QMCO
QUANTUM (QMCO)
NASDAQ
$23.64+$0.06 (+0.26%)
Price as of Sep 11, 2026 7:50 PM EDT
  • $929.3M
    Market Cap
  • 220.38%
    1-Year Change
  • Computer Hardware
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
B. RILEY SECURITIES, INC.
9.71%
3.8M
+3.8M (+100.00%)
Dec 31, 2022
ALYESKA INVESTMENT GROUP, L.P.
6.74%
2.7M
+2.7M (+100.00%)
Jun 30, 2026
TWO SEAS CAPITAL LP
6.32%
2.5M
+2.5M (+100.00%)
Jun 30, 2026
OAKTREE CAPITAL MANAGEMENT LP
5.11%
2.0M
+2.0M (+100.00%)
Jun 30, 2026
NEUBERGER BERMAN GROUP LLC
2.95%
1.2M
+1.2M (+100.00%)
Jun 30, 2026
ASHFORD CAPITAL MANAGEMENT INC
2.64%
1.0M
+1.0M (+100.00%)
Jun 30, 2026
PORTOLAN CAPITAL MANAGEMENT, LLC
2.59%
1.0M
+1.0M (+100.00%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions636.4M (70.47%)
  • Mutual Funds226.7M (25.10%)
  • Insiders40.0M (4.43%)
  • Other0 (0.00%)

Insider Transactions

  • 4.43% (40.0M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 3
    Number of InsiderSelling (last 12 months)
  • $1.9M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Craythorne Anthony
Chief Revenue Officer
Sell
Aug 03, 2026
$15,856.13
1,478
$10.73
13,522
Meyrath Hugues
President & CEO
Sell
Jul 02, 2026
$65,498.32
6,232
$10.51
118,468
Nash Laura A.
Chief Accounting Officer
Sell
Jul 02, 2026
$2,732.60
260
$10.51
10,770
Nash Laura A.
Chief Accounting Officer
Sell
Apr 02, 2026
$592.96
109
$5.44
11,030
Meyrath Hugues
President & CEO
Award
Apr 01, 2026
$0.00
850,000
$0.00
850,000
Craythorne Anthony
Chief Revenue Officer
Award
Apr 01, 2026
$0.00
148,500
$0.00
148,500
Nash Laura A.
Chief Accounting Officer
Award
Apr 01, 2026
$0.00
49,500
$0.00
49,500
White William Hillis
Chief Financial Officer
Award
Mar 04, 2026
$0.00
25,000
$0.00
25,000
Jaworksi Don
Award
Jan 01, 2026
$0.00
12,000
$0.00
39,675
White Yue Zhou
Award
Jan 01, 2026
$0.00
12,000
$0.00
41,139
FICHTHORN JOHN
Award
Jan 01, 2026
$0.00
12,000
$0.00
27,271
Meyrath Hugues
President & CEO
Award
Jan 01, 2026
$0.00
50,000
$0.00
50,000
Craythorne Anthony
Chief Revenue Officer
Award
Jan 01, 2026
$0.00
15,000
$0.00
15,000
Meyrath Hugues
President & CEO
Award
Jan 01, 2026
$0.00
62,500
$0.00
124,700
FICHTHORN JOHN
Other
Dec 18, 2025
$0.00
0
$0.00
0
Dialectic Technology SPV LLC
Other
Dec 18, 2025
$0.00
0
$0.00
0
Blevins Tony J
Award
Nov 01, 2025
$0.00
1,000
$0.00
1,000
Clancy James C
Award
Nov 01, 2025
$0.00
1,000
$0.00
1,000
Meyrath Hugues
President & CEO
Award
Nov 01, 2025
$0.00
50,000
$0.00
50,000
Meyrath Hugues
President & CEO
Award
Nov 01, 2025
$0.00
37,500
$0.00
62,200
Meyrath Hugues
President & CEO
Sell
Oct 02, 2025
$32,308.50
2,975
$10.86
24,700
Nash Laura A.
Chief Accounting Officer
Sell
Oct 02, 2025
$6,635.46
611
$10.86
11,139
Nash Laura A.
Chief Accounting Officer
Award
Oct 01, 2025
$0.00
500
$0.00
11,868
Nash Laura A.
Chief Accounting Officer
Sell
Oct 01, 2025
$1,169.38
118
$9.91
11,750
FICHTHORN JOHN
Other
Sep 23, 2025
$0.00
2.7M
$0.00
2.7M
Nash Laura A.
Chief Accounting Officer
Sell
Sep 12, 2025
$2,101.32
284
$7.40
11,368
FICHTHORN JOHN
Award
May 01, 2025
$0.00
4,405
$0.00
15,271
Moorehead Lewis W.
Chief Accounting Officer
Award
Apr 21, 2025
$0.00
333
$0.00
25,150
Cabrera Brian E
SVP Chief Admin Ofcr & Secy
Award
Apr 21, 2025
$0.00
1,874
$0.00
29,814
Moorehead Lewis W.
Chief Accounting Officer
Sell
Apr 21, 2025
$1,727.14
179
$9.65
24,971