QUANTUM CORP /DE/ — DEF 14A Filings
31 DEF 14A filings on record
This page lists all DEF 14A 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 31 DEF 14A 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 |
|---|---|---|---|---|
| DEF 14A | DEF 14A | 0001539497-25-002829 | Oct 31, 2025 | Dec 16, 2025 |
| DEF 14A | DEF 14A | 0001193125-25-065483 | Mar 27, 2025 | Apr 24, 2025 |
| DEF 14A | DEF 14A | 0001539497-24-001359 | Jul 2, 2024 | Aug 15, 2024 |
| DEF 14A | DEF 14A | 0001539497-23-001309 | Jul 27, 2023 | Sep 12, 2023 |
| DEF 14A | DEF 14A | 0000709283-22-000022 | Jul 5, 2022 | Mar 31, 2022 |
| DEF 14A | DEF 14A | 0000709283-21-000039 | Jul 28, 2021 | Mar 31, 2021 |
| DEF 14A | DEF 14A | 0000709283-20-000005 | Jul 2, 2020 | Mar 31, 2020 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001193125-19-268540 | Oct 16, 2019 | Nov 13, 2019 |
| DEF 14A | — | 0001628280-17-006684 | Jun 22, 2017 | Mar 31, 2017 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001206774-15-002228 | Jul 21, 2015 | Aug 31, 2015 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001206774-14-002250 | Jul 29, 2014 | Sep 9, 2014 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001206774-13-002229 | Jun 24, 2013 | Aug 7, 2013 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001206774-12-002829 | Jun 28, 2012 | Aug 15, 2012 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001206774-11-001458 | Jun 29, 2011 | Aug 17, 2011 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001206774-10-001556 | Jul 1, 2010 | Aug 18, 2010 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001206774-09-001325 | Jul 8, 2009 | Aug 19, 2009 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001206774-08-001209 | Jun 27, 2008 | Aug 19, 2008 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001206774-07-001713 | Jul 2, 2007 | Aug 17, 2007 |
| DEF 14A | NOTICE OF ANNUAL MEETING OF STOCKHOLDER | 0001206774-06-001518 | Jul 11, 2006 | Aug 28, 2006 |
| DEF 14A | PROXY STATEMENT AS FILED ON JULY 27, 2005 | 0000709283-05-000061 | Jul 27, 2005 | — |
| DEF 14A | PROXY STATEMENT AS FILED ON JULY 20, 2004 | 0000709283-04-000070 | Jul 20, 2004 | — |
| DEF 14A | SCHEDULE 14A FILED ON JULY 21, 2003 | 0000709283-03-000023 | Jul 21, 2003 | — |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001012870-02-003106 | Jul 25, 2002 | Sep 12, 2002 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0000891554-01-503659 | Jul 27, 2001 | Sep 13, 2001 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0000891554-00-001789 | Jul 20, 2000 | Aug 22, 2000 |
| DEF 14A | NOTICE AND PROXY STATEMENT | 0001012870-99-002005 | Jun 21, 1999 | Jul 23, 1999 |
| DEF 14A | NOTICE AND PROXY STATEMENT | 0000950005-98-000632 | Jul 29, 1998 | Sep 15, 1998 |
| DEF 14A | NOTICE AND PROXY STATEMENT | 0000950005-97-000597 | Jun 17, 1997 | Jul 22, 1997 |
| DEF 14A | NOTICE OF MEETING AND PROXY STATEMENT | 0000950005-96-000461 | Jul 25, 1996 | Mar 31, 1996 |
| DEF 14A | NOTICE OF MEETING AND PROXY STATEMENT | 0000950005-95-000145 | Jul 31, 1995 | Jun 30, 1995 |
| DEF 14A | NOTICE OF MEETING AND PROXY STATEMENT | 0000950005-94-000042 | Jun 14, 1994 | Mar 31, 1994 |