Quantum Corp
QMCO
28 hedge funds and large institutions have $8.58M invested in Quantum Corp in 2025 Q3 according to their latest regulatory filings, with 3 funds opening new positions, 13 increasing their positions, 4 reducing their positions, and 9 closing their positions.
225% more repeat investments, than reductions
Existing positions increased: 13 | Existing positions reduced: 4
3% less capital invested
Capital invested by funds: $8.82M → $8.58M (-$235K)
6.23% less ownership
Funds ownership: 12.72% → 6.5% (-6.2%)
18% less funds holding
Funds holding: 34 → 28 (-6)
67% less first-time investments, than exits
New positions opened: 3 | Existing positions closed: 9
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
UBS Group
Zurich,
Switzerland
|
+$861K |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$394K |
| 3 |
A
AlphaQuest
New York
|
+$259K |
| 4 |
FHA
Flagship Harbor Advisors
Boston,
Massachusetts
|
+$191K |
| 5 |
BlackRock
New York
|
+$177K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Marshall Wace
London,
United Kingdom
|
-$1.77M |
| 2 |
Morgan Stanley
New York
|
-$356K |
| 3 |
SCA
Sassicaia Capital Advisers
Jericho,
New York
|
-$232K |
| 4 |
AWM
Apollon Wealth Management
Mount Pleasant,
South Carolina
|
-$107K |
| 5 |
CIBC Private Wealth Group
Atlanta,
Georgia
|
-$104K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
PWA
26
Physician Wealth Advisors
Midvale,
Utah
| $1.01K | +$858 | +102 | New |
|
|
RWM
27
Rialto Wealth Management
Syracuse,
New York
| $417 | – | – | – |
|
28
JP Morgan Chase
New York
| $79 | – | – | – |
|
|
AWM
29
Activest Wealth Management
Aventure,
Florida
| $4 | – | – | – |
|
|
30
Marshall Wace
London,
United Kingdom
| – | -$1.77M | -178,021 | Closed |
|
|
SCA
31
Sassicaia Capital Advisers
Jericho,
New York
| – | -$232K | -23,267 | Closed |
|
|
AWM
32
Apollon Wealth Management
Mount Pleasant,
South Carolina
| – | -$107K | -10,714 | Closed |
|
|
33
CIBC Private Wealth Group
Atlanta,
Georgia
| – | -$104K | -10,404 | Closed |
|
34
Raymond James Financial
St Petersburg,
Florida
| – | -$46K | -4,615 | Closed |
|
35
Citigroup
New York
| – | -$12.3K | -1,236 | Closed |
|
|
C
36
Covestor
London,
United Kingdom
| – | -$9K | -942 | Closed |
|
|
CIAM
37
Caitong International Asset Management
Hong Kong
| – | -$6.3K | -632 | Closed |
|
|
FFO
38
Fortitude Family Office
Scottsdale,
Arizona
| – | -$459 | -46 | Closed |
|
QMCO Hedge Fund Activity: Q3 2025 in Review
28 of the 7,626 institutional investors tracked by Wall St. Rank reported a position in Quantum Corp (QMCO) for Q3 2025, worth a combined $8.58M — down 2.7% from $8.82M a quarter earlier.
Sellers outnumbered buyers: 9 funds closed out of QMCO and 3 opened new positions — a net loss of 6 holders — while 4 trimmed existing stakes and 13 added.
The largest buyer was UBS Group, adding an estimated $861K. The largest seller was Marshall Wace, exiting entirely with an estimated $1.77M sold.
- 28 institutional investors held Quantum Corp (QMCO) as of Q3 2025, down from 34 in Q2 2025.
- Funds reported $8.58M of Quantum Corp stock for Q3 2025, down 2.7% quarter-over-quarter.
- 3 funds opened new Quantum Corp positions in Q3 2025 and 9 closed out, a net change of -6 holders.
- The largest Quantum Corp buyer in Q3 2025 was UBS Group, an estimated $861K added.
- The largest Quantum Corp seller in Q3 2025 was Marshall Wace, an estimated $1.77M sold.
Based on aggregated 13F filings for Q3 2025.