Quantum QMCO SEC Filings

NASDAQ QMCO
$17.62 -1.37 (-7.21%)
At close: Oct 21, 2026 · 4:00 PM EDT
EDGAR Disclosures

SEC Filings

Source SEC EDGAR

Every SEC filing Quantum Corp /De/ (QMCO) has made, as reported on EDGAR — annual and quarterly reports, current reports, insider transactions and ownership disclosures. Filter by form group, form type or period, and open any filing or its index directly.

Form Type
# Form Type Form Group Accession Date Filing Index
18-KCurrent Report0001628280-26-065547Oct 9, 2026 4:46 PM
24Insider Transaction0001628280-26-065076Oct 5, 2026 1:36 AM
34Insider Transaction0001628280-26-065074Oct 5, 2026 1:28 AM
44Insider Transaction0001628280-26-065072Oct 5, 2026 1:25 AM
54Insider Transaction0001628280-26-065068Oct 5, 2026 1:20 AM
64Insider Transaction0001628280-26-065061Oct 5, 2026 1:16 AM
74Insider Transaction0001628280-26-065025Oct 5, 2026 1:02 AM
84Insider Transaction0001628280-26-065000Oct 5, 2026 12:56 AM
94Insider Transaction0001628280-26-064989Oct 5, 2026 12:46 AM
104Insider Transaction0001628280-26-064983Oct 5, 2026 12:42 AM
118-KCurrent Report0001628280-26-063661Sep 28, 2026 12:52 PM
12S-8Prospectus0001628280-26-063488Sep 25, 2026 9:24 PM-
138-KCurrent Report0001628280-26-062548Sep 17, 2026 8:47 PM
143Insider Transaction0001628280-26-060935Sep 8, 2026 8:48 PM
158-KCurrent Report0001628280-26-059879Sep 1, 2026 4:50 PM
168-KCurrent Report0001628280-26-057180Aug 14, 2026 5:24 PM
1710-QQuarterly & Annual Report0001628280-26-055417Aug 11, 2026 10:13 PM
188-KCurrent Report0001628280-26-055272Aug 10, 2026 4:27 PM
19SCHEDULE 13GBeneficial Ownership0001140361-26-032027Aug 10, 2026 4:15 PM
204Insider Transaction0001628280-26-053354Aug 5, 2026 8:10 PM
21ARSOthers0001140361-26-030046Jul 29, 2026 4:07 PM
22DEFA14AOthers0001140361-26-030044Jul 29, 2026 4:06 PM
23DEF 14AOthers0001140361-26-030043Jul 29, 2026 4:06 PM
24424B3Prospectus0001628280-26-049821Jul 27, 2026 8:31 PM
25EFFECTOthers9999999995-26-002444Jul 24, 2026 4:15 AM
26S-1Prospectus0001628280-26-048062Jul 14, 2026 10:33 PM
274Insider Transaction0001628280-26-047490Jul 7, 2026 8:09 PM
284Insider Transaction0001628280-26-047487Jul 7, 2026 8:07 PM
2910-KQuarterly & Annual Report0001628280-26-045602Jun 25, 2026 9:16 PM
308-KCurrent Report0001628280-26-045529Jun 25, 2026 8:21 PM
31NT 10-KQuarterly & Annual Report0001193125-26-270343Jun 15, 2026 12:30 PM
324Insider Transaction0001628280-26-041759Jun 8, 2026 1:54 AM
334Insider Transaction0000899140-26-000636Jun 8, 2026 1:21 AM
34SCHEDULE 13DBeneficial Ownership Report0000899140-26-000635Jun 8, 2026 1:14 AM
358-KCurrent Report0001193125-26-259525Jun 5, 2026 8:05 PM
368-KCurrent Report0001193125-26-252718Jun 2, 2026 2:41 PM
37SDOthers0001193125-26-248727May 29, 2026 9:15 PM
384Insider Transaction0001628280-26-023655Apr 3, 2026 8:15 PM
394Insider Transaction0001628280-26-023655Apr 3, 2026 8:15 PM
404Insider Transaction0001628280-26-023655Apr 3, 2026 8:15 PM
414Insider Transaction0001193125-26-142182Apr 3, 2026 8:15 PM
424Insider Transaction0001193125-26-142182Apr 3, 2026 8:15 PM
434Insider Transaction0001193125-26-142182Apr 3, 2026 8:15 PM
444Insider Transaction0001193125-26-142179Apr 3, 2026 8:15 PM
454Insider Transaction0001193125-26-142179Apr 3, 2026 8:15 PM
464Insider Transaction0001193125-26-142179Apr 3, 2026 8:15 PM
474Insider Transaction0001628280-26-014606Mar 4, 2026 9:06 PM
484Insider Transaction0001628280-26-014606Mar 4, 2026 9:06 PM
494Insider Transaction0001628280-26-014606Mar 4, 2026 9:06 PM
50424B3Prospectus0001628280-26-011100Feb 24, 2026 9:15 PM
...

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