# Quantum Corp: filings

QMCO · Nasdaq · CIK 709283 · [Technology](/sectors/technology.md) · fiscal year ends Mar 31

Pages: [Overview](/companies/qmco.md) · [Financials](/companies/qmco/financials.md) · [Filings](/companies/qmco/filings.md) · [Insiders](/companies/qmco/insiders.md)

## Reports and events: 399 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 550, 8-K 252, SC 13G/A 66, 3 56, 10-Q 51, SC 13D/A 37, DEFA14A 28, SC 13G 28, UPLOAD 26, CORRESP 23, 4/A 20, 10-K 17, DEF 14A 17, S-8 14, SD 13, 144 11, EFFECT 11, 424B3 10, ARS 10, SCHEDULE 13D/A 8, NT 10-Q 7, PRE 14A 6, S-3 6, SC TO-I/A 6, NT 10-K 5, SC 13D 5, 3/A 4, DFAN14A 4, PREC14A 4, S-1 4, SCHEDULE 13G 3, SCHEDULE 13G/A 3, 10-K/A 2, 10-Q/A 2, 424B2 2, DEFC14A 2, DEFR14A 2, PRER14A 2, PRRN14A 2, S-3/A 2, S-8 POS 2, SCHEDULE 13D 2, SD/A 2, 25-NSE 1, 424B5 1, 8-A12B 1, 8-K/A 1, CERT 1, D 1, POS AM 1, RW 1, S-1/A 1, S-3ASR 1, SC TO-I 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-09 | 20:46 ET | [8-K](/filings/0001628280-26-065547.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events | 0001628280-26-065547 |
| 2026-09-28 | 12:52 ET | [8-K](/filings/0001628280-26-063661.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0001628280-26-063661 |
| 2026-09-17 | 20:47 ET | [8-K](/filings/0001628280-26-062548.md) | 5.07 Shareholder vote results | 0001628280-26-062548 |
| 2026-09-01 | 20:50 ET | [8-K](/filings/0001628280-26-059879.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0001628280-26-059879 |
| 2026-08-14 | 21:24 ET | [8-K](/filings/0001628280-26-057180.md) | 5.02 Departure or appointment of officers or directors | 0001628280-26-057180 |
| 2026-08-11 | 22:13 ET | [10-Q](/filings/0001628280-26-055417.md) | Quarterly report, period 2026-06-30 | 0001628280-26-055417 |
| 2026-08-10 | 20:27 ET | [8-K](/filings/0001628280-26-055272.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-055272 |
| 2026-07-29 | 20:06 ET | [DEF 14A](/filings/0001140361-26-030043.md) | Proxy statement, period 2026-09-15 | 0001140361-26-030043 |
| 2026-07-14 | 22:33 ET | [S-1](/filings/0001628280-26-048062.md) | Registration statement | 0001628280-26-048062 |
| 2026-06-25 | 21:16 ET | [10-K](/filings/0001628280-26-045602.md) | Annual report, period 2026-03-31 | 0001628280-26-045602 |
| 2026-06-25 | 20:21 ET | [8-K](/filings/0001628280-26-045529.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-045529 |
| 2026-06-08 | 01:14 ET | [SCHEDULE 13D/A](/filings/0000899140-26-000635.md) | Ownership report, active investor, amended | 0000899140-26-000635 |
| 2026-06-05 | 20:05 ET | [8-K](/filings/0001193125-26-259525.md) | 1.02 Termination of a material agreement; 5.08 Item not in the standard list; 8.01 Other events | 0001193125-26-259525 |
| 2026-06-02 | 14:41 ET | [8-K](/filings/0001193125-26-252718.md) | 1.01 Entry into a material agreement; 2.02 Results of operations; 2.03 New direct financial obligation; 3.02 Unregistered sale of equity; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-252718 |
| 2026-02-19 | 00:19 ET | [S-1](/filings/0001628280-26-009335.md) | Registration statement | 0001628280-26-009335 |
| 2026-02-17 | 21:07 ET | [10-Q](/filings/0001628280-26-008558.md) | Quarterly report, period 2025-12-31 | 0001628280-26-008558 |
| 2026-02-17 | 21:05 ET | [8-K](/filings/0001628280-26-008553.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-008553 |
| 2026-02-02 | 13:04 ET | [8-K](/filings/0001628280-26-004461.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0001628280-26-004461 |
| 2026-01-15 | 13:42 ET | [8-K](/filings/0001628280-26-002121.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-002121 |
| 2026-01-12 | 23:58 ET | [SCHEDULE 13D/A](/filings/0000947871-26-000026.md) | Ownership report, active investor, amended | 0000947871-26-000026 |
| 2025-12-22 | 01:32 ET | [SCHEDULE 13D/A](/filings/0000947871-25-001089.md) | Ownership report, active investor, amended | 0000947871-25-001089 |
| 2025-12-18 | 22:15 ET | [8-K](/filings/0000709283-25-000091.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 3.02 Unregistered sale of equity; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0000709283-25-000091 |
