Security key
747906600
- Total 13F shares
- 1,610,597
- Share change
- -442,788
- Total reported value
- $7,655,139
- Reported price per share
- $4.75
- Number of holders
- 36
- Value change
- -$3,038,370
- Number of buys
- 16
- Number of sells
- 19
- Security type / class
- Equity / Common Stock
- Shares outstanding
- 23,408,763
Holder snapshot
8 facts
Security identity
2 facts
Report period
Q1 2026
Institutions
36
Top holders
10
QMCO full security history
Ownership snapshot
Full 13F holder table
Previous quarter: Q4 2025
QUANTUM CORP /DE/ SEC filings
QUANTUM CORP /DE/ company facts
Broader feeds
Reporting periods
Holder history for CUSIP 747906600
Recent filing periods:
Ownership snapshot
Top reported holders of QMCO - QUANTUM CORP /DE/ - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Lead holder
Dialectic Technology SPV LLC
13D/G signal
Dialectic Technology SPV LLC
Evidence rows
15
Latest as of
04 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 41%
13D/G row: Dialectic Technology SPV LLC
Showing 1-6 of 15 holder rows.
Rank 1 holder
Dialectic Technology SPV LLC
13D/G
- Ownership
- 41%
- Position
- $94.49M
Rank 2 holder
VANGUARD GROUP INC
13F
13D/G
- Ownership
- 5%
- Position
- $4.03M
Rank 3 holder
Blue Torch Capital LP
13D/G
- Ownership
- 2.3%
- Position
- $1.52M
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Dialectic Technology SPV LLC |
13D/G
JOHN FICHTHORN
|
41%
|
$94,489,473
9,691,228 shares
|
+$15,120,670 | 08 Jan 2026 |
| VANGUARD GROUP INC |
13F
13D/G
Company · The Vanguard Group
|
5%
from 13D/G
|
$4,034,720
625,538 shares
|
— | 31 Dec 2025 |
| Blue Torch Capital LP |
13D/G
|
2.3%
|
$1,521,903
135,763 shares
|
-$3,029,110 | 13 Feb 2025 |
| James J. Lerner |
3/4/5
President & CEO, Director
|
0.47%
|
$1,069,550
110,848 shares
|
— | 21 Apr 2025 |
| Yue Zhou White |
3/4/5
Director
|
0.18%
|
$401,105
41,139 shares
|
— | 01 Jan 2026 |
| Don Jaworksi |
3/4/5
Director
|
0.17%
|
$386,831
39,675 shares
|
— | 01 Jan 2026 |
How to read this table
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.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
36
Shares
1,610,597
Rows available
36
| Investor | Option | Weight % | Change % | Reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* Reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that failed the local validity check.
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
39
Q1 2026 holders
36
Holder diff
-3
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend