Quantum Corp /DE/ SEC filings QMCO
Quantum Corp /DE/ has 1,000 filings in SEC EDGAR's recent list, going back to Jul 3, 2013. Its latest annual report, Form ARS, was filed on Jul 29, 2026 for the period ended Mar 31, 2026. The latest quarterly report (Form 10-Q) was filed on Aug 11, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 9, 2026 (officer or director change, other events). The company's fiscal year ends on March 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| EFFECT | Filing | Jul 24, 2026 | — |
| NT 10-K | Filing | Jun 15, 2026 | Mar 31, 2026 |
| SD | Specialized disclosure (conflict minerals) | May 29, 2026 | — |
| EFFECT | Filing | Feb 23, 2026 | — |
| CORRESP | Letter to the SEC | Feb 19, 2026 | — |
| UPLOAD | Letter from the SEC | Feb 19, 2026 | — |
| EFFECT | Filing | Nov 21, 2025 | — |
| CORRESP | Letter to the SEC | Nov 19, 2025 | — |
| EFFECT | Filing | Sep 30, 2025 | — |
| NT 10-Q | Filing | Aug 15, 2025 | Jun 30, 2025 |
| NT 10-K | Filing | Jun 30, 2025 | Mar 31, 2025 |
| SD | Specialized disclosure (conflict minerals) | May 28, 2025 | — |
| EFFECT | Filing | Apr 28, 2025 | — |
| UPLOAD | Letter from the SEC | Apr 24, 2025 | — |
| CORRESP | Letter to the SEC | Apr 24, 2025 | — |
| EFFECT | Filing | Feb 11, 2025 | — |
| CORRESP | Letter to the SEC | Feb 7, 2025 | — |
| UPLOAD | Letter from the SEC | Feb 3, 2025 | — |
| UPLOAD | Letter from the SEC | Nov 21, 2024 | — |
| CORRESP | Letter to the SEC | Nov 18, 2024 | — |
| UPLOAD | Letter from the SEC | Nov 7, 2024 | — |
| CORRESP | Letter to the SEC | Oct 3, 2024 | — |
| CORRESP | Letter to the SEC | Sep 26, 2024 | — |
| UPLOAD | Letter from the SEC | Sep 17, 2024 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2024 | — |
| NT 10-Q | Filing | Feb 14, 2024 | Dec 31, 2023 |
| NT 10-Q | Filing | Nov 13, 2023 | Sep 30, 2023 |
| SD | Specialized disclosure (conflict minerals) | May 31, 2023 | — |
| EFFECT | Filing | Jan 13, 2023 | — |
| CORRESP | Letter to the SEC | Jan 11, 2023 | — |
| UPLOAD | Letter from the SEC | Jan 11, 2023 | — |
| RW | Filing | Dec 29, 2022 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2022 | — |
| EFFECT | Filing | Dec 29, 2021 | — |
| CORRESP | Letter to the SEC | Dec 27, 2021 | — |
| UPLOAD | Letter from the SEC | Dec 27, 2021 | — |
| EFFECT | Filing | Aug 24, 2021 | — |
| CORRESP | Letter to the SEC | Aug 20, 2021 | — |
| UPLOAD | Letter from the SEC | Aug 19, 2021 | — |
| SD/A | Filing | Jun 1, 2021 | — |
| SD | Specialized disclosure (conflict minerals) | May 28, 2021 | — |
| EFFECT | Filing | Feb 11, 2021 | — |
| CORRESP | Letter to the SEC | Feb 9, 2021 | — |
| UPLOAD | Letter from the SEC | Feb 3, 2021 | — |
| EFFECT | Filing | Dec 9, 2020 | — |
| CORRESP | Letter to the SEC | Dec 7, 2020 | — |
| UPLOAD | Letter from the SEC | Dec 3, 2020 | — |
| SD | Specialized disclosure (conflict minerals) | May 28, 2020 | — |
| CERT | Filing | Jan 30, 2020 | — |
| 8-A12B | Filing | Jan 29, 2020 | — |
| NT 10-K | Filing | Jun 14, 2019 | Mar 31, 2019 |
| SD/A | Filing | Jun 7, 2019 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 3, 2019 | — |
| NT 10-Q | Filing | Apr 9, 2019 | Dec 31, 2018 |
| 25-NSE | Delisting notice | Jan 30, 2019 | — |
| NT 10-Q | Filing | Nov 9, 2018 | Sep 30, 2018 |
| NT 10-Q | Filing | Aug 10, 2018 | Jun 30, 2018 |
| NT 10-K | Filing | Jun 15, 2018 | Mar 31, 2018 |
| SD | Specialized disclosure (conflict minerals) | May 24, 2018 | — |
| NT 10-Q | Filing | Feb 12, 2018 | Dec 31, 2017 |
| DEFR14A | Filing | Jul 12, 2017 | — |
| SD | Specialized disclosure (conflict minerals) | May 4, 2017 | — |
| DEFR14A | Definitive revised proxy soliciting materials | Mar 6, 2017 | — |
| DFAN14A | Filing | Mar 3, 2017 | — |
| DEFC14A | February 23, 2014 | Feb 23, 2017 | — |
| DEFC14A | Definitive proxy statement in connection with contested solicitations | Feb 22, 2017 | — |
| UPLOAD | Letter from the SEC | Feb 22, 2017 | — |
| PRRN14A | February 16, 2017 | Feb 17, 2017 | — |
| CORRESP | Letter to the SEC | Feb 16, 2017 | — |
| UPLOAD | Letter from the SEC | Feb 15, 2017 | — |
| PRER14A | Preliminary revised proxy soliciting materials | Feb 15, 2017 | — |
| CORRESP | Letter to the SEC | Feb 14, 2017 | — |
| UPLOAD | Letter from the SEC | Feb 13, 2017 | — |
| PREC14A | February 6, 2017 | Feb 6, 2017 | — |
| DFAN14A | February 6, 2017 | Feb 6, 2017 | — |
| PREC14A | Preliminary proxy statement in connection with contested solicitations | Feb 3, 2017 | — |
| DFAN14A | Definitive additional proxy soliciting materials filed by non-management | Feb 3, 2017 | — |
| DFAN14A | June 6, 2016 | Jun 6, 2016 | — |
| SD | Specialized disclosure (conflict minerals) | May 19, 2016 | — |
| SD | Specialized disclosure (conflict minerals) | May 14, 2015 | — |
| UPLOAD | Letter from the SEC | Jul 22, 2014 | — |
| PRRN14A | Filing | Jul 18, 2014 | — |
| CORRESP | Letter to the SEC | Jul 15, 2014 | — |
| UPLOAD | Letter from the SEC | Jul 11, 2014 | — |
| PRER14A | Preliminary revised proxy soliciting materials | Jul 10, 2014 | — |
| CORRESP | Letter to the SEC | Jul 10, 2014 | — |
| UPLOAD | Letter from the SEC | Jul 7, 2014 | — |
| UPLOAD | Letter from the SEC | Jul 2, 2014 | — |
| PREC14A | Preliminary proxy statement in connection with contested solicitations | Jun 26, 2014 | — |
| PREC14A | Filing | Jun 23, 2014 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 2, 2014 | — |
Showing 91 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Computer Storage Devices (SIC 3572)
- Listed as
- QMCO (Nasdaq)
- Fiscal year ends
- March 31
- Incorporated in
- DE
- Headquarters
- Centennial, CO
- SEC filer status
- Accelerated filer, Smaller reporting company
- SEC CIK
- 709283
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.