capital Management, LLC | 16,240 | $77.1K | 0.00% | +16,240 | New |
| Morgan Stanley | 15,179 | $72.1K | 0.00% | +10,866+251.9% | Added |
| Kovack Advisors, Inc. | 12,480 | $62.8K | 0.00% | +12,480 | New |
| Barclays PLC | 12,443 | $59.1K | 0.00% | −1,754−12.4% | Reduced |
| R Squared Ltd | 12,245 | $58.2K | 0.03% | +12,245 | New |
| XTX Topco Ltd | 11,321 | $53.8K | 0.00% | −627−5.2% | Reduced |
| Vanguard Global Advisers, LLC | 6,000 | $28.5K | 0.00% | +6,000 | New |
| Wells Fargo & Company | 4,125 | $19.6K | 0.00% | +600+17.0% | Added |
| SBI Securities Co., Ltd. | 2,004 | $9.52K | 0.00% | −421−17.4% | Reduced |
| Hollencrest Capital Management | 2,000 | $9.50K | 0.00% | +2,000 | New |
| Jones Financial Companies LLLP | 1,467 | $6.87K | 0.00% | −374−20.3% | Reduced |
| Advisor Group Holdings, Inc. | 965 | $4.58K | 0.00% | +217+29.0% | Added |
| Federated Hermes, Inc. | 835 | $3.97K | 0.00% | +334+66.7% | Added |
| BNP Paribas Arbitrage, SA | 261 | $1.24K | 0.00% | −758−74.4% | Reduced |
| Royal Bank of Canada | 128 | $1.00K | 0.00% | −705−84.6% | Reduced |
| EFG International AG | 100 | $477 | 0.00% | 00.0% | Unchanged |
| National Bank of Canada | 100 | $475 | 0.00% | 00.0% | Unchanged |
| Rialto Wealth Management, LLC | 87 | $414 | 0.00% | +87 | New |
| Lavaca Capital LLC | 39 | $185 | 0.00% | +39 | New |
| Federation des caisses Desjardins du Quebec | 25 | $119 | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 8 | $34 | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 4 | $20 | 0.00% | 00.0% | Unchanged |
| Activest Wealth Management | 1 | $4 | 0.00% | 00.0% | Unchanged |
| Portolan Capital Management, LLC | 0 | $0 | 0.00% | −477,214−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −29,386−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −16,407−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −12,828−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −11,244−100.0% | Sold out |
| NBC Securities, Inc. | 0 | $0 | 0.00% | −4,000−100.0% | Sold out |
| Tower Research Capital LLC (TRC) | 0 | $0 | 0.00% | −582−100.0% | Sold out |
| Quattro Advisors LLC | 0 | $0 | 0.00% | −400−100.0% | Sold out |
| Fifth Third Bancorp | 0 | $0 | 0.00% | −295−100.0% | Sold out |
| Northwestern Mutual Wealth Management Co | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| Avion Wealth | 0 | $0 | 0.00% | −68−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |