Quick Takeaways
- Dialectic Technology SPV LLC filed SCHEDULE 13D/A for QUANTUM CORP /DE/ Common Stock (QMCO).
- Disclosed ownership: 37%.
- Date of event: 18 Dec 2025.
Dialectic Technology SPV LLC - 18 Dec 2025 SCHEDULE 13D/A Report for QUANTUM CORP /DE/ Common Stock (QMCO)
- Filing Manager
- Dialectic Technology SPV LLC
- Reporting Manager
- JOHN FICHTHORN
- Security
- QUANTUM CORP /DE/ Common Stock
- Symbol
- QMCO
- Shares outstanding
- 21,824,102 shares
- Disclosed Ownership
- 8,140,390 shares
- Ownership
- 37%
- Form type
- SCHEDULE 13D/A
- Filing time
- 22 Dec 2025, 20:32:47 UTC
- Date of event
- 18 Dec 2025
- Previous filing
- 10 Oct 2025
- Next filing
- 12 Jan 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"Dialectic Technology SPV LLC disclosed 37% ownership in QUANTUM CORP /DE/ Common Stock (QMCO) on 18 Dec 2025."
What Changed
- Previous schedule filing date: 10 Oct 2025.
- Current filing was accepted on 22 Dec 2025, 20:32.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (3)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Dialectic Technology SPV LLC | 37% | 8,125,119 | 0 | 8,125,119 | /s/ John Fichthorn | John Fichthorn / Authorized Signatory | 0002055322 |
| Dialectic Technology Manager LLC | 37% | 8,125,119 | 0 | 8,125,119 | /s/ John Fichthorn | John Fichthorn / Manager | |
| JOHN FICHTHORN | 37% | 8,140,390 | 15,271 | 8,125,119 | /s/ John Fichthorn | John Fichthorn | 0001411509 |