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, Q2 2026
Institutional positions in Quantum Corp as of Jun 30, 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
- 60
- +23 vs. Q1 2026
- Shares held
- 14.5M
- +12.8M (+797.3%) vs. Q1 2026
- Total value
- $158.1M
- +$150.4M (+1,964.7%) vs. Q1 2026
- New holders
- 31
- 18 more added
- Sold out
- 8
- 7 more reduced
Compare with Q1 2026: 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 | $9.01M |
| Q1 2025 | 29 | $24.3M |
| Q4 2024 | 47 | $95.0M |
| Q3 2024 | 26 | $7.96M |
| Q2 2024 | 52 | $19.5M |
| Q1 2024 | 60 | $28.7M |
| 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 | $230.6M |
| Q3 2021 | 95 | $226.7M |
| Q2 2021 | 111 | $292.9M |
| Q1 2021 | 106 | $333.3M |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Quantum Corp; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Alyeska Investment Group, L.P. | 2,653,928 | $29.2M | 0.08% | +2,653,928 | New |
| Two Seas Capital LP | 2,488,535 | $27.4M | 1.04% | +2,488,535 | New |
| Oaktree Capital Management LPSuperinvestorOaktree Capital | 2,011,678 | $22.1M | 0.42% | +2,011,678 | New |
| Neuberger Berman Group LLC | 1,163,315 | $12.8M | 0.01% | +1,163,315 | New |
| Portolan Capital Management, LLC | 1,020,120 | $11.2M | 0.42% | +1,020,120 | New |
| Ashford Capital Management Inc | 1,039,200 | $10.6M | 1.13% | +1,039,200 | New |
| Marshall Wace, LLP | 713,075 | $7.84M | 0.01% | +675,547+1,800.1% | Added |
| Vanguard Capital Management LLC | 605,541 | $6.66M | 0.00% | +66,266+12.3% | Added |
| Manatuck Hill Partners, LLC | 350,000 | $3.85M | 1.28% | +350,000 | New |
| BlackRock, Inc. | 273,030 | $3.00M | 0.00% | +55,498+25.5% | Added |
| Cinctive Capital Management LP | 182,769 | $2.01M | 0.08% | +182,769 | New |
| Bank of America Corp | 170,130 | $1.87M | 0.00% | +149,645+730.5% | Added |
| Geode Capital Management, LLC | 164,600 | $1.81M | 0.00% | +5,421+3.4% | Added |
| Renaissance Technologies LLC | 154,516 | $1.70M | 0.00% | +154,516 | New |
| Sona Asset Management (US) LLC | 150,000 | $1.65M | 0.06% | +79,908+114.0% | Added |
| Walleye Capital LLC | 120,044 | $1.32M | 0.01% | +120,044 | New |
| Raymond James Financial Inc | 103,836 | $1.14M | 0.00% | +103,836 | New |
| Centiva Capital, LP | 100,000 | $1.10M | 0.04% | +100,000 | New |
| Vanguard Fiduciary Trust Co | 89,125 | $980.4K | 0.00% | +8,862+11.0% | Added |
| KKM Financial LLC | 90,274 | $960.5K | 0.13% | +90,274 | New |
| Qube Research & Technologies Ltd | 80,977 | $890.7K | 0.00% | +80,977 | New |
| State Street Corp | 75,914 | $835.1K | 0.00% | +3,100+4.3% | Added |
| Cygnus Capital Advisors, LLC | 74,323 | $818.0K | 0.56% | −49,763−40.1% | Reduced |
| Susquehanna International Group, LLP | 69,775 | $767.5K | 0.00% | +69,775 | New |
| Man Group plc | 68,593 | $754.5K | 0.00% | +68,593 | New |
| EAM Investors, LLC | 64,857 | $713.4K | 0.06% | +64,857 | New |
| UBS Group AG | 46,106 | $507.2K | 0.00% | −52,962−53.5% | Reduced |
