QMCO
Quantum Corp /De/
$10.16
-0.77 (-7.04%)
At close · Jul 2
Going-concern doubt
— cleared Jun 25, 2026
The latest filing states the doubt was alleviated.
“As previously disclosed, the Company identified that there was substantial doubt about the Company’s ability to continue as a going concern. This was due to the requirement to repay the Term Loans (as defined herein) on August 5, 2026. Subsequent to March 31, 2026, the Company completed several transactions which resulted in the repayment of the Term Loans and removed the substantial doubt noted above.”View the 10-K filed Jun 25, 2026
Market Cap
$400.04M
Shares
39,374,500
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 37
Total Value: $7,650,928
Total Shares: 1,610,725
Institutional Ownership Trend
7 quarters
Holder Concentration
Across 37 13F filers · Δ vs Dec 31, 2025Top Holder
33.5%
+3.0 pts
Top 5
70.7%
−9.4 pts
Top 10
88.7%
−3.3 pts
HHI
1,582
Moderately concentrated−164
Quarterly Activity
vs Dec 31, 2025
New
10
Increased
9
Decreased
11
Sold Out
13
Unchanged
7
Holder count:
-3
Institutional value:
-42.3%
Shares held:
-21.6%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Micro Cygnus Capital Advisors, LLC | +54,663 | 124,086 | |
| Large MARSHALL WACE, LLP | +15,788 | 37,528 | |
| Mega MORGAN STANLEY | +10,866 | 15,179 | |
| Mega LPL Financial LLC | +6,234 | 24,598 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | +5,900 | 21,801 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega UBS Group AG | −66,770 | 99,068 | |
| Mega STATE STREET CORP | −17,900 | 72,814 | |
| Small FLAGSHIP HARBOR ADVISORS, LLC | −9,400 | 17,185 | |
| Mega BlackRock, Inc. | −3,214 | 217,532 | |
| Mega BARCLAYS PLC | −1,754 | 12,443 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 539,275 | $2,561,556 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 80,263 | $381,249 | |
| Mid SONA ASSET MANAGEMENT (US) LLC | 70,092 | $332,937 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | 16,240 | $77,140 | |
| Mid Kovack Advisors, Inc. | 12,480 | $59,280 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD GROUP INC | 625,538 | $4,034,719 | |
| Mid Portolan Capital Management, LLC | 477,214 | $3,078,030 | |
| Mid AlphaQuest LLC | 29,386 | $189,539 | |
| Mid Engineers Gate Manager LP | 16,407 | $105,825 | |
| Mega CITIGROUP INC | 12,828 | $82,740 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $2,561,556 | 33.48% | 539,275 | Shares | Defined | 2026-05-15 | ||||
| Mega BlackRock, Inc. | $1,033,275 | 13.51% | 217,532 | Shares | Sole | 2026-05-13 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $756,099 | 9.88% | 159,179 | Shares | Defined | 2026-05-15 | ||||
| Micro Cygnus Capital Advisors, LLC | $589,408 | 7.70% | 124,086 | Shares | Sole | 2026-05-13 | ||||
| Mega UBS Group AG | $470,572 | 6.15% | 99,068 | Shares | Defined | 2026-05-05 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $381,249 | 4.98% | 80,263 | Shares | Defined | 2026-05-08 | ||||
| Mega STATE STREET CORP | $345,866 | 4.52% | 72,814 | Shares | Defined | 2026-05-15 | ||||
| Mid SONA ASSET MANAGEMENT (US) LLC | $332,937 | 4.35% | 70,092 | Shares | Other | 2026-05-15 | ||||
| Large MARSHALL WACE, LLP | $178,258 | 2.33% | 37,528 | Shares | Other | 2026-05-15 | ||||
| Mega NORTHERN TRUST CORP Bank | $136,619 | 1.79% | 28,762 | Shares | Defined | 2026-05-14 | ||||
| Mega LPL Financial LLC | $116,840 | 1.53% | 24,598 | Shares | Sole | 2026-05-06 | ||||
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | $103,554 | 1.35% | 21,801 | Shares | Defined | 2026-05-15 | ||||
| Mega BANK OF AMERICA CORP /DE/ Bank | $97,303 | 1.27% | 20,485 | Shares | Defined | 2026-05-18 | ||||
| Small FLAGSHIP HARBOR ADVISORS, LLC | $81,628 | 1.07% | 17,185 | Shares | Sole | 2026-04-28 | ||||
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | $77,140 | 1.01% | 16,240 | Shares | Sole | 2026-05-15 | ||||
| Mega MORGAN STANLEY | $72,100 | 0.94% | 15,179 | Shares | Defined | 2026-05-15 | ||||
| Mid Kovack Advisors, Inc. | $59,280 | 0.77% | 12,480 | Shares | Sole | 2026-05-13 | ||||
| Mega BARCLAYS PLC | $59,104 | 0.77% | 12,443 | Shares | Defined | 2026-05-15 | ||||
| Small R Squared Ltd | $58,163 | 0.76% | 12,245 | Shares | Sole | 2026-04-29 | ||||
| Mid XTX Topco Ltd | $53,774 | 0.70% | 11,321 | Shares | Defined | 2026-05-15 | ||||
| Mega Vanguard Global Advisers, LLC | $28,500 | 0.37% | 6,000 | Shares | Defined | 2026-05-08 | ||||
| Mega WELLS FARGO & COMPANY/MN | $19,593 | 0.26% | 4,125 | Shares | Defined | 2026-05-11 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $9,519 | 0.12% | 2,004 | Shares | Defined | 2026-04-28 | ||||
| Mid HOLLENCREST CAPITAL MANAGEMENT | $9,500 | 0.12% | 2,000 | Shares | Sole | 2026-05-07 | ||||
| Large JONES FINANCIAL COMPANIES LLLP | $6,968 | 0.09% | 1,467 | Shares | Sole | 2026-05-15 | ||||
| Large OSAIC HOLDINGS, INC. | $4,583 | 0.06% | 965 | Shares | Defined | 2026-05-15 | ||||
| Large FEDERATED HERMES, INC. | $3,966 | 0.05% | 835 | Shares | Defined | 2026-05-11 | ||||
| Mega BNP PARIBAS ARBITRAGE, SA | $1,239 | 0.02% | 261 | Shares | Defined | 2026-05-12 | ||||
| Mega ROYAL BANK OF CANADA Bank | $608 | 0.01% | 128 | Shares | Defined | 2026-05-15 | ||||
| Large NATIONAL BANK OF CANADA /FI/ Bank | $475 | 0.01% | 100 | Shares | Defined | 2026-05-15 | ||||
| Mid EFG International AG | $475 | 0.01% | 100 | Shares | Defined | 2026-05-15 | ||||
| Micro Rialto Wealth Management, LLC | $413 | 0.01% | 87 | Shares | Sole | 2026-05-14 | ||||
| Small Lavaca Capital LLC | $185 | 0.00% | 39 | Shares | Sole | 2026-05-13 | ||||
| Large Federation des caisses Desjardins du Quebec | $118 | 0.00% | 25 | Shares | Defined | 2026-05-14 | ||||
| Mega JPMORGAN CHASE & CO | $38 | 0.00% | 8 | Shares | Defined | 2026-05-13 | ||||
| Mid Farther Finance Advisors, LLC | $19 | 0.00% | 4 | Shares | Sole | 2026-04-07 | ||||
| Small Activest Wealth Management | $4 | 0.00% | 1 | Shares | Sole | 2026-04-15 | ||||
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