QUANTUM CORP /DE/ — 424B3 Filings
18 424B3 filings on record
This page lists all 424B3 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 18 424B3 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 |
|---|---|---|---|---|
| 424B3 | 424B3 | 0001628280-26-011100 | Feb 24, 2026 | — |
| 424B3 | 424B3 | 0001628280-25-053789 | Nov 24, 2025 | — |
| 424B3 | 424B3 | 0001628280-25-043409 | Oct 1, 2025 | — |
| 424B3 | 424B3 | 0001628280-25-020689 | Apr 29, 2025 | — |
| 424B3 | 424B3 | 0001628280-25-004870 | Feb 11, 2025 | — |
| 424B3 | 424B3 | 0000709283-23-000002 | Jan 17, 2023 | — |
| 424B3 | 424B3 | 0000709283-21-000079 | Dec 30, 2021 | — |
| 424B3 | 424B3 | 0000709283-21-000055 | Aug 25, 2021 | — |
| 424B3 | 424B3 | 0001193125-21-027405 | Feb 3, 2021 | — |
| 424B3 | FORM 424(B)(3) AS FILED ON JANUARY 14, 2005 | 0000709283-05-000003 | Jan 14, 2005 | — |
| 424B3 | FORM 424(B)(3) AS FILED NOVEMBER 17, 2004 | 0000709283-04-000112 | Nov 17, 2004 | — |
| 424B3 | FORM 424(B)(3) AS FILED OCTOBER 20, 2004 | 0000709283-04-000106 | Oct 20, 2004 | — |
| 424B3 | FORM 424(B)(3) AS FILED AUGUST 5, 2004 | 0000709283-04-000086 | Aug 5, 2004 | — |
| 424B3 | AS FILED ON JUNE 3, 2004 | 0000709283-04-000058 | Jun 3, 2004 | — |
| 424B3 | — | 0000709283-04-000057 | May 19, 2004 | — |
| 424B3 | POST EFFECTIVE S-3 FILING | 0000709283-04-000048 | Apr 5, 2004 | — |
| 424B3 | — | 0000709283-04-000033 | Feb 26, 2004 | — |
| 424B3 | 424(B)(3) | 0001012870-99-002034 | Jun 23, 1999 | — |