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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
709283	Quantum Corp	QMCO	Computer Storage Devices (3572)	942665054

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1207269	R Bryant Riley	11100 Santa Monica Blvd, Suite 800 Los Angeles CA 90025	No	No	Yes	No
1464790	B. Riley Financial, Inc.	11100 Santa Monica Blvd, Suite 800 Los Angeles CA 90025	No	No	Yes	No
1505748	B. Riley Securities, Inc.	11100 Santa Monica Blvd Suite 800 Los Angeles CA 90025	No	No	Yes	No
1642765	Brc Partners Opportunity Fund, Lp	11100 Santa Monica Blvd. Suite 800 Los Angeles CA 90025	No	No	Yes	No
1658704	B. Riley Capital Management, Llc	11100 Santa Monica Blvd. Suite 800 Los Angeles CA 90025	No	No	Yes	No
1749420	Brc Partners Management Gp, Llc	11100 Santa Monica Blvd, Suite 800 Los Angeles CA 90025	No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2021-04-26	630,000	$8.25	5,359,100	No	4	S	Indirect	By B. Riley Securities, Inc.
Common Stock	Disposition	2021-04-26	310,000	$8.25	2,248,511	No	4	S	Indirect	By BRC Partners Opportunity Fund, L.P.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By B. Riley Securities, Inc.
No	4	S	Indirect	By BRC Partners Opportunity Fund, L.P.

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	10,199	Indirect	By Bryant R. Riley, as UTMA custodian for Charlie Riley
Common Stock	10,200	Indirect	By Bryant R. Riley, as UTMA custodian for Susan Riley
Common Stock	10,199	Indirect	By Bryant R. Riley, as UTMA custodian for Abigail Riley
Common Stock	10,198	Indirect	By Bryant R. Riley, as UTMA custodian for Eloise Riley

Footnotes

This Form 4 is being filed jointly by B. Riley Financial, Inc., a Delaware corporation ("BRF"), B. Riley Securities, Inc., a Delaware corporation ("BRS"), BRC Partners Opportunity Fund, LP, a Delaware limited partnership ("BRPLP"), BRC Partners Management GP, LLC, a Delaware limited liability company ("BRPGP"), B. Riley Capital Management, LLC, a New York limited liability company, a registered investment advisor ("BRCM"), and Bryant R. Riley. BRPGP is a subsidiary of BRCM, a registered investment advisor, and is the general partner of BRPLP. BRF is the parent company of BRCM. As a result, BRPGP, BRCM and BRF may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS.
Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, and BRPLP. Each of BRF, BRS, BRPGP, BRCM, and BRPLP (collectively, the "B. Riley Entities") and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein.