QUANTUM CORP /DE/ - QMCO
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Jan 12, 2026 | SCHEDULE 13D/A | — | — | 13,721,291 | View |
| Dec 22, 2025 | SCHEDULE 13D/A | — | 10.0% | 13,721,291 | View |
| Oct 10, 2025 | SCHEDULE 13D | — | 2.0% | 13,333,207 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.