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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.

New
Increased
Maintained
Reduced
Closed

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%)

Holders
40
Holders Change
+12
Holders Change %
+42.86%
% of All Funds
0.49%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
19
Increased
13
Reduced
6
Closed
7
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
PCM
Portolan Capital Management
Massachusetts
+$4.28M
2
Vanguard Group
Vanguard Group
Pennsylvania
+$2.89M
3
Geode Capital Management
Geode Capital Management
Massachusetts
+$694K
4
State Street
State Street
Massachusetts
+$568K
5
BlackRock
BlackRock
New York
+$524K

Top Sellers

Rank Fund Capital Flow
1
Royal Bank of Canada
Royal Bank of Canada
Ontario, Canada
-$196K
2
RCA
Riverview Capital Advisers
Massachusetts
-$99.2K
3
HCM
Hollencrest Capital Management
California
-$65.1K
4
A
AlphaQuest
New York
-$55.2K
5
SS
SBI Securities
Japan
-$31.8K
Name Holding Trade Value Shares
Change 		Change in
Stake
Osaic Holdings
26
Osaic Holdings
Arizona
$4.82K -$2.17K -242 -24%
TRCT
27
Tower Research Capital (TRC)
New York
$3.75K +$1.39K +155 +36%
Federated Hermes
28
Federated Hermes
Pennsylvania
$3.23K +$4.49K +501 New
QA
29
Quattro Advisors
Pennsylvania
$2.58K +$3.59K +400 New
Fifth Third Bancorp
30
Fifth Third Bancorp
Ohio
$1.9K – – –
EI
31
EFG International
$645 +$897 +100 New
National Bank of Canada
32
National Bank of Canada
Quebec, Canada
$644 +$897 +100 New
CCA
33
Cygnus Capital Advisors
Georgia
$448 +$623K +69,423 New
GRP
34
Global Retirement Partners
California
$419 +$583 +65 New
FDCDDQ
35
Federation des caisses Desjardins du Quebec
Quebec, Canada
$161 +$224 +25 New
Northwestern Mutual Wealth Management
36
Northwestern Mutual Wealth Management
Wisconsin
$97 +$135 +15 New
JP Morgan Chase
37
JP Morgan Chase
New York
$52 – – –
FFA
38
Farther Finance Advisors
California
$26 -$2.69K -300 -99%
AWM
39
Activest Wealth Management
Florida
$5 +$9 +1 New
RCA
40
Riverview Capital Advisers
Massachusetts
– -$99.2K -10,000 Closed
HCM
41
Hollencrest Capital Management
California
– -$65.1K -6,560 Closed
NA
42
NewEdge Advisors
Louisiana
– -$6.94K -700 Closed
FIA
43
FNY Investment Advisers
New York
– -$2K -273 Closed
WT
44
Whittier Trust
California
– -$2.2K -187 Closed
PWA
45
Physician Wealth Advisors
Utah
– -$1.01K -102 Closed
RWM
46
Rialto Wealth Management
New York
– -$417 -42 Closed
AW
47
Avion Wealth
Texas
– +$610 +68 New
1
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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.