| 2025-11-17 | 23:33 ET | [S-1](/filings/0001628280-25-052461.md) | Registration statement | 0001628280-25-052461 |
| 2025-11-13 | 22:07 ET | [10-Q](/filings/0000709283-25-000085.md) | Quarterly report, period 2025-09-30 | 0000709283-25-000085 |
| 2025-11-13 | 21:51 ET | [8-K](/filings/0000709283-25-000083.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000709283-25-000083 |
| 2025-10-31 | 20:34 ET | [DEF 14A](/filings/0001539497-25-002829.md) | Proxy statement, period 2025-12-16 | 0001539497-25-002829 |
| 2025-10-28 | 11:33 ET | [8-K](/filings/0000709283-25-000072.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000709283-25-000072 |
| 2025-10-20 | 21:01 ET | [8-K](/filings/0000709283-25-000063.md) | 5.08 Item not in the standard list; 8.01 Other events | 0000709283-25-000063 |
| 2025-10-10 | 20:20 ET | [SCHEDULE 13D](/filings/0000947871-25-000896.md) | Ownership report, active investor | 0000947871-25-000896 |
| 2025-10-06 | 20:03 ET | [8-K](/filings/0000709283-25-000061.md) | 4.01 Change of auditor | 0000709283-25-000061 |
| 2025-09-23 | 12:54 ET | [10-Q/A](/filings/0000709283-25-000058.md) | Quarterly report, amended, period 2025-06-30 | 0000709283-25-000058 |
| 2025-09-23 | 12:45 ET | [8-K](/filings/0001193125-25-212374.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 3.02 Unregistered sale of equity; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-212374 |
| 2025-09-15 | 20:11 ET | [8-K](/filings/0000709283-25-000047.md) | 8.01 Other events | 0000709283-25-000047 |
| 2025-09-11 | 20:23 ET | [10-Q](/filings/0000709283-25-000045.md) | Quarterly report, period 2025-06-30 | 0000709283-25-000045 |
| 2025-09-10 | 20:12 ET | [8-K](/filings/0000709283-25-000038.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000709283-25-000038 |
| 2025-08-28 | 20:12 ET | [8-K](/filings/0000709283-25-000033.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000709283-25-000033 |
| 2025-08-26 | 21:26 ET | [8-K](/filings/0000709283-25-000029.md) | 3.01 Delisting notice; 8.01 Other events; 9.01 Financial statements and exhibits | 0000709283-25-000029 |
| 2025-08-26 | 20:54 ET | [10-K](/filings/0000709283-25-000027.md) | Annual report, period 2025-03-31 | 0000709283-25-000027 |
| 2025-08-18 | 20:02 ET | [8-K](/filings/0000709283-25-000023.md) | 1.02 Termination of a material agreement; 2.02 Results of operations; 5.02 Departure or appointment of officers or directors; 8.01 Other events | 0000709283-25-000023 |
| 2025-08-08 | 20:31 ET | [8-K](/filings/0000709283-25-000021.md) | 4.02 Non-reliance on financial statements | 0000709283-25-000021 |
| 2025-07-23 | 20:21 ET | [8-K](/filings/0000709283-25-000018.md) | 3.01 Delisting notice; 8.01 Other events; 9.01 Financial statements and exhibits | 0000709283-25-000018 |
| 2025-07-08 | 21:04 ET | [8-K](/filings/0000709283-25-000016.md) | 5.02 Departure or appointment of officers or directors | 0000709283-25-000016 |
| 2025-06-18 | 20:00 ET | [8-K](/filings/0001193125-25-142697.md) | 5.02 Departure or appointment of officers or directors; 5.03 Amendment to articles or bylaws; 9.01 Financial statements and exhibits | 0001193125-25-142697 |
| 2025-06-03 | 13:00 ET | [8-K](/filings/0001193125-25-133841.md) | 2.02 Results of operations; 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-133841 |
| 2025-05-06 | 20:51 ET | [8-K](/filings/0000709283-25-000014.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000709283-25-000014 |
| 2025-04-29 | 21:08 ET | [8-K](/filings/0000709283-25-000011.md) | 5.07 Shareholder vote results | 0000709283-25-000011 |
| 2025-04-17 | 20:05 ET | [SCHEDULE 13D/A](/filings/0000950170-25-055369.md) | Ownership report, active investor, amended | 0000950170-25-055369 |
| 2025-04-17 | 01:35 ET | [8-K](/filings/0000709283-25-000007.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0000709283-25-000007 |
| 2025-04-03 | 21:14 ET | [8-K](/filings/0001193125-25-072468.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-072468 |
| 2025-03-31 | 22:45 ET | [SCHEDULE 13D/A](/filings/0000950170-25-047962.md) | Ownership report, active investor, amended | 0000950170-25-047962 |

Page 1 of 8. [Older](/companies/qmco/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 14:56 ET. No prices; not investment advice.