Financial reports
NT 10-Q
Notice of late quarterly filing
14 Feb 24
NT 10-Q
Notice of late quarterly filing
13 Nov 23
10-Q
2024 Q1
Quarterly report
8 Aug 23
ARS
2023 FY
Annual report to shareholders
27 Jul 23
10-K
2023 FY
Annual report
6 Jun 23
10-Q
2023 Q3
Quarterly report
2 Feb 23
10-Q
2023 Q2
Quarterly report
2 Nov 22
10-Q
2023 Q1
Quarterly report
4 Aug 22
10-K
2022 FY
Annual report
8 Jun 22
10-Q
2022 Q3
Quarterly report
9 Feb 22
Current reports
8-K
Quantum Provides Additional Business Updates
12 Apr 24
8-K
Entry into a Material Definitive Agreement
25 Mar 24
8-K
Entry into a Material Definitive Agreement
20 Feb 24
8-K
Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard
14 Feb 24
8-K
Quantum Announces Notification from Nasdaq Related to Delayed Form 10-Q Filing
17 Nov 23
8-K
Quantum Appoints Henk Jan Spanjaard as Chief Revenue Officer
16 Nov 23
8-K
Announces Postponement of Second Quarter
13 Nov 23
8-K
Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard
26 Sep 23
8-K
Submission of Matters to a Vote of Security Holders
14 Sep 23
8-K
Changes in Registrant's Certifying Accountant
21 Aug 23
Registration and prospectus
S-8 POS
Registration of securities for employees (post-effective amendment)
6 Jun 23
S-8
Registration of securities for employees
27 Jan 23
424B3
Prospectus supplement
13 Jan 23
S-3
Shelf registration
29 Dec 22
RW
Registration withdrawal request
29 Dec 22
S-3ASR
Automatic shelf registration
27 Dec 22
424B5
Prospectus supplement for primary offering
29 Mar 22
424B3
Prospectus supplement
30 Dec 21
S-3
Shelf registration
17 Dec 21
S-8
Registration of securities for employees
30 Sep 21
Proxies
DEFA14A
Additional proxy soliciting materials
21 Aug 23
DEFA14A
Additional proxy soliciting materials
27 Jul 23
DEF 14A
Definitive proxy
27 Jul 23
DEFA14A
Additional proxy soliciting materials
5 Jul 22
DEF 14A
Definitive proxy
5 Jul 22
PRE 14A
Preliminary proxy
16 Jun 22
DEFA14A
Additional proxy soliciting materials
2 Aug 21
DEF 14A
Definitive proxy
28 Jul 21
DEFA14A
Additional proxy soliciting materials
2 Jul 20
DEF 14A
Definitive proxy
2 Jul 20
Other
SD
Conflict minerals disclosure
31 May 23
EFFECT
Notice of effectiveness
17 Jan 23
UPLOAD
Letter from SEC
11 Jan 23
CORRESP
Correspondence with SEC
11 Jan 23
SD
Conflict minerals disclosure
31 May 22
EFFECT
Notice of effectiveness
30 Dec 21
CORRESP
Correspondence with SEC
27 Dec 21
UPLOAD
Letter from SEC
27 Dec 21
EFFECT
Notice of effectiveness
25 Aug 21
CORRESP
Correspondence with SEC
20 Aug 21
Ownership
4
Kenneth P. Gianella
23 Apr 24
4
James J Lerner
23 Apr 24
4
Henk Jan Spanjaard
23 Apr 24
4
Brian E Cabrera
23 Apr 24
3
Henk Jan Spanjaard
12 Apr 24
4
Laura A. Nash
3 Apr 24
SC 13G/A
Long Focus Capital Management, LLC
14 Feb 24
SC 13G
VANGUARD GROUP INC
13 Feb 24
SC 13G/A
Neuberger Berman Group LLC
12 Feb 24
SC 13G/A
ADK Soho Fund LP
17 Jan 24