QUANTUM CORP /DE/ — 3 Filings
83 3 filings on record
This page lists all 3 filings submitted to the SEC by QUANTUM CORP /DE/ (QMCO), sorted by most recent first. Each row links to the full filing on EdgarLookup. QUANTUM CORP /DE/ has filed 83 3 documents with the SEC since 2012. To view all SEC filings by QUANTUM CORP /DE/, see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
144
15-12G
25-NSE
3
3/A
4
4/A
424B2
424B3
424B5
425
5
8-A12B
8-A12G
8-K
8-K/A
ARS
AW
CERT
CORRESP
D
DEF 14A
DEF 14C
DEFA14A
DEFC14A
DEFR14A
DFAN14A
EFFECT
NT 10-K
NT 10-Q
POS AM
PRE 14A
PRE 14C
PREC14A
PRER14A
PRRN14A
RW
S-1
S-1/A
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SC TO-I
SC TO-I/A
SCHEDULE 13D
SCHEDULE 13D/A
SCHEDULE 13G/A
SD
SD/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 3 | FORM 3 | 0001628280-26-006539 | Feb 9, 2026 | Feb 2, 2026 |
| 3 | — | 0000947871-25-001090 | Dec 23, 2025 | Dec 18, 2025 |
| 3 | FORM 3 | 0002085976-25-000003 | Sep 17, 2025 | Aug 27, 2025 |
| 3 | FORM 3 | 0002085977-25-000002 | Sep 17, 2025 | Aug 2, 2025 |
| 3 | FORM 3 | 0000709283-25-000017 | Jul 14, 2025 | Jul 2, 2025 |
| 3 | FORM 3 | 0000709283-25-000012 | Apr 30, 2025 | Apr 3, 2025 |
| 3 | FORM 3 | 0000709283-25-000006 | Apr 14, 2025 | Apr 4, 2025 |
| 3 | 3 | 0000950170-24-082109 | Jul 8, 2024 | Jun 28, 2024 |
| 3 | 3 | 0000950170-24-074377 | Jun 17, 2024 | Jun 6, 2024 |
| 3 | FORM 3 | 0000709283-24-000003 | Apr 12, 2024 | Nov 9, 2023 |
| 3 | FORM 3 | 0000709283-23-000015 | Jun 13, 2023 | Jun 6, 2023 |
| 3 | FORM 3 | 0000709283-23-000003 | Jan 18, 2023 | Jan 12, 2023 |
| 3 | FORM 3 | 0000709283-22-000053 | Nov 28, 2022 | Nov 9, 2022 |
| 3 | FORM 3 | 0000709283-22-000051 | Nov 17, 2022 | Nov 9, 2022 |
| 3 | FORM 3 SUBMISSION | 0000899243-22-030025 | Aug 29, 2022 | Aug 16, 2022 |
| 3 | FORM 3 SUBMISSION | 0000899243-22-015588 | Apr 25, 2022 | Apr 22, 2022 |
| 3 | FORM 3 | 0000709283-21-000060 | Sep 23, 2021 | Sep 21, 2021 |
| 3 | FORM 3 | 0000709283-21-000053 | Aug 19, 2021 | Aug 11, 2021 |
| 3 | FORM 3 | 0000709283-21-000022 | May 21, 2021 | — |
| 3 | FORM 3 SUBMISSION | 0000899243-19-029456 | Dec 17, 2019 | Dec 16, 2019 |
| 3 | FORM 3 SUBMISSION | 0000899243-19-026675 | Nov 5, 2019 | Nov 3, 2019 |
| 3 | FORM 3 SUBMISSION | 0000899243-19-011292 | Apr 26, 2019 | Apr 4, 2019 |
| 3 | FORM 3 SUBMISSION | 0000899243-19-007720 | Mar 14, 2019 | Mar 6, 2019 |
| 3 | FORM 3 SUBMISSION | 0001209191-19-008349 | Feb 8, 2019 | Jan 29, 2019 |
| 3 | FORM 3 | 0001615774-18-015168 | Dec 28, 2018 | Dec 26, 2018 |
| 3 | FORM 3 SUBMISSION | 0001209191-18-041832 | Jul 6, 2018 | Jul 1, 2018 |
| 3 | FORM 3 SUBMISSION | 0001209191-18-036874 | Jun 11, 2018 | May 31, 2018 |
| 3 | FORM 3 SUBMISSION | 0001209191-18-004055 | Jan 17, 2018 | Jan 16, 2018 |
| 3 | FORM 3 SUBMISSION | 0001209191-17-036654 | Jun 1, 2017 | May 31, 2017 |
| 3 | FORM 3 SUBMISSION | 0001209191-17-030074 | May 4, 2017 | — |
| 3 | FORM 3 SUBMISSION | 0001209191-17-030101 | May 4, 2017 | — |
| 3 | FORM 3 SUBMISSION | 0001209191-17-024069 | Apr 3, 2017 | Mar 31, 2017 |
| 3 | FORM 3 SUBMISSION | 0001209191-17-024071 | Apr 3, 2017 | Mar 31, 2017 |
| 3 | OWNERSHIP DOCUMENT | 0000921895-16-004791 | Jun 2, 2016 | May 31, 2016 |
| 3 | FORM 3 SUBMISSION | 0001209191-16-115557 | Apr 25, 2016 | Apr 15, 2016 |
| 3 | FORM 3 SUBMISSION | 0001209191-16-112950 | Apr 5, 2016 | Apr 1, 2016 |
| 3 | FORM 3 SUBMISSION | 0001209191-16-096040 | Feb 5, 2016 | Feb 3, 2016 |
| 3 | FORM 3 SUBMISSION | 0001209191-15-063960 | Aug 5, 2015 | Jul 28, 2015 |
| 3 | FORM 3 SUBMISSION | 0001209191-15-063958 | Aug 5, 2015 | Jul 28, 2015 |
| 3 | FORM 3 SUBMISSION | 0001209191-15-039440 | May 6, 2015 | — |
| 3 | FORM 3 | 0001181431-14-031773 | Sep 11, 2014 | Sep 9, 2014 |
| 3 | OWNERSHIP DOCUMENT | 0000921895-14-001247 | May 19, 2014 | May 9, 2014 |
| 3 | OWNERSHIP DOCUMENT | 0000921895-14-001248 | May 19, 2014 | May 9, 2014 |
| 3 | OWNERSHIP DOCUMENT | 0000921895-14-001246 | May 19, 2014 | May 9, 2014 |
| 3 | FORM 3 | 0001181431-13-044398 | Aug 13, 2013 | Aug 7, 2013 |
| 3 | FORM 3 | 0001181431-13-043950 | Aug 9, 2013 | Aug 7, 2013 |
| 3 | FORM 3 | 0001181431-13-043832 | Aug 8, 2013 | Aug 7, 2013 |
| 3 | OWNERSHIP DOCUMENT | 0001521536-12-001046 | Nov 1, 2012 | Oct 26, 2012 |
| 3 | FORM 3 | 0001140361-12-027682 | May 29, 2012 | May 24, 2012 |
| 3 | FORM 3 | 0001181431-11-047305 | Aug 29, 2011 | Aug 17, 2011 |