Latest Period
Q4 2025
Security Snapshot
QUANTUM CORP /DE/ - Common Stock (QMCO) Institutional Ownership
CUSIP: 747906600
13F Institutional Holders and Ownership History from Q3 2024 to Q1 2026
Institutions Reporting
38
Shares (Excl. Options)
1,985,618
Price
$6.45
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- Type / Class
- Equity / Common Stock
- Symbol
- QMCO on Nasdaq
- Shares outstanding
- 23,408,763
- Price per share
- $6.42
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 1,985,618
- Total reported value
- $12,807,450
- % of total 13F portfolios
- 0%
- Share change
- +1,122,437
- Value change
- +$7,188,384
- Number of holders
- 38
- Price from insider filings
- $6.42
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- QMCO - QUANTUM CORP /DE/ - Common Stock is tracked under CUSIP 747906600.
- 38 institutions reported positions in Q4 2025.
- 3 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 38 to 11 between Q4 2025 and Q1 2026.
- Reported value moved from $12,807,450 to $3,717,556.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 38 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 747906600?
CUSIP 747906600 identifies QMCO - QUANTUM CORP /DE/ - Common Stock in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 747906600:
Significant Owners of QUANTUM CORP /DE/ - Common Stock (QMCO) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Dialectic Technology SPV LLC | 41% | +11% | $94,489,473 | +$15,120,670 | 9,691,228 | +19% | JOHN FICHTHORN | 08 Jan 2026 |
| VANGUARD GROUP INC | 5% | $2,714,883 | 242,184 | The Vanguard Group | 31 Dec 2024 | |||
| Blue Torch Capital LP | 2.3% | -68% | $1,521,903 | -$3,029,110 | 135,763 | -67% | Blue Torch Capital LP | 13 Feb 2025 |
As of 31 Dec 2025, 38 institutional investors reported holding 1,985,618 shares of QUANTUM CORP /DE/ - Common Stock (QMCO). This represents 8.5% of the company’s total 23,408,763 outstanding shares.
Institutional Holders of QUANTUM CORP /DE/ - Common Stock (QMCO) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 782,643 | $3,717,556 | -$483,873 | $4.75 | 11 |
| 2025 Q4 | 1,985,618 | $12,807,450 | +$7,188,384 | $6.45 | 38 |
| 2025 Q3 | 865,123 | $8,581,114 | -$227,218 | $9.92 | 28 |
| 2025 Q2 | 884,339 | $8,816,100 | -$12,755,971 | $9.97 | 34 |
| 2025 Q1 | 1,689,433 | $24,295,053 | -$24,451,428 | $14.38 | 29 |
| 2024 Q4 | 1,735,848 | $93,599,486 | +$12,327,384 | $53.92 | 42 |
| 2024 Q3 | 2,274,493 | $7,960,753 | +$7,810,308 | $3.50 | 26 |