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 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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(Print or Type Responses)

1. Name and Address of Reporting Person * Miiller Ronald L   2. Issuer Name and Ticker or Trading Symbol COMMVAULT SYSTEMS INC [CVLT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP, Worldwide Sales (Last) (First) (Middle) 1 COMMVAULT WAY 3. Date of Earliest Transaction (Month/Day/Year) 10/13/2015 (Street) TINTON FALLS, NJ 07724 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 (1) 10/13/2015 10/13/2015 F   406 D $ 35.68 (2) 83,348.968 D   Common Stock (3) 10/15/2015 10/15/2015 A   8,500 A (4) 115,348.968 D   Common Stock (5) 10/15/2015 10/15/2015 A   8,500 A (4) 106,848.968 D   Common Stock (6) 10/15/2015 10/15/2015 A   15,000 A (4) 98,348.968 D

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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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
Miiller Ronald L 1 COMMVAULT WAY TINTON FALLS, NJ 07724			SVP, Worldwide Sales

Signatures

Warren H. Mondschein, Attorney-in-Fact		10/15/2015
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	This sale of common stock was made to satisfy certain tax withholding obligations resulting from the vesting of restricted stock units.
(2)	Represents average sale price.
(3)	The common stock is being granted as restricted stock units and is subject to a 3-year vesting schedule, as follows: 1/3 on each anniversary of the grant based on the achievement of certain annual pre-determined performance metrics.
(4)	Not applicable.
(5)	The common stock is being granted as restricted stock units and is subject to a 3-year vesting schedule, as follows: 1/3 on the first anniversary of the grant with the remaining portion vesting in equal quarterly installments thereafter.
(6)	The common stock is being granted as restricted stock units and is subject to a 2-year vesting schedule, as follows: 50% on the first anniversary of the grant and 50% vesting on the second anniversary.

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