QUANTUM CORP (QMCO) is held by 25 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is VANGUARD CAPITAL MANAGEMENT LLC as of Q1 2026.

Are institutions buying or selling QMCO?

In Q1 2026, 11 institutions opened or increased positions in QUANTUM CORP while 14 reduced or exited — a net selling quarter.

What is the Smart Money Verdict on QMCO?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for QUANTUM CORP.

How many hedge funds hold QMCO?

25 institutional investors report holding QUANTUM CORP (QMCO) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into QMCO?

As of Q1 2026, tracked institutions in QUANTUM CORP show 11 buyers versus 14 sellers — net outflows.

QUANTUM CORP

QMCO·747906600·US·Common Stock·Technology - Computer Hardware-Activist

Holders

Avg rating(9 Elite)

$6.4M

Total Value

44% (30)

Fund Consensus

11 buying - 14 selling

Smart Money Verdict

View all

Held by 25 funds

9 elite

Who's Trading

InsiderMHMeyrath HuguesSell $65KJul 2, 2026

InsiderNANash Laura A.Sell $3KJul 2, 2026

ActivistDTDialectic Technology SPV LLC40.0%Jun 8, 2026

InsiderNANash Laura A.Sell $592.96Apr 2, 2026

ActivistDTDialectic Technology SPV LLC41.3%Jan 12, 2026

InsiderMHMeyrath HuguesSell $32KOct 2, 2025

InsiderNANash Laura A.Sell $7KOct 2, 2025

InsiderNANash Laura A.Sell $1KOct 1, 2025

InsiderNANash Laura A.Sell $2KSep 12, 2025

ActivistLFLONG FOCUS CAPITAL MANAGEMENT, LLC0.0%May 15, 2025

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
VAVANGUARD CAPITAL MANAGEMENT LLC	New	539,275	$2.6M	0.0%	+115.95%	36
BlackRock, Inc.	Decreased	217,532(-1.5%)	$1M	0.0%	-74.26%	0
GEODE CAPITAL MANAGEMENT, LLC	Increased	159,179(+1.5%)	$756,472	0.0%	-67.00%	17
UBS Group AG	Decreased	99,068(-40.3%)	$470,573	0.0%	-24.52%	0
VFVANGUARD FIDUCIARY TRUST CO	New	80,263	$381,249	0.0%	+115.95%	33
STATE STREET CORP	Decreased	72,814(-19.7%)	$345,867	0.0%	+5.45%	0
MWMARSHALL WACE, LLP	Increased	37,528(+72.6%)	$178,258	0.0%	+70.92%	34
NORTHERN TRUST CORP	Unchanged	28,762	$136,620	0.0%	-64.92%	0
LPL Financial LLC	Increased	24,598(+34.0%)	$116,841	0.0%	+61.22%	19
PRICE T ROWE ASSOCIATES INC /MD/	Increased	21,801(+37.1%)	$104,000	0.0%	+62.16%	19
BANK OF AMERICA CORP /DE/	Decreased	20,485(-0.2%)	$97,304	0.0%	+12.99%	0
MORGAN STANLEY	Increased	15,179(+251.9%)	$72,100	0.0%	+60.72%	23
BARCLAYS PLC	Decreased	12,443(-12.3%)	$59,104	0.0%	+27.26%	0
XTX Topco Ltd	Decreased	11,321(-5.3%)	$53,775	0.0%	+48.44%	0
VGVanguard Global Advisers, LLC	New	6,000	$28,500	0.0%	+115.95%	30
WELLS FARGO & COMPANY/MN	Increased	4,125(+17.0%)	$19,594	0.0%	+51.61%	15
JONES FINANCIAL COMPANIES LLLP	Decreased	1,467(-20.3%)	$6,866	0.0%	+9.08%	0
OSAIC HOLDINGS, INC.	Increased	965(+29.0%)	$4,584	0.0%	+4.53%	13
FEDERATED HERMES, INC.	Increased	835(+66.7%)	$3,966	0.0%	+69.66%	14
BNP PARIBAS FINANCIAL MARKETS	Decreased	261(-74.4%)	$1,240	0.0%	-5.01%	0