Filing Flows › Quantum (QMCO) › Who owns the stock
Who owns Quantum (QMCO) stock
65 funds reported Quantum (QMCO) shares in their latest 13F filings, worth $184M in all. The largest holder is Two Seas Capital LP ($47.3M). Last quarter 47 funds added to their stakes and 12 cut them.
Largest holders (13F)
| Fund | Shares | Value | Change | Quarter |
|---|---|---|---|---|
| Two Seas Capital LP | 1,490,992 | $47.3M | decrease | 2026-09-30 |
| Alyeska Investment Group, L.P. | 2,653,928 | $29.2M | new | 2026-06-30 |
| Oaktree Capital Management LP | 2,011,678 | $22.1M | new | 2026-06-30 |
| Neuberger Berman Group LLC | 1,163,315 | $12.8M | new | 2026-06-30 |
| Portolan Capital Management, LLC | 1,020,120 | $11.2M | new | 2026-06-30 |
| Ashford Capital Management | 1,039,200 | $10.6M | new | 2026-06-30 |
| Marshall Wace, LLP | 713,075 | $7.8M | increase | 2026-06-30 |
| Vanguard Capital Management LLC | 605,541 | $6.7M | increase | 2026-06-30 |
| Vanguard Group | 625,538 | $4.0M | increase | 2025-12-31 |
| Manatuck Hill Partners, LLC | 350,000 | $3.9M | new | 2026-06-30 |
| BlackRock | 273,030 | $3.0M | increase | 2026-06-30 |
| Cinctive Capital Management LP | 182,769 | $2.0M | new | 2026-06-30 |
| Bank of America | 170,130 | $1.9M | increase | 2026-06-30 |
| Geode Capital Management, LLC | 164,600 | $1.8M | increase | 2026-06-30 |
| Renaissance Technologies LLC | 154,516 | $1.7M | new | 2026-06-30 |
Quantum's latest quarter
Quantum, Q1 FY27: revenue $80.8M (+26% year over year), operating margin 6.2%, net loss $155M, operating cash flow $947K. The chart follows the revenue to costs, profit and cash.
Questions
Who owns the most QMCO stock?
By the latest 13F filings: Two Seas Capital LP ($47.3M); Alyeska Investment Group, L.P. ($29.2M); Oaktree Capital Management LP ($22.1M); Neuberger Berman Group LLC ($12.8M); Portolan Capital Management, LLC ($11.2M).
What is the short interest in QMCO?
3,072,986 shares were sold short at the 2026-10-15 settlement, -1.58% of the float.
Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.