Sec Form 4 Filing - BR Dialectic Capital Management, LLC @ QUANTUM CORP /DE/ - 2019-12-03

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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person BR Dialectic Capital Management, LLC 2. Issuer Name and Ticker or Trading Symbol QUANTUM CORP /DE/ [ QMCO] 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) 119 ROWAYTON AVENUE, 2ND FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 12/03/2019 (Street) NORWALK,, CT06853 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction 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 12/03/2019 S 969,900 D $ 5.25 0 I Held by Dialectic Antithesis Partners, LP ( 1 ) ( 2 ) ( 3 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BR Dialectic Capital Management, LLC 119 ROWAYTON AVENUE, 2ND FLOOR NORWALK,, CT06853 X Dialectic Antithesis Partners, LP 119 ROWAYTON AVENUE, 2ND FLOOR NORWALK,, CT06853 X Signatures BR Dialectic Capital Management, LLC, by B. Riley Capital Management, LLC, its sole member, by: /s/ Bryant R. Riley, Chief Executive Officer 12/05/2019 Signature of Reporting Person Date Dialectic Antithesis Partners, LP, by: /s/ John Fichthorn, Portfolio Manager 12/05/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )In addition to BR Dialectic Capital Management, LLC, a Delaware limited liability company ("BR Dialectic"), this Form 4 is being filed jointly by Dialectic Antithesis Partners, LP, a Delaware limited partnership ("Dialectic" and collectively, the "Filing Persons"). ( 2 )BR Dialectic is the general partner and investment manager of Dialectic. As a result, BR Dialectic may be deemed to indirectly beneficially own the securities 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 )On December 3, 2019, B. Riley Financial, Inc. ("BRF") purchased 969,900 shares of Common Stock from Dialectic at a purchase price of $5.25 per share. BRF previously reported that it may have been deemed to indirectly beneficially own the 969,900 shares of Common Stock that were previously held by Dialectic. As a result of the sale, the Filing Persons do not own any shares of Common Stock and are no longer subject to Section 16 of the Exchange Act of 1934.

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).

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