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Quantum (QMCO) SEC Filings & 10K Form

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Closing price 10/23/2025 04:00 PM Eastern
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Recent Quantum SEC Filings

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DateFilerForm TypeView
10/21/2025
4:06 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form PRE 14A
10/10/2025
3:20 PM		Dialectic Technology SPV LLC (Filed by)
QUANTUM CORP /DE/ (Subject)
Quantum (Subject)
Form SCHEDULE 13D
10/06/2025
3:03 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
10/03/2025
4:22 PM		Meyrath Hugues (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
10/03/2025
3:42 PM		Nash Laura A. (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
10/01/2025
3:05 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 424B3
09/30/2025
11:15 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form EFFECT
09/26/2025
4:04 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form POS AM
09/23/2025
7:54 AM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 10-Q/A
09/23/2025
7:45 AM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
09/23/2025
7:48 AM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form DEFA14A
09/17/2025
6:04 PM		Blevins Tony J (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
09/17/2025
5:58 PM		Clancy James C (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
09/17/2025
5:29 PM		Nash Laura A. (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
09/15/2025
3:11 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
09/11/2025
3:23 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
09/10/2025
3:12 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/28/2025
3:12 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/26/2025
4:26 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/26/2025
3:54 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 10-K
Annual report pursuant to Section 13 or 15(d)  
08/18/2025
3:02 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
07/14/2025
3:12 PM		Craythorne Anthony (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 3
Initial statement of beneficial ownership of securities  
07/08/2025
4:04 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/03/2025
8:00 AM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/08/2025
9:53 AM		ADK Soho Fund LP (Filed by)
QUANTUM CORP /DE/ (Subject)
Quantum (Subject)
Form SCHEDULE 13G/A
05/06/2025
3:51 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/29/2025
3:18 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 424B3
04/28/2025
11:15 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form EFFECT
04/17/2025
3:05 PM		PACIFIC INVESTMENT MANAGEMENT CO LLC (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
04/17/2025
3:05 PM		PACIFIC INVESTMENT MANAGEMENT CO LLC (Filed by)
QUANTUM CORP /DE/ (Subject)
Quantum (Subject)
Form SCHEDULE 13D/A
04/16/2025
8:35 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/04/2025
3:37 PM		Nash Laura A. (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2025
4:14 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/31/2025
5:45 PM		PACIFIC INVESTMENT MANAGEMENT CO LLC (Filed by)
QUANTUM CORP /DE/ (Subject)
Quantum (Subject)
Form SCHEDULE 13D/A
03/27/2025
3:00 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form DEF 14A
03/21/2025
7:11 PM		PACIFIC INVESTMENT MANAGEMENT CO LLC (Filed by)
QUANTUM CORP /DE/ (Subject)
Quantum (Subject)
Form SCHEDULE 13D/A
03/20/2025
4:25 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/17/2025
4:26 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form PRE 14A
02/21/2025
6:53 PM		Blue Torch Capital LP (Filed by)
QUANTUM CORP /DE/ (Subject)
Quantum (Subject)
Form SCHEDULE 13D/A
02/12/2025
4:06 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
02/11/2025
11:15 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form EFFECT
02/06/2025
4:14 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form S-1/A
01/31/2025
8:56 AM		QUANTUM CORP /DE/ (Subject)
Quantum (Subject)
VANGUARD GROUP INC (Filed by)
Form SCHEDULE 13G/A
01/27/2025
4:21 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/27/2025
4:25 PM		QUANTUM CORP /DE/ (Filer)
Quantum (Filer)
Form S-1
Registration statement under Securities Act of 1933  
01/17/2025
8:37 PM		Lerner James J (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
01/17/2025
8:22 PM		QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Spanjaard Henk Jan (Reporting)
Form 4/A
01/17/2025
8:24 PM		Lerner James J (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
01/17/2025
8:26 PM		Nash Laura A. (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
01/17/2025
8:29 PM		Cabrera Brian E (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
01/17/2025
8:31 PM		Gianella Kenneth P. (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
01/17/2025
8:35 PM		QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Spanjaard Henk Jan (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
01/17/2025
8:17 PM		Cabrera Brian E (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
01/17/2025
8:18 PM		Gianella Kenneth P. (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
01/07/2025
5:12 PM		PACIFIC INVESTMENT MANAGEMENT CO LLC (Filed by)
QUANTUM CORP /DE/ (Subject)
Quantum (Subject)
Form SCHEDULE 13D/A
01/07/2025
5:14 PM		PACIFIC INVESTMENT MANAGEMENT CO LLC (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
12/05/2024
3:15 PM		Gianella Kenneth P. (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
12/04/2024
11:24 AM		Neuberger Berman Group LLC (Filed by)
QUANTUM CORP /DE/ (Subject)
Quantum (Subject)
Form SC 13G/A
11/19/2024
6:46 PM		Nash Laura A. (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
11/19/2024
6:46 PM		Jaworksi Don (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
11/19/2024
6:46 PM		QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Spanjaard Henk Jan (Reporting)
Form 4/A
11/19/2024
6:46 PM		Lerner James J (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
11/19/2024
6:46 PM		Cabrera Brian E (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
11/19/2024
6:47 PM		Gianella Kenneth P. (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
11/19/2024
6:47 PM		Meyrath Hugues (Reporting)
QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Form 4/A
11/19/2024
6:47 PM		QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
White Yue Zhou (Reporting)
Form 4/A
11/05/2024
4:44 PM		QUANTUM CORP /DE/ (Issuer)
Quantum (Issuer)
Tracy John R. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
(Data available from 1/1/2016 forward)


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This page (NASDAQ:QMCO) was last updated on 10/24/2025 by MarketBeat.com Staff
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