| SEI Investments Co | 38,739 | $426.1K | 0.00% | +38,739 | New |
| Susquehanna Fundamental Investments, LLC | 34,601 | $380.6K | 0.01% | +34,601 | New |
| Squarepoint Ops LLC | 33,817 | $372.0K | 0.00% | +33,817 | New |
| Northern Trust Corp | 33,220 | $365.4K | 0.00% | +4,458+15.5% | Added |
| Price T Rowe Associates Inc | 25,069 | $276.0K | 0.00% | +3,268+15.0% | Added |
| Millennium Management LLC | 21,755 | $239.3K | 0.00% | +21,755 | New |
| Goldman Sachs Group Inc | 19,153 | $210.7K | 0.00% | +19,153 | New |
| Bridgeway Capital Management, LLC | 16,240 | $178.6K | 0.00% | 00.0% | Unchanged |
| Morgan Stanley | 15,492 | $170.4K | 0.00% | +313+2.1% | Added |
| Citigroup Inc | 14,426 | $158.7K | 0.00% | +14,426 | New |
| Kovack Advisors, Inc. | 13,430 | $146.8K | 0.01% | +950+7.6% | Added |
| Schonfeld Strategic Advisors LLC | 12,055 | $132.6K | 0.00% | +12,055 | New |
| Wells Fargo & Company | 11,300 | $124.3K | 0.00% | +7,175+173.9% | Added |
| Flagship Harbor Advisors, LLC | 11,004 | $121.0K | 0.00% | −6,181−36.0% | Reduced |
| Invesco Ltd. | 10,839 | $119.2K | 0.00% | +10,839 | New |
| Vanguard Global Advisers, LLC | 6,000 | $66.0K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 3,680 | $43.6K | 0.00% | +3,672+45,900.0% | Added |
| Jones Financial Companies LLLP | 1,580 | $18.4K | 0.00% | +113+7.7% | Added |
| BNP Paribas Arbitrage, SA | 1,187 | $13.1K | 0.00% | +926+354.8% | Added |
| Federated Hermes, Inc. | 1,158 | $12.7K | 0.00% | +323+38.7% | Added |
| SBI Securities Co., Ltd. | 1,070 | $11.8K | 0.00% | −934−46.6% | Reduced |
| Royal Bank of Canada | 765 | $8.00K | 0.00% | +637+497.7% | Added |
| Tower Research Capital LLC (TRC) | 655 | $7.21K | 0.00% | +655 | New |
| Advisor Group Holdings, Inc. | 485 | $5.34K | 0.00% | −480−49.7% | Reduced |
| Barclays PLC | 455 | $5.00K | 0.00% | −11,988−96.3% | Reduced |
| Harbour Investments, Inc. | 183 | $2.01K | 0.00% | +183 | New |
| FMR LLC | 106 | $1.17K | 0.00% | +106 | New |
| EFG International AG | 100 | $1.10K | 0.00% | 00.0% | Unchanged |
| Global Retirement Partners, LLC | 65 | $715 | 0.00% | +65 | New |
| Continuum Advisory, LLC | 34 | $374 | 0.00% | +34 | New |
| Quarry LP | 17 | $187 | 0.00% | +17 | New |
| Hollencrest Capital Management | 10 | $110 | 0.00% | −1,990−99.5% | Reduced |
| Farther Finance Advisors, LLC | 4 | $44 | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 0 | $0 | 0.00% | −24,598−100.0% | Sold out |
| R Squared Ltd | 0 | $0 | 0.00% | −12,245−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −11,321−100.0% | Sold out |
| National Bank of Canada | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Rialto Wealth Management, LLC | 0 | $0 | 0.00% | −87−100.0% | Sold out |
| Lavaca Capital LLC | 0 | $0 | 0.00% | −39−100.0% | Sold out |
| Federation des caisses Desjardins du Quebec | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Activest Wealth Management | 0 | $0 | 0.00% | −1−100.0% | Sold out |