FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

B. Riley Financial, Inc. 		2. Issuer Name and Ticker or Trading Symbol

QUANTUM CORP /DE/ [ QTM ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      __ X __ 10% Owner
_____ Officer (give title below)      _____ Other (specify below)
(Last)          (First)          (Middle)

21255 BURBANK BLVD., SUITE 400 		3. Date of Earliest Transaction (MM/DD/YYYY)

1/9/2019
(Street)

WOODLAND HILLS, CA 91367
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

___ Form filed by One Reporting Person
_ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   1/9/2019     P    500000   A $1.585   2195124   I   See notes   (1) (2) (3)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Explanation of Responses:
(1)  In addition to B. Riley Financial, Inc., a Delaware corporation ("BRF"), this Form 3 is being filed jointly by BRC Partners Opportunity Fund, L.P., a Delaware limited partnership ("BRPLP"), B. Riley Capital Management, LLC, a New York limited liability company ("BRCM"), BRC Partners Management GP, LLC, a Delaware limited liability company ("BRPGP"), B. Riley FBR, Inc., a Delaware corporation ("BRFBR"), Dialectic Antithesis Partners, LP, a Delaware limited partnership ("Dialectic") and BR Dialectic Capital Management, LLC, a Delaware limited liability company (collectively, the "Filing Persons").
(2)  BRPGP is the general partner of BRPLP, BRCM is an investment advisor to BRPLP and 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 BRFBR. As a result, BRF may be deemed to indirectly beneficially own the Shares held by BRFBR. BR Dialectic is the general partner and investment manager of Dialectic. BRCM is the parent company of BR Dialectic and BRF is the parent company of BRCM. As a result, BR Dialectic, BRCM and BRF may be deemed to indirectly beneficially own the Shares held by Dialectic. Each of the Filing Persons disclaims beneficial ownership of the outstanding shares of Common Stock ("Common Stock"), of Quantum Corporation, a Delaware corporation (the "Issuer"), reported herein except to the extent of its pecuniary interest therein.
(3)  Represents shares of Common Stock owned directly by BRFBR.

Remarks:
Each of the Filing Persons may be deemed to beneficially own the securities of the Issuer owned by the other Filing Persons. The filing of this Form 4 shall not be deemed an admission that the Filing Persons are the beneficial owners of any securities of the Issuer it does not directly own. Each of the Filing Persons specifically disclaims beneficial ownership of the securities reported herein that it does not directly own.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
B. Riley Financial, Inc.
21255 BURBANK BLVD.
SUITE 400
WOODLAND HILLS, CA 91367
X

BRC Partners Opportunity Fund, LP
11100 SANTA MONICA BLVD. SUITE 800
LOS ANGELES, CA 90025
X

BRC Partners Management GP, LLC
11100 SANTA MONICA BLVD SUITE 800
LOS ANGELES, CA 90025
X

B. RILEY CAPITAL MANAGEMENT, LLC
11100 SANTA MONICA BLVD.
SUITE 800
LOS ANGELES, CA 90025
X

B. RILEY FBR, INC.
11100 SANTA MONICA BLVD
SUITE 800
LOS ANGELES, CA 90025
X

Dialectic Antithesis Partners, LP
119 ROWAYTON AVENUE
2ND FLOOR
NORWALK, CT 06853
X

BR Dialectic Capital Management, LLC
119 ROWAYTON AVENUE
2ND FLOOR
NORWALK, CT 06853
X


Signatures
B. Riley Financial, Inc., by: /s/ Bryant R. Riley, Co-Chief Executive Officer 1/11/2019
** Signature of Reporting Person Date

BRC Partners Opportunity Fund, L.P., by: /s/ Bryant R. Riley, Chief Investment Officer 1/11/2019
** Signature of Reporting Person Date

BRC Partners Management GP, LLC, by B. Riley Capital Management, LLC, its sole member, by: /s/ Bryant R. Riley, Chief Executive Officer 1/11/2019
** Signature of Reporting Person Date

B. Riley Capital Management, LLC, by: /s/ Bryant R. Riley, Chief Executive Officer 1/11/2019
** Signature of Reporting Person Date

B. Riley FBR, Inc., by: /s/ Andy Moore, Chief Executive Officer 1/11/2019
** Signature of Reporting Person Date

Dialectic Antithesis Partners, LP, by: /s/ John Fichthorn, Portfolio Manager 1/11/2019
** Signature of Reporting Person Date

BR Dialectic Capital Management, LLC, by B. Riley Capital Management, LLC, its sole member, by: /s/ Bryant R. Riley, Chief Executive Officer 1/11/2019
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.