Security key
747906600
- Type / Class
- Equity / Common Stock
- Shares outstanding
- 23,408,763
- Total 13F shares
- 2,055,041
- Share change
- +1,122,437
- Total reported value
- $13,255,450
- Price per share
- $6.45
- Number of holders
- 39
- Value change
- +$7,188,384
- Number of buys
- 28
- Number of sells
- 12
Report period
Q4 2025
Institutions
39
Top holders
10
QMCO full security history
Newer quarter: Q1 2026
Previous quarter: Q3 2025
QUANTUM CORP /DE/ SEC filings
QUANTUM CORP /DE/ company facts
Broader feeds
Reporting periods
Holder history for CUSIP 747906600
Recent filing periods:
Top shareholders of QMCO - QUANTUM CORP /DE/ - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13F
13D/G
|
Company · The Vanguard Group |
5%
from 13D/G
|
303,597
|
$3,011,682 | — | 30 Sep 2025 | |
| Blue Torch Capital LP |
13D/G
|
— |
2.3%
|
135,763
|
$1,521,903 | -$3,029,110 | 13 Feb 2025 | |
| James J. Lerner |
3/4/5
|
President & CEO, Director |
0.47%
|
110,848
|
$1,069,550 | — | 21 Apr 2025 | |
| Brian E. Cabrera |
3/4/5
|
SVP Chief Admin Ofcr & Secy |
0.12%
|
28,736
|
$277,267 | — | 21 Apr 2025 | |
| Lewis W. Moorehead |
3/4/5
|
Chief Accounting Officer |
0.11%
|
24,971
|
$240,940 | — | 21 Apr 2025 | |
| UBS Group AG |
13F
|
Company |
0.69%
|
162,605
|
$1,613,042 | — | 30 Sep 2025 | |
| BlackRock, Inc. |
13F
|
Company |
0.69%
|
162,338
|
$1,610,393 | — | 30 Sep 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.34%
|
79,427
|
$788,159 | — | 30 Sep 2025 | |
| AlphaQuest LLC |
13F
|
Company |
0.15%
|
35,536
|
$352,517 | — | 30 Sep 2025 | |
| STATE STREET CORP |
13F
|
Company |
0.12%
|
27,347
|
$271,282 | — | 30 Sep 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.1%
|
22,715
|
$225,000 | — | 30 Sep 2025 | |
| FLAGSHIP HARBOR ADVISORS, LLC |
13F
|
Company |
0.1%
|
22,710
|
$225,283 | — | 30 Sep 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.05%
|
11,687
|
$115,935 | — | 30 Sep 2025 | |
| Riverview Capital Advisers, LLC |
13F
|
Company |
0.04%
|
10,000
|
$99,200 | — | 30 Sep 2025 | |
| HOLLENCREST CAPITAL MANAGEMENT |
13F
|
Company |
0.03%
|
6,560
|
$65,075 | — | 30 Sep 2025 | |
| SBI Securities Co., Ltd. |
13F
|
Company |
0.03%
|
5,970
|
$59,222 | — | 30 Sep 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
0.01%
|
3,461
|
$34,333 | — | 30 Sep 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.01%
|
3,356
|
$33,296 | — | 30 Sep 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.01%
|
2,896
|
$28,728 | — | 30 Sep 2025 | |
| OSAIC HOLDINGS, INC. |
13F
|
Company |
0%
|
990
|
$9,758 | — | 30 Sep 2025 | |
| JONES FINANCIAL COMPANIES LLLP |
13F
|
Company |
0%
|
895
|
$8,485 | — | 30 Sep 2025 | |
| NewEdge Advisors, LLC |
13F
|
Company |
0%
|
700
|
$6,944 | — | 30 Sep 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0%
|
455
|
$4,514 | — | 30 Sep 2025 | |
| Tower Research Capital LLC (TRC) |
13F
|
Company |
0%
|
427
|
$4,236 | — | 30 Sep 2025 | |
| Farther Finance Advisors, LLC |
13F
|
Company |
0%
|
304
|
$3,016 | — | 30 Sep 2025 | |
| FIFTH THIRD BANCORP |
13F
|
Company |
0%
|
295
|
$2,926 | — | 30 Sep 2025 | |
| FNY Investment Advisers, LLC |
13F
|
Company |
0%
|
273
|
$2,000 | — | 30 Sep 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0%
|
240
|
$2,381 | — | 30 Sep 2025 | |
| WHITTIER TRUST CO |
13F
|
Company |
0%
|
187
|
$2,199 | — | 30 Sep 2025 | |
| Physician Wealth Advisors, Inc. |
13F
|
Company |
0%
|
102
|
$1,012 | — | 30 Sep 2025 | |
| Rialto Wealth Management, LLC |
13F
|
Company |
0%
|
42
|
$417 | — | 30 Sep 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0%
|
8
|
$79 | — | 30 Sep 2025 | |
| BRC Group Holdings, Inc. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
5,399,896
|
$2,519,591 | — | 30 Sep 2021 | |
| Kenneth P. Gianella |
3/4/5
|
Chief Financial Officer |
—
class O/S missing
|
32,402
|
$697,583 | — | 03 Feb 2025 | |
| Henk Jan Spanjaard |
3/4/5
|
Chief Revenue Officer |
—
class O/S missing
|
14,903
|
$531,739 | — | 16 Jan 2025 | |
| J. Michael Dodson |
3/4/5
|
Senior Vice President, CFO |
—
class O/S missing
|
870,372
|
$406,116 | — | 05 Oct 2022 | |
| John Hurley |
3/4/5
|
Chief Revenue Officer |
—
class O/S missing
|
341,519
|
$159,353 | — | 05 Sep 2023 | |
| Marc E. Rothman |
3/4/5
|
Director |
—
class O/S missing
|
297,625
|
$138,872 | — | 01 Sep 2022 | |
| Elizabeth King |
3/4/5
|
Chief Revenue Officer |
—
class O/S missing
|
285,114
|
$133,034 | — | 07 Jul 2021 | |
| Raghavendra Rau |
3/4/5
|
Director |
—
class O/S missing
|
257,874
|
$120,324 | — | 22 Apr 2022 | |
| Rebecca Jacoby |
3/4/5
|
Director |
—
class O/S missing
|
158,624
|
$74,014 | — | 01 Sep 2022 |
Institutional Holders of QUANTUM CORP /DE/ - Common Stock (QMCO) as of Q4 2025
As of 31 Dec 2025,
QUANTUM CORP /DE/ - Common Stock (QMCO) was held by
39 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
2,055,041 shares.
The largest 10 holders included
VANGUARD GROUP INC, Portolan Capital Management, LLC, BlackRock, Inc., UBS Group AG, GEODE CAPITAL MANAGEMENT, LLC, STATE STREET CORP, Cygnus Capital Advisors, LLC, AlphaQuest LLC, NORTHERN TRUST CORP, and FLAGSHIP HARBOR ADVISORS, LLC.
This page lists
39
institutional shareholders reporting positions in this security
for the Q4 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
28
Q4 2025 holders
39
Holder diff
11
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 Value $ | Q4 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.