Quantum Corporation QMCO
16.78 USD -0.89 (-5.04%)
At closeNov 4, 2026, 4:00 PM EST
16.77 -0.01 -0.06%
After hours · Nov 4, 4:00 PM ET
16.13 Day range 17.71
4.19 52-week range 35.65
- YTD
- +160.16%
- 1 year
- +97.64%
Held by funds
19 US ETFs and mutual funds hold QMCO · largest positions
Ownership
Held by insiders 37.92%
Held by institutions 35.52%
Float held by institutions 57.22%
Institutions 82
Top institutional holders
| Holder | % held | Shares | Value | Reported |
|---|---|---|---|---|
| Alyeska Investment Group, L.p. | 6.73% | 2,653,928 | 70.38M | Jun 29, 2026 |
| Oaktree Capital Management LP | 5.10% | 2,011,678 | 53.35M | Jun 29, 2026 |
| Two Seas Capital Lp | 3.78% | 1,490,992 | 39.54M | Sep 29, 2026 |
| Neuberger Berman Group, LLC | 2.95% | 1,163,315 | 30.85M | Jun 29, 2026 |
| Ashford Capital Management Inc. | 2.64% | 1,039,200 | 27.56M | Jun 29, 2026 |
| Portolan Capital Management, LLC | 2.59% | 1,020,120 | 27.05M | Jun 29, 2026 |
Top mutual fund holders
| Holder | % held | Shares | Value | Reported |
|---|---|---|---|---|
| NEUBERGER BERMAN EQUITY FUNDS-Neuberger Intrinsic Value Fund | 1.97% | 776,645 | 20.60M | Aug 30, 2026 |
| VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund | 1.07% | 420,696 | 11.16M | Jun 29, 2026 |
| VANGUARD INDEX FUNDS-Vanguard Extended Market Index Fund | 0.43% | 170,893 | 4.53M | Jun 29, 2026 |
| ADVISORS' INNER CIRCLE FUND II-Mango Growth ETF | 0.23% | 90,274 | 2.39M | Jul 30, 2026 |
| Fidelity Concord Street Trust-Fidelity Extended Market Index Fund | 0.18% | 72,779 | 1.93M | Aug 30, 2026 |
| Fidelity Concord Street Trust-Fidelity Nasdaq Composite Index Fund | 0.15% | 59,502 | 1.58M | Aug 30, 2026 |
Insiders
| Insider | Relation | Latest transaction | Date | Shares held |
|---|---|---|---|---|
| CLANCY JAMES C | Chief Operating Officer | Stock Award(Grant) | Sep 30, 2026 | 163,000 |
| DIALECTIC TECHNOLOGY SPV L.L.C | Beneficial Owner of more than 10% of a Class of Security | Conversion of Exercise of derivative security | Jun 3, 2026 | 14,104,600 |
| FICHTHORN JOHN A | Director and Beneficial Owner of more than 10% of a Class of Security | Stock Award(Grant) | Sep 30, 2026 | 14,145,500 |
| GIANELLA KENNETH PHILIPPE | Chief Financial Officer | Sale | Feb 2, 2025 | 32,402 |
| JAWORKSI DON | Director | Stock Award(Grant) | Sep 30, 2026 | 51,675 |
| LERNER JAMES J | Chief Executive Officer | Sale | Apr 20, 2025 | 110,848 |