QUANTUM CORP /DE/ — SC 13G/A Filings
131 SC 13G/A filings on record
This page lists all SC 13G/A 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 131 SC 13G/A 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 |
|---|---|---|---|---|
| SC 13G/A | — | 0001279042-11-000004 | Feb 14, 2011 | — |
| SC 13G/A | 13G AMENDMENT | 0001037389-11-000078 | Feb 11, 2011 | — |
| SC 13G/A | SC 13G/A | 0001422848-11-000059 | Feb 10, 2011 | — |
| SC 13G/A | — | 0001086364-10-009865 | Oct 8, 2010 | — |
| SC 13G/A | — | 0000897226-10-000019 | Aug 10, 2010 | — |
| SC 13G/A | — | 0001279042-10-000005 | Aug 6, 2010 | — |
| SC 13G/A | — | 0001279042-10-000004 | Feb 12, 2010 | — |
| SC 13G/A | SC 13G/A | 0000950123-10-011590 | Feb 11, 2010 | — |
| SC 13G/A | — | 0000897226-10-000001 | Feb 10, 2010 | — |
| SC 13G/A | — | 0000905339-10-000012 | Jan 5, 2010 | — |
| SC 13G/A | — | 0000909012-09-000351 | Feb 17, 2009 | — |
| SC 13G/A | — | 0000897226-09-000098 | Feb 13, 2009 | — |
| SC 13G/A | — | 0001279042-09-000002 | Feb 13, 2009 | — |
| SC 13G/A | QUANTUM CORP | 0000357235-09-000130 | Feb 13, 2009 | — |
| SC 13G/A | — | 0001313250-09-000006 | Jan 21, 2009 | — |
| SC 13G/A | — | 0000905339-09-000006 | Jan 7, 2009 | — |
| SC 13G/A | QUANTUM | 0000909012-08-001281 | Dec 10, 2008 | — |
| SC 13G/A | — | 0000909012-08-000318 | Feb 14, 2008 | — |
| SC 13G/A | — | 0000897226-08-000055 | Feb 14, 2008 | — |
| SC 13G/A | — | 0001279042-08-000002 | Feb 14, 2008 | — |
| SC 13G/A | — | 0000919574-08-001539 | Feb 14, 2008 | — |
| SC 13G/A | QUANTUM CORP | 0000357235-08-000155 | Feb 14, 2008 | — |
| SC 13G/A | AMENDMENT NO.2 TO THE SCHEDULE 13G IN QUANTUM CORPORATION | 0001313250-08-000006 | Jan 24, 2008 | — |
| SC 13G/A | — | 0000897226-07-000168 | Feb 14, 2007 | — |
| SC 13G/A | AMENDMENT NO.5 TO SCHEDULE 13G | 0000909012-07-000378 | Feb 14, 2007 | — |
| SC 13G/A | — | 0000919574-07-000735 | Feb 13, 2007 | — |
| SC 13G/A | QUANTUM CORP | 0000357235-07-000068 | Feb 8, 2007 | — |
| SC 13G/A | — | 0001313250-07-000014 | Jan 24, 2007 | — |
| SC 13G/A | QUANTUM CORP. #4 | 0000909012-06-000576 | May 24, 2006 | — |
| SC 13G/A | — | 0000919574-06-001165 | Feb 14, 2006 | — |
| SC 13G/A | — | 0000897226-06-000027 | Feb 14, 2006 | — |
| SC 13G/A | AMENDMENT NO. 3 TO SCHEDULE 13G | 0000909012-06-000182 | Feb 13, 2006 | — |
| SC 13G/A | SC 13G/A | 0001047469-06-000149 | Jan 5, 2006 | — |
| SC 13G/A | AMENDMENT NO. 2 TO SCHEDULE 13G | 0000909012-05-000129 | Feb 14, 2005 | — |
| SC 13G/A | — | 0000897226-05-000122 | Feb 14, 2005 | — |
| SC 13G/A | SC 13G/A | 0001047469-05-002986 | Feb 10, 2005 | — |
| SC 13G/A | QUANTUM CORP | 0000909012-04-000824 | Nov 29, 2004 | — |
| SC 13G/A | 13G/A | 0001047469-04-004687 | Feb 17, 2004 | — |
| SC 13G/A | — | 0000897226-04-000145 | Feb 13, 2004 | — |
| SC 13G/A | — | 0000888002-03-000133 | Feb 12, 2003 | — |
| SC 13G/A | 13G/A | 0001047469-03-004783 | Feb 11, 2003 | — |
| SC 13G/A | — | 0000897226-03-000003 | Feb 10, 2003 | — |
| SC 13G/A | — | 0000897226-02-000059 | Feb 15, 2002 | — |
| SC 13G/A | — | 0000888002-02-000141 | Feb 12, 2002 | — |
| SC 13G/A | SC 13G/A | 0000912057-02-004130 | Feb 6, 2002 | — |
| SC 13G/A | QUANTUM CORP., AMENDMENT NO. 3 | 0000950152-02-000646 | Jan 31, 2002 | — |
| SC 13G/A | — | 0000897226-01-500053 | Dec 10, 2001 | — |
| SC 13G/A | SC 13G/A | 0000912057-01-542666 | Dec 10, 2001 | — |
| SC 13G/A | SC 13G/A | 0000912057-01-006179 | Feb 16, 2001 | — |
| SC 13G/A | SCHEDULE 13G/A | 0000912057-01-006161 | Feb 16, 2001 | — |