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 *

Powers Gregg J 		2. Issuer Name and Ticker or Trading Symbol

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

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

C/O QUANTUM CORPORATION, 224 AIRPORT PARKWAY, SUITE 300 		3. Date of Earliest Transaction (MM/DD/YYYY)

9/1/2015
(Street)

SAN JOSE, CA 95110
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

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

_ X _ Form filed by One Reporting Person
___ 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   9/1/2015     A    90090   (1) A $0.00   265392   I   Pelican Bay Holdings, LLC   (2)
Common Stock                  536500   D   (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)  Restricted Stock Units will vest over one (1) year as follows: 25% will vest on each of 12/1/15, 3/1/16, 6/1/16 and the date of Quantum Corporation's 2016 Annual Shareholder Meeting.
( 2)  The Restricted Stock Units were granted to Pelican Bay Holdings, LLC. Mr. Powers is the sole member of Pelican Bay Holdings, LLC.
( 3)  Mr. Powers also has sole voting and dispositive power with respect to 3,861,350 shares owned by commingled funds or mutual funds over which Mr. Powers serves as Portfolio Manager. As CEO and Portfolio Manager of Private Capital Management, LLC ("PCM"), Mr. Powers exercises shared voting and dispositive power with respect to 12,809,652 shares, including shares held by those PCM clients that have delegated proxy authority to PCM. Such delegation may be granted or revoked at any time at the client's discretion. PCM disclaims beneficial ownership of client owned shares over which it has dispositive power and disclaims the existence of a group.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Powers Gregg J
C/O QUANTUM CORPORATION
224 AIRPORT PARKWAY, SUITE 300
SAN JOSE, CA 95110 		X



Signatures
/s/ Astrid Becker-Celik, Attorney in Fact for Gregg J. Powers 9/2/2015
** 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.
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