Quantum Corp
QMCO
40 hedge funds and large institutions have $12.8M invested in Quantum Corp in 2025 Q4 according to their latest regulatory filings, with 19 funds opening new positions, 13 increasing their positions, 6 reducing their positions, and 7 closing their positions.
171% more first-time investments, than exits
New positions opened: 19 | Existing positions closed: 7
117% more repeat investments, than reductions
Existing positions increased: 13 | Existing positions reduced: 6
49% more capital invested
Capital invested by funds: $8.58M → $12.8M (+$4.23M)
43% more funds holding
Funds holding: 28 → 40 (+12)
8.48% more ownership
Funds ownership: 6.5% → 14.98% (+8.5%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
+$4.28M |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$2.89M |
| 3 |
Geode Capital Management
Boston,
Massachusetts
|
+$694K |
| 4 |
State Street
Boston,
Massachusetts
|
+$568K |
| 5 |
BlackRock
New York
|
+$524K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$196K |
| 2 |
RCA
Riverview Capital Advisers
Boston,
Massachusetts
|
-$99.2K |
| 3 |
HCM
Hollencrest Capital Management
Newport Beach,
California
|
-$65.1K |
| 4 |
A
AlphaQuest
New York
|
-$55.2K |
| 5 |
SS
SBI Securities
Tokyo,
Japan
|
-$31.8K |
QMCO Hedge Fund Activity: Q4 2025 in Review
40 of the 8,239 institutional investors tracked by Wall St. Rank reported a position in Quantum Corp (QMCO) for Q4 2025, worth a combined $12.8M — up 49% from $8.58M a quarter earlier.
Buyers outnumbered sellers: 19 funds opened new QMCO positions and 7 closed out — a net gain of 12 holders — while 13 added to existing stakes and 6 trimmed.
The largest buyer was Portolan Capital Management, opening a new position worth an estimated $4.28M. The largest seller was Royal Bank of Canada, cutting an estimated $196K.
- 40 institutional investors held Quantum Corp (QMCO) as of Q4 2025, up from 28 in Q3 2025.
- Funds reported $12.8M of Quantum Corp stock for Q4 2025, up 49% quarter-over-quarter.
- 19 funds opened new Quantum Corp positions in Q4 2025 and 7 closed out, a net change of +12 holders.
- The largest Quantum Corp buyer in Q4 2025 was Portolan Capital Management, an estimated $4.28M added.
- The largest Quantum Corp seller in Q4 2025 was Royal Bank of Canada, an estimated $196K sold.
Based on aggregated 13F filings for Q4 2